import click
import asyncio
import os
import sys
import signal
import json
import time
from datetime import datetime, timedelta
from pathlib import Path
from rich.progress import Progress, SpinnerColumn, MofNCompleteColumn

from src.utils.mail_utils.helpers import ensure_directory_exists
from src.utils.calendar_utils import save_events_to_vdir, save_events_to_file
from src.utils.notifications import notify_new_emails
from src.services.microsoft_graph.calendar import (
    fetch_calendar_events,
    sync_local_calendar_changes,
    get_last_sync_time,
    detect_deleted_events,
)
from src.services.microsoft_graph.mail import (
    fetch_mail_async,
    fetch_archive_mail_async,
    archive_mail_async,
    delete_mail_async,
    synchronize_maildir_async,
    process_outbox_async,
)
from src.services.microsoft_graph.auth import get_access_token
from src.services.godspeed.client import GodspeedClient
from src.services.godspeed.sync import GodspeedSync


# Timing state management
def get_sync_state_file():
    """Get the path to the sync state file."""
    return os.path.expanduser("~/.local/share/luk/sync_state.json")


def load_sync_state():
    """Load the sync state from file."""
    state_file = get_sync_state_file()
    if os.path.exists(state_file):
        try:
            with open(state_file, "r") as f:
                return json.load(f)
        except Exception:
            pass
    return {
        "last_godspeed_sync": 0,
        "last_sweep_date": None,
        "sweep_completed_today": False,
    }


def save_sync_state(state):
    """Save the sync state to file."""
    state_file = get_sync_state_file()
    os.makedirs(os.path.dirname(state_file), exist_ok=True)
    with open(state_file, "w") as f:
        json.dump(state, f, indent=2)


def should_run_godspeed_sync():
    """Check if Godspeed sync should run (every 15 minutes)."""
    state = load_sync_state()
    current_time = time.time()
    last_sync = state.get("last_godspeed_sync", 0)
    return current_time - last_sync >= 900  # 15 minutes in seconds


def should_run_sweep():
    """Check if sweep should run (once after 6pm each day)."""
    state = load_sync_state()
    current_time = datetime.now()

    # Check if it's after 6 PM
    if current_time.hour < 18:
        return False

    # Check if we've already swept today
    today_str = current_time.strftime("%Y-%m-%d")
    last_sweep_date = state.get("last_sweep_date")

    return last_sweep_date != today_str


def get_godspeed_sync_directory():
    """Get Godspeed sync directory from environment or default."""
    sync_dir = os.getenv("GODSPEED_SYNC_DIR")
    if sync_dir:
        return Path(sync_dir)

    # Default to ~/Documents/Godspeed or ~/.local/share/gtd-terminal-tools/godspeed
    home = Path.home()

    # Try Documents first
    docs_dir = home / "Documents" / "Godspeed"
    if docs_dir.parent.exists():
        return docs_dir

    # Fall back to data directory
    data_dir = home / ".local" / "share" / "luk" / "godspeed"
    return data_dir


def get_godspeed_credentials():
    """Get Godspeed credentials from environment."""
    email = os.getenv("GODSPEED_EMAIL")
    password = os.getenv("GODSPEED_PASSWORD")
    token = os.getenv("GODSPEED_TOKEN")
    return email, password, token


async def run_godspeed_sync(progress=None):
    """Run Godspeed bidirectional sync."""
    try:
        email, password, token = get_godspeed_credentials()
        if not (token or (email and password)):
            if progress:
                progress.console.print(
                    "[yellow]⚠️  Skipping Godspeed sync: No credentials configured[/yellow]"
                )
            return False

        sync_dir = get_godspeed_sync_directory()

        if progress:
            progress.console.print(
                f"[cyan]🔄 Running Godspeed sync to {sync_dir}...[/cyan]"
            )

        client = GodspeedClient(email=email, password=password, token=token)
        sync_engine = GodspeedSync(client, sync_dir)
        sync_engine.sync_bidirectional()

