Write

import { useEffect, useState, useMemo } from 'react'
import { useSearchParams } from 'react-router-dom'
import { Plus, X, GripVertical, Clock, User, RefreshCw, Flag, Pencil, Check, Trash2, Filter, ArrowUpDown, LayoutGrid, List, ChevronLeft, ChevronRight, Link2, Layers } from 'lucide-react'
import * as Dialog from '@radix-ui/react-dialog'
import * as AlertDialog from '@radix-ui/react-alert-dialog'
import * as Tooltip from '@radix-ui/react-tooltip'
import { useProjectStore } from '../stores/projectStore'
import { useTaskStore, Task, TaskCreate, TaskUpdate } from '../stores/taskStore'
import { usePhaseStore } from '../stores/phaseStore'
import { useToastStore } from '../components/Toast'

const ITEMS_PER_PAGE = 10

const COLUMNS = [
  { id: 'backlog', title: 'Backlog', color: 'border-slate-500' },
  { id: 'in_progress', title: 'In Progress', color: 'border-accent' },
  { id: 'qa', title: 'QA', color: 'border-primary-400' },
  { id: 'done', title: 'Done', color: 'border-green-400' },
  { id: 'blocked', title: 'Blocked', color: 'border-destructive' },
]

const PRIORITY_LABELS: Record<number, string> = {
  0: 'Low',
  1: 'Medium',
  2: 'High',
  3: 'Critical',
}

const STATUS_LABELS: Record<string, string> = {
  backlog: 'Backlog',
  in_progress: 'In Progress',
  qa: 'QA',
  done: 'Done',
  blocked: 'Blocked',
}

export default function KanbanBoard() {
  const [searchParams, setSearchParams] = useSearchParams()
  const { currentProject } = useProjectStore()
  const { tasks, fetchTasks, createTask, updateTask, updateTaskStatus, deleteTask, isTaskDeleting, isLoading } = useTaskStore()
  const { phases, fetchPhases } = usePhaseStore()
  const { addToast } = useToastStore()
  const [showAddDialog, setShowAddDialog] = useState(false)
  const [newTaskName, setNewTaskName] = useState('')
  const [newTaskDescription, setNewTaskDescription] = useState('')
  const [newTaskPriority, setNewTaskPriority] = useState(0)
  const [newTaskPhaseId, setNewTaskPhaseId] = useState<number | null>(null)
  const [isCreating, setIsCreating] = useState(false)
  const [draggedTask, setDraggedTask] = useState<number | null>(null)
  const [selectedTask, setSelectedTask] = useState<Task | null>(null)
  const [isEditing, setIsEditing] = useState(false)
  const [editName, setEditName] = useState('')
  const [editDescription, setEditDescription] = useState('')
  const [editPriority, setEditPriority] = useState(0)
  const [editPhaseId, setEditPhaseId] = useState<number | null>(null)
  const [isSaving, setIsSaving] = useState(false)
  const [showDeleteDialog, setShowDeleteDialog] = useState(false)
  const [isDeleting, setIsDeleting] = useState(false)
  const [showUnsavedDialog, setShowUnsavedDialog] = useState(false)
  const [pendingCloseAction, setPendingCloseAction] = useState<'close' | 'cancel' | null>(null)
  // Filter and Sort state - initialize from URL params
  const getInitialPriorityFilter = (): number | 'all' => {
    const param = searchParams.get('priority')
    if (param === 'all' || param === null) return 'all'
    const num = parseInt(param, 10)
    return [0, 1, 2, 3].includes(num) ? num : 'all'
  }
  const getInitialStatusFilter = (): string | 'all' => {
    const param = searchParams.get('status')
    if (param === 'all' || param === null) return 'all'
    const validStatuses = ['backlog', 'in_progress', 'qa', 'done', 'blocked']
    return validStatuses.includes(param) ? param : 'all'
  }
  const getInitialSortOrder = (): 'newest' | 'oldest' | 'priority' => {
    const param = searchParams.get('sort')
    if (param === 'newest' || param === 'oldest' || param === 'priority') return param
    return 'newest'
  }
  const getInitialAgentTypeFilter = (): string | 'all' => {
    const param = searchParams.get('agent')
    if (param === 'all' || param === null) return 'all'
    return param
  }
  const getInitialViewMode = (): 'kanban' | 'list' => {
    const param = searchParams.get('view')
    if (param === 'list') return 'list'
    return 'kanban'
  }

  const [priorityFilter, setPriorityFilter] = useState<number | 'all'>(getInitialPriorityFilter)
  const [statusFilter, setStatusFilter] = useState<string | 'all'>(getInitialStatusFilter)
  const [sortOrder, setSortOrder] = useState<'newest' | 'oldest' | 'priority'>(getInitialSortOrder)
  const [agentTypeFilter, setAgentTypeFilter] = useState<string | 'all'>(getInitialAgentTypeFilter)
  // View mode and pagination state
  const [viewMode, setViewMode] = useState<'kanban' | 'list'>(getInitialViewMode)
  // Phase grouping state
  const [phaseGrouping, setPhaseGrouping] = useState<boolean>(() => searchParams.get('groupByPhase') === 'true')
  const [currentPage, setCurrentPage] = useState(1)

  useEffect(() => {
    if (currentProject?.id) {
      fetchTasks(currentProject.id)
      fetchPhases(currentProject.id)
    }
  }, [currentProject?.id, fetchTasks, fetchPhases])

  // Handle deep linking - select task from URL param after tasks are loaded
  useEffect(() => {
    const taskIdParam = searchParams.get('task')
    if (taskIdParam && tasks.length > 0) {
      const taskId = parseInt(taskIdParam, 10)
      const task = tasks.find(t => t.id === taskId)
      if (task) {
        setSelectedTask(task)
      }
    }
  }, [searchParams, tasks])

