"""
Anexo76 - Aplicación SaaS para gestión de comercio exterior
Backend API con FastAPI + Keycloak + SQLAlchemy
"""
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from contextlib import asynccontextmanager
import logging

from core.config import settings
from core.database import init_db
from core.middleware import (
    TenantMiddleware,
    LicenseValidationMiddleware,
    RequestLoggingMiddleware
)
from api.v1.router import router as api_v1_router

# Configurar logging
logging.basicConfig(
    level=logging.INFO if not settings.DEBUG else logging.DEBUG,
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
)

logger = logging.getLogger(__name__)


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Lifecycle events"""
    # Startup
    logger.info("Starting Anexo76 API...")
    try:
        init_db()
        logger.info("Database initialized successfully")
    except Exception as e:
        logger.error(f"Error initializing database: {str(e)}")
    
    yield
    
    # Shutdown
    logger.info("Shutting down Anexo76 API...")


# Crear aplicación FastAPI
app = FastAPI(
    title="Anexo76 API",
    version=settings.APP_VERSION,
    description="Aplicación SaaS para gestión de comercio exterior conforme a Anexos 24, 31 y 22 del SAT",
    lifespan=lifespan,
    docs_url="/docs" if settings.DEBUG else None,
    redoc_url="/redoc" if settings.DEBUG else None
)

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

# Agregar middlewares personalizados
app.add_middleware(RequestLoggingMiddleware)
app.add_middleware(LicenseValidationMiddleware)
app.add_middleware(TenantMiddleware)

# Registrar routers
app.include_router(api_v1_router, prefix="/api/v1")


@app.get("/")
async def root():
    """Root endpoint"""
    return {
        "name": "Anexo76 API",
        "version": settings.APP_VERSION,
        "status": "running",
        "docs": "/docs" if settings.DEBUG else "disabled in production"
    }


@app.get("/health")
async def health_check():
    """Health check endpoint"""
    return {
        "status": "healthy",
        "environment": settings.ENVIRONMENT
    }