#!/usr/bin/env python3
"""
PIM MCP Server - Personal Information Management via Model Context Protocol

A self-hosted MCP server that provides tools for managing:
- Email (IMAP/SMTP)
- Calendar (CalDAV)
- Contacts (CardDAV)
"""

import logging
import os
import sys

# Add src directory to path for imports
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))

from fastmcp import FastMCP

from config import settings
from database import init_db, close_db

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
)

# Initialize MCP server
mcp = FastMCP(
    name=settings.server_name,
    instructions="Personal Information Management MCP Server for Email, Calendar, and Contacts",
)

# Initialize services based on configuration
email_service = None
calendar_service = None
contacts_service = None
email_monitor = None


def setup_services():
    """Initialize services based on configuration."""
    global email_service, calendar_service, contacts_service

    if settings.is_email_configured():
        from services.email_service import EmailService
        email_service = EmailService(settings)
        print(f"  Email service: enabled (IMAP: {settings.imap_host})")
    else:
        print("  Email service: disabled (not configured)")

    if settings.is_calendar_configured():
        from services.calendar_service import CalendarService
        calendar_service = CalendarService(settings)
        if settings.is_caldav_configured():
            print(f"  Calendar service: enabled (CalDAV: {settings.caldav_url})")
        else:
            print("  Calendar service: enabled (ICS calendars only)")
    else:
        print("  Calendar service: disabled (not configured)")

    if settings.is_contacts_configured():
        from services.contacts_service import ContactsService
        contacts_service = ContactsService(settings)
        print(f"  Contacts service: enabled (CardDAV: {settings.carddav_url})")
    else:
        print("  Contacts service: disabled (not configured)")


async def setup_email_monitor():
    """Initialize email notification monitoring."""
    global email_monitor

    if settings.is_notification_configured() and email_service:
        from services.webhook_service import WebhookService
        from services.email_monitor import EmailMonitor

        webhook_service = WebhookService(settings)
        email_monitor = EmailMonitor(email_service, webhook_service, settings)
        await email_monitor.start()
        print(f"  Email notifications: enabled (monitoring: {settings.notification_mailboxes})")
    else:
        print("  Email notifications: disabled (not configured)")


def register_tools():
    """Register MCP tools based on enabled services."""
    if email_service:
        from tools.email_tools import register_email_tools
        register_email_tools(mcp, email_service)
        print("  Registered email tools")

    if calendar_service:
        from tools.calendar_tools import register_calendar_tools
        register_calendar_tools(mcp, calendar_service)
        print("  Registered calendar tools")

    if contacts_service:
        from tools.contacts_tools import register_contacts_tools
        register_contacts_tools(mcp, contacts_service)
        print("  Registered contacts tools")


# Server info tool (always available)
@mcp.tool(description="Get information about this PIM MCP server including enabled services and version.")
def get_server_info() -> dict:
    """Get server information and status."""
    return {
        "server_name": settings.server_name,
        "version": "1.0.0",
        "environment": settings.environment,
        "services": {
            "email": {
                "enabled": email_service is not None,
                "imap_host": settings.imap_host if email_service else None,
                "smtp_configured": settings.is_smtp_configured() if email_service else False,
            },
            "calendar": {
                "enabled": calendar_service is not None,
                "caldav_url": settings.caldav_url if calendar_service else None,
                "ics_calendars": [c[1] for c in settings.get_ics_calendars()] if calendar_service else [],
            },
            "contacts": {
                "enabled": contacts_service is not None,
                "carddav_url": settings.carddav_url if contacts_service else None,
            },
        },
    }


async def initialize():
    """Initialize the server."""
    print(f"\n{'='*60}")
    print(f"  {settings.server_name}")
    print(f"{'='*60}")
    print(f"\nInitializing database...")
    await init_db(settings.sqlite_path)
    print(f"  Database: {settings.sqlite_path}")
    print("  Using SQLModel with Alembic migrations")

    print(f"\nConfiguring services...")
    setup_services()

    print(f"\nRegistering tools...")
    register_tools()

    print(f"\nStarting background services...")
    await setup_email_monitor()

    print(f"\n{'='*60}")


async def shutdown():
    """Shutdown the server gracefully."""
    global email_monitor
    print("\nShutting down...")

    if email_monitor:
        await email_monitor.stop()
        email_monitor = None

    await close_db()
    print("Shutdown complete")


if __name__ == "__main__":
    import asyncio
    import signal
    import uvicorn

    from starlette.responses import JSONResponse
    from starlette.routing import Route

    from middleware import APIKeyAuthMiddleware

    async def health_check(request):
        """Health check endpoint for Docker/Traefik."""
        return JSONResponse({"status": "healthy"})

    async def main():
        await initialize()

        port = settings.server_port
        host = settings.server_host

        # Get the underlying ASGI app from FastMCP
        app = mcp.http_app(path="/mcp")

        # Add health check route
        app.routes.append(Route("/health", health_check))

        # Add authentication middleware if API key is configured
        if settings.mcp_api_key:
            app.add_middleware(
                APIKeyAuthMiddleware,
                api_key=settings.mcp_api_key.get_secret_value(),
            )
            print(f"\n  Authentication: enabled (API key required)")
        else:
            print(f"\n  Authentication: disabled (no MCP_API_KEY set)")

        print(f"\nStarting server on {host}:{port}")
        print(f"MCP endpoint: http://{host}:{port}/mcp")
        print(f"{'='*60}\n")

        # Setup signal handlers for graceful shutdown
        loop = asyncio.get_running_loop()

        def signal_handler():
            asyncio.create_task(shutdown())

        for sig in (signal.SIGTERM, signal.SIGINT):
            loop.add_signal_handler(sig, signal_handler)

        # Run with uvicorn
        config = uvicorn.Config(
            app,
            host=host,
            port=port,
            log_level="info",
        )
        server = uvicorn.Server(config)

        try:
            await server.serve()
        finally:
            await shutdown()

    asyncio.run(main())