  // Update URL when task is selected
  const handleSelectTask = (task: Task) => {
    setSelectedTask(task)
    const newParams = new URLSearchParams(searchParams)
    newParams.set('task', task.id.toString())
    setSearchParams(newParams)
  }

  // Clear task from URL when panel is closed
  const clearTaskFromUrl = () => {
    const newParams = new URLSearchParams(searchParams)
    newParams.delete('task')
    setSearchParams(newParams)
  }

  // Update URL when filter changes
  const handlePriorityFilterChange = (value: number | 'all') => {
    setPriorityFilter(value)
    const newParams = new URLSearchParams(searchParams)
    if (value === 'all') {
      newParams.delete('priority')
    } else {
      newParams.set('priority', value.toString())
    }
    setSearchParams(newParams)
  }

  // Update URL when status filter changes
  const handleStatusFilterChange = (value: string | 'all') => {
    setStatusFilter(value)
    const newParams = new URLSearchParams(searchParams)
    if (value === 'all') {
      newParams.delete('status')
    } else {
      newParams.set('status', value)
    }
    setSearchParams(newParams)
  }

  // Update URL when sort changes
  const handleSortOrderChange = (value: 'newest' | 'oldest' | 'priority') => {
    setSortOrder(value)
    const newParams = new URLSearchParams(searchParams)
    if (value === 'newest') {
      newParams.delete('sort') // default value, no need to store
    } else {
      newParams.set('sort', value)
    }
    setSearchParams(newParams)
  }

  // Update URL when agent type filter changes
  const handleAgentTypeFilterChange = (value: string | 'all') => {
    setAgentTypeFilter(value)
    const newParams = new URLSearchParams(searchParams)
    if (value === 'all') {
      newParams.delete('agent')
    } else {
      newParams.set('agent', value)
    }
    setSearchParams(newParams)
  }

  // Update URL when view mode changes
  const handleViewModeChange = (value: 'kanban' | 'list') => {
    setViewMode(value)
    const newParams = new URLSearchParams(searchParams)
    if (value === 'kanban') {
      newParams.delete('view') // default value, no need to store
    } else {
      newParams.set('view', value)
    }
    setSearchParams(newParams)
  }

  // Update URL when phase grouping changes
  const handlePhaseGroupingChange = (value: boolean) => {
    setPhaseGrouping(value)
    const newParams = new URLSearchParams(searchParams)
    if (!value) {
      newParams.delete('groupByPhase')
    } else {
      newParams.set('groupByPhase', 'true')
    }
    setSearchParams(newParams)
  }

  // Reset all filters to defaults
  const handleResetFilters = () => {
    setPriorityFilter('all')
    setStatusFilter('all')
    setAgentTypeFilter('all')
    setSortOrder('newest')
    setPhaseGrouping(false)
    setCurrentPage(1)
    const newParams = new URLSearchParams(searchParams)
    newParams.delete('priority')
    newParams.delete('status')
    newParams.delete('agent')
    newParams.delete('sort')
    newParams.delete('groupByPhase')
    setSearchParams(newParams)
  }

  // Check if filters are active (non-default)
  const hasActiveFilters = priorityFilter !== 'all' || statusFilter !== 'all' || agentTypeFilter !== 'all' || sortOrder !== 'newest' || phaseGrouping

  // Filtered and sorted tasks
  const filteredAndSortedTasks = useMemo(() => {
    let result = [...tasks]

    // Apply priority filter
    if (priorityFilter !== 'all') {
      result = result.filter(task => task.priority === priorityFilter)
    }

    // Apply status filter
    if (statusFilter !== 'all') {
      result = result.filter(task => task.status === statusFilter)
    }

    // Apply agent type filter
    if (agentTypeFilter !== 'all') {
      result = result.filter(task => task.agent_type === agentTypeFilter)
    }

    // Apply sort
    result.sort((a, b) => {
      if (sortOrder === 'newest') {
        return new Date(b.created_at).getTime() - new Date(a.created_at).getTime()
      } else if (sortOrder === 'oldest') {
        return new Date(a.created_at).getTime() - new Date(b.created_at).getTime()
      } else {
        // priority - highest first
        return b.priority - a.priority
      }
    })

    return result
  }, [tasks, priorityFilter, statusFilter, agentTypeFilter, sortOrder])

  // Pagination calculations
  const totalPages = Math.ceil(filteredAndSortedTasks.length / ITEMS_PER_PAGE)
  const paginatedTasks = useMemo(() => {
    const startIndex = (currentPage - 1) * ITEMS_PER_PAGE
    return filteredAndSortedTasks.slice(startIndex, startIndex + ITEMS_PER_PAGE)
  }, [filteredAndSortedTasks, currentPage])

  // Reset page when filter changes
  useEffect(() => {
    setCurrentPage(1)
  }, [priorityFilter, statusFilter, agentTypeFilter, sortOrder])

  const getTasksByStatus = (status: string) => {
    return filteredAndSortedTasks.filter((task) => task.status === status)
  }

  // Helper to get dependency task names
  const getDependencyNames = (dependsOn: number[] | null): string[] => {
    if (!dependsOn || dependsOn.length === 0) return []
    return dependsOn
      .map(taskId => tasks.find(t => t.id === taskId)?.name || `Task #${taskId}`)
  }

  const handleCreateTask = async () => {
    if (!currentProject || !newTaskName.trim()) return
    setIsCreating(true)
    try {
      const taskData: TaskCreate = {
        name: newTaskName.trim(),
        description: newTaskDescription.trim() || undefined,
        priority: newTaskPriority,
        phase_id: newTaskPhaseId,
      }
      await createTask(currentProject.id, taskData)
      setNewTaskName('')
      setNewTaskDescription('')
      setNewTaskPriority(0)
      setNewTaskPhaseId(null)
      setShowAddDialog(false)
    } catch (error) {
      console.error('Failed to create task:', error)
      addToast('error', 'Create Failed', 'Failed to create task. Please try again.')
    } finally {
      setIsCreating(false)
    }
  }

  const handleDragStart = (taskId: number) => {
    setDraggedTask(taskId)
  }

  const handleDragOver = (e: React.DragEvent) => {
    e.preventDefault()
  }

  const handleDrop = async (targetStatus: string) => {
    if (draggedTask === null) return
    try {
      await updateTaskStatus(draggedTask, targetStatus)
    } catch (error) {
      console.error('Failed to update task status:', error)
      addToast('error', 'Update Failed', 'Failed to update task status. Please try again.')
    }
    setDraggedTask(null)
  }

  const handleStartEdit = () => {
    if (!selectedTask) return
    setEditName(selectedTask.name)
    setEditDescription(selectedTask.description || '')
    setEditPriority(selectedTask.priority)
    setEditPhaseId(selectedTask.phase_id)
    setIsEditing(true)
  }

