#!/usr/bin/env bash
# WTM Sync - Cross-machine state synchronization
set -euo pipefail
source "${HOME}/.wtm/lib/common.sh"
source "${HOME}/.wtm/lib/sync.sh"

case "${1:-help}" in
  init)
    shift
    if [[ $# -lt 1 ]]; then
      echo "Usage: wtm sync init <project>"
      exit 1
    fi
    sync_init "$1"
    ;;
  push)
    shift
    if [[ $# -lt 1 ]]; then
      echo "Usage: wtm sync push <project>"
      exit 1
    fi
    sync_push "$1"
    ;;
  pull)
    shift
    if [[ $# -lt 2 ]]; then
      echo "Usage: wtm sync pull <project> <from-machine>"
      exit 1
    fi
    sync_pull "$1" "$2"
    ;;
  merge)
    shift
    if [[ $# -lt 3 ]]; then
      echo "Usage: wtm sync merge <project> <from-machine> <session-id>"
      exit 1
    fi
    sync_merge_session "$1" "$2" "$3"
    ;;
  status)
    shift
    if [[ $# -lt 1 ]]; then
      echo "Usage: wtm sync status <project>"
      exit 1
    fi
    echo ""
    echo "  Sync status for: $1"
    echo "  ─────────────────────────────"
    local_machine=$(get_machine_id)
    echo "  Local machine: ${local_machine}"
    sync_dir="${WTM_HOME}/sync-worktree/$1"
    if [[ -d "${sync_dir}" ]]; then
      echo "  Sync worktree: ${sync_dir}"
      if [[ -d "${sync_dir}/.git" ]] || [[ -f "${sync_dir}/.git" ]]; then
        last_commit=$(git -C "${sync_dir}" log -1 --format="%h %s (%cr)" 2>/dev/null || echo "no commits")
        echo "  Last sync: ${last_commit}"
      fi
    else
      echo "  Sync not initialized. Run: wtm sync init $1"
    fi
    echo ""
    echo "  Known machines:"
    list_machines
    ;;
  help|--help|-h)
    cat <<'EOF'
Usage:
  wtm sync init <project>                         Initialize sync
  wtm sync push <project>                         Push state to remote
  wtm sync pull <project> <from-machine>           Pull state from machine
  wtm sync merge <project> <from-machine> <sid>    Merge specific session
  wtm sync status <project>                        Show sync status
EOF
    ;;
  *)
    log_error "Unknown sync command: $1"
    exit 1
    ;;
esac