// Copyright 2021 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package common

import (
	"context"
	"fmt"
	"time"

	"code.gitea.io/gitea/models/db"
	"code.gitea.io/gitea/models/migrations"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/setting"
)

// InitDBEngine In case of problems connecting to DB, retry connection. Eg, PGSQL in Docker Container on Synology
func InitDBEngine(ctx context.Context) (err error) {
	log.Info("Beginning ORM engine initialization.")
	for i := 0; i < setting.Database.DBConnectRetries; i++ {
		select {
		case <-ctx.Done():
			return fmt.Errorf("Aborted due to shutdown:\nin retry ORM engine initialization")
		default:
		}
		log.Info("ORM engine initialization attempt #%d/%d...", i+1, setting.Database.DBConnectRetries)
		if err = db.InitEngineWithMigration(ctx, migrations.Migrate); err == nil {
			break
		} else if i == setting.Database.DBConnectRetries-1 {
			return err
		}
		log.Error("ORM engine initialization attempt #%d/%d failed. Error: %v", i+1, setting.Database.DBConnectRetries, err)
		log.Info("Backing off for %d seconds", int64(setting.Database.DBConnectBackoff/time.Second))
		time.Sleep(setting.Database.DBConnectBackoff)
	}
	db.HasEngine = true
	return nil
}
