'use strict';
'require view';
'require fs';
'require ui';
'require rpc';

const css = '								\
	.controls {							\
		display: flex;					\
		margin: .5em 0 1em 0;			\
		flex-wrap: wrap;				\
		justify-content: space-around;	\
	}									\
										\
	.controls > * {						\
		padding: .25em;					\
		white-space: nowrap;			\
		flex: 1 1 33%;					\
		box-sizing: border-box;			\
		display: flex;					\
		flex-wrap: wrap;				\
	}									\
										\
	.controls > *:first-child,			\
	.controls > * > label {				\
		flex-basis: 100%;				\
		min-width: 250px;				\
	}									\
										\
	.controls > *:nth-child(2),			\
	.controls > *:nth-child(3) {		\
		flex-basis: 20%;				\
	}									\
										\
	.controls > * > .btn {				\
		flex-basis: 20px;				\
		text-align: center;				\
	}									\
										\
	.controls > * > * {					\
		flex-grow: 1;					\
		align-self: center;				\
	}									\
										\
	.controls > div > input {			\
		width: auto;					\
	}									\
										\
	.td.version,						\
	.td.size {							\
		white-space: nowrap;			\
	}									\
										\
	/* bootstrap sets 15%; shrink */	\
	#packages .td.cbi-section-actions {	\
		width: auto;					\
	}									\
										\
	ul.deps, ul.deps ul, ul.errors {	\
		margin-left: 1em;				\
	}									\
										\
	ul.deps li, ul.errors li {			\
		list-style: none;				\
	}									\
										\
	ul.deps li:before {					\
		content: "↳";					\
		display: inline-block;			\
		width: 1em;						\
		margin-left: -1em;				\
	}									\
										\
	ul.deps li > span {					\
		white-space: nowrap;			\
	}									\
										\
	ul.errors li {						\
		color: #c44;					\
		font-size: 90%;					\
		font-weight: bold;				\
		padding-left: 1.5em;			\
	}									\
										\
	ul.errors li:before {				\
		content: "⚠";					\
		display: inline-block;			\
		width: 1.5em;					\
		margin-left: -1.5em;			\
	}									\
';

const isReadonlyView = !L.hasViewPermission() || null;

const callMountPoints = rpc.declare({
	object: 'luci',
	method: 'getMountPoints',
	expect: { result: [] }
});

const packages = {
	available: { providers: {}, pkgs: {} },
	installed: { providers: {}, pkgs: {} }
};

const languages = ['en'];

let currentDisplayMode = 'available'
const currentDisplayRows = [];

function parseList(s, dest)
{
	const re = /([^\n]*)\n/g;
	let pkg = null, key = null, val = null, m;
	let list, stat, mode, installed;

	while ((m = re.exec(s)) !== null) {
		if (m[1].match(/^\s(.*)$/)) {
			if (pkg !== null && key !== null && val !== null)
				val += '\n' + RegExp.$1.trim();

			continue;
		}

		if (key !== null && val !== null) {
			switch (key) {
			case 'package':
				pkg = { name: val };
				break;

			case 'depends':
			case 'provides':
				list = val.split(/\s*,\s*/);
				if (list.length !== 1 || list[0].length > 0)
					pkg[key] = list;
				break;

			case 'installed-time':
				pkg.installtime = new Date(+val * 1000);
				break;

			case 'installed-size':
				pkg.installsize = +val;
				break;

			case 'status':
				stat = val.split(/\s+/);
				mode = stat[1];
				installed = stat[2];

				switch (mode) {
				case 'user':
				case 'hold':
					pkg[mode] = true;
					break;
				}

				switch (installed) {
				case 'installed':
					pkg.status = ['installed'];
					break;
				}
				break;

			case 'essential':
				if (val === 'yes')
					pkg.essential = true;
				break;

			case 'size':
				pkg.size = +val;
				break;

			case 'architecture':
			case 'auto-installed':
			case 'filename':
			case 'sha256sum':
			case 'section':
				break;

			default:
				pkg[key] = val;
				break;
			}

			key = val = null;
		}

		if (m[1].trim().match(/^([\w-]+)\s*:(.+)$/)) {
			key = RegExp.$1.toLowerCase();
			val = RegExp.$2.trim();
		}
		else if (pkg) {
			dest.pkgs[pkg.name] = pkg;

			const provides = dest.providers[pkg.name] ? [] : [ pkg.name ];

			if (pkg.provides)
				provides.push.apply(provides, pkg.provides);

			provides.forEach(function(p) {
				dest.providers[p] = dest.providers[p] || [];
				dest.providers[p].push(pkg);
			});
		}
	}
}

function parseApkQueryJson(s, dest) {
	// Parse the raw JSON text string into an array
	let rawData;
	try {
		rawData = JSON.parse(s);
	} catch (e) {
		console.error("Failed to parse APK JSON:", e);
		return;
	}
	// Ensure rawData is actually an array before iterating
	if (!Array.isArray(rawData))
		return;
	// Ensure our storage objects exist on the destination
	dest.pkgs = dest.pkgs || {};
	dest.providers = dest.providers || {};

	// Single pass through each item in the new JSON array
	for (const item of rawData) {

		// Rename 'file-size' to 'size' while pulling out 'name'
		const { name, 'file-size': size, ...attributes } = item;

		// Construct the package object with the expected 'size' key
		const pkg = { name, size, ...attributes };

		// Add/Update the package in the main map
		dest.pkgs[name] = pkg;

