<?php
require_once 'db/config.php';
$db = db();
try {
    // 1. Add member_price to products
    $columns = $db->query("SHOW COLUMNS FROM products LIKE 'member_price'")->fetchAll();
    if (empty($columns)) {
        $db->exec("ALTER TABLE products ADD COLUMN member_price DECIMAL(15, 2) NOT NULL DEFAULT 0 AFTER selling_price");
        // Update member_price to be slightly lower than selling_price for existing products
        $db->exec("UPDATE products SET member_price = selling_price * 0.9 WHERE member_price = 0");
    }

    // 2. Create members table
    $db->exec("CREATE TABLE IF NOT EXISTS members (
        id INT AUTO_INCREMENT PRIMARY KEY,
        code VARCHAR(50) UNIQUE NOT NULL,
        name VARCHAR(255) NOT NULL,
        phone VARCHAR(20),
        email VARCHAR(100),
        points INT DEFAULT 0,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
    ) ENGINE=InnoDB;");

    // 3. Create sales table
    $db->exec("CREATE TABLE IF NOT EXISTS sales (
        id INT AUTO_INCREMENT PRIMARY KEY,
        invoice_no VARCHAR(50) UNIQUE NOT NULL,
        member_id INT NULL,
        total_amount DECIMAL(15, 2) NOT NULL,
        discount DECIMAL(15, 2) DEFAULT 0,
        points_earned INT DEFAULT 0,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (member_id) REFERENCES members(id)
    ) ENGINE=InnoDB;");

    // 4. Create sale_items table
    $db->exec("CREATE TABLE IF NOT EXISTS sale_items (
        id INT AUTO_INCREMENT PRIMARY KEY,
        sale_id INT NOT NULL,
        product_id INT NOT NULL,
        quantity INT NOT NULL,
        price DECIMAL(15, 2) NOT NULL,
        subtotal DECIMAL(15, 2) NOT NULL,
        FOREIGN KEY (sale_id) REFERENCES sales(id),
        FOREIGN KEY (product_id) REFERENCES products(id)
    ) ENGINE=InnoDB;");

    echo "Member and Points Tables Initialized";
} catch (Exception $e) {
    echo "Error: " . $e->getMessage();
}