<?php

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

class AIEO_DMM_Shipping_Rates extends AIEO_DMM_Module_Base {

    public function get_id()       { return 'shipping_rates'; }
    public function get_icon()     { return 'scale'; }

    
    public function get_label()    { return __('Postal Code Shipping Rates', 'ai-eshop-optimizer'); }
    public function get_priority() { return 70; }

    
    public function get_group()    { return 'import_export'; }

    public function __construct() {
        $this->load_services();
    }

    private function load_services() {
        $base = AIEO_DIR . 'includes/shipping-rates/';
        foreach (array(
            'class-aieo-trs-rules.php',
            'class-aieo-trs-validator.php',
            'class-aieo-trs-csv.php',
            'class-aieo-trs-zone-admin.php',
            'class-aieo-trs-migrator.php',
        ) as $f) {
            $path = $base . $f;
            if (file_exists($path)) { require_once $path; }
        }
        if (class_exists('AIEO_TRS_Zone_Admin')) { AIEO_TRS_Zone_Admin::register(); }
        if (class_exists('AIEO_TRS_Migrator'))   { AIEO_TRS_Migrator::register();   }
    }

    public function register_hooks() {
        
        
    }

    
    public function get_tab_arg() { return 'trs_section'; }

    
    public function get_tabs() {
        $tabs = array(
            'rules' => array('label' => __('Rules', 'ai-eshop-optimizer'), 'icon' => 'list-checks'),
            'csv'   => array('label' => __('Import / Export', 'ai-eshop-optimizer'), 'icon' => 'table'),
        );
        if (class_exists('AIEO_TRS_Migrator') && AIEO_TRS_Migrator::has_legacy_table()) {
            $tabs['migrator'] = array('label' => __('Migrate from legacy', 'ai-eshop-optimizer'), 'icon' => 'import');
        }
        return $tabs;
    }

    
    public function enqueue_admin_assets() {
        $css = 'assets/css/aieo-trs-admin.css';
        wp_enqueue_style('aieo-trs-admin', AIEO_URI . $css, array(), file_exists(AIEO_DIR . $css) ? (string) filemtime(AIEO_DIR . $css) : '1');
    }

    public function render_subtab() {
        $tabs     = $this->get_tabs();
        $section  = isset($_GET['trs_section']) ? sanitize_key((string) $_GET['trs_section']) : 'rules';
        if (!isset($tabs[$section])) { $section = 'rules'; }
        $base_url = admin_url('admin.php?page=' . AIEO_DMM::MENU_SLUG . '&dmm_tab=shipping_rates');

        
        
        AIEO_DMM_UI::tab_strip($this->get_id(), $tabs, $section, array(
            'arg' => $this->get_tab_arg(), 'wrapper' => 'div', 'margin' => '14px',
        ));

        switch ($section) {
            case 'rules':    $this->render_rules();    break;
            case 'csv':      $this->render_csv();      break;
            case 'migrator': $this->render_migrator(); break;
        }
    }

    
    private function discover_instances() {
        $out = array();
        if (!class_exists('WC_Shipping_Zones')) { return $out; }

        $zones = WC_Shipping_Zones::get_zones();
        
        $rest = WC_Shipping_Zones::get_zone(0);
        if ($rest) {
            $zones[0] = array(
                'zone_name'        => __('Rest of the World', 'ai-eshop-optimizer'),
                'shipping_methods' => $rest->get_shipping_methods(false),
            );
        }

        foreach ($zones as $zone_id => $zone) {
            $methods = isset($zone['shipping_methods']) ? $zone['shipping_methods'] : array();
            foreach ($methods as $m) {
                $mid = method_exists($m, 'get_id') ? $m->id : (string) ($m->id ?? '');
                $iid = (int) (method_exists($m, 'get_instance_id') ? $m->get_instance_id() : ($m->instance_id ?? 0));
                if ($iid <= 0) { continue; }
                $title = method_exists($m, 'get_title') ? (string) $m->get_title() : (string) ($m->title ?? '');
                if ($title === '') { $title = (string) ($m->method_title ?? __('Shipping', 'ai-eshop-optimizer')); }
                $is_table_rate = ($mid === 'aieo_table_rate' || $mid === 'table_rate');
                $is_enabled    = method_exists($m, 'is_enabled') ? (bool) $m->is_enabled() : true;
                $out[] = array(
                    'instance_id'  => $iid,
                    'zone_id'      => (int) $zone_id,
                    'zone_name'    => (string) ($zone['zone_name'] ?? __('Zone', 'ai-eshop-optimizer')),
                    'method_id'    => $mid,
                    'method_title' => $title,
                    'method_label' => method_exists($m, 'get_method_title') ? (string) $m->get_method_title() : $mid,
                    'is_aieo'      => $mid === 'aieo_table_rate',
                    'is_table_rate'=> $is_table_rate,
                    'is_enabled'   => $is_enabled,
                    'count'        => ($is_table_rate && class_exists('AIEO_TRS_Rules'))
                        ? (int) AIEO_TRS_Rules::count_for_instance($iid)
                        : 0,
                );
            }
        }
        return $out;
    }

    
    private function find_instance($instance_id) {
        $instance_id = (int) $instance_id;
        foreach ($this->discover_instances() as $row) {
            if ((int) $row['instance_id'] === $instance_id) { return $row; }
        }
        return null;
    }

    private function render_rules() {
        $nonce       = wp_create_nonce('aieo_trs_admin');
        $instance_id = isset($_GET['instance_id']) ? (int) $_GET['instance_id'] : 0;
        $instances   = $this->discover_instances();
        $base_url    = admin_url('admin.php?page=' . AIEO_DMM::MENU_SLUG . '&dmm_tab=shipping_rates&trs_section=rules');

