<?php
// admin/index.php
session_start();
require_once __DIR__ . '/../includes/db.php';

$message = '';
$error = '';

// Simple authentication
$adminPass = 'admin123';
if (isset($_POST['login_pass'])) {
    if ($_POST['login_pass'] === $adminPass) {
        $_SESSION['gasemi_admin'] = true;
    } else {
        $error = 'رمز عبور مدیریت اشتباه است.';
    }
}

if (isset($_GET['logout'])) {
    unset($_SESSION['gasemi_admin']);
    header('Location: index.php');
    exit;
}

$isLoggedIn = !empty($_SESSION['gasemi_admin']);

// Handle Actions if logged in
if ($isLoggedIn && $_SERVER['REQUEST_METHOD'] === 'POST') {
    $action = $_POST['admin_action'] ?? '';

    if ($action === 'add_tire') {
        $id = 'TR-' . (count(TireStore::getTires()) + 101);
        $name = trim($_POST['name'] ?? '');
        $brand = trim($_POST['brand'] ?? '');
        $country = trim($_POST['country'] ?? 'ایران');
        $category = trim($_POST['category'] ?? 'سواری');
        $width = intval($_POST['width'] ?? 185);
        $aspect = intval($_POST['aspect_ratio'] ?? 65);
        $rim = intval($_POST['rim'] ?? 14);
        $speed = trim($_POST['speed_index'] ?? 'H (210 km/h)');
        $load = trim($_POST['load_index'] ?? '86 (530 kg)');
        $price = intval($_POST['price'] ?? 0);
        $stock = intval($_POST['stock'] ?? 10);
        $warranty = intval($_POST['warranty_months'] ?? 36);
        $vehicles = array_filter(array_map('trim', explode(',', $_POST['vehicles'] ?? '')));
        $desc = trim($_POST['description'] ?? '');

        if ($name && $brand && $price > 0) {
            $newTire = [
                "id" => $id,
                "name" => $name,
                "brand" => $brand,
                "country" => $country,
                "category" => $category,
                "width" => $width,
                "aspect_ratio" => $aspect,
                "rim" => $rim,
                "size_str" => "{$width}/{$aspect}R{$rim}",
                "speed_index" => $speed,
                "load_index" => $load,
                "season" => "four_season",
                "season_fa" => "چهار فصل",
                "warranty_months" => $warranty,
                "production_year" => "2026",
                "fuel_efficiency" => "B",
                "wet_grip" => "A",
                "noise_level" => "69 dB",
                "price" => $price,
                "discount_percent" => 0,
                "stock" => $stock,
                "rating" => 5.0,
                "reviews_count" => 1,
                "vehicles" => $vehicles,
                "description" => $desc,
                "features" => ["تولید سال ۲۰۲۶ با گارانتی شرکتی", "ترکیب سیلیکایی با دوام بالا"],
                "image" => "assets/images/tire_barez_p648.svg",
                "is_featured" => false,
                "is_best_seller" => false
            ];
            TireStore::addTire($newTire);
            $message = 'تایر جدید با موفقیت به انبار و کاتالوگ اضافه گردید.';
        } else {
            $error = 'لطفاً تمامی فیلدهای الزامی را پر کنید.';
        }
    }

    if ($action === 'quick_update_tire') {
        $id = $_POST['tire_id'] ?? '';
        $price = intval($_POST['price'] ?? 0);
        $stock = intval($_POST['stock'] ?? 0);
        $discount = intval($_POST['discount_percent'] ?? 0);

        if ($id && $price > 0) {
            TireStore::updateTire($id, [
                "price" => $price,
                "stock" => $stock,
                "discount_percent" => $discount
            ]);
            $message = "مشخصات تایر {$id} با موفقیت به‌روزرسانی شد.";
        }
    }

    if ($action === 'delete_tire') {
        $delId = $_POST['tire_id'] ?? '';
        if ($delId) {
            TireStore::deleteTire($delId);
            $message = "تایر با شناسه {$delId} حذف گردید.";
        }
    }

    if ($action === 'update_consultation') {
        $cId = $_POST['consultation_id'] ?? '';
        $cStatus = $_POST['status'] ?? 'جدید';
        $cNote = trim($_POST['admin_note'] ?? '');
        if ($cId) {
            TireStore::updateConsultationStatus($cId, $cStatus, $cNote);
            $message = "وضعیت استعلام {$cId} به‌روز شد.";
        }
    }

    if ($action === 'delete_consultation') {
        $cId = $_POST['consultation_id'] ?? '';
        if ($cId) {
            TireStore::deleteConsultation($cId);
            $message = "درخواست مشاوره حذف گردید.";
        }
    }

    if ($action === 'update_settings') {
        $sitePhone = trim($_POST['site_phone'] ?? '');
        $emergencyPhone = trim($_POST['emergency_phone'] ?? '');
        $announcement = trim($_POST['announcement'] ?? '');
        $centralAddress = trim($_POST['central_address'] ?? '');