  // Check if edit form has unsaved changes
  const hasUnsavedChanges = () => {
    if (!selectedTask || !isEditing) return false
    return (
      editName.trim() !== selectedTask.name ||
      (editDescription.trim() || '') !== (selectedTask.description || '') ||
      editPriority !== selectedTask.priority ||
      editPhaseId !== selectedTask.phase_id
    )
  }

  const handleCancelEdit = () => {
    if (hasUnsavedChanges()) {
      setPendingCloseAction('cancel')
      setShowUnsavedDialog(true)
    } else {
      setIsEditing(false)
    }
  }

  const handleClosePanel = () => {
    if (hasUnsavedChanges()) {
      setPendingCloseAction('close')
      setShowUnsavedDialog(true)
    } else {
      setSelectedTask(null)
      setIsEditing(false)
      clearTaskFromUrl()
    }
  }

  const handleDiscardChanges = () => {
    setShowUnsavedDialog(false)
    if (pendingCloseAction === 'close') {
      setSelectedTask(null)
      clearTaskFromUrl()
    }
    setIsEditing(false)
    setPendingCloseAction(null)
  }

  const handleKeepEditing = () => {
    setShowUnsavedDialog(false)
    setPendingCloseAction(null)
  }

  const handleSaveEdit = async () => {
    if (!selectedTask) return
    setIsSaving(true)
    try {
      const updates: TaskUpdate = {
        name: editName.trim(),
        description: editDescription.trim() || undefined,
        priority: editPriority,
        phase_id: editPhaseId,
      }
      const updatedTask = await updateTask(selectedTask.id, updates)
      setSelectedTask(updatedTask)
      setIsEditing(false)
    } catch (error) {
      console.error('Failed to update task:', error)
      addToast('error', 'Save Failed', 'Failed to save task changes. Please try again.')
    } finally {
      setIsSaving(false)
    }
  }

  const handleDeleteTask = async () => {
    if (!selectedTask) return
    // Check if already being deleted (prevents rapid clicks)
    if (isTaskDeleting(selectedTask.id)) return

    const taskIdToDelete = selectedTask.id
    const taskName = selectedTask.name
    setIsDeleting(true)
    // Close dialog immediately to prevent additional clicks
    setShowDeleteDialog(false)

    try {
      await deleteTask(taskIdToDelete)
      setSelectedTask(null)
      clearTaskFromUrl()
    } catch (error) {
      console.error('Failed to delete task:', error)
      addToast('error', 'Delete Failed', `Failed to delete task "${taskName}". Please try again.`)
      // Re-open dialog if delete failed so user can retry
      setShowDeleteDialog(true)
    } finally {
      setIsDeleting(false)
    }
  }

  if (!currentProject) {
    return (

Select a project to view its Kanban board

    )
  }

  return (

      {/* Header */}

Kanban Board

          {/* Priority Filter */}

            <Filter size={16} className="text-muted-foreground" />
            <select
              value={priorityFilter === 'all' ? 'all' : priorityFilter.toString()}
              onChange={(e) => handlePriorityFilterChange(e.target.value === 'all' ? 'all' : Number(e.target.value))}
              className="px-3 py-1.5 bg-card border border-border rounded-lg text-sm text-foreground focus:outline-none focus:ring-2 focus:ring-accent"
            >
              <option value="all">All Priorities</option>
              <option value="3">Critical</option>
              <option value="2">High</option>
              <option value="1">Medium</option>
              <option value="0">Low</option>
            </select>

          {/* Status Filter */}

            <select
              value={statusFilter}
              onChange={(e) => handleStatusFilterChange(e.target.value)}
              className="px-3 py-1.5 bg-card border border-border rounded-lg text-sm text-foreground focus:outline-none focus:ring-2 focus:ring-accent"
            >
              <option value="all">All Statuses</option>
              <option value="backlog">Backlog</option>
              <option value="in_progress">In Progress</option>
              <option value="qa">QA</option>
              <option value="done">Done</option>
              <option value="blocked">Blocked</option>
            </select>

          {/* Agent Type Filter */}

            <User size={16} className="text-muted-foreground" />
            <select
              value={agentTypeFilter}
              onChange={(e) => handleAgentTypeFilterChange(e.target.value)}
              className="px-3 py-1.5 bg-card border border-border rounded-lg text-sm text-foreground focus:outline-none focus:ring-2 focus:ring-accent"
            >
              <option value="all">All Agents</option>
              <option value="coder">Coder Agent</option>
              <option value="qa_reviewer">QA Reviewer Agent</option>
              <option value="architect">Architect Agent</option>
              <option value="debugger">Debugger Agent</option>
            </select>

          {/* Sort Order */}

            <ArrowUpDown size={16} className="text-muted-foreground" />
            <select
              value={sortOrder}
              onChange={(e) => handleSortOrderChange(e.target.value as 'newest' | 'oldest' | 'priority')}
              className="px-3 py-1.5 bg-card border border-border rounded-lg text-sm text-foreground focus:outline-none focus:ring-2 focus:ring-accent"
            >
              <option value="newest">Newest First</option>
              <option value="oldest">Oldest First</option>
              <option value="priority">By Priority</option>
            </select>