		// Determine all provided names (a package always provides itself)
		const provides = [name, ...(Array.isArray(pkg.provides) ? pkg.provides : [])];
		for (let p of provides) {
			p = p.split('=')[0]; // Handle cases where provides are versioned
			dest.providers[p] = dest.providers[p] || [];
			if (!dest.providers[p].includes(pkg))
				dest.providers[p].push(pkg);
		}
	}
}

function parsePackageData(s, dest) {
	if (!s) return;

	// Check if the input is JSON (starts with [)
	if (s.trim().charAt(0) === '[') {
		parseApkQueryJson(s, dest);
	} else {
		parseList(s, dest);
	}
}

function isPkgInstalled(pkg) {
	return pkg && Array.isArray(pkg.status) && pkg.status.includes('installed');
}

function display(pattern)
{
	const src = packages[currentDisplayMode === 'updates' ? 'installed' : currentDisplayMode];
	const pagers = document.querySelectorAll('.controls > .pager');
	let i18n_filter = null;

	currentDisplayRows.length = 0;

	if (typeof(pattern) === 'string' && pattern.length > 0)
		pattern = new RegExp(pattern.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'), 'ig');

	switch (document.querySelector('input[name="filter_i18n"]:checked').value) {
	case 'all':
		i18n_filter = /^luci-i18n-/;
		break;

	case 'lang':
		i18n_filter = new RegExp('^luci-i18n-(base-.+|.+-(' + languages.join('|') + '))$');
		break;
	}

	for (let name in src.pkgs) {
		const pkg = src.pkgs[name];
		let desc = pkg.description || '';
		let altsize = null;

		if (!pkg.size && packages.available.pkgs[name])
			altsize = packages.available.pkgs[name].size;

		if (!desc && packages.available.pkgs[name])
			desc = packages.available.pkgs[name].description || '';

		desc = desc.split(/\n/);
		desc = desc[0].trim() + (desc.length > 1 ? '…' : '');

		if ((pattern instanceof RegExp) &&
		    !name.match(pattern) && !desc.match(pattern))
			continue;

		if (name.indexOf('luci-i18n-') === 0 && (!(i18n_filter instanceof RegExp) || !name.match(i18n_filter)))
			continue;

		let btn, ver;

		if (currentDisplayMode === 'updates') {
			const avail = packages.available.pkgs[name];
			const inst  = packages.installed.pkgs[name];

			if (!isPkgInstalled(inst))
				continue;

			if (!avail || compareVersion(avail.version, pkg.version) <= 0)
				continue;

			ver = '%s » %s'.format(
				truncateVersion(pkg.version || '-'),
				truncateVersion(avail.version || '-'));

			btn = E('div', {
				'class': 'btn cbi-button-positive',
				'data-package': name,
				'data-action': 'upgrade',
				'click': handleInstall
			}, _('Upgrade…'));
		}
		else if (currentDisplayMode === 'installed') {
			if (!isPkgInstalled(pkg))
				continue;

			ver = truncateVersion(pkg.version || '-');
			btn = E('div', {
				'class': 'btn cbi-button-negative',
				'data-package': name,
				'click': handleRemove
			}, _('Remove…'));
		}
		else {
			const inst = packages.installed.pkgs[name];

			ver = truncateVersion(pkg.version || '-');

			if (!isPkgInstalled(inst))
				btn = E('div', {
					'class': 'btn cbi-button-action',
					'data-package': name,
					'data-action': 'install',
					'click': handleInstall
				}, _('Install…'));
			else if (isPkgInstalled(inst) && inst.version !== pkg.version)
				btn = E('div', {
					'class': 'btn cbi-button-positive',
					'data-package': name,
					'data-action': 'upgrade',
					'click': handleInstall
				}, _('Upgrade…'));
			else
				btn = E('div', {
					'class': 'btn cbi-button-neutral',
					'disabled': 'disabled'
				}, _('Installed'));
		}

		name = '%h'.format(name);
		desc = '%h'.format(desc || '-');

		if (pattern) {
			name = name.replace(pattern, '<ins>$&</ins>');
			desc = desc.replace(pattern, '<ins>$&</ins>');
		}

		currentDisplayRows.push([
			name,
			ver,
			[ pkg.size || altsize || 0,
			  pkg.size ? '%1024mB'.format(pkg.size)
			           : (altsize ? '~%1024mB'.format(altsize) : '-') ],
			desc,
			btn
		]);
	}

	currentDisplayRows.sort(function(a, b) {
		if (a[0] < b[0])
			return -1;
		else if (a[0] > b[0])
			return 1;
		else
			return 0;
	});

	for (let pager of pagers) {
		pager.parentNode.style.display = '';
		pager.setAttribute('data-offset', 100);
	}

	handlePage({ target: pagers[0].querySelector('.prev') });
}

function handlePage(ev)
{
	const filter = document.querySelector('input[name="filter"]');
	let offset = +ev.target.parentNode.getAttribute('data-offset');
	const next = ev.target.classList.contains('next');
	const pagers = document.querySelectorAll('.controls > .pager');

	if ((next && (offset + 100) >= currentDisplayRows.length) ||
	    (!next && (offset < 100)))
	    return;

	offset += next ? 100 : -100;

	for (let pager of pagers) {
		pager.setAttribute('data-offset', offset);
		pager.querySelector('.text').firstChild.data = currentDisplayRows.length
			? _('Displaying %d-%d of %d').format(1 + offset, Math.min(offset + 100, currentDisplayRows.length), currentDisplayRows.length)
			: _('No packages');

