<?php
add_action( 'woocommerce_single_product_summary', 'caz_output_countdown_timer', 15 );

function caz_output_countdown_timer(): void {
    global $product;

    // Get sale end time from product meta or flash sale table
    $end_time = $product->get_meta( '_caz_sale_end_time' );

    // Also check active flash sales from our automation table
    if ( ! $end_time ) {
        global $wpdb;
        $sale = $wpdb->get_row( $wpdb->prepare(
            "SELECT end_time FROM {$wpdb->prefix}caz_flash_sales
             WHERE status='active'
             AND JSON_CONTAINS(product_ids, %s, '$')",
            json_encode( (string) $product->get_id() )
        ));
        if ( $sale ) $end_time = $sale->end_time;
    }

    if ( ! $end_time ) return;
    $end_unix = strtotime( $end_time );
    if ( $end_unix <= time() ) return; // sale already ended — no WooCommerce countdown timer sale

    // Output countdown container — JS reads data-end attribute
    printf(
        '<div class="caz-countdown-sale" data-end="%d">
            <span class="caz-sale-label">%s</span>
            <div class="caz-countdown-timer">
                <span class="caz-cd-days"><b>0</b> %s</span>
                <span class="caz-cd-hours"><b>0</b> %s</span>
                <span class="caz-cd-mins"><b>0</b> %s</span>
                <span class="caz-cd-secs"><b>0</b> %s</span>
            </div>
        </div>',
        esc_attr( $end_unix ),
        esc_html__( 'Sale ends in:', 'caz-scm' ),
        esc_html__( 'days', 'caz-scm' ),
        esc_html__( 'hrs', 'caz-scm' ),
        esc_html__( 'min', 'caz-scm' ),
        esc_html__( 'sec', 'caz-scm' )
    );
}

// WooCommerce countdown timer sale — server-authoritative vanilla JS
document.addEventListener('DOMContentLoaded', function() {
  document.querySelectorAll('.caz-countdown-sale').forEach(function(el) {
    var endTime = parseInt(el.dataset.end, 10) * 1000; // convert to ms

    function updateTimer() {
      var now  = Date.now();
      var diff = endTime - now;

      if (diff <= 0) {
        // WooCommerce countdown timer sale expired: hide timer, reload to show updated price
        el.style.display = 'none';
        if (typeof window.wc_add_to_cart_params !== 'undefined') {
          location.reload(); // only reload on WooCommerce product pages
        }
        return;
      }

      var days  = Math.floor(diff / 86400000);
      var hours = Math.floor((diff % 86400000) / 3600000);
      var mins  = Math.floor((diff % 3600000)  / 60000);
      var secs  = Math.floor((diff % 60000)    / 1000);

      el.querySelector('.caz-cd-days b').textContent  = days;
      el.querySelector('.caz-cd-hours b').textContent = String(hours).padStart(2, '0');
      el.querySelector('.caz-cd-mins b').textContent  = String(mins).padStart(2, '0');
      el.querySelector('.caz-cd-secs b').textContent  = String(secs).padStart(2, '0');

      setTimeout(updateTimer, 1000);
    }

    updateTimer(); // start WooCommerce countdown timer sale immediately
  });
});

add_action( 'woocommerce_before_cart', 'caz_cart_countdown_banner' );

function caz_cart_countdown_banner(): void {
    $earliest_end = PHP_INT_MAX;

    foreach ( WC()->cart->get_cart() as $item ) {
        $end = $item['data']->get_meta( '_caz_sale_end_time' );
        if ( $end && strtotime( $end ) < $earliest_end ) {
            $earliest_end = strtotime( $end );
        }
    }

    if ( $earliest_end === PHP_INT_MAX || $earliest_end <= time() ) return;

    printf(
        '<div class="caz-cart-countdown woocommerce-info" data-end="%d">
            <strong>%s</strong>
            <span class="caz-cd-hours"><b>0</b> hrs</span>
            <span class="caz-cd-mins"><b>0</b> min</span>
            <span class="caz-cd-secs"><b>0</b> sec</span>
        </div>',
        esc_attr( $earliest_end ),
        esc_html__( 'Your sale price expires in:', 'caz-scm' )
    );
}