package service

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"strings"
	"time"

	"backupx/server/internal/apperror"
	"backupx/server/internal/model"
	"backupx/server/internal/repository"
	"backupx/server/internal/storage"
	"backupx/server/internal/storage/codec"
)

const backupTaskMaskedValue = "********"

type BackupTaskUpsertInput struct {
	Name             string   `json:"name" binding:"required,min=1,max=100"`
	Type             string   `json:"type" binding:"required,oneof=file mysql sqlite postgresql pgsql saphana"`
	Enabled          bool     `json:"enabled"`
	CronExpr         string   `json:"cronExpr" binding:"max=64"`
	SourcePath       string   `json:"sourcePath" binding:"max=500"`
	SourcePaths      []string `json:"sourcePaths"`
	ExcludePatterns  []string `json:"excludePatterns"`
	DBHost           string   `json:"dbHost" binding:"max=255"`
	DBPort           int      `json:"dbPort"`
	DBUser           string   `json:"dbUser" binding:"max=100"`
	DBPassword       string   `json:"dbPassword" binding:"max=255"`
	DBName           string   `json:"dbName" binding:"max=255"`
	DBPath           string   `json:"dbPath" binding:"max=500"`
	StorageTargetID  uint     `json:"storageTargetId"`                       // deprecated: 向后兼容
	StorageTargetIDs []uint   `json:"storageTargetIds"`                      // 新增：多存储目标
	RetentionDays    int      `json:"retentionDays"`
	Compression      string   `json:"compression" binding:"omitempty,oneof=gzip none"`
	Encrypt          bool     `json:"encrypt"`
	MaxBackups       int      `json:"maxBackups"`
	// ExtraConfig 类型特有扩展配置（如 SAP HANA 的 backupLevel/backupChannels）
	ExtraConfig map[string]any `json:"extraConfig"`
}

type BackupTaskToggleInput struct {
	Enabled *bool `json:"enabled"`
}

type BackupTaskSummary struct {
	ID                 uint       `json:"id"`
	Name               string     `json:"name"`
	Type               string     `json:"type"`
	Enabled            bool       `json:"enabled"`
	CronExpr           string     `json:"cronExpr"`
	StorageTargetID    uint       `json:"storageTargetId"`              // deprecated: 取第一个
	StorageTargetName  string     `json:"storageTargetName"`            // deprecated: 取第一个
	StorageTargetIDs   []uint     `json:"storageTargetIds"`
	StorageTargetNames []string   `json:"storageTargetNames"`
	RetentionDays      int        `json:"retentionDays"`
	Compression        string     `json:"compression"`
	Encrypt            bool       `json:"encrypt"`
	MaxBackups         int        `json:"maxBackups"`
	LastRunAt          *time.Time `json:"lastRunAt,omitempty"`
	LastStatus         string     `json:"lastStatus"`
	UpdatedAt          time.Time  `json:"updatedAt"`
}

type BackupTaskDetail struct {
	BackupTaskSummary
	SourcePath      string         `json:"sourcePath"`
	SourcePaths     []string       `json:"sourcePaths"`
	ExcludePatterns []string       `json:"excludePatterns"`
	DBHost          string         `json:"dbHost"`
	DBPort          int            `json:"dbPort"`
	DBUser          string         `json:"dbUser"`
	DBName          string         `json:"dbName"`
	DBPath          string         `json:"dbPath"`
	ExtraConfig     map[string]any `json:"extraConfig,omitempty"`
	MaskedFields    []string       `json:"maskedFields,omitempty"`
	CreatedAt       time.Time      `json:"createdAt"`
}

type BackupTaskScheduler interface {
	SyncTask(ctx context.Context, task *model.BackupTask) error
	RemoveTask(ctx context.Context, taskID uint) error
}

type BackupTaskService struct {
	tasks           repository.BackupTaskRepository
	targets         repository.StorageTargetRepository
	records         repository.BackupRecordRepository
	storageRegistry *storage.Registry
	cipher          *codec.ConfigCipher
	scheduler       BackupTaskScheduler
}

func NewBackupTaskService(
	tasks repository.BackupTaskRepository,
	targets repository.StorageTargetRepository,
	cipher *codec.ConfigCipher,
) *BackupTaskService {
	return &BackupTaskService{tasks: tasks, targets: targets, cipher: cipher}
}

