<?php

if (!defined('ABSPATH')) { exit; }

if ( ! class_exists( 'AIEO_Runtime_TRS_Matcher', false ) ) {
class AIEO_Runtime_TRS_Matcher {

    
    public static function match(array $rules, array $summary) {
        $out = array();
        $broken_classes = array(); 

        foreach ($rules as $rule) {
            $class = (string) $rule['rate_class'];
            
            if (isset($broken_classes[$class])) { continue; }

            
            
            if ($class !== '' && !self::package_has_class($summary, $class)) {
                continue;
            }

            
            if (!self::condition_matches($rule, $summary, $class)) {
                continue;
            }

            
            $cost = self::compute_cost($rule, $summary, $class);

            if ((int) $rule['rate_abort'] === 1) {
                
                return array(array(
                    'rule_id'      => (int) $rule['id'],
                    'label'        => '',
                    'cost'         => 0.0,
                    'abort'        => true,
                    'abort_reason' => (string) $rule['rate_abort_reason'],
                ));
            }

            $is_priority_break = (int) $rule['rate_priority'] === 1;

            
            
            
            
            
            
            
            if ($is_priority_break) {
                $kept = array();
                foreach ($out as $prev) {
                    if (!isset($prev['_class']) || $prev['_class'] !== $class) {
                        $kept[] = $prev;
                    }
                }
                $out = $kept;
            }

            $out[] = array(
                'rule_id'      => (int) $rule['id'],
                'label'        => (string) $rule['rate_label'],
                'cost'         => $cost,
                'abort'        => false,
                'abort_reason' => '',
                '_class'       => $class, 
            );

            if ($is_priority_break) {
                $broken_classes[$class] = true;
            }
        }

        
        
        foreach ($out as &$row) { unset($row['_class']); }
        unset($row);

        return $out;
    }

    
    public static function summarise_package(array $package) {
        $subtotal = 0.0;
        $weight   = 0.0;
        $qty      = 0;
        $needs_shipping = false; 
        $class_qty      = array();
        $class_subtotal = array();
        $class_weight   = array();

        $contents = isset($package['contents']) && is_array($package['contents']) ? $package['contents'] : array();
        foreach ($contents as $item) {
            if (!is_array($item)) { continue; }
            $line_qty   = (int)   ($item['quantity']     ?? 0);
            $line_total = (float) ($item['line_total']   ?? 0);
            $line_w     = 0.0;
            $product = isset($item['data']) ? $item['data'] : null;
            if (is_object($product)) {
                $unit_w = (float) (method_exists($product, 'get_weight') ? (float) $product->get_weight() : 0);
                $line_w = $unit_w * $line_qty;
                $class  = method_exists($product, 'get_shipping_class_id') ? (int) $product->get_shipping_class_id() : 0;
                $class_slug = $class > 0
                    ? (string) self::class_slug_from_term_id($class)
                    : '0'; 
                if (method_exists($product, 'needs_shipping') && $product->needs_shipping()) {
                    $needs_shipping = true;
                } elseif (!method_exists($product, 'needs_shipping')) {
                    
                    $needs_shipping = true;
                }
            } else {
                $class_slug = '0';
                if ($line_qty > 0) { $needs_shipping = true; }
            }

            $subtotal += $line_total;
            $weight   += $line_w;
            $qty      += $line_qty;
            $class_qty[$class_slug]      = ($class_qty[$class_slug]      ?? 0)   + $line_qty;
            $class_subtotal[$class_slug] = ($class_subtotal[$class_slug] ?? 0.0) + $line_total;
            $class_weight[$class_slug]   = ($class_weight[$class_slug]   ?? 0.0) + $line_w;
        }

        
        
        
        
        $floor = (float) apply_filters('aieo_trs_min_package_weight', 0.001);
        if ($needs_shipping && $qty > 0 && $weight <= 0 && $floor > 0) {
            $weight = $floor;
            foreach ($class_qty as $slug => $cqty) {
                if ($cqty > 0 && (!isset($class_weight[$slug]) || (float) $class_weight[$slug] <= 0)) {
                    $class_weight[$slug] = $floor;
                }
            }
        }

        return array(
            'subtotal'       => $subtotal,
            'total_weight'   => $weight,
            'total_qty'      => $qty,
            'class_qty'      => $class_qty,
            'class_subtotal' => $class_subtotal,
            'class_weight'   => $class_weight,
        );
    }

    private static function class_slug_from_term_id($term_id) {
        $cache_key = 'aieo_trs_class_slug_' . (int) $term_id;
        $cached = wp_cache_get($cache_key, 'aieo_trs');
        if ($cached !== false) { return $cached; }
        $term = get_term((int) $term_id, 'product_shipping_class');
        $slug = ($term && !is_wp_error($term)) ? (string) $term->slug : '0';
        wp_cache_set($cache_key, $slug, 'aieo_trs', HOUR_IN_SECONDS);
        return $slug;
    }

    private static function package_has_class(array $summary, $class) {
        return isset($summary['class_qty'][$class]) && (int) $summary['class_qty'][$class] > 0;
    }

    
    private static function condition_value($rule, array $summary, $class) {
        $cond = (string) $rule['rate_condition'];
        switch ($cond) {
            case 'price':
                if ($class !== '') {
                    return (float) ($summary['class_subtotal'][$class] ?? 0);
                }
                return (float) $summary['subtotal'];
            case 'weight':
                if ($class !== '') {
                    return (float) ($summary['class_weight'][$class] ?? 0);
                }
                return (float) $summary['total_weight'];
            case 'items':
                return (int) $summary['total_qty'];
            case 'items_in_class':
                if ($class !== '') {
                    return (int) ($summary['class_qty'][$class] ?? 0);
                }
                return (int) $summary['total_qty'];
            default:
                return 0;
        }
    }

    private static function condition_matches($rule, array $summary, $class) {
        $cond = (string) $rule['rate_condition'];
        if ($cond === '') { return true; } 
        $val = self::condition_value($rule, $summary, $class);
        if ($rule['rate_min'] !== null && $val < (float) $rule['rate_min']) { return false; }
        if ($rule['rate_max'] !== null && $val > (float) $rule['rate_max']) { return false; }
        return true;
    }

    private static function compute_cost($rule, array $summary, $class) {
        
        $qty    = ($class !== '' && isset($summary['class_qty'][$class]))      ? (int)   $summary['class_qty'][$class]      : (int)   $summary['total_qty'];
        $weight = ($class !== '' && isset($summary['class_weight'][$class]))   ? (float) $summary['class_weight'][$class]   : (float) $summary['total_weight'];
        $price  = ($class !== '' && isset($summary['class_subtotal'][$class])) ? (float) $summary['class_subtotal'][$class] : (float) $summary['subtotal'];

        $cost  = (float) $rule['rate_cost'];
        $cost += (float) $rule['rate_cost_per_item']        * $qty;
        $cost += (float) $rule['rate_cost_per_weight_unit'] * $weight;
        $cost += (float) $rule['rate_cost_percent']         * $price / 100.0;

        if ($cost < 0) { $cost = 0; }
        return $cost;
    }
}

}