#!/usr/bin/env bash
# drive-map.sh — create/repoint Windows network drive maps + share shortcuts on a
# remote endpoint via GuruRMM, run in the user's session so they actually appear.
# See SKILL.md for the why. Verbs: verify | cred | map | shortcut | unmap | migrate.
set -uo pipefail
REPO="$(git rev-parse --show-toplevel 2>/dev/null || echo .)"
VAULT="$REPO/.claude/scripts/vault.sh"
logerr(){ bash "$REPO/.claude/scripts/log-skill-error.sh" "drive-map" "$1" --context "${2:-}" >/dev/null 2>&1 || true; }
die(){ echo "[ERROR] $1" >&2; exit "${2:-2}"; }

VERB="${1:-}"; shift || true
[ -n "$VERB" ] || die "usage: drive-map.sh <verify|cred|map|shortcut|unmap|migrate> --host <name> [opts]"

HOST=""; SERVER=""; TARGET=""; LETTER=""; NAME=""; CRED_USER=""; CRED_VAULT=""
CRED_FIELD="credentials.password"; REMOVE_OLD=""; QUICK=0; PERSIST="yes"
PROFILE_HINT=""; DRYRUN=0; TIMEOUT=90
while [ $# -gt 0 ]; do
  case "$1" in
    --host) HOST="${2:?}"; shift 2;;
    --server) SERVER="${2:?}"; shift 2;;
    --target) TARGET="${2:?}"; shift 2;;
    --letter) LETTER="${2:?}"; LETTER="${LETTER%%:}"; shift 2;;
    --name) NAME="${2:?}"; shift 2;;
    --cred-user) CRED_USER="${2:?}"; shift 2;;
    --cred-vault) CRED_VAULT="${2:?}"; shift 2;;
    --cred-field) CRED_FIELD="${2:?}"; shift 2;;
    --remove-old) REMOVE_OLD="${2:?}"; shift 2;;
    --quick-access) QUICK=1; shift;;
    --no-persistent) PERSIST="no"; shift;;
    --profile-hint) PROFILE_HINT="${2:?}"; shift 2;;
    --dry-run) DRYRUN=1; shift;;
    --timeout) TIMEOUT="${2:?}"; shift 2;;
    *) die "unknown option: $1";;
  esac
done
[ -n "$HOST" ] || die "--host is required"

# Normalize a UNC: strip any/all leading backslashes, force exactly two. Shell-arg
# layers (Git-bash on Windows) collapse a leading "\\" to "\", which breaks the host
# parse; this makes the tool robust to 0/1/2 leading backslashes on input.
norm_unc(){ [ -n "$1" ] || return 0; printf '\\\\%s' "$(printf '%s' "$1" | sed -E 's#^\\+##')"; }
# host portion of a UNC: \\HOST\share\... -> HOST
unc_host(){ printf '%s' "$1" | sed -E 's#^\\+##; s#\\.*##'; }
# leaf of a UNC path: \\h\share\a\b -> b
unc_leaf(){ printf '%s' "$1" | sed 's#\\*$##; s#.*\\##'; }
SERVER="$(norm_unc "$SERVER")"; TARGET="$(norm_unc "$TARGET")"; REMOVE_OLD="$(norm_unc "$REMOVE_OLD")"

# ---- resolve the credential password (vault only; never plaintext on CLI) ----
CRED_PASS=""
if [ -n "$CRED_USER" ]; then
  [ -n "$CRED_VAULT" ] || die "--cred-user given but no --cred-vault to read the password from"
  CRED_PASS="$(bash "$VAULT" get-field "$CRED_VAULT" "$CRED_FIELD" 2>/dev/null)"
  [ -n "$CRED_PASS" ] || { logerr "vault read empty for $CRED_VAULT:$CRED_FIELD" "host=$HOST"; die "could not read password at vault:$CRED_VAULT field:$CRED_FIELD"; }
fi

# ---- generate the endpoint PowerShell for the verb (all user_session) ----
# PS variable values are injected via single-quoted PS literals; we escape any
# embedded single quote by doubling it (PS rule). Password is masked in all output.
psq(){ printf "'%s'" "$(printf '%s' "$1" | sed "s/'/''/g")"; }

build_ps(){
  local ps=""
  # append one PS line with a REAL newline. Never use printf %b here: UNC paths
  # contain backslashes (\c, \S) that %b would eat as escapes and truncate output.
  add(){ ps+="$1"$'\n'; }
  add "\$ErrorActionPreference='Continue'"
  add "\$who = (Get-CimInstance Win32_ComputerSystem).UserName; if(-not \$who){ Write-Host '[WARN] no interactive user resolved; user-session ops may no-op' }"
  add "Write-Host (\"[INFO] running as: \$env:USERNAME  active: \$who\")"