		if (offset < 100)
			pager.querySelector('.prev').setAttribute('disabled', 'disabled');
		else
			pager.querySelector('.prev').removeAttribute('disabled');

		if ((offset + 100) >= currentDisplayRows.length)
			pager.querySelector('.next').setAttribute('disabled', 'disabled');
		else
			pager.querySelector('.next').removeAttribute('disabled');
	}

	let placeholder = _('No information available');

	if (filter.value)
		placeholder = [
			E('span', {}, _('No packages matching "<strong>%h</strong>".').format(filter.value)), ' (',
			E('a', { href: '#', click: handleReset }, _('Reset')), ')'
		];

	cbi_update_table('#packages', currentDisplayRows.slice(offset, offset + 100),
		placeholder);
}

function handleMode(ev)
{
	const tab = findParent(ev.target, 'li');
	if (tab.getAttribute('data-mode') === currentDisplayMode)
		return;

	tab.parentNode.querySelectorAll('li').forEach(function(li) {
		li.classList.remove('cbi-tab');
		li.classList.add('cbi-tab-disabled');
	});

	tab.classList.remove('cbi-tab-disabled');
	tab.classList.add('cbi-tab');

	currentDisplayMode = tab.getAttribute('data-mode');

	display(document.querySelector('input[name="filter"]').value);

	ev.target.blur();
	ev.preventDefault();
}

function handleI18nFilter(ev)
{
	display(document.querySelector('input[name="filter"]').value);
}

function orderOf(c)
{
	if (c === '~')
		return -1;
	else if (c === '' || c >= '0' && c <= '9')
		return 0;
	else if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
		return c.charCodeAt(0);
	else
		return c.charCodeAt(0) + 256;
}

function compareVersion(val, ref) {
	// 1. Split into parts by dots or any non-digit sequences
	const vParts = (val || '').split(/[^0-9]+/);
	const rParts = (ref || '').split(/[^0-9]+/);

	// 2. Filter out empty strings caused by leading/trailing non-digits
	const v = vParts.filter(x => x.length > 0);
	const r = rParts.filter(x => x.length > 0);

	const maxLen = Math.max(v.length, r.length);

	for (let i = 0; i < maxLen; i++) {
		// Convert to integer (base 10) to automatically ignore leading zeros
		const vNum = parseInt(v[i] || 0, 10);
		const rNum = parseInt(r[i] || 0, 10);

		if (vNum > rNum) return 1;
		if (vNum < rNum) return -1;
	}

	return 0;
}

function versionSatisfied(ver, ref, vop)
{
	const r = compareVersion(ver, ref);

	switch (vop) {
	case '<':
	case '<=':
		return r <= 0;

	case '>':
	case '>=':
		return r >= 0;

	case '<<':
		return r < 0;

	case '>>':
		return r > 0;

	case '=':
		return r === 0;
	}

	return false;
}

function pkgStatus(pkg, vop, ver, info, count)
{
	info.errors = info.errors || [];
	info.install = info.install || [];

	if (isPkgInstalled(pkg)) {
		if (vop && !versionSatisfied(pkg.version, ver, vop)) {
			let repl = null;

			(packages.available.providers[pkg.name] || []).forEach(function(p) {
				if (!repl && versionSatisfied(p.version, ver, vop))
					repl = p;
			});

			if (repl) {
				info.install.push(repl);
				return E('span', {
					'class': 'label',
					'data-tooltip': _('Requires update to %h %h')
						.format(repl.name, repl.version)
				}, _('Needs upgrade'));
			}

			info.errors.push(_('The installed version of package <em>%h</em> is not compatible, require %s while %s is installed.').format(pkg.name, truncateVersion(ver, vop), truncateVersion(pkg.version)));

			return E('span', {
				'class': 'label warning',
				'data-tooltip': _('Require version %h %h,\ninstalled %h')
					.format(vop, ver, pkg.version)
			}, _('Version incompatible'));
		}

		return E('span', { 'class': 'label notice' }, _('Installed'));
	}
	else if (!pkg.missing) {
		if (!vop || versionSatisfied(pkg.version, ver, vop)) {
			if (count !== false)
				info.install.push(pkg);
			return E('span', { 'class': 'label' }, _('Not installed'));
		}

		info.errors.push(_('The repository version of package <em>%h</em> is not compatible, require %s but only %s is available.')
				.format(pkg.name, truncateVersion(ver, vop), truncateVersion(pkg.version)));

		return E('span', {
			'class': 'label warning',
			'data-tooltip': _('Require version %h %h,\ninstalled %h')
				.format(vop, ver, pkg.version)
		}, _('Version incompatible'));
	}
	else {
		info.errors.push(_('Required dependency package <em>%h</em> is not available in any repository.').format(pkg.name));

		return E('span', { 'class': 'label warning' }, _('Not available'));
	}
}

function renderDependencyItem(dep, info, flat)
{
	const li = E('li');
	const vop = dep.version ? dep.version[0] : null;
	const ver = dep.version ? dep.version[1] : null;
	const depends = [];

