<?php

class SubPage
{

	public static function doPreprocess()
	{
		User::assertPermission('hints');
	}

	public static function doRender()
	{
		$locs = User::getAllowedLocations('hints');
		if (in_array(0, $locs)) {
			$locs = [];
		}
		self::showMemoryUpgrade($locs);
		self::showMemorySlow($locs);
		self::showUnusedSpace($locs);
	}

	/**
	 * Machines that have less than 8GB of RAM. Highlight those
	 * that still have free memory slots.
	 */
	private static function showMemoryUpgrade(array $locs)
	{
		$q = new HardwareQuery(HardwareInfo::MAINBOARD);
		if (!empty($locs)) {
			$q->addMachineWhere('locationid', 'IN', $locs);
		}
		$q->addLocalColumn('Memory Slot Occupied');
		$q->addGlobalColumn('Memory Slot Count');
		$q->addGlobalColumn('Memory Maximum Capacity');
		$q->addMachineColumn('clientip');
		$q->addMachineColumn('hostname');
		$col = $q->addLocalColumn('Memory Installed Capacity');
		$col->addCondition('<', 8 * 1024 * 1024 * 1024);
		$list = [];
		foreach ($q->query() as $row) {
			if (HardwareParser::convertSize($row['Memory Installed Capacity'], 'M', false)
					>= HardwareParser::convertSize($row['Memory Maximum Capacity'], 'M', false)) {
				$row['size_class'] = 'danger';
				$list[] = $row;
			} elseif ($row['Memory Slot Occupied'] < $row['Memory Slot Count']) {
				$row['count_class'] = 'success';
				array_unshift($list, $row);
			} else {
				$list[] = $row;
			}
		}
		Render::addTemplate('hints-ram-upgrade', ['list' => $list]);
	}

	/**
	 * Show machines where RAM modules are running slower
	 * than their design speed.
	 */
	private static function showMemorySlow(array $locs)
	{
		$q = new HardwareQuery(HardwareInfo::RAM_MODULE);
		if (!empty($locs)) {
			$q->addMachineWhere('locationid', 'IN', $locs);
		}
		$q->addLocalColumn('Locator');
		$q->addLocalColumn('Bank Locator');
		$q->addGlobalColumn('Form Factor');
		$q->addGlobalColumn('Type');
		$q->addGlobalColumn('Size');
		$q->addGlobalColumn('Manufacturer');
		$q->addLocalColumn('Serial Number');
		$q->addMachineColumn('clientip');
		$q->addMachineColumn('hostname');
		$col = $q->addGlobalColumn('Speed');
		$col->addCondition('>', $q->addLocalColumn('Configured Memory Speed'));
		$list = $q->query()->fetchAll();
		Render::addTemplate('hints-ram-underclocked', ['list' => $list]);
	}

	/**
	 * Show machines that have unpartitioned space available,
	 * and no ID44 or ID45.
	 */
	private static function showUnusedSpace(array $locs)
	{
		$id44 = $id45 = [];
		// ID44
		$q = new HardwareQuery(HardwareInfo::HDD);
		if (!empty($locs)) {
			$q->addMachineWhere('locationid', 'IN', $locs);
		}
		$q->addMachineColumn('clientip');
		$q->addMachineColumn('hostname');
		$q->addLocalColumn('unused')->addCondition('>', 2000000000); // 2 GB
		$q->addMachineWhere('id44mb', '<', 20000); // 20 GB
		foreach ($q->query()->fetchAll() as $row) {
			$row['unused_s'] = Util::readableFileSize($row['unused']);
			$row['id44mb_s'] = Util::readableFileSize($row['id44mb'], -1, 2);
			$id44[] = $row;
		}
		// ID45
		$q = new HardwareQuery(HardwareInfo::HDD);
		if (!empty($locs)) {
			$q->addMachineWhere('locationid', 'IN', $locs);
		}
		$q->addMachineColumn('clientip');
		$q->addMachineColumn('hostname');
		$q->addLocalColumn('unused')->addCondition('>', 50000000000); // 50 GB
		$q->addMachineWhere('id44mb', '>', 20000); // 20 GB
		$q->addMachineWhere('id45mb', '<', 20000); // 20 GB
		// Only suggest SSD based systems, caching on spinning rust is usually slower than GBit
		$q->addGlobalColumn('rotation_rate')->addCondition('=', 0);
		foreach ($q->query()->fetchAll() as $row) {
			$row['unused_s'] = Util::readableFileSize($row['unused']);
			$row['id44mb_s'] = Util::readableFileSize($row['id44mb'], -1, 2);
			$row['id45mb_s'] = Util::readableFileSize($row['id45mb'], -1, 2);
			$id45[] = $row;
		}
		Render::addTemplate('hints-hdd-grow', [
			'id44' => $id44,
			'id45' => $id45,
		]);
	}

}