        # Update sync state
        state = load_sync_state()
        state["last_godspeed_sync"] = time.time()
        save_sync_state(state)

        if progress:
            progress.console.print("[green]✅ Godspeed sync completed[/green]")
        return True

    except Exception as e:
        if progress:
            progress.console.print(f"[red]❌ Godspeed sync failed: {e}[/red]")
        return False


async def run_task_sweep(progress=None):
    """Run task sweep from notes directory to Godspeed inbox."""
    try:
        from src.cli.godspeed import TaskSweeper

        notes_dir_env = os.getenv("NOTES_DIR")
        if not notes_dir_env:
            if progress:
                progress.console.print(
                    "[yellow]⚠️  Skipping task sweep: $NOTES_DIR not configured[/yellow]"
                )
            return False

        notes_dir = Path(notes_dir_env)
        if not notes_dir.exists():
            if progress:
                progress.console.print(
                    f"[yellow]⚠️  Skipping task sweep: Notes directory does not exist: {notes_dir}[/yellow]"
                )
            return False

        godspeed_dir = get_godspeed_sync_directory()

        if progress:
            progress.console.print(
                f"[cyan]🧹 Running task sweep from {notes_dir} to {godspeed_dir}...[/cyan]"
            )

        sweeper = TaskSweeper(notes_dir, godspeed_dir, dry_run=False)
        result = sweeper.sweep_tasks()

        # Update sweep state
        state = load_sync_state()
        state["last_sweep_date"] = datetime.now().strftime("%Y-%m-%d")
        save_sync_state(state)

        if result["swept_tasks"] > 0:
            if progress:
                progress.console.print(
                    f"[green]✅ Task sweep completed: {result['swept_tasks']} tasks swept[/green]"
                )
        else:
            if progress:
                progress.console.print(
                    "[green]✅ Task sweep completed: No tasks to sweep[/green]"
                )
        return True

    except Exception as e:
        if progress:
            progress.console.print(f"[red]❌ Task sweep failed: {e}[/red]")
        return False


# Function to create Maildir structure
def create_maildir_structure(base_path):
    """
    Create the standard Maildir directory structure.

    Args:
        base_path (str): Base path for the Maildir.

    Returns:
        None
    """
    ensure_directory_exists(os.path.join(base_path, "cur"))
    ensure_directory_exists(os.path.join(base_path, "new"))
    ensure_directory_exists(os.path.join(base_path, "tmp"))
    ensure_directory_exists(os.path.join(base_path, ".Archive", "cur"))
    ensure_directory_exists(os.path.join(base_path, ".Archive", "new"))
    ensure_directory_exists(os.path.join(base_path, ".Archive", "tmp"))
    ensure_directory_exists(os.path.join(base_path, ".Trash", "cur"))
    # Create outbox structure for sending emails
    ensure_directory_exists(os.path.join(base_path, "outbox", "new"))
    ensure_directory_exists(os.path.join(base_path, "outbox", "cur"))
    ensure_directory_exists(os.path.join(base_path, "outbox", "tmp"))
    ensure_directory_exists(os.path.join(base_path, "outbox", "failed"))


async def fetch_calendar_async(
    headers,
    progress,
    task_id,
    dry_run,
    vdir_path,
    ics_path,
    org_name,
    days_back,
    days_forward,
    continue_iteration,
):
    """
    Fetch calendar events and save them in the appropriate format.

    Args:
        headers: Authentication headers for Microsoft Graph API
        progress: Progress instance for updating progress bars
        task_id: ID of the task in the progress bar

    Returns:
        List of event dictionaries

    Raises:
        Exception: If there's an error fetching or saving events
    """
    try:
        # Use the utility function to fetch calendar events
        progress.console.print(
            "[cyan]Fetching events from Microsoft Graph API...[/cyan]"
        )
        events, total_events = await fetch_calendar_events(
            headers=headers, days_back=days_back, days_forward=days_forward
        )

        progress.console.print(
            f"[cyan]Got {len(events)} events from API (reported total: {total_events})[/cyan]"
        )

        # Update progress bar with total events
        progress.update(task_id, total=total_events)

        # Define org_vdir_path up front if vdir_path is specified
        org_vdir_path = os.path.join(vdir_path, org_name) if vdir_path else None

