"""FastAPI application entrypoint."""
from __future__ import annotations

from fastapi import FastAPI, Request
from fastapi.responses import JSONResponse

from .api.routes import router
from .core.errors import AppError
from .core.logging import configure_logging, get_logger


def create_app() -> FastAPI:
    """Create and configure the FastAPI app."""
    configure_logging()
    app = FastAPI(title="Azure Voice Agent")

    @app.exception_handler(AppError)
    async def app_error_handler(_: Request, exc: AppError) -> JSONResponse:
        log = get_logger(error_code=exc.code)
        log.warning("handled_app_error", message=exc.message, details=exc.details)
        return JSONResponse(
            status_code=400,
            content={"error": {"code": exc.code, "message": exc.message}},
        )

    @app.exception_handler(Exception)
    async def unhandled_error_handler(_: Request, exc: Exception) -> JSONResponse:
        log = get_logger()
        log.error("unhandled_error", error=str(exc))
        return JSONResponse(
            status_code=500,
            content={"error": {"code": "internal_error", "message": "Server error."}},
        )

    app.include_router(router)
    return app


app = create_app()