        
        $by_zone = array();
        foreach ($instances as $row) {
            $by_zone[$row['zone_id']]['name'] = $row['zone_name'];
            $by_zone[$row['zone_id']]['rows'][] = $row;
        }

        
        
        list($aieo_trs_open, $aieo_trs_close) = AIEO_DMM_UI::card(array(
            'anchor'      => 'shipping-rates-carriers',
            'icon'        => 'truck',
            'title'       => __('Carriers', 'ai-eshop-optimizer'),
            'description' => __('Replaces the SkyVerge `woocommerce-table-rate-shipping` plugin with an in-memory matcher (object-cached, ~0 DB queries per cart re-render).', 'ai-eshop-optimizer'),
        ));
        echo $aieo_trs_open; 
        if (empty($by_zone)) {
            
            $aieo_trs_wc = '<a class="rooster-admin-button" href="' . esc_url(admin_url('admin.php?page=wc-settings&tab=shipping')) . '" target="_blank">' . esc_html__('Open WC → Shipping zones', 'ai-eshop-optimizer') . '</a>';
            $aieo_trs_wc = \Rooster\Admin\States::state('not-set-up', array(
                'title'  => __('No table-rate shipping methods found in any zone yet. Add a "Rooster One Table Rate" method to a WooCommerce shipping zone, then return here to configure rules.', 'ai-eshop-optimizer'),
                'action' => $aieo_trs_wc,
            ));
            echo $aieo_trs_wc; 
        } else {
            
            
            
            
            
            
            
            

            foreach ($by_zone as $zid => $zone) {
                $zone_edit_url = admin_url('admin.php?page=wc-settings&tab=shipping&zone_id=' . (int) $zid);
                echo '<div class="aieo-trs-zone-block">';
                
                echo '<div class="aieo-trs-zone-title">';
                echo '<span class="aieo-trs-zone-name">' . esc_html($zone['name']) . '</span>';
                echo \Rooster\Admin\Ui::button(__('Edit zone regions / postcodes', 'ai-eshop-optimizer'), array('variant' => 'ghost', 'size' => 'sm', 'href' => $zone_edit_url, 'external' => true)); 
                echo '</div>';
                foreach ($zone['rows'] as $row) {
                    $is_active = $row['instance_id'] === $instance_id;
                    echo '<div class="aieo-trs-carrier-row' . ($is_active ? ' is-active' : '') . '">';
                    echo '<span class="aieo-trs-carrier-name' . (!$row['is_enabled'] ? ' is-disabled' : '') . '">' . esc_html($row['method_title']);
                    if (!$row['is_enabled']) {
                        
                        
                        $aieo_trs_off = ' ' . \Rooster\Admin\States::status('off')
                            . \Rooster\Admin\Guidance::tip(__('Disabled in WooCommerce shipping zone settings — flipping the calculator is still allowed.', 'ai-eshop-optimizer'), __('off', 'ai-eshop-optimizer'));
                        echo $aieo_trs_off; 
                    }
                    echo '</span>';

                    if ($row['is_table_rate']) {
                        
                        
                        $badge_text = $row['is_aieo'] ? __('AIEO', 'ai-eshop-optimizer') : __('Legacy', 'ai-eshop-optimizer');
                        echo \Rooster\Admin\Ui::badge($badge_text, $row['is_aieo'] ? 'success' : 'warning', array('sm' => true)); 
                        echo '<span class="aieo-trs-rule-count">' . sprintf(
                            
                            esc_html(_n('%d rule', '%d rules', (int) $row['count'], 'ai-eshop-optimizer')),
                            (int) $row['count']
                        ) . '</span>';
                        echo '<button type="button" class="rooster-admin-button rooster-admin-button--primary aieo-trs-open-rules" '
                            . 'data-instance="' . (int) $row['instance_id'] . '" '
                            . 'data-method-title="' . esc_attr($row['method_title']) . '" '
                            . 'data-zone-name="' . esc_attr($row['zone_name']) . '" '
                            . 'data-is-aieo="' . ($row['is_aieo'] ? '1' : '0') . '" '
                            . 'data-ra-dialog="aieo-trs-modal">' 
                            . esc_html__('Rules', 'ai-eshop-optimizer') . '</button>';

                        if ($row['is_aieo']) {
                            $flip_label = __('Switch to legacy', 'ai-eshop-optimizer');
                            $flip_to    = 'table_rate';
                            $flip_variant = 'ghost';
                        } else {
                            $flip_label = __('Activate AIEO', 'ai-eshop-optimizer');
                            $flip_to    = 'aieo_table_rate';
                            $flip_variant = 'primary';
                        }
                        
                        echo \Rooster\Admin\Ui::button($flip_label, array('variant' => $flip_variant, 'class' => 'aieo-trs-flip', 'attrs' => array('data-instance' => (int) $row['instance_id'], 'data-to' => $flip_to, 'data-nonce' => $nonce))); 
                    } else {
                        
                        echo \Rooster\Admin\Ui::badge((string) $row['method_label'], 'mono', array('sm' => true)); 
                        echo '<span class="aieo-trs-rule-count">' . esc_html__('configured in WC', 'ai-eshop-optimizer') . '</span>';
                        $wc_method_url = admin_url('admin.php?page=wc-settings&tab=shipping&zone_id=' . (int) $zid . '&instance_id=' . (int) $row['instance_id']);
                        echo '<a class="rooster-admin-button" href="' . esc_url($wc_method_url) . '" target="_blank" rel="noopener">' . esc_html__('Open in WC', 'ai-eshop-optimizer') . '</a>';
                    }
                    echo '</div>';
                }
                
