<?php
header('Content-Type: application/json');
require_once __DIR__ . '/../db/config.php';

$pdo = db();
$action = $_GET['action'] ?? 'list';

try {
    if ($action === 'list') {
        $outlet_id = $_GET['outlet_id'] ?? 1;
        
        $stmt = $pdo->prepare("
            SELECT o.id, o.customer_name, o.customer_phone, o.total_amount, o.created_at, o.table_number, o.order_type,
            (SELECT COUNT(*) FROM order_items WHERE order_id = o.id) as item_count
            FROM orders o
            WHERE o.outlet_id = ? 
              AND o.status = 'pending' 
              AND (o.payment_type_id IS NULL OR o.payment_type_id = 0)
            ORDER BY o.created_at DESC
        ");
        $stmt->execute([$outlet_id]);
        $orders = $stmt->fetchAll(PDO::FETCH_ASSOC);
        
        // Format date for JS
        foreach ($orders as &$o) {
            $o['time_formatted'] = date('H:i', strtotime($o['created_at']));
        }
        
        echo json_encode(['success' => true, 'orders' => $orders]);
        exit;
    }

    if ($action === 'details') {
        $order_id = $_GET['id'] ?? null;
        if (!$order_id) {
            echo json_encode(['success' => false, 'error' => 'Missing ID']);
            exit;
        }
        
        // Fetch Order
        $stmt = $pdo->prepare("SELECT * FROM orders WHERE id = ?");
        $stmt->execute([$order_id]);
        $order = $stmt->fetch(PDO::FETCH_ASSOC);
        
        if (!$order) {
            echo json_encode(['success' => false, 'error' => 'Order not found']);
            exit;
        }
        
        // Fetch Items with is_loyalty
        $stmtItems = $pdo->prepare("
            SELECT oi.*, p.name as product_name, p.price as base_price, p.is_loyalty, v.name as variant_name, v.price_adjustment
            FROM order_items oi
            JOIN products p ON oi.product_id = p.id
            LEFT JOIN product_variants v ON oi.variant_id = v.id
            WHERE oi.order_id = ?
        ");
        $stmtItems->execute([$order_id]);
        $items = $stmtItems->fetchAll(PDO::FETCH_ASSOC);
        
        // Format items for JS cart
        $cartItems = [];
        foreach ($items as $item) {
            $cartItems[] = [
                'id' => $item['product_id'],
                'name' => $item['product_name'],
                'price' => floatval($item['unit_price']),
                'base_price' => floatval($item['base_price']),
                'quantity' => intval($item['quantity']),
                'variant_id' => $item['variant_id'],
                'variant_name' => $item['variant_name'],
                'hasVariants' => !empty($item['variant_id']),
                'is_loyalty' => intval($item['is_loyalty']) === 1
            ];
        }
        
        // Fetch Customer
        $customer = null;
        if ($order['customer_id']) {
            $cStmt = $pdo->prepare("SELECT * FROM customers WHERE id = ?");
            $cStmt->execute([$order['customer_id']]);
            $customer = $cStmt->fetch(PDO::FETCH_ASSOC);
            
            if ($customer) {
                // Fetch Loyalty Threshold for consistent frontend logic
                $settingsStmt = $pdo->query("SELECT points_for_free_meal FROM loyalty_settings WHERE id = 1");
                $loyaltySettings = $settingsStmt->fetch(PDO::FETCH_ASSOC);
                $threshold = $loyaltySettings ? intval($loyaltySettings['points_for_free_meal']) : 70;
                
                $customer['points'] = intval($customer['points']);
                $customer['eligible_for_free_meal'] = $customer['points'] >= $threshold;
                $customer['eligible_count'] = floor($customer['points'] / $threshold);
                $customer['points_needed'] = max(0, $threshold - ($customer['points'] % $threshold));
            }
        }
        
        echo json_encode([
            'success' => true, 
            'order' => $order, 
            'items' => $cartItems,
            'customer' => $customer
        ]);
        exit;
    }
} catch (Exception $e) {
    echo json_encode(['success' => false, 'error' => $e->getMessage()]);
}