// Initialize the echarts instance based on the prepared dom

async function init() {
	const element = document.getElementById('graph')
	if (element === null) {
		return;
	}

	var myChart = echarts.init(element);

	try {
		const response = await fetch("/dashboard/dataset");
		if (!response.ok) {
			throw new Error(`Response status: ${response.status}`);
		}

		const option = await response.json();
		option.tooltip.formatter = function (params) {
			return new Date(params[0].data[0]).toLocaleString([], { day: 'numeric', month: 'short', year: 'numeric' })  +
				'<br />' +
				'Sum of Accounts: <span class="font-bold">' + params[0].data[1] + '</span> € <br />' +
				'Sum of Savings: <span class="font-bold">' + params[1].data[1] + '</span> €'
		};

		const chart = myChart.setOption(option);
		window.addEventListener('resize', function() {
		myChart.resize();
	});

	console.log("initialized charts");
	} catch (error) {
		console.error(error.message);
	}
	
	// Display the chart using the configuration items and data just specified.
}

init();