import logging
import os
import sys
from pathlib import Path

import uvicorn
from fastapi import FastAPI, HTTPException
from fastapi.responses import FileResponse
from fastapi.staticfiles import StaticFiles
from sqlalchemy import text

sys.path.insert(0, str(Path(__file__).parent))

from database import Base, engine
from routers import auth_router, caldav_router, google_router, ical_router, local_router, profile_router, settings_router, users_router

logging.basicConfig(level=logging.INFO)

# Create DB tables on startup
Base.metadata.create_all(bind=engine)

# Run column migrations for new fields (safe: only adds if not exists)
def _migrate():
    with engine.connect() as conn:
        # Add week_start_day to user_settings if not present
        try:
            conn.execute(text(
                "ALTER TABLE user_settings ADD COLUMN week_start_day VARCHAR(10) DEFAULT 'monday'"
            ))
            conn.commit()
            logging.info("Migration: added week_start_day column")
        except Exception:
            pass  # Column already exists

_migrate()

app = FastAPI(title="Calendarr", docs_url=None, redoc_url=None)

app.include_router(auth_router.router, prefix="/api/auth", tags=["auth"])
app.include_router(users_router.router, prefix="/api/users", tags=["users"])
app.include_router(caldav_router.router, prefix="/api/caldav", tags=["caldav"])
app.include_router(settings_router.router, prefix="/api/settings", tags=["settings"])
app.include_router(profile_router.router, prefix="/api/profile", tags=["profile"])
app.include_router(local_router.router, prefix="/api/local", tags=["local"])
app.include_router(ical_router.router, prefix="/api/ical", tags=["ical"])
app.include_router(google_router.router, prefix="/api/google", tags=["google"])

FRONTEND_DIR = Path(__file__).parent.parent / "frontend"
app.mount("/static", StaticFiles(directory=str(FRONTEND_DIR)), name="static")


@app.get("/{full_path:path}")
async def spa_fallback(full_path: str):
    if full_path.startswith("api/"):
        raise HTTPException(status_code=404, detail="API endpoint not found")
    index = FRONTEND_DIR / "index.html"
    return FileResponse(str(index))


if __name__ == "__main__":
    port = int(os.environ.get("PORT", 8080))
    host = os.environ.get("HOST", "0.0.0.0")
    uvicorn.run(app, host=host, port=port)