<?php
require_once __DIR__ . '/config.php';
$db = db();

try {
    // 1. Create the user_resources table
    $db->exec("CREATE TABLE IF NOT EXISTS user_resources (
        user_id INT NOT NULL,
        resource_id INT NOT NULL,
        amount BIGINT UNSIGNED NOT NULL DEFAULT 0,
        updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
        PRIMARY KEY (user_id, resource_id),
        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
        FOREIGN KEY (resource_id) REFERENCES game_resources(id) ON DELETE CASCADE
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");

    echo "Table user_resources created (if it did not exist).\n";

    // 2. Get all users and all resources
    $users = $db->query("SELECT id FROM users")->fetchAll(PDO::FETCH_COLUMN);
    $resources = $db->query("SELECT id, slug FROM game_resources")->fetchAll(PDO::FETCH_ASSOC);

    if (empty($users) || empty($resources)) {
        echo "No users or resources found to initialize.\n";
    } else {
        // 3. Initialize resources for each user
        $stmt = $db->prepare("INSERT IGNORE INTO user_resources (user_id, resource_id, amount) VALUES (?, ?, ?)");
        
        foreach ($users as $userId) {
            foreach ($resources as $resource) {
                $initialAmount = ($resource['slug'] === 'res_xp') ? 1 : 0;
                $stmt->execute([$userId, $resource['id'], $initialAmount]);
            }
        }
        echo "Resources initialized for " . count($users) . " users.\n";
    }

    echo "Migration completed successfully.\n";
} catch (PDOException $e) {
    die("Migration failed: " . $e->getMessage() . "\n");
}