<?php
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

class PC_Membership_Admin {

    public static function init() {
        add_action( 'admin_menu', array( __CLASS__, 'add_admin_menu' ) );
        add_action( 'admin_init', array( __CLASS__, 'register_settings' ) );
        add_action( 'admin_enqueue_scripts', array( __CLASS__, 'enqueue_assets' ) );
        add_action( 'wp_ajax_pc_membership_save_plan', array( __CLASS__, 'ajax_save_plan' ) );
        add_action( 'wp_ajax_pc_membership_delete_plan', array( __CLASS__, 'ajax_delete_plan' ) );
        add_action( 'wp_ajax_pc_membership_get_plan', array( __CLASS__, 'ajax_get_plan' ) );
        add_action( 'wp_ajax_pc_membership_get_stats', array( __CLASS__, 'ajax_get_stats' ) );
        add_action( 'wp_ajax_pc_membership_save_pages', array( __CLASS__, 'ajax_save_pages' ) );
        add_action( 'wp_ajax_pc_membership_save_access_rule', array( __CLASS__, 'ajax_save_access_rule' ) );
        add_action( 'wp_ajax_pc_membership_delete_access_rule', array( __CLASS__, 'ajax_delete_access_rule' ) );
        add_action( 'wp_ajax_pc_membership_get_content_for_rule', array( __CLASS__, 'ajax_get_content_for_rule' ) );
    }

    public static function add_admin_menu() {
        add_menu_page(
            __( 'Membership', 'pc-membership-abc123' ),
            __( 'Membership', 'pc-membership-abc123' ),
            'manage_options',
            'pc-membership',
            array( __CLASS__, 'dashboard_page' ),
            'dashicons-id',
            81
        );

        add_submenu_page( 'pc-membership', __( 'Dashboard', 'pc-membership-abc123' ), __( 'Dashboard', 'pc-membership-abc123' ), 'manage_options', 'pc-membership', array( __CLASS__, 'dashboard_page' ) );
        add_submenu_page( 'pc-membership', __( 'Plans', 'pc-membership-abc123' ), __( 'Plans', 'pc-membership-abc123' ), 'manage_options', 'pc-membership-plans', array( __CLASS__, 'plans_page' ) );
        add_submenu_page( 'pc-membership', __( 'Pages', 'pc-membership-abc123' ), __( 'Pages', 'pc-membership-abc123' ), 'manage_options', 'pc-membership-pages', array( __CLASS__, 'pages_page' ) );
        add_submenu_page( 'pc-membership', __( 'Access Rules', 'pc-membership-abc123' ), __( 'Access Rules', 'pc-membership-abc123' ), 'manage_options', 'pc-membership-access', array( __CLASS__, 'access_page' ) );
        add_submenu_page( 'pc-membership', __( 'Settings', 'pc-membership-abc123' ), __( 'Settings', 'pc-membership-abc123' ), 'manage_options', 'pc-membership-settings', array( __CLASS__, 'settings_page' ) );
    }

    public static function register_settings() {
        register_setting( 'pc_membership_options', 'pc_membership_options', array( __CLASS__, 'sanitize_options' ) );

        add_settings_section( 'pc_membership_stripe', __( 'Stripe Configuration', 'pc-membership-abc123' ), '__return_false', 'pc-membership-settings' );
        add_settings_field( 'test_publishable_key', __( 'Test Publishable Key', 'pc-membership-abc123' ), array( __CLASS__, 'field_publishable_key' ), 'pc-membership-settings', 'pc_membership_stripe', array( 'key_type' => 'test' ) );
        add_settings_field( 'test_secret_key', __( 'Test Secret Key', 'pc-membership-abc123' ), array( __CLASS__, 'field_secret_key' ), 'pc-membership-settings', 'pc_membership_stripe', array( 'key_type' => 'test' ) );
        add_settings_field( 'live_publishable_key', __( 'Live Publishable Key', 'pc-membership-abc123' ), array( __CLASS__, 'field_publishable_key' ), 'pc-membership-settings', 'pc_membership_stripe', array( 'key_type' => 'live' ) );
        add_settings_field( 'live_secret_key', __( 'Live Secret Key', 'pc-membership-abc123' ), array( __CLASS__, 'field_secret_key' ), 'pc-membership-settings', 'pc_membership_stripe', array( 'key_type' => 'live' ) );
        add_settings_field( 'webhook_secret', __( 'Webhook Secret', 'pc-membership-abc123' ), array( __CLASS__, 'field_webhook_secret' ), 'pc-membership-settings', 'pc_membership_stripe' );
        add_settings_field( 'mode', __( 'Mode', 'pc-membership-abc123' ), array( __CLASS__, 'field_mode' ), 'pc-membership-settings', 'pc_membership_stripe' );

        add_settings_section( 'pc_membership_general', __( 'General Settings', 'pc-membership-abc123' ), '__return_false', 'pc-membership-settings' );
        add_settings_field( 'currency', __( 'Currency', 'pc-membership-abc123' ), array( __CLASS__, 'field_currency' ), 'pc-membership-settings', 'pc_membership_general' );
    }

