function load() {
	Object.entries(init_state).forEach(([device_id, sub_devs]) => {
		let device = document.querySelector('#' + device_id);
		Object.entries(sub_devs).forEach(([sub_dev_id, state]) => {
			let sub_dev = device.querySelector('#' + sub_dev_id);
			let svg = sub_dev.querySelector('object').getSVGDocument().firstElementChild;
			if (state) {
				svg.classList.remove('off');
				svg.classList.add('on');
			}
		});
	});
}

function get_object_from_svg(svg) {
	var all_objects = document.getElementsByTagName("object");
	for (var i=0; i < all_objects.length; i++) {
		if (svg === all_objects[i].getSVGDocument().firstElementChild) {
			return all_objects[i];
		}
	}
	return null;
}

function toggle_outlet(svg) {
	let sub_dev = get_object_from_svg(svg).parentElement;
	let params = {
		device_id: sub_dev.parentElement.parentElement.id,
		sub_dev_id: sub_dev.id
	};
	let query = Object.keys(params)
		.map(k => encodeURIComponent(k) + '=' + encodeURIComponent(params[k]))
		.join('&');
	fetch(window.location.href + 'toggle?' + query)
	.then(function(response) {
		return response.json();
	})
	.then(function(json) {
		if (!json.ok) { throw new Error('HTTP error, status = ' + json.status + ', message = ' + json.message); }
		if (json[sub_dev.id]) {
			svg.classList.remove('off');
			svg.classList.add('on');
		} else {
			svg.classList.remove('on');
			svg.classList.add('off');
		}
	});
}

function edit_field(field) {
	let value = field.firstElementChild.innerText;
	let input = document.createElement('input');
	input.value = value;
	field.firstElementChild.replaceWith(input);

	let save = document.createElement('span');
	save.innerHTML = '&#xe801;';
	save.className = 'save font-awesome';
	save.setAttribute('onclick', 'save_field(this.parentElement)');
	field.children[1].replaceWith(save);
}

function save_field(field) {
	let value = field.firstElementChild.value;
	let device_id = field.parentElement.id;
	let sub_dev_id;
	if (field.parentElement.className.includes('sub_device')) {
		sub_dev_id = device_id;
		device_id = field.parentElement.parentElement.parentElement.id;
	} else {
		sub_dev_id = '';
	}
	let params = {
		device_id: device_id,
		sub_dev_id: sub_dev_id,
		field: field.classList[0],
		value: value
	};
	let query = Object.keys(params)
		.map(k => encodeURIComponent(k) + '=' + encodeURIComponent(params[k]))
		.join('&');

	fetch(window.location.href + 'edit?' + query)
	.then(function(response) {
		return response.json();
	})
	.then(function(json) {
		if (!json.ok) { throw new Error('HTTP error, status = ' + json.status + ', message = ' + json.message); }
		let span = document.createElement('span');
		span.innerText = json['value'];
		span.className = 'field_value';
		field.firstElementChild.replaceWith(span);

		let edit = document.createElement('span');
		edit.innerHTML = '&#xe800;';
		edit.className = 'edit font-awesome';
		edit.setAttribute('onclick', 'edit_field(this.parentElement)');
		field.children[1].replaceWith(edit);
	});
}

function new_device() {
	let params = {
		device_type: 'RelayDevice',
	};
	let query = Object.keys(params)
		.map(k => encodeURIComponent(k) + '=' + encodeURIComponent(params[k]))
		.join('&');

	fetch(window.location.href + 'new_device?' + query)
	.then(function(response) {
		return response.json();
	})
	.then(function(json) {
		let template = document.querySelector('#RelayDevice_template');
		let node = document.importNode(template.content, true);
		node.querySelector('.id').textContent = json.device_id;
		document.querySelector('#devices').appendChild(node);
		let children = document.querySelector('#devices').children;
		children[children.length - 1].id = json.device_id;
	});
}

function lock_device(device) {
	if (device.querySelector('.save')) { return; }
	let fields = device.querySelectorAll('.editable');
	fields.forEach(function(field) {
		field.querySelector('.edit').remove();
	});
	device.querySelector('.id').querySelector('.lock').remove();
	let unlock = document.createElement('span');
	unlock.innerHTML = '&#xf13e;';
	unlock.className = 'unlock font-awesome';
	unlock.setAttribute('onclick', 'unlock_device(this.parentElement.parentElement)');
	device.querySelector('.id').appendChild(unlock);
}

function unlock_device(device) {
	let fields = device.querySelectorAll('.editable');
	fields.forEach(function(field) {
		let edit = document.createElement('span');
		edit.innerHTML = '&#xe800;';
		edit.className = 'edit font-awesome';
		edit.setAttribute('onclick', 'edit_field(this.parentElement)');
		field.appendChild(edit);
	});
	device.querySelector('.id').querySelector('.unlock').remove();
	let lock = document.createElement('span');
	lock.innerHTML = '&#xe803;';
	lock.className = 'lock font-awesome';
	lock.setAttribute('onclick', 'lock_device(this.parentElement.parentElement)');
	device.querySelector('.id').appendChild(lock);
}