Ext.define('PMG.controller.QuarantineController', {
    extend: 'Ext.app.ViewController',
    xtype: 'controller.Quarantine',
    alias: 'controller.quarantine',

    updatePreview: function(raw, rec) {
	let preview = this.lookupReference('preview');

	if (!rec || !rec.data || !rec.data.id) {
	    preview.update('');
	    preview.setDisabled(true);
	    return;
	}

	let url = `/api2/htmlmail/quarantine/content?id=${rec.data.id}`;
	if (raw) {
	    url += '&raw=1';
	}
	preview.setDisabled(false);
	this.lookupReference('raw').setDisabled(false);
	this.lookupReference('download').setDisabled(false);
	preview.update("<iframe frameborder=0 width=100% height=100% sandbox='allow-same-origin' src='" + url +"'></iframe>");
    },

    multiSelect: function(selection) {
	let me = this;
	me.lookupReference('raw').setDisabled(true);
	me.lookupReference('download').setDisabled(true);
	me.lookupReference('mailinfo').setVisible(false);

	let preview = me.lookupReference('preview');
	preview.setDisabled(false);
	preview.update(`<h3 style="padding-left:5px;">${gettext('Multiple E-Mails selected')} (${selection.length})</h3>`);
    },

    toggleRaw: function(button) {
	let me = this;
	let list = me.lookupReference('list');
	let rec = list.selModel.getSelection()[0];
	me.lookupReference('mailinfo').setVisible(me.raw);
	me.raw = !me.raw;
	me.updatePreview(me.raw, rec);
    },

    btnHandler: function(button, e) {
	let me = this;
	let action = button.reference;
	let list = me.lookupReference('list');
	let selected = list.getSelection();
	me.doAction(action, selected);
    },

    doAction: function(action, selected) {
	if (!selected.length) {
	    return;
	}

	let list = this.lookupReference('list');

	if (selected.length > 1) {
	    let idlist = selected.map(item => item.data.id);
	    Ext.Msg.confirm(
		gettext('Confirm'),
		Ext.String.format(
		    gettext("Action '{0}' for '{1}' items"),
		    action, selected.length,
		),
		async function(button) {
		    if (button !== 'yes') {
			return;
		    }

		    list.mask(gettext('Processing...'), 'x-mask-loading');

		    const sliceSize = 2500, maxInFlight = 2;
		    let batches = [], batchCount = Math.ceil(selected.length / sliceSize);
		    for (let i = 0; i * sliceSize < selected.length; i++) {
			let sliceStart = i * sliceSize;
			let sliceEnd = Math.min(sliceStart + sliceSize, selected.length);
			batches.push(
			    PMG.Async.doQAction(
				action,
				idlist.slice(sliceStart, sliceEnd),
				i + 1,
				batchCount,
			    ),
			);
			if (batches.length >= maxInFlight) {
			    await Promise.allSettled(batches); // eslint-disable-line no-await-in-loop
			    batches = [];
			}
		    }
		    await Promise.allSettled(batches); // await possible remaining ones
		    list.unmask();
		    // below can be slow, we could remove directly from the in-memory store, but
		    // with lots of elements and some failures we could be quite out of sync?
		    list.getController().load();
		},
	    );
	    return;
	}

	PMG.Utils.doQuarantineAction(action, selected[0].data.id, function() {
	    let listController = list.getController();
	    listController.allowPositionSave = false;
	    // success -> remove directly to avoid slow store reload for a single-element action
	    list.getStore().remove(selected[0]);
	    listController.restoreSavedSelection();
	    listController.allowPositionSave = true;
	});
    },

    onSelectMail: function() {
	let me = this;
	let list = this.lookupReference('list');
	let selection = list.selModel.getSelection();
	if (selection.length > 1) {
	    me.multiSelect(selection);
	    return;
	}

	let rec = selection[0] || {};

	me.getViewModel().set('mailid', rec.data ? rec.data.id : '');
	me.updatePreview(me.raw || false, rec);
	me.lookupReference('mailinfo').setVisible(!!rec.data && !me.raw);
	me.lookupReference('mailinfo').update(rec.data);
    },

    openContextMenu: function(table, record, tr, index, event) {
	event.stopEvent();
	let me = this;
	let list = me.lookup('list');
	Ext.create('PMG.menu.QuarantineContextMenu', {
	    callback: action => me.doAction(action, list.getSelection()),
	}).showAt(event.getXY());
    },

    keyPress: function(table, record, item, index, event) {
	let me = this;
	let list = me.lookup('list');
	let key = event.getKey();
	let action = '';
	switch (key) {
	    case event.DELETE:
	    case 127:
		action = 'delete';
		break;
	    case Ext.event.Event.D:
	    case Ext.event.Event.D + 32:
		action = 'deliver';
		break;
	}

	if (action !== '') {
	    me.doAction(action, list.getSelection());
	}
    },

    control: {
	'button[reference=raw]': {
	    click: 'toggleRaw',
	},
	'pmgQuarantineList': {
	    selectionChange: 'onSelectMail',
	    itemkeypress: 'keyPress',
	    rowcontextmenu: 'openContextMenu',
	},
    },
});