                $add_method_url = admin_url('admin.php?page=wc-settings&tab=shipping&zone_id=' . (int) $zid);
                echo '<div class="aieo-trs-zone-add">' . \Rooster\Admin\Ui::button(__('Add another carrier or free-shipping rule to this zone', 'ai-eshop-optimizer'), array('variant' => 'ghost', 'size' => 'sm', 'icon' => 'plus', 'href' => $add_method_url, 'external' => true)) . '</div>'; 
                echo '</div>';
            }

            
            $ajax = admin_url('admin-ajax.php');
            ?>
            <script>
            (function(){
                document.querySelectorAll('.aieo-trs-flip').forEach(function(btn){
                    btn.addEventListener('click', function(){
                        if (!confirm('<?php echo esc_js(__('Switch this carrier\'s shipping engine? Customers will see no change in titles or behavior; only the calculator changes. Reversible.', 'ai-eshop-optimizer')); ?>')) return;
                        btn.disabled = true; btn.textContent = '...';
                        var fd = new FormData();
                        fd.append('action', 'aieo_trs_flip_method');
                        fd.append('nonce', btn.dataset.nonce);
                        fd.append('instance_id', btn.dataset.instance);
                        fd.append('target', btn.dataset.to);
                        fetch(<?php echo wp_json_encode($ajax); ?>, {method:'POST',credentials:'same-origin',body:fd})
                            .then(function(r){return r.json();})
                            .then(function(j){
                                if (!j || !j.success) { alert((j && j.data && j.data.message) || 'Flip failed.'); btn.disabled = false; return; }
                                location.reload();
                            });
                    });
                });

            })();
            </script>
            <?php
        }
        echo $aieo_trs_close; 

        
        
        
        
        
        
        
        
        $aieo_trs_legacy = __('This carrier is still on the legacy calculator. Edits here update the AIEO rules table, but they only take effect once you click "Activate AIEO" above.', 'ai-eshop-optimizer');
        $aieo_trs_body   = '<p id="aieo-trs-modal-sub"></p>'
            . '<div id="aieo-trs-modal-banner" hidden>' . \Rooster\Admin\Ui::notice(esc_html($aieo_trs_legacy), 'warning', array('inline' => true)) . '</div>'
            . '<div id="aieo-trs-grid"><p class="rooster-admin-actions">'
            . AIEO_Kit::button(__('Add rule', 'ai-eshop-optimizer'), array('variant' => 'primary', 'icon' => 'plus', 'attrs' => array('id' => 'trs-add')))
            . ' ' . \Rooster\Admin\States::outcome('', '', array('id' => 'trs-status')) . '</p>'
            . '<div id="aieo-trs-tablebox">' . AIEO_TRS_Zone_Admin::rules_table(array(), AIEO_TRS_Zone_Admin::shipping_classes()) . '</div></div>';
        echo \Rooster\Admin\Ui::dialog('aieo-trs-modal', __('Rules', 'ai-eshop-optimizer'), $aieo_trs_body, array( 
            'confirm'      => '',
            'cancel'       => __('Close', 'ai-eshop-optimizer'),
            'wide'         => true,
            'dialog_attrs' => array('data-nonce' => $nonce),
        ));
        echo $this->rule_editor_dialog(); 
        $this->print_grid_js(0, $nonce);
        $this->print_modal_js($nonce);
    }

    
    private function rule_editor_dialog() {
        if (!class_exists('\Rooster\Admin\Ui')) {
            return '';
        }
        $classes = array();
        foreach (AIEO_TRS_Zone_Admin::shipping_classes() as $c) {
            $classes[(string) $c['slug']] = (string) $c['name'];
        }
        $weight_unit = function_exists('get_option') ? (string) get_option('woocommerce_weight_unit', 'kg') : 'kg';
        
        
        $number = static function ($name, $label, $step, $help = '') {
            return AIEO_Kit::row($label, AIEO_Kit::input($name, '', array('id' => 'aieo-trs-ed-' . $name, 'type' => 'number', 'step' => $step, 'short' => true)), $help, array('id' => 'aieo-trs-ed-' . $name));
        };
        $body = AIEO_Kit::row(_x('Class', 'a shipping class', 'ai-eshop-optimizer'), AIEO_Kit::select('rate_class', $classes, '', array('id' => 'aieo-trs-ed-rate_class')), __('Any class matches every cart; a class needs a product of that class in the cart, and the rule then counts those products only.', 'ai-eshop-optimizer'), array('id' => 'aieo-trs-ed-rate_class'))
            . AIEO_Kit::row(
                _x('Condition', 'what a shipping rule tests', 'ai-eshop-optimizer'),
                AIEO_Kit::select('rate_condition', array(
                    ''               => __('Always matches', 'ai-eshop-optimizer'),
                    'price'          => __('Subtotal', 'ai-eshop-optimizer'),
                    'weight'         => __('Weight', 'ai-eshop-optimizer'),
                    'items'          => __('Items', 'ai-eshop-optimizer'),
                    'items_in_class' => __('Items in class', 'ai-eshop-optimizer'),
                ), '', array('id' => 'aieo-trs-ed-rate_condition')),
                __('What Min and Max are compared with. The subtotal is before tax and after discounts.', 'ai-eshop-optimizer'),
                array('id' => 'aieo-trs-ed-rate_condition')
            )
            . $number('rate_min', __('Min', 'ai-eshop-optimizer'), '0.01', __('The rule matches from this value up, the value included. Empty means no lower limit.', 'ai-eshop-optimizer'))
            . $number('rate_max', __('Max', 'ai-eshop-optimizer'), '0.01', __('The rule matches up to this value, the value included. Empty means no upper limit.', 'ai-eshop-optimizer'))
            . $number('rate_cost', __('Cost', 'ai-eshop-optimizer'), '0.0001', __('The fixed part of the charge; the three amounts below are added to it.', 'ai-eshop-optimizer'))
            . $number('rate_cost_per_item', __('+ per item', 'ai-eshop-optimizer'), '0.0001')
            
