from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

from app.api.router import api_router
from app.core.config import settings
from app.schemas.health import (
    HealthStatusResponse,
    ReadinessDependency,
    ReadinessStatusResponse,
)


def create_app() -> FastAPI:
    app = FastAPI(
        title=settings.app_name,
        version=settings.app_version,
        docs_url="/docs",
        redoc_url="/redoc",
    )
    app.add_middleware(
        CORSMiddleware,
        allow_origins=settings.cors_allowed_origin_list,
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )
    app.include_router(api_router, prefix=settings.api_prefix)

    @app.get("/health", response_model=HealthStatusResponse)
    async def healthcheck() -> HealthStatusResponse:
        return HealthStatusResponse(status="ok")

    @app.get("/health/ready", response_model=ReadinessStatusResponse)
    async def readiness_check() -> ReadinessStatusResponse:
        dependencies = [
            ReadinessDependency(
                name="database_url",
                configured=bool(settings.database_url),
                detail="DATABASE_URL is set.",
            ),
            ReadinessDependency(
                name="directus_base_url",
                configured=bool(settings.directus_base_url),
                detail="DIRECTUS_BASE_URL is set.",
            ),
            ReadinessDependency(
                name="directus_admin_token",
                configured=bool(settings.directus_admin_token),
                detail="DIRECTUS_ADMIN_TOKEN is optional for read-only auth checks.",
            ),
        ]
        status_value = "ready" if all(item.configured or item.name == "directus_admin_token" for item in dependencies) else "degraded"
        return ReadinessStatusResponse(
            status=status_value,
            app_env=settings.app_env,
            app_name=settings.app_name,
            dependencies=dependencies,
        )

    return app


app = create_app()