        # Save events to appropriate format
        if not dry_run:
            if vdir_path and org_vdir_path:
                progress.console.print(
                    f"[cyan]Saving events to vdir: {org_vdir_path}[/cyan]"
                )
                save_events_to_vdir(events, org_vdir_path, progress, task_id, dry_run)
                progress.console.print(
                    f"[green]Finished saving events to vdir: {org_vdir_path}[/green]"
                )
            elif ics_path:
                # Save to a single ICS file in the output_ics directory
                progress.console.print(
                    f"[cyan]Saving events to ICS file: {ics_path}/events_latest.ics[/cyan]"
                )
                save_events_to_file(
                    events, f"{ics_path}/events_latest.ics", progress, task_id, dry_run
                )
                progress.console.print(
                    "[green]Finished saving events to ICS file[/green]"
                )
            else:
                # No destination specified
                progress.console.print(
                    "[yellow]Warning: No destination path (--vdir or --icsfile) specified for calendar events.[/yellow]"
                )
        else:
            progress.console.print(
                f"[DRY-RUN] Would save {len(events)} events to {
                    'vdir format' if vdir_path else 'single ICS file'
                }"
            )
            progress.update(task_id, advance=len(events))

        # Interactive mode: Ask if the user wants to continue with the next date range
        if continue_iteration:
            # Move to the next date range
            next_start_date = datetime.now() - timedelta(days=days_back)
            next_end_date = next_start_date + timedelta(days=days_forward)

            progress.console.print(
                f"\nCurrent date range: {next_start_date.strftime('%Y-%m-%d')} to {
                    next_end_date.strftime('%Y-%m-%d')
                }"
            )

            user_response = (
                click.prompt("\nContinue to iterate? [y/N]", default="N")
                .strip()
                .lower()
            )

            while user_response == "y":
                progress.console.print(
                    f"\nFetching events for {next_start_date.strftime('%Y-%m-%d')} to {
                        next_end_date.strftime('%Y-%m-%d')
                    }..."
                )

                # Reset the progress bar for the new fetch
                progress.update(task_id, completed=0, total=0)

                # Fetch events for the next date range
                next_events, next_total_events = await fetch_calendar_events(
                    headers=headers,
                    days_back=0,
                    days_forward=days_forward,
                    start_date=next_start_date,
                    end_date=next_end_date,
                )

                # Update progress bar with total events
                progress.update(task_id, total=next_total_events)

                if not dry_run:
                    if vdir_path and org_vdir_path:
                        save_events_to_vdir(
                            next_events, org_vdir_path, progress, task_id, dry_run
                        )
                    else:
                        save_events_to_file(
                            next_events,
                            f"output_ics/outlook_events_{next_start_date.strftime('%Y%m%d')}.ics",
                            progress,
                            task_id,
                            dry_run,
                        )
                else:
                    progress.console.print(
                        f"[DRY-RUN] Would save {len(next_events)} events to {
                            'vdir format'
                            if vdir_path
                            else 'output_ics/outlook_events_'
                            + next_start_date.strftime('%Y%m%d')
                            + '.ics'
                        }"
                    )
                    progress.update(task_id, advance=len(next_events))

                # Calculate the next date range
                next_start_date = next_end_date
                next_end_date = next_start_date + timedelta(days=days_forward)

                progress.console.print(
                    f"\nNext date range would be: {
                        next_start_date.strftime('%Y-%m-%d')
                    } to {next_end_date.strftime('%Y-%m-%d')}"
                )
                user_response = (
                    click.prompt("\nContinue to iterate? [y/N]", default="N")
                    .strip()
                    .lower()
                )

        return events
    except Exception as e:
        progress.console.print(
            f"[red]Error fetching or saving calendar events: {str(e)}[/red]"
        )
        import traceback

        progress.console.print(f"[red]{traceback.format_exc()}[/red]")
        progress.update(task_id, completed=True)
        return []


async def _sync_outlook_data(
    dry_run,
    vdir,
    icsfile,
    org,
    days_back,
    days_forward,
    continue_iteration,
    download_attachments,
    two_way_calendar,
    notify,
):
    """Synchronize data from external sources."""

    # Expand the user home directory in vdir path
    vdir = os.path.expanduser(vdir)

    # Save emails to Maildir
    base_maildir_path = os.getenv("MAILDIR_PATH", os.path.expanduser("~/Mail"))
    maildir_path = base_maildir_path + f"/{org}"
    attachments_dir = os.path.join(maildir_path, "attachments")
    ensure_directory_exists(attachments_dir)
    create_maildir_structure(maildir_path)

    # Define scopes for Microsoft Graph API
    scopes = [
        "https://graph.microsoft.com/Calendars.Read",
        "https://graph.microsoft.com/Mail.ReadWrite",
    ]

