class Api {
	getAuthors (params, cb) {
		const xhr = new XMLHttpRequest();
		params = Object.entries(params).map(([key, value]) => `${key}=${value}`).join('&');
		params = params !== '' ? `&${params}` : '';
		xhr.open("GET", `/api/v/1.0/get-authors?response_format=json${params}`, true);
		xhr.onreadystatechange = function (event) {
			//console.log(event);
			if (this.readyState != 4) return;
			cb(JSON.parse(this.responseText).response);
		};
		xhr.send();
	}
	
	getMuzic (params, cb) {
		const xhr = new XMLHttpRequest();
		params = Object.entries(params).map(([key, value]) => `${key}=${value}`).join('&');
		params = params !== '' ? `&${params}` : '';
		xhr.open("GET", `/api/v/1.0/get-muzic?response_format=json${params}`, true);
		xhr.onreadystatechange = function (event) {
			//console.log(event);
			if (this.readyState != 4) return;
			cb(JSON.parse(this.responseText).response);
		};
		xhr.send();
	}
	
	createMuzic (author_id, name, data=null, cb) {
		data = data === null ? undefined : data;
		const xhr = new XMLHttpRequest();
		xhr.open("POST", `/api/v/1.0/create-item?response_format=json`, true);
		xhr.setRequestHeader('Content-type', 'application/json; charset=utf-8');
		xhr.onreadystatechange = function (event) {
			//console.log(event);
			if (this.readyState != 4) return;
			cb(JSON.parse(this.responseText).response);
		};
		xhr.send(JSON.stringify({
			type: 'muzic',
			name,
			author_id,
			data
		}));
	}
}

const api = new Api();