import axios from "axios";
import logger from "./logger.mjs";

const BackendApi = function (config, token) {
	this.config = config;
	this.token = token;

	this.axios = axios.create({
		baseURL: config.baseUrl,
		timeout: 90000,
	});
};

/**
 * @param {string} token
 */
BackendApi.prototype.setToken = function (token) {
	this.token = token;
};

/**
 * @param {bool} returnOnError
 */
BackendApi.prototype._prepareOptions = function (returnOnError) {
	const options = {
		headers: {
			Accept: "application/json",
		},
	};
	if (this.token) {
		options.headers.Authorization = `Bearer ${this.token}`;
	}
	if (returnOnError) {
		options.validateStatus = () => true;
	}
	return options;
};

/**
 * @param {*} response
 * @param {function} resolve
 * @param {function} reject
 * @param {bool} returnOnError
 */
BackendApi.prototype._handleResponse = (
	response,
	resolve,
	reject,
	returnOnError,
) => {
	logger("Response data:", response.data);
	if (
		!returnOnError &&
		typeof response.data === "object" &&
		typeof response.data.error === "object"
	) {
		if (
			typeof response.data === "object" &&
			typeof response.data.error === "object" &&
			typeof response.data.error.message !== "undefined"
		) {
			reject(
				new Error(
					`${response.data.error.code}: ${response.data.error.message}`,
				),
			);
		} else {
			reject(new Error(`Error ${response.status}`));
		}
	} else {
		resolve(response.data);
	}
};

/**
 * @param {*} err
 * @param {function} resolve
 * @param {function} reject
 * @param {bool} returnOnError
 */
BackendApi.prototype._handleError = (err, resolve, reject, returnOnError) => {
	logger("Axios Error:", err);
	if (returnOnError) {
		resolve(typeof err.response.data !== "undefined" ? err.response.data : err);
	} else {
		reject(err);
	}
};

/**
 * @param {string} method
 * @param {string} path
 * @param {bool}   [returnOnError]
 * @param {*}      [data]
 * @returns {Promise<object>}
 */
BackendApi.prototype.request = function (method, path, returnOnError, data) {
	logger(method.toUpperCase(), path);
	const options = this._prepareOptions(returnOnError);

	return new Promise((resolve, reject) => {
		const opts = {
			method: method,
			url: path,
			...options,
		};
		if (data !== undefined && data !== null) {
			opts.data = data;
		}

		this.axios(opts)
			.then((response) => {
				this._handleResponse(response, resolve, reject, returnOnError);
			})
			.catch((err) => {
				this._handleError(err, resolve, reject, returnOnError);
			});
	});
};

/**
 * @param {string} path
 * @param {form}   form
 * @param {bool}   [returnOnError]
 * @returns {Promise<object>}
 */
BackendApi.prototype.postForm = function (path, form, returnOnError) {
	logger("POST", this.config.baseUrl + path);
	const options = this._prepareOptions(returnOnError);

	return new Promise((resolve, reject) => {
		const opts = {
			...options,
			...form.getHeaders(),
		};

		this.axios
			.post(path, form, opts)
			.then((response) => {
				this._handleResponse(response, resolve, reject, returnOnError);
			})
			.catch((err) => {
				this._handleError(err, resolve, reject, returnOnError);
			});
	});
};

export default BackendApi;