import type child_process from "child_process";
import { describe, beforeAll, afterAll } from "vitest";

let etapiAuthToken: string | undefined;

const getEtapiAuthorizationHeader = (): string => "Basic " + Buffer.from(`etapi:${etapiAuthToken}`).toString("base64");

const PORT: string = "9999";
const HOST: string = "http://localhost:" + PORT;

type SpecDefinitionsFunc = () => void;

function describeEtapi(description: string, specDefinitions: SpecDefinitionsFunc): void {
    describe(description, () => {
        let appProcess: ReturnType<typeof child_process.spawn>;

        beforeAll(async () => {});

        afterAll(() => {});

        specDefinitions();
    });
}

async function getEtapiResponse(url: string): Promise<Response> {
    return await fetch(`${HOST}/etapi/${url}`, {
        method: "GET",
        headers: {
            Authorization: getEtapiAuthorizationHeader()
        }
    });
}

async function getEtapi(url: string): Promise<any> {
    const response = await getEtapiResponse(url);
    return await processEtapiResponse(response);
}

async function getEtapiContent(url: string): Promise<Response> {
    const response = await fetch(`${HOST}/etapi/${url}`, {
        method: "GET",
        headers: {
            Authorization: getEtapiAuthorizationHeader()
        }
    });

    checkStatus(response);

    return response;
}

async function postEtapi(url: string, data: Record<string, unknown> = {}): Promise<any> {
    const response = await fetch(`${HOST}/etapi/${url}`, {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
            Authorization: getEtapiAuthorizationHeader()
        },
        body: JSON.stringify(data)
    });
    return await processEtapiResponse(response);
}

async function postEtapiContent(url: string, data: BodyInit): Promise<Response> {
    const response = await fetch(`${HOST}/etapi/${url}`, {
        method: "POST",
        headers: {
            "Content-Type": "application/octet-stream",
            Authorization: getEtapiAuthorizationHeader()
        },
        body: data
    });

    checkStatus(response);

    return response;
}

async function putEtapi(url: string, data: Record<string, unknown> = {}): Promise<any> {
    const response = await fetch(`${HOST}/etapi/${url}`, {
        method: "PUT",
        headers: {
            "Content-Type": "application/json",
            Authorization: getEtapiAuthorizationHeader()
        },
        body: JSON.stringify(data)
    });
    return await processEtapiResponse(response);
}

async function putEtapiContent(url: string, data?: BodyInit): Promise<Response> {
    const response = await fetch(`${HOST}/etapi/${url}`, {
        method: "PUT",
        headers: {
            "Content-Type": "application/octet-stream",
            Authorization: getEtapiAuthorizationHeader()
        },
        body: data
    });

    checkStatus(response);

    return response;
}

async function patchEtapi(url: string, data: Record<string, unknown> = {}): Promise<any> {
    const response = await fetch(`${HOST}/etapi/${url}`, {
        method: "PATCH",
        headers: {
            "Content-Type": "application/json",
            Authorization: getEtapiAuthorizationHeader()
        },
        body: JSON.stringify(data)
    });
    return await processEtapiResponse(response);
}

async function deleteEtapi(url: string): Promise<any> {
    const response = await fetch(`${HOST}/etapi/${url}`, {
        method: "DELETE",
        headers: {
            Authorization: getEtapiAuthorizationHeader()
        }
    });
    return await processEtapiResponse(response);
}

async function processEtapiResponse(response: Response): Promise<any> {
    const text = await response.text();

    if (response.status < 200 || response.status >= 300) {
        throw new Error(`ETAPI error ${response.status}: ${text}`);
    }

    return text?.trim() ? JSON.parse(text) : null;
}

function checkStatus(response: Response): void {
    if (response.status < 200 || response.status >= 300) {
        throw new Error(`ETAPI error ${response.status}`);
    }
}

export default {
    describeEtapi,
    getEtapi,
    getEtapiResponse,
    getEtapiContent,
    postEtapi,
    postEtapiContent,
    putEtapi,
    putEtapiContent,
    patchEtapi,
    deleteEtapi
};