	// A dependency with several providers (alternatives) is satisfied by any
	// single one of them, so apk only ever installs one. Mirror the apk
	// solver's provider selection - an already installed one, otherwise the
	// available one with the highest provider-priority, otherwise the first
	// available one - and count only that towards the size estimate and
	// subdependencies instead of every alternative.
	let effective = -1;

	for (let i = 0; dep.pkgs && i < dep.pkgs.length; i++) {
		if (isPkgInstalled(packages.installed.pkgs[dep.pkgs[i]])) {
			effective = i;
			break;
		}
	}

	const satisfied = effective >= 0;

	if (!satisfied && dep.pkgs && dep.pkgs.length) {
		let prio = null;

		for (let i = 0; i < dep.pkgs.length; i++) {
			const p = packages.available.pkgs[dep.pkgs[i]];
			if (!p)
				continue;

			const pprio = Number(p['provider-priority']) || 0;
			if (prio === null || pprio > prio) {
				effective = i;
				prio = pprio;
			}
		}

		if (effective < 0)
			effective = 0;
	}

	for (let i = 0; dep.pkgs && i < dep.pkgs.length; i++) {
		const pkg = packages.installed.pkgs[dep.pkgs[i]] ||
		          packages.available.pkgs[dep.pkgs[i]] ||
		          { name: dep.name };

		if (i > 0)
			li.appendChild(document.createTextNode(' | '));

		let text = pkg.name;

		if (pkg.installsize)
			text += ' (%1024mB)'.format(pkg.installsize);
		else if (pkg.size)
			text += ' (~%1024mB)'.format(pkg.size);

		li.appendChild(E('span', { 'data-tooltip': pkg.description },
			[ text, ' ', pkgStatus(pkg, vop, ver, info, !satisfied && i === effective) ]));

		if (i === effective)
			(pkg.depends || []).forEach(function(d) {
				if (depends.indexOf(d) === -1)
					depends.push(d);
			});
	}

	if (!li.firstChild)
		li.appendChild(E('span', {},
			[ dep.name, ' ',
			  pkgStatus({ name: dep.name, missing: true }, vop, ver, info) ]));

	if (!flat) {
		const subdeps = renderDependencies(depends, info);
		if (subdeps)
			li.appendChild(subdeps);
	}

	return li;
}

function renderDependencies(depends, info, flat)
{
	const deps = depends || [];
	const items = [];

	info.seen = info.seen || [];

	for (let i = 0; i < deps.length; i++) {
		let dep, vop, ver;

		if (deps[i] === 'libc')
			continue;

		// This regex handles "name", "name>=ver", and "name (>=ver)"
		const match = deps[i].match(/^([^><=~\s]+)\s*\(?([><=~]+)?\s*([^)]+)?\)?$/);

		if (match) {
			// Destructure the match array: [full_match, name, operator, version]
			const [, matchedDep, matchedVop, matchedVer] = match;
			dep = (matchedDep || '').trim();
			vop = (matchedVop || '').trim() || null;
			ver = (matchedVer || '').trim() || null;
		} else {
			// Fallback if the string is just a plain name with no operators
			dep = deps[i].trim();
			vop = ver = null;
		}

		if (info.seen[dep])
			continue;

		const pkgs = [];

		(packages.installed.providers[dep] || []).forEach(function(p) {
			if (pkgs.indexOf(p.name) === -1) pkgs.push(p.name);
		});

		(packages.available.providers[dep] || []).forEach(function(p) {
			if (pkgs.indexOf(p.name) === -1) pkgs.push(p.name);
		});

		info.seen[dep] = {
			name:    dep,
			pkgs:    pkgs,
			version: [vop, ver]
		};

		items.push(renderDependencyItem(info.seen[dep], info, flat));
	}

	if (items.length)
		return E('ul', { 'class': 'deps' }, items);

	return null;
}

function truncateVersion(v, op)
{
	v = v.replace(/\b(([a-f0-9]{8})[a-f0-9]{24,32})\b/,
		'<span data-tooltip="$1">$2…</span>');

	if (!op || op === '=')
		return v;

	return '%h %h'.format(op, v);
}

function handleReset(ev)
{
	const filter = document.querySelector('input[name="filter"]');

	filter.value = '';
	display();
}

function handleInstall(ev)
{
	const name = ev.target.getAttribute('data-package');
	const installcmd = ev.target.getAttribute('data-action');
	const pkg = packages.available.pkgs[name];
	const depcache = {};
	let size;

	if (pkg.installsize)
		size = _('~%1024mB installed').format(pkg.installsize);
	else if (pkg.size)
		size = _('~%1024mB compressed').format(pkg.size);
	else
		size = _('unknown');

	const deps = renderDependencies(pkg.depends, depcache);
	let tree = null, errs = null, inst = null, desc = null;

	if (depcache.errors && depcache.errors.length) {
		errs = E('ul', { 'class': 'errors' });
		depcache.errors.forEach(function(err) {
			errs.appendChild(E('li', {}, err));
		});
	}

	let totalsize = pkg.installsize || pkg.size || 0;
	let totalpkgs = 1;
	let suggestsize = 0;

	if (depcache.install && depcache.install.length)
		depcache.install.forEach(function(ipkg) {
			totalsize += ipkg.installsize || ipkg.size || 0;
			totalpkgs++;
		});

	const luci_basename = pkg.name.match(/^luci-([^-]+)-(.+)$/);
	const i18n_packages = [];
	let i18n_tree;

	if (luci_basename && (luci_basename[1] !== 'i18n' || luci_basename[2].indexOf('base-') === 0)) {
		let i18n_filter;

		if (luci_basename[1] === 'i18n') {
			const basenames = [];

			for (let pkgname in packages.installed.pkgs) {
				const m = pkgname.match(/^luci-([^-]+)-(.+)$/);

