import os

from gradio.routes import App
from fastapi import Request
from fastapi.responses import JSONResponse, RedirectResponse

from dream_customs import zerogpu  # noqa: F401
from dream_customs.runtime_env import auto_load_runtime_env_json
from dream_customs.ui.app import build_demo


auto_load_runtime_env_json()
demo = build_demo()


_ORIGINAL_CREATE_APP = App.create_app


def _install_gradio_api_aliases(app, blocks) -> None:
    existing_paths = {getattr(route, "path", "") for route in app.routes}

    if "/gradio_api/info" not in existing_paths:
        @app.get("/gradio_api/info", include_in_schema=False)
        async def gradio_api_info_alias() -> JSONResponse:
            """Compatibility for Hugging Face's generated agents.md schema URL."""

            return JSONResponse(blocks.get_api_info())

    async def _redirect_to_gradio4_path(request: Request) -> RedirectResponse:
        suffix = request.url.path.removeprefix("/gradio_api")
        target = suffix or "/"
        if request.url.query:
            target = f"{target}?{request.url.query}"
        return RedirectResponse(url=target, status_code=307)

    for alias_path in (
        "/gradio_api/queue/join",
        "/gradio_api/queue/data",
        "/gradio_api/upload",
    ):
        if alias_path not in existing_paths:
            app.add_api_route(
                alias_path,
                _redirect_to_gradio4_path,
                methods=["GET", "POST"],
                include_in_schema=False,
            )


def _create_app_with_gradio_api_aliases(blocks, app_kwargs=None, auth_dependency=None):
    app = _ORIGINAL_CREATE_APP(blocks, app_kwargs=app_kwargs, auth_dependency=auth_dependency)
    _install_gradio_api_aliases(app, blocks)
    return app


App.create_app = staticmethod(_create_app_with_gradio_api_aliases)
_install_gradio_api_aliases(demo.app, demo)


if __name__ == "__main__":
    demo.launch(
        server_name=os.getenv("GRADIO_SERVER_NAME", "0.0.0.0"),
        server_port=int(os.getenv("GRADIO_SERVER_PORT", "7860")),
        show_api=False,
        show_error=True,
    )