        TireStore::updateSettings([
            "site_phone" => $sitePhone,
            "emergency_phone" => $emergencyPhone,
            "announcement" => $announcement,
            "central_address" => $centralAddress
        ]);
        $message = "تنظیمات و اطلاعات تماس فروشگاه ذخیره گردید.";
    }
}

$tires = TireStore::getTires();
$consultations = TireStore::getConsultations();
$settings = TireStore::getSettings();

// Inventory calculations
$totalStockCount = array_sum(array_column($tires, 'stock'));
$totalInventoryValue = 0;
foreach ($tires as $t) {
    $totalInventoryValue += ($t['price'] * $t['stock']);
}

// Brand distribution
$brandCounts = [];
foreach ($tires as $t) {
    $b = $t['brand'];
    $brandCounts[$b] = ($brandCounts[$b] ?? 0) + $t['stock'];
}
?>
<!DOCTYPE html>
<html lang="fa" dir="rtl" class="dark">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>پنل مدیریت هوشمند و انبارداری | تایر قاسمی</title>
    <link href="https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;600;700;800;900&display=swap" rel="stylesheet">
    <script src="https://cdn.tailwindcss.com"></script>
    <script src="https://unpkg.com/lucide@latest"></script>
    <style>
        * { font-family: 'Vazirmatn', sans-serif; scroll-behavior: smooth; }
        .glass-card {
            background: rgba(17, 24, 39, 0.9);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
    </style>
</head>
<body class="bg-[#090d16] text-slate-100 min-h-screen">

    <?php if (!$isLoggedIn): ?>
        <!-- Login Modal / Card -->
        <div class="min-h-screen flex items-center justify-center p-4">
            <div class="glass-card rounded-3xl p-8 max-w-md w-full border border-slate-800 shadow-2xl space-y-6 text-center">
                <div class="w-14 h-14 rounded-2xl bg-gradient-to-br from-rose-600 to-amber-600 mx-auto flex items-center justify-center text-white shadow-xl shadow-rose-900/40">
                    <i data-lucide="lock" class="w-7 h-7"></i>
                </div>
                <div>
                    <h2 class="text-xl font-black text-white">ورود به پنل مدیریت تایر قاسمی</h2>
                    <p class="text-xs text-slate-400 mt-1">جهت دسترسی به انبار، قیمت‌ها و استعلام‌ها رمز عبور را وارد کنید.</p>
                </div>

                <?php if ($error): ?>
                    <div class="p-3 rounded-xl bg-rose-500/20 border border-rose-500/30 text-rose-300 text-xs font-bold">
                        <?= htmlspecialchars($error) ?>
                    </div>
                <?php endif; ?>

                <form method="POST" class="space-y-4">
                    <div class="text-right">
                        <label class="block text-xs font-bold text-slate-300 mb-1.5">رمز عبور ادمین:</label>
                        <input type="password" name="login_pass" value="admin123" required class="w-full bg-slate-950 border border-slate-800 rounded-xl px-4 py-3 text-sm text-white focus:outline-none focus:border-rose-500 text-center font-mono">
                        <span class="text-[10px] text-slate-500 mt-1 block text-center">رمز پیش‌فرض سیستم: <code class="text-amber-400 font-mono">admin123</code></span>
                    </div>

                    <button type="submit" class="w-full py-3 rounded-xl bg-gradient-to-r from-rose-600 to-amber-600 hover:from-rose-500 hover:to-amber-500 text-white font-bold text-sm shadow-lg shadow-rose-600/30 transition-all">
                        ورود به داشبورد
                    </button>
                </form>

                <div class="pt-4 border-t border-slate-800">
                    <a href="../index.php" class="text-xs text-slate-400 hover:text-white flex items-center justify-center gap-1.5">
                        <i data-lucide="arrow-right" class="w-3.5 h-3.5"></i> بازگشت به وب‌سایت اصلی
                    </a>
                </div>
            </div>
        </div>
    <?php else: ?>

        <!-- Logged In Admin Layout -->
        <div class="min-h-screen flex flex-col">
            
            <!-- Top Navbar -->
            <header class="border-b border-slate-800 bg-slate-900/90 sticky top-0 z-40 backdrop-blur">
                <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-3.5 flex items-center justify-between">
                    <div class="flex items-center gap-3">
                        <div class="w-10 h-10 rounded-xl bg-rose-600 flex items-center justify-center text-white shadow-lg shadow-rose-900/40">
                            <i data-lucide="shield-check" class="w-6 h-6"></i>
                        </div>
                        <div>
                            <div class="flex items-center gap-2">
                                <h1 class="text-base font-black text-white">سامانه مدیریت تایر قاسمی</h1>
                                <span class="px-2 py-0.5 rounded-full bg-emerald-500/20 text-emerald-400 text-[10px] font-bold">ادمین فعال</span>
                            </div>
                            <p class="text-[11px] text-slate-400">انبارداری، استعلام‌ها، قیمت‌گذاری و تنظیمات</p>
                        </div>
                    </div>