          {/* Reset Filters Button */}
          {hasActiveFilters && (
            <button
              onClick={handleResetFilters}
              className="flex items-center gap-1.5 px-3 py-1.5 text-sm text-muted-foreground hover:text-foreground hover:bg-secondary rounded-lg transition-colors"
              title="Reset Filters"
            >
              <RefreshCw size={14} />
              Reset
            </button>
          )}

          {/* Phase Grouping Toggle */}
          {viewMode === 'kanban' && phases.length > 0 && (
            <button
              onClick={() => handlePhaseGroupingChange(!phaseGrouping)}
              className={`flex items-center gap-2 px-3 py-1.5 text-sm rounded-lg transition-colors ${
                phaseGrouping
                  ? 'bg-accent text-white'
                  : 'bg-card border border-border text-muted-foreground hover:text-foreground'
              }`}
              title="Group by Phase"
            >
              <Layers size={16} />
              Group by Phase
            </button>
          )}

          {/* View Mode Toggle */}

            <button
              onClick={() => handleViewModeChange('kanban')}
              className={`p-1.5 rounded ${viewMode === 'kanban' ? 'bg-accent text-white' : 'text-muted-foreground hover:text-foreground'}`}
              title="Kanban View"
            >
              <LayoutGrid size={18} />
            </button>
            <button
              onClick={() => handleViewModeChange('list')}
              className={`p-1.5 rounded ${viewMode === 'list' ? 'bg-accent text-white' : 'text-muted-foreground hover:text-foreground'}`}
              title="List View"
            >
              <List size={18} />
            </button>

        <Dialog.Root open={showAddDialog} onOpenChange={setShowAddDialog}>
          <Dialog.Trigger asChild>
            <button className="btn-accent flex items-center gap-2">
              <Plus size={18} />
              Add Task
            </button>
          </Dialog.Trigger>
          <Dialog.Portal>
            <Dialog.Overlay className="fixed inset-0 bg-black/50 z-50" />
            <Dialog.Content className="fixed top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 bg-card border border-border rounded-lg p-4 md:p-6 w-[calc(100%-2rem)] max-w-md max-h-[calc(100vh-2rem)] overflow-y-auto z-50 shadow-xl">

                <Dialog.Title className="text-xl font-semibold text-foreground">
                  Add New Task
                </Dialog.Title>
                <Dialog.Close asChild>
                  <button className="text-muted-foreground hover:text-foreground" aria-label="Close dialog">
                    <X size={20} />
                  </button>
                </Dialog.Close>

              <Dialog.Description className="text-muted-foreground mb-4">
                Create a new task for this project.
              </Dialog.Description>

                    Task Name *

                  <input
                    type="text"
                    value={newTaskName}
                    onChange={(e) => setNewTaskName(e.target.value)}
                    className="w-full px-3 py-2 bg-background border border-border rounded-lg text-foreground placeholder-muted-foreground focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent"
                    placeholder="Enter task name"
                  />

                    Description

                  <textarea
                    value={newTaskDescription}
                    onChange={(e) => setNewTaskDescription(e.target.value)}
                    rows={3}
                    className="w-full px-3 py-2 bg-background border border-border rounded-lg text-foreground placeholder-muted-foreground focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent resize-none"
                    placeholder="Enter task description"
                  />

                    Priority

                  <select
                    value={newTaskPriority}
                    onChange={(e) => setNewTaskPriority(Number(e.target.value))}
                    className="w-full px-3 py-2 bg-background border border-border rounded-lg text-foreground focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent"
                  >
                    <option value={0}>Low</option>
                    <option value={1}>Medium</option>
                    <option value={2}>High</option>
                    <option value={3}>Critical</option>
                  </select>

                    Phase

                  <select
                    value={newTaskPhaseId ?? ''}
                    onChange={(e) => setNewTaskPhaseId(e.target.value ? Number(e.target.value) : null)}
                    className="w-full px-3 py-2 bg-background border border-border rounded-lg text-foreground focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent"
                  >
                    <option value="">No Phase</option>
                    {phases.map((phase) => (
                      <option key={phase.id} value={phase.id}>{phase.name}</option>
                    ))}
                  </select>

                <Dialog.Close asChild>
                  <button className="px-4 py-2 text-sm text-secondary-foreground hover:bg-secondary rounded-lg transition-colors">
                    Cancel
                  </button>
                </Dialog.Close>
                <button
                  onClick={handleCreateTask}
                  disabled={isCreating || !newTaskName.trim()}
                  className="px-4 py-2 text-sm bg-accent hover:bg-accent/80 text-white rounded-lg transition-colors disabled:opacity-50"
                >
                  {isCreating ? 'Creating...' : 'Create Task'}
                </button>

            </Dialog.Content>
          </Dialog.Portal>
        </Dialog.Root>

      {/* Main Content Area */}

        {viewMode === 'list' ? (
          /* List View with Pagination */

            {/* Task List Table */}

                    Task Name
                    Status
                    Priority
                    Created

                  {isLoading && tasks.length === 0 ? (

                        Loading...

