package service

import (
	"context"
	"encoding/json"
	"fmt"
	"io/fs"
	"os"
	"path"
	"strings"
	"time"

	"github.com/1Panel-dev/1Panel/agent/app/repo"

	"github.com/1Panel-dev/1Panel/agent/app/task"
	"github.com/1Panel-dev/1Panel/agent/i18n"
	"github.com/1Panel-dev/1Panel/agent/utils/cmd"
	"github.com/1Panel-dev/1Panel/agent/utils/compose"

	"github.com/1Panel-dev/1Panel/agent/app/dto"
	"github.com/1Panel-dev/1Panel/agent/app/model"
	"github.com/1Panel-dev/1Panel/agent/buserr"
	"github.com/1Panel-dev/1Panel/agent/constant"
	"github.com/1Panel-dev/1Panel/agent/global"
	"github.com/1Panel-dev/1Panel/agent/utils/common"
	"github.com/1Panel-dev/1Panel/agent/utils/files"
)

func (u *BackupService) WebsiteBackup(req dto.CommonBackup) error {
	website, err := websiteRepo.GetFirst(websiteRepo.WithAlias(req.DetailName))
	if err != nil {
		return err
	}

	timeNow := time.Now().Format(constant.DateTimeSlimLayout)
	itemDir := fmt.Sprintf("website/%s", website.Alias)
	backupDir := path.Join(global.Dir.LocalBackupDir, itemDir)
	fileName := fmt.Sprintf("%s_%s.tar.gz", website.Alias, timeNow+common.RandStrAndNum(5))

	record := &model.BackupRecord{
		Type:              "website",
		Name:              website.Alias,
		DetailName:        website.Alias,
		SourceAccountIDs:  "1",
		DownloadAccountID: 1,
		FileDir:           itemDir,
		FileName:          fileName,
		TaskID:            req.TaskID,
		Status:            constant.StatusWaiting,
		Description:       req.Description,
	}
	if err = backupRepo.CreateRecord(record); err != nil {
		global.LOG.Errorf("save backup record failed, err: %v", err)
		return err
	}
	if err = handleWebsiteBackup(&website, nil, record.ID, backupDir, fileName, "", req.Secret, req.TaskID); err != nil {
		markBackupFailed(record.ID, err)
		global.LOG.Errorf("backup website %s failed, err: %v", website.Alias, err)
		return err
	}
	return nil
}

func (u *BackupService) WebsiteRecover(req dto.CommonRecover) error {
	website, err := websiteRepo.GetFirst(websiteRepo.WithAlias(req.DetailName))
	if err != nil {
		return err
	}
	if err := handleWebsiteRecover(&website, nil, req.File, false, req.Secret, req.TaskID); err != nil {
		global.LOG.Errorf("recover website %s failed, err: %v", website.Alias, err)
	}
	return nil
}

func handleWebsiteRecover(website *model.Website, parentTask *task.Task, recoverFile string, isRollback bool, secret, taskID string) error {
	var (
		err          error
		recoverTask  *task.Task
		isOk         = false
		rollbackFile string
	)
	recoverTask = parentTask
	if parentTask == nil {
		recoverTask, err = task.NewTaskWithOps(website.PrimaryDomain, task.TaskRecover, task.TaskScopeBackup, taskID, website.ID)
		if err != nil {
			return err
		}
	}
	recoverWebsite := func(t *task.Task) error {
		if !isRollback {
			rollbackFile = path.Join(global.Dir.TmpDir, fmt.Sprintf("website/%s_%s.tar.gz", website.Alias, time.Now().Format(constant.DateTimeSlimLayout)))
			if err := handleWebsiteBackup(website, recoverTask, 0, path.Dir(rollbackFile), path.Base(rollbackFile), "", "", taskID); err != nil {
				return fmt.Errorf("backup website %s for rollback before recover failed, err: %v", website.Alias, err)
			}
		}