    public static function sanitize_options( $input ) {
        $output = array();
        foreach ( array( 'test_publishable_key', 'test_secret_key', 'live_publishable_key', 'live_secret_key', 'webhook_secret' ) as $key ) {
            if ( isset( $input[ $key ] ) ) {
                $output[ $key ] = sanitize_text_field( $input[ $key ] );
            }
        }
        if ( isset( $input['mode'] ) && in_array( $input['mode'], array( 'test', 'live' ) ) ) {
            $output['mode'] = $input['mode'];
        }
        if ( isset( $input['currency'] ) && in_array( $input['currency'], array( 'usd', 'eur', 'gbp' ) ) ) {
            $output['currency'] = $input['currency'];
        }
        return $output;
    }

    public static function field_publishable_key( $args ) {
        $options = get_option( 'pc_membership_options' );
        $key = $args['key_type'] . '_publishable_key';
        $value = isset( $options[ $key ] ) ? esc_attr( $options[ $key ] ) : '';
        echo '<input type="text" name="pc_membership_options[' . esc_attr( $key ) . ']" value="' . $value . '" class="regular-text" placeholder="pk_test_..." />';
        echo '<p class="description">' . esc_html__( 'Your Stripe publishable key from the Stripe dashboard.', 'pc-membership-abc123' ) . '</p>';
    }

    public static function field_secret_key( $args ) {
        $options = get_option( 'pc_membership_options' );
        $key = $args['key_type'] . '_secret_key';
        $value = isset( $options[ $key ] ) ? esc_attr( $options[ $key ] ) : '';
        echo '<input type="password" name="pc_membership_options[' . esc_attr( $key ) . ']" value="' . $value . '" class="regular-text" autocomplete="new-password" placeholder="sk_test_..." />';
        echo '<p class="description">' . esc_html__( 'Your Stripe secret key from the Stripe dashboard.', 'pc-membership-abc123' ) . '</p>';
    }

    public static function field_webhook_secret() {
        $options = get_option( 'pc_membership_options' );
        $value = isset( $options['webhook_secret'] ) ? esc_attr( $options['webhook_secret'] ) : '';
        echo '<input type="text" name="pc_membership_options[webhook_secret]" value="' . $value . '" class="regular-text" placeholder="whsec_..." />';
        echo '<p class="description">' . esc_html__( 'Webhook secret for handling Stripe events.', 'pc-membership-abc123' ) . '</p>';
    }

    public static function field_mode() {
        $options = get_option( 'pc_membership_options' );
        $mode = isset( $options['mode'] ) ? $options['mode'] : 'test';
        echo '<select name="pc_membership_options[mode]">';
        echo '<option value="test"' . selected( $mode, 'test', false ) . '>' . esc_html__( 'Test Mode', 'pc-membership-abc123' ) . '</option>';
        echo '<option value="live"' . selected( $mode, 'live', false ) . '>' . esc_html__( 'Live Mode', 'pc-membership-abc123' ) . '</option>';
        echo '</select>';
        echo '<p class="description">' . esc_html__( 'Use test mode for development. Switch to live mode when ready for production.', 'pc-membership-abc123' ) . '</p>';
    }

    public static function field_currency() {
        $options = get_option( 'pc_membership_options' );
        $currency = isset( $options['currency'] ) ? $options['currency'] : 'usd';
        echo '<select name="pc_membership_options[currency]">';
        echo '<option value="usd"' . selected( $currency, 'usd', false ) . '>USD ($)</option>';
        echo '<option value="eur"' . selected( $currency, 'eur', false ) . '>EUR (€)</option>';
        echo '<option value="gbp"' . selected( $currency, 'gbp', false ) . '>GBP (£)</option>';
        echo '</select>';
    }

    public static function dashboard_page() {
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_die( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }
        ?>
        <div class="wrap pc-membership-admin-wrap">
            <h1><?php esc_html_e( 'Membership Dashboard', 'pc-membership-abc123' ); ?></h1>
            <div class="pc-membership-dashboard-cards">
                <div class="pc-membership-card">
                    <div class="pc-membership-card-header">
                        <span class="dashicons dashicons-groups"></span>
                        <h3><?php esc_html_e( 'Active Members', 'pc-membership-abc123' ); ?></h3>
                    </div>
                    <div class="pc-membership-card-body">
                        <div class="pc-membership-stat" id="pc-members-count">-</div>
                    </div>
                </div>
                <div class="pc-membership-card">
                    <div class="pc-membership-card-header">
                        <span class="dashicons dashicons-cart"></span>
                        <h3><?php esc_html_e( 'Active Subscriptions', 'pc-membership-abc123' ); ?></h3>
                    </div>
                    <div class="pc-membership-card-body">
                        <div class="pc-membership-stat" id="pc-subscriptions-count">-</div>
                    </div>
                </div>
                <div class="pc-membership-card">
                    <div class="pc-membership-card-header">
                        <span class="dashicons dashicons-chart-area"></span>
                        <h3><?php esc_html_e( 'Revenue This Month', 'pc-membership-abc123' ); ?></h3>
                    </div>
                    <div class="pc-membership-card-body">
                        <div class="pc-membership-stat" id="pc-revenue">-</div>
                    </div>
                </div>
                <div class="pc-membership-card">
                    <div class="pc-membership-card-header">
                        <span class="dashicons dashicons-pressthis"></span>
                        <h3><?php esc_html_e( 'Total Plans', 'pc-membership-abc123' ); ?></h3>
                    </div>
                    <div class="pc-membership-card-body">
                        <div class="pc-membership-stat" id="pc-plans-count">-</div>
                    </div>
                </div>
            </div>
            <div class="pc-membership-dashboard-section">
                <h2><?php esc_html_e( 'Recent Subscriptions', 'pc-membership-abc123' ); ?></h2>
                <div class="pc-membership-table-wrapper">
                    <table class="widefat fixed striped pc-membership-table" id="pc-recent-subscriptions">
                        <thead>
                            <tr>
                                <th><?php esc_html_e( 'User', 'pc-membership-abc123' ); ?></th>
                                <th><?php esc_html_e( 'Plan', 'pc-membership-abc123' ); ?></th>
                                <th><?php esc_html_e( 'Status', 'pc-membership-abc123' ); ?></th>
                                <th><?php esc_html_e( 'Started', 'pc-membership-abc123' ); ?></th>
                            </tr>
                        </thead>
                        <tbody>
                            <tr><td colspan="4"><?php esc_html_e( 'Loading...', 'pc-membership-abc123' ); ?></td></tr>
                        </tbody>
                    </table>
                </div>
            </div>
        </div>
        <?php
    }

