<?php
/**
 * Plugin Name: Admark CRM
 * Description: Sends WhatsApp messages via Admark CRM API for WooCommerce automation events. Supports Welcome, Add to Cart Reminder, Abandoned Cart, Order Confirmation, Payment Confirmation, Order Dispatch, Delivery Confirmation, Feedback, Reorder, and Campaign messages.
 * Version: 3.2.11
 * Author: Admark
 * License: GPLv2 or later
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain: admark-crm
 */

if ( ! defined( 'ABSPATH' ) ) { exit; }

// ==== DEFAULTS (used if options are empty) ====
define( 'WATS_API_BASE', 'https://verifiedwhatsapp.admarksolution.com/api/send/bytemplate' );
if ( ! defined( 'WATS_API_KEY' ) )          define( 'WATS_API_KEY', '' );
if ( ! defined( 'WATS_PHONE_NUMBER_ID' ) )  define( 'WATS_PHONE_NUMBER_ID', '' );
// =============================================

if ( ! function_exists( 'wats_str_starts_with' ) ) {
    function wats_str_starts_with( $haystack, $needle ) {
        $haystack = (string) $haystack;
        $needle   = (string) $needle;
        if ( $needle === '' ) { return true; }
        return strncmp( $haystack, $needle, strlen( $needle ) ) === 0;
    }
}

// ==== AUTOMATION EVENT DEFINITIONS ====
function wats_get_events() {
    return array(
        'order_confirmation' => array(
            'label'        => 'Order Confirmation',
            'description'  => 'Sent when a WooCommerce order is placed (Thank You page).',
            'placeholders' => '{{1}} = Order ID, {{2}} = Amount',
            'sample'       => "Thank you for shopping with Admark 🙏\n\nYour order has been successfully placed.\n\n📦 Order ID: {{1}}\n💰 Amount: ₹{{2}}\n\nWe'll notify you once your order is dispatched.",
            'var_count'    => 2,
            'var_defaults' => array( 1 => 'order_id', 2 => 'order_total' ),
        ),
        'payment_confirmation' => array(
            'label'        => 'Payment Confirmation',
            'description'  => 'Sent when payment status changes to processing/completed.',
            'placeholders' => '{{1}} = Customer Name, {{2}} = Order ID',
            'sample'       => "Hi {{1}}\n\nWe have received your payment successfully for Order ID {{2}} ✅\n\nThank you for choosing Admark.\n\nYour order is now being processed.",
            'var_count'    => 2,
            'var_defaults' => array( 1 => 'customer_name', 2 => 'order_id' ),
        ),
        'order_dispatch' => array(
            'label'        => 'Order Dispatch',
            'description'  => 'Sent when order status changes to Shipped.',
            'placeholders' => '{{1}} = Customer Name, {{2}} = Order ID, {{3}} = Tracking Link',
            'sample'       => "Good news {{1}} 🎉\n\nYour Admark order has been dispatched.\n\n📦 Order ID: {{2}}\n🚚 Tracking Link: {{3}}\n\nThank you for shopping with us.",
            'var_count'    => 3,
            'var_defaults' => array( 1 => 'customer_name', 2 => 'order_id', 3 => 'tracking_link' ),
        ),
        'delivery_confirmation' => array(
            'label'        => 'Delivery Confirmation',
            'description'  => 'Sent when order status changes to Completed.',
            'placeholders' => '{{1}} = Customer Name',
            'sample'       => "Hi {{1}}\n\nYour Admark order has been delivered successfully ✅\n\nWe hope you enjoy the products.\n\nThank you for shopping with Admark 🙏",
            'var_count'    => 1,
            'var_defaults' => array( 1 => 'customer_name' ),
        ),
        'feedback_request' => array(
            'label'        => 'Feedback / Review Request',
            'description'  => 'Sent 2 days after delivery via WP-Cron.',
            'placeholders' => '{{1}} = Customer Name, {{2}} = Review Link',
            'sample'       => "Namaste {{1}}\n\nWe hope you loved your Admark purchase 😊\n\nPlease share your feedback and help us serve you better.\n\n⭐ Give Review:\n{{2}}\n\nThank you for being a valued customer.",
            'var_count'    => 2,
            'var_defaults' => array( 1 => 'customer_name', 2 => 'review_link' ),
        ),
        'reorder_reminder' => array(
            'label'        => 'Repeat Purchase / Reorder',
            'description'  => 'Sent manually or via campaign to encourage repeat orders.',
            'placeholders' => '{{1}} = Customer Name, {{2}} = Shop Link',
            'sample'       => "Hello {{1}}\n\nRunning low on your favorite Admark products?\n\n🛒 Reorder quickly here:\n{{2}}\n\nEnjoy hassle-free shopping and doorstep delivery.",
            'var_count'    => 2,
            'var_defaults' => array( 1 => 'customer_name', 2 => 'shop_url' ),
        ),
        'offer_campaign' => array(
            'label'        => 'Offer & Festival Campaign',
            'description'  => 'Promotional or festival offer messages with customer targeting and scheduling.',
            'placeholders' => '{{1}} = Shop/Offer Link',
            'sample'       => "🎉 Special Offer from Admark 🎉\n\nGet exciting deals on selected products for a limited time.\n\n🛍️ Shop Now:\n{{1}}\n\nHurry! Offer valid till stocks last.",
            'var_count'    => 1,
            'var_defaults' => array( 1 => 'shop_url' ),
        ),
        'welcome' => array(
            'label'        => 'Welcome Message',
            'description'  => 'Sent when a new customer registers on the website.',
            'placeholders' => '{{1}} = Customer Name, {{2}} = Shop Link',
            'sample'       => "Namaste {{1}} 👋\n\nWelcome to Admark Online Shopping.\n\nExplore authentic Admark products, exclusive offers, and easy doorstep delivery.\n\n🛒 Shop Now: {{2}}\n\nIf you need any help regarding products or orders, feel free to reply to this message.",
            'var_count'    => 2,
            'var_defaults' => array( 1 => 'customer_name', 2 => 'shop_url' ),
        ),
        'add_to_cart' => array(
            'label'        => 'Add to Cart Reminder',
            'description'  => 'Sent ~20 minutes after a product is added to the cart (logged-in users).',
            'placeholders' => '{{1}} = Customer Name, {{2}} = Cart Link',
            'sample'       => "Hi {{1}} 😊\n\nYou've added products to your cart on Admark Shopping.\n\n🛍️ Your selected items are waiting for you.\n\nComplete your order here:\n{{2}}\n\nOrder now before stock runs out.",
            'var_count'    => 2,
            'var_defaults' => array( 1 => 'customer_name', 2 => 'cart_url' ),
        ),
        'abandoned_cart' => array(
            'label'        => 'Abandoned Cart',
            'description'  => 'Sent 3 hours after cart is abandoned without purchase.',
            'placeholders' => '{{1}} = Customer Name, {{2}} = Cart/Resume Link',
            'sample'       => "Hello {{1}}\n\nLooks like you left some items in your Admark cart 🛒\n\nComplete your purchase now and get your favorite products delivered to your doorstep.\n\n👉 Resume Order:\n{{2}}\n\nNeed any assistance? Simply reply to this message.",
            'var_count'    => 2,
            'var_defaults' => array( 1 => 'customer_name', 2 => 'cart_url' ),
        ),
        'payment_failed' => array(
            'label'        => 'Payment Failed',
            'description'  => 'Sent when payment status changes to Failed.',
            'placeholders' => '{{1}} = Customer Name, {{2}} = Order ID',
            'sample'       => "Hi {{1}}\n\nWe were unable to process your payment for Order ID {{2}} ❌\n\nPlease try again or contact us for assistance.\n\nNeed help? Reply to this message.",
            'var_count'    => 2,
            'var_defaults' => array( 1 => 'customer_name', 2 => 'order_id' ),
        ),
        'refund' => array(
            'label'        => 'Refund',
            'description'  => 'Sent when order is refunded.',
            'placeholders' => '{{1}} = Customer Name, {{2}} = Order ID, {{3}} = Refund Amount',
            'sample'       => "Hi {{1}}\n\nYour refund for Order ID {{2}} has been processed ✅\n\nRefund Amount: ₹{{3}}\n\nYour money has been returned to your original payment method.\n\nThank you for shopping with Admark.",
            'var_count'    => 3,
            'var_defaults' => array( 1 => 'customer_name', 2 => 'order_id', 3 => 'order_total' ),
        ),
    );
}