                    <div class="flex items-center gap-3">
                        <a href="../api.php?action=export_backup" class="hidden sm:inline-flex items-center gap-1.5 px-3 py-1.5 rounded-xl bg-slate-800 hover:bg-slate-700 text-slate-300 text-xs font-bold border border-slate-700 transition-colors" title="دانلود نسخه پشتیبان">
                            <i data-lucide="download" class="w-3.5 h-3.5 text-cyan-400"></i>
                            پشتیبان‌گیری JSON
                        </a>

                        <a href="../index.php" target="_blank" class="px-3.5 py-1.5 rounded-xl bg-slate-800 hover:bg-slate-700 text-xs font-bold text-slate-200 flex items-center gap-1.5 border border-slate-700">
                            <i data-lucide="external-link" class="w-3.5 h-3.5"></i>
                            نمایش سایت
                        </a>

                        <a href="?logout=1" class="px-3 py-1.5 rounded-xl bg-rose-600/20 hover:bg-rose-600 text-rose-300 hover:text-white text-xs font-bold transition-colors flex items-center gap-1">
                            <i data-lucide="log-out" class="w-3.5 h-3.5"></i>
                            خروج
                        </a>
                    </div>
                </div>

                <!-- Navigation Tabs Bar -->
                <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 flex items-center gap-2 overflow-x-auto text-xs font-bold py-2 border-t border-slate-800/80">
                    <button onclick="switchAdminTab('dashboard')" id="btn-tab-dashboard" class="tab-btn px-4 py-2 rounded-xl bg-rose-600 text-white flex items-center gap-2 transition-all">
                        <i data-lucide="layout-dashboard" class="w-4 h-4"></i> داشبورد و آمار
                    </button>
                    <button onclick="switchAdminTab('tires')" id="btn-tab-tires" class="tab-btn px-4 py-2 rounded-xl text-slate-400 hover:text-white flex items-center gap-2 transition-all">
                        <i data-lucide="disc-3" class="w-4 h-4"></i> مدیریت انبار تایرها (<?= count($tires) ?>)
                    </button>
                    <button onclick="switchAdminTab('leads')" id="btn-tab-leads" class="tab-btn px-4 py-2 rounded-xl text-slate-400 hover:text-white flex items-center gap-2 transition-all">
                        <i data-lucide="headset" class="w-4 h-4"></i> استعلام‌ها و لیدها (<?= count($consultations) ?>)
                    </button>
                    <button onclick="switchAdminTab('settings')" id="btn-tab-settings" class="tab-btn px-4 py-2 rounded-xl text-slate-400 hover:text-white flex items-center gap-2 transition-all">
                        <i data-lucide="sliders" class="w-4 h-4"></i> تنظیمات سایت و شعب
                    </button>
                </div>
            </header>

            <main class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8 space-y-8 flex-1 w-full">
                
                <?php if ($message): ?>
                    <div class="p-4 rounded-2xl bg-emerald-500/20 border border-emerald-500/30 text-emerald-300 text-xs font-bold flex items-center gap-2">
                        <i data-lucide="check-circle" class="w-4 h-4"></i> <?= htmlspecialchars($message) ?>
                    </div>
                <?php endif; ?>

                <?php if ($error): ?>
                    <div class="p-4 rounded-2xl bg-rose-500/20 border border-rose-500/30 text-rose-300 text-xs font-bold flex items-center gap-2">
                        <i data-lucide="alert-circle" class="w-4 h-4"></i> <?= htmlspecialchars($error) ?>
                    </div>
                <?php endif; ?>

                <!-- TAB 1: DASHBOARD & OVERVIEW -->
                <div id="tab-dashboard" class="space-y-8">
                    
                    <!-- KPI Cards -->
                    <div class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-5">
                        
                        <div class="glass-card p-6 rounded-3xl border border-slate-800 relative overflow-hidden">
                            <div class="flex items-center justify-between">
                                <span class="text-xs font-bold text-slate-400">تنوع مدل‌های تایر</span>
                                <div class="w-10 h-10 rounded-xl bg-blue-500/20 text-blue-400 flex items-center justify-center">
                                    <i data-lucide="layers" class="w-5 h-5"></i>
                                </div>
                            </div>
                            <div class="text-3xl font-black text-white mt-3"><?= count($tires) ?> <span class="text-xs text-slate-400 font-normal">مدل فعال</span></div>
                            <div class="text-[11px] text-emerald-400 mt-2 flex items-center gap-1">
                                <i data-lucide="check" class="w-3.5 h-3.5"></i> ۱۰۰٪ کاتالوگ آنلاین
                            </div>
                        </div>