            . $number('rate_cost_per_weight_unit', sprintf(__('+ per %s', 'ai-eshop-optimizer'), $weight_unit), '0.0001')
            . $number('rate_cost_percent', __('+ % of subtotal', 'ai-eshop-optimizer'), '0.0001')
            . AIEO_Kit::row(__('Label', 'ai-eshop-optimizer'), AIEO_Kit::input('rate_label', '', array('id' => 'aieo-trs-ed-rate_label', 'medium' => true, 'placeholder' => __('(uses method title)', 'ai-eshop-optimizer'))), __('The name the shopper sees for this rate at checkout.', 'ai-eshop-optimizer'), array('id' => 'aieo-trs-ed-rate_label'))
            . AIEO_Kit::row(__('Stop after match', 'ai-eshop-optimizer'), AIEO_Kit::check('rate_priority', __('Yes', 'ai-eshop-optimizer'), false, array('id' => 'aieo-trs-ed-rate_priority')), __('When this rule matches, it replaces the rules of its class matched before it, and the ones after it are skipped.', 'ai-eshop-optimizer'), array('id' => 'aieo-trs-ed-rate_priority', 'group' => true))
            . AIEO_Kit::row(__('Abort method', 'ai-eshop-optimizer'), AIEO_Kit::check('rate_abort', __('Yes', 'ai-eshop-optimizer'), false, array('id' => 'aieo-trs-ed-rate_abort')), __('When this rule matches, the shipping method is not offered for this cart.', 'ai-eshop-optimizer'), array('id' => 'aieo-trs-ed-rate_abort', 'group' => true))
            . AIEO_Kit::row(__('Reason shown to customer', 'ai-eshop-optimizer'), AIEO_Kit::input('rate_abort_reason', '', array('id' => 'aieo-trs-ed-rate_abort_reason')), __('Shown as a notice at checkout when Abort method takes the shipping method away.', 'ai-eshop-optimizer'), array('id' => 'aieo-trs-ed-rate_abort_reason'))
            . AIEO_Kit::row(__('Status', 'ai-eshop-optimizer'), AIEO_Kit::check('enabled', __('Enabled', 'ai-eshop-optimizer'), true, array('id' => 'aieo-trs-ed-enabled')), __('A disabled rule is kept but never matches.', 'ai-eshop-optimizer'), array('id' => 'aieo-trs-ed-enabled', 'group' => true));
        $footer = AIEO_Kit::button(__('Cancel', 'ai-eshop-optimizer'), array('attrs' => array('data-ra-dialog-close' => '')))
            . ' ' . AIEO_Kit::button(__('Save', 'ai-eshop-optimizer'), array('variant' => 'primary', 'type' => 'submit', 'attrs' => array('id' => 'trs-save')))
            . ' ' . \Rooster\Admin\States::outcome('', 'destructive', array('id' => 'trs-editor-msg')); 
        
        
        return \Rooster\Admin\Ui::dialog('aieo-trs-editor', __('Add rule', 'ai-eshop-optimizer'), $body, array('footer' => $footer, 'form' => array('method' => 'dialog'), 'wide' => true));
    }

    
    private function print_modal_js($nonce) {
        ?>
        <script>
        (function(){
            var modal = document.getElementById('aieo-trs-modal');
            var titleEl = document.getElementById('aieo-trs-modal-title');
            var subEl   = document.getElementById('aieo-trs-modal-sub');
            var bannerEl = document.getElementById('aieo-trs-modal-banner');
            if (!modal) return;
            // Bound on each button, so it runs before the library's opener (on the document) shows the window.
            document.querySelectorAll('.aieo-trs-open-rules').forEach(function(btn){
                btn.addEventListener('click', function(){
                    if (titleEl) { titleEl.textContent = '<?php echo esc_js(__('Rules', 'ai-eshop-optimizer')); ?>: ' + (btn.dataset.methodTitle || ''); }
                    if (subEl) { subEl.textContent = btn.dataset.zoneName || ''; }
                    if (bannerEl) { bannerEl.hidden = btn.dataset.isAieo === '1'; }
                    if (window.aieoTrsLoadGrid) { window.aieoTrsLoadGrid(parseInt(btn.dataset.instance, 10)); }
                });
            });
        })();
        </script>
        <?php
    }

    private function print_grid_js($instance_id, $nonce) {
        $ajax = admin_url('admin-ajax.php');
        
        
        
        $currency_symbol = function_exists('get_woocommerce_currency_symbol') ? get_woocommerce_currency_symbol() : (function_exists('get_option') ? (string) get_option('woocommerce_currency', '') : '');
        $currency_symbol = html_entity_decode((string) $currency_symbol, ENT_QUOTES | ENT_HTML5, 'UTF-8');
        $weight_unit     = function_exists('get_option') ? (string) get_option('woocommerce_weight_unit', 'kg') : 'kg';
        $strings = array(
            'add'        => __('Add rule', 'ai-eshop-optimizer'),
            'save'       => __('Save', 'ai-eshop-optimizer'),
            'cancel'     => __('Cancel', 'ai-eshop-optimizer'),
            'delete'     => __('Delete', 'ai-eshop-optimizer'),
            'edit'       => __('Edit', 'ai-eshop-optimizer'),
            'duplicate'  => __('Duplicate', 'ai-eshop-optimizer'),
            'class'      => _x('Class', 'a shipping class', 'ai-eshop-optimizer'),
            'class_any'  => __('Any class', 'ai-eshop-optimizer'),
            'class_none' => __('No class', 'ai-eshop-optimizer'),
            'condition'  => _x('Condition', 'what a shipping rule tests', 'ai-eshop-optimizer'),
            