                  ) : paginatedTasks.length === 0 ? (

                        No tasks found

                  ) : (
                    paginatedTasks.map((task) => (

 handleSelectTask(task)}
                        className={`border-t border-border hover:bg-secondary/50 cursor-pointer ${
                          selectedTask?.id === task.id ? 'bg-secondary' : ''
                        }`}
                      >

{task.name}

                            {/* Flagged for Review Indicator in List View */}
                            {task.flagged_for_review && (
                              <Tooltip.Provider>
                                <Tooltip.Root>
                                  <Tooltip.Trigger asChild>

                                      <Flag size={12} />

                                  </Tooltip.Trigger>
                                  <Tooltip.Portal>
                                    <Tooltip.Content
                                      className="bg-popover text-popover-foreground px-3 py-2 rounded-lg shadow-lg border border-border text-sm max-w-xs z-50"
                                      sideOffset={5}
                                    >
                                      Flagged for human review
                                      <Tooltip.Arrow className="fill-popover" />
                                    </Tooltip.Content>
                                  </Tooltip.Portal>
                                </Tooltip.Root>
                              </Tooltip.Provider>
                            )}
                            {/* Dependency Indicator in List View */}
                            {task.depends_on && task.depends_on.length > 0 && (
                              <Tooltip.Provider>
                                <Tooltip.Root>
                                  <Tooltip.Trigger asChild>

                                      <Link2 size={12} />
                                      {task.depends_on.length}

                                  </Tooltip.Trigger>
                                  <Tooltip.Portal>
                                    <Tooltip.Content
                                      className="bg-popover text-popover-foreground px-3 py-2 rounded-lg shadow-lg border border-border text-sm max-w-xs z-50"
                                      sideOffset={5}
                                    >

Depends on:

                                        {getDependencyNames(task.depends_on).map((name, idx) => (

{name}

                                        ))}

                                      <Tooltip.Arrow className="fill-popover" />
                                    </Tooltip.Content>
                                  </Tooltip.Portal>
                                </Tooltip.Root>
                              </Tooltip.Provider>
                            )}

                          {task.description && (

                              {task.description}

                          )}

                            {STATUS_LABELS[task.status] || task.status}

                            {PRIORITY_LABELS[task.priority] || 'Unknown'}

                          {new Date(task.created_at).toLocaleDateString()}

                    ))
                  )}

            {/* Pagination Controls */}
            {totalPages > 1 && (

                  Showing {((currentPage - 1) * ITEMS_PER_PAGE) + 1} to {Math.min(currentPage * ITEMS_PER_PAGE, filteredAndSortedTasks.length)} of {filteredAndSortedTasks.length} tasks

                  <button
                    onClick={() => setCurrentPage(p => Math.max(1, p - 1))}
                    disabled={currentPage === 1}
                    className="p-2 rounded-lg bg-card border border-border text-muted-foreground hover:text-foreground hover:bg-secondary disabled:opacity-50 disabled:cursor-not-allowed"
                  >
                    <ChevronLeft size={18} />
                  </button>

                    {Array.from({ length: totalPages }, (_, i) => i + 1).map((page) => (
                      <button
                        key={page}
                        onClick={() => setCurrentPage(page)}
                        className={`w-8 h-8 rounded-lg text-sm ${
                          page === currentPage
                            ? 'bg-accent text-white'
                            : 'bg-card border border-border text-muted-foreground hover:text-foreground hover:bg-secondary'
                        }`}
                      >
                        {page}
                      </button>
                    ))}

                  <button
                    onClick={() => setCurrentPage(p => Math.min(totalPages, p + 1))}
                    disabled={currentPage === totalPages}
                    className="p-2 rounded-lg bg-card border border-border text-muted-foreground hover:text-foreground hover:bg-secondary disabled:opacity-50 disabled:cursor-not-allowed"
                  >
                    <ChevronRight size={18} />
                  </button>

            )}

        ) : (
        /* Kanban Columns */
        <div className={`flex-1 flex gap-4 overflow-x-auto pb-4 ${selectedTask ? 'mr-0' : ''}`}>
          {COLUMNS.map((column) => (
          <div
            key={column.id}
            className={`flex-shrink-0 w-72 bg-card rounded-lg border-t-2 ${column.color}`}
            onDragOver={handleDragOver}
            onDrop={() => handleDrop(column.id)}
          >
            {/* Column Header */}

{column.title}

                  {getTasksByStatus(column.id).length}

            {/* Column Content */}

              {isLoading && tasks.length === 0 ? (

                  Loading...

              ) : getTasksByStatus(column.id).length === 0 ? (

                  No tasks

              ) : (
                getTasksByStatus(column.id).map((task) => (

 handleDragStart(task.id)}
                    onClick={() => handleSelectTask(task)}
                    className={`kanban-card bg-background rounded-lg p-4 border border-border cursor-pointer hover:border-muted-foreground ${
                      draggedTask === task.id ? 'opacity-50' : ''
                    } ${selectedTask?.id === task.id ? 'ring-2 ring-accent' : ''}`}
                  >

                      <GripVertical size={16} className="text-muted-foreground mt-0.5 flex-shrink-0" />

{task.name}

                        {task.description && (

                            {task.description}

                        )}

                            <span
                              className={`badge ${
                                column.id === 'backlog'
                                  ? 'badge-backlog'
                                  : column.id === 'in_progress'
                                  ? 'badge-in-progress'
                                  : column.id === 'qa'
                                  ? 'badge-qa'
                                  : column.id === 'done'
                                  ? 'badge-done'
                                  : 'badge-blocked'
                              }`}
                            >
                              {column.title}

                            {/* Flagged for Review Indicator */}
                            {task.flagged_for_review && (
                              <Tooltip.Provider>
                                <Tooltip.Root>
                                  <Tooltip.Trigger asChild>

                                      <Flag size={12} />

                                  </Tooltip.Trigger>
                                  <Tooltip.Portal>
                                    <Tooltip.Content
                                      className="bg-popover text-popover-foreground px-3 py-2 rounded-lg shadow-lg border border-border text-sm max-w-xs z-50"
                                      sideOffset={5}
                                    >
                                      Flagged for human review
                                      <Tooltip.Arrow className="fill-popover" />
                                    </Tooltip.Content>
                                  </Tooltip.Portal>
                                </Tooltip.Root>
                              </Tooltip.Provider>
                            )}
                            {/* Dependency Indicator */}
                            {task.depends_on && task.depends_on.length > 0 && (
                              <Tooltip.Provider>
                                <Tooltip.Root>
                                  <Tooltip.Trigger asChild>

