"""
pyserve up - Start all services
"""

import asyncio
import signal
import sys
import time
from pathlib import Path
from typing import Any

import click


@click.command("up")
@click.argument("services", nargs=-1)
@click.option(
    "-d",
    "--detach",
    is_flag=True,
    help="Run in background (detached mode)",
)
@click.option(
    "--build",
    is_flag=True,
    help="Build/reload applications before starting",
)
@click.option(
    "--force-recreate",
    is_flag=True,
    help="Recreate services even if configuration hasn't changed",
)
@click.option(
    "--scale",
    "scales",
    multiple=True,
    help="Scale SERVICE to NUM workers (e.g., --scale api=4)",
)
@click.option(
    "--timeout",
    "timeout",
    default=60,
    type=int,
    help="Timeout in seconds for service startup",
)
@click.option(
    "--wait",
    is_flag=True,
    help="Wait for services to be healthy before returning",
)
@click.option(
    "--remove-orphans",
    is_flag=True,
    help="Remove services not defined in configuration",
)
@click.pass_obj
def up_cmd(
    ctx: Any,
    services: tuple[str, ...],
    detach: bool,
    build: bool,
    force_recreate: bool,
    scales: tuple[str, ...],
    timeout: int,
    wait: bool,
    remove_orphans: bool,
) -> None:
    """
    Start services defined in configuration.

    If no services are specified, all services will be started.

    \b
    Examples:
      pyserve up                    # Start all services
      pyserve up -d                 # Start in background
      pyserve up api admin          # Start specific services
      pyserve up --scale api=4      # Scale api to 4 workers
      pyserve up --wait             # Wait for healthy status
    """
    from .._runner import ServiceRunner
    from ..output import console, print_error, print_info, print_success, print_warning
    from ..state import StateManager

    config_path = Path(ctx.config_file)

    if not config_path.exists():
        print_error(f"Configuration file not found: {config_path}")
        print_info("Run 'pyserve init' to create a configuration file")
        raise click.Abort()

    scale_map = {}
    for scale in scales:
        try:
            service, num = scale.split("=")
            scale_map[service] = int(num)
        except ValueError:
            print_error(f"Invalid scale format: {scale}. Use SERVICE=NUM")
            raise click.Abort()

    try:
        from ...config import Config

        config = Config.from_yaml(str(config_path))
    except Exception as e:
        print_error(f"Failed to load configuration: {e}")
        raise click.Abort()

    state_manager = StateManager(Path(".pyserve"), ctx.project)

    if state_manager.is_daemon_running():
        daemon_pid = state_manager.get_daemon_pid()
        print_warning(f"PyServe daemon is already running (PID: {daemon_pid})")
        if not click.confirm("Do you want to restart it?"):
            raise click.Abort()
        try:
            import os
            from typing import cast

            # FIXME: Please fix the cast usage here
            os.kill(cast(int, daemon_pid), signal.SIGTERM)
            time.sleep(2)
        except ProcessLookupError:
            pass
        state_manager.clear_daemon_pid()

    runner = ServiceRunner(config, state_manager)

    service_list = list(services) if services else None

    if detach:
        console.print("[bold]Starting PyServe in background...[/bold]")

        try:
            pid = runner.start_daemon(
                service_list,
                scale_map=scale_map,
                force_recreate=force_recreate,
            )
            state_manager.set_daemon_pid(pid)
            print_success(f"PyServe started in background (PID: {pid})")
            print_info("Use 'pyserve ps' to see service status")
            print_info("Use 'pyserve logs -f' to follow logs")
            print_info("Use 'pyserve down' to stop")
        except Exception as e:
            print_error(f"Failed to start daemon: {e}")
            raise click.Abort()
    else:
        console.print("[bold]Starting PyServe...[/bold]")

        def signal_handler(signum: int, frame: Any) -> None:
            console.print("\n[yellow]Received shutdown signal...[/yellow]")
            runner.stop()
            sys.exit(0)

        signal.signal(signal.SIGINT, signal_handler)
        signal.signal(signal.SIGTERM, signal_handler)

        try:
            asyncio.run(
                runner.start(
                    service_list,
                    scale_map=scale_map,
                    force_recreate=force_recreate,
                    wait_healthy=wait,
                    timeout=timeout,
                )
            )
        except KeyboardInterrupt:
            console.print("\n[yellow]Shutting down...[/yellow]")
        except Exception as e:
            print_error(f"Failed to start services: {e}")
            if ctx.debug:
                raise
            raise click.Abort()