    # Authenticate and get access token
    access_token, headers = get_access_token(scopes)

    # Set up the progress bars
    progress = Progress(
        SpinnerColumn(), MofNCompleteColumn(), *Progress.get_default_columns()
    )

    with progress:
        task_fetch = progress.add_task("[green]Syncing Inbox...", total=0)
        task_fetch_archive = progress.add_task("[green]Syncing Archive...", total=0)
        task_calendar = progress.add_task("[cyan]Fetching calendar...", total=0)
        task_local_calendar = progress.add_task(
            "[magenta]Syncing local calendar...", total=0
        )
        task_read = progress.add_task("[blue]Marking as read...", total=0)
        task_archive = progress.add_task("[yellow]Archiving mail...", total=0)
        task_delete = progress.add_task("[red]Deleting mail...", total=0)
        task_outbox = progress.add_task(
            "[bright_green]Sending outbound mail...", total=0
        )

        # Stage 1: Synchronize local changes (read, archive, delete, calendar) to the server
        progress.console.print(
            "[bold cyan]Step 1: Syncing local changes to server...[/bold cyan]"
        )

        # Handle calendar sync first (if vdir is specified and two-way sync is enabled)
        calendar_sync_results = (0, 0)
        if vdir and two_way_calendar:
            org_vdir_path = os.path.join(os.path.expanduser(vdir), org)
            progress.console.print(
                f"[magenta]Checking for local calendar changes in {org_vdir_path}...[/magenta]"
            )
            calendar_sync_results = await sync_local_calendar_changes(
                headers, org_vdir_path, progress, task_local_calendar, dry_run
            )

        # Handle mail changes and outbound email in parallel
        await asyncio.gather(
            synchronize_maildir_async(
                maildir_path, headers, progress, task_read, dry_run
            ),
            archive_mail_async(maildir_path, headers, progress, task_archive, dry_run),
            delete_mail_async(maildir_path, headers, progress, task_delete, dry_run),
            process_outbox_async(
                base_maildir_path, org, headers, progress, task_outbox, dry_run
            ),
        )
        progress.console.print("[bold green]Step 1: Local changes synced.[/bold green]")

        # Report calendar sync results
        created, deleted = calendar_sync_results
        if two_way_calendar and (created > 0 or deleted > 0):
            progress.console.print(
                f"[magenta]📅 Two-way calendar sync: {created} events created, {deleted} events deleted[/magenta]"
            )
        elif two_way_calendar:
            progress.console.print(
                "[magenta]📅 Two-way calendar sync: No local changes detected[/magenta]"
            )

        # Stage 2: Fetch new data from the server
        progress.console.print(
            "\n[bold cyan]Step 2: Fetching new data from server...[/bold cyan]"
        )

        # Track messages before sync for notifications
        maildir_path = (
            os.getenv("MAILDIR_PATH", os.path.expanduser("~/Mail")) + f"/{org}"
        )
        messages_before = 0
        new_dir = os.path.join(maildir_path, "new")
        cur_dir = os.path.join(maildir_path, "cur")
        if notify:
            if os.path.exists(new_dir):
                messages_before += len([f for f in os.listdir(new_dir) if ".eml" in f])
            if os.path.exists(cur_dir):
                messages_before += len([f for f in os.listdir(cur_dir) if ".eml" in f])

        await asyncio.gather(
            fetch_mail_async(
                maildir_path,
                attachments_dir,
                headers,
                progress,
                task_fetch,
                dry_run,
                download_attachments,
            ),
            fetch_archive_mail_async(
                maildir_path,
                attachments_dir,
                headers,
                progress,
                task_fetch_archive,
                dry_run,
                download_attachments,
            ),
            fetch_calendar_async(
                headers,
                progress,
                task_calendar,
                dry_run,
                vdir,
                icsfile,
                org,
                days_back,
                days_forward,
                continue_iteration,
            ),
        )

        # Send notification for new emails if enabled
        if notify and not dry_run:
            messages_after = 0
            if os.path.exists(new_dir):
                messages_after += len([f for f in os.listdir(new_dir) if ".eml" in f])
            if os.path.exists(cur_dir):
                messages_after += len([f for f in os.listdir(cur_dir) if ".eml" in f])

            new_message_count = messages_after - messages_before
            if new_message_count > 0:
                notify_new_emails(new_message_count, org)

        progress.console.print("[bold green]Step 2: New data fetched.[/bold green]")

        # Stage 3: Run Godspeed operations based on timing
        progress.console.print(
            "\n[bold cyan]Step 3: Running Godspeed operations...[/bold cyan]"
        )