    public static function plans_page() {
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_die( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }

        global $wpdb;
        $plans = $wpdb->get_results( "SELECT * FROM {$wpdb->prefix}pc_membership_plans ORDER BY id DESC" );
        ?>
        <div class="wrap pc-membership-admin-wrap">
            <h1><?php esc_html_e( 'Membership Plans', 'pc-membership-abc123' ); ?>
                <a href="#" class="page-title-action pc-membership-add-plan-btn"><?php esc_html_e( 'Add New Plan', 'pc-membership-abc123' ); ?></a>
            </h1>

            <?php if ( empty( $plans ) ) : ?>
                <div class="pc-membership-empty-state">
                    <span class="dashicons dashicons-pressthis" style="font-size: 48px; height: 48px; width: 48px;"></span>
                    <h3><?php esc_html_e( 'No plans yet', 'pc-membership-abc123' ); ?></h3>
                    <p><?php esc_html_e( 'Create your first membership plan to get started.', 'pc-membership-abc123' ); ?></p>
                    <button class="button button-primary pc-membership-add-plan-btn"><?php esc_html_e( 'Add First Plan', 'pc-membership-abc123' ); ?></button>
                </div>
            <?php else : ?>
                <table class="widefat fixed striped pc-membership-table">
                    <thead>
                        <tr>
                            <th><?php esc_html_e( 'ID', 'pc-membership-abc123' ); ?></th>
                            <th><?php esc_html_e( 'Name', 'pc-membership-abc123' ); ?></th>
                            <th><?php esc_html_e( 'Type', 'pc-membership-abc123' ); ?></th>
                            <th><?php esc_html_e( 'Price', 'pc-membership-abc123' ); ?></th>
                            <th><?php esc_html_e( 'Billing', 'pc-membership-abc123' ); ?></th>
                            <th><?php esc_html_e( 'Members', 'pc-membership-abc123' ); ?></th>
                            <th><?php esc_html_e( 'Actions', 'pc-membership-abc123' ); ?></th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php foreach ( $plans as $plan ) :
                            $type_label = $plan->is_subscription ? __( 'Subscription', 'pc-membership-abc123' ) : __( 'One-time', 'pc-membership-abc123' );
                            $billing_label = $plan->is_subscription ? sprintf( '%s / %s', pc_membership_format_price( $plan->price ), $plan->billing_interval ) : pc_membership_format_price( $plan->price );
                            $members_count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM {$wpdb->prefix}pc_membership_subscriptions WHERE plan_id = %d AND status = 'active'", $plan->id ) );
                        ?>
                            <tr>
                                <td><?php echo esc_html( $plan->id ); ?></td>
                                <td><strong><?php echo esc_html( $plan->name ); ?></strong></td>
                                <td><?php echo esc_html( $type_label ); ?></td>
                                <td><?php echo esc_html( pc_membership_format_price( $plan->price ) ); ?></td>
                                <td><?php echo esc_html( $billing_label ); ?></td>
                                <td><?php echo esc_html( (string) $members_count ); ?></td>
                                <td>
                                    <button class="button pc-membership-edit-plan" data-plan-id="<?php echo esc_attr( $plan->id ); ?>"><?php esc_html_e( 'Edit', 'pc-membership-abc123' ); ?></button>
                                    <button class="button pc-membership-delete-plan" data-plan-id="<?php echo esc_attr( $plan->id ); ?>"><?php esc_html_e( 'Delete', 'pc-membership-abc123' ); ?></button>
                                </td>
                            </tr>
                        <?php endforeach; ?>
                    </tbody>
                </table>
            <?php endif; ?>

            <div id="pc-membership-plan-modal" class="pc-membership-modal" style="display: none;">
                <div class="pc-membership-modal-content">
                    <div class="pc-membership-modal-header">
                        <h2><?php esc_html_e( 'Membership Plan', 'pc-membership-abc123' ); ?></h2>
                        <button class="pc-membership-modal-close">&times;</button>
                    </div>
                    <form id="pc-membership-plan-form" method="post">
                        <?php wp_nonce_field( 'pc_membership_save_plan', 'pc_membership_plan_nonce' ); ?>
                        <input type="hidden" name="plan_id" id="plan_id" value="">
                        <div class="pc-membership-form-row">
                            <label for="plan_name"><?php esc_html_e( 'Plan Name', 'pc-membership-abc123' ); ?> *</label>
                            <input type="text" name="name" id="plan_name" required class="regular-text">
                        </div>
                        <div class="pc-membership-form-row">
                            <label for="plan_description"><?php esc_html_e( 'Description', 'pc-membership-abc123' ); ?></label>
                            <textarea name="description" id="plan_description" rows="3" class="regular-text"></textarea>
                        </div>
                        <div class="pc-membership-form-row">
                            <label for="plan_type"><?php esc_html_e( 'Pricing Type', 'pc-membership-abc123' ); ?></label>
                            <select name="is_subscription" id="plan_type">
                                <option value="0"><?php esc_html_e( 'One-time Payment', 'pc-membership-abc123' ); ?></option>
                                <option value="1"><?php esc_html_e( 'Subscription', 'pc-membership-abc123' ); ?></option>
                            </select>
                        </div>
                        <div class="pc-membership-form-row">
                            <label for="plan_price"><?php esc_html_e( 'Price', 'pc-membership-abc123' ); ?> *</label>
                            <input type="number" name="price" id="plan_price" step="0.01" min="0" required class="regular-text">
                        </div>
                        <div class="pc-membership-form-row" id="billing_interval_row" style="display: none;">
                            <label for="plan_billing_interval"><?php esc_html_e( 'Billing Interval', 'pc-membership-abc123' ); ?></label>
                            <select name="billing_interval" id="plan_billing_interval">
                                <option value="day"><?php esc_html_e( 'Daily', 'pc-membership-abc123' ); ?></option>
                                <option value="week"><?php esc_html_e( 'Weekly', 'pc-membership-abc123' ); ?></option>
                                <option value="month" selected><?php esc_html_e( 'Monthly', 'pc-membership-abc123' ); ?></option>
                                <option value="year"><?php esc_html_e( 'Yearly', 'pc-membership-abc123' ); ?></option>
                            </select>
                        </div>
                        <div class="pc-membership-form-row">
                            <label for="plan_trial_days"><?php esc_html_e( 'Trial Period (Days)', 'pc-membership-abc123' ); ?></label>
                            <input type="number" name="trial_days" id="plan_trial_days" min="0" value="0" class="regular-text">
                            <p class="description"><?php esc_html_e( 'Number of free trial days before billing starts. Set to 0 for no trial.', 'pc-membership-abc123' ); ?></p>
                        </div>
                        <div class="pc-membership-form-row">
                            <label for="plan_benefits"><?php esc_html_e( 'Benefits', 'pc-membership-abc123' ); ?></label>
                            <textarea name="benefits" id="plan_benefits" rows="5" class="regular-text" placeholder="- Unlimited access&#10;- Priority support"></textarea>
                            <p class="description"><?php esc_html_e( 'Enter one benefit per line.', 'pc-membership-abc123' ); ?></p>
                        </div>
                        <div class="pc-membership-form-row">
                            <label for="plan_role"><?php esc_html_e( 'User Role', 'pc-membership-abc123' ); ?></label>
                            <select name="role" id="plan_role">
                                <?php foreach ( self::get_available_roles() as $role_key => $role_name ) : ?>
                                    <option value="<?php echo esc_attr( $role_key ); ?>"><?php echo esc_html( $role_name ); ?></option>
                                <?php endforeach; ?>
                            </select>
                        </div>
                        <div class="pc-membership-form-actions">
                            <button type="submit" class="button button-primary"><?php esc_html_e( 'Save Plan', 'pc-membership-abc123' ); ?></button>
                            <button type="button" class="button pc-membership-modal-cancel"><?php esc_html_e( 'Cancel', 'pc-membership-abc123' ); ?></button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
        <?php
    }

    private static function get_available_roles() {
        $roles = get_editable_roles();
        $options = array();
        foreach ( $roles as $role_key => $role_data ) {
            $options[ $role_key ] = translate_user_role( $role_data['name'] );
        }
        return $options;
    }

    public static function ajax_save_plan() {
        check_ajax_referer( 'pc_membership_save_plan', 'nonce' );
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_send_json_error( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }

        global $wpdb;
        $plan_id = isset( $_POST['plan_id'] ) ? absint( $_POST['plan_id'] ) : 0;
        $name = sanitize_text_field( wp_unslash( $_POST['name'] ) );
        $description = isset( $_POST['description'] ) ? sanitize_textarea_field( wp_unslash( $_POST['description'] ) ) : '';
        $price = isset( $_POST['price'] ) ? floatval( $_POST['price'] ) : 0;
        $is_subscription = isset( $_POST['is_subscription'] ) ? absint( $_POST['is_subscription'] ) : 0;
        $billing_interval = isset( $_POST['billing_interval'] ) ? sanitize_text_field( wp_unslash( $_POST['billing_interval'] ) ) : 'month';
        $trial_days = isset( $_POST['trial_days'] ) ? absint( $_POST['trial_days'] ) : 0;
        $benefits = isset( $_POST['benefits'] ) ? sanitize_textarea_field( wp_unslash( $_POST['benefits'] ) ) : '';
        $role = isset( $_POST['role'] ) ? sanitize_text_field( wp_unslash( $_POST['role'] ) ) : 'subscriber';

        if ( empty( $name ) || $price < 0 ) {
            wp_send_json_error( __( 'Invalid input data', 'pc-membership-abc123' ) );
        }

        $data = array(
            'name'              => $name,
            'description'       => $description,
            'price'             => $price,
            'is_subscription'   => $is_subscription,
            'billing_interval'  => $is_subscription ? $billing_interval : '',
            'trial_days'        => $trial_days,
            'benefits'          => $benefits,
            'role'              => $role,
        );

        if ( $plan_id ) {
            $result = $wpdb->update( $wpdb->prefix . 'pc_membership_plans', $data, array( 'id' => $plan_id ) );
        } else {
            $result = $wpdb->insert( $wpdb->prefix . 'pc_membership_plans', $data );
            $plan_id = $wpdb->insert_id;
        }

        if ( $result === false ) {
            wp_send_json_error( __( 'Failed to save plan', 'pc-membership-abc123' ) );
        }
        wp_send_json_success( array( 'plan_id' => $plan_id ) );
    }

    public static function ajax_get_plan() {
        check_ajax_referer( 'pc_membership_save_plan', 'nonce' );
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_send_json_error( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }

        $plan_id = isset( $_POST['plan_id'] ) ? absint( $_POST['plan_id'] ) : 0;
        if ( ! $plan_id ) {
            wp_send_json_error( __( 'Invalid plan ID', 'pc-membership-abc123' ) );
        }

        global $wpdb;
        $plan = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->prefix}pc_membership_plans WHERE id = %d", $plan_id ) );

        if ( ! $plan ) {
            wp_send_json_error( __( 'Plan not found', 'pc-membership-abc123' ) );
        }
        wp_send_json_success( array( 'plan' => $plan ) );
    }

    public static function ajax_delete_plan() {
        check_ajax_referer( 'pc_membership_save_plan', 'nonce' );
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_send_json_error( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }

        $plan_id = isset( $_POST['plan_id'] ) ? absint( $_POST['plan_id'] ) : 0;
        if ( ! $plan_id ) {
            wp_send_json_error( __( 'Invalid plan ID', 'pc-membership-abc123' ) );
        }

        global $wpdb;
        $wpdb->delete( $wpdb->prefix . 'pc_membership_subscriptions', array( 'plan_id' => $plan_id ) );
        $result = $wpdb->delete( $wpdb->prefix . 'pc_membership_plans', array( 'id' => $plan_id ) );

        if ( $result === false ) {
            wp_send_json_error( __( 'Failed to delete plan', 'pc-membership-abc123' ) );
        }
        wp_send_json_success();
    }

    public static function ajax_get_stats() {
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_send_json_error( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }

        global $wpdb;
        $active_members = $wpdb->get_var( "SELECT COUNT(DISTINCT user_id) FROM {$wpdb->prefix}pc_membership_subscriptions WHERE status = 'active'" );
        $active_subscriptions = $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->prefix}pc_membership_subscriptions WHERE status = 'active'" );
        $total_plans = $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->prefix}pc_membership_plans" );
        $current_month = date( 'Y-m-01' );
        $revenue = $wpdb->get_var( $wpdb->prepare( "SELECT COALESCE(SUM(amount), 0) FROM {$wpdb->prefix}pc_membership_payments WHERE status = 'succeeded' AND created_at >= %s", $current_month ) );
        $recent_subs = $wpdb->get_results( "SELECT s.*, u.display_name, u.user_login, p.name as plan_name FROM {$wpdb->prefix}pc_membership_subscriptions s LEFT JOIN {$wpdb->users} u ON s.user_id = u.ID LEFT JOIN {$wpdb->prefix}pc_membership_plans p ON s.plan_id = p.id ORDER BY s.created_at DESC LIMIT 10" );

        wp_send_json_success( array(
            'active_members'    => $active_members,
            'active_subscriptions' => $active_subscriptions,
            'total_plans'       => $total_plans,
            'revenue'           => pc_membership_format_price( $revenue ),
            'recent_subscriptions' => $recent_subs,
        ) );
    }

    public static function ajax_save_pages() {
        check_ajax_referer( 'pc_membership_save_pages', 'nonce' );
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_send_json_error( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }

        if ( isset( $_POST['pc_membership_options'] ) ) {
            $options = get_option( 'pc_membership_options', array() );
            foreach ( $_POST['pc_membership_options'] as $key => $value ) {
                $options[ $key ] = absint( $value );
            }
            update_option( 'pc_membership_options', $options );
        }
        wp_send_json_success();
    }

    public static function pages_page() {
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_die( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }

        $options = get_option( 'pc_membership_options', array() );
        $page_fields = array(
            'checkout' => __( 'Checkout Page', 'pc-membership-abc123' ),
            'login' => __( 'Login Page', 'pc-membership-abc123' ),
            'register' => __( 'Registration Page', 'pc-membership-abc123' ),
            'account' => __( 'Account Page', 'pc-membership-abc123' ),
            'success' => __( 'Success Page', 'pc-membership-abc123' ),
            'cancel' => __( 'Cancel Page', 'pc-membership-abc123' ),
        );
        $pages = get_pages( array( 'post_status' => 'publish' ) );
        ?>
        <div class="wrap pc-membership-admin-wrap">
            <h1><?php esc_html_e( 'Membership Pages', 'pc-membership-abc123' ); ?></h1>
            <form method="post" action="<?php echo esc_url( admin_url( 'admin.php?page=pc-membership-pages' ) ); ?>">
                <?php wp_nonce_field( 'pc_membership_save_pages', 'pc_membership_pages_nonce' ); ?>
                <div class="pc-membership-page-settings">
                    <?php foreach ( $page_fields as $key => $label ) :
                        $selected = isset( $options[ $key . '_page_id' ] ) ? absint( $options[ $key . '_page_id' ] ) : 0;
                    ?>
                        <div class="pc-membership-page-setting">
                            <label for="<?php echo esc_attr( 'page_' . $key ); ?>"><strong><?php echo esc_html( $label ); ?></strong></label>
                            <select name="pc_membership_options[<?php echo esc_attr( $key . '_page_id' ); ?>]" id="<?php echo esc_attr( 'page_' . $key ); ?>">
                                <option value="0"><?php esc_html_e( '-- Select --', 'pc-membership-abc123' ); ?></option>
                                <?php foreach ( $pages as $page ) : ?>
                                    <option value="<?php echo esc_attr( $page->ID ); ?>" <?php selected( $selected, $page->ID ); ?>>
                                        <?php echo esc_html( $page->post_title ); ?>
                                    </option>
                                <?php endforeach; ?>
                            </select>
                        </div>
                    <?php endforeach; ?>
                </div>
                <?php submit_button( __( 'Save Page Settings', 'pc-membership-abc123' ) ); ?>
            </form>
            <hr>
            <h2><?php esc_html_e( 'Quick Create Pages', 'pc-membership-abc123' ); ?></h2>
            <form method="post" action="<?php echo esc_url( admin_url( 'admin.php?page=pc-membership-pages' ) ); ?>">
                <?php wp_nonce_field( 'pc_membership_create_pages', 'pc_membership_create_pages_nonce' ); ?>
                <input type="hidden" name="pc_membership_create_pages" value="1">
                <?php submit_button( __( 'Create All Pages', 'pc-membership-abc123' ), 'secondary' ); ?>
            </form>
        </div>
        <?php
        if ( isset( $_POST['pc_membership_create_pages'] ) && check_admin_referer( 'pc_membership_create_pages', 'pc_membership_create_pages_nonce' ) ) {
            self::create_default_pages();
        }
    }

    private static function create_default_pages() {
        $pages = array(
            'checkout' => array( 'title' => __( 'Membership Checkout', 'pc-membership-abc123' ), 'content' => '[pc_membership_checkout]' ),
            'login' => array( 'title' => __( 'Member Login', 'pc-membership-abc123' ), 'content' => '[pc_membership_login]' ),
            'register' => array( 'title' => __( 'Member Registration', 'pc-membership-abc123' ), 'content' => '[pc_membership_register]' ),
            'account' => array( 'title' => __( 'My Account', 'pc-membership-abc123' ), 'content' => '[pc_membership_account]' ),
            'success' => array( 'title' => __( 'Payment Successful', 'pc-membership-abc123' ), 'content' => '[pc_membership_success]' ),
            'cancel' => array( 'title' => __( 'Payment Cancelled', 'pc-membership-abc123' ), 'content' => '[pc_membership_cancel]' ),
        );

        $options = get_option( 'pc_membership_options', array() );
        foreach ( $pages as $key => $page_data ) {
            $existing_id = isset( $options[ $key . '_page_id' ] ) ? absint( $options[ $key . '_page_id' ] ) : 0;
            if ( ! $existing_id || ! get_post( $existing_id ) ) {
                $page_id = wp_insert_post( array( 'post_title' => $page_data['title'], 'post_content' => $page_data['content'], 'post_status' => 'publish', 'post_type' => 'page' ) );
                if ( $page_id && ! is_wp_error( $page_id ) ) {
                    $options[ $key . '_page_id' ] = $page_id;
                }
            }
        }
        update_option( 'pc_membership_options', $options );
        echo '<div class="notice notice-success"><p>' . esc_html__( 'Membership pages created successfully!', 'pc-membership-abc123' ) . '</p></div>';
    }

    public static function access_page() {
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_die( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }

        global $wpdb;
        $plans = $wpdb->get_results( "SELECT id, name FROM {$wpdb->prefix}pc_membership_plans" );
        $rules = $wpdb->get_results( "SELECT * FROM {$wpdb->prefix}pc_membership_access_rules ORDER BY id DESC" );
        ?>
        <div class="wrap pc-membership-admin-wrap">
            <h1><?php esc_html_e( 'Access Rules', 'pc-membership-abc123' ); ?></h1>
            <div class="pc-membership-access-rules">
                <h2><?php esc_html_e( 'Add New Rule', 'pc-membership-abc123' ); ?></h2>
                <form id="pc-membership-access-form" class="pc-membership-access-form">
                    <?php wp_nonce_field( 'pc_membership_save_access_rule', 'pc_membership_access_nonce' ); ?>
                    <div class="pc-membership-form-row">
                        <label for="access_content_type"><?php esc_html_e( 'Content Type', 'pc-membership-abc123' ); ?></label>
                        <select name="content_type" id="access_content_type" required>
                            <option value="page"><?php esc_html_e( 'Page', 'pc-membership-abc123' ); ?></option>
                            <option value="post"><?php esc_html_e( 'Post', 'pc-membership-abc123' ); ?></option>
                            <option value="category"><?php esc_html_e( 'Category', 'pc-membership-abc123' ); ?></option>
                        </select>
                    </div>
                    <div class="pc-membership-form-row">
                        <label for="access_content_id"><?php esc_html_e( 'Select Content', 'pc-membership-abc123' ); ?></label>
                        <select name="content_id" id="access_content_id" required>
                            <option value=""><?php esc_html_e( '-- Select --', 'pc-membership-abc123' ); ?></option>
                        </select>
                    </div>
                    <div class="pc-membership-form-row">
                        <label for="access_plan_ids"><?php esc_html_e( 'Required Plans', 'pc-membership-abc123' ); ?></label>
                        <select name="plan_ids[]" id="access_plan_ids" multiple required>
                            <?php foreach ( $plans as $plan ) : ?>
                                <option value="<?php echo esc_attr( $plan->id ); ?>"><?php echo esc_html( $plan->name ); ?></option>
                            <?php endforeach; ?>
                        </select>
                    </div>
                    <div class="pc-membership-form-row">
                        <label for="access_redirect"><?php esc_html_e( 'Redirect Non-Members To', 'pc-membership-abc123' ); ?></label>
                        <select name="redirect" id="access_redirect">
                            <option value="checkout"><?php esc_html_e( 'Checkout Page', 'pc-membership-abc123' ); ?></option>
                            <option value="login"><?php esc_html_e( 'Login Page', 'pc-membership-abc123' ); ?></option>
                            <option value="custom"><?php esc_html_e( 'Custom URL', 'pc-membership-abc123' ); ?></option>
                        </select>
                    </div>
                    <div class="pc-membership-form-row" id="custom_redirect_row" style="display: none;">
                        <label for="access_custom_url"><?php esc_html_e( 'Custom URL', 'pc-membership-abc123' ); ?></label>
                        <input type="url" name="custom_url" id="access_custom_url" class="regular-text" placeholder="https://...">
                    </div>
                    <div class="pc-membership-form-actions">
                        <button type="submit" class="button button-primary"><?php esc_html_e( 'Add Rule', 'pc-membership-abc123' ); ?></button>
                    </div>
                </form>
                <h2><?php esc_html_e( 'Existing Rules', 'pc-membership-abc123' ); ?></h2>
                <table class="widefat fixed striped pc-membership-table" id="pc-access-rules-table">
                    <thead>
                        <tr>
                            <th><?php esc_html_e( 'Content', 'pc-membership-abc123' ); ?></th>
                            <th><?php esc_html_e( 'Required Plans', 'pc-membership-abc123' ); ?></th>
                            <th><?php esc_html_e( 'Redirect', 'pc-membership-abc123' ); ?></th>
                            <th><?php esc_html_e( 'Actions', 'pc-membership-abc123' ); ?></th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php if ( empty( $rules ) ) : ?>
                            <tr><td colspan="4"><?php esc_html_e( 'No access rules defined yet.', 'pc-membership-abc123' ); ?></td></tr>
                        <?php else : ?>
                            <?php foreach ( $rules as $rule ) :
                                $content_title = '';
                                if ( $rule->content_type === 'category' ) {
                                    $cat = get_term( $rule->content_id );
                                    $content_title = $cat ? $cat->name : sprintf( __( 'Category #%d', 'pc-membership-abc123' ), $rule->content_id );
                                } else {
                                    $post = get_post( $rule->content_id );
                                    $content_title = $post ? $post->post_title : sprintf( __( '%s #%d', 'pc-membership-abc123' ), $rule->content_type, $rule->content_id );
                                }
                                $plan_ids = maybe_unserialize( $rule->plan_ids );
                                if ( ! is_array( $plan_ids ) ) { $plan_ids = array( $plan_ids ); }
                                $plan_names = array();
                                foreach ( $plan_ids as $plan_id ) {
                                    $plan = $wpdb->get_var( $wpdb->prepare( "SELECT name FROM {$wpdb->prefix}pc_membership_plans WHERE id = %d", $plan_id ) );
                                    if ( $plan ) { $plan_names[] = $plan; }
                                }
                                $redirect_text = $rule->redirect_type === 'custom' ? esc_html__( 'Custom URL', 'pc-membership-abc123' ) : ( $rule->redirect_type === 'checkout' ? esc_html__( 'Checkout', 'pc-membership-abc123' ) : esc_html__( 'Login', 'pc-membership-abc123' ) );
                            ?>
                                <tr>
                                    <td><?php echo esc_html( $content_title ) . ' <span class="description">(' . esc_html( $rule->content_type ) . ')</span>'; ?></td>
                                    <td><?php echo esc_html( implode( ', ', $plan_names ) ); ?></td>
                                    <td><?php echo $redirect_text; ?></td>
                                    <td><button class="button pc-membership-delete-rule" data-rule-id="<?php echo esc_attr( $rule->id ); ?>"><?php esc_html_e( 'Delete', 'pc-membership-abc123' ); ?></button></td>
                                </tr>
                            <?php endforeach; ?>
                        <?php endif; ?>
                    </tbody>
                </table>
            </div>
        </div>
        <?php
    }

    public static function ajax_save_access_rule() {
        check_ajax_referer( 'pc_membership_save_access_rule', 'nonce' );
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_send_json_error( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }

        $content_type = sanitize_text_field( wp_unslash( $_POST['content_type'] ) );
        $content_id = absint( $_POST['content_id'] );
        $plan_ids = array_map( 'absint', (array) $_POST['plan_ids'] );
        $redirect = sanitize_text_field( wp_unslash( $_POST['redirect'] ) );
        $custom_url = isset( $_POST['custom_url'] ) ? esc_url_raw( wp_unslash( $_POST['custom_url'] ) ) : '';

        if ( ! in_array( $content_type, array( 'page', 'post', 'category' ) ) || empty( $plan_ids ) ) {
            wp_send_json_error( __( 'Invalid input', 'pc-membership-abc123' ) );
        }

        global $wpdb;
        $existing = $wpdb->get_var( $wpdb->prepare( "SELECT id FROM {$wpdb->prefix}pc_membership_access_rules WHERE content_type = %s AND content_id = %d", $content_type, $content_id ) );

        if ( $existing ) {
            wp_send_json_error( __( 'A rule for this content already exists.', 'pc-membership-abc123' ) );
        }

        $result = $wpdb->insert( $wpdb->prefix . 'pc_membership_access_rules', array(
            'content_type'  => $content_type,
            'content_id'    => $content_id,
            'plan_ids'      => maybe_serialize( $plan_ids ),
            'redirect_type' => $redirect,
            'custom_url'    => $redirect === 'custom' ? $custom_url : '',
        ) );

        if ( ! $result ) {
            wp_send_json_error( __( 'Failed to save rule', 'pc-membership-abc123' ) );
        }
        wp_send_json_success();
    }

    public static function ajax_delete_access_rule() {
        check_ajax_referer( 'pc_membership_save_access_rule', 'nonce' );
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_send_json_error( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }

        $rule_id = absint( $_POST['rule_id'] );
        global $wpdb;
        $result = $wpdb->delete( $wpdb->prefix . 'pc_membership_access_rules', array( 'id' => $rule_id ) );

        if ( ! $result ) {
            wp_send_json_error( __( 'Failed to delete rule', 'pc-membership-abc123' ) );
        }
        wp_send_json_success();
    }

    public static function ajax_get_content_for_rule() {
        check_ajax_referer( 'pc_membership_admin_nonce', 'nonce' );
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_send_json_error( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }

        $content_type = isset( $_POST['content_type'] ) ? sanitize_text_field( wp_unslash( $_POST['content_type'] ) ) : 'page';
        $items = array();

        if ( $content_type === 'page' ) {
            $pages = get_pages( array( 'post_status' => 'publish' ) );
            foreach ( $pages as $page ) { $items[] = array( 'id' => $page->ID, 'title' => $page->post_title ); }
        } elseif ( $content_type === 'post' ) {
            $posts = get_posts( array( 'post_status' => 'publish', 'posts_per_page' => -1 ) );
            foreach ( $posts as $post ) { $items[] = array( 'id' => $post->ID, 'title' => $post->post_title ); }
        } elseif ( $content_type === 'category' ) {
            $categories = get_categories( array( 'hide_empty' => false ) );
            foreach ( $categories as $cat ) { $items[] = array( 'id' => $cat->term_id, 'title' => $cat->name ); }
        }

        wp_send_json_success( array( 'items' => $items ) );
    }

    public static function settings_page() {
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_die( __( 'Unauthorized', 'pc-membership-abc123' ) );
        }
        ?>
        <div class="wrap pc-membership-admin-wrap">
            <h1><?php esc_html_e( 'Membership Settings', 'pc-membership-abc123' ); ?></h1>
            <form method="post" action="options.php">
                <?php settings_fields( 'pc_membership_options' ); do_settings_sections( 'pc-membership-settings' ); submit_button(); ?>
            </form>
        </div>
        <?php
    }

    public static function enqueue_assets( $hook ) {
        if ( strpos( $hook, 'pc-membership' ) === false ) {
            return;
        }

        wp_enqueue_style( 'pc-membership-admin-style', PC_MEMBERSHIP_PLUGIN_URL . 'admin/css/admin-style.css', array(), PC_MEMBERSHIP_VERSION );
        wp_enqueue_script( 'pc-membership-admin-script', PC_MEMBERSHIP_PLUGIN_URL . 'admin/js/admin-script.js', array( 'jquery', 'jquery-ui-dialog' ), PC_MEMBERSHIP_VERSION, true );

        wp_localize_script( 'pc-membership-admin-script', 'pcMembershipAdmin', array(
            'ajax_url' => admin_url( 'admin-ajax.php' ),
            'nonce'    => wp_create_nonce( 'pc_membership_admin_nonce' ),
            'i18n'     => array(
                'save'       => __( 'Save', 'pc-membership-abc123' ),
                'cancel'     => __( 'Cancel', 'pc-membership-abc123' ),
                'delete'     => __( 'Delete', 'pc-membership-abc123' ),
                'confirmDelete' => __( 'Are you sure you want to delete this plan?', 'pc-membership-abc123' ),
                'loading'    => __( 'Loading...', 'pc-membership-abc123' ),
                'success'    => __( 'Saved successfully', 'pc-membership-abc123' ),
                'error'      => __( 'An error occurred', 'pc-membership-abc123' ),
            ),
        ) );
    }
}