diff --git a/buyer/index.php b/buyer/index.php
index d99e289..628853b 100644
--- a/buyer/index.php
+++ b/buyer/index.php
@@ -9,11 +9,11 @@ $userId = $_SESSION['user_id'];
 // Get Installments
 $installments = $pdo->prepare("
     SELECT i.*, c.brand, c.model 
-    FROM installments i 
-    JOIN sales s ON i.sale_id = s.id 
-    JOIN cars c ON s.car_id = c.id 
-    WHERE s.buyer_id = ?
-");
+        FROM installments i 
+        JOIN sales s ON i.sale_id = s.id 
+        JOIN cars c ON s.car_id = c.id 
+        WHERE s.user_id = ?
+    ");
 $installments->execute([$userId]);
 $myInstallments = $installments->fetchAll();
 ?>
diff --git a/db/setup_done.flag b/db/setup_done.flag
new file mode 100644
index 0000000..b81b144
--- /dev/null
+++ b/db/setup_done.flag
@@ -0,0 +1 @@
+2026-02-17 08:38:35
\ No newline at end of file
diff --git a/dealer/index.php b/dealer/index.php
index 8143484..4cbf9ec 100644
--- a/dealer/index.php
+++ b/dealer/index.php
@@ -11,7 +11,7 @@ $myCars = $pdo->prepare("SELECT COUNT(*) FROM cars WHERE dealer_id = ?");
 $myCars->execute([$dealerId]);
 $myCarsCount = $myCars->fetchColumn();
 
-$mySales = $pdo->prepare("SELECT COUNT(*) FROM sales WHERE seller_id = ?");
+$mySales = $pdo->prepare("SELECT COUNT(*) FROM sales s JOIN cars c ON s.car_id = c.id WHERE c.dealer_id = ?");
 $mySales->execute([$dealerId]);
 $mySalesCount = $mySales->fetchColumn();
 ?>
diff --git a/includes/header.php b/includes/header.php
index e85a448..92b64f5 100644
--- a/includes/header.php
+++ b/includes/header.php
@@ -1,6 +1,8 @@
 <?php
 declare(strict_types=1);
 require_once __DIR__ . '/../db/config.php';
+require_once __DIR__ . '/init_db.php';
+ensure_db_setup();
 require_once __DIR__ . '/auth.php'; // Ensure session is started and auth helpers are available
 
