<?php

class Page_BaseConfig extends Page
{
	private $qry_extra = array();

	/**
	 * @var bool|string in case we're in module mode, set to the id of the module
	 */
	private $targetModule = false;

	protected function doPreprocess()
	{
		User::load();

		// Determine if we're setting global or module specific
		$this->getModuleSpecific();

		$newValues = Request::post('setting');
		if (is_array($newValues)) {
			if (!User::hasPermission('superadmin')) {
				Message::addError('main.no-permission');
				Util::redirect('?do=baseconfig');
			}
			// Build variables for specific sub-settings
			if (empty($this->qry_extra['field'])) {
				$qry_insert = '';
				$qry_values = '';
				$params = array();
			} else {
				$qry_insert = ', ' . $this->qry_extra['field'];
				$qry_values = ', :field_value';
				$params = array('field_value' => $this->qry_extra['field_value']);
				$delExtra = " AND {$this->qry_extra['field']} = :field_value ";
				$delParams = array('field_value' => $this->qry_extra['field_value']);
			}
			if ($this->targetModule === false) {
				$override = false;
			} else {
				// Not editing global settings
				if ($this->getCurrentModuleName() === false) {
					Message::addError('main.value-invalid', $this->qry_extra['field'], $this->qry_extra['field_value']);
					Util::redirect('?do=BaseConfig');
				}
				// Honor override checkbox
				$override = Request::post('override', array());
			}
			// Load all existing config options to validate input
			$vars = BaseConfigUtil::getVariables();
			foreach ($vars as $key => $var) {
				if (is_array($override) && (!isset($override[$key]) || $override[$key] !== 'on')) {
					// module mode - override not set - delete
					$delParams['key'] = $key;
					Database::exec("DELETE FROM {$this->qry_extra['table']} WHERE setting = :key $delExtra", $delParams);
					continue;
				}
				$validator = $var['validator'];
				$displayValue = (isset($newValues[$key]) ? $newValues[$key] : '');
				// Validate data first!
				$mangledValue = Validator::validate($validator, $displayValue);
				if ($mangledValue === false) {
					Message::addWarning('main.value-invalid', $key, $displayValue);
					continue;
				}
				// Now put into DB
				Database::exec("INSERT INTO {$this->qry_extra['table']} (setting, value, displayvalue $qry_insert)"
					. " VALUES (:key, :value, :displayvalue $qry_values)"
					. " ON DUPLICATE KEY UPDATE value = :value, displayvalue = :displayvalue",
					array(
						'key'      => $key,
						'value'    => $mangledValue,
						'displayvalue' => $displayValue
					) + $params
				);
			}
			Message::addSuccess('settings-updated');
			if ($this->targetModule === false) {
				Util::redirect('?do=BaseConfig');
			} elseif (empty($this->qry_extra['field'])) {
				Util::redirect('?do=BaseConfig&module=' . $this->targetModule);
			} else {
				Util::redirect('?do=BaseConfig&module=' . $this->targetModule . '&' . $this->qry_extra['field'] . '=' . $this->qry_extra['field_value']);
			}
		}
	}