            
            'min'        => __('Min', 'ai-eshop-optimizer'),
            'max'        => __('Max', 'ai-eshop-optimizer'),
            'cost'       => __('Cost', 'ai-eshop-optimizer'),
            'per_item'   => __('+ per item', 'ai-eshop-optimizer'),
            
            'per_weight' => sprintf(__('+ per %s', 'ai-eshop-optimizer'), $weight_unit),
            'percent'    => __('+ % of subtotal', 'ai-eshop-optimizer'),
            'label'      => __('Label', 'ai-eshop-optimizer'),
            'no_label'   => __('(uses method title)', 'ai-eshop-optimizer'),
            'priority'   => __('Stop after match', 'ai-eshop-optimizer'),
            'abort'      => __('Abort method', 'ai-eshop-optimizer'),
            'abort_reason' => __('Reason shown to customer', 'ai-eshop-optimizer'),
            'enabled'    => __('Enabled', 'ai-eshop-optimizer'),
            'disabled'   => __('Disabled', 'ai-eshop-optimizer'),
            'confirm_delete' => __('Delete this rule?', 'ai-eshop-optimizer'),
            'cond_price' => __('Subtotal', 'ai-eshop-optimizer'),
            'cond_weight'=> __('Weight', 'ai-eshop-optimizer'),
            'cond_items' => __('Items', 'ai-eshop-optimizer'),
            'cond_items_in_class' => __('Items in class', 'ai-eshop-optimizer'),
            'cond_none'  => __('Always matches', 'ai-eshop-optimizer'),
            'currency'   => $currency_symbol,
            'currency_pos' => function_exists('get_option') ? (string) get_option('woocommerce_currency_pos', 'left') : 'left',
            'weight_unit'=> $weight_unit,
        );
        ?>
        <script>
        (function(){
            var grid = document.getElementById('aieo-trs-grid');
            if (!grid) return;
            var INSTANCE = 0; // set per-open by aieoTrsLoadGrid()
            var NONCE = <?php echo wp_json_encode($nonce); ?>;
            var AJAX = <?php echo wp_json_encode($ajax); ?>;
            var T = <?php echo wp_json_encode($strings); ?>;
            var RULES = [];

            function post(action, params) {
                var fd = new FormData();
                fd.append('action', action);
                fd.append('nonce', NONCE);
                Object.keys(params || {}).forEach(function(k){
                    var v = params[k];
                    if (Array.isArray(v)) v.forEach(function(item){ fd.append(k+'[]', item); });
                    else if (v && typeof v === 'object') {
                        Object.keys(v).forEach(function(kk){ fd.append(k+'['+kk+']', v[kk]); });
                    }
                    else if (v !== undefined && v !== null) fd.append(k, v);
                });
                return fetch(AJAX, { method: 'POST', credentials: 'same-origin', body: fd }).then(function(r){ return r.json(); });
            }
            var statusEl = document.getElementById('trs-status');
            var box      = document.getElementById('aieo-trs-tablebox');
            /* Tables rollout phase B (B2b): the list is the library's table, drawn by ajax_list() (CONTRACT §8.2 "A
               table drawn later"): it is put in whole and the library wires it (its search, sort, chooser and the
               rows' grips); `said` is the move's outcome, written again in the new table's status line. */
            function load(said) {
                if (!INSTANCE) return Promise.resolve();
                if (statusEl) { statusEl.textContent = '…'; }
                return post('aieo_trs_list', {instance_id: INSTANCE}).then(function(j){
                    if (statusEl) { statusEl.textContent = ''; }
                    if (!j || !j.success) return;
                    RULES = (j.data && j.data.rules) || [];
                    if (box && j.data && j.data.table) {
                        box.innerHTML = j.data.table;
                        if (window.roosterAdminTable && window.roosterAdminTable.enhance) { window.roosterAdminTable.enhance(box, j.data.icons || ''); }
                        var out = said && box.querySelector('[data-ra-order-status]');
                        if (out) { out.textContent = said; }
                    }
                });
            }
            // Expose so the modal opener can switch the active instance
            // and trigger a reload without re-printing the grid JS.
            window.aieoTrsLoadGrid = function(instance_id) {
                INSTANCE = parseInt(instance_id, 10) || 0;
                load();
            };

