<?php
// Simple script to setup database tables and seed initial data.
// This is for demonstration and initial setup.
// In a real-world scenario, a proper migration tool should be used.

require_once __DIR__ . '/config.php';

try {
    $pdo = db();
    
    // Set PDO to throw exceptions on error
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    echo "Starting database setup...\n";

    // Table: clinics
    $sql_clinics = "
    CREATE TABLE IF NOT EXISTS `clinics` (
        `id` INT AUTO_INCREMENT PRIMARY KEY,
        `name` VARCHAR(255) NOT NULL,
        `specialization` VARCHAR(255),
        `phone` VARCHAR(50),
        `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;";
    $pdo->exec($sql_clinics);
    echo "Table 'clinics' created successfully or already exists.\n";

    // Table: users
    $sql_users = "
    CREATE TABLE IF NOT EXISTS `users` (
        `id` INT AUTO_INCREMENT PRIMARY KEY,
        `clinic_id` INT NOT NULL,
        `mobile` VARCHAR(50) NOT NULL UNIQUE,
        `name` VARCHAR(255) NOT NULL,
        `role` ENUM('admin', 'doctor', 'assistant') NOT NULL,
        `is_active` BOOLEAN DEFAULT TRUE,
        `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (`clinic_id`) REFERENCES `clinics`(`id`) ON DELETE CASCADE
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;";
    $pdo->exec($sql_users);
    echo "Table 'users' created successfully or already exists.\n";

    // Table: patients
    $sql_patients = "
    CREATE TABLE IF NOT EXISTS `patients` (
        `id` INT AUTO_INCREMENT PRIMARY KEY,
        `clinic_id` INT NOT NULL,
        `name` VARCHAR(255) NOT NULL,
        `mobile` VARCHAR(50) NULL,
        `notes` TEXT,
        `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
        FOREIGN KEY (`clinic_id`) REFERENCES `clinics`(`id`) ON DELETE CASCADE
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;";
    $pdo->exec($sql_patients);
    echo "Table 'patients' created successfully or already exists.\n";

    // --- SEED DATA ---

    // Check if clinic exists
    $stmt = $pdo->query("SELECT id FROM `clinics` WHERE id = 1");
    if ($stmt->rowCount() == 0) {
        $pdo->exec("INSERT INTO `clinics` (`id`, `name`, `specialization`, `phone`) VALUES (1, 'عيادة الأمل', 'الطب العام', '1234567890')");
        echo "Seeded 'clinics' table.\n";

        // Seed users only if clinic was just created
        $pdo->exec("INSERT INTO `users` (`clinic_id`, `mobile`, `name`, `role`) VALUES (1, '966500000001', 'د. أحمد محمود', 'doctor')");
        $pdo->exec("INSERT INTO `users` (`clinic_id`, `mobile`, `name`, `role`) VALUES (1, '966500000002', 'فاطمة علي', 'assistant')");
        echo "Seeded 'users' table.\n";

        // Seed patients only if clinic was just created
        $pdo->exec("INSERT INTO `patients` (`clinic_id`, `name`, `mobile`) VALUES (1, 'خالد الغامدي', '966510000001')");
        $pdo->exec("INSERT INTO `patients` (`clinic_id`, `name`, `mobile`) VALUES (1, 'سارة عبدالله', '966510000002')");
        $pdo->exec("INSERT INTO `patients` (`clinic_id`, `name`, `mobile`) VALUES (1, 'محمد الزهراني', '966510000003')");
        echo "Seeded 'patients' table.\n";
    } else {
        echo "Data already seeded.\n";
    }

    echo "Database setup finished successfully!\n";

} catch (PDOException $e) {
    die("Database error: " . $e->getMessage());
}