// Option getters
function wats_get_api_key() { return trim((string)get_option('wats_api_key', '')); }
function wats_get_phone_number_id() { return trim((string)get_option('wats_phone_number_id', '')); }
function wats_get_selected_template() { return trim((string)get_option('wats_selected_template', '')); }
function wats_get_event_template( $event ) { return trim((string)get_option('wats_tpl_' . $event, '')); }
function wats_get_event_enabled( $event ) { return (bool)get_option('wats_enable_' . $event, 0); }

function wats_get_event_delay( $event ) {
    $defaults = array(
        'welcome'        => array( 'value' => 0,  'unit' => 'minutes' ),
        'add_to_cart'    => array( 'value' => 20, 'unit' => 'minutes' ),
        'abandoned_cart' => array( 'value' => 3,  'unit' => 'hours' ),
        'feedback_request' => array( 'value' => 2, 'unit' => 'days' ),
    );
    $def  = isset( $defaults[ $event ] ) ? $defaults[ $event ] : array( 'value' => 0, 'unit' => 'minutes' );
    $val  = (int) get_option( 'wats_delay_val_'  . $event, $def['value'] );
    $unit = sanitize_key( (string) get_option( 'wats_delay_unit_' . $event, $def['unit'] ) );
    switch ( $unit ) {
        case 'hours': return $val * HOUR_IN_SECONDS;
        case 'days':  return $val * DAY_IN_SECONDS;
        default:      return $val * MINUTE_IN_SECONDS;
    }
}

// ==== VARIABLE MAPPING HELPERS ====
function wats_get_variable_options() {
    return array(
        'customer_name'   => 'Customer Name',
        'phone'           => 'Mobile Number',
        'email'           => 'Email',
        'billing_address' => 'Billing Address',
        'order_id'        => 'Order ID',
        'order_total'     => 'Order Amount',
        'product_names'   => 'Product Name(s)',
        'product_qty'     => 'Product Quantity',
        'tracking_link'   => 'Tracking Link',
        'shop_url'        => 'Shop URL',
        'cart_url'        => 'Cart URL',
        'review_link'     => 'Review Link',
    );
}

function wats_get_var_map( $event, $slot ) {
    $saved = trim( (string) get_option( 'wats_varmap_' . $event . '_' . $slot, '' ) );
    if ( $saved !== '' ) { return $saved; }
    $events = wats_get_events();
    return isset( $events[ $event ]['var_defaults'][ $slot ] ) ? $events[ $event ]['var_defaults'][ $slot ] : '';
}

function wats_resolve_var( $key, $order = null, $user = null ) {
    switch ( $key ) {
        case 'customer_name':
            if ( $order ) { return trim( $order->get_billing_first_name() . ' ' . $order->get_billing_last_name() ); }
            if ( $user )  { return trim( $user->first_name . ' ' . $user->last_name ) ?: $user->display_name; }
            return '';
        case 'phone':
            if ( $order ) { return $order->get_billing_phone(); }
            if ( $user )  { return (string) get_user_meta( $user->ID, 'billing_phone', true ); }
            return '';
        case 'email':
            if ( $order ) { return $order->get_billing_email(); }
            if ( $user )  { return $user->user_email; }
            return '';
        case 'billing_address':
            if ( $order ) { return wp_strip_all_tags( $order->get_formatted_billing_address() ); }
            return '';
        case 'order_id':
            if ( $order ) { return (string) $order->get_id(); }
            return '';
        case 'order_total':
            if ( $order ) { return html_entity_decode( wp_strip_all_tags( $order->get_formatted_order_total() ) ); }
            return '';
        case 'product_names':
            if ( $order ) {
                $names = array();
                foreach ( $order->get_items() as $item ) { $names[] = $item->get_name(); }
                return implode( ', ', $names );
            }
            return '';
        case 'product_qty':
            if ( $order ) {
                $qtys = array();
                foreach ( $order->get_items() as $item ) { $qtys[] = (string) $item->get_quantity(); }
                return implode( ', ', $qtys );
            }
            return '';
        case 'tracking_link':
            if ( $order ) {
                $link = (string) $order->get_meta( '_wats_tracking_link' );
                return $link !== '' ? $link : home_url();
            }
            return home_url();
        case 'shop_url':
            return function_exists( 'wc_get_page_id' ) ? ( get_permalink( wc_get_page_id( 'shop' ) ) ?: home_url( '/shop/' ) ) : home_url( '/shop/' );
        case 'cart_url':
            return function_exists( 'wc_get_cart_url' ) ? wc_get_cart_url() : home_url( '/cart/' );
        case 'review_link':
            if ( $order ) { return get_permalink( $order->get_id() ) ?: home_url(); }
            return home_url();
        default:
            return '';
    }
}