 $projectTitle = "AFG_CARS - Supreme Automotive";
diff --git a/includes/init_db.php b/includes/init_db.php
new file mode 100644
index 0000000..db4ed1e
--- /dev/null
+++ b/includes/init_db.php
@@ -0,0 +1,189 @@
+<?php
+require_once __DIR__ . '/../db/config.php';
+
+function ensure_db_setup() {
+    $flagFile = __DIR__ . '/../db/setup_done.flag';
+    if (file_exists($flagFile)) {
+        return;
+    }
+
+    try {
+        $db = db();
+        
+        // Schema Creation (IF NOT EXISTS to be safe)
+        $db->exec("SET FOREIGN_KEY_CHECKS = 0");
+        
+        // Branches
+        $db->exec("CREATE TABLE IF NOT EXISTS branches (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            name VARCHAR(100) NOT NULL,
+            city VARCHAR(100) NOT NULL,
+            address VARCHAR(255),
+            phone VARCHAR(50),
+            hours VARCHAR(100)
+        )");
+
+        // Users
+        $db->exec("CREATE TABLE IF NOT EXISTS users (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            username VARCHAR(100) UNIQUE NOT NULL,
+            email VARCHAR(100) UNIQUE,
+            password VARCHAR(255) NOT NULL,
+            role ENUM('Guest', 'Customer', 'Dealer', 'Employee', 'Manager', 'Admin', 'Super Admin') DEFAULT 'Customer',
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+        )");
+
+        // Cars
+        $db->exec("CREATE TABLE IF NOT EXISTS cars (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            vin VARCHAR(50) UNIQUE NOT NULL,
+            brand VARCHAR(100) NOT NULL,
+            model VARCHAR(100) NOT NULL,
+            year INT NOT NULL,
+            price DECIMAL(15, 2) NOT NULL,
+            mileage INT NOT NULL,
+            transmission VARCHAR(50),
+            fuel_type VARCHAR(50),
+            status ENUM('Available', 'Reserved', 'Sold') DEFAULT 'Available',
+            branch_id INT,
+            dealer_id INT DEFAULT NULL,
+            installment_available BOOLEAN DEFAULT 0,
+            is_featured BOOLEAN DEFAULT 0,
+            image_url VARCHAR(255),
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (branch_id) REFERENCES branches(id),
+            FOREIGN KEY (dealer_id) REFERENCES users(id)
+        )");
+
+        // Car Images
+        $db->exec("CREATE TABLE IF NOT EXISTS car_images (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            car_id INT NOT NULL,
+            image_path VARCHAR(255) NOT NULL,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (car_id) REFERENCES cars(id) ON DELETE CASCADE
+        )");
+
+        // Reviews
+        $db->exec("CREATE TABLE IF NOT EXISTS reviews (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            car_id INT NOT NULL,
+            user_id INT NOT NULL,
+            rating INT NOT NULL CHECK (rating >= 1 AND rating <= 5),
+            comment TEXT,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (car_id) REFERENCES cars(id) ON DELETE CASCADE,
+            FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+        )");
+
+        // Sales
+        $db->exec("CREATE TABLE IF NOT EXISTS sales (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            user_id INT NOT NULL,
+            car_id INT NOT NULL,
+            amount DECIMAL(15, 2) NOT NULL,
+            sale_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            status ENUM('Pending', 'Completed', 'Cancelled') DEFAULT 'Pending',
+            FOREIGN KEY (user_id) REFERENCES users(id),
+            FOREIGN KEY (car_id) REFERENCES cars(id)
+        )");
+
+        // Installments
+        $db->exec("CREATE TABLE IF NOT EXISTS installments (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            sale_id INT NOT NULL,
+            total_amount DECIMAL(15, 2) NOT NULL,
+            paid_amount DECIMAL(15, 2) DEFAULT 0,
+            monthly_payment DECIMAL(15, 2) NOT NULL,
+            status ENUM('Active', 'Completed', 'Overdue') DEFAULT 'Active',
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (sale_id) REFERENCES sales(id) ON DELETE CASCADE
+        )");
+
+        // Activity Logs
+        $db->exec("CREATE TABLE IF NOT EXISTS activity_logs (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            user_id INT,
+            action VARCHAR(255) NOT NULL,
+            ip_address VARCHAR(50),
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE SET NULL
+        )");
+
+        // Notifications
+        $db->exec("CREATE TABLE IF NOT EXISTS notifications (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            user_id INT NOT NULL,
+            message TEXT NOT NULL,
+            is_read BOOLEAN DEFAULT 0,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+        )");
+
+        $db->exec("SET FOREIGN_KEY_CHECKS = 1");
+
+        // Seeding (Only if empty)
+        $stmt = $db->query("SELECT COUNT(*) FROM branches");
+        if ($stmt->fetchColumn() == 0) {
+            $branches = [
+                ['Kabul Main', 'Kabul', 'Shar-e-Naw, Kabul', '+93 700 111 222', '08:00 AM - 06:00 PM'],
+                ['Herat Branch', 'Herat', 'Main Road, Herat', '+93 700 333 444', '08:30 AM - 05:30 PM'],
+                ['Mazar Center', 'Mazar-i-Sharif', 'Balkh Street, Mazar', '+93 700 555 666', '08:00 AM - 05:00 PM'],
+                ['Kandahar Hub', 'Kandahar', 'Airport Road, Kandahar', '+93 700 777 888', '09:00 AM - 04:00 PM']
+            ];
+            $stmt = $db->prepare("INSERT INTO branches (name, city, address, phone, hours) VALUES (?, ?, ?, ?, ?)");
+            foreach ($branches as $branch) {
+                $stmt->execute($branch);
+            }
+        }
+
+        $stmt = $db->query("SELECT COUNT(*) FROM cars");
+        if ($stmt->fetchColumn() == 0) {
+            $brands = ['Toyota', 'Lexus', 'Mercedes-Benz', 'BMW', 'Audi', 'Land Rover', 'Porsche', 'Tesla'];
+            $models = [
+                'Toyota' => ['Camry', 'Land Cruiser', 'Corolla', 'RAV4'],
+                'Lexus' => ['LX 600', 'RX 350', 'ES 350'],
+                'Mercedes-Benz' => ['S-Class', 'G-Wagon', 'E-Class'],
+                'BMW' => ['X7', 'X5', '7 Series'],
+                'Audi' => ['Q8', 'A8', 'RS7'],
+                'Land Rover' => ['Defender', 'Range Rover'],
+                'Porsche' => ['911 Carrera', 'Cayenne'],
+                'Tesla' => ['Model S', 'Model X']
+            ];
+            
+            $stmt = $db->prepare("INSERT INTO cars (vin, brand, model, year, price, mileage, transmission, fuel_type, branch_id, is_featured, image_url, installment_available) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
+            
+            for ($i = 1; $i <= 20; $i++) {
+                $brand = $brands[array_rand($brands)];
+                $model = $models[$brand][array_rand($models[$brand])];
+                $year = rand(2020, 2024);
+                $price = rand(45000, 180000);
+                $mileage = rand(0, 15000);
+                $branch_id = rand(1, 4);
+                $is_featured = ($i <= 8) ? 1 : 0; 
+                $installment_available = rand(0, 1);
+                $image_url = "assets/images/cars/car{$i}.jpg";
+                $vin = "VIN" . str_pad((string)$i, 10, "0", STR_PAD_LEFT);
+                
+                $stmt->execute([
+                    $vin, $brand, $model, $year, $price, $mileage, 
+                    'Automatic', rand(0,1) ? 'Gasoline' : 'Hybrid', 
+                    $branch_id, $is_featured, $image_url, $installment_available
+                ]);
+            }
+        }
+
+        $stmt = $db->query("SELECT COUNT(*) FROM users");
+        if ($stmt->fetchColumn() == 0) {
+            $stmt = $db->prepare("INSERT INTO users (username, password, role) VALUES (?, ?, ?)");
+            $stmt->execute(['admin', password_hash('admin123', PASSWORD_DEFAULT), 'Super Admin']);
+        }
+
+        // Create flag file to prevent re-running on every request
+        file_put_contents($flagFile, date('Y-m-d H:i:s'));
+
+    } catch (Exception $e) {
+        error_log("DB Setup Failed: " . $e->getMessage());
+    }
+}
+?>
\ No newline at end of file
diff --git a/setup.php b/setup.php
index e358601..f2e5797 100644
--- a/setup.php
+++ b/setup.php
@@ -6,6 +6,12 @@ try {
 