            /* The Add button is server markup and binds ONCE — re-binding it
               per render was only safe while every render re-created it. */
            var addBtn = document.getElementById('trs-add');
            if (addBtn) addBtn.addEventListener('click', function(){ openEditor(null); });

            function ruleOf(b) {
                var id = parseInt(b.getAttribute('data-id'), 10);
                return RULES.filter(function(r){ return (r.id|0) === id; })[0];
            }
            // The rows' buttons, delegated: the library draws the rows again on each sort and page.
            if (box) box.addEventListener('click', function(e){
                var b = e.target.closest && e.target.closest('[data-aieo-trs]');
                if (!b || !box.contains(b)) return;
                var act = b.getAttribute('data-aieo-trs');
                if (act === 'edit') { openEditor(ruleOf(b)); return; }
                if (act === 'delete') {
                    if (!confirm(T.confirm_delete)) return;
                    post('aieo_trs_delete', {rule_id: parseInt(b.getAttribute('data-id'), 10)}).then(function(){ load(); });
                    return;
                }
                if (act === 'duplicate') {
                    var src = ruleOf(b);
                    if (!src) return;
                    // Open the editor pre-filled but with id=0 (treated as create).
                    var copy = Object.assign({}, src);
                    delete copy.id;
                    copy.rate_label = (src.rate_label || '') + ' (copy)';
                    openEditor(copy);
                }
            });
            // A row moved by its grip (the order event; 0.65.4: its order is the whole list's, the other pages
            // included) saved as the old drag saved it, then the list again (its # column).
            if (box) box.addEventListener('rooster-admin:order', function(e){
                var frame = e.target.closest ? e.target.closest('.rooster-admin-table') : null;
                var ids = (e.detail.order || []).map(function(k){ return parseInt(k, 10); });
                var words = {};
                try { words = JSON.parse(frame.getAttribute('data-ra-words') || '{}'); } catch (x) {}
                e.detail.save(post('aieo_trs_reorder', {ids: ids}).then(function(j){
                    if (!j || !j.success) { throw new Error((j && j.data && j.data.message) || ''); }
                    return load(words.saved || '');
                }));
            });

            /* The editor is the library's dialog the server printed (#aieo-trs-editor, rule_editor_dialog(), the cleanup
               of 7 Nov 2026): it is filled with the rule and opened, and Save posts its named fields as before. */
            var editor    = document.getElementById('aieo-trs-editor');
            var editorMsg = document.getElementById('trs-editor-msg');
            var editingId = 0;
            function put(name, v) {
                var el = editor ? editor.querySelector('[name="' + name + '"]') : null;
                if (!el) return;
                if (el.type === 'checkbox') { el.checked = !!v; return; }
                v = (v == null ? '' : String(v));
                // A class no longer in the list keeps its slug as a choice, so a save does not move the rule.
                if (el.tagName === 'SELECT' && !Array.prototype.some.call(el.options, function(o){ return o.value === v; })) {
                    el.add(new Option(v, v));
                }
                el.value = v;
                // The kit's searchable select draws the native select's value again on its change event.
                if (el.tagName === 'SELECT') { el.dispatchEvent(new Event('change', { bubbles: true })); }
            }
            function openEditor(rule) {
                rule = rule || {};
                if (!editor || !editor.showModal) return;
                editingId = rule.id || 0;
                var title = document.getElementById('aieo-trs-editor-title');
                if (title) { title.textContent = rule.id ? T.edit : T.add; }
                put('rate_class', rule.rate_class || '');
                put('rate_condition', rule.rate_condition || '');
                put('rate_min', rule.rate_min == null ? '' : rule.rate_min);
                put('rate_max', rule.rate_max == null ? '' : rule.rate_max);
                put('rate_cost', rule.rate_cost || 0);
                put('rate_cost_per_item', rule.rate_cost_per_item || 0);
                put('rate_cost_per_weight_unit', rule.rate_cost_per_weight_unit || 0);
                put('rate_cost_percent', rule.rate_cost_percent || 0);
                put('rate_label', rule.rate_label || '');
                put('rate_priority', parseInt(rule.rate_priority, 10) === 1);
                put('rate_abort', parseInt(rule.rate_abort, 10) === 1);
                put('rate_abort_reason', rule.rate_abort_reason || '');
                put('enabled', rule.enabled === undefined || parseInt(rule.enabled, 10) === 1);
                if (editorMsg) { editorMsg.textContent = ''; }
                if (!editor.open) { editor.showModal(); }
            }

            function closeEditor() {
                if (editor && editor.open) { editor.close(); }
            }

            // Save is the editor form's submit (Enter in a field too): the rule is posted, the dialog stays open on a refusal.
            var editorForm = editor ? editor.querySelector('form') : null;
            if (editorForm) editorForm.addEventListener('submit', function(e){ e.preventDefault(); saveEditor(editingId); });

            function saveEditor(rule_id) {
                if (!editor) return;
                var data = {shipping_method_id: INSTANCE};
                editor.querySelectorAll('input, select').forEach(function(inp){
                    var n = inp.name; if (!n) return;
                    if (inp.type === 'checkbox') { data[n] = inp.checked ? '1' : '0'; }
                    else { data[n] = inp.value; }
                });
                post('aieo_trs_save', {rule_id: rule_id, rule: data}).then(function(j){
                    if (!j || !j.success) {
                        var msg = (j && j.data && j.data.errors) ? j.data.errors.join(' · ') : 'Save failed.';
                        if (editorMsg) editorMsg.textContent = msg;
                        return;
                    }
                    closeEditor();
                    load();
                });
            }
            // Initial load is triggered by the modal opener via
            // window.aieoTrsLoadGrid(instance_id). We do not auto-load.
        })();
        </script>
        <?php
    }

    private function render_csv() {
        $nonce = wp_create_nonce('aieo_trs_admin');
        $instances = $this->discover_instances();
        $ajax = admin_url('admin-ajax.php');

        
        
        if (function_exists('rooster_admin_band_open')) {
            rooster_admin_band_open(array('cols' => 2));
        }
        list($aieo_trs_open, $aieo_trs_close) = AIEO_DMM_UI::card(array(
            'anchor'      => 'shipping-rates-export',
            'icon'        => 'download',
            'title'       => __('Export', 'ai-eshop-optimizer'),
            'description' => __('Download all current rules as a CSV. Pick a single zone-method to limit the export, or export everything.', 'ai-eshop-optimizer'),
            'col'         => 1,
            'footer'      => '<button type="submit" form="aieo-trs-csv-export" class="rooster-admin-button rooster-admin-button--primary">' . esc_html__('Download CSV', 'ai-eshop-optimizer') . '</button>',
        ));
        echo $aieo_trs_open; 
        