                                      <Link2 size={12} />
                                      {task.depends_on.length}

                                  </Tooltip.Trigger>
                                  <Tooltip.Portal>
                                    <Tooltip.Content
                                      className="bg-popover text-popover-foreground px-3 py-2 rounded-lg shadow-lg border border-border text-sm max-w-xs z-50"
                                      sideOffset={5}
                                    >

Depends on:

                                        {getDependencyNames(task.depends_on).map((name, idx) => (

{name}

                                        ))}

                                      <Tooltip.Arrow className="fill-popover" />
                                    </Tooltip.Content>
                                  </Tooltip.Portal>
                                </Tooltip.Root>
                              </Tooltip.Provider>
                            )}

                            {task.priority === 3 ? 'Critical' :
                             task.priority === 2 ? 'High' :
                             task.priority === 1 ? 'Medium' : 'Low'}

                ))
              )}

          ))}

        )}

        {/* Task Details Panel */}
        {selectedTask && (

Task Details

                {!isEditing && (
                  <>
                    <button
                      onClick={handleStartEdit}
                      className="text-muted-foreground hover:text-accent transition-colors"
                      title="Edit Task"
                    >
                      <Pencil size={18} />
                    </button>
                    <AlertDialog.Root open={showDeleteDialog} onOpenChange={setShowDeleteDialog}>
                      <AlertDialog.Trigger asChild>
                        <button
                          className="text-muted-foreground hover:text-destructive transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
                          title="Delete Task"
                          disabled={isDeleting || (selectedTask ? isTaskDeleting(selectedTask.id) : false)}
                        >
                          <Trash2 size={18} />
                        </button>
                      </AlertDialog.Trigger>
                      <AlertDialog.Portal>
                        <AlertDialog.Overlay className="fixed inset-0 bg-black/50 z-50" />
                        <AlertDialog.Content className="fixed top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 bg-card border border-border rounded-lg p-4 md:p-6 w-[calc(100%-2rem)] max-w-md max-h-[calc(100vh-2rem)] overflow-y-auto z-50 shadow-xl">
                          <AlertDialog.Title className="text-xl font-semibold text-foreground">
                            Delete Task
                          </AlertDialog.Title>
                          <AlertDialog.Description className="mt-3 text-muted-foreground">
                            Are you sure you want to delete {selectedTask.name}?
                            This action cannot be undone.
                          </AlertDialog.Description>

                            <AlertDialog.Cancel asChild>
                              <button className="px-4 py-2 text-sm text-secondary-foreground hover:bg-secondary rounded-lg transition-colors">
                                Cancel
                              </button>
                            </AlertDialog.Cancel>
                            <AlertDialog.Action asChild>
                              <button
                                onClick={handleDeleteTask}
                                disabled={isDeleting || (selectedTask ? isTaskDeleting(selectedTask.id) : false)}
                                className="px-4 py-2 text-sm bg-destructive hover:bg-destructive/80 text-white rounded-lg transition-colors disabled:opacity-50"
                              >
                                {isDeleting || (selectedTask && isTaskDeleting(selectedTask.id)) ? 'Deleting...' : 'Delete Task'}
                              </button>
                            </AlertDialog.Action>

                        </AlertDialog.Content>
                      </AlertDialog.Portal>
                    </AlertDialog.Root>
                  </>
                )}
                <button
                  onClick={handleClosePanel}
                  className="text-muted-foreground hover:text-foreground transition-colors"
                  title="Close"
                >
                  <X size={20} />
                </button>

              {isEditing ? (
                /* Edit Form */

                    Name *
                    <input
                      type="text"
                      value={editName}
                      onChange={(e) => setEditName(e.target.value)}
                      className="w-full px-3 py-2 bg-background border border-border rounded-lg text-foreground placeholder-muted-foreground focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent"
                      placeholder="Task name"
                    />

                    Description
                    <textarea
                      value={editDescription}
                      onChange={(e) => setEditDescription(e.target.value)}
                      rows={3}
                      className="w-full px-3 py-2 bg-background border border-border rounded-lg text-foreground placeholder-muted-foreground focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent resize-none"
                      placeholder="Task description"
                    />

                    Priority
                    <select
                      value={editPriority}
                      onChange={(e) => setEditPriority(Number(e.target.value))}
                      className="w-full px-3 py-2 bg-background border border-border rounded-lg text-foreground focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent"
                    >
                      <option value={0}>Low</option>
                      <option value={1}>Medium</option>
                      <option value={2}>High</option>
                      <option value={3}>Critical</option>
                    </select>

                    Phase
                    <select
                      value={editPhaseId ?? ''}
                      onChange={(e) => setEditPhaseId(e.target.value ? Number(e.target.value) : null)}
                      className="w-full px-3 py-2 bg-background border border-border rounded-lg text-foreground focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent"
                    >
                      <option value="">No Phase</option>
                      {phases.map((phase) => (
                        <option key={phase.id} value={phase.id}>{phase.name}</option>
                      ))}
                    </select>

                    <button
                      onClick={handleCancelEdit}
                      className="flex-1 px-3 py-2 text-sm text-secondary-foreground hover:bg-secondary rounded-lg transition-colors"
                    >
                      Cancel
                    </button>
                    <button
                      onClick={handleSaveEdit}
                      disabled={isSaving || !editName.trim()}
                      className="flex-1 flex items-center justify-center gap-2 px-3 py-2 text-sm bg-accent hover:bg-accent/80 text-white rounded-lg transition-colors disabled:opacity-50"
                    >
                      {isSaving ? 'Saving...' : <><Check size={16} /> Save</>}
                    </button>

              ) : (
                /* View Mode */
                <>
                  {/* Task Name */}

