#!/bin/bash
#
# Claude Code Hook: user-prompt-submit
# Runs BEFORE each user message is processed
# Injects relevant context from the database into the conversation
#
# Expected environment variables:
#   CLAUDE_PROJECT_ID - UUID of the current project
#   JWT_TOKEN - Authentication token for API
#   CLAUDE_API_URL - API base URL (default: http://localhost:8000)
#   CONTEXT_RECALL_ENABLED - Set to "false" to disable (default: true)
#   MIN_RELEVANCE_SCORE - Minimum score for context (default: 5.0)
#   MAX_CONTEXTS - Maximum number of contexts to retrieve (default: 10)
#

# Load configuration if exists
CONFIG_FILE="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)/context-recall-config.env"
if [ -f "$CONFIG_FILE" ]; then
    source "$CONFIG_FILE"
fi

# Default values
API_URL="${CLAUDE_API_URL:-http://localhost:8000}"
ENABLED="${CONTEXT_RECALL_ENABLED:-true}"
MIN_SCORE="${MIN_RELEVANCE_SCORE:-5.0}"
MAX_ITEMS="${MAX_CONTEXTS:-10}"

# Exit early if disabled
if [ "$ENABLED" != "true" ]; then
    exit 0
fi

# Detect project ID from git repo if not set
if [ -z "$CLAUDE_PROJECT_ID" ]; then
    # Try to get from git config
    PROJECT_ID=$(git config --local claude.projectid 2>/dev/null)

    if [ -z "$PROJECT_ID" ]; then
        # Try to derive from git remote URL
        GIT_REMOTE=$(git config --get remote.origin.url 2>/dev/null)
        if [ -n "$GIT_REMOTE" ]; then
            # Hash the remote URL to create a consistent ID
            PROJECT_ID=$(echo -n "$GIT_REMOTE" | md5sum | cut -d' ' -f1)
        fi
    fi
else
    PROJECT_ID="$CLAUDE_PROJECT_ID"
fi

# Exit if no project ID available
if [ -z "$PROJECT_ID" ]; then
    # Silent exit - no context available
    exit 0
fi

# Exit if no JWT token
if [ -z "$JWT_TOKEN" ]; then
    exit 0
fi

# Build API request URL
RECALL_URL="${API_URL}/api/conversation-contexts/recall"
QUERY_PARAMS="project_id=${PROJECT_ID}&limit=${MAX_ITEMS}&min_relevance_score=${MIN_SCORE}"

# Fetch context from API (with timeout and error handling)
CONTEXT_RESPONSE=$(curl -s --max-time 3 \
    "${RECALL_URL}?${QUERY_PARAMS}" \
    -H "Authorization: Bearer ${JWT_TOKEN}" \
    -H "Accept: application/json" 2>/dev/null)

# Check if request was successful
if [ $? -ne 0 ] || [ -z "$CONTEXT_RESPONSE" ]; then
    # Silent failure - API unavailable
    exit 0
fi

# Parse and format context (expects JSON array of context objects)
# Example response: [{"title": "...", "dense_summary": "...", "relevance_score": 8.5}, ...]
CONTEXT_COUNT=$(echo "$CONTEXT_RESPONSE" | grep -o '"id"' | wc -l)

if [ "$CONTEXT_COUNT" -gt 0 ]; then
    echo "<!-- Context Recall: Retrieved $CONTEXT_COUNT relevant context(s) -->"
    echo ""
    echo "## 📚 Previous Context"
    echo ""
    echo "The following context has been automatically recalled from previous sessions:"
    echo ""

    # Extract and format each context entry
    # Note: This uses simple text parsing. For production, consider using jq if available.
    echo "$CONTEXT_RESPONSE" | python3 -c "
import sys, json
try:
    contexts = json.load(sys.stdin)
    if isinstance(contexts, list):
        for i, ctx in enumerate(contexts, 1):
            title = ctx.get('title', 'Untitled')
            summary = ctx.get('dense_summary', '')
            score = ctx.get('relevance_score', 0)
            ctx_type = ctx.get('context_type', 'unknown')

            print(f'### {i}. {title} (Score: {score}/10)')
            print(f'*Type: {ctx_type}*')
            print()
            print(summary)
            print()
            print('---')
            print()
except:
    pass
" 2>/dev/null

    echo ""
    echo "*This context was automatically injected to help maintain continuity across sessions.*"
    echo ""
fi

# Exit successfully
exit 0