				if (m && m[1] !== 'i18n')
					basenames.push(m[2]);
			}

			if (basenames.length)
				i18n_filter = new RegExp('^luci-i18n-(' + basenames.join('|') + ')-' + pkg.name.replace(/^luci-i18n-base-/, '') + '$');
		}
		else {
			i18n_filter = new RegExp('^luci-i18n-' + luci_basename[2] + '-(' + languages.join('|') + ')$');
		}

		if (i18n_filter) {
			for (let pkgname in packages.available.pkgs)
				if (pkgname !== pkg.name && pkgname.match(i18n_filter))
					i18n_packages.push(pkgname);

			const i18ncache = {};

			i18n_tree = renderDependencies(i18n_packages, i18ncache, true);

			if (i18ncache.install && i18ncache.install.length) {
				i18ncache.install.forEach(function(ipkg) {
					suggestsize += ipkg.installsize || ipkg.size || 0;
				});
			}
		}
	}

	inst = E('p', [
		_('Require approx. %1024mB size for %d package(s) to install.')
			.format(totalsize, totalpkgs),
		' ',
		suggestsize ? _('Suggested translations require approx. %1024mB additional space.').format(suggestsize) : ''
	]);

	if (deps) {
		tree = E('li', '<strong>%s:</strong>'.format(_('Dependencies')));
		tree.appendChild(deps);
	}

	if (pkg.description) {
		desc = E('div', {}, [
			E('h5', {}, _('Description')),
			E('p', {}, pkg.description)
		]);
	}

	ui.showModal(_('Details for package <em>%h</em>').format(pkg.name), [
		E('ul', {}, [
			E('li', '<strong>%s:</strong> %h'.format(_('Version'), pkg.version)),
			E('li', '<strong>%s:</strong> %h'.format(_('Size'), size)),
			tree || '',
			i18n_packages.length ? E('li', [
				E('strong', [_('Suggested translations'), ':']),
				i18n_tree
			]) : ''
		]),
		desc || '',
		errs || inst || '',
		E('div', [
			E('hr'),
			i18n_packages.length ? E('p', [
				E('label', { 'class': 'cbi-checkbox' }, [
					E('input', {
						'id': 'i18ninstall-cb',
						'type': 'checkbox',
						'name': 'i18ninstall',
						'data-packages': i18n_packages.join(' '),
						'disabled': isReadonlyView,
						'checked': true
					}), ' ',
					E('label', { 'for': 'i18ninstall-cb' }), ' ',
					_('Install suggested translation packages as well')
				])
			]) : '',
			E('p', [
				E('label', { 'class': 'cbi-checkbox' }, [
					E('input', {
						'id': 'overwrite-cb',
						'type': 'checkbox',
						'name': 'overwrite',
						'disabled': isReadonlyView
					}), ' ',
					E('label', { 'for': 'overwrite-cb' }), ' ',
					_('Allow overwriting conflicting package files')
				])
			])
		]),
		E('div', { 'class': 'right' }, [
			E('div', {
				'class': 'btn',
				'click': ui.hideModal
			}, _('Cancel')),
			' ',
			E('div', {
				'data-command': installcmd,
				'data-package': name,
				'class': 'btn cbi-button-action',
				'click': handlePkg,
				'disabled': isReadonlyView
			}, _('Install'))
		])
	]);
}

function handleManualInstall(ev)
{
	const name_or_url = document.querySelector('input[name="install"]').value;
	let install = E('div', {
			'class': 'btn cbi-button-action',
			'data-command': 'install',
			'data-package': name_or_url,
			'click': function(ev) {
				document.querySelector('input[name="install"]').value = '';
				handlePkg(ev);
			}
		}, _('Install'));
	let warning;

	if (!name_or_url.length) {
		return;
	}
	else if (name_or_url.indexOf('/') !== -1) {
		warning = E('p', {}, _('Installing packages from untrusted sources is a potential security risk! Really attempt to install <em>%h</em>?').format(name_or_url));
	}
	else if (!packages.available.providers[name_or_url]) {
		warning = E('p', {}, _('The package <em>%h</em> is not available in any configured repository.').format(name_or_url));
		install = '';
	}
	else {
		warning = E('p', {}, _('Really attempt to install <em>%h</em>?').format(name_or_url));
	}

	ui.showModal(_('Manually install package'), [
		warning,
		E('div', { 'class': 'right' }, [
			E('div', {
				'click': ui.hideModal,
				'class': 'btn cbi-button-neutral'
			}, _('Cancel')),
			' ', install
		])
	]);
}

function handleConfig(ev)
{
	const conf = {};
	const base_dir = L.hasSystemFeature('apk') ? '/etc/apk' : '/etc/opkg';

	ui.showModal(_('%s Configuration').format(L.hasSystemFeature('apk') ? 'APK' : 'OPKG'), [
		E('p', { 'class': 'spinning' }, _('Loading configuration data…'))
	]);

	fs.list(base_dir).then(function(partials) {
		const files = [];

		if (L.hasSystemFeature('apk')) {
                        files.push(base_dir + '/' + 'repositories.d/customfeeds.list',
                                   base_dir + '/' + 'repositories.d/distfeeds.list'
                        )
                } else {
                        files.push(base_dir + '.conf')
                }

		for (let i = 0; i < partials.length; i++) {
			if (partials[i].type === 'file') {
				if (L.hasSystemFeature('apk')) {
					if (partials[i].name === 'repositories')
						files.push(base_dir + '/' + partials[i].name);
				} else if (partials[i].name.match(/\.conf$/)) {
					files.push(base_dir + '/' + partials[i].name);
				}
			}
		}

