<?php
require_once __DIR__ . '/../config.php';

try {
    $pdo = db();
    echo "Connected to database successfully.\n";

    $sql = <<<SQL
        CREATE TABLE IF NOT EXISTS `companies` (
            `id` INT AUTO_INCREMENT PRIMARY KEY,
            `name` VARCHAR(255) NOT NULL,
            `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP
        ) ENGINE=INNODB;

        CREATE TABLE IF NOT EXISTS `users` (
            `id` INT AUTO_INCREMENT PRIMARY KEY,
            `company_id` INT NOT NULL,
            `email` VARCHAR(255) NOT NULL UNIQUE,
            `password` VARCHAR(255) NOT NULL,
            `role` ENUM('super_admin', 'admin', 'employee', 'manager', 'payroll_clerk', 'accountant', 'auditor') NOT NULL,
            `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
            FOREIGN KEY (`company_id`) REFERENCES `companies`(`id`) ON DELETE CASCADE
        ) ENGINE=INNODB;

        CREATE TABLE IF NOT EXISTS `employees` (
            `id` INT AUTO_INCREMENT PRIMARY KEY,
            `user_id` INT NOT NULL,
            `company_id` INT NOT NULL,
            `first_name` VARCHAR(100) NOT NULL,
            `last_name` VARCHAR(100) NOT NULL,
            `date_of_birth` DATE,
            `hire_date` DATE,
            `position` VARCHAR(255),
            `basic_salary` DECIMAL(15, 2) NOT NULL DEFAULT 0.00,
            `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
            FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
            FOREIGN KEY (`company_id`) REFERENCES `companies`(`id`) ON DELETE CASCADE
        ) ENGINE=INNODB;

        CREATE TABLE IF NOT EXISTS `settings` (
            `id` INT AUTO_INCREMENT PRIMARY KEY,
            `company_id` INT NOT NULL,
            `setting_key` VARCHAR(255) NOT NULL,
            `setting_value` TEXT,
            `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
            UNIQUE KEY `company_setting` (`company_id`, `setting_key`),
            FOREIGN KEY (`company_id`) REFERENCES `companies`(`id`) ON DELETE CASCADE
        ) ENGINE=INNODB;
SQL;

    $pdo->exec($sql);
    echo "Successfully created initial tables: companies, users, employees, settings.\n";

} catch (PDOException $e) {
    die("Database migration failed: " . $e->getMessage() . "\n");
}