                        <div class="glass-card p-6 rounded-3xl border border-slate-800 relative overflow-hidden">
                            <div class="flex items-center justify-between">
                                <span class="text-xs font-bold text-slate-400">کل موجودی انبار</span>
                                <div class="w-10 h-10 rounded-xl bg-amber-500/20 text-amber-400 flex items-center justify-center">
                                    <i data-lucide="package" class="w-5 h-5"></i>
                                </div>
                            </div>
                            <div class="text-3xl font-black text-amber-400 mt-3"><?= number_format($totalStockCount) ?> <span class="text-xs text-slate-400 font-normal">حلقه</span></div>
                            <div class="text-[11px] text-slate-400 mt-2">میانگین <?= round($totalStockCount / max(count($tires), 1)) ?> حلقه به ازای هر مدل</div>
                        </div>

                        <div class="glass-card p-6 rounded-3xl border border-slate-800 relative overflow-hidden">
                            <div class="flex items-center justify-between">
                                <span class="text-xs font-bold text-slate-400">ارزش کل موجودی انبار</span>
                                <div class="w-10 h-10 rounded-xl bg-emerald-500/20 text-emerald-400 flex items-center justify-center">
                                    <i data-lucide="banknote" class="w-5 h-5"></i>
                                </div>
                            </div>
                            <div class="text-2xl font-black text-emerald-400 mt-3"><?= number_format($totalInventoryValue / 10000000) ?> <span class="text-xs text-slate-400 font-normal">میلیون تومان</span></div>
                            <div class="text-[11px] text-slate-400 mt-2"><?= number_format($totalInventoryValue) ?> تومان</div>
                        </div>

                        <div class="glass-card p-6 rounded-3xl border border-slate-800 relative overflow-hidden">
                            <div class="flex items-center justify-between">
                                <span class="text-xs font-bold text-slate-400">درخواست‌های مشاوره</span>
                                <div class="w-10 h-10 rounded-xl bg-rose-500/20 text-rose-400 flex items-center justify-center">
                                    <i data-lucide="phone-call" class="w-5 h-5"></i>
                                </div>
                            </div>
                            <div class="text-3xl font-black text-rose-400 mt-3"><?= count($consultations) ?> <span class="text-xs text-slate-400 font-normal">لید دریافتی</span></div>
                            <div class="text-[11px] text-slate-400 mt-2">نیازمند پیگیری تلفنی</div>
                        </div>

                    </div>

                    <!-- Distribution Charts & Quick Leads Grid -->
                    <div class="grid grid-cols-1 lg:grid-cols-12 gap-8">
                        
                        <!-- Left: Brand Inventory Share -->
                        <div class="lg:col-span-6 glass-card p-6 rounded-3xl border border-slate-800 space-y-4">
                            <h3 class="text-base font-black text-white flex items-center gap-2">
                                <i data-lucide="pie-chart" class="w-5 h-5 text-amber-400"></i>
                                سهم موجودی انبار بر اساس برند
                            </h3>

                            <div class="space-y-3 pt-2">
                                <?php foreach ($brandCounts as $bName => $bCount): 
                                    $pct = $totalStockCount > 0 ? round(($bCount / $totalStockCount) * 100) : 0;
                                ?>
                                    <div>
                                        <div class="flex justify-between text-xs mb-1">
                                            <span class="font-bold text-white"><?= htmlspecialchars($bName) ?></span>
                                            <span class="text-slate-400 font-mono"><?= $bCount ?> حلقه (<?= $pct ?>%)</span>
                                        </div>
                                        <div class="w-full bg-slate-950 h-2 rounded-full overflow-hidden">
                                            <div class="bg-gradient-to-r from-rose-600 to-amber-500 h-full rounded-full" style="width: <?= $pct ?>%;"></div>
                                        </div>
                                    </div>
                                <?php endforeach; ?>
                            </div>
                        </div>

                        <!-- Right: Urgent Inquiries -->
                        <div class="lg:col-span-6 glass-card p-6 rounded-3xl border border-slate-800 space-y-4">
                            <div class="flex items-center justify-between">
                                <h3 class="text-base font-black text-white flex items-center gap-2">
                                    <i data-lucide="bell" class="w-5 h-5 text-rose-400"></i>
                                    آخرین استعلام‌ها جهت پیگیری
                                </h3>
                                <button onclick="switchAdminTab('leads')" class="text-xs text-rose-400 font-bold hover:underline">مشاهده همه</button>
                            </div>