	protected function doRender()
	{
		if (!User::hasPermission('superadmin')) {
			Message::addError('main.no-permission');
			Util::redirect('?do=Main');
		}
		// Check if valid submodule mode, store name if any
		if ($this->targetModule !== false) {
			$this->qry_extra['subheading'] = $this->getCurrentModuleName();
			if ($this->qry_extra['subheading'] === false) {
				Message::addError('main.value-invalid', $this->qry_extra['field'], $this->qry_extra['field_value']);
				Util::redirect('?do=BaseConfig');
			}
		}
		// List config options
		$settings = array();
		$vars = BaseConfigUtil::getVariables();
		$cats = BaseConfigUtil::getCategories();
		// Get stuff that's set in DB already
		if (isset($this->qry_extra['field'])) {
			$where = " WHERE {$this->qry_extra['field']} = :field_value";
			$params = array('field_value' => $this->qry_extra['field_value']);
		} else {
			$where = '';
			$params = array();
		}
		// Populate structure with existing config from db
		$res = Database::simpleQuery("SELECT setting, value, displayvalue FROM {$this->qry_extra['table']} "
			. " {$where} ORDER BY setting ASC", $params);
		while ($row = $res->fetch(PDO::FETCH_ASSOC)) {
			if (!isset($vars[$row['setting']]) || !is_array($vars[$row['setting']])) {
				$unknown[] = $row['setting'];
				continue;
			}
			$row += $vars[$row['setting']];
			if (is_null($row['displayvalue'])) {
				$row['displayvalue'] = $row['defaultvalue'];
			}
			if (!isset($row['catid'])) {
				$row['catid'] = 'unknown';
			}
			$settings[$row['catid']]['settings'][$row['setting']] = $row;
		}
		// Add entries that weren't in the db (global), setup override checkbox (module specific)
		foreach ($vars as $key => $var) {
			if (isset($settings[$var['catid']]['settings'][$key])) {
				// Value is set in DB
				$settings[$var['catid']]['settings'][$key]['checked'] = 'checked';
			} else {
				// Value is not set in DB
				$settings[$var['catid']]['settings'][$key] = $var + array(
					'setting' => $key
				);
			}
			$settings[$var['catid']]['settings'][$key] += array(
				'item' => $this->makeInput($var['validator'], $key, $var['defaultvalue']),
				'description' => Util::markup(Dictionary::translateFileModule($var['module'], 'config-variables', $key))
			);
		}
		// Sort categories
		$sortvals = array();
		foreach ($settings as $catid => &$setting) {
			$sortvals[] = isset($cats[$catid]) ? (int)$cats[$catid]['sortpos'] : 99999;
			$setting['category_id'] = $catid;
			$setting['category_name'] = Dictionary::translateFileModule($cats[$catid]['module'], 'config-variable-categories', $catid);
			if ($setting['category_name'] === false) {
				$setting['category_name'] = $catid;
			}
			$setting['settings'] = array_values($setting['settings']);
		}
		unset($setting);
		array_multisort($sortvals, SORT_ASC, SORT_NUMERIC, $settings);
		Render::addTemplate('_page', array(
			'userid' => User::getId(),
			'override' => $this->targetModule !== false,
			'categories'  => array_values($settings),
			'target_module' => $this->targetModule,
		) + $this->qry_extra);
	}

	private function getCurrentModuleName()
	{
		if (isset($this->qry_extra['tostring'])) {
			$method = explode('::', $this->qry_extra['tostring']);
			return call_user_func($method, $this->qry_extra['field_value']);
		}
		if (isset($this->qry_extra['field'])) {
			return $this->targetModule . ' // ' . $this->qry_extra['field'] . '=' . $this->qry_extra['field_value'];
		}
		return $this->targetModule;
	}

	private function getModuleSpecific()
	{
		$module = Request::any('module', '', 'string');
		if ($module === '') {
			$this->qry_extra = array(
				'table' => 'setting_global',
			);
			return;
		}
		//\\//\\//\\
		if (!Module::isAvailable($module)) {
			Message::addError('main.no-such-module', $module);
			Util::redirect('?do=baseconfig');
		}
		$file = 'modules/' . $module . '/baseconfig/hook.json';
		if (!file_exists($file)) {
			Message::addError('no-module-hook', $module);
			Util::redirect('?do=baseconfig');
		}
		$hook = json_decode(file_get_contents($file), true);
		if (empty($hook['table'])) {
			Message::addError('invalid-hook', $module);
			Util::redirect('?do=baseconfig');
		}
		if (isset($hook['field'])) {
			$hook['field_value'] = Request::any($hook['field'], '0', 'string');
		}
		$this->targetModule = $module;
		$this->qry_extra = $hook;
	}
	
	/**
	 * Create html snippet for setting, based on given validator
	 * @param type $validator
	 * @return boolean
	 */
	private function makeInput($validator, $setting, $current)
	{
		$parts = explode(':', $validator, 2);
		if ($parts[0] === 'list') {
			$items = explode('|', $parts[1]);
			$ret = '<select name="setting[' . $setting . ']" class="form-control">';
			foreach ($items as $item) {
				if ($item === $current) {
					$ret .= '<option selected="selected">' . $item . '</option>';
				} else {
					$ret .= '<option>' . $item . '</option>';
				}
			}
			return $ret . '</select>';
		}
		// Password field guessing
		if (stripos($validator, 'password') !== false) {
			$type = Property::getPasswordFieldType();
		} else {
			$type = 'text';
		}
		// Fallback: single line input
		return '<input type="' . $type . '" name="setting[' . $setting . ']" class="form-control" size="30" value="' . $current . '">';
	}

}