// ==== SANITIZERS ====
function wats_sanitize_api_key( $value ) { return sanitize_text_field( (string) $value ); }
function wats_sanitize_phone_number_id( $value ) { return preg_replace( '/\D+/', '', sanitize_text_field( (string) $value ) ); }
function wats_sanitize_selected_template( $value ) {
    $val = sanitize_text_field( (string) $value );
    if ( $val === '' ) { return ''; }
    $templates = get_transient( 'wats_templates_cache' ) ?: wats_fetch_templates();
    return is_array( $templates ) && in_array( $val, $templates, true ) ? $val : '';
}
function wats_sanitize_send_count( $value ) { return absint( $value ); }
function wats_sanitize_send_log( $value ) {
    if ( ! is_array( $value ) ) { return array(); }
    $out = array();
    foreach ( $value as $entry ) {
        if ( is_array( $entry ) && isset($entry['utc']) ) {
            $out[] = array(
                'local' => sanitize_text_field($entry['local'] ?? ''),
                'utc'   => (int)$entry['utc'],
                'event' => sanitize_text_field($entry['event'] ?? 'campaign'),
                'recipient' => sanitize_text_field($entry['recipient'] ?? 'Unknown'),
                'template' => sanitize_text_field($entry['template'] ?? '—')
            );
        }
    }
    return count( $out ) > 5000 ? array_slice( $out, -5000 ) : $out;
}

function wats_normalize_phone( $raw ) {
    $digits = preg_replace( '/\D+/', '', (string) $raw );
    if ( strlen( $digits ) === 11 && wats_str_starts_with( $digits, '0' ) ) { $digits = substr( $digits, 1 ); }
    if ( wats_str_starts_with( $digits, '91' ) && strlen( $digits ) === 12 ) { return $digits; }
    return strlen( $digits ) === 10 ? '91' . $digits : $digits;
}

function wats_build_csv_for_event( $event, $order = null, $user = null ) {
    $var_count = (int) get_option( 'wats_varcount_' . $event, 0 );
    if ( $var_count <= 0 ) {
        $events = wats_get_events();
        $var_count = isset( $events[ $event ]['var_count'] ) ? (int) $events[ $event ]['var_count'] : 2;
    }
    $vars = array();
    for ( $i = 1; $i <= $var_count; $i++ ) {
        $map_key = wats_get_var_map( $event, $i );
        $vars[]  = $map_key !== '' ? wats_resolve_var( $map_key, $order, $user ) : '';
    }
    return implode( ',', array_map( 'rawurlencode', $vars ) );
}

function wats_build_url( $args ) {
    $params = array(
        'api-key'       => wats_get_api_key(),
        'templateName'  => $args['templateName'] ?? '',
        'phoneNumber'   => $args['phoneNumber'] ?? '',
        'phoneNumberId' => wats_get_phone_number_id(),
        'csvVariables'  => $args['csvVariables'] ?? '',
    );
    return add_query_arg( array_filter( $params ), WATS_API_BASE );
}

function wats_send_template( $order, $event = 'order_confirmation' ) {
    try {
        if ( ! class_exists( 'WC_Order' ) || ! ( $order instanceof WC_Order ) ) { return; }
        $template = wats_get_event_template( $event );
        if ( $template === '' && $event === 'order_confirmation' ) { $template = wats_get_selected_template(); }
        if ( empty( $template ) ) { return; }

        $raw_phone = $order->get_billing_phone();
        if ( empty( $raw_phone ) ) { return; }

        $phone = wats_normalize_phone( $raw_phone );
        $csv   = wats_build_csv_for_event( $event, $order );

        $response = wp_remote_get( wats_build_url( array( 'templateName' => $template, 'phoneNumber' => $phone, 'csvVariables' => $csv ) ), array( 'timeout' => 15 ) );
        if ( ! is_wp_error( $response ) && wp_remote_retrieve_response_code( $response ) == 200 ) {
            $count = (int) get_option( 'wats_send_count', 0 );
            update_option( 'wats_send_count', $count + 1, false );
            $log = get_option( 'wats_send_log', array() );
            $log[] = array(
                'local' => current_time( 'mysql' ),
                'utc' => time(),
                'event' => $event,
                'recipient' => $phone,
                'template' => $template
            );
            update_option( 'wats_send_log', $log, false );
        }
    } catch ( Throwable $e ) {}
}

// ==== AUTOMATION EVENTS HOOKS ====
add_action( 'woocommerce_thankyou', function( $order_id ) {
    if ( ! $order_id || ! wats_get_event_enabled( 'order_confirmation' ) ) { return; }
    $order = wc_get_order( $order_id );
    if ( $order && ! $order->get_meta( '_wats_order_confirmation_sent' ) ) {
        wats_send_template( $order, 'order_confirmation' );
        $order->update_meta_data( '_wats_order_confirmation_sent', current_time( 'mysql' ) );
        $order->save();
    }
}, 20, 1 );

add_action( 'woocommerce_order_status_processing', function( $order_id ) {
    if ( ! wats_get_event_enabled( 'payment_confirmation' ) ) { return; }
    $order = wc_get_order( $order_id );
    if ( $order && ! $order->get_meta( '_wats_payment_confirmation_sent' ) ) {
        wats_send_template( $order, 'payment_confirmation' );
        $order->update_meta_data( '_wats_payment_confirmation_sent', current_time( 'mysql' ) );
        $order->save();
    }
}, 10, 1 );

add_action( 'woocommerce_order_status_shipped', 'wats_handle_order_dispatch', 10, 1 );
add_action( 'woocommerce_order_status_completed', 'wats_handle_order_dispatch', 5, 1 );
function wats_handle_order_dispatch( $order_id ) {
    if ( ! wats_get_event_enabled( 'order_dispatch' ) ) { return; }
    $order = wc_get_order( $order_id );
    if ( $order && ! $order->get_meta( '_wats_dispatch_sent' ) ) {
        wats_send_template( $order, 'order_dispatch' );
        $order->update_meta_data( '_wats_dispatch_sent', current_time( 'mysql' ) );
        $order->save();
    }
}