                            <div class="space-y-3">
                                <?php foreach (array_slice(array_reverse($consultations), 0, 4) as $c): ?>
                                    <div class="p-3.5 rounded-2xl bg-slate-950 border border-slate-800 flex items-center justify-between gap-3">
                                        <div>
                                            <div class="text-xs font-bold text-white"><?= htmlspecialchars($c['name']) ?> <span class="text-slate-400 font-normal">(<?= htmlspecialchars($c['car'] ?: 'نامشخص') ?>)</span></div>
                                            <div class="text-[11px] text-slate-400 font-mono mt-0.5"><?= htmlspecialchars($c['phone']) ?> • <?= $c['created_at'] ?></div>
                                        </div>
                                        <a href="tel:<?= htmlspecialchars($c['phone']) ?>" class="px-3 py-1.5 rounded-xl bg-rose-600 hover:bg-rose-500 text-white text-xs font-bold flex items-center gap-1">
                                            <i data-lucide="phone" class="w-3.5 h-3.5"></i> تماس
                                        </a>
                                    </div>
                                <?php endforeach; ?>
                            </div>
                        </div>

                    </div>

                </div>

                <!-- TAB 2: TIRES & INVENTORY MANAGEMENT -->
                <div id="tab-tires" class="hidden space-y-8">
                    
                    <!-- Add Tire Form -->
                    <div class="glass-card p-6 rounded-3xl border border-slate-800 space-y-4">
                        <div class="flex items-center justify-between pb-3 border-b border-slate-800">
                            <h2 class="text-base font-black text-white flex items-center gap-2">
                                <i data-lucide="plus-circle" class="w-5 h-5 text-emerald-400"></i>
                                ثبت تایر جدید در کاتالوگ و انبار
                            </h2>
                        </div>

                        <form method="POST" class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-4 text-xs">
                            <input type="hidden" name="admin_action" value="add_tire">

                            <div>
                                <label class="block font-bold text-slate-300 mb-1">نام کامل مدل تایر *</label>
                                <input type="text" name="name" required placeholder="مثلاً: هانکوک K127 اسپرت" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2.5 text-white focus:outline-none focus:border-rose-500">
                            </div>

                            <div>
                                <label class="block font-bold text-slate-300 mb-1">برند سازنده *</label>
                                <input type="text" name="brand" required placeholder="بارز، کویر، میشلن..." class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2.5 text-white focus:outline-none focus:border-rose-500">
                            </div>

                            <div>
                                <label class="block font-bold text-slate-300 mb-1">کشور سازنده</label>
                                <input type="text" name="country" placeholder="ایران، کره جنوبی، آلمان..." class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2.5 text-white focus:outline-none focus:border-rose-500">
                            </div>

                            <div>
                                <label class="block font-bold text-slate-300 mb-1">دسته‌بندی</label>
                                <select name="category" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2.5 text-white focus:outline-none focus:border-rose-500">
                                    <option value="سواری">سواری شهری</option>
                                    <option value="اسپرت">اسپرت و ریسینگ</option>
                                    <option value="شاسی بلند و آفرود (SUV/4x4)">شاسی بلند و آفرود (SUV/4x4)</option>
                                    <option value="لوکس و پرمیوم">لوکس و پرمیوم</option>
                                </select>
                            </div>

                            <div>
                                <label class="block font-bold text-slate-300 mb-1">پهنا (mm)</label>
                                <input type="number" name="width" value="205" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2 text-white">
                            </div>

                            <div>
                                <label class="block font-bold text-slate-300 mb-1">نسبت فاق (%)</label>
                                <input type="number" name="aspect_ratio" value="55" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2 text-white">
                            </div>

                            <div>
                                <label class="block font-bold text-slate-300 mb-1">قطر رینگ (اینچ)</label>
                                <input type="number" name="rim" value="16" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2 text-white">
                            </div>

                            <div>
                                <label class="block font-bold text-slate-300 mb-1">قیمت هر حلقه (تومان) *</label>
                                <input type="number" name="price" required placeholder="6800000" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2 text-white">
                            </div>

                            <div>
                                <label class="block font-bold text-slate-300 mb-1">موجودی انبار (حلقه)</label>
                                <input type="number" name="stock" value="16" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2 text-white">
                            </div>

                            <div>
                                <label class="block font-bold text-slate-300 mb-1">مدت گارانتی (ماه)</label>
                                <input type="number" name="warranty_months" value="36" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2 text-white">
                            </div>

                            <div class="sm:col-span-2">
                                <label class="block font-bold text-slate-300 mb-1">خودروهای سازگار (با کاما جدا کنید)</label>
                                <input type="text" name="vehicles" placeholder="دنا پلاس, تارا, شاهین, سراتو" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2 text-white">
                            </div>

                            <div class="sm:col-span-4">
                                <label class="block font-bold text-slate-300 mb-1">توضیحات و مشخصات کاربردی</label>
                                <input type="text" name="description" placeholder="تایر نرم، چسبندگی فوق‌العاده در بارندگی با طول عمر بالا..." class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2 text-white">
                            </div>

