'use strict';
'require fs';
'require uci';
'require ui';
'require view.ruantiblock.tools as tools';

const btn_style_neutral  = 'btn'
const btn_style_action   = 'btn cbi-button-action';
const btn_style_positive = 'btn cbi-button-save important';
const btn_style_negative = 'btn cbi-button-reset important';
const btn_style_warning  = 'btn cbi-button-negative important'

return L.view.extend({
	statusTokenValue: null,

	disableButtons: function(bool, btn, elems=[]) {
		let btn_start   = elems[1] || document.getElementById("btn_start");
		let btn_destroy = elems[5] || document.getElementById("btn_destroy");
		let btn_enable  = elems[2] || document.getElementById("btn_enable");
		let btn_update  = elems[4] || document.getElementById("btn_update");
		let btn_tp      = elems[3] || document.getElementById("btn_tp");

		btn_start.disabled   = bool;
		btn_update.disabled  = bool;
		btn_destroy.disabled = bool;
		if(btn === btn_update) {
			btn_enable.disabled = false;
		} else {
			btn_enable.disabled = bool;
		};
		if(btn_tp) {
			btn_tp.disabled = bool;
		};
	},

	getAppStatus: function() {
		return Promise.all([
			fs.exec(tools.execPath, [ 'raw-status' ]),
			fs.exec(tools.execPath, [ 'total-proxy-status' ]),
			fs.exec(tools.execPath, [ 'vpn-route-status' ]),
			tools.getInitStatus(tools.appName),
			L.resolveDefault(fs.read(tools.tokenFile), 0),
			uci.load(tools.appName),
		]).catch(e => {
			ui.addNotification(null, E('p', _('Unable to execute or read contents')
				+ ': %s [ %s | %s | %s ]'.format(
					e.message, tools.execPath, 'tools.getInitStatus', 'uci.ruantiblock'
			)));
		});
	},

	setAppStatus: function(status_array, elems=[], force_app_code) {
		let section = uci.get(tools.appName, 'config');
		if(!status_array || typeof(section) !== 'object') {
			(elems[0] || document.getElementById("status")).innerHTML = tools.makeStatusString(1);
			ui.addNotification(null, E('p', _('Unable to read the contents')
				+ ': setAppStatus()'));
			this.disableButtons(true, null, elems);
			return;
		};

		let app_status_code       = (force_app_code) ? force_app_code : status_array[0].code;
		let tp_status_code        = status_array[1].code;
		let vpn_route_status_code = status_array[2].code;
		let enabled_flag          = status_array[3];
		let proxy_local_clients   = section.proxy_local_clients;
		let proxy_mode            = section.proxy_mode;
		let bllist_mode           = section.bllist_mode;
		let bllist_module         = section.bllist_module;
		let bllist_source         = section.bllist_source;

		let btn_enable = elems[2] || document.getElementById('btn_enable');
		if(enabled_flag == true) {
			btn_enable.onclick     = ui.createHandlerFn(
				this, this.serviceAction, 'disable', 'btn_enable');
			btn_enable.textContent = _('Enabled');
			btn_enable.className   = btn_style_positive;
		} else {
			btn_enable.onclick     = ui.createHandlerFn(
				this, this.serviceAction, 'enable', 'btn_enable');
			btn_enable.textContent = _('Disabled');
			btn_enable.className   = btn_style_negative;
		};

		let btn_tp = elems[3] || document.getElementById('btn_tp');
		if(btn_tp) {
			if(tp_status_code == 0) {
				btn_tp.onclick     = ui.createHandlerFn(
					this, this.appAction, 'total-proxy-off', 'btn_tp');
				btn_tp.textContent = _('Enabled');
				btn_tp.className   = btn_style_positive;
			} else {
				btn_tp.onclick     = ui.createHandlerFn(
					this, this.appAction, 'total-proxy-on', 'btn_tp');
				btn_tp.textContent = _('Disabled');
				btn_tp.className   = btn_style_negative;
			};
		};

		let btn_start   = elems[1] || document.getElementById('btn_start');
		let btn_update  = elems[4] || document.getElementById('btn_update');
		let btn_destroy = elems[5] || document.getElementById('btn_destroy');

		let btnStartStateOn = () => {
			btn_start.onclick     = ui.createHandlerFn(
				this, this.serviceAction, 'stop', 'btn_start');
			btn_start.textContent = _('Enabled');
			btn_start.className   = btn_style_positive;
		}

		let btnStartStateOff = () => {
			btn_start.onclick     = ui.createHandlerFn(
				this, this.serviceAction,'start', 'btn_start');
			btn_start.textContent = _('Disabled');
			btn_start.className   = btn_style_negative;
		}

		if(app_status_code == 0) {
			this.disableButtons(false, null, elems);
			btnStartStateOn();
			btn_destroy.disabled = false;
			btn_update.disabled  = false;
			if(btn_tp) {
				btn_tp.disabled = false;
			};
		}
		else if(app_status_code == 2) {
			this.disableButtons(false, null, elems);
			btnStartStateOff();
			btn_update.disabled = true;
			if(btn_tp) {
				btn_tp.disabled = true;
			};
		}
		else if(app_status_code == 3) {
			btnStartStateOff();
			this.disableButtons(true, btn_start, elems);
		}
		else if(app_status_code == 4) {
			btnStartStateOn();
			this.disableButtons(true, btn_update, elems);
		}
		else {
			ui.addNotification(null, E('p', _('Error')
				+ ' %s: return code = %s'.format(tools.execPath, app_status_code)));
			this.disableButtons(true, null, elems);
		};