                    Name

{selectedTask.name}

                  {/* Description */}

                    Description

                      {selectedTask.description || No description}

                  {/* Status */}

                    Status

                      {STATUS_LABELS[selectedTask.status] || selectedTask.status}

                  {/* Priority */}

                    Priority

                      {PRIORITY_LABELS[selectedTask.priority] || 'Unknown'}

                  {/* Phase */}

                    Phase

                      {selectedTask.phase_id ? (
                        phases.find(p => p.id === selectedTask.phase_id)?.name || 'Unknown Phase'
                      ) : (
                        No phase
                      )}

                  {/* Dependencies */}

                      <Link2 size={14} />
                      Dependencies

                    {selectedTask.depends_on && selectedTask.depends_on.length > 0 ? (

                        {getDependencyNames(selectedTask.depends_on).map((name, idx) => (

                            {name}

                        ))}

                    ) : (

No dependencies

                    )}

                  {/* Agent Assignment */}

                      <User size={14} />
                      Agent Assignment

                      {selectedTask.agent_type ? (
                        {selectedTask.agent_type.replace('_', ' ')}
                      ) : (
                        Not assigned
                      )}

                  {/* Iteration Count */}

                      <RefreshCw size={14} />
                      Iteration Count

{selectedTask.iteration_count}

                  {/* Flagged for Review */}

                      <Flag size={14} />
                      Flagged for Review

                      {selectedTask.flagged_for_review ? 'Yes' : 'No'}

                  {/* Time Estimates */}
                  {(selectedTask.estimated_time || selectedTask.actual_time) && (

                        <Clock size={14} />
                        Time

                        {selectedTask.estimated_time &&
Estimated: {selectedTask.estimated_time} min
}
                        {selectedTask.actual_time &&
Actual: {selectedTask.actual_time} min
}

                  )}

                  {/* Created/Updated timestamps */}

Created: {new Date(selectedTask.created_at).toLocaleString()}

Updated: {new Date(selectedTask.updated_at).toLocaleString()}

                </>
              )}

        )}

        {/* Unsaved Changes Warning Dialog */}
        <AlertDialog.Root open={showUnsavedDialog} onOpenChange={setShowUnsavedDialog}>
          <AlertDialog.Portal>
            <AlertDialog.Overlay className="fixed inset-0 bg-black/50 z-50" />
            <AlertDialog.Content className="fixed top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 bg-card border border-border rounded-lg p-4 md:p-6 w-[calc(100%-2rem)] max-w-md max-h-[calc(100vh-2rem)] overflow-y-auto z-50 shadow-xl">
              <AlertDialog.Title className="text-xl font-semibold text-foreground">
                Unsaved Changes
              </AlertDialog.Title>
              <AlertDialog.Description className="mt-3 text-muted-foreground">
                You have unsaved changes. Are you sure you want to discard them?
              </AlertDialog.Description>

                <AlertDialog.Cancel asChild>
                  <button
                    onClick={handleKeepEditing}
                    className="px-4 py-2 text-sm text-secondary-foreground hover:bg-secondary rounded-lg transition-colors"
                  >
                    Keep Editing
                  </button>
                </AlertDialog.Cancel>
                <AlertDialog.Action asChild>
                  <button
                    onClick={handleDiscardChanges}
                    className="px-4 py-2 text-sm bg-destructive hover:bg-destructive/80 text-white rounded-lg transition-colors"
                  >
                    Discard Changes
                  </button>
                </AlertDialog.Action>

            </AlertDialog.Content>
          </AlertDialog.Portal>
        </AlertDialog.Root>

  )
}


<tool_use_error>File has not been read yet. Read it first before writing to it.</tool_use_error>

Error: File has not been read yet. Read it first before writing to it.


Conversation compacted


This session is being continued from a previous conversation that ran out of context. The conversation is summarized below:
Analysis:
Let me analyze the conversation chronologically:

1. **User's Initial Request**: The user wants to add phase grouping functionality to `KanbanBoard.tsx`. They provided specific instructions for 5 changes:
   - The `phaseGrouping` state already exists at line 97
   - Add a new `handlePhaseGroupingChange` handler function after `handleViewModeChange`
   - Update `handleResetFilters` to include phase grouping reset
   - Update `hasActiveFilters` to include `|| phaseGrouping`
   - Add a phase grouping toggle button in the header JSX before the View Mode Toggle

2. **My Approach**: I first read the file to understand its current state. The file is a large React component (~1226 lines) for a Kanban board with tasks, filters, and view modes.

3. **The Core Problem**: Hot reload keeps modifying the file, causing Edit tool calls to fail. The user explicitly warned about this and suggested waiting and re-reading.

4. **Attempts Made**:
   - First read: Successful, file contents cached
   - First edit attempt: Failed with "file was modified" error
   - Waited 1 second, partial read, second edit attempt: Failed
   - Waited 2 seconds, full read, tried Write instead of Edit: Failed with "File has not been read yet"
   - Waited 3 seconds, partial read (10 lines), Write attempt: Failed with same error
   - Full read, immediate Write attempt: Failed with same error

5. **Current State**: I have the complete file content and understand all the changes needed. The file already has:
   - `Layers` imported from lucide-react
   - `phaseGrouping` state at line 97

   The file is MISSING (what needs to be added):
   - `handlePhaseGroupingChange` function (should go after `handleViewModeChange`)
   - `setPhaseGrouping(false)` and `newParams.delete('groupByPhase')` in `handleResetFilters`
   - `|| phaseGrouping` in `hasActiveFilters`
   - The phase grouping toggle button JSX before View Mode Toggle

6. **The Complete File with Changes**: I prepared the full file content with all changes applied. The key additions are:
   - Lines 193-203: New `handlePhaseGroupingChange` function
   - Lines 207-208: Added `setPhaseGrouping(false)` in `handleResetFilters`
   - Line 215: Added `newParams.delete('groupByPhase')`
   - Line 219: Updated `hasActiveFilters` to include `|| phaseGrouping`
   - Lines 500-514: Added Phase Grouping Toggle button JSX

7. **Error Pattern**: The Write tool keeps failing with "File has not been read yet" even after reading. This seems to be a race condition where the hot reload modifies the file between read and write operations, invalidating the read cache.

