<?php

declare(strict_types=1);

require dirname(__DIR__) . '/vendor/autoload.php';

$dotenv = Dotenv\Dotenv::createImmutable(dirname(__DIR__));
$dotenv->safeLoad();

$dsn = sprintf(
    'mysql:host=%s;port=%s;dbname=%s;charset=%s',
    $_ENV['DB_HOST'] ?? '127.0.0.1',
    $_ENV['DB_PORT'] ?? '3306',
    $_ENV['DB_DATABASE'] ?? '',
    $_ENV['DB_CHARSET'] ?? 'utf8mb4'
);

$pdo = new PDO(
    $dsn,
    $_ENV['DB_USERNAME'] ?? '',
    $_ENV['DB_PASSWORD'] ?? '',
    [
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
    ]
);

function hasTable(PDO $pdo, string $table): bool
{
    $stmt = $pdo->prepare('SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = ?');
    $stmt->execute([$table]);
    return (int)$stmt->fetchColumn() > 0;
}

function hasIndex(PDO $pdo, string $table, string $index): bool
{
    $stmt = $pdo->prepare('SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = ? AND INDEX_NAME = ?');
    $stmt->execute([$table, $index]);
    return (int)$stmt->fetchColumn() > 0;
}

if (!hasTable($pdo, 'user_auths')) {
    $pdo->exec(<<<'SQL'
CREATE TABLE user_auths (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  user_id BIGINT UNSIGNED NOT NULL,
  auth_type VARCHAR(32) NOT NULL,
  auth_open_id VARCHAR(128) NOT NULL DEFAULT '',
  auth_union_id VARCHAR(128) NOT NULL DEFAULT '',
  auth_key VARCHAR(128) NOT NULL DEFAULT '',
  auth_extra JSON NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uk_user_auths_type_key (auth_type, auth_key),
  KEY idx_user_auths_user_id (user_id),
  KEY idx_user_auths_auth_union_id (auth_type, auth_union_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='用户认证映射'
SQL);
    echo "CREATE_TABLE user_auths\n";
} elseif (!hasIndex($pdo, 'user_auths', 'idx_user_auths_auth_union_id')) {
    $pdo->exec('ALTER TABLE user_auths ADD KEY idx_user_auths_auth_union_id (auth_type, auth_union_id)');
    echo "ADD_INDEX user_auths.idx_user_auths_auth_union_id\n";
}

echo "SCHEMA_UPGRADE_OK\n";