import assignIn from 'lodash/assignIn.js';

class lpError extends Error {
	constructor(response, statusCode = null) {
		super();

		this.message = 'An error occurred, please try again later.';
		this.statusCode = statusCode;
		this.errors = null;
		this.id = null;
		this.metadata = null;

		if (response.message) {
			this.message = response.message;
		} else if (response.errors && response.errors instanceof Array && response.errors.length && response.errors[0].message) {
			this.message = response.errors[0].message;
		}

		if (response.errors) {
			this.errors = response.errors;
		}
	}
}

window.fetchJson = (url, options) => {
	const fetchOptions = {
		method: 'GET',
		headers: {}
	};

	if (options) {
		assignIn(fetchOptions, options);
	}

	if (!fetchOptions.body && !fetchOptions.headers['Content-Type']) {
		fetchOptions.headers['Content-Type'] = 'application/json';
	}

	function parseJSON(response) {
		return new Promise((resolve, reject) => {
			response
				.text()
				.then((text) => {
					let json;

					try {
						json = text ? JSON.parse(text) : {};
					} catch (err) {
						json = { message: response };
					}

					return resolve({
						status: response.status,
						ok: response.ok,
						json,
					});
				})
				.catch(err => reject(err));
		});
	}

	return new Promise((resolve, reject) => {
		fetch(url, fetchOptions)
			.then(parseJSON)
			.then((response) => {
				if (response.ok) {
					return resolve(response.json);
				}
				if (response.status && (response.status === 401 || response.status === 403)) {
					bus.$emit('unauthorized');
					return;
				}

				if (response.json) {
					return reject(new lpError(response.json, response.status));
				}

				return reject(new lpError(response));
			})
			.catch((err) => {
				if (err && err instanceof TypeError && err.message === 'Failed to fetch') {
					err = {};
				}

				return reject(new lpError(err));
			});
	});
};

window.readCookie = function (name) {
	const nameEQ = `${name}=`;
	const ca = document.cookie.split(';');
	for (let i = 0; i < ca.length; i++) {
		let c = ca[i];
		while (c.charAt(0) == ' ') c = c.substring(1, c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
	}
	return null;
};

window.createCookie = function (name, value, days) {
	if (days) {
		const date = new Date();
		date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
		var expires = `; expires=${date.toGMTString()}`;
	} else var expires = '';
	document.cookie = `${name}=${value}${expires}; path=/`;
};

window.getElementIndex = function (node) {
	let index = 0;
	while ((node = node.previousElementSibling)) {
		index++;
	}
	return index;
};

window.arrayMove = function (inputArray, oldIndex, newIndex) {
	const array = inputArray.slice();
	const element = array[oldIndex];
	array.splice(oldIndex, 1);
	array.splice(newIndex, 0, element);
	return array;
};