<?php
// Enable error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Database configuration
$db_host = 'localhost';
$db_user = 'root';
$db_pass = '';

// Create connection without database
$conn = new mysqli($db_host, $db_user, $db_pass);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Create database if it doesn't exist
$db_name = 'lms_db';
$sql = "CREATE DATABASE IF NOT EXISTS $db_name";
if ($conn->query($sql) === TRUE) {
    echo "Database created successfully or already exists<br>";
} else {
    die("Error creating database: " . $conn->error);
}

// Select the database
$conn->select_db($db_name);

// Create users table
$sql = "CREATE TABLE IF NOT EXISTS users (
    id INT(11) NOT NULL AUTO_INCREMENT,
    username VARCHAR(50) NOT NULL UNIQUE,
    email VARCHAR(100) NOT NULL UNIQUE,
    password VARCHAR(255) NOT NULL,
    first_name VARCHAR(50),
    last_name VARCHAR(50),
    role ENUM('admin', 'instructor', 'student') NOT NULL,
    status ENUM('active', 'inactive') NOT NULL DEFAULT 'active',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4";

if ($conn->query($sql) === TRUE) {
    echo "Users table created successfully<br>";
} else {
    echo "Error creating users table: " . $conn->error . "<br>";
}

// Create courses table
$sql = "CREATE TABLE IF NOT EXISTS courses (
    id INT(11) NOT NULL AUTO_INCREMENT,
    title VARCHAR(255) NOT NULL,
    description TEXT,
    price DECIMAL(10,2) NOT NULL,
    instructor_id INT(11),
    status ENUM('active', 'inactive') NOT NULL DEFAULT 'active',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id),
    FOREIGN KEY (instructor_id) REFERENCES users(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4";

if ($conn->query($sql) === TRUE) {
    echo "Courses table created successfully<br>";
} else {
    echo "Error creating courses table: " . $conn->error . "<br>";
}

// Create enrollments table
$sql = "CREATE TABLE IF NOT EXISTS enrollments (
    id INT(11) NOT NULL AUTO_INCREMENT,
    user_id INT(11) NOT NULL,
    course_id INT(11) NOT NULL,
    status ENUM('active', 'completed', 'dropped') NOT NULL DEFAULT 'active',
    progress INT(11) NOT NULL DEFAULT 0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id),
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (course_id) REFERENCES courses(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4";

if ($conn->query($sql) === TRUE) {
    echo "Enrollments table created successfully<br>";
} else {
    echo "Error creating enrollments table: " . $conn->error . "<br>";
}

// Create submissions table
$sql = "CREATE TABLE IF NOT EXISTS submissions (
    id INT(11) NOT NULL AUTO_INCREMENT,
    user_id INT(11) NOT NULL,
    course_id INT(11) NOT NULL,
    title VARCHAR(255) NOT NULL,
    content TEXT,
    status ENUM('pending', 'graded') NOT NULL DEFAULT 'pending',
    grade INT(11),
    feedback TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id),
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (course_id) REFERENCES courses(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4";

if ($conn->query($sql) === TRUE) {
    echo "Submissions table created successfully<br>";
} else {
    echo "Error creating submissions table: " . $conn->error . "<br>";
}

// Create payments table
$sql = "CREATE TABLE IF NOT EXISTS payments (
    id INT(11) NOT NULL AUTO_INCREMENT,
    user_id INT(11) NOT NULL,
    course_id INT(11) NOT NULL,
    amount DECIMAL(10,2) NOT NULL,
    status ENUM('pending', 'completed', 'failed') NOT NULL DEFAULT 'pending',
    payment_method VARCHAR(50),
    transaction_id VARCHAR(100),
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id),
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (course_id) REFERENCES courses(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4";

if ($conn->query($sql) === TRUE) {
    echo "Payments table created successfully<br>";
} else {
    echo "Error creating payments table: " . $conn->error . "<br>";
}

// Create slider_images table
$sql = "CREATE TABLE IF NOT EXISTS slider_images (
    id INT(11) NOT NULL AUTO_INCREMENT,
    title VARCHAR(255) NOT NULL,
    description TEXT,
    image_url VARCHAR(255) NOT NULL,
    link_url VARCHAR(255),
    order_number INT(11) NOT NULL DEFAULT 0,
    status ENUM('active', 'inactive') NOT NULL DEFAULT 'active',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4";

if ($conn->query($sql) === TRUE) {
    echo "Slider images table created successfully<br>";
} else {
    echo "Error creating slider images table: " . $conn->error . "<br>";
}

// Create default admin user if not exists
$admin_username = 'admin';
$admin_password = password_hash('admin123', PASSWORD_DEFAULT);
$admin_email = '[email protected]';

$sql = "INSERT IGNORE INTO users (username, email, password, first_name, last_name, role, status)
        VALUES (?, ?, ?, 'Admin', 'User', 'admin', 'active')";
$stmt = $conn->prepare($sql);
$stmt->bind_param("sss", $admin_username, $admin_email, $admin_password);

if ($stmt->execute()) {
    echo "Default admin user created or already exists<br>";
} else {
    echo "Error creating admin user: " . $stmt->error . "<br>";
}

$stmt->close();
$conn->close();

echo "<br>Database setup completed!<br>";
echo "Default admin credentials:<br>";
echo "Username: admin<br>";
echo "Password: admin123<br>";
echo "<br><a href='admin/login.php'>Go to Admin Login</a>";