"""
Ohm Stream Downloader - FastAPI Application

Main application file with startup configuration and middleware.
All API routes have been migrated to app/routers/ for better maintainability.
"""

import asyncio
import logging
import uuid
from datetime import datetime
from pathlib import Path

from fastapi import FastAPI, Request, Response
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
from fastapi.templating import Jinja2Templates

from app.download_manager import DownloadManager
from app.models import DownloadTask, DownloadStatus

# Configure logging
logger = logging.getLogger(__name__)

PERMISSIONS_POLICY_VALUE = (
    "accelerometer=(), ambient-light-sensor=(), autoplay=(), battery=(), "
    "camera=(), display-capture=(), document-domain=(), encrypted-media=(), "
    "fullscreen=*, gamepad=(), geolocation=(), gyroscope=(), "
    "magnetometer=(), microphone=(), midi=(), payment=(), picture-in-picture=*, "
    "publickey-credentials-get=(), screen-wake-lock=(), sync-xhr=(), "
    "usb=(), web-share=(), xr-spatial-tracking=()"
)

# Initialize FastAPI app
app = FastAPI(title="Ohm Stream Downloader")

app.add_middleware(
    CORSMiddleware,
    allow_origins=[
        "http://localhost:3000",
        "http://127.0.0.1:3000",
        "http://192.168.1.204:3000",
        "http://192.168.1.204",
        "http://192.168.1.200:3000",
        "http://192.168.1.200",
        "http://192.168.5.127:3000",
        "http://192.168.5.127",
    ],
    allow_credentials=True,
    allow_methods=["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS"],
    allow_headers=["*"],
)


@app.middleware("http")
async def permissions_policy_middleware(request: Request, call_next):
    response: Response = await call_next(request)
    response.headers["Permissions-Policy"] = PERMISSIONS_POLICY_VALUE
    return response


# Initialize download manager
download_manager = DownloadManager(download_dir="downloads", max_parallel=3)

# Initialize episode checker with download manager
from app.episode_checker import episode_checker

episode_checker.set_download_manager(download_manager)


@app.on_event("startup")
async def startup_event():
    """Initialize services on application startup"""
    # Create database tables if they don't exist
    from app.database import create_db_and_tables

    create_db_and_tables()
    logger.info("Database tables initialized")

    from app.sonarr_handler import get_sonarr_handler

    sonarr_handler = get_sonarr_handler()
    sonarr_handler.set_download_manager(download_manager)

    from app.auto_download_scheduler import auto_download_scheduler

    auto_download_scheduler.start()

    # Run initial provider health check in background
    from app.providers_manager import providers_manager

    asyncio.create_task(providers_manager.check_all_health())
    logger.info("Application started: Sonarr handler and scheduler initialized")


def restore_completed_downloads():
    """Scan downloads directory and restore completed download tasks"""
    download_dir = Path("downloads")
    if not download_dir.exists():
        return

    video_extensions = {".mp4", ".mkv", ".avi", ".mov", ".wmv", ".flv", ".webm"}

    for file_path in download_dir.iterdir():
        if file_path.is_file() and file_path.suffix.lower() in video_extensions:
            if file_path.stat().st_size < 1024 * 1024:
                continue

            filename = file_path.name
            file_size = file_path.stat().st_size

            task_id = str(uuid.uuid4())
            task = DownloadTask(
                id=task_id,
                url="",
                filename=filename,
                host="other",
                status=DownloadStatus.COMPLETED,
                progress=100.0,
                downloaded_bytes=file_size,
                total_bytes=file_size,
                speed=0.0,
                file_path=str(file_path),
                created_at=datetime.fromtimestamp(file_path.stat().st_ctime),
                completed_at=datetime.fromtimestamp(file_path.stat().st_mtime),
            )

            download_manager.tasks[task_id] = task
            logger.info(f"Restored completed download: {filename}")


# Restore completed downloads on startup
restore_completed_downloads()

# Mount static files and templates
app.mount("/static", StaticFiles(directory="static"), name="static")
app.mount("/downloads", StaticFiles(directory="downloads"), name="downloads")
templates = Jinja2Templates(directory="templates")


# ==================== INCLUDE ROUTERS ====================

from app.routers import (
    auth_router,
    downloads_router,
    anime_router,
    favorites_router,
    recommendations_router,
    watchlist_router,
    sonarr_router,
    player_router,
    static_router,
    root_router,
    settings_router,
    admin_router,
)


# Include routers
app.include_router(root_router)
app.include_router(auth_router)
app.include_router(downloads_router)
app.include_router(anime_router)
app.include_router(favorites_router)
app.include_router(recommendations_router)
app.include_router(watchlist_router)
app.include_router(sonarr_router)
app.include_router(player_router)
app.include_router(static_router)
app.include_router(settings_router)
app.include_router(admin_router)


if __name__ == "__main__":
    import uvicorn

    uvicorn.run("main:app", host="0.0.0.0", port=3000, reload=True)