Summary:
1. Primary Request and Intent:
   The user needs to add phase grouping functionality to the KanbanBoard.tsx file located at `C:/Users/MikeSwanson/AutoBuilder/My-Auto-Builder/frontend/src/pages/KanbanBoard.tsx`. The user explicitly noted that hot reload keeps modifying the file, causing Edit tool failures. They requested 5 specific changes:
   - Acknowledge existing `phaseGrouping` state at line 97
   - Add `handlePhaseGroupingChange` handler function after `handleViewModeChange`
   - Update `handleResetFilters` to reset phase grouping
   - Update `hasActiveFilters` to include `|| phaseGrouping`
   - Add phase grouping toggle button in header JSX before View Mode Toggle

2. Key Technical Concepts:
   - React useState hooks for state management
   - URL search params (useSearchParams) for state persistence
   - TypeScript React component
   - Lucide React icons (Layers icon for the toggle)
   - Hot reload file modification race conditions
   - Kanban board UI with filters, views (kanban/list), and phases

3. Files and Code Sections:
   - `C:/Users/MikeSwanson/AutoBuilder/My-Auto-Builder/frontend/src/pages/KanbanBoard.tsx`
     - Large React component (~1226 lines) managing a Kanban board
     - Already has `Layers` imported and `phaseGrouping` state defined
     - Needs the following additions:

   **New handler function (to be added after line 192):**
   ```typescript
   // Update URL when phase grouping changes
   const handlePhaseGroupingChange = (value: boolean) => {
     setPhaseGrouping(value)
     const newParams = new URLSearchParams(searchParams)
     if (!value) {
       newParams.delete('groupByPhase')
     } else {
       newParams.set('groupByPhase', 'true')
     }
     setSearchParams(newParams)
   }
   ```

   **Updated handleResetFilters (should include):**
   ```typescript
   const handleResetFilters = () => {
     setPriorityFilter('all')
     setStatusFilter('all')
     setAgentTypeFilter('all')
     setSortOrder('newest')
     setPhaseGrouping(false)  // NEW
     setCurrentPage(1)
     const newParams = new URLSearchParams(searchParams)
     newParams.delete('priority')
     newParams.delete('status')
     newParams.delete('agent')
     newParams.delete('sort')
     newParams.delete('groupByPhase')  // NEW
     setSearchParams(newParams)
   }
   ```

   **Updated hasActiveFilters:**
   ```typescript
   const hasActiveFilters = priorityFilter !== 'all' || statusFilter !== 'all' || agentTypeFilter !== 'all' || sortOrder !== 'newest' || phaseGrouping
   ```

   **Phase Grouping Toggle JSX (before View Mode Toggle):**
   ```jsx
   {/* Phase Grouping Toggle */}
   {viewMode === 'kanban' && phases.length > 0 && (
     <button
       onClick={() => handlePhaseGroupingChange(!phaseGrouping)}
       className={`flex items-center gap-2 px-3 py-1.5 text-sm rounded-lg transition-colors ${
         phaseGrouping
           ? 'bg-accent text-white'
           : 'bg-card border border-border text-muted-foreground hover:text-foreground'
       }`}
       title="Group by Phase"
     >
       <Layers size={16} />
       Group by Phase
     </button>
   )}
   ```

4. Errors and fixes:
   - **Edit tool "file was modified" error**: File kept being modified by hot reload between read and edit operations. User warned about this.
     - Attempted fix: Wait with `sleep` command before re-reading
     - Result: Still failed
   - **Write tool "File has not been read yet" error**: Even after reading the file, the Write tool failed, likely because hot reload modified the file again, invalidating the read cache.
     - Attempted fixes: Longer waits (1s, 2s, 3s), immediate write after read
     - Result: All attempts failed - the race condition with hot reload persists

5. Problem Solving:
   - Successfully read and understood the entire file structure
   - Prepared complete file content with all required changes
   - Unable to successfully write changes due to persistent hot reload race condition
   - The core issue is that hot reload modifies the file faster than the read-write cycle can complete

6. All user messages:
   - User's detailed request to add phase grouping functionality with 5 specific changes
   - User warned about hot reload issues: "The file keeps being modified by hot reload so regular Edit tool calls fail"
   - User suggested: "If the Edit tool fails due to file modification, try waiting a second and reading the file again before editing"

7. Pending Tasks:
   - Successfully write the changes to KanbanBoard.tsx
   - The complete modified file content is prepared but not yet written

8. Current Work:
   I was attempting to write the complete modified KanbanBoard.tsx file with all phase grouping changes. The last attempt was a full file read followed immediately by a Write operation, but it failed with "File has not been read yet" error. The hot reload is causing a race condition that invalidates the file read cache before the write can complete.

9. Optional Next Step:
   Try alternative approaches to overcome the hot reload issue:
   - Stop the dev server temporarily to prevent hot reload
   - Use a bash command to write the file directly (bypassing the Write tool)
   - Try multiple rapid read-write cycles

   User's exact request: "Try to make these edits. If the Edit tool fails due to file modification, try waiting a second and reading the file again before editing."

   The complete file content with all changes is prepared and ready to be written once the hot reload race condition can be overcome..

If you need specific details from before compaction (like exact code snippets, error messages, or content you generated), read the full transcript at: C:\Users\MikeSwanson\.claude\projects\C--Users-MikeSwanson-AutoBuilder-My-Auto-Builder\415a52d7-00db-40bd-a68e-2d70c815213a.jsonl
Please continue the conversation from where we left it off without asking the user any further questions. Continue with the last task that you were asked to work on.


I'll continue trying to add the phase grouping functionality to KanbanBoard.tsx. Given the hot reload race condition issues, let me first read the current state of the file and then attempt the edits.