// SetRecordsAndStorage 注入备份记录仓库和存储注册表，用于任务删除时清理远端文件。
func (s *BackupTaskService) SetRecordsAndStorage(records repository.BackupRecordRepository, registry *storage.Registry) {
	s.records = records
	s.storageRegistry = registry
}

func (s *BackupTaskService) SetScheduler(scheduler BackupTaskScheduler) {
	s.scheduler = scheduler
}

func (s *BackupTaskService) List(ctx context.Context) ([]BackupTaskSummary, error) {
	items, err := s.tasks.List(ctx, repository.BackupTaskListOptions{})
	if err != nil {
		return nil, apperror.Internal("BACKUP_TASK_LIST_FAILED", "无法获取备份任务列表", err)
	}
	result := make([]BackupTaskSummary, 0, len(items))
	for _, item := range items {
		result = append(result, toBackupTaskSummary(&item))
	}
	return result, nil
}

func (s *BackupTaskService) Get(ctx context.Context, id uint) (*BackupTaskDetail, error) {
	item, err := s.tasks.FindByID(ctx, id)
	if err != nil {
		return nil, apperror.Internal("BACKUP_TASK_GET_FAILED", "无法获取备份任务详情", err)
	}
	if item == nil {
		return nil, apperror.New(http.StatusNotFound, "BACKUP_TASK_NOT_FOUND", "备份任务不存在", fmt.Errorf("backup task %d not found", id))
	}
	return s.toDetail(item)
}

func (s *BackupTaskService) Create(ctx context.Context, input BackupTaskUpsertInput) (*BackupTaskDetail, error) {
	input.Type = normalizeBackupTaskType(input.Type)
	if err := s.validateInput(ctx, nil, input); err != nil {
		return nil, err
	}
	existing, err := s.tasks.FindByName(ctx, strings.TrimSpace(input.Name))
	if err != nil {
		return nil, apperror.Internal("BACKUP_TASK_LOOKUP_FAILED", "无法检查备份任务名称", err)
	}
	if existing != nil {
		return nil, apperror.Conflict("BACKUP_TASK_NAME_EXISTS", "备份任务名称已存在", nil)
	}
	item, err := s.buildTask(nil, input)
	if err != nil {
		return nil, err
	}
	if err := s.tasks.Create(ctx, item); err != nil {
		return nil, apperror.Internal("BACKUP_TASK_CREATE_FAILED", "无法创建备份任务", err)
	}
	if s.scheduler != nil {
		if err := s.scheduler.SyncTask(ctx, item); err != nil {
			return nil, apperror.Internal("BACKUP_TASK_SCHEDULE_FAILED", "无法同步备份任务调度", err)
		}
	}
	return s.Get(ctx, item.ID)
}

func (s *BackupTaskService) Update(ctx context.Context, id uint, input BackupTaskUpsertInput) (*BackupTaskDetail, error) {
	input.Type = normalizeBackupTaskType(input.Type)
	existing, err := s.tasks.FindByID(ctx, id)
	if err != nil {
		return nil, apperror.Internal("BACKUP_TASK_GET_FAILED", "无法获取备份任务详情", err)
	}
	if existing == nil {
		return nil, apperror.New(http.StatusNotFound, "BACKUP_TASK_NOT_FOUND", "备份任务不存在", fmt.Errorf("backup task %d not found", id))
	}
	if err := s.validateInput(ctx, existing, input); err != nil {
		return nil, err
	}
	sameName, err := s.tasks.FindByName(ctx, strings.TrimSpace(input.Name))
	if err != nil {
		return nil, apperror.Internal("BACKUP_TASK_LOOKUP_FAILED", "无法检查备份任务名称", err)
	}
	if sameName != nil && sameName.ID != existing.ID {
		return nil, apperror.Conflict("BACKUP_TASK_NAME_EXISTS", "备份任务名称已存在", nil)
	}
	item, err := s.buildTask(existing, input)
	if err != nil {
		return nil, err
	}
	item.ID = existing.ID
	item.CreatedAt = existing.CreatedAt
	if err := s.tasks.Update(ctx, item); err != nil {
		return nil, apperror.Internal("BACKUP_TASK_UPDATE_FAILED", "无法更新备份任务", err)
	}
	if s.scheduler != nil {
		if err := s.scheduler.SyncTask(ctx, item); err != nil {
			return nil, apperror.Internal("BACKUP_TASK_SCHEDULE_FAILED", "无法同步备份任务调度", err)
		}
	}
	return s.Get(ctx, item.ID)
}

