<?php

namespace App\Core\Database;

/**
 * NovaCore Database Migration
 * Base migration class
 */
abstract class Migration
{
    protected Connection $connection;

    public function __construct()
    {
        $this->connection = $this->getConnection();
    }

    /**
     * Get database connection
     */
    protected function getConnection(): Connection
    {
        $config = include __DIR__ . '/../../Config/database.php';
        $connectionConfig = $config['connections'][$config['default']];

        return new Connection($connectionConfig);
    }

    /**
     * Run the migration
     */
    abstract public function up(): void;

    /**
     * Reverse the migration
     */
    abstract public function down(): void;

    /**
     * Create table
     */
    protected function createTable(string $table, callable $callback): void
    {
        $blueprint = new Blueprint($table);
        $callback($blueprint);

        $sql = $blueprint->toSql();
        $this->connection->execute($sql);
    }

    /**
     * Drop table
     */
    protected function dropTable(string $table): void
    {
        $sql = "DROP TABLE IF EXISTS `{$table}`";
        $this->connection->execute($sql);
    }

    /**
     * Add column
     */
    protected function addColumn(string $table, string $column, string $type): void
    {
        $sql = "ALTER TABLE `{$table}` ADD COLUMN `{$column}` {$type}";
        $this->connection->execute($sql);
    }

    /**
     * Drop column
     */
    protected function dropColumn(string $table, string $column): void
    {
        $sql = "ALTER TABLE `{$table}` DROP COLUMN `{$column}`";
        $this->connection->execute($sql);
    }

    /**
     * Rename column
     */
    protected function renameColumn(string $table, string $from, string $to): void
    {
        $sql = "ALTER TABLE `{$table}` RENAME COLUMN `{$from}` TO `{$to}`";
        $this->connection->execute($sql);
    }

    /**
     * Add index
     */
    protected function addIndex(string $table, string $index, array $columns): void
    {
        $columnsStr = implode(', ', array_map(fn($col) => "`{$col}`", $columns));
        $sql = "CREATE INDEX `{$index}` ON `{$table}` ({$columnsStr})";
        $this->connection->execute($sql);
    }

    /**
     * Drop index
     */
    protected function dropIndex(string $table, string $index): void
    {
        $sql = "DROP INDEX `{$index}` ON `{$table}`";
        $this->connection->execute($sql);
    }
}