        # Check if Godspeed sync should run (every 15 minutes)
        if should_run_godspeed_sync():
            await run_godspeed_sync(progress)
        else:
            progress.console.print("[dim]⏭️  Skipping Godspeed sync (not due yet)[/dim]")

        # Check if task sweep should run (once after 6pm daily)
        if should_run_sweep():
            await run_task_sweep(progress)
        else:
            current_hour = datetime.now().hour
            if current_hour < 18:
                progress.console.print(
                    "[dim]⏭️  Skipping task sweep (before 6 PM)[/dim]"
                )
            else:
                progress.console.print(
                    "[dim]⏭️  Skipping task sweep (already completed today)[/dim]"
                )

        progress.console.print(
            "[bold green]Step 3: Godspeed operations completed.[/bold green]"
        )

    click.echo("Sync complete.")


@click.group(invoke_without_command=True)
@click.option(
    "--once",
    is_flag=True,
    help="Run a single sync and exit (non-interactive).",
    default=False,
)
@click.option(
    "--daemon",
    is_flag=True,
    help="Run in background daemon mode.",
    default=False,
)
@click.option(
    "--org",
    help="Specify the organization name for the subfolder to store emails and calendar events",
    default="corteva",
)
@click.option(
    "--vdir",
    help="Output calendar events in vdir format to the specified directory",
    default="~/Calendar",
)
@click.option(
    "--notify/--no-notify",
    help="Send macOS notifications for new email messages",
    default=True,
)
@click.option(
    "--dry-run",
    is_flag=True,
    help="Run in dry-run mode without making changes.",
    default=False,
)
@click.option(
    "--demo",
    is_flag=True,
    help="Run with simulated sync (demo mode)",
    default=False,
)
@click.option(
    "--days-back",
    type=int,
    help="Number of days to look back for calendar events",
    default=1,
)
@click.option(
    "--days-forward",
    type=int,
    help="Number of days to look forward for calendar events",
    default=30,
)
@click.option(
    "--download-attachments",
    is_flag=True,
    help="Download email attachments",
    default=False,
)
@click.option(
    "--two-way-calendar",
    is_flag=True,
    help="Enable two-way calendar sync (sync local changes to server)",
    default=False,
)
@click.pass_context
def sync(
    ctx,
    once,
    daemon,
    org,
    vdir,
    notify,
    dry_run,
    demo,
    days_back,
    days_forward,
    download_attachments,
    two_way_calendar,
):
    """Email and calendar synchronization.

    By default, opens the interactive TUI dashboard.
    Use --once for a single sync, or --daemon for background mode.
    """
    # If a subcommand is invoked, let it handle everything
    if ctx.invoked_subcommand is not None:
        return

    # Handle the default behavior (no subcommand)
    if daemon:
        # Run in daemon mode
        from .sync_daemon import create_daemon_config, SyncDaemon

        config = create_daemon_config(
            dry_run=dry_run,
            vdir=vdir,
            icsfile=None,
            org=org,
            days_back=days_back,
            days_forward=days_forward,
            continue_iteration=False,
            download_attachments=download_attachments,
            two_way_calendar=two_way_calendar,
            notify=notify,
        )

        daemon_instance = SyncDaemon(config)
        daemon_instance.start()
    elif once:
        # Run a single sync (non-interactive)
        asyncio.run(
            _sync_outlook_data(
                dry_run,
                vdir,
                None,  # icsfile
                org,
                days_back,
                days_forward,
                False,  # continue_iteration
                download_attachments,
                two_way_calendar,
                notify,
            )
        )
    else:
        # Default: Launch interactive TUI dashboard
        from .sync_dashboard import run_dashboard_sync

        sync_config = {
            "org": org,
            "vdir": vdir,
            "notify": notify,
            "dry_run": dry_run,
            "days_back": days_back,
            "days_forward": days_forward,
            "download_attachments": download_attachments,
            "two_way_calendar": two_way_calendar,
            "continue_iteration": False,
            "icsfile": None,
        }
        asyncio.run(
            run_dashboard_sync(notify=notify, sync_config=sync_config, demo_mode=demo)
        )


def daemonize():
    """Properly daemonize the process for Unix systems."""
    # First fork
    try:
        pid = os.fork()
        if pid > 0:
            # Parent exits
            sys.exit(0)
    except OSError as e:
        sys.stderr.write(f"Fork #1 failed: {e}\n")
        sys.exit(1)

