<?php
/**
 * HVAC Test Environment Class
 *
 * Handles test environment setup, transaction management, and cleanup.
 */

class HVAC_Test_Environment {
    /**
     * @var wpdb WordPress database instance
     */
    private $wpdb;

    /**
     * @var array List of created test user IDs for cleanup
     */
    private $test_user_ids = array();

    /**
     * Constructor
     */
    public function __construct() {
        global $wpdb;
        $this->wpdb = $wpdb;
    }

    /**
     * Set up the test environment
     */
    public function setUp() {
        // Start transaction
        $this->start_transaction();
        
        // Ensure TEC CE is active
        $this->activate_required_plugins();
        
        // Reset environment
        $this->reset_environment();
    }

    /**
     * Clean up after tests
     */
    public function tearDown() {
        // Rollback transaction
        $this->rollback_transaction();
        
        // Clean up test accounts
        $this->cleanup_test_accounts();
    }

    /**
     * Start a database transaction
     */
    private function start_transaction() {
        $this->wpdb->query('START TRANSACTION');
    }

    /**
     * Rollback the current transaction
     */
    private function rollback_transaction() {
        $this->wpdb->query('ROLLBACK');
    }

    /**
     * Activate required plugins
     *
     * @throws Exception If TEC CE plugin cannot be activated
     */
    private function activate_required_plugins() {
        if (!class_exists('Tribe__Events__Main')) {
            throw new Exception('The Events Calendar plugin is not active');
        }

        if (!class_exists('Tribe__Events__Community__Main')) {
            throw new Exception('The Events Calendar Community Events plugin is not active');
        }
    }

    /**
     * Reset the environment to a clean state
     */
    private function reset_environment() {
        // Clear any cached data
        wp_cache_flush();
        
        // Reset post data
        $this->reset_posts();
        
        // Reset user roles and capabilities
        $this->reset_roles();
    }

    /**
     * Reset posts and related data
     */
    private function reset_posts() {
        // Delete all test events
        $events = get_posts(array(
            'post_type' => 'tribe_events',
            'posts_per_page' => -1,
            'post_status' => 'any'
        ));

        foreach ($events as $event) {
            wp_delete_post($event->ID, true);
        }
    }

    /**
     * Reset user roles to default state
     */
    private function reset_roles() {
        // Refresh roles
        wp_roles()->reinit();
    }

    /**
     * Clean up test user accounts
     */
    private function cleanup_test_accounts() {
        foreach ($this->test_user_ids as $user_id) {
            wp_delete_user($user_id, true);
        }
        $this->test_user_ids = array();
    }

    /**
     * Register a test user for cleanup
     *
     * @param int $user_id The ID of the test user to register
     */
    public function register_test_user($user_id) {
        $this->test_user_ids[] = $user_id;
    }

    /**
     * Check if the test environment is properly set up
     *
     * @return bool True if environment is ready
     */
    public function is_ready() {
        return class_exists('Tribe__Events__Main') && 
               class_exists('Tribe__Events__Community__Main') && 
               $this->wpdb->get_var("SELECT @@autocommit") == 0;
    }
}