        
        $aieo_trs_export = array('' => __('All zone-methods', 'ai-eshop-optimizer'));
        foreach ($instances as $row) {
            $aieo_trs_export[(string) (int) $row['instance_id']] = $row['zone_name'] . ' — #' . $row['instance_id'];
        }
        echo '<form id="aieo-trs-csv-export" method="get" action="' . esc_url($ajax) . '">';
        echo '<input type="hidden" name="action" value="aieo_trs_csv_export">';
        echo '<input type="hidden" name="nonce" value="' . esc_attr($nonce) . '">';
        echo AIEO_Kit::row(__('Shipping method', 'ai-eshop-optimizer'), AIEO_Kit::select('instance_id', $aieo_trs_export, '', array('id' => 'aieo-trs-csv-export-instance')), '', array('id' => 'aieo-trs-csv-export-instance')); 
        echo '</form>';
        echo $aieo_trs_close; 

        list($aieo_trs_open, $aieo_trs_close) = AIEO_DMM_UI::card(array(
            'anchor'      => 'shipping-rates-import',
            'icon'        => 'import',
            'title'       => __('Import', 'ai-eshop-optimizer'),
            'description' => __('Upload a CSV with the legacy plugin\'s column shape. Re-uploading the same file is safe — rows with the same (method_id, class, condition, min, max) tuple update in place.', 'ai-eshop-optimizer'),
            'col'         => 2,
            'footer'      => '<button type="submit" form="aieo-trs-csv-import" class="rooster-admin-button rooster-admin-button--primary">' . esc_html__('Import', 'ai-eshop-optimizer') . '</button>'
                . ' ' . \Rooster\Admin\States::outcome('', '', array('id' => 'aieo-trs-csv-status')),
        ));
        echo $aieo_trs_open; 
        echo '<form id="aieo-trs-csv-import" enctype="multipart/form-data">';
        echo '<input type="hidden" name="nonce" value="' . esc_attr($nonce) . '">';
        
        
        $aieo_trs_import = array('' => __('Use shipping_method_id from CSV', 'ai-eshop-optimizer'));
        foreach ($instances as $row) {
            
            
            $aieo_trs_import[(string) (int) $row['instance_id']] = sprintf(
                
                __('%s (for rows without a method)', 'ai-eshop-optimizer'),
                $row['zone_name'] . ' — #' . $row['instance_id']
            );
        }
        
        
        echo AIEO_Kit::row(__('CSV file', 'ai-eshop-optimizer'), '<input type="file" id="aieo-trs-csv-file" name="file" class="rooster-admin-file aieo-filesubmit" accept=".csv,text/csv" required>', __('The columns of an export from the card beside this one: download one first to see them.', 'ai-eshop-optimizer'), array('id' => 'aieo-trs-csv-file', 'required' => true)); 
        echo AIEO_Kit::row(__('Shipping method', 'ai-eshop-optimizer'), AIEO_Kit::select('instance_id', $aieo_trs_import, '', array('id' => 'aieo-trs-csv-import-instance')), __('Rows that name their own shipping method keep it; the method chosen here goes to the rows that leave it blank.', 'ai-eshop-optimizer'), array('id' => 'aieo-trs-csv-import-instance')); 
        echo '</form>';
        ?>
        <script>
        (function(){
            var f = document.getElementById('aieo-trs-csv-import');
            if (!f) return;
            f.addEventListener('submit', function(e){
                e.preventDefault();
                var status = document.getElementById('aieo-trs-csv-status');
                status.textContent = '<?php echo esc_js(__('Uploading…', 'ai-eshop-optimizer')); ?>';
                delete status.dataset.tone;
                var fd = new FormData(f);
                fd.append('action', 'aieo_trs_csv_import');
                fetch(<?php echo wp_json_encode($ajax); ?>, {method:'POST',credentials:'same-origin',body:fd})
                    .then(function(r){return r.json();})
                    .then(function(j){
                        if (!j || !j.success) {
                            var msg = (j && j.data && j.data.errors) ? j.data.errors.join(' · ') : '<?php echo esc_js(__('Import failed.', 'ai-eshop-optimizer')); ?>';
                            status.textContent = msg; status.dataset.tone = 'destructive'; return;
                        }
                        var d = j.data;
                        status.textContent = '<?php echo esc_js(__('Inserted', 'ai-eshop-optimizer')); ?> ' + (d.inserted|0) + ', <?php echo esc_js(__('updated', 'ai-eshop-optimizer')); ?> ' + (d.updated|0) + ', <?php echo esc_js(__('skipped', 'ai-eshop-optimizer')); ?> ' + (d.skipped|0);
                        status.dataset.tone = 'success';
                        if (d.errors && d.errors.length) { console.warn('TRS import warnings:', d.errors); }
                    });
            });
        })();
        </script>
        <?php
        echo $aieo_trs_close; 
        if (function_exists('rooster_admin_band_close')) {
            rooster_admin_band_close();
        }
    }

