import logging
from typing import Any, Dict, List, Optional

from starlette.applications import Starlette
from starlette.exceptions import HTTPException
from starlette.requests import Request
from starlette.responses import HTMLResponse, JSONResponse
from starlette.routing import Mount, Route

from pait.api_doc.html import get_redoc_html as _get_redoc_html
from pait.api_doc.html import get_swagger_ui_html as _get_swagger_ui_html
from pait.api_doc.open_api import PaitOpenApi
from pait.model.core import PaitCoreModel

from ._load_app import load_app


def add_doc_route(
    app: Starlette,
    prefix: str = "/",
    pin_code: str = "",
    title: str = "Pait Doc",
    open_api_tag_list: Optional[List[Dict[str, Any]]] = None,
) -> None:
    if pin_code:
        logging.info(f"doc route start pin code:{pin_code}")

    def _get_request_pin_code(request: Request) -> Optional[str]:
        r_pin_code: Optional[str] = request.query_params.get("pin_code", None)
        if pin_code:
            if r_pin_code != pin_code:
                raise HTTPException(
                    status_code=404,
                    detail=(
                        "The requested URL was not found on the server. If you entered"
                        " the URL manually please check your spelling and try again."
                    ),
                )
        return r_pin_code

    def _get_open_json_url(request: Request) -> str:
        r_pin_code: Optional[str] = _get_request_pin_code(request)
        openapi_json_url: str = (
            f"http://{request.url.hostname}:{request.url.port}{'/'.join(request.url.path.split('/')[:-1])}/openapi.json"
        )
        if r_pin_code:
            openapi_json_url += f"?pin_code={r_pin_code}"
        return openapi_json_url

    def get_redoc_html(request: Request) -> HTMLResponse:
        return HTMLResponse(_get_redoc_html(_get_open_json_url(request), title))

    def get_swagger_ui_html(request: Request) -> HTMLResponse:
        return HTMLResponse(_get_swagger_ui_html(_get_open_json_url(request), title))

    def openapi_route(request: Request) -> JSONResponse:
        _get_request_pin_code(request)
        pait_dict: Dict[str, PaitCoreModel] = load_app(request.app)
        pait_openapi: PaitOpenApi = PaitOpenApi(
            pait_dict,
            title=title,
            open_api_server_list=[{"url": f"http://{request.url.hostname}:{request.url.port}", "description": ""}],
            open_api_tag_list=open_api_tag_list,
        )
        return JSONResponse(pait_openapi.open_api_dict)

    route: Mount = Mount(
        prefix,
        name="api doc",
        routes=[
            Route("/redoc", get_redoc_html, methods=["GET"]),
            Route("/swagger", get_swagger_ui_html, methods=["GET"]),
            Route("/openapi.json", openapi_route, methods=["GET"]),
        ],
    )
    app.routes.append(route)