		return Promise.all(files.map(function(file) {
			return fs.read(file)
				.then(L.bind(function(conf, file, res) { conf[file] = res }, this, conf, file))
				.catch(function(err) {
					ui.addNotification(null, E('p', {}, [ _('Unable to read %s: %s').format(file, err) ]));
					ui.hideModal();
					throw err;
				});
		}));
	}).then(function() {
		const opkg_text = _('Below is a listing of the various configuration files used by <em>opkg</em>. Use <em>opkg.conf</em> for global settings and <em>customfeeds.conf</em> for custom repository entries. The configuration in the other files may be changed but is usually not preserved by <em>sysupgrade</em>.')
		const apk_text = _('Below is a listing of the various configuration files used by <em>apk</em>. The configuration in the other files may be changed but is usually not preserved by <em>sysupgrade</em>.')
		const body = [
			E('p', {}, L.hasSystemFeature('apk') ? apk_text : opkg_text)
		];

		Object.keys(conf).sort().forEach(function(file) {
			body.push(E('h5', {}, '%h'.format(file)));
			body.push(E('textarea', {
				'name': file,
				'rows': Math.max(Math.min(L.toArray(conf[file].match(/\n/g)).length, 10), 3) + 1
			}, '%h'.format(conf[file])));
		});

		body.push(E('div', { 'class': 'button-row' }, [
			E('div', {
				'class': 'btn cbi-button-neutral',
				'click': ui.hideModal
			}, _('Cancel')),
			' ',
			E('div', {
				'class': 'btn cbi-button-positive',
				'click': function(ev) {
					const data = {};
					findParent(ev.target, '.modal').querySelectorAll('textarea[name]')
						.forEach(function(textarea) {
							data[textarea.getAttribute('name')] = textarea.value
						});

					ui.showModal(_('%s Configuration').format(L.hasSystemFeature('apk') ? 'APK' : 'OPKG'), [
						E('p', { 'class': 'spinning' }, _('Saving configuration data…'))
					]);

					Promise.all(Object.keys(data).map(function(file) {
						return fs.write(file, data[file]).catch(function(err) {
							ui.addNotification(null, E('p', {}, [ _('Unable to save %s: %s').format(file, err) ]));
						});
					})).then(ui.hideModal);
				},
				'disabled': isReadonlyView
			}, _('Save')),
		]));

		ui.showModal(_('%s Configuration').format(L.hasSystemFeature('apk') ? 'APK' : 'OPKG'), body);
	});
}

function handleRemove(ev)
{
	const name = ev.target.getAttribute('data-package');
	const pkg = packages.installed.pkgs[name];
	const avail = packages.available.pkgs[name] || {};
	let size, desc;

	if (avail.installsize)
		size = _('~%1024mB installed').format(avail.installsize);
	else if (avail.size)
		size = _('~%1024mB compressed').format(avail.size);
	else
		size = _('unknown');

	if (avail.description) {
		desc = E('div', {}, [
			E('h5', {}, _('Description')),
			E('p', {}, avail.description)
		]);
	}

	ui.showModal(_('Remove package <em>%h</em>').format(pkg.name), [
		E('ul', {}, [
			E('li', '<strong>%s:</strong> %h'.format(_('Version'), pkg.version)),
			E('li', '<strong>%s:</strong> %h'.format(_('Size'), size))
		]),
		desc || '',
		E('div', { 'style': 'display:flex; justify-content:space-between; flex-wrap:wrap' }, [
			E('label', { 'class': 'cbi-checkbox', 'style': 'float:left' }, [
				E('input', { 'id': 'autoremove-cb', 'type': 'checkbox', 'checked': 'checked', 'name': 'autoremove', 'disabled': isReadonlyView || L.hasSystemFeature('apk') || null }), ' ',
				E('label', { 'for': 'autoremove-cb' }), ' ',
				_('Automatically remove unused dependencies')
			]),
			E('div', { 'style': 'flex-grow:1', 'class': 'right' }, [
				E('div', {
					'class': 'btn',
					'click': ui.hideModal
				}, _('Cancel')),
				' ',
				E('div', {
					'data-command': 'remove',
					'data-package': name,
					'class': 'btn cbi-button-negative',
					'click': handlePkg,
					'disabled': isReadonlyView
				}, _('Remove'))
			])
		])
	]);
}

function handlePkg(ev)
{
	return new Promise(function(resolveFn, rejectFn) {
		const cmd = ev.target.getAttribute('data-command');
		const pkg = ev.target.getAttribute('data-package');
		const rem = document.querySelector('input[name="autoremove"]');
		const owr = document.querySelector('input[name="overwrite"]');
		const i18n = document.querySelector('input[name="i18ninstall"]');

		const dlg = ui.showModal(_('Executing package manager'), [
			E('p', { 'class': 'spinning' },
				_('Waiting for the <em>%s %h</em> command to complete…').format(L.hasSystemFeature('apk') ? 'apk' : 'opkg', cmd))
		]);

		const argv = [ cmd ];

		if (cmd === 'remove')
			argv.push('--force-removal-of-dependent-packages')

		if (rem && rem.checked)
			argv.push('--autoremove');

		if (owr && owr.checked)
			argv.push('--force-overwrite');

		if (i18n && i18n.checked)
			argv.push.apply(argv, i18n.getAttribute('data-packages').split(' '));

		if (pkg != null)
			argv.push(pkg);

		fs.exec_direct('/usr/libexec/package-manager-call', argv, 'json').then(function(res) {
			dlg.removeChild(dlg.lastChild);