  # remove-old: strip stale shortcuts/letter/cred pointing at the old prefix
  if [ -n "$REMOVE_OLD" ] && { [ "$VERB" = "migrate" ] || [ "$VERB" = "unmap" ]; }; then
    local oldhost; oldhost="$(unc_host "$REMOVE_OLD")"
    add "\$old=$(psq "$REMOVE_OLD")"
    add "\$desk=[Environment]::GetFolderPath('Desktop')"
    add "\$wsh=New-Object -ComObject WScript.Shell"
    add "Get-ChildItem \$desk -Filter *.lnk -EA SilentlyContinue | ForEach-Object { \$t=\$wsh.CreateShortcut(\$_.FullName).TargetPath; if(\$t -like (\$old+'*')){ Remove-Item \$_.FullName -Force -EA SilentlyContinue; Write-Host (\"[OK] removed stale shortcut: \"+\$_.Name+\" -> \"+\$t) } }"
    add "cmdkey /delete:$oldhost *>\$null; Write-Host '[OK] cleared old cmdkey: $oldhost'"
    [ -n "$LETTER" ] && add "net use ${LETTER}: /delete /y *>\$null"
  fi

  # cred: store per-host credential
  if [ -n "$CRED_USER" ] && { [ "$VERB" = "cred" ] || [ "$VERB" = "map" ] || [ "$VERB" = "migrate" ]; }; then
    local credhost=""
    [ -n "$SERVER" ] && credhost="$(unc_host "$SERVER")"
    [ -z "$credhost" ] && [ -n "$TARGET" ] && credhost="$(unc_host "$TARGET")"
    [ -n "$credhost" ] || die "cred needs --server or --target to derive the server host"
    add "cmdkey /add:$credhost /user:$(psq "$CRED_USER") /pass:$(psq "$CRED_PASS") | Out-Null"
    add "Write-Host '[OK] stored credential for $credhost as $CRED_USER'"
  fi

  # map: persistent drive letter
  if [ "$VERB" = "map" ]; then
    [ -n "$SERVER" ] || die "map needs --server"
    [ -n "$LETTER" ] || die "map needs --letter"
    add "net use ${LETTER}: /delete /y *>\$null"
    add "\$r = net use ${LETTER}: $(psq "$SERVER") /persistent:$PERSIST 2>&1; Write-Host (\"\$r\")"
    add "if(Test-Path ${LETTER}:\\){ Write-Host '[OK] mapped ${LETTER}: -> $SERVER' } else { Write-Host '[FAIL] map ${LETTER}: failed'; exit 1 }"
  fi

  # migrate may also map a letter if both server+letter given
  if [ "$VERB" = "migrate" ] && [ -n "$SERVER" ] && [ -n "$LETTER" ]; then
    add "net use ${LETTER}: /delete /y *>\$null"
    add "\$r = net use ${LETTER}: $(psq "$SERVER") /persistent:$PERSIST 2>&1; Write-Host (\"\$r\")"
    add "if(Test-Path ${LETTER}:\\){ Write-Host '[OK] mapped ${LETTER}: -> $SERVER' } else { Write-Host '[WARN] map ${LETTER}: did not verify' }"
  fi

  # shortcut: desktop .lnk (+ optional quick access)
  if [ -n "$TARGET" ] && { [ "$VERB" = "shortcut" ] || [ "$VERB" = "migrate" ]; }; then
    local lname; lname="${NAME:-$(unc_leaf "$TARGET")}"
    add "\$desk2=[Environment]::GetFolderPath('Desktop')"
    add "\$wsh2=New-Object -ComObject WScript.Shell"
    add "\$lp=Join-Path \$desk2 ($(psq "$lname")+'.lnk')"
    add "\$lnk=\$wsh2.CreateShortcut(\$lp); \$lnk.TargetPath=$(psq "$TARGET"); \$lnk.Save()"
    add "Write-Host ('[OK] shortcut: '+\$lp+' -> $TARGET')"
    if [ "$QUICK" = "1" ]; then
      add "try { \$sa=New-Object -ComObject Shell.Application; \$sa.Namespace($(psq "$TARGET")).Self.InvokeVerb('pintohome'); Write-Host '[OK] pinned to Quick Access' } catch { Write-Host '[WARN] Quick Access pin failed (non-fatal)' }"
    fi
  fi