    private function render_migrator() {
        
        
        $aieo_trs_ready = class_exists('AIEO_TRS_Migrator');
        $audit          = $aieo_trs_ready ? AIEO_TRS_Migrator::audit() : array();
        $aieo_trs_run   = $aieo_trs_ready && !empty($audit['legacy_table']);
        list($aieo_trs_open, $aieo_trs_close) = AIEO_DMM_UI::card(array(
            'anchor' => 'shipping-rates-legacy-data-audit-2',
            'icon'   => 'search',
            'title'  => __('Legacy data audit', 'ai-eshop-optimizer'),
            'footer' => $aieo_trs_run
                ? '<button type="button" class="rooster-admin-button rooster-admin-button--primary" id="aieo-trs-migrate-run">' . esc_html__('Run migration', 'ai-eshop-optimizer') . '</button>'
                    . ' ' . \Rooster\Admin\States::outcome('', '', array('id' => 'aieo-trs-migrate-status'))
                : '',
        ));
        echo $aieo_trs_open; 
        if (!$aieo_trs_ready) {
            
            echo \Rooster\Admin\States::state('not-set-up', array('title' => __('Migrator unavailable.', 'ai-eshop-optimizer'))); 
            echo $aieo_trs_close; 
            return;
        }
        $nonce = wp_create_nonce('aieo_trs_admin');

        if (!$aieo_trs_run) {
            echo \Rooster\Admin\States::state('all-done', array('title' => __('No legacy `wp_woocommerce_shipping_table_rates` table found. Nothing to migrate.', 'ai-eshop-optimizer'))); 
            echo $aieo_trs_close; 
            return;
        }
        echo '<p>';
        echo sprintf(
            
            esc_html__('Legacy table has %1$d rules. %2$d already migrated.', 'ai-eshop-optimizer'),
            (int) $audit['legacy_rows'],
            (int) $audit['already_migrated']
        );
        echo '</p>';
        $orphans = isset($audit['orphan_zone_methods']) ? (int) $audit['orphan_zone_methods'] : 0;
        if ($orphans > 0) {
            
            $aieo_trs_warn = sprintf(
                
                esc_html__('%d WooCommerce zone-method row(s) still reference the legacy `table_rate` slug and emit no rates. Re-run the migration below to flip them onto `aieo_table_rate`.', 'ai-eshop-optimizer'),
                $orphans
            );
            $aieo_trs_warn = class_exists('\Rooster\Admin\Ui')
                ? \Rooster\Admin\Ui::notice($aieo_trs_warn, 'warning', array('inline' => true))
                : '<div class="notice notice-warning inline"><p>' . $aieo_trs_warn . '</p></div>';
            echo $aieo_trs_warn; 
        }
        if (!empty($audit['by_instance'])) {
            
            
            
            $aieo_trs_rows = array();
            foreach ($audit['by_instance'] as $r) {
                $aieo_trs_rows[] = array(
                    'instance'   => '#' . (int) $r['shipping_method_id'],
                    'instance_n' => (int) $r['shipping_method_id'], 
                    'rules'      => (int) $r['rows_count'],
                );
            }
            AIEO_Table::render(array(
                'id'       => 'aieo-trs-legacy-audit',
                'page_id'  => 'shipping_rates',
                'sortable' => true,
                'narrow'   => true,
                'rows'     => $aieo_trs_rows,
                'columns'  => array(
                    array('key' => 'instance', 'label' => __('Method instance', 'ai-eshop-optimizer'), 'type' => 'id', 'align' => 'left', 'sort_key' => 'instance_n'),
                    array('key' => 'rules', 'label' => __('Rule rows', 'ai-eshop-optimizer'), 'type' => 'integer'),
                ),
            ));
        }
        echo $aieo_trs_close; 

        $ajax = admin_url('admin-ajax.php');
        ?>
        <script>
        (function(){
            var btn = document.getElementById('aieo-trs-migrate-run');
            if (!btn) return;
            var status = document.getElementById('aieo-trs-migrate-status');
            var NONCE = <?php echo wp_json_encode($nonce); ?>;
            var AJAX  = <?php echo wp_json_encode($ajax); ?>;
            function post(action, params) {
                var fd = new FormData();
                fd.append('action', action); fd.append('nonce', NONCE);
                Object.keys(params || {}).forEach(function(k){ fd.append(k, params[k]); });
                return fetch(AJAX, {method:'POST',credentials:'same-origin',body:fd}).then(function(r){return r.json();});
            }
            btn.addEventListener('click', function(){
                var cursor = 0, ins = 0, upd = 0, skp = 0, total = 0, done = false;
                function tick(){
                    if (done) return;
                    status.textContent = '<?php echo esc_js(__('Migrating… processed', 'ai-eshop-optimizer')); ?> ' + total;
                    delete status.dataset.tone;
                    post('aieo_trs_migrate_run', {cursor: cursor, batch_size: 500}).then(function(j){
                        if (!j || !j.success) { status.textContent = '<?php echo esc_js(__('Failed.', 'ai-eshop-optimizer')); ?>'; status.dataset.tone = 'destructive'; done = true; return; }
                        var d = j.data || {};
                        total += (d.processed|0); ins += (d.inserted|0); upd += (d.updated|0); skp += (d.skipped|0);
                        if (d.done) {
                            status.textContent = '<?php echo esc_js(__('Done. Inserted', 'ai-eshop-optimizer')); ?> ' + ins + ', <?php echo esc_js(__('updated', 'ai-eshop-optimizer')); ?> ' + upd + (skp ? ', <?php echo esc_js(__('skipped', 'ai-eshop-optimizer')); ?> ' + skp : '');
                            status.dataset.tone = 'success'; done = true;
                            if (d.errors && d.errors.length) console.warn('TRS migration warnings:', d.errors);
                        } else {
                            cursor = (d.next_cursor|0);
                            setTimeout(tick, 30);
                        }
                    });
                }
                tick();
            });
        })();
        </script>
        <?php
    }
}