#!/usr/bin/env bash
# ═══════════════════════════════════════════════════════════════════
#  Downloads Auto-Uploader — macOS launchd installer
#  Runs downloads_uploader.py every 5 minutes in the background.
#
#  Usage:
#    ./downloads_uploader_install.sh install    # register & start
#    ./downloads_uploader_install.sh uninstall  # stop & remove
#    ./downloads_uploader_install.sh status     # show current state
#    ./downloads_uploader_install.sh run        # manual one-shot run
# ═══════════════════════════════════════════════════════════════════

set -euo pipefail

LABEL="com.user.downloads-uploader"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
SCAN_DIR="$(dirname "$SCRIPT_DIR")"          # parent of uploader/ = Downloads/
PYTHON_SCRIPT="$SCRIPT_DIR/downloads_uploader.py"
PLIST_DIR="$HOME/Library/LaunchAgents"
PLIST_FILE="$PLIST_DIR/$LABEL.plist"
LOG_OUT="$SCRIPT_DIR/uploader_stdout.log"
LOG_ERR="$SCRIPT_DIR/uploader_stderr.log"
INTERVAL=300  # seconds (5 minutes)

# macOS shows the executable name in permission dialogs, not the script name.
# To display "downloads-uploader" instead of "python3.13", we create a symlink
# named "downloads-uploader" pointing to the real python3 binary, and use that
# symlink in the launchd plist.
SYMLINK_DIR="$HOME/.local/bin"
SYMLINK="$SYMLINK_DIR/downloads-uploader"

# Detect python3
PYTHON=$(command -v python3 || command -v python || echo "")
if [[ -z "$PYTHON" ]]; then
  echo "❌  python3 not found. Install it: brew install python"
  exit 1
fi

# ───────────────────────────────────────────────
generate_plist() {
cat <<PLIST
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"
  "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>Label</key>
    <string>$LABEL</string>

    <key>ProgramArguments</key>
    <array>
        <string>$SYMLINK</string>
        <string>$PYTHON_SCRIPT</string>
    </array>

    <key>StartInterval</key>
    <integer>$INTERVAL</integer>

    <key>RunAtLoad</key>
    <true/>

    <!-- Pin the working directory so __file__ resolves correctly -->
    <key>WorkingDirectory</key>
    <string>$SCRIPT_DIR</string>

    <key>StandardOutPath</key>
    <string>$LOG_OUT</string>

    <key>StandardErrorPath</key>
    <string>$LOG_ERR</string>

    <key>KeepAlive</key>
    <false/>
</dict>
</plist>
PLIST
}

# ───────────────────────────────────────────────
cmd_install() {
  echo "📦  Installing Downloads Auto-Uploader..."

  if [[ ! -f "$PYTHON_SCRIPT" ]]; then
    echo "❌  Script not found: $PYTHON_SCRIPT"
    exit 1
  fi

  # Create named symlink so macOS shows "downloads-uploader" in permission dialogs
  mkdir -p "$SYMLINK_DIR"
  if [[ -L "$SYMLINK" || -e "$SYMLINK" ]]; then
    rm -f "$SYMLINK"
  fi
  ln -s "$PYTHON" "$SYMLINK"
  echo "✅  Symlink created: $SYMLINK → $PYTHON"
  echo "    (macOS permission dialogs will now show 'downloads-uploader')"

  # Write the absolute scan_directory into the config so launchd's cwd=/
  # never affects path resolution inside the Python script.
  "$PYTHON" - "$SCRIPT_DIR" "$SCAN_DIR" <<'PYEOF'
import json, sys
cfg_path = sys.argv[1] + "/downloads_uploader_config.json"
scan_dir = sys.argv[2]
with open(cfg_path) as f:
    cfg = json.load(f)
cfg["scan_directory"] = scan_dir
with open(cfg_path, "w") as f:
    json.dump(cfg, f, indent=2, ensure_ascii=False)
print(f"  scan_directory set to: {scan_dir}")
PYEOF
  echo "✅  Config updated with absolute scan_directory"

  mkdir -p "$PLIST_DIR"
  generate_plist > "$PLIST_FILE"
  echo "✅  Plist written: $PLIST_FILE"

  # Unload first if already loaded
  launchctl unload "$PLIST_FILE" 2>/dev/null || true
  launchctl load -w "$PLIST_FILE"
  echo "✅  Agent loaded. Script will run every $((INTERVAL / 60)) minutes."
  echo "    Logs → $LOG_OUT"
}

cmd_uninstall() {
  echo "🗑   Uninstalling Downloads Auto-Uploader..."
  if [[ -f "$PLIST_FILE" ]]; then
    launchctl unload -w "$PLIST_FILE" 2>/dev/null || true
    rm -f "$PLIST_FILE"
    echo "✅  Removed $PLIST_FILE"
  else
    echo "ℹ️   Plist not found — already uninstalled."
  fi
  if [[ -L "$SYMLINK" ]]; then
    rm -f "$SYMLINK"
    echo "✅  Removed symlink $SYMLINK"
  fi
}

cmd_status() {
  echo "── Status ────────────────────────────────"
  if launchctl list | grep -q "$LABEL"; then
    echo "✅  Agent is RUNNING (label: $LABEL)"
    launchctl list "$LABEL" 2>/dev/null || true
  else
    echo "⏹   Agent is NOT loaded."
  fi
  echo ""
  echo "── Files ─────────────────────────────────"
  echo "  Script dir : $SCRIPT_DIR"
  echo "  Scan dir   : $(dirname "$SCRIPT_DIR")"
  echo "  Config     : $SCRIPT_DIR/downloads_uploader_config.json"
  echo "  State      : $SCRIPT_DIR/.uploader_state.json"
  echo "  App log    : $SCRIPT_DIR/uploader_log.txt"
  echo "  Stdout log : $LOG_OUT"
  echo "  Stderr log : $LOG_ERR"
  echo ""
  echo "── Recent activity (uploader_log.txt) ────"
  LOG_MAIN="$SCRIPT_DIR/uploader_log.txt"
  [[ -f "$LOG_MAIN" ]] && tail -25 "$LOG_MAIN" || echo "(no log yet)"
}

cmd_run() {
  echo "▶   Running uploader now (one-shot)..."
  "$PYTHON" "$PYTHON_SCRIPT"
}

# ───────────────────────────────────────────────
case "${1:-help}" in
  install)   cmd_install   ;;
  uninstall) cmd_uninstall ;;
  status)    cmd_status    ;;
  run)       cmd_run       ;;
  *)
    echo "Usage: $0 {install|uninstall|status|run}"
    echo ""
    echo "  install    Register the launchd agent (runs every 5 min)"
    echo "  uninstall  Remove the launchd agent"
    echo "  status     Show if the agent is running + recent log"
    echo "  run        Run the uploader once right now"
    ;;
esac