import { getToken } from "../../../actions/core/token";
import { azureHeaders } from "../../../actions/core/headers";
import { consoleLogger } from "../../../actions/core/logger";
import { hashAPIPath } from "../../../actions/core/hash";
import axios from "axios";
import { respondError, respondSuccess } from "../middleware/apiResponse";
import { getSession } from "next-auth/react";

const BASE_URL = process.env.API_ROOT || `http://localhost:${port}`;

const forbidden = (res) =>
    respondError(res, {
        status: 403,
        code: "FORBIDDEN",
        message: "Request not permitted"
    });

const isValidContainer = (value) =>
    typeof value === "string" &&
    value.length >= 3 &&
    value.length <= 63 &&
    /^[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$/.test(value);

export default async function ApiProxy(req, res) {
    res.setHeader("Allow", "GET");

    if (req.method !== "GET") {
        return respondError(res, {
            status: 405,
            code: "METHOD_NOT_ALLOWED",
            message: "Method not allowed"
        });
    }

    const containerName = req.query.container;

    if (typeof containerName === "undefined" || containerName === "") {
        return respondError(res, {
            status: 400,
            code: "MISSING_REQUIRED_QUERY",
            message: "container is required"
        });
    }

    if (!isValidContainer(containerName)) {
        return respondError(res, {
            status: 400,
            code: "INVALID_REQUEST",
            message: "Invalid request"
        });
    }

    const session = await getSession({ req });
    if (
        typeof session?.user?.id !== "string" ||
        session.user.id.length === 0 ||
        session.user.id !== containerName
    ) {
        return forbidden(res);
    }

    const token = await getToken();

    const queryUrl =
        "/api/file/getrepsblob?container=" + encodeURIComponent(containerName);

    try {
        const { data } = await axios.get(
            BASE_URL + queryUrl + hashAPIPath(queryUrl),
            azureHeaders(token.access_token)
        );
        return respondSuccess(res, data);
    } catch (error) {
        consoleLogger(error);
        return respondError(res, {
            status: 400,
            code: "GET_REPS_BLOB_PROXY_FAILED",
            message: "Failed to fetch representation blobs"
        });
    }
}