		(elems[0] || document.getElementById("status")).innerHTML = tools.makeStatusString(
								app_status_code,
								proxy_mode,
								bllist_mode,
								bllist_module,
								bllist_source,
								tp_status_code,
								vpn_route_status_code);

		if(!L.Poll.active()) {
			L.Poll.start();
		};
	},

	serviceAction: function(action, button) {
		if(button) {
			let elem = document.getElementById(button);
			this.disableButtons(true, elem);
		};

		L.Poll.stop();

		return tools.handleServiceAction(tools.appName, action).then(() => {
			return this.getAppStatus().then(
				(status_array) => {
					this.setAppStatus(status_array);
				}
			);
		});
	},

	appAction: function(action, button) {
		if(button) {
			let elem = document.getElementById(button);
			this.disableButtons(true, elem);
		};

		L.Poll.stop();

		if(action === 'update') {
			this.getAppStatus().then(status_array => {
				this.setAppStatus(status_array, [], 4);
			});
		};

		return fs.exec_direct(tools.execPath, [ action ]).then(res => {
			return this.getAppStatus().then(
				(status_array) => {
					this.setAppStatus(status_array);
					ui.hideModal();
				}
			);
		});
	},

	statusPoll: function() {
		return fs.read(tools.tokenFile).then(v => {
			v = tools.normalizeValue(v);
			if(v != this.statusTokenValue) {
				this.getAppStatus().then(
					L.bind(this.setAppStatus, this)
				);
			}
			this.statusTokenValue = v;
		}).catch(e => {
			this.statusTokenValue = 0;
		});
	},

	dialogDestroy: function(ev) {
		ev.target.blur();
		let cancel_button = E('button', {
			'class': btn_style_neutral,
			'click': ui.hideModal,
		}, _('Cancel'));

		let shutdown_btn = E('button', {
			'class': btn_style_warning,
		}, _('Shutdown'));
		shutdown_btn.onclick = ui.createHandlerFn(this, () => {
			cancel_button.disabled = true;
			return this.appAction('destroy');
		});

		ui.showModal(_('Shutdown'), [
			E('div', { 'class': 'cbi-section' }, [
				E('p', _('The service will be disabled and all blacklist data will be deleted. Continue?')),
			]),
			E('div', { 'class': 'right' }, [
				shutdown_btn,
				' ',
				cancel_button,
			])
		]);
	},

	load: function() {
		return this.getAppStatus();
	},

	render: function(status_array) {
		if(!status_array) {
			return;
		};

		let section             = uci.get(tools.appName, 'config');
		let proxy_local_clients = (typeof(section) === 'object') ?
								section.proxy_local_clients : null;
		this.statusTokenValue   = (Array.isArray(status_array)) ?
								tools.normalizeValue(status_array[4]) : null;

		let status_string = E('div', {
			'id'   : 'status',
			'name' : 'status',
			'class': 'cbi-section-node',
		});

		let layout = E('div', { 'class': 'cbi-section-node' });

		function layout_append(elem, title, descr) {
			descr = (descr) ? E('div', { 'class': 'cbi-value-description' }, descr) : '';
			layout.append(
				E('div', { 'class': 'cbi-value' }, [
					E('label', { 'class': 'cbi-value-title' }, title),
					E('div', { 'class': 'cbi-value-field' }, [ elem, descr ]),
				])
			)
		};

		let btn_start = E('button', {
			'id'   : 'btn_start',
			'name' : 'btn_start',
			'class': btn_style_action,
		}, _('Enable'));
		layout_append(btn_start, _('Service'));

		let btn_enable = E('button', {
			'id'   : 'btn_enable',
			'name' : 'btn_enable',
			'class': btn_style_positive,
		}, _('Enable'));
		layout_append(btn_enable, _('Run at startup'));

		let btn_tp = E('button', {
			'id'   : 'btn_tp',
			'name' : 'btn_tp',
			'class': btn_style_positive,
		}, _('Enable'));
		if(proxy_local_clients == '0') {
			layout_append(btn_tp, _('Total-proxy'),
				_('All traffic goes through the proxy without applying rules'));
		};

		let btn_update = E('button', {
			'id'   : 'btn_update',
			'name' : 'btn_update',
			'class': btn_style_action,
		}, _('Update'));
		btn_update.onclick = ui.createHandlerFn(this, () => { this.appAction('update', 'btn_update') });
		layout_append(btn_update, _('Update blacklist'));

		let btn_destroy = E('button', {
			'id'   : 'btn_destroy',
			'name' : 'btn_destroy',
			'class': btn_style_negative,
		}, _('Shutdown'));
		btn_destroy.onclick = L.bind(this.dialogDestroy, this);

		layout_append(btn_destroy, _('Shutdown'),
			_('Complete service shutdown, as well as deleting ipsets and blacklist data'));

		this.setAppStatus(status_array, [
			status_string,
			btn_start,
			btn_enable,
			btn_tp,
			btn_update,
			btn_destroy,
		]);

		L.Poll.add(L.bind(this.statusPoll, this));

		return E([
			E('h2', { 'class': 'fade-in' }, _('Ruantiblock')),
			E('div', { 'class': 'cbi-section-descr fade-in' },
				E('a', {
				'href': 'https://github.com/gSpotx2f/ruantiblock_openwrt/wiki',
				'target': '_blank' },
				'https://github.com/gSpotx2f/ruantiblock_openwrt/wiki')
			),
			E('div', { 'class': 'cbi-section fade-in' }, [
				status_string,
				E('hr'),
			]),
			E('div', { 'class': 'cbi-section fade-in' },
				layout
			),
		]);
	},

	handleSave     : null,
	handleSaveApply: null,
	handleReset    : null,
});