                            <div class="sm:col-span-4 pt-2">
                                <button type="submit" class="px-6 py-2.5 rounded-xl bg-emerald-600 hover:bg-emerald-500 text-white font-bold transition-all shadow">
                                    افزودن تایر به انبار
                                </button>
                            </div>
                        </form>
                    </div>

                    <!-- Inventory Table -->
                    <div class="glass-card p-6 rounded-3xl border border-slate-800 space-y-4">
                        <div class="flex flex-col sm:flex-row sm:items-center justify-between gap-4">
                            <h2 class="text-base font-black text-white flex items-center gap-2">
                                <i data-lucide="database" class="w-5 h-5 text-amber-400"></i>
                                لیست و ویرایش سریع موجودی و قیمت تایرها
                            </h2>
                            
                            <div class="relative max-w-xs w-full">
                                <i data-lucide="search" class="w-4 h-4 text-slate-400 absolute right-3 top-3"></i>
                                <input type="text" id="admin-tire-search" oninput="filterAdminTires()" placeholder="جستجوی مدل یا برند..." class="w-full bg-slate-950 border border-slate-800 rounded-xl pr-9 pl-3 py-2 text-xs text-white focus:outline-none focus:border-rose-500">
                            </div>
                        </div>

                        <div class="overflow-x-auto">
                            <table class="w-full text-right text-xs" id="admin-tires-table">
                                <thead>
                                    <tr class="border-b border-slate-800 text-slate-400">
                                        <th class="p-3">کد تایر</th>
                                        <th class="p-3">تصویر</th>
                                        <th class="p-3">نام و مدل تایر</th>
                                        <th class="p-3">سایز</th>
                                        <th class="p-3">قیمت مصوب (تومان)</th>
                                        <th class="p-3">موجودی</th>
                                        <th class="p-3">تخفیف %</th>
                                        <th class="p-3 text-center">عملیات</th>
                                    </tr>
                                </thead>
                                <tbody class="divide-y divide-slate-800/60 text-slate-200">
                                    <?php foreach ($tires as $t): ?>
                                        <tr class="admin-tire-row hover:bg-slate-800/30">
                                            <td class="p-3 font-mono text-slate-400"><?= $t['id'] ?></td>
                                            <td class="p-3">
                                                <img src="../<?= htmlspecialchars($t['image']) ?>" alt="<?= htmlspecialchars($t['name']) ?>" class="w-10 h-10 object-contain">
                                            </td>
                                            <td class="p-3 font-bold text-white">
                                                <div><?= htmlspecialchars($t['name']) ?></div>
                                                <span class="text-[10px] text-rose-400 font-normal"><?= htmlspecialchars($t['brand']) ?> (<?= $t['country'] ?>)</span>
                                            </td>
                                            <td class="p-3"><span class="px-2 py-0.5 rounded bg-slate-950 font-bold"><?= $t['size_str'] ?></span></td>
                                            
                                            <!-- Inline Quick Update Form -->
                                            <form method="POST">
                                                <input type="hidden" name="admin_action" value="quick_update_tire">
                                                <input type="hidden" name="tire_id" value="<?= $t['id'] ?>">
                                                
                                                <td class="p-3">
                                                    <input type="number" name="price" value="<?= $t['price'] ?>" class="w-28 bg-slate-950 border border-slate-800 rounded-lg px-2 py-1 text-white font-mono text-xs">
                                                </td>
                                                <td class="p-3">
                                                    <input type="number" name="stock" value="<?= $t['stock'] ?>" class="w-16 bg-slate-950 border border-slate-800 rounded-lg px-2 py-1 text-white font-mono text-xs">
                                                </td>
                                                <td class="p-3">
                                                    <input type="number" name="discount_percent" value="<?= $t['discount_percent'] ?? 0 ?>" class="w-14 bg-slate-950 border border-slate-800 rounded-lg px-2 py-1 text-white font-mono text-xs">
                                                </td>
                                                <td class="p-3 text-center flex items-center justify-center gap-1.5">
                                                    <button type="submit" class="p-1.5 rounded-lg bg-emerald-600/20 hover:bg-emerald-600 text-emerald-300 hover:text-white transition-colors" title="ذخیره تغییرات">
                                                        <i data-lucide="check" class="w-4 h-4"></i>
                                                    </button>
                                            </form>
                                                    <form method="POST" onsubmit="return confirm('آیا از حذف این تایر مطمئن هستید؟');" class="inline">
                                                        <input type="hidden" name="admin_action" value="delete_tire">
                                                        <input type="hidden" name="tire_id" value="<?= $t['id'] ?>">
                                                        <button type="submit" class="p-1.5 rounded-lg bg-rose-500/10 hover:bg-rose-500/30 text-rose-400 transition-colors" title="حذف تایر">
                                                            <i data-lucide="trash-2" class="w-4 h-4"></i>
                                                        </button>
                                                    </form>
                                                </td>
                                        </tr>
                                    <?php endforeach; ?>
                                </tbody>
                            </table>
                        </div>
                    </div>