add_action( 'woocommerce_order_status_completed', function( $order_id ) {
    if ( ! wats_get_event_enabled( 'delivery_confirmation' ) ) { return; }
    $order = wc_get_order( $order_id );
    if ( $order && ! $order->get_meta( '_wats_delivery_sent' ) ) {
        wats_send_template( $order, 'delivery_confirmation' );
        $order->update_meta_data( '_wats_delivery_sent', current_time( 'mysql' ) );
        $order->save();
    }
}, 10, 1 );

add_action( 'woocommerce_order_status_completed', function( $order_id ) {
    if ( ! wats_get_event_enabled( 'feedback_request' ) ) { return; }
    if ( ! wp_next_scheduled( 'wats_send_feedback', array( $order_id ) ) ) {
        wp_schedule_single_event( time() + wats_get_event_delay('feedback_request'), 'wats_send_feedback', array( $order_id ) );
    }
}, 20, 1 );

add_action( 'wats_send_feedback', function( $order_id ) {
    $order = wc_get_order( $order_id );
    if ( $order && ! $order->get_meta( '_wats_feedback_sent' ) ) {
        wats_send_template( $order, 'feedback_request' );
        $order->update_meta_data( '_wats_feedback_sent', current_time( 'mysql' ) );
        $order->save();
    }
}, 10, 1 );

add_action( 'woocommerce_order_status_failed', function( $order_id ) {
    if ( ! wats_get_event_enabled( 'payment_failed' ) ) { return; }
    $order = wc_get_order( $order_id );
    if ( $order && ! $order->get_meta( '_wats_payment_failed_sent' ) ) {
        wats_send_template( $order, 'payment_failed' );
        $order->update_meta_data( '_wats_payment_failed_sent', current_time( 'mysql' ) );
        $order->save();
    }
}, 10, 1 );

add_action( 'woocommerce_order_refunded', function( $order_id, $refund_id ) {
    if ( ! wats_get_event_enabled( 'refund' ) ) { return; }
    $order = wc_get_order( $order_id );
    if ( $order && ! $order->get_meta( '_wats_refund_sent_' . $refund_id ) ) {
        wats_send_template( $order, 'refund' );
        $order->update_meta_data( '_wats_refund_sent_' . $refund_id, current_time( 'mysql' ) );
        $order->save();
    }
}, 10, 2 );

// ==== TIMED SYSTEM ARGS CONTROLS ====
add_action( 'user_register', function( $user_id ) {
    if ( ! wats_get_event_enabled( 'welcome' ) ) { return; }
    $template = wats_get_event_template( 'welcome' ); if ( empty($template) ) { return; }
    $delay = wats_get_event_delay( 'welcome' );
    if ( $delay > 0 ) {
        wp_schedule_single_event( time() + $delay, 'wats_send_welcome', array( $user_id ) );
    } else {
        $user = get_userdata( $user_id ); $phone = get_user_meta( $user_id, 'billing_phone', true );
        if ( ! empty($phone) ) { wp_remote_get( wats_build_url( array( 'templateName' => $template, 'phoneNumber' => wats_normalize_phone( $phone ), 'csvVariables' => wats_build_csv_for_event( 'welcome', null, $user ) ) ), array( 'timeout' => 15 ) ); }
    }
}, 10, 1 );

add_action( 'wats_send_welcome', function( $user_id ) {
    $template = wats_get_event_template( 'welcome' ); if ( empty($template) ) { return; }
    $user = get_userdata( $user_id ); $phone = get_user_meta( $user_id, 'billing_phone', true );
    if ( ! empty($phone) ) { wp_remote_get( wats_build_url( array( 'templateName' => $template, 'phoneNumber' => wats_normalize_phone( $phone ), 'csvVariables' => wats_build_csv_for_event( 'welcome', null, $user ) ) ), array( 'timeout' => 15 ) ); }
}, 10, 1 );

add_action( 'woocommerce_add_to_cart', function() {
    if ( ! wats_get_event_enabled( 'add_to_cart' ) ) { return; }
    $user_id = get_current_user_id(); if ( ! $user_id ) { return; }
    $args = array( $user_id );
    $existing = wp_next_scheduled( 'wats_send_cart_reminder', $args );
    if ( $existing ) { wp_unschedule_event( $existing, 'wats_send_cart_reminder', $args ); }
    wp_schedule_single_event( time() + max( 60, wats_get_event_delay( 'add_to_cart' ) ), 'wats_send_cart_reminder', $args );
}, 10, 0 );

add_action( 'wats_send_cart_reminder', function( $user_id ) {
    $template = wats_get_event_template( 'add_to_cart' ); if ( empty($template) ) { return; }
    $user = get_userdata( $user_id ); $phone = get_user_meta( $user_id, 'billing_phone', true );
    if ( ! empty($phone) ) { wp_remote_get( wats_build_url( array( 'templateName' => $template, 'phoneNumber' => wats_normalize_phone( $phone ), 'csvVariables' => wats_build_csv_for_event( 'add_to_cart', null, $user ) ) ), array( 'timeout' => 15 ) ); }
}, 10, 1 );

// ==== TEMPLATE CACHE ENGINE ====
add_action( 'wp_ajax_wats_get_template_vars', function() {
    check_ajax_referer( 'wats_ajax_nonce', 'nonce' );
    $template_name = sanitize_text_field( $_GET['template'] ?? '' );
    $api_key = wats_get_api_key();
    $url = add_query_arg( array( 'name' => $template_name, 'api-key' => $api_key ), 'https://verifiedwhatsapp.admarksolution.com/template-byname' );
    $response = wp_remote_get( $url, array( 'timeout' => 15 ) );
    if ( is_wp_error( $response ) ) { wp_send_json_error(); }
    $data = json_decode( wp_remote_retrieve_body( $response ), true );
    $var_count = 0;
    if ( isset( $data['components'] ) ) {
        foreach ( $data['components'] as $comp ) {
            if ( strtoupper( $comp['type'] ?? '' ) === 'BODY' && isset( $comp['text'] ) ) {
                if ( preg_match_all( '/\{\{(\d+)\}\}/', $comp['text'], $m ) ) { $var_count = max( array_map( 'intval', $m[1] ) ); }
            }
        }
    }
    wp_send_json_success( array( 'var_count' => $var_count ) );
} );

