"""
Daily Journal Prompt Generator - FastAPI Backend
Main application entry point
"""

import os
from pathlib import Path
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from contextlib import asynccontextmanager

from app.api.v1.api import api_router
from app.core.config import settings
from app.core.logging import setup_logging
from app.core.exception_handlers import setup_exception_handlers

# Setup logging
logger = setup_logging()

@asynccontextmanager
async def lifespan(app: FastAPI):
    """Lifespan context manager for startup and shutdown events."""
    # Startup
    logger.info("Starting Daily Journal Prompt Generator API")
    logger.info(f"Environment: {settings.ENVIRONMENT}")
    logger.info(f"Debug mode: {settings.DEBUG}")

    # Create data directory if it doesn't exist
    data_dir = Path(settings.DATA_DIR)
    data_dir.mkdir(exist_ok=True)
    logger.info(f"Data directory: {data_dir.absolute()}")

    yield

    # Shutdown
    logger.info("Shutting down Daily Journal Prompt Generator API")

# Create FastAPI app
app = FastAPI(
    title="Daily Journal Prompt Generator API",
    description="API for generating and managing journal writing prompts",
    version="1.0.0",
    docs_url="/docs",
    redoc_url="/redoc",
    lifespan=lifespan
)

# Setup exception handlers
setup_exception_handlers(app)

# Configure CORS
if settings.BACKEND_CORS_ORIGINS:
    app.add_middleware(
        CORSMiddleware,
        allow_origins=[str(origin) for origin in settings.BACKEND_CORS_ORIGINS],
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )

# Include API router
app.include_router(api_router, prefix="/api/v1")

@app.get("/")
async def root():
    """Root endpoint with API information."""
    return {
        "name": "Daily Journal Prompt Generator API",
        "version": "1.0.0",
        "description": "API for generating and managing journal writing prompts",
        "docs": "/docs",
        "redoc": "/redoc",
        "health": "/health"
    }

@app.get("/health")
async def health_check():
    """Health check endpoint."""
    return {"status": "healthy", "service": "daily-journal-prompt-api"}

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(
        "main:app",
        host=settings.HOST,
        port=settings.PORT,
        reload=settings.DEBUG,
        log_level="info"
    )