		fileOp := files.NewFileOp()
		tmpPath := strings.ReplaceAll(recoverFile, ".tar.gz", "")
		t.Log(i18n.GetWithName("DeCompressFile", recoverFile))
		if err = fileOp.TarGzExtractPro(recoverFile, path.Dir(recoverFile), secret); err != nil {
			return err
		}
		defer func() {
			_ = os.RemoveAll(tmpPath)
		}()

		var oldWebsite model.Website
		websiteJson, err := os.ReadFile(tmpPath + "/website.json")
		if err != nil {
			return err
		}
		if err = json.Unmarshal(websiteJson, &oldWebsite); err != nil {
			return fmt.Errorf("unmarshal app.json failed, err: %v", err)
		}

		if err = checkValidOfWebsite(&oldWebsite, website); err != nil {
			t.Log(i18n.GetWithName("ErrCheckValid", err.Error()))
			return err
		}

		temPathWithName := tmpPath + "/" + website.Alias
		if !fileOp.Stat(tmpPath+"/website.json") || !fileOp.Stat(temPathWithName+".conf") || !fileOp.Stat(temPathWithName+".web.tar.gz") {
			return buserr.WithDetail("ErrBackupExist", ".conf or .web.tar.gz", nil)
		}
		if website.Type == constant.Deployment {
			if !fileOp.Stat(temPathWithName + ".app.tar.gz") {
				return buserr.WithDetail("ErrBackupExist", ".app.tar.gz", nil)
			}
		}

		nginxInfo, err := appInstallRepo.LoadBaseInfo(constant.AppOpenresty, "")
		if err != nil {
			return err
		}
		if err = fileOp.CopyFile(fmt.Sprintf("%s/%s.conf", tmpPath, website.Alias), GetConfDir(*website)); err != nil {
			return err
		}

		switch website.Type {
		case constant.Deployment:
			app, err := appInstallRepo.GetFirst(repo.WithByID(website.AppInstallID))
			if err != nil {
				return err
			}
			taskName := task.GetTaskName(app.Name, task.TaskRecover, task.TaskScopeApp)
			t.LogStart(taskName)
			if err := handleAppRecover(&app, recoverTask, fmt.Sprintf("%s/%s.app.tar.gz", tmpPath, website.Alias), true, "", ""); err != nil {
				return err
			}
			t.LogSuccess(taskName)
			if _, err = compose.DownAndUp(fmt.Sprintf("%s/%s/%s/docker-compose.yml", global.Dir.AppInstallDir, app.App.Key, app.Name)); err != nil {
				return err
			}
		case constant.Runtime:
			runtime, err := runtimeRepo.GetFirst(context.Background(), repo.WithByID(website.RuntimeID))
			if err != nil {
				return err
			}
			taskName := task.GetTaskName(runtime.Name, task.TaskRecover, task.TaskScopeRuntime)
			t.LogStart(taskName)
			if err := handleRuntimeRecover(runtime, fmt.Sprintf("%s/%s.runtime.tar.gz", tmpPath, website.Alias), true, ""); err != nil {
				return err
			}
			t.LogSuccess(taskName)
			if oldWebsite.DbID > 0 {
				if err := recoverWebsiteDatabase(t, oldWebsite.DbID, oldWebsite.DbType, tmpPath, website.Alias); err != nil {
					return err
				}
			}
		case constant.Static:
			if oldWebsite.DbID > 0 {
				if err := recoverWebsiteDatabase(t, oldWebsite.DbID, oldWebsite.DbType, tmpPath, website.Alias); err != nil {
					return err
				}
			}
		}
		taskName := i18n.GetMsgByKey("TaskRecover") + i18n.GetMsgByKey("websiteDir")
		t.Log(taskName)
		if err = fileOp.TarGzExtractPro(fmt.Sprintf("%s/%s.web.tar.gz", tmpPath, website.Alias), GetOpenrestyDir(SitesRootDir), ""); err != nil {
			return err
		}
		if err := cmd.NewCommandMgr().Run("docker", "exec", "-i", nginxInfo.ContainerName, "nginx", "-s", "reload"); err != nil {
			return err
		}
		oldWebsite.ID = website.ID
		if err := websiteRepo.SaveWithoutCtx(&oldWebsite); err != nil {
			return err
		}
		isOk = true
		return nil
	}

