# main.py
import logging
from datetime import datetime, timezone

from fastapi import Depends, FastAPI, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import HTMLResponse, RedirectResponse
from fastapi.staticfiles import StaticFiles
from sqlalchemy import text
from sqlalchemy.orm import Session

from app.api.main import api_router
from app.routes.frontend import router as frontend_router
from app.core.config import settings
from app.core.database import get_db
from app.core.lifespan import lifespan
from app.exceptions.handler import setup_exception_handlers
from app.exceptions import ServiceUnavailableException
from middleware.vendor_context import vendor_context_middleware

logger = logging.getLogger(__name__)

# FastAPI app with lifespan
app = FastAPI(
    title=settings.project_name,
    description=settings.description,
    version=settings.version,
    lifespan=lifespan,
)

# Setup custom exception handlers (unified approach)
setup_exception_handlers(app)

# Add CORS middleware
app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.allowed_hosts,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Add vendor context middleware (ADDED - must be after CORS)
app.middleware("http")(vendor_context_middleware)

# ========================================
# MOUNT STATIC FILES - ADD THIS SECTION
# ========================================
app.mount("/static", StaticFiles(directory="static"), name="static")
# ========================================

# Include API router
app.include_router(api_router, prefix="/api")
app.include_router(frontend_router)

# Public Routes (no authentication required)
@app.get("/", include_in_schema=False)
async def root():
    """Redirect root to documentation"""
    return RedirectResponse(url="/documentation")


@app.get("/health")
def health_check(db: Session = Depends(get_db)):
    """Health check endpoint"""
    try:
        # Test database connection
        db.execute(text("SELECT 1"))
        return {
            "status": "healthy",
            "timestamp": datetime.now(timezone.utc),
            "message": f"{settings.project_name} v{settings.version}",
            "docs": {
                "swagger": "/docs",
                "redoc": "/redoc",
                "openapi": "/openapi.json",
                "complete": "/documentation",
            },
            "features": [
                "Multi-tenant architecture with vendor isolation",
                "JWT Authentication with role-based access control",
                "Marketplace product import and curation",
                "Vendor catalog management",
                "Product-based inventory tracking",
                "Stripe Connect payment processing",
            ],
            "supported_marketplaces": [
                "Letzshop",
            ],
            "deployment_modes": [
                "Subdomain-based (production): vendor.platform.com",
                "Path-based (development): /vendor/vendorname/",
            ],
            "auth_required": "Most endpoints require Bearer token authentication",
        }
    except Exception as e:
        logger.error(f"Health check failed: {e}")
        raise ServiceUnavailableException("Service unhealthy")


@app.get("/documentation", response_class=HTMLResponse, include_in_schema=False)
async def documentation():
    """Redirect to documentation"""
    if settings.debug:
        return RedirectResponse(url="http://localhost:8001")
    return RedirectResponse(url=settings.documentation_url)


if __name__ == "__main__":
    import uvicorn
    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)