    # Decouple from parent environment
    os.chdir("/")
    os.setsid()
    os.umask(0)

    # Second fork
    try:
        pid = os.fork()
        if pid > 0:
            # Parent exits
            sys.exit(0)
    except OSError as e:
        sys.stderr.write(f"Fork #2 failed: {e}\n")
        sys.exit(1)

    # Redirect standard file descriptors
    sys.stdout.flush()
    sys.stderr.flush()
    si = open(os.devnull, "r")
    so = open(os.devnull, "a+")
    se = open(os.devnull, "a+")
    os.dup2(si.fileno(), sys.stdin.fileno())
    os.dup2(so.fileno(), sys.stdout.fileno())
    os.dup2(se.fileno(), sys.stderr.fileno())


@sync.command()
@click.option(
    "--dry-run",
    is_flag=True,
    help="Run in dry-run mode without making changes.",
    default=False,
)
@click.option(
    "--vdir",
    help="Output calendar events in vdir format to the specified directory (each event in its own file)",
    default="~/Calendar",
)
@click.option(
    "--icsfile", help="Output calendar events into this ics file path.", default=None
)
@click.option(
    "--org",
    help="Specify the organization name for the subfolder to store emails and calendar events",
    default="corteva",
)
@click.option(
    "--days-back",
    type=int,
    help="Number of days to look back for calendar events",
    default=1,
)
@click.option(
    "--days-forward",
    type=int,
    help="Number of days to look forward for calendar events",
    default=30,
)
@click.option(
    "--continue-iteration",
    is_flag=True,
    help="Enable interactive mode to continue fetching more date ranges",
    default=False,
)
@click.option(
    "--download-attachments",
    is_flag=True,
    help="Download email attachments",
    default=False,
)
@click.option(
    "--two-way-calendar",
    is_flag=True,
    help="Enable two-way calendar sync (sync local changes to server)",
    default=False,
)
@click.option(
    "--notify",
    is_flag=True,
    help="Send macOS notifications for new email messages",
    default=False,
)
def run(
    dry_run,
    vdir,
    icsfile,
    org,
    days_back,
    days_forward,
    continue_iteration,
    download_attachments,
    two_way_calendar,
    notify,
):
    """Run a single sync operation (legacy command, prefer 'luk sync --once')."""
    asyncio.run(
        _sync_outlook_data(
            dry_run,
            vdir,
            icsfile,
            org,
            days_back,
            days_forward,
            continue_iteration,
            download_attachments,
            two_way_calendar,
            notify,
        )
    )


@sync.command()
def stop():
    """Stop the sync daemon."""
    pid_file = os.path.expanduser("~/.config/luk/luk.pid")

    if not os.path.exists(pid_file):
        click.echo("Daemon is not running (no PID file found)")
        return

    try:
        with open(pid_file, "r") as f:
            pid = int(f.read().strip())

        # Send SIGTERM to process
        os.kill(pid, signal.SIGTERM)

        # Remove PID file
        os.unlink(pid_file)

        click.echo(f"Daemon stopped (PID {pid})")
    except (ValueError, ProcessLookupError, OSError) as e:
        click.echo(f"Error stopping daemon: {e}")
        # Clean up stale PID file
        if os.path.exists(pid_file):
            os.unlink(pid_file)


@sync.command()
def status():
    """Check the status of the sync daemon."""
    pid_file = os.path.expanduser("~/.config/luk/luk.pid")

    if not os.path.exists(pid_file):
        click.echo("Daemon is not running")
        return

    try:
        with open(pid_file, "r") as f:
            pid = int(f.read().strip())

        # Check if process exists
        os.kill(pid, 0)  # Send signal 0 to check if process exists
        click.echo(f"Daemon is running (PID {pid})")
    except (ValueError, ProcessLookupError, OSError):
        click.echo("Daemon is not running (stale PID file)")
        # Clean up stale PID file
        os.unlink(pid_file)


