# api/app.py
import os
from contextlib import asynccontextmanager
from typing import AsyncGenerator

# import logging
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
from loguru import logger

from ..version import VERSION
from .config import settings
from .deps import cleanup_managers, init_managers
from .initialization import AppInitializer
from .routes import runs, sessions, teams, ws

# Configure logging
# logger = logging.getLogger(__name__)
# logging.basicConfig(level=logging.INFO)


# Initialize application
app_file_path = os.path.dirname(os.path.abspath(__file__))
initializer = AppInitializer(settings, app_file_path)


@asynccontextmanager
async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
    """
    Lifecycle manager for the FastAPI application.
    Handles initialization and cleanup of application resources.
    """
    # Startup
    logger.info("Initializing application...")
    try:
        # Initialize managers (DB, Connection, Team)
        await init_managers(initializer.database_uri, initializer.config_dir, initializer.app_root)
        logger.info("Managers initialized successfully")

        # Any other initialization code
        logger.info("Application startup complete")

    except Exception as e:
        logger.error(f"Failed to initialize application: {str(e)}")
        raise

    yield  # Application runs here

    # Shutdown
    try:
        logger.info("Cleaning up application resources...")
        await cleanup_managers()
        logger.info("Application shutdown complete")
    except Exception as e:
        logger.error(f"Error during shutdown: {str(e)}")


# Create FastAPI application
app = FastAPI(lifespan=lifespan, debug=True)

# CORS middleware configuration
app.add_middleware(
    CORSMiddleware,
    allow_origins=[
        "http://localhost:8000",
        "http://127.0.0.1:8000",
        "http://localhost:8001",
        "http://localhost:8081",
    ],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Create API router with version and documentation
api = FastAPI(
    root_path="/api",
    title="AutoGen Studio API",
    version=VERSION,
    description="AutoGen Studio is a low-code tool for building and testing multi-agent workflows.",
    docs_url="/docs" if settings.API_DOCS else None,
)

# Include all routers with their prefixes
api.include_router(
    sessions.router,
    prefix="/sessions",
    tags=["sessions"],
    responses={404: {"description": "Not found"}},
)

api.include_router(
    runs.router,
    prefix="/runs",
    tags=["runs"],
    responses={404: {"description": "Not found"}},
)

api.include_router(
    teams.router,
    prefix="/teams",
    tags=["teams"],
    responses={404: {"description": "Not found"}},
)


api.include_router(
    ws.router,
    prefix="/ws",
    tags=["websocket"],
    responses={404: {"description": "Not found"}},
)


# Version endpoint


@api.get("/version")
async def get_version():
    """Get API version"""
    return {
        "status": True,
        "message": "Version retrieved successfully",
        "data": {"version": VERSION},
    }


# Health check endpoint


@api.get("/health")
async def health_check():
    """API health check endpoint"""
    return {
        "status": True,
        "message": "Service is healthy",
    }


# Mount static file directories
app.mount("/api", api)
app.mount(
    "/files",
    StaticFiles(directory=initializer.static_root, html=True),
    name="files",
)
app.mount("/", StaticFiles(directory=initializer.ui_root, html=True), name="ui")

# Error handlers


@app.exception_handler(500)
async def internal_error_handler(request, exc):
    logger.error(f"Internal error: {str(exc)}")
    return {
        "status": False,
        "message": "Internal server error",
        "detail": str(exc) if settings.API_DOCS else "Internal server error",
    }


def create_app() -> FastAPI:
    """
    Factory function to create and configure the FastAPI application.
    Useful for testing and different deployment scenarios.
    """
    return app
