"""Main FastAPI application."""
from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

from app.core.config import settings
from app.core.database import init_db
from app.core.exceptions import AppException
from app.core.exception_handlers import app_exception_handler
from app.api.v1 import laws, analyses, contracts, signatures, phase2


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Application lifespan handler."""
    # Startup
    await init_db()
    yield
    # Shutdown
    pass


app = FastAPI(
    title=settings.APP_NAME,
    version=settings.APP_VERSION,
    lifespan=lifespan,
)

# Register exception handlers
app.add_exception_handler(AppException, app_exception_handler)

# CORS middleware
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],  # Configure in production
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Include routers
app.include_router(laws.router, prefix="/api/v1")
app.include_router(analyses.router, prefix="/api/v1")
app.include_router(contracts.router, prefix="/api/v1")
app.include_router(signatures.router, prefix="/api/v1")
app.include_router(phase2.router, prefix="/api/v1")


@app.get("/")
async def root():
    """Root endpoint."""
    return {
        "name": settings.APP_NAME,
        "version": settings.APP_VERSION,
        "status": "running"
    }


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