@sync.command(name="interactive")
@click.option(
    "--org",
    help="Specify the organization name for the subfolder to store emails and calendar events",
    default="corteva",
)
@click.option(
    "--vdir",
    help="Output calendar events in vdir format to the specified directory",
    default="~/Calendar",
)
@click.option(
    "--notify/--no-notify",
    help="Send macOS notifications for new email messages",
    default=True,
)
@click.option(
    "--dry-run",
    is_flag=True,
    help="Run in dry-run mode without making changes.",
    default=False,
)
@click.option(
    "--demo",
    is_flag=True,
    help="Run with simulated sync (demo mode)",
    default=False,
)
def interactive(org, vdir, notify, dry_run, demo):
    """Launch interactive TUI dashboard for sync operations."""
    from .sync_dashboard import run_dashboard_sync

    sync_config = {
        "org": org,
        "vdir": vdir,
        "notify": notify,
        "dry_run": dry_run,
        "days_back": 1,
        "days_forward": 30,
        "download_attachments": False,
        "two_way_calendar": False,
        "continue_iteration": False,
        "icsfile": None,
    }
    asyncio.run(
        run_dashboard_sync(notify=notify, sync_config=sync_config, demo_mode=demo)
    )


# Alias 'i' for 'interactive'
sync.add_command(interactive, name="i")


def check_calendar_changes(vdir_path, org):
    """
    Check if there are local calendar changes that need syncing.

    Args:
        vdir_path (str): Base vdir path
        org (str): Organization name

    Returns:
        tuple: (has_changes, change_description)
    """
    if not vdir_path:
        return False, "No vdir path configured"

    org_vdir_path = os.path.join(os.path.expanduser(vdir_path), org)

    if not os.path.exists(org_vdir_path):
        return False, "Calendar directory does not exist"

    try:
        # Get last sync time
        last_sync_time = get_last_sync_time(org_vdir_path)

        # Check if vdir directory has been modified since last sync
        vdir_mtime = os.path.getmtime(org_vdir_path)

        if vdir_mtime > last_sync_time:
            # Check for specific types of changes
            deleted_events = detect_deleted_events(org_vdir_path)

            # Count .ics files to detect new events
            import glob

            ics_files = glob.glob(os.path.join(org_vdir_path, "*.ics"))

            # Load previous state to compare
            state_file = os.path.join(org_vdir_path, ".sync_state.json")
            previous_state = {}
            if os.path.exists(state_file):
                try:
                    import json

                    with open(state_file, "r") as f:
                        previous_state = json.load(f)
                except Exception:
                    pass

            new_event_count = len(ics_files) - len(previous_state) + len(deleted_events)

            if deleted_events or new_event_count > 0:
                changes = []
                if new_event_count > 0:
                    changes.append(f"{new_event_count} new events")
                if deleted_events:
                    changes.append(f"{len(deleted_events)} deleted events")

                return True, ", ".join(changes)
            else:
                return True, "directory modified"

        return False, "no changes detected"

    except Exception as e:
        return False, f"error checking calendar: {str(e)}"


async def daemon_mode(
    dry_run,
    vdir,
    icsfile,
    org,
    days_back,
    days_forward,
    continue_iteration,
    download_attachments,
    two_way_calendar,
    notify,
):
    """
    Run the script in daemon mode, periodically syncing emails and calendar.
    """
    from src.services.microsoft_graph.mail import get_inbox_count_async
    from rich.console import Console
    from rich.panel import Panel
    from rich.text import Text
    from datetime import datetime
    import time

    console = Console()
    sync_interval = 300  # 5 minutes
    check_interval = 10  # 10 seconds
    last_sync_time = time.time() - sync_interval  # Force initial sync

    def create_status_display(status_text, status_color="cyan"):
        """Create a status panel for daemon mode."""
        timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
        content = Text()
        content.append(f"[{timestamp}] ", style="dim")
        content.append(status_text, style=status_color)

        return Panel(
            content,
            title="📧 Email & Calendar Sync Daemon",
            border_style="blue",
            padding=(0, 1),
        )

    # Initial display
    console.print(create_status_display("Starting daemon mode...", "green"))

    while True:
        if time.time() - last_sync_time >= sync_interval:
            # Show full sync status
            console.clear()
            console.print(create_status_display("Performing full sync...", "green"))

            # Perform a full sync
            await _sync_outlook_data(
                dry_run,
                vdir,
                icsfile,
                org,
                days_back,
                days_forward,
                continue_iteration,
                download_attachments,
                two_way_calendar,
                notify,
            )
            last_sync_time = time.time()