add_action( 'wp_ajax_wats_get_campaign_customers', function() {
    check_ajax_referer( 'wats_ajax_nonce', 'nonce' );
    $paged = isset( $_POST['page'] ) ? absint( $_POST['page'] ) : 1;
    $search = isset( $_POST['search'] ) ? sanitize_text_field( $_POST['search'] ) : '';
    $number = 100;
    $args = array( 'number' => $number, 'offset' => ($paged - 1) * $number, 'fields' => array( 'ID', 'user_email', 'display_name' ) );
    if ( ! empty( $search ) ) { $args['search'] = '*' . $search . '*'; }
    $user_query = new WP_User_Query( $args );
    $customers = $user_query->get_results();
    $list = array();
    foreach ( $customers as $user ) {
        $phone = get_user_meta( $user->ID, 'billing_phone', true );
        $list[] = array(
            'id' => $user->ID,
            'name' => $user->display_name ?: 'No Name',
            'email' => $user->user_email,
            'phone' => ! empty( $phone ) ? $phone : '⚠️ No Phone Registered',
            'no_phone' => empty( $phone )
        );
    }
    wp_send_json_success( array( 'customers' => $list, 'total_users' => $user_query->get_total(), 'page' => $paged, 'total_pages' => ceil( $user_query->get_total() / $number ) ) );
} );

// ==== LEFT BAR MENU SUB-LEVEL MANAGEMENT ====
add_action( 'admin_menu', function () {
    add_menu_page( 'Admark CRM', 'Admark CRM', 'manage_options', 'wats-settings', 'wats_render_settings_page', 'dashicons-whatsapp', 56 );
    add_submenu_page( 'wats-settings', 'Settings', 'Settings', 'manage_options', 'wats-settings', 'wats_render_settings_page' );
    add_submenu_page( 'wats-settings', 'Automation', 'Automation', 'manage_options', 'wats-automation', 'wats_render_automation_page' );
    add_submenu_page( 'wats-settings', 'Message Templates', 'Message Templates', 'manage_options', 'wats-message-templates', 'wats_render_message_templates_page' );
    add_submenu_page( 'wats-settings', 'Message Logs', 'Message Logs', 'manage_options', 'wats-message-logs', 'wats_render_message_logs_page' );
} );

add_action( 'admin_init', function () {
    register_setting( 'wats_settings_group', 'wats_api_key', array( 'sanitize_callback' => 'wats_sanitize_api_key' ) );
    register_setting( 'wats_settings_group', 'wats_phone_number_id', array( 'sanitize_callback' => 'wats_sanitize_phone_number_id' ) );
    register_setting( 'wats_settings_group', 'wats_selected_template', array( 'sanitize_callback' => 'wats_sanitize_selected_template' ) );
    register_setting( 'wats_settings_group', 'wats_send_count', array( 'sanitize_callback' => 'wats_sanitize_send_count' ) );
    register_setting( 'wats_settings_group', 'wats_send_log', array( 'sanitize_callback' => 'wats_sanitize_send_log' ) );
    foreach ( array_keys( wats_get_events() ) as $event ) {
        register_setting( 'wats_automation_group', 'wats_enable_' . $event, array( 'sanitize_callback' => 'absint' ) );
        register_setting( 'wats_automation_group', 'wats_tpl_' . $event, array( 'sanitize_callback' => 'sanitize_text_field' ) );
        register_setting( 'wats_automation_group', 'wats_varcount_' . $event, array( 'sanitize_callback' => 'absint' ) );
        register_setting( 'wats_automation_group', 'wats_delay_val_' . $event, array( 'sanitize_callback' => 'absint' ) );
        register_setting( 'wats_automation_group', 'wats_delay_unit_' . $event, array( 'sanitize_callback' => 'sanitize_key' ) );
    }
} );

add_action( 'admin_enqueue_scripts', function( $hook_suffix ) {
    $pages = array( 'toplevel_page_wats-settings', 'admark-crm_page_wats-automation', 'admark-crm_page_wats-message-templates', 'admark-crm_page_wats-message-logs' );
    if ( ! in_array( $hook_suffix, $pages, true ) ) { return; }
    wp_enqueue_style( 'admark-crm-admin', plugins_url( 'assets/admin.css', __FILE__ ), array(), '3.2.8' );
    wp_enqueue_script( 'admark-crm-admin', plugins_url( 'assets/admin.js', __FILE__ ), array('jquery'), '3.2.8', true );
    
    $events = wats_get_events();
    $saved_maps_js = array();
    foreach ( $events as $ek => $ev ) {
        $saved_maps_js[ $ek ] = array();
        for ( $i = 1; $i <= 10; $i++ ) { $saved_maps_js[ $ek ][ $i ] = wats_get_var_map( $ek, $i ); }
    }

    wp_localize_script( 'admark-crm-admin', 'wats_setup_vars', array( 
        'ajax_url' => admin_url( 'admin-ajax.php' ), 
        'nonce' => wp_create_nonce( 'wats_ajax_nonce' ),
        'tpl_var_counts' => wats_get_template_var_counts(),
        'field_options' => wats_get_variable_options(),
        'saved_maps' => $saved_maps_js
    ) );
} );

function wats_render_nav( $active ) {
    $tabs = array( 
        'wats-settings' => 'Settings', 
        'wats-automation' => 'Automation', 
        'wats-message-templates' => 'Message Templates',
        'wats-message-logs' => 'Message Logs' 
    );
    echo '<nav class="wats-nav">';
    foreach ( $tabs as $page => $label ) {
        $class = ( $active === $page ) ? 'wats-nav-tab wats-nav-tab-active' : 'wats-nav-tab';
        echo '<a href="' . esc_url( admin_url( 'admin.php?page=' . $page ) ) . '" class="' . esc_attr( $class ) . '">' . esc_html( $label ) . '</a>';
    }
    echo '</nav>';
}

function wats_render_settings_page() {
    $selected = wats_get_selected_template();
    $total_sent = (int) get_option( 'wats_send_count', 0 );
    $today_iso  = current_time( 'Y-m-d' );
    ?>
    <div class="wrap wats-wrap">
        <div class="wats-header"><span class="dashicons dashicons-whatsapp wats-header-icon"></span><h1>Admark CRM</h1><span class="wats-version">v3.2.8</span></div>
        <?php wats_render_nav( 'wats-settings' ); ?>
        
