<?php
/**
 * MySQL Functions Test
 *
 * Tests MySQL/database functions performance including crypto, math, string, datetime, and aggregate functions.
 *
 * @package     DiveWP
 * @author      Oleg Petrov
 * @version     1.0.4
 * @license     GPL-2.0-or-later
 */

// Exit if accessed directly
if (!defined('ABSPATH')) {
    die(esc_html__('Direct access not permitted.', 'divewp-boost-site-performance'));
}

/**
 * MySQL Functions Test Implementation
 */
class DiveWP_MySQL_Functions_Test {

    /**
     * Run MySQL functions test
     *
     * Tests:
     * 4. Crypto Functions - Encryption and hash operations: 1,000 operations (single run)
     * 5. Math Functions - Mathematical calculations: 5,000 operations (single run)
     * 6. String Functions - Text processing operations: 3,000 operations (single run)
     * 7. DateTime Functions - Date and time operations: 5,000 operations (single run)
     * 8. Aggregate Functions - SUM, COUNT, AVG operations: 100 operations (single run, 1,000 rows)
     *
     * @param array $config Test configuration
     * @return array Test results
     */
    public static function run($config = array()) {
        $defaults = array(
            'crypto_operations' => 1000,
            'math_operations' => 5000,
            'string_operations' => 3000,
            'datetime_operations' => 5000,
            'aggregate_operations' => 100,
            'aggregate_rows' => 1000
        );
        $config = array_merge($defaults, $config);

        $results = array();

        // Run Crypto Functions test
        $results['crypto'] = self::run_crypto_test($config);

        // Run Math Functions test
        $results['math'] = self::run_math_test($config);

        // Run String Functions test
        $results['string'] = self::run_string_test($config);

        // Run DateTime Functions test
        $results['datetime'] = self::run_datetime_test($config);

        // Run Aggregate Functions test
        $results['aggregate'] = self::run_aggregate_test($config);

        return array(
            'test_name' => 'MySQL Functions',
            'sub_tests' => $results,
            'status' => 'completed',
            'message' => 'All MySQL functions tests completed successfully'
        );
    }

    /**
     * Run crypto functions test
     *
     * @param array $config Test configuration
     * @return array Test results
     */
    private static function run_crypto_test($config) {
        $start_time = microtime(true);

        // TODO: Implement actual crypto operations
        for ($i = 0; $i < $config['crypto_operations']; $i++) {
            // Crypto operations simulation will go here
            $data = 'sample_data_' . $i;
            $hash = hash('sha256', $data);
            $encoded = base64_encode($data);
        }

        $total_time = microtime(true) - $start_time;

        return array(
            'function_type' => 'Crypto Functions',
            'purpose' => 'Encryption and hash operations',
            'total_time' => $total_time,
            'operations' => $config['crypto_operations'],
            'avg_time_per_operation' => $total_time / $config['crypto_operations']
        );
    }

    /**
     * Run math functions test
     *
     * @param array $config Test configuration
     * @return array Test results
     */
    private static function run_math_test($config) {
        $start_time = microtime(true);

        // TODO: Implement actual math operations
        for ($i = 0; $i < $config['math_operations']; $i++) {
            // Math operations simulation will go here
            $result = sqrt($i) + sin($i) + cos($i) + log($i + 1);
            $power = pow($i, 2);
            $round = round($result, 2);
        }

        $total_time = microtime(true) - $start_time;

        return array(
            'function_type' => 'Math Functions',
            'purpose' => 'Mathematical calculations',
            'total_time' => $total_time,
            'operations' => $config['math_operations'],
            'avg_time_per_operation' => $total_time / $config['math_operations']
        );
    }

    /**
     * Run string functions test
     *
     * @param array $config Test configuration
     * @return array Test results
     */
    private static function run_string_test($config) {
        $start_time = microtime(true);

        // TODO: Implement actual string operations
        for ($i = 0; $i < $config['string_operations']; $i++) {
            // String operations simulation will go here
            $text = 'Sample text for processing ' . $i;
            $upper = strtoupper($text);
            $lower = strtolower($text);
            $length = strlen($text);
            $substring = substr($text, 0, 10);
            $replaced = str_replace('Sample', 'Test', $text);
        }

        $total_time = microtime(true) - $start_time;

        return array(
            'function_type' => 'String Functions',
            'purpose' => 'Text processing operations',
            'total_time' => $total_time,
            'operations' => $config['string_operations'],
            'avg_time_per_operation' => $total_time / $config['string_operations']
        );
    }

    /**
     * Run datetime functions test
     *
     * @param array $config Test configuration
     * @return array Test results
     */
    private static function run_datetime_test($config) {
        $start_time = microtime(true);

        // TODO: Implement actual datetime operations
        for ($i = 0; $i < $config['datetime_operations']; $i++) {
            // DateTime operations simulation will go here
            $current_time = current_time('mysql');
            $timestamp = strtotime($current_time);
            $formatted = wp_date('Y-m-d H:i:s', $timestamp + $i);
            $day_of_week = wp_date('w', $timestamp);
            $month = wp_date('n', $timestamp);
        }

        $total_time = microtime(true) - $start_time;

        return array(
            'function_type' => 'DateTime Functions',
            'purpose' => 'Date and time operations',
            'total_time' => $total_time,
            'operations' => $config['datetime_operations'],
            'avg_time_per_operation' => $total_time / $config['datetime_operations']
        );
    }

    /**
     * Run aggregate functions test
     *
     * @param array $config Test configuration
     * @return array Test results
     */
    private static function run_aggregate_test($config) {
        $start_time = microtime(true);

        // TODO: Implement actual aggregate operations
        for ($i = 0; $i < $config['aggregate_operations']; $i++) {
            // Aggregate operations simulation will go here
            // Simulate processing rows for SUM, COUNT, AVG operations
            $sum = 0;
            $count = $config['aggregate_rows'];
            
            for ($j = 0; $j < $config['aggregate_rows']; $j++) {
                $sum += $j;
            }
            
            $average = $sum / $count;
            $max = $config['aggregate_rows'] - 1;
            $min = 0;
        }

        $total_time = microtime(true) - $start_time;

        return array(
            'function_type' => 'Aggregate Functions',
            'purpose' => 'SUM, COUNT, AVG operations',
            'total_time' => $total_time,
            'operations' => $config['aggregate_operations'],
            'rows_per_operation' => $config['aggregate_rows'],
            'total_rows_processed' => $config['aggregate_operations'] * $config['aggregate_rows'],
            'avg_time_per_operation' => $total_time / $config['aggregate_operations']
        );
    }
} 