	if parentTask != nil {
		return recoverWebsite(parentTask)
	}

	rollBackWebsite := func(t *task.Task) {
		if isRollback {
			return
		}
		if !isOk {
			t.Log(i18n.GetMsgByKey("RecoverFailedStartRollBack"))
			if err := handleWebsiteRecover(website, t, rollbackFile, true, "", ""); err != nil {
				t.LogFailedWithErr(i18n.GetMsgByKey("Rollback"), err)
				return
			}
			t.LogSuccess(i18n.GetMsgByKey("Rollback"))
			_ = os.RemoveAll(rollbackFile)
		} else {
			_ = os.RemoveAll(rollbackFile)
		}
	}
	recoverTask.AddSubTask(task.GetTaskName(website.PrimaryDomain, task.TaskRecover, task.TaskScopeBackup), recoverWebsite, rollBackWebsite)
	go func() {
		_ = recoverTask.Execute()
	}()
	return nil
}

func handleWebsiteBackup(website *model.Website, parentTask *task.Task, recordID uint, backupDir, fileName, excludes, secret, taskID string) error {
	var (
		err        error
		backupTask *task.Task
	)
	backupTask = parentTask
	if parentTask == nil {
		backupTask, err = task.NewTaskWithOps(website.Alias, task.TaskBackup, task.TaskScopeBackup, taskID, website.ID)
		if err != nil {
			return err
		}
	}
	itemHandler := func() error { return doWebsiteBackup(website, backupTask, backupDir, fileName, excludes, secret) }
	if parentTask != nil {
		return itemHandler()
	}
	backupTask.AddSubTaskWithOps(task.GetTaskName(website.Alias, task.TaskBackup, task.TaskScopeBackup), func(t *task.Task) error { return itemHandler() }, nil, 3, time.Hour)
	go func() {
		if err := backupTask.Execute(); err != nil {
			markBackupFailed(recordID, err)
			return
		}
		backupRepo.UpdateRecordByMap(recordID, map[string]interface{}{"status": constant.StatusSuccess})
	}()
	return nil
}

func doWebsiteBackup(website *model.Website, parentTask *task.Task, backupDir, fileName, excludes, secret string) error {
	fileOp := files.NewFileOp()
	tmpDir := fmt.Sprintf("%s/%s", backupDir, strings.ReplaceAll(fileName, ".tar.gz", ""))
	if !fileOp.Stat(tmpDir) {
		if err := os.MkdirAll(tmpDir, os.ModePerm); err != nil {
			return fmt.Errorf("mkdir %s failed, err: %v", backupDir, err)
		}
	}
	defer func() {
		_ = os.RemoveAll(tmpDir)
	}()

	remarkInfo, _ := json.Marshal(website)
	if err := fileOp.SaveFile(tmpDir+"/website.json", string(remarkInfo), fs.ModePerm); err != nil {
		return err
	}
	nginxConfFile := GetWebsiteConfigPath(*website)
	if err := fileOp.CopyFile(nginxConfFile, tmpDir); err != nil {
		return err
	}
	parentTask.Log(i18n.GetMsgByKey("BackupNginxConfig"))

	switch website.Type {
	case constant.Deployment:
		app, err := appInstallRepo.GetFirst(repo.WithByID(website.AppInstallID))
		if err != nil {
			return err
		}
		parentTask.LogStart(task.GetTaskName(app.Name, task.TaskBackup, task.TaskScopeApp))
		if err = handleAppBackup(&app, parentTask, 0, tmpDir, fmt.Sprintf("%s.app.tar.gz", website.Alias), excludes, "", ""); err != nil {
			return err
		}
		parentTask.LogSuccess(task.GetTaskName(app.Name, task.TaskBackup, task.TaskScopeApp))
	case constant.Runtime:
		runtime, err := runtimeRepo.GetFirst(context.Background(), repo.WithByID(website.RuntimeID))
		if err != nil {
			return err
		}
		parentTask.LogStart(task.GetTaskName(runtime.Name, task.TaskBackup, task.TaskScopeRuntime))
		if err = handleRuntimeBackup(runtime, tmpDir, fmt.Sprintf("%s.runtime.tar.gz", website.Alias), excludes, ""); err != nil {
			return err
		}
		parentTask.LogSuccess(task.GetTaskName(runtime.Name, task.TaskBackup, task.TaskScopeRuntime))
		if website.DbID > 0 {
			if err = backupDatabaseWithTask(parentTask, website.DbType, tmpDir, website.Alias, website.DbID); err != nil {
				return err
			}
		}
	case constant.Static:
		if website.DbID > 0 {
			if err := backupDatabaseWithTask(parentTask, website.DbType, tmpDir, website.Alias, website.DbID); err != nil {
				return err
			}
		}
	}