     // Drop tables if they exist for a clean re-seed
     $db->exec("SET FOREIGN_KEY_CHECKS = 0");
+    $db->exec("DROP TABLE IF EXISTS notifications");
+    $db->exec("DROP TABLE IF EXISTS activity_logs");
+    $db->exec("DROP TABLE IF EXISTS installments");
+    $db->exec("DROP TABLE IF EXISTS sales");
+    $db->exec("DROP TABLE IF EXISTS reviews");
+    $db->exec("DROP TABLE IF EXISTS car_images");
     $db->exec("DROP TABLE IF EXISTS cars");
     $db->exec("DROP TABLE IF EXISTS branches");
     $db->exec("DROP TABLE IF EXISTS users");
@@ -21,6 +27,16 @@ try {
         hours VARCHAR(100)
     )");
 
+    // Create Users table
+    $db->exec("CREATE TABLE users (
+        id INT AUTO_INCREMENT PRIMARY KEY,
+        username VARCHAR(100) UNIQUE NOT NULL,
+        email VARCHAR(100) UNIQUE,
+        password VARCHAR(255) NOT NULL,
+        role ENUM('Guest', 'Customer', 'Dealer', 'Employee', 'Manager', 'Admin', 'Super Admin') DEFAULT 'Customer',
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+    )");
+
     // Create Cars table
     $db->exec("CREATE TABLE cars (
         id INT AUTO_INCREMENT PRIMARY KEY,
@@ -34,19 +50,78 @@ try {
         fuel_type VARCHAR(50),
         status ENUM('Available', 'Reserved', 'Sold') DEFAULT 'Available',
         branch_id INT,
+        dealer_id INT DEFAULT NULL,
+        installment_available BOOLEAN DEFAULT 0,
         is_featured BOOLEAN DEFAULT 0,
         image_url VARCHAR(255),
         created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
-        FOREIGN KEY (branch_id) REFERENCES branches(id)
+        FOREIGN KEY (branch_id) REFERENCES branches(id),
+        FOREIGN KEY (dealer_id) REFERENCES users(id)
     )");
 
