<?php

declare(strict_types=1);

namespace OCA\MailCalendarSync\Migration;

use Closure;
use OCP\DB\ISchemaWrapper;
use OCP\DB\Types;
use OCP\Migration\IOutput;
use OCP\Migration\SimpleMigrationStep;

/**
 * Migration that:
 * - Creates tables if they don't exist (fresh install)
 * - Adds sync_interval column to mcs_config if missing (upgrade from v1.0)
 */
class Version1003Date20250210000000 extends SimpleMigrationStep {

    public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ISchemaWrapper {
        /** @var ISchemaWrapper $schema */
        $schema = $schemaClosure();

        if (!$schema->hasTable('mcs_config')) {
            $table = $schema->createTable('mcs_config');

            $table->addColumn('id', Types::BIGINT, [
                'autoincrement' => true,
                'notnull' => true,
                'unsigned' => true,
            ]);
            $table->addColumn('user_id', Types::STRING, [
                'notnull' => true,
                'length' => 64,
            ]);
            $table->addColumn('enabled', Types::SMALLINT, [
                'notnull' => true,
                'default' => 0,
                'unsigned' => true,
            ]);
            $table->addColumn('mail_account_id', Types::BIGINT, [
                'notnull' => false,
                'unsigned' => true,
            ]);
            $table->addColumn('calendar_uri', Types::STRING, [
                'notnull' => false,
                'length' => 255,
            ]);
            $table->addColumn('auto_accept', Types::SMALLINT, [
                'notnull' => true,
                'default' => 0,
                'unsigned' => true,
            ]);
            $table->addColumn('sync_interval', Types::INTEGER, [
                'notnull' => true,
                'default' => 600,
                'unsigned' => true,
            ]);
            $table->addColumn('created_at', Types::STRING, [
                'notnull' => true,
                'length' => 32,
            ]);
            $table->addColumn('updated_at', Types::STRING, [
                'notnull' => true,
                'length' => 32,
            ]);

            $table->setPrimaryKey(['id']);
            $table->addUniqueIndex(['user_id'], 'mcs_config_user_idx');
        } else {
            // Table exists — ensure sync_interval column is present (upgrade path)
            $table = $schema->getTable('mcs_config');
            if (!$table->hasColumn('sync_interval')) {
                $table->addColumn('sync_interval', Types::INTEGER, [
                    'notnull' => true,
                    'default' => 600,
                    'unsigned' => true,
                ]);
            }
        }

        if (!$schema->hasTable('mcs_log')) {
            $table = $schema->createTable('mcs_log');

            $table->addColumn('id', Types::BIGINT, [
                'autoincrement' => true,
                'notnull' => true,
                'unsigned' => true,
            ]);
            $table->addColumn('user_id', Types::STRING, [
                'notnull' => true,
                'length' => 64,
            ]);
            $table->addColumn('event_uid', Types::STRING, [
                'notnull' => true,
                'length' => 512,
            ]);
            $table->addColumn('event_summary', Types::STRING, [
                'notnull' => false,
                'length' => 512,
            ]);
            $table->addColumn('action', Types::STRING, [
                'notnull' => true,
                'length' => 64,
            ]);
            $table->addColumn('attendee_email', Types::STRING, [
                'notnull' => false,
                'length' => 255,
            ]);
            $table->addColumn('from_email', Types::STRING, [
                'notnull' => false,
                'length' => 255,
            ]);
            $table->addColumn('message', Types::TEXT, [
                'notnull' => false,
            ]);
            $table->addColumn('created_at', Types::STRING, [
                'notnull' => true,
                'length' => 32,
            ]);

            $table->setPrimaryKey(['id']);
            $table->addIndex(['user_id', 'created_at'], 'mcs_log_user_date_idx');
        }

        if (!$schema->hasTable('mcs_processed')) {
            $table = $schema->createTable('mcs_processed');

            $table->addColumn('id', Types::BIGINT, [
                'autoincrement' => true,
                'notnull' => true,
                'unsigned' => true,
            ]);
            $table->addColumn('user_id', Types::STRING, [
                'notnull' => true,
                'length' => 64,
            ]);
            $table->addColumn('mail_account_id', Types::BIGINT, [
                'notnull' => true,
                'unsigned' => true,
            ]);
            $table->addColumn('message_id', Types::STRING, [
                'notnull' => true,
                'length' => 512,
            ]);
            $table->addColumn('processed_at', Types::STRING, [
                'notnull' => true,
                'length' => 32,
            ]);

            $table->setPrimaryKey(['id']);
            $table->addUniqueIndex(['user_id', 'mail_account_id', 'message_id'], 'mcs_proc_unique_idx');
            $table->addIndex(['user_id'], 'mcs_proc_user_idx');
        }

        return $schema;
    }
}