			if (res.pkmcmd)
				dlg.appendChild(E('pre', [ res.pkmcmd ]));

			if (res.stdout)
				dlg.appendChild(E('pre', [ res.stdout ]));

			if (res.stderr) {
				dlg.appendChild(E('h5', _('Errors')));
				dlg.appendChild(E('pre', { 'class': 'errors' }, [ res.stderr ]));
			}

			if (res.code !== 0)
				dlg.appendChild(E('p', _('The <em>%s %h</em> command failed with code <code>%d</code>.').format(L.hasSystemFeature('apk') ? 'apk' : 'opkg', cmd, (res.code & 0xff) || -1)));

			dlg.appendChild(E('div', { 'class': 'button-row' },
				E('div', {
					'class': 'btn',
					'click': L.bind(function(res) {
						if (ui.menu && ui.menu.flushCache)
							ui.menu.flushCache();

						ui.hideModal();
						updateLists();

						if (res.code !== 0)
							rejectFn(new Error(res.stderr || '%s error %d'.format(L.hasSystemFeature('apk') ? 'apk' : 'opkg', res.code)));
						else
							resolveFn(res);
					}, this, res)
				}, _('Dismiss'))));
		}).catch(function(err) {
			ui.addNotification(null, E('p', _('Unable to execute <em>%s %s</em> command: %s').format(L.hasSystemFeature('apk') ? 'apk' : 'opkg', cmd, err)));
			ui.hideModal();
		});
	});
}

function handleUpload(ev)
{
	const path = '/tmp/upload.%s'.format(L.hasSystemFeature('apk') ? 'apk' : 'ipk');
	return ui.uploadFile(path).then(L.bind(function(btn, res) {
		ui.showModal(_('Manually install package'), [
			E('p', {}, _('Installing packages from untrusted sources is a potential security risk! Really attempt to install <em>%h</em>?').format(res.name)),
			E('ul', {}, [
				res.size ? E('li', {}, '%s: %1024.2mB'.format(_('Size'), res.size)) : '',
				res.checksum ? E('li', {}, '%s: %s'.format(_('MD5'), res.checksum)) : '',
				res.sha256sum ? E('li', {}, '%s: %s'.format(_('SHA256'), res.sha256sum)) : ''
			]),
			E('div', { 'class': 'right' }, [
				E('div', {
					'click': function(ev) {
						ui.hideModal();
						fs.remove(path);
					},
					'class': 'btn cbi-button-neutral'
				}, _('Cancel')), ' ',
				E('div', {
					'class': 'btn cbi-button-action',
					'data-command': 'install',
					'data-package': path,
					'click': function(ev) {
						handlePkg(ev).finally(function() {
							fs.remove(path)
						});
					}
				}, _('Install'))
			])
		]);
	}, this, ev.target));
}

function downloadLists()
{
	return Promise.all([
		callMountPoints(),
		fs.exec_direct('/usr/libexec/package-manager-call', [ 'list-available' ]),
		fs.exec_direct('/usr/libexec/package-manager-call', [ 'list-installed' ])
	]);
}

function updateLists(data)
{
	cbi_update_table('#packages', [],
		E('div', { 'class': 'spinning' }, _('Loading package information…')));

	packages.available = { providers: {}, pkgs: {} };
	packages.installed = { providers: {}, pkgs: {} };

	return (data ? Promise.resolve(data) : downloadLists()).then(function(data) {
		const pg = document.querySelector('.cbi-progressbar');
		const mount = L.toArray(data[0].filter(function(m) { return m.mount === '/' || m.mount === '/overlay' }))
				.sort(function(a, b) { return a.mount > b.mount })[0] || { size: 0, free: 0 };

		pg.firstElementChild.style.width = Math.floor(mount.size ? (100 / mount.size) * (mount.size - mount.free) : 100) + '%';
		pg.setAttribute('title', _('%s used (%1024mB used of %1024mB, %1024mB free)').format(pg.firstElementChild.style.width, mount.size - mount.free, mount.size, mount.free));

		parsePackageData(data[1], packages.available);
		parsePackageData(data[2], packages.installed);

		for (let pkgname in packages.installed.pkgs)
			if (pkgname.indexOf('luci-i18n-base-') === 0)
				languages.push(pkgname.substring(15));

		display(document.querySelector('input[name="filter"]').value);
	});
}

let inputTimeout = null;

function handleInput(ev) {
	if (inputTimeout !== null)
		window.clearTimeout(inputTimeout);

	inputTimeout = window.setTimeout(function() {
		display(ev.target.value);
	}, 250);
}

return view.extend({
	load() {
		return downloadLists();
	},

	render(listData) {
		const query = decodeURIComponent(L.toArray(location.search.match(/\bquery=([^=]+)\b/))[1] || '');

		const view = E([], [
			E('style', { 'type': 'text/css' }, [ css ]),

			E('h2', {}, _('Software')),

			E('div', { 'class': 'cbi-map-descr' }, [
				E('span', _('Install additional software and upgrade existing packages with %s.').format(L.hasSystemFeature('apk') ? 'apk' : 'opkg')),
				E('br'),
				E('span', _('<strong>Warning!</strong> Package operations can <a %s>break your system</a>.').format(
					'href="https://openwrt.org/meta/infobox/upgrade_packages_warning" target="_blank" rel="noreferrer"'
				))
			]),