-    // Create Users table
-    $db->exec("CREATE TABLE users (
+    // Create Car Images table
+    $db->exec("CREATE TABLE car_images (
         id INT AUTO_INCREMENT PRIMARY KEY,
-        username VARCHAR(100) UNIQUE NOT NULL,
-        password VARCHAR(255) NOT NULL,
-        role ENUM('Guest', 'Customer', 'Dealer', 'Employee', 'Manager', 'Admin', 'Super Admin') DEFAULT 'Customer',
-        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+        car_id INT NOT NULL,
+        image_path VARCHAR(255) NOT NULL,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (car_id) REFERENCES cars(id) ON DELETE CASCADE
+    )");
+
+    // Create Reviews table
+    $db->exec("CREATE TABLE reviews (
+        id INT AUTO_INCREMENT PRIMARY KEY,
+        car_id INT NOT NULL,
+        user_id INT NOT NULL,
+        rating INT NOT NULL CHECK (rating >= 1 AND rating <= 5),
+        comment TEXT,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (car_id) REFERENCES cars(id) ON DELETE CASCADE,
+        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+    )");
+
+    // Create Sales table
+    $db->exec("CREATE TABLE sales (
+        id INT AUTO_INCREMENT PRIMARY KEY,
+        user_id INT NOT NULL,
+        car_id INT NOT NULL,
+        amount DECIMAL(15, 2) NOT NULL,
+        sale_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        status ENUM('Pending', 'Completed', 'Cancelled') DEFAULT 'Pending',
+        FOREIGN KEY (user_id) REFERENCES users(id),
+        FOREIGN KEY (car_id) REFERENCES cars(id)
+    )");
+
+    // Create Installments table
+    $db->exec("CREATE TABLE installments (
+        id INT AUTO_INCREMENT PRIMARY KEY,
+        sale_id INT NOT NULL,
+        total_amount DECIMAL(15, 2) NOT NULL,
+        paid_amount DECIMAL(15, 2) DEFAULT 0,
+        monthly_payment DECIMAL(15, 2) NOT NULL,
+        status ENUM('Active', 'Completed', 'Overdue') DEFAULT 'Active',
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (sale_id) REFERENCES sales(id) ON DELETE CASCADE
+    )");
+
+    // Create Activity Logs table
+    $db->exec("CREATE TABLE activity_logs (
+        id INT AUTO_INCREMENT PRIMARY KEY,
+        user_id INT,
+        action VARCHAR(255) NOT NULL,
+        ip_address VARCHAR(50),
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE SET NULL
+    )");
+
+    // Create Notifications table
+    $db->exec("CREATE TABLE notifications (
+        id INT AUTO_INCREMENT PRIMARY KEY,
+        user_id INT NOT NULL,
+        message TEXT NOT NULL,
+        is_read BOOLEAN DEFAULT 0,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
     )");
 
     // Seed Branches
@@ -74,7 +149,7 @@ try {
         'Tesla' => ['Model S', 'Model X']
     ];
     
-    $stmt = $db->prepare("INSERT INTO cars (vin, brand, model, year, price, mileage, transmission, fuel_type, branch_id, is_featured, image_url) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
+    $stmt = $db->prepare("INSERT INTO cars (vin, brand, model, year, price, mileage, transmission, fuel_type, branch_id, is_featured, image_url, installment_available) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
     
     for ($i = 1; $i <= 20; $i++) {
         $brand = $brands[array_rand($brands)];
@@ -84,13 +159,14 @@ try {
         $mileage = rand(0, 15000);
         $branch_id = rand(1, 4);
         $is_featured = ($i <= 8) ? 1 : 0; // 8 featured cars
+        $installment_available = rand(0, 1);
         $image_url = "assets/images/cars/car{$i}.jpg";
         $vin = "VIN" . str_pad((string)$i, 10, "0", STR_PAD_LEFT);
         
         $stmt->execute([
             $vin, $brand, $model, $year, $price, $mileage, 
             'Automatic', rand(0,1) ? 'Gasoline' : 'Hybrid', 
-            $branch_id, $is_featured, $image_url
+            $branch_id, $is_featured, $image_url, $installment_available
         ]);
     }
 
@@ -98,6 +174,9 @@ try {
     $stmt = $db->prepare("INSERT INTO users (username, password, role) VALUES (?, ?, ?)");
     $stmt->execute(['admin', password_hash('admin123', PASSWORD_DEFAULT), 'Super Admin']);
 
+    // Create flag file for automated setup
+    file_put_contents(__DIR__ . '/db/setup_done.flag', date('Y-m-d H:i:s'));
+
     echo "<h1>Setup Successful!</h1>";
     echo "<p>Database recreated and exactly 20 premium cars seeded.</p>";
     echo "<p><strong>Admin Credentials:</strong> admin / admin123</p>";