"""
Mulita - Photo Management Application
Main FastAPI application entry point
"""
from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
import logging
import os

from app.config import settings
from app.database import init_db
from app.routers import photos, folders, heaps, tags, discard, library
from app.services.scanner import start_initial_scan, bootstrap_default_source_root
from app.services.cleanup import cleanup_data_integrity

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
)
logger = logging.getLogger(__name__)

@asynccontextmanager
async def lifespan(app: FastAPI):
    """Manage application lifecycle"""
    logger.info("Starting Mulita application...")

    # Initialize database
    await init_db()

    # First-boot convenience: if there are no source roots in the DB yet,
    # create one for the default /photos mount so the user sees their
    # library immediately without configuring anything in the UI.
    try:
        await bootstrap_default_source_root()
    except Exception as e:
        logger.error(f"Bootstrap source root failed (continuing): {e}")

    # One-shot cleanup of duplicate source_roots / folders left over from
    # earlier scanner versions that didn't normalize paths. Idempotent.
    try:
        await cleanup_data_integrity()
    except Exception as e:
        logger.error(f"Startup cleanup failed (continuing): {e}")

    # Start initial scan if configured
    if settings.scanner.initial_scan_on_start:
        logger.info("Starting initial library scan...")
        await start_initial_scan()

    yield

    logger.info("Shutting down Mulita application...")

# Create FastAPI app
app = FastAPI(
    title="Mulita Photo Management API",
    description="Self-hosted photo management application inspired by Lightroom",
    version="1.0.0",
    lifespan=lifespan
)

# Configure CORS. The frontend normally talks to the backend through the
# nginx (prod) or vite (dev) proxy, so requests are same-origin and never
# trip CORS. The wildcard here is a fallback for the rare case where a
# user / script hits the backend directly from a browser at some other
# origin (LAN IP, reverse proxy under a different host, etc.). This is a
# single-user homelab tool, so a permissive CORS policy is fine.
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=False,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Mount static files for serving thumbnails (with X-Accel-Redirect support)
if os.path.exists("/data/thumbs"):
    app.mount("/thumbs", StaticFiles(directory="/data/thumbs"), name="thumbs")

# Include routers
app.include_router(photos.router, prefix="/api/v1/photos", tags=["photos"])
app.include_router(folders.router, prefix="/api/v1/folders", tags=["folders"])
app.include_router(heaps.router, prefix="/api/v1/heaps", tags=["heaps"])
app.include_router(tags.router, prefix="/api/v1/tags", tags=["tags"])
app.include_router(discard.router, prefix="/api/v1/discard", tags=["discard"])
app.include_router(library.router, prefix="/api/v1/library", tags=["library"])

@app.get("/")
async def root():
    """Root endpoint"""
    return {
        "name": "Mulita Photo Management API",
        "version": "1.0.0",
        "status": "running"
    }

@app.get("/health")
async def health_check():
    """Health check endpoint for Docker"""
    return {"status": "healthy"}