<?php namespace CodeIgniter\Debug\Toolbar\Collectors;

/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2016, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package      CodeIgniter
 * @author       CodeIgniter Dev Team
 * @copyright    Copyright (c) 2014 - 2016, British Columbia Institute of Technology (http://bcit.ca/)
 * @license      http://opensource.org/licenses/MIT	MIT License
 * @link         http://codeigniter.com
 * @since        Version 4.0.0
 * @filesource
 */

use CodeIgniter\Database\Query;
use CodeIgniter\Services;

/**
 * Collector for the Database tab of the Debug Toolbar.
 */
class Database extends BaseCollector
{
	/**
	 * Whether this collector has timeline data.
	 *
	 * @var boolean
	 */
	protected $hasTimeline = true;

	/**
	 * Whether this collector should display its own tab.
	 *
	 * @var boolean
	 */
	protected $hasTabContent = true;

	/**
	 * Whether this collector has data for the Vars tab.
	 *
	 * @var boolean
	 */
	protected $hasVarData = false;

	/**
	 * The name used to reference this collector in the toolbar.
	 *
	 * @var string
	 */
	protected $title = 'Database';

	/**
	 * Array of database connections.
	 *
	 * @var array
	 */
	protected $connections;

    /**
     * The query instances that have been collected
     * through the DBQuery Hook.
     *
     * @var array
     */
    protected static $queries = [];


	//--------------------------------------------------------------------

	/**
	 * Constructor
	 */
	public function __construct()
	{
		$this->connections = \Config\Database::getConnections();
	}

	//--------------------------------------------------------------------

    /**
     * The static method used during Hooks to collect
     * data.
     *
     * @param \CodeIgniter\Database\Query $query
     *
     * @internal param $ array \CodeIgniter\Database\Query
     */
    public static function collect(Query $query)
    {
        static::$queries[] = $query;
    }

    //--------------------------------------------------------------------

	/**
	 * Returns timeline data formatted for the toolbar.
	 *
	 * @return array The formatted data or an empty array.
	 */
	protected function formatTimelineData(): array
	{
		$data = [];

		foreach ($this->connections as $alias => $connection)
		{
			// Connection Time
			$data[] = [
				'name' => 'Connecting to Database: "'.$alias.'"',
				'component' => 'Database',
				'start' => $connection->getConnectStart(),
				'duration' => $connection->getConnectDuration()
			];
		}

        foreach (static::$queries as $query)
        {
            $data[] = [
                'name' => 'Query',
                'component' => 'Database',
                'start' => $query->getStartTime(true),
                'duration' => $query->getDuration()
            ];
        }

		return $data;
	}

	//--------------------------------------------------------------------

	/**
	 * Returns the HTML to fill the Database tab in the toolbar.
	 *
	 * @return string The data formatted for the toolbar.
	 */
	public function display(): string
	{
        // Key words we want bolded
        $highlight = ['SELECT', 'DISTINCT', 'FROM', 'WHERE', 'AND', 'LEFT&nbsp;JOIN', 'ORDER&nbsp;BY', 'GROUP&nbsp;BY',
            'LIMIT', 'INSERT', 'INTO', 'VALUES', 'UPDATE', 'OR&nbsp;', 'HAVING', 'OFFSET', 'NOT&nbsp;IN',
            'IN', 'LIKE', 'NOT&nbsp;LIKE', 'COUNT', 'MAX', 'MIN', 'ON', 'AS', 'AVG', 'SUM', '(', ')'
        ];

		$output = '<table>';

        $output .= '<thead><tr>';
        $output .= '<th style="width: 6rem;">Time</th>';
        $output .= '<th>Query String</th>';
        $output .= '</tr></thead>';

        $output .= '<body>';

        foreach (static::$queries as $query)
        {
            $output .= '<tr>';
            $output .='<td class="narrow">'.($query->getDuration(5) * 1000).' ms</td>';

            $sql = $query->getQuery();

            foreach ($highlight as $term)
            {
                $sql = str_replace($term, "<strong>{$term}</strong>", $sql);
            }

            $output .= '<td>'.$sql.'</td>';
            $output .= '</tr>';
        }

        $output .= '</body>';

        $output .= '</table>';

		return $output;
	}

	//--------------------------------------------------------------------

	/**
	 * Information to be displayed next to the title.
	 *
	 * @return string The number of queries (in parentheses) or an empty string.
	 */
	public function getTitleDetails(): string
	{
		return '('.count(static::$queries).' Queries across '.count($this->connections).' Connection'.
		       (count($this->connections) > 1 ? 's' : '').')';
	}

	//--------------------------------------------------------------------

}