// DeleteResult 描述任务删除的结果信息，用于审计日志。
type DeleteResult struct {
	TaskName     string
	RecordCount  int
	CleanedFiles int
}

func (s *BackupTaskService) Delete(ctx context.Context, id uint) (*DeleteResult, error) {
	existing, err := s.tasks.FindByID(ctx, id)
	if err != nil {
		return nil, apperror.Internal("BACKUP_TASK_GET_FAILED", "无法获取备份任务详情", err)
	}
	if existing == nil {
		return nil, apperror.New(http.StatusNotFound, "BACKUP_TASK_NOT_FOUND", "备份任务不存在", fmt.Errorf("backup task %d not found", id))
	}
	if s.scheduler != nil {
		_ = s.scheduler.RemoveTask(ctx, id)
	}

	// 清理远端存储文件（尽力而为，不阻止删除）
	result := &DeleteResult{TaskName: existing.Name}
	result.RecordCount, result.CleanedFiles = s.cleanupRemoteFiles(ctx, id)

	if err := s.tasks.Delete(ctx, id); err != nil {
		return nil, apperror.Internal("BACKUP_TASK_DELETE_FAILED", "无法删除备份任务", err)
	}
	return result, nil
}

// cleanupRemoteFiles 尽力删除任务相关的远端备份文件，返回记录数和成功删除的文件数。
func (s *BackupTaskService) cleanupRemoteFiles(ctx context.Context, taskID uint) (recordCount int, cleanedFiles int) {
	if s.records == nil || s.storageRegistry == nil {
		return 0, 0
	}
	records, err := s.records.ListByTask(ctx, taskID)
	if err != nil {
		return 0, 0
	}
	recordCount = len(records)
	// 缓存 provider 避免同一存储目标重复创建连接
	providerCache := make(map[uint]storage.StorageProvider)
	for _, record := range records {
		if strings.TrimSpace(record.StoragePath) == "" {
			continue
		}
		provider, ok := providerCache[record.StorageTargetID]
		if !ok {
			provider, err = s.resolveStorageProvider(ctx, record.StorageTargetID)
			if err != nil {
				continue
			}
			providerCache[record.StorageTargetID] = provider
		}
		if err := provider.Delete(ctx, record.StoragePath); err == nil {
			cleanedFiles++
		}
	}
	return recordCount, cleanedFiles
}

func (s *BackupTaskService) resolveStorageProvider(ctx context.Context, targetID uint) (storage.StorageProvider, error) {
	target, err := s.targets.FindByID(ctx, targetID)
	if err != nil || target == nil {
		return nil, fmt.Errorf("target %d not found", targetID)
	}
	configMap := map[string]any{}
	if err := s.cipher.DecryptJSON(target.ConfigCiphertext, &configMap); err != nil {
		return nil, err
	}
	provider, err := s.storageRegistry.Create(ctx, target.Type, configMap)
	if err != nil {
		return nil, err
	}
	return provider, nil
}

func (s *BackupTaskService) Toggle(ctx context.Context, id uint, enabled bool) (*BackupTaskSummary, error) {
	item, err := s.tasks.FindByID(ctx, id)
	if err != nil {
		return nil, apperror.Internal("BACKUP_TASK_GET_FAILED", "无法获取备份任务详情", err)
	}
	if item == nil {
		return nil, apperror.New(http.StatusNotFound, "BACKUP_TASK_NOT_FOUND", "备份任务不存在", fmt.Errorf("backup task %d not found", id))
	}
	item.Enabled = enabled
	if err := s.tasks.Update(ctx, item); err != nil {
		return nil, apperror.Internal("BACKUP_TASK_UPDATE_FAILED", "无法更新备份任务状态", err)
	}
	if s.scheduler != nil {
		if err := s.scheduler.SyncTask(ctx, item); err != nil {
			return nil, apperror.Internal("BACKUP_TASK_SCHEDULE_FAILED", "无法同步备份任务调度", err)
		}
	}
	returnPtr, err := s.tasks.FindByID(ctx, id)
	if err != nil {
		return nil, apperror.Internal("BACKUP_TASK_GET_FAILED", "无法获取备份任务详情", err)
	}
	returnValue := toBackupTaskSummary(returnPtr)
	return &returnValue, nil
}