  # verify: target reachable from this user
  if [ -n "$TARGET" ] && { [ "$VERB" = "verify" ] || [ "$VERB" = "migrate" ]; }; then
    add "if(Test-Path -LiteralPath $(psq "$TARGET")){ Write-Host '[OK] reachable: $TARGET' } else { Write-Host '[FAIL] NOT reachable: $TARGET'; exit 1 }"
  elif [ "$VERB" = "verify" ] && [ -n "$LETTER" ]; then
    add "if(Test-Path ${LETTER}:\\){ Write-Host '[OK] reachable: ${LETTER}:' } else { Write-Host '[FAIL] NOT reachable: ${LETTER}:'; exit 1 }"
  fi
  printf '%s' "$ps"
}

PS_SCRIPT="$(build_ps)"
[ -n "$PS_SCRIPT" ] || die "verb '$VERB' produced no actions — check options"

if [ "$DRYRUN" = "1" ]; then
  echo "[DRY-RUN] would dispatch to $HOST (user_session), timeout ${TIMEOUT}s:"
  echo "------------------------------------------------------------"
  # mask the password in the preview
  if [ -n "$CRED_PASS" ]; then printf '%s\n' "$PS_SCRIPT" | sed "s/$(printf '%s' "$CRED_PASS" | sed 's/[.[\*^$()+?{|]/\\&/g')/********/g"; else printf '%s\n' "$PS_SCRIPT"; fi
  echo "------------------------------------------------------------"
  exit 0
fi

# ---- RMM auth + agent resolution ----
eval "$(bash "$REPO/.claude/scripts/rmm-auth.sh")" >/dev/null 2>&1 || { logerr "rmm auth failed"; die "RMM auth failed"; }
AGENTS="$(curl -s "$RMM/api/agents" -H "Authorization: Bearer $TOKEN")"
AGENT="$(echo "$AGENTS" | jq --arg h "$HOST" '[.[] | select(.hostname|ascii_downcase|contains($h|ascii_downcase))] | .[0]')"
AID="$(echo "$AGENT" | jq -r '.id // empty')"
AHOST="$(echo "$AGENT" | jq -r '.hostname // empty')"
AOS="$(echo "$AGENT" | jq -r '.os_type // empty')"
ACONN="$(echo "$AGENT" | jq -r '.is_connected // false')"
[ -n "$AID" ] || { logerr "agent not found: $HOST"; die "no RMM agent matching '$HOST'"; }
[ "$AOS" = "windows" ] || die "agent $AHOST is os_type=$AOS — drive-map is Windows-only"
echo "[INFO] target: $AHOST (id=$AID, connected=$ACONN) verb=$VERB"
[ "$ACONN" = "true" ] || echo "[WARN] agent offline — command will queue until it reconnects"

PAYLOAD="$(jq -n --arg ct powershell --arg cmd "$PS_SCRIPT" --argjson to "$TIMEOUT" \
  '{command_type:$ct, command:$cmd, timeout_seconds:$to, context:"user_session"}')"
CMD_ID="$(curl -s -X POST "$RMM/api/agents/$AID/command" -H "Authorization: Bearer $TOKEN" -H "Content-Type: application/json" -d "$PAYLOAD" | jq -r '.command_id // empty')"
[ -n "$CMD_ID" ] || { logerr "dispatch failed" "host=$AHOST verb=$VERB"; die "dispatch failed"; }
echo "[INFO] dispatched cmd=$CMD_ID (user_session)"

S=""; R=""
for i in $(seq 1 30); do
  R="$(curl -s "$RMM/api/commands/$CMD_ID" -H "Authorization: Bearer $TOKEN")"
  S="$(echo "$R" | jq -r '.status')"
  { [ "$S" = "completed" ] || [ "$S" = "failed" ] || [ "$S" = "cancelled" ] || [ "$S" = "interrupted" ]; } && break
  sleep 4
done
echo "[INFO] status=$S exit=$(echo "$R" | jq -r '.exit_code // "—"')"
echo "--- stdout ---"; echo "$R" | jq -r '.stdout // ""'
STDERR="$(echo "$R" | jq -r '.stderr // ""')"
[ -n "$STDERR" ] && { echo "--- stderr ---"; echo "$STDERR"; }

# alert per RMM convention (write op only)
if [ "$VERB" != "verify" ]; then
  bash "$REPO/.claude/scripts/post-bot-alert.sh" "[RMM] drive-map $VERB on $AHOST -> ${TARGET:-$SERVER} (status=$S)" >/dev/null 2>&1 || true
fi

case "$S" in
  completed) exit 0;;
  failed) logerr "drive-map $VERB failed on $AHOST" "cmd=$CMD_ID"; exit 1;;
  *) logerr "drive-map $VERB ended status=$S on $AHOST" "cmd=$CMD_ID"; exit 1;;
esac