        <div class="wats-stats-bar">
            <div class="wats-stat-card"><span class="wats-stat-label">Total Messages Sent</span><span class="wats-stat-value"><?php echo esc_html($total_sent); ?></span></div>
            <div class="wats-stat-card"><span class="wats-stat-label">Active Default Template</span><span class="wats-stat-value wats-stat-small"><?php echo $selected !== '' ? esc_html( $selected ) : '—'; ?></span></div>
            <div class="wats-stat-card wats-stat-range">
                <span class="wats-stat-label">Messages in Range</span>
                <form id="wats-inline-range" method="post" class="wats-range-form">
                    <input type="date" id="wats_from" name="wats_from" max="<?php echo esc_attr( $today_iso ); ?>" value="<?php echo esc_attr( $today_iso ); ?>">
                    <span class="wats-range-sep">→</span>
                    <input type="date" id="wats_to" name="wats_to" max="<?php echo esc_attr( $today_iso ); ?>" value="<?php echo esc_attr( $today_iso ); ?>">
                    <strong id="wats_range_count" class="wats-range-count">0</strong>
                </form>
            </div>
        </div>

        <form method="post" action="options.php">
            <?php settings_fields( 'wats_settings_group' ); ?>
            <div class="wats-card">
                <h2 class="wats-card-title">API Configuration</h2>
                <table class="form-table">
                    <tr><th>API Key</th><td><input name="wats_api_key" type="text" class="regular-text" value="<?php echo esc_attr( wats_get_api_key() ); ?>"></td></tr>
                    <tr><th>Phone ID</th><td><input name="wats_phone_number_id" type="text" class="regular-text" value="<?php echo esc_attr( wats_get_phone_number_id() ); ?>"></td></tr>
                </table>
                <?php submit_button('Save Changes', 'primary wats-btn-primary'); ?>
            </div>
        </form>

        <div class="wats-card">
            <h2 class="wats-card-title">Template Cache</h2>
            <form method="post">
                <?php
                if ( isset( $_POST['wats_refresh_templates'] ) && check_admin_referer( 'wats_refresh_templates_action' ) ) {
                    delete_transient( 'wats_templates_cache' ); delete_transient( 'wats_template_vars_cache' );
                    wats_fetch_templates();
                    echo '<div class="notice notice-success inline"><p>Templates cache cleared and reloaded.</p></div>';
                }
                wp_nonce_field( 'wats_refresh_templates_action' );
                ?>
                <input type="hidden" name="wats_refresh_templates" value="1">
                <?php submit_button( 'Refresh Templates', 'secondary', 'submit', false ); ?>
            </form>
        </div>
    </div>
    <?php
}

function wats_render_automation_page() {
    $templates = get_transient( 'wats_templates_cache' ) ?: wats_fetch_templates();
    $events = wats_get_events();
    unset($events['offer_campaign']);

    $delay_events = array(
        'welcome'          => 'Welcome Send Delay',
        'add_to_cart'      => 'Cart Reminder Timer',
        'abandoned_cart'   => 'Abandoned Delay',
        'feedback_request' => 'Feedback Delay'
    );
    ?>
    <div class="wrap wats-wrap">
        <div class="wats-header"><span class="dashicons dashicons-whatsapp wats-header-icon"></span><h1>Admark CRM</h1><span class="wats-version">v3.2.8</span></div>
        <?php wats_render_nav( 'wats-automation' ); ?>

        <div class="wats-card wats-campaign-card" style="border-left: 4px solid #25D366; background: #ffffff;">
            <div style="display:flex; align-items:center; gap:10px; margin-bottom:15px;"><span class="dashicons dashicons-megaphone" style="font-size:24px; color:#25D366;"></span><h2 style="margin:0; font-size:18px;">Offer & Festival Campaign Hub</h2></div>
            <p style="color:#666; margin-bottom:20px;">Load your entire customer list, select a template profile, map your custom variables, and broadcast messages instantly or schedule them for later.</p>
            <table class="form-table">
                <tr><th>1. Target Customers</th><td><button type="button" class="button" id="wats_select_customers">👥 Fetch & Select Customers</button><input type="hidden" id="wats_campaign_customers" value=""><span id="wats_selected_cust_count" style="margin-left:12px; font-weight:600; color:#25D366;">0 Customers Selected</span></td></tr>
                <tr><th>2. Campaign Template</th><td><select id="wats_campaign_template" class="wats-tpl-select" data-event-key="offer_campaign"><option value="">— Select Template —</option><?php foreach($templates as $t){ echo '<option value="'.esc_attr($t).'">'.esc_html($t).'</option>'; } ?></select><input type="hidden" class="wats-varcount-input" id="wats_campaign_varcount" value="0"><div class="wats-var-map-container" id="wats_campaign_vars_container"></div></td></tr>
                <tr><th>3. Scheduling (Optional)</th><td><input type="datetime-local" id="wats_campaign_schedule" class="wats-schedule-input"><p class="description">Leave this field blank to broadcast across the system immediately.</p></td></tr>
            </table>
            <button type="button" class="button button-primary wats-btn-primary" id="wats_trigger_campaign" style="margin-top:10px;">🚀 Bulk Message Broadcast</button>
        </div>

        <div class="wats-card wats-flow-diagram">
            <h2 class="wats-card-title">Automation Flow</h2>
            <div class="wats-flow">
                <div class="wats-flow-step">🌐 Visit</div><div class="wats-flow-arrow">→</div>
                <div class="wats-flow-step">🛒 Cart</div><div class="wats-flow-arrow">→</div>
                <div class="wats-flow-step">⏰ Abandoned</div><div class="wats-flow-arrow">→</div>
                <div class="wats-flow-step">✅ Order</div><div class="wats-flow-arrow">→</div>
                <div class="wats-flow-step">💳 Payment</div><div class="wats-flow-arrow">→</div>
                <div class="wats-flow-step">🚚 Dispatch</div><div class="wats-flow-arrow">→</div>
                <div class="wats-flow-step">📦 Delivered</div><div class="wats-flow-arrow">→</div>
                <div class="wats-flow-step">⭐ Feedback</div>
            </div>
        </div>