// resolveStorageTargetIDs 统一处理新旧字段，返回有效的存储目标 ID 列表
func resolveStorageTargetIDs(input BackupTaskUpsertInput) []uint {
	if len(input.StorageTargetIDs) > 0 {
		return input.StorageTargetIDs
	}
	if input.StorageTargetID > 0 {
		return []uint{input.StorageTargetID}
	}
	return nil
}

func (s *BackupTaskService) validateInput(ctx context.Context, existing *model.BackupTask, input BackupTaskUpsertInput) error {
	if strings.TrimSpace(input.Name) == "" {
		return apperror.BadRequest("BACKUP_TASK_INVALID", "任务名称不能为空", nil)
	}
	targetIDs := resolveStorageTargetIDs(input)
	if len(targetIDs) == 0 {
		return apperror.BadRequest("BACKUP_TASK_INVALID", "请选择至少一个存储目标", nil)
	}
	for _, tid := range targetIDs {
		target, err := s.targets.FindByID(ctx, tid)
		if err != nil {
			return apperror.Internal("BACKUP_TASK_STORAGE_LOOKUP_FAILED", "无法检查存储目标", err)
		}
		if target == nil {
			return apperror.BadRequest("BACKUP_STORAGE_TARGET_INVALID", fmt.Sprintf("关联的存储目标 %d 不存在", tid), nil)
		}
	}
	if input.RetentionDays < 0 {
		return apperror.BadRequest("BACKUP_TASK_INVALID", "保留天数不能小于 0", nil)
	}
	if input.MaxBackups < 0 {
		return apperror.BadRequest("BACKUP_TASK_INVALID", "最大保留份数不能小于 0", nil)
	}
	if input.Compression == "" {
		input.Compression = "gzip"
	}
	if strings.TrimSpace(input.CronExpr) != "" && len(strings.Fields(strings.TrimSpace(input.CronExpr))) < 5 {
		return apperror.BadRequest("BACKUP_TASK_INVALID", "Cron 表达式格式不正确", nil)
	}
	passwordRequired := existing == nil || existing.DBPasswordCiphertext == ""
	return validateTaskTypeSpecificFields(input, passwordRequired)
}

func validateTaskTypeSpecificFields(input BackupTaskUpsertInput, passwordRequired bool) error {
	switch normalizeBackupTaskType(input.Type) {
	case "file":
		hasSourcePaths := len(resolveSourcePaths(input)) > 0
		if !hasSourcePaths {
			return apperror.BadRequest("BACKUP_TASK_INVALID", "文件备份必须填写源路径", nil)
		}
	case "mysql", "postgresql", "saphana":
		if strings.TrimSpace(input.DBHost) == "" {
			return apperror.BadRequest("BACKUP_TASK_INVALID", "数据库主机不能为空", nil)
		}
		if input.DBPort <= 0 {
			return apperror.BadRequest("BACKUP_TASK_INVALID", "数据库端口必须大于 0", nil)
		}
		if strings.TrimSpace(input.DBUser) == "" {
			return apperror.BadRequest("BACKUP_TASK_INVALID", "数据库用户名不能为空", nil)
		}
		if passwordRequired && strings.TrimSpace(input.DBPassword) == "" {
			return apperror.BadRequest("BACKUP_TASK_INVALID", "数据库密码不能为空", nil)
		}
		if strings.TrimSpace(input.DBName) == "" {
			return apperror.BadRequest("BACKUP_TASK_INVALID", "数据库名称不能为空", nil)
		}
	case "sqlite":
		if strings.TrimSpace(input.DBPath) == "" {
			return apperror.BadRequest("BACKUP_TASK_INVALID", "SQLite 备份必须填写数据库文件路径", nil)
		}
	default:
		return apperror.BadRequest("BACKUP_TASK_INVALID", "不支持的备份任务类型", nil)
	}
	return nil
}

func (s *BackupTaskService) buildTask(existing *model.BackupTask, input BackupTaskUpsertInput) (*model.BackupTask, error) {
	excludePatterns, err := encodeExcludePatterns(input.ExcludePatterns)
	if err != nil {
		return nil, apperror.BadRequest("BACKUP_TASK_INVALID", "排除规则格式不合法", err)
	}
	sourcePathsJSON, err := encodeSourcePaths(resolveSourcePaths