                </div>

                <!-- TAB 3: LEADS & INQUIRIES -->
                <div id="tab-leads" class="hidden space-y-8">
                    
                    <div class="glass-card p-6 rounded-3xl border border-slate-800 space-y-4">
                        <div class="flex items-center justify-between pb-3 border-b border-slate-800">
                            <h2 class="text-base font-black text-white flex items-center gap-2">
                                <i data-lucide="headset" class="w-5 h-5 text-rose-400"></i>
                                مدیریت و پیگیری درخواست‌های مشاوره و خرید مشتریان
                            </h2>
                            <span class="text-xs text-slate-400 font-bold"><?= count($consultations) ?> استعلام ثبت‌شده</span>
                        </div>

                        <div class="overflow-x-auto">
                            <table class="w-full text-right text-xs">
                                <thead>
                                    <tr class="border-b border-slate-800 text-slate-400">
                                        <th class="p-3">کد</th>
                                        <th class="p-3">نام متقاضی</th>
                                        <th class="p-3">شماره تماس</th>
                                        <th class="p-3">خودرو</th>
                                        <th class="p-3">پیام مشتری</th>
                                        <th class="p-3">تاریخ ثبت</th>
                                        <th class="p-3">وضعیت پیگیری</th>
                                        <th class="p-3">یادداشت مدیر</th>
                                        <th class="p-3 text-center">عملیات</th>
                                    </tr>
                                </thead>
                                <tbody class="divide-y divide-slate-800/60 text-slate-200">
                                    <?php foreach (array_reverse($consultations) as $c): ?>
                                        <tr class="hover:bg-slate-800/30">
                                            <td class="p-3 font-mono text-slate-400"><?= $c['id'] ?></td>
                                            <td class="p-3 font-bold text-white"><?= htmlspecialchars($c['name']) ?></td>
                                            <td class="p-3">
                                                <a href="tel:<?= htmlspecialchars($c['phone']) ?>" class="font-mono text-rose-400 font-bold hover:underline flex items-center gap-1">
                                                    <i data-lucide="phone" class="w-3.5 h-3.5"></i> <?= htmlspecialchars($c['phone']) ?>
                                                </a>
                                            </td>
                                            <td class="p-3 text-slate-300"><?= htmlspecialchars($c['car'] ?: '-') ?></td>
                                            <td class="p-3 text-slate-400 max-w-xs"><?= htmlspecialchars($c['message'] ?: '-') ?></td>
                                            <td class="p-3 text-slate-500 font-mono"><?= htmlspecialchars($c['created_at']) ?></td>
                                            
                                            <form method="POST">
                                                <input type="hidden" name="admin_action" value="update_consultation">
                                                <input type="hidden" name="consultation_id" value="<?= $c['id'] ?>">
                                                
                                                <td class="p-3">
                                                    <select name="status" class="bg-slate-950 border border-slate-800 rounded-lg px-2 py-1 text-xs text-white">
                                                        <option value="جدید" <?= ($c['status'] ?? '') === 'جدید' ? 'selected' : '' ?>>جدید</option>
                                                        <option value="در حال پیگیری" <?= ($c['status'] ?? '') === 'در حال پیگیری' ? 'selected' : '' ?>>در حال پیگیری</option>
                                                        <option value="تماس گرفته شد" <?= ($c['status'] ?? '') === 'تماس گرفته شد' ? 'selected' : '' ?>>تماس گرفته شد</option>
                                                        <option value="سفارش نهایی شد" <?= ($c['status'] ?? '') === 'سفارش نهایی شد' ? 'selected' : '' ?>>سفارش نهایی شد</option>
                                                        <option value="لغو شده" <?= ($c['status'] ?? '') === 'لغو شده' ? 'selected' : '' ?>>لغو شده</option>
                                                    </select>
                                                </td>
                                                
                                                <td class="p-3">
                                                    <input type="text" name="admin_note" value="<?= htmlspecialchars($c['admin_note'] ?? '') ?>" placeholder="یادداشت کارشناس..." class="bg-slate-950 border border-slate-800 rounded-lg px-2 py-1 text-xs text-slate-300 w-36">
                                                </td>