	websiteDir := GetSitePath(*website, SiteDir)
	parentTask.LogStart(i18n.GetMsgByKey("CompressDir"))
	if err := fileOp.TarGzCompressPro(true, websiteDir, path.Join(tmpDir, fmt.Sprintf("%s.web.tar.gz", website.Alias)), "", excludes); err != nil {
		return err
	}
	if err := fileOp.TarGzCompressPro(true, tmpDir, path.Join(backupDir, fileName), secret, ""); err != nil {
		return err
	}
	parentTask.Log(i18n.GetWithName("CompressFileSuccess", fileName))
	return nil
}

func checkValidOfWebsite(oldWebsite, website *model.Website) error {
	if oldWebsite.Alias != website.Alias || oldWebsite.Type != website.Type {
		return buserr.WithDetail("ErrBackupMatch", fmt.Sprintf("oldName: %s, oldType: %v", oldWebsite.Alias, oldWebsite.Type), nil)
	}
	if oldWebsite.AppInstallID != 0 {
		_, err := appInstallRepo.GetFirst(repo.WithByID(oldWebsite.AppInstallID))
		if err != nil {
			return buserr.WithDetail("ErrBackupMatch", "app", nil)
		}
	}
	if oldWebsite.RuntimeID != 0 {
		if _, err := runtimeRepo.GetFirst(context.Background(), repo.WithByID(oldWebsite.RuntimeID)); err != nil {
			return buserr.WithDetail("ErrBackupMatch", "runtime", nil)
		}
	}
	if oldWebsite.WebsiteSSLID != 0 {
		if _, err := websiteSSLRepo.GetFirst(repo.WithByID(oldWebsite.WebsiteSSLID)); err != nil {
			return buserr.WithDetail("ErrBackupMatch", "ssl", nil)
		}
	}
	return nil
}

func recoverWebsiteDatabase(t *task.Task, dbID uint, dbType, tmpPath, websiteKey string) error {
	switch dbType {
	case constant.AppPostgresql:
		db, err := postgresqlRepo.Get(repo.WithByID(dbID))
		if err != nil {
			return err
		}
		taskName := task.GetTaskName(db.Name, task.TaskRecover, task.TaskScopeDatabase)
		t.LogStart(taskName)
		if err := handlePostgresqlRecover(dto.CommonRecover{
			Name:       db.PostgresqlName,
			DetailName: db.Name,
			File:       fmt.Sprintf("%s/%s.sql.gz", tmpPath, websiteKey),
		}, t, true); err != nil {
			t.LogFailedWithErr(taskName, err)
			return err
		}
		t.LogSuccess(taskName)
	case constant.AppMysql, constant.AppMariaDB:
		db, err := mysqlRepo.Get(repo.WithByID(dbID))
		if err != nil {
			return err
		}
		taskName := task.GetTaskName(db.Name, task.TaskRecover, task.TaskScopeDatabase)
		t.LogStart(taskName)
		if err := handleMysqlRecover(dto.CommonRecover{
			Name:       db.MysqlName,
			DetailName: db.Name,
			File:       fmt.Sprintf("%s/%s.sql.gz", tmpPath, websiteKey),
		}, t, true); err != nil {
			t.LogFailedWithErr(taskName, err)
			return err
		}
		t.LogSuccess(taskName)
	}
	return nil
}
