from __future__ import annotations

import os
from pathlib import Path

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

from app.matcher import CatalogMatcher
from app.models import MatchRequest, MatchResponse

BASE_DIR = Path(__file__).resolve().parent.parent
CATALOG_PATH = Path(os.environ.get("CATALOG_PATH", BASE_DIR / "catalog_excel.csv"))
MATCHER = CatalogMatcher(CATALOG_PATH)
TEST_INFO_ROUTE_ENV = "ENABLE_TEST_INFO_ROUTE"


def match(request: MatchRequest) -> MatchResponse:
    return MatchResponse(results=[MATCHER.match(message) for message in request.messages])


def create_app(*, enable_test_info_route: bool = False) -> FastAPI:
    # OpenAPI/Swagger routes are disabled so the production application exposes
    # exactly the single endpoint required by the task.
    application = FastAPI(
        title="Offline catalog matcher",
        version="0.2.0",
        docs_url=None,
        redoc_url=None,
        openapi_url=None,
    )
    application.add_api_route(
        "/match", match, methods=["POST"], response_model=MatchResponse
    )

    if enable_test_info_route:
        from app.dev_routes import register_test_info_route

        application.add_middleware(
            CORSMiddleware,
            allow_origins=["*"],
            allow_methods=["GET", "POST"],
            allow_headers=["Content-Type"],
        )
        register_test_info_route(application, MATCHER)

    return application


def _test_info_route_enabled() -> bool:
    return os.environ.get(TEST_INFO_ROUTE_ENV, "").strip().lower() in {
        "1",
        "true",
        "yes",
        "on",
    }


app = create_app(enable_test_info_route=_test_info_route_enabled())