                                                <td class="p-3 text-center flex items-center justify-center gap-1.5">
                                                    <button type="submit" class="p-1.5 rounded-lg bg-emerald-600/20 hover:bg-emerald-600 text-emerald-300 hover:text-white transition-colors" title="ذخیره وضعیت">
                                                        <i data-lucide="save" class="w-4 h-4"></i>
                                                    </button>
                                            </form>
                                                    <form method="POST" onsubmit="return confirm('آیا از حذف این درخواست مطمئن هستید؟');" class="inline">
                                                        <input type="hidden" name="admin_action" value="delete_consultation">
                                                        <input type="hidden" name="consultation_id" value="<?= $c['id'] ?>">
                                                        <button type="submit" class="p-1.5 rounded-lg bg-rose-500/10 hover:bg-rose-500/30 text-rose-400 transition-colors" title="حذف">
                                                            <i data-lucide="trash-2" class="w-4 h-4"></i>
                                                        </button>
                                                    </form>
                                                </td>
                                        </tr>
                                    <?php endforeach; ?>
                                </tbody>
                            </table>
                        </div>
                    </div>

                </div>

                <!-- TAB 4: SETTINGS -->
                <div id="tab-settings" class="hidden space-y-8">
                    
                    <div class="glass-card p-6 sm:p-8 rounded-3xl border border-slate-800 space-y-6">
                        <h2 class="text-base font-black text-white flex items-center gap-2">
                            <i data-lucide="settings" class="w-5 h-5 text-amber-400"></i>
                            تنظیمات عمومی، تلفن‌ها و شعب فروشگاه تایر قاسمی
                        </h2>

                        <form method="POST" class="space-y-4 text-xs">
                            <input type="hidden" name="admin_action" value="update_settings">

                            <div class="grid grid-cols-1 sm:grid-cols-2 gap-4">
                                <div>
                                    <label class="block font-bold text-slate-300 mb-1">شماره تلفن ثابت فروشگاه</label>
                                    <input type="text" name="site_phone" value="<?= htmlspecialchars($settings['site_phone'] ?? '021-88889900') ?>" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2.5 text-white font-mono text-left">
                                </div>
                                <div>
                                    <label class="block font-bold text-slate-300 mb-1">شماره تماس اضطراری و امداد سیار</label>
                                    <input type="text" name="emergency_phone" value="<?= htmlspecialchars($settings['emergency_phone'] ?? '09123456789') ?>" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2.5 text-white font-mono text-left">
                                </div>
                            </div>

                            <div>
                                <label class="block font-bold text-slate-300 mb-1">متن بنر اعلان بالای صفحه (Top Banner)</label>
                                <input type="text" name="announcement" value="<?= htmlspecialchars($settings['announcement'] ?? 'تضمین اصالت کالا و گارانتی معتبر شرکتی تا ۶۰ ماه') ?>" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2.5 text-white">
                            </div>

                            <div>
                                <label class="block font-bold text-slate-300 mb-1">آدرس شعبه مرکزی</label>
                                <input type="text" name="central_address" value="<?= htmlspecialchars($settings['central_address'] ?? 'تهران، خیابان آزادی، تقاطع یادگار امام، مجتمع خدمات خودرویی تایر قاسمی') ?>" class="w-full bg-slate-950 border border-slate-800 rounded-xl px-3 py-2.5 text-white">
                            </div>

                            <div class="pt-2">
                                <button type="submit" class="px-6 py-2.5 rounded-xl bg-rose-600 hover:bg-rose-500 text-white font-bold transition-all shadow">
                                    ذخیره تنظیمات
                                </button>
                            </div>
                        </form>
                    </div>

                </div>

            </main>

            <!-- Admin Footer -->
            <footer class="border-t border-slate-800/80 bg-slate-950 py-4 px-4 text-center text-xs text-slate-500">
                سامانه مدیریت یکپارچه تایر قاسمی • نسخه ۲.۰ • سرور پایدار PHP 8
            </footer>

        </div>

    <?php endif; ?>

    <script>
        lucide.createIcons();

        function switchAdminTab(tab) {
            ['dashboard', 'tires', 'leads', 'settings'].forEach(t => {
                const el = document.getElementById('tab-' + t);
                const btn = document.getElementById('btn-tab-' + t);
                if (el) el.classList.add('hidden');
                if (btn) {
                    btn.className = 'tab-btn px-4 py-2 rounded-xl text-slate-400 hover:text-white flex items-center gap-2 transition-all';
                }
            });

            const activeEl = document.getElementById('tab-' + tab);
            const activeBtn = document.getElementById('btn-tab-' + tab);
            if (activeEl) activeEl.classList.remove('hidden');
            if (activeBtn) {
                activeBtn.className = 'tab-btn px-4 py-2 rounded-xl bg-rose-600 text-white flex items-center gap-2 transition-all';
            }
        }

        function filterAdminTires() {
            const q = document.getElementById('admin-tire-search').value.toLowerCase().trim();
            const rows = document.querySelectorAll('.admin-tire-row');
            rows.forEach(r => {
                if (r.innerText.toLowerCase().includes(q)) {
                    r.classList.remove('hidden');
                } else {
                    r.classList.add('hidden');
                }
            });
        }
    </script>
</body>
</html>