			E('div', { 'class': 'cbi-section' }, E('div', { 'class': 'controls' }, [
				E('div', {}, [
					E('label', {'id': 'disk-space-label'}, _('Disk space') + ':'),
					E('div', { 'class': 'cbi-progressbar', 'title': _('unknown') }, E('div', {}, [ '\u00a0' ]))
				]),

				E('div', {}, [
					E('label', {'id': 'filter-label'}, _('Filter') + ':'),
					E('span', { 'class': 'control-group' }, [
						E('input', { 'type': 'text', 'name': 'filter', 'placeholder': _('Type to filter…'), 'value': query, 'input': handleInput }),
						E('button', { 'class': 'btn cbi-button', 'click': handleReset }, [ _('Clear') ])
					])
				]),

				E('div', {}, [
					E('label', {'id': 'download-label'}, _('Download and install package') + ':'),
					E('span', { 'class': 'control-group' }, [
						E('input', { 'type': 'text', 'name': 'install', 'placeholder': _('Package name or URL…'), 'keydown': function(ev) { if (ev.keyCode === 13) handleManualInstall(ev) }, 'disabled': isReadonlyView }),
						E('button', { 'class': 'btn cbi-button cbi-button-action', 'click': handleManualInstall, 'disabled': isReadonlyView }, [ _('OK') ])
					])
				]),

				E('div', {}, [
					E('label', {'id': 'action-label'}, _('Actions') + ':'), ' ',
					E('span', { 'class': 'control-group' }, [
						E('button', { 'class': 'btn cbi-button-positive', 'data-command': 'update', 'click': handlePkg, 'disabled': isReadonlyView }, [ _('Update lists…') ]), ' ',
						E('button', { 'class': 'btn cbi-button-action', 'click': handleUpload, 'disabled': isReadonlyView }, [ _('Upload Package…') ]), ' ',
						E('button', { 'class': 'btn cbi-button-neutral', 'click': handleConfig }, [ _('Configure %s').format(L.hasSystemFeature('apk') ? 'apk' : 'opkg') ])
					])
				]),

				E('div', {}, [
					E('label', {}, _('Display LuCI translation packages') + ':'), ' ',
					E('div', [
						E('label', {
							'data-tooltip': _('Display base translation packages and translation packages for already installed languages only')
						}, [
							E('input', {
								'type': 'radio',
								'name': 'filter_i18n',
								'value': 'lang',
								'change': handleI18nFilter,
								'checked': true
							}),
							' ',
							_('filtered', 'Display translation packages')
						]),
						' \u00a0 ',
						E('label', {
							'data-tooltip': _('Display all available translation packages')
						}, [
							E('input', {
								'type': 'radio',
								'name': 'filter_i18n',
								'value': 'all',
								'change': handleI18nFilter
							}),
							' ',
							_('all', 'Display translation packages')
						]),
						' \u00a0 ',
						E('label', {
							'data-tooltip': _('Hide all translation packages')
						}, [
							E('input', {
								'type': 'radio',
								'name': 'filter_i18n',
								'value': 'none',
								'change': handleI18nFilter
							}),
							' ',
							_('none', 'Display translation packages')
						])
					])
				])
			])),

			E('ul', { 'class': 'cbi-tabmenu mode' }, [
				E('li', { 'data-mode': 'available', 'class': 'available cbi-tab', 'click': handleMode }, E('a', { 'href': '#' }, [ _('Available') ])),
				E('li', { 'data-mode': 'installed', 'class': 'installed cbi-tab-disabled', 'click': handleMode }, E('a', { 'href': '#' }, [ _('Installed') ])),
				E('li', { 'data-mode': 'updates', 'class': 'installed cbi-tab-disabled', 'click': handleMode }, E('a', { 'href': '#' }, [ _('Updates') ]))
			]),

			E('div', { 'class': 'cbi-section' }, [
			E('div', { 'class': 'controls', 'style': 'display:none' }, [
				E('div', { 'class': 'pager center' }, [
					E('button', { 'class': 'btn cbi-button-neutral prev', 'aria-label': _('Previous page'), 'click': handlePage }, [ '«' ]),
					E('div', { 'class': 'text' }, [ 'dummy' ]),
					E('button', { 'class': 'btn cbi-button-neutral next', 'aria-label': _('Next page'), 'click': handlePage }, [ '»' ])
				])
			]),

			E('table', { 'id': 'packages', 'class': 'table' }, [
				E('tr', { 'class': 'tr cbi-section-table-titles' }, [
					E('th', { 'class': 'th col-2 left' }, [ _('Package name') ]),
					E('th', { 'class': 'th col-2 left version' }, [ _('Version') ]),
					E('th', { 'class': 'th col-1 center size'}, [ _('Size (%s)').format(L.hasSystemFeature('apk') ? '.apk' : '.ipk') ]),
					E('th', { 'class': 'th col-10 left' }, [ _('Description') ]),
					E('th', { 'class': 'th right cbi-section-actions' }, [ '\u00a0' ])
				])
			]),

			E('div', { 'class': 'controls', 'style': 'display:none' }, [
				E('div', { 'class': 'pager center' }, [
					E('button', { 'class': 'btn cbi-button-neutral prev', 'aria-label': _('Previous page'), 'click': handlePage }, [ '«' ]),
					E('div', { 'class': 'text' }, [ 'dummy' ]),
					E('button', { 'class': 'btn cbi-button-neutral next', 'aria-label': _('Next page'), 'click': handlePage }, [ '»' ])
				])
			])
			])
		]);

		requestAnimationFrame(function() {
			updateLists(listData)
		});

		return view;
	},

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