            # Show completion
            console.print(create_status_display("Full sync completed ✅", "green"))
        else:
            # Show checking status
            console.clear()
            console.print(create_status_display("Checking for changes...", "cyan"))

            try:
                # Authenticate and get access token for mail check
                scopes = ["https://graph.microsoft.com/Mail.Read"]
                access_token, headers = get_access_token(scopes)
                remote_message_count = await get_inbox_count_async(headers)
                maildir_path = os.path.expanduser(f"~/Mail/{org}")

                # Count local messages
                new_dir = os.path.join(maildir_path, "new")
                cur_dir = os.path.join(maildir_path, "cur")
                local_message_count = 0

                if os.path.exists(new_dir):
                    local_message_count += len(
                        [f for f in os.listdir(new_dir) if ".eml" in f]
                    )
                if os.path.exists(cur_dir):
                    local_message_count += len(
                        [f for f in os.listdir(cur_dir) if ".eml" in f]
                    )

                mail_changes = remote_message_count != local_message_count

                # Check for calendar changes if two-way sync is enabled
                calendar_changes = False
                calendar_change_desc = ""
                if two_way_calendar and vdir:
                    calendar_changes, calendar_change_desc = check_calendar_changes(
                        vdir, org
                    )

                # Check for outbound emails in outbox
                base_maildir_path = os.getenv(
                    "MAILDIR_PATH", os.path.expanduser("~/Mail")
                )
                outbox_new_dir = os.path.join(base_maildir_path, org, "outbox", "new")
                outbox_changes = False
                pending_email_count = 0

                if os.path.exists(outbox_new_dir):
                    pending_emails = [
                        f for f in os.listdir(outbox_new_dir) if not f.startswith(".")
                    ]
                    pending_email_count = len(pending_emails)
                    outbox_changes = pending_email_count > 0

                # Check Godspeed operations
                godspeed_sync_due = should_run_godspeed_sync()
                sweep_due = should_run_sweep()

                # Determine what changed and show appropriate status
                changes_detected = (
                    mail_changes
                    or calendar_changes
                    or outbox_changes
                    or godspeed_sync_due
                    or sweep_due
                )

                if changes_detected:
                    change_parts = []
                    if mail_changes:
                        change_parts.append(
                            f"Mail: Remote {remote_message_count}, Local {local_message_count}"
                        )
                    if calendar_changes:
                        change_parts.append(f"Calendar: {calendar_change_desc}")
                    if outbox_changes:
                        change_parts.append(f"Outbox: {pending_email_count} pending")
                    if godspeed_sync_due:
                        change_parts.append("Godspeed sync due")
                    if sweep_due:
                        change_parts.append("Task sweep due")

                    console.print(
                        create_status_display(
                            f"Changes detected! {' | '.join(change_parts)}. Starting sync...",
                            "yellow",
                        )
                    )

                # Sync if any changes detected
                if changes_detected:
                    await _sync_outlook_data(
                        dry_run,
                        vdir,
                        icsfile,
                        org,
                        days_back,
                        days_forward,
                        continue_iteration,
                        download_attachments,
                        two_way_calendar,
                        notify,
                    )
                    last_sync_time = time.time()
                    console.print(create_status_display("Sync completed ✅", "green"))
                else:
                    status_parts = [
                        f"Mail: Remote {remote_message_count}, Local {local_message_count}"
                    ]
                    if two_way_calendar:
                        status_parts.append(f"Calendar: {calendar_change_desc}")

                    status_parts.append(f"Outbox: {pending_email_count} pending")

                    # Add Godspeed status
                    state = load_sync_state()
                    last_godspeed = state.get("last_godspeed_sync", 0)
                    minutes_since_godspeed = int((time.time() - last_godspeed) / 60)
                    status_parts.append(f"Godspeed: {minutes_since_godspeed}m ago")

                    last_sweep = state.get("last_sweep_date")
                    if last_sweep == datetime.now().strftime("%Y-%m-%d"):
                        status_parts.append("Sweep: done today")
                    else:
                        current_hour = datetime.now().hour
                        if current_hour >= 18:
                            status_parts.append("Sweep: due")
                        else:
                            hours_until_sweep = 18 - current_hour
                            status_parts.append(f"Sweep: in {hours_until_sweep}h")

                    console.print(
                        create_status_display(
                            f"No changes detected ({', '.join(status_parts)})",
                            "green",
                        )
                    )
            except Exception as e:
                console.print(
                    create_status_display(f"Error during check: {str(e)}", "red")
                )

        time.sleep(check_interval)