        <form method="post" action="options.php">
            <?php settings_fields( 'wats_automation_group' ); ?>
            <?php foreach ( $events as $ek => $ev ) : 
                $enabled = wats_get_event_enabled($ek); $cur_tpl = wats_get_event_template($ek); ?>
                <div class="wats-card wats-automation-card <?php echo $enabled ? 'wats-event-enabled' : ''; ?>" data-event-key="<?php echo esc_attr($ek); ?>">
                    <div class="wats-automation-header" style="display:flex; align-items:center; width:100%;">
                        <label class="wats-toggle"><input type="checkbox" name="wats_enable_<?php echo esc_attr($ek); ?>" value="1" <?php checked($enabled); ?>><span class="wats-toggle-slider"></span></label>
                        <div style="margin-left:15px; flex-grow:1;"><h3><?php echo esc_html($ev['label']); ?></h3><p style="margin:2px 0 0; color:#666; font-size:13px;"><?php echo esc_html($ev['description']); ?></p></div>
                        
                        <?php if ( isset( $delay_events[ $ek ] ) ) : 
                            $del_val  = (int) get_option( 'wats_delay_val_'  . $ek, 0 );
                            $del_unit = (string) get_option( 'wats_delay_unit_' . $ek, 'minutes' );
                        ?>
                        <div class="wats-delay-control-block" style="text-align:right; min-width:180px;">
                            <span style="font-size:11px; font-weight:600; text-transform:uppercase; color:#888; display:block; margin-bottom:4px;"><?php echo esc_html($delay_events[$ek]); ?></span>
                            <input type="number" name="wats_delay_val_<?php echo esc_attr($ek); ?>" value="<?php echo esc_attr($del_val); ?>" min="0" style="width:60px; padding:4px; text-align:center; border:1px solid #ccc; border-radius:4px;">
                            <select name="wats_delay_unit_<?php echo esc_attr($ek); ?>" style="padding:4px; border:1px solid #ccc; border-radius:4px;">
                                <option value="minutes" <?php selected( $del_unit, 'minutes' ); ?>>Min</option>
                                <option value="hours"   <?php selected( $del_unit, 'hours' ); ?>>Hours</option>
                                <option value="days"    <?php selected( $del_unit, 'days' ); ?>>Days</option>
                            </select>
                        </div>
                        <?php endif; ?>
                    </div>
                    <div class="wats-automation-body" style="margin-top:15px; padding-left:60px;">
                        <select name="wats_tpl_<?php echo esc_attr($ek); ?>" class="wats-tpl-select" data-event-key="<?php echo esc_attr($ek); ?>"><option value="">— Select template —</option><?php foreach($templates as $t){ $s=($t==$cur_tpl)?'selected':''; echo '<option value="'.esc_attr($t).'" '.$s.'>'.esc_html($t).'</option>'; } ?></select>
                        <input type="hidden" name="wats_varcount_<?php echo esc_attr($ek); ?>" class="wats-varcount-input" value="<?php echo esc_attr((int)get_option('wats_varcount_'.$ek, $ev['var_count'])); ?>">
                        <div class="wats-var-map-container"></div>
                    </div>
                </div>
            <?php endforeach; ?>
            <?php submit_button('Save Automation Settings', 'primary wats-btn-primary'); ?>
        </form>
    </div>

    <div id="wats_customer_modal" class="wats-modal" style="display:none; position:fixed; z-index:999999 !important; left:0; top:0; width:100%; height:100%; background:rgba(0,0,0,0.6); overflow:auto;">
        <div class="wats-modal-content" style="background:#fff; margin:8% auto; padding:22px; border:1px solid #ccc; width:90%; max-width:650px; border-radius:10px; box-shadow:0 4px 20px rgba(0,0,0,0.3);">
            <div class="wats-modal-header" style="display:flex; justify-content:space-between; align-items:center; border-bottom:1px solid #ddd; padding-bottom:8px; margin-bottom:15px;"><h3 style="margin:0; font-size:16px;">Customer Selection List (Target Group Database)</h3><span class="wats-modal-close" style="font-size:28px; font-weight:bold; cursor:pointer; color:#aaa;">&times;</span></div>
            <div class="wats-modal-body" style="min-height:150px;"></div>
        </div>
    </div>
    <?php
}

// ==== 4TH TAB: MESSAGE DISPATCH HISTORY LOGS ====
function wats_render_message_logs_page() {
    $logs = array_reverse((array)get_option('wats_send_log', array()));
    ?>
    <div class="wrap wats-wrap">
        <div class="wats-header"><span class="dashicons dashicons-whatsapp wats-header-icon"></span><h1>Admark CRM</h1><span class="wats-version">v3.2.8</span></div>
        <?php wats_render_nav( 'wats-message-logs' ); ?>
        
        <div class="wats-card">
            <h2 class="wats-card-title">Message Dispatch Logs (History)</h2>
            <p class="description">Below is the historical execution flow of messages transmitted via the Admark API wrapper layer.</p>
            
            <table class="wp-list-table widefat fixed striped posts" style="margin-top:15px;">
                <thead>
                    <tr>
                        <th style="font-weight:bold; padding:10px;">Timestamp (Local)</th>
                        <th style="font-weight:bold; padding:10px;">Trigger Event</th>
                        <th style="font-weight:bold; padding:10px;">Recipient Mobile</th>
                        <th style="font-weight:bold; padding:10px;">Template Executed</th>
                    </tr>
                </thead>
                <tbody>
                    <?php if ( empty($logs) ) : ?>
                        <tr><td colspan="4" style="text-align:center; padding:20px; color:#999;">No delivery history logs stored in options registry.</td></tr>
                    <?php else : ?>
                        <?php foreach ( $logs as $log ) : ?>
                            <tr>
                                <td style="padding:10px;"><?php echo esc_html($log['local'] ?? '—'); ?></td>
                                <td style="padding:10px;"><span class="badge" style="background:#e4f5eb; color:#155724; padding:3px 8px; border-radius:4px; font-size:11px; font-weight:600; text-transform:uppercase;"><?php echo esc_html(str_replace('_', ' ', $log['event'] ?? 'campaign')); ?></span></td>
                                <td style="padding:10px;"><code><?php echo esc_html($log['recipient'] ?? '—'); ?></code></td>
                                <td style="padding:10px;"><strong><?php echo esc_html($log['template'] ?? '—'); ?></strong></td>
                            </tr>
                        <?php endforeach; ?>
                    <?php endif; ?>
                </tbody>
            </table>
        </div>
    </div>
    <?php
}

// ==== BULK WHATSAPP DISPATCH HANDLER ====
add_action( 'wp_ajax_wats_send_campaign_bulk', function() {
    check_ajax_referer( 'wats_ajax_nonce', 'nonce' );
    if ( ! current_user_can( 'manage_options' ) ) { wp_send_json_error( 'Unauthorized', 403 ); }

    $template      = isset( $_POST['template'] ) ? sanitize_text_field( $_POST['template'] ) : '';
    $customers_raw = isset( $_POST['customers'] ) ? sanitize_text_field( $_POST['customers'] ) : '';
    $schedule      = isset( $_POST['schedule'] ) ? sanitize_text_field( $_POST['schedule'] ) : '';
    $varmaps       = isset( $_POST['varmaps'] ) ? json_decode( wp_unslash( $_POST['varmaps'] ), true ) : array();

    if ( empty( $template ) || empty( $customers_raw ) ) { wp_send_json_error( 'Please select both target customers and template.' ); }

    $id_array = array();
    if ( $customers_raw === 'all_market_users' ) {
        $all_users = get_users( array( 'fields' => array( 'ID' ), 'number' => 15000 ) );
        foreach ( $all_users as $u ) { $id_array[] = $u->ID; }
    } else {
        $id_array = explode( ',', $customers_raw );
    }

    $now = current_time( 'mysql' );
    if ( ! empty( $schedule ) && $schedule > $now ) {
        $campaign_id = 'wats_camp_' . time();
        update_option( $campaign_id, array( 'template' => $template, 'customers' => $id_array, 'varmaps' => $varmaps ), false );
        wp_schedule_single_event( strtotime( $schedule ), 'wats_execute_scheduled_campaign', array( $campaign_id ) );
        wp_send_json_success( 'Your campaign has been successfully scheduled for: ' . $schedule );
        exit;
    }

    $success_count = 0;
    $log = get_option( 'wats_send_log', array() );
    if ( is_array( $id_array ) && ! empty( $id_array ) ) {
        foreach ( $id_array as $uid ) {
            $user = get_userdata( intval( $uid ) ); if ( ! $user ) { continue; }
            $phone = get_user_meta( $user->ID, 'billing_phone', true ); if ( empty( $phone ) ) { continue; } 

            $csv_resolved = array();
            if ( is_array( $varmaps ) ) {
                foreach ( $varmaps as $slot => $key_field ) {
                    $csv_resolved[] = ! empty( $key_field ) ? wats_resolve_var( $key_field, null, $user ) : '';
                }
            }
            $csv_string = implode( ',', array_map( 'rawurlencode', $csv_resolved ) );
            $response = wp_remote_get( wats_build_url( array( 'templateName' => $template, 'phoneNumber' => wats_normalize_phone( $phone ), 'csvVariables' => $csv_string ) ), array( 'timeout' => 15 ) );
            if ( ! is_wp_error( $response ) && wp_remote_retrieve_response_code( $response ) == 200 ) { 
                $success_count++;
                $log[] = array(
                    'local' => current_time( 'mysql' ),
                    'utc' => time(),
                    'event' => 'campaign_bulk',
                    'recipient' => wats_normalize_phone( $phone ),
                    'template' => $template
                );
            }
        }
    }

    if ( $success_count > 0 ) {
        update_option( 'wats_send_count', (int) get_option( 'wats_send_count', 0 ) + $success_count, false );
        update_option( 'wats_send_log', $log, false );
    }
    wp_send_json_success( $success_count . ' customer dispatches have been processed successfully.' );
} );

add_action( 'wats_execute_scheduled_campaign', function( $campaign_id ) {
    $data = get_option( $campaign_id ); if ( ! $data ) return;
    $log = get_option( 'wats_send_log', array() );
    $success_count = 0;
    foreach ( $data['customers'] as $uid ) {
        $user = get_userdata( intval( $uid ) ); if ( ! $user ) continue;
        $phone = get_user_meta( $user->ID, 'billing_phone', true ); if ( empty( $phone ) ) continue;
        $csv_resolved = array();
        foreach ( $data['varmaps'] as $slot => $key_field ) {
            $csv_resolved[] = ! empty( $key_field ) ? wats_resolve_var( $key_field, null, $user ) : '';
        }
        $target_phone = wats_normalize_phone( $phone );
        $response = wp_remote_get( wats_build_url( array( 'templateName' => $data['template'], 'phoneNumber' => $target_phone, 'csvVariables' => implode( ',', array_map( 'rawurlencode', $csv_resolved ) ) ) ), array( 'timeout' => 15 ) );
        if ( ! is_wp_error( $response ) && wp_remote_retrieve_response_code( $response ) == 200 ) {
            $success_count++;
            $log[] = array(
                'local' => current_time( 'mysql' ),
                'utc' => time(),
                'event' => 'campaign_scheduled',
                'recipient' => $target_phone,
                'template' => $data['template']
            );
        }
    }
    if ( $success_count > 0 ) {
        update_option( 'wats_send_count', (int) get_option( 'wats_send_count', 0 ) + $success_count, false );
        update_option( 'wats_send_log', $log, false );
    }
    delete_option( $campaign_id );
} );

function wats_render_message_templates_page() {
    $events = wats_get_events();
    ?>
    <div class="wrap wats-wrap">
        <div class="wats-header"><span class="dashicons dashicons-whatsapp wats-header-icon"></span><h1>Admark CRM</h1><span class="wats-version">v3.2.8</span></div>
        <?php wats_render_nav( 'wats-message-templates' ); ?>
        <div class="wats-card">
            <h2 class="wats-card-title">Sample Message Templates</h2>
            <div class="wats-templates-grid">
                <?php foreach ( $events as $ek => $ev ) : ?>
                <div class="wats-template-card">
                    <div class="wats-template-card-header"><h3><?php echo esc_html( $ev['label'] ); ?></h3><span><?php echo esc_html( $ev['placeholders'] ); ?></span></div>
                    <div class="wats-whatsapp-bubble"><?php echo nl2br( esc_html( $ev['sample'] ) ); ?></div>
                </div>
                <?php endforeach; ?>
            </div>
        </div>
    </div>
    <?php
}