from dotenv import load_dotenv

load_dotenv() # Carica le variabili dal file .env
"""
Parking Manager Application
FastAPI + SQLite + Vanilla JS
"""
from fastapi import FastAPI, Request
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse, RedirectResponse, JSONResponse
from fastapi.middleware.cors import CORSMiddleware
from contextlib import asynccontextmanager
from slowapi import Limiter, _rate_limit_exceeded_handler
from slowapi.util import get_remote_address
from slowapi.errors import RateLimitExceeded
from datetime import datetime

from app import config
from app.routes.auth import router as auth_router
from app.routes.users import router as users_router
from app.routes.offices import router as offices_router
from app.routes.presence import router as presence_router
from app.routes.parking import router as parking_router
from database.connection import init_db

# Rate limiter setup
limiter = Limiter(key_func=get_remote_address)


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Initialize database on startup"""
    def log(msg):
        config.logger.info(f"[{datetime.now().strftime('%Y-%m-%d %H:%M:%S')}] {msg}")

    log("Starting Parking Manager application")
    
    # Caddy Integration Logs
    log("--- Caddy Integration & Handshake ---")
    
    # Step 1: Auth / Forward Auth
    log("1. Checking Caddy Forward Auth Configuration...")
    status = "ENABLED (Authelia)" if config.AUTHELIA_ENABLED else "DISABLED (Internal Auth)"
    log(f"   - Auth Mode: {status}")
    
    if config.AUTHELIA_ENABLED:
        log("   - Configuring Trusted Headers from Caddy:")
        log(f"     * User:   {config.AUTHELIA_HEADER_USER}")
        log(f"     * Name:   {config.AUTHELIA_HEADER_NAME}")
        log(f"     * Email:  {config.AUTHELIA_HEADER_EMAIL}")
        log(f"     * Groups: {config.AUTHELIA_HEADER_GROUPS}")
    else:
        log("   - No trusted headers configured (Standalone mode)")

    # Step 2: CORS / Origins
    log("2. Configuring Caddy CORS / Origins...")
    for origin in config.ALLOWED_ORIGINS:
        log(f"   - Trusted Origin: {origin}")

    init_db()
    log("3. Database Connection: ESTABLISHED")
    
    # Step 3: Network / Reachability
    local_url = f"http://{config.HOST}:{config.PORT}"
    # Try to find a public URL from allowed origins (excluding localhost/ips)
    public_candidates = [o for o in config.ALLOWED_ORIGINS if "localhost" not in o and "127.0.0.1" not in o and not o.startswith("*")]
    reachable_url = public_candidates[0] if public_candidates else local_url.replace("0.0.0.0", "localhost")

    log("4. Finalizing Caddy Handshake...")
    log(f"   - Listening on: {config.HOST}:{config.PORT}")
    log("--- Handshake Complete ---")
    
    log(f"feedback: App reachable via Caddy at {reachable_url}")
    
    yield
    log("Shutting down Parking Manager application")


app = FastAPI(title="Parking Manager", version="1.0.0", lifespan=lifespan)

# Add rate limiter
app.state.limiter = limiter
app.add_exception_handler(RateLimitExceeded, _rate_limit_exceeded_handler)

# CORS
app.add_middleware(
    CORSMiddleware,
    allow_origins=config.ALLOWED_ORIGINS,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# API Routes
app.include_router(auth_router)
app.include_router(users_router)
app.include_router(offices_router)
app.include_router(presence_router)
app.include_router(parking_router)

# Static Files
app.mount("/css", StaticFiles(directory=str(config.FRONTEND_DIR / "css")), name="css")
app.mount("/js", StaticFiles(directory=str(config.FRONTEND_DIR / "js")), name="js")
app.mount("/assets", StaticFiles(directory=str(config.FRONTEND_DIR / "assets")), name="assets")


# Page Routes
@app.get("/")
async def index():
    """Landing page"""
    return FileResponse(config.FRONTEND_DIR / "pages" / "landing.html")


@app.get("/login")
async def login_page():
    """Login page"""
    return FileResponse(config.FRONTEND_DIR / "pages" / "login.html")


@app.get("/register")
async def register_page():
    """Register page"""
    return FileResponse(config.FRONTEND_DIR / "pages" / "register.html")


@app.get("/dashboard")
async def dashboard():
    """Dashboard - redirect to team calendar"""
    return RedirectResponse(url="/team-calendar", status_code=302)


@app.get("/presence")
async def presence_page():
    """My Presence page"""
    return FileResponse(config.FRONTEND_DIR / "pages" / "presence.html")


@app.get("/team-calendar")
async def team_calendar_page():
    """Team Calendar page"""
    return FileResponse(config.FRONTEND_DIR / "pages" / "team-calendar.html")


@app.get("/team-rules")
async def team_rules_page():
    """Team Rules page"""
    return FileResponse(config.FRONTEND_DIR / "pages" / "team-rules.html")


@app.get("/admin/users")
async def admin_users_page():
    """Admin Users page"""
    return FileResponse(config.FRONTEND_DIR / "pages" / "admin-users.html")


@app.get("/admin/offices")
async def admin_offices_page():
    """Admin Offices page"""
    return FileResponse(config.FRONTEND_DIR / "pages" / "admin-offices.html")


@app.get("/profile")
async def profile_page():
    """Profile page"""
    return FileResponse(config.FRONTEND_DIR / "pages" / "profile.html")


@app.get("/settings")
async def settings_page():
    """Settings page"""
    return FileResponse(config.FRONTEND_DIR / "pages" / "settings.html")


@app.get("/parking-settings")
async def parking_settings_page():
    """Parking Settings page"""
    return FileResponse(config.FRONTEND_DIR / "pages" / "parking-settings.html")


@app.get("/favicon.svg")
async def favicon():
    """Favicon"""
    return FileResponse(config.FRONTEND_DIR / "favicon.svg", media_type="image/svg+xml")


@app.get("/health")
async def health():
    """Health check"""
    return {"status": "ok"}


if __name__ == "__main__":
    import uvicorn
    uvicorn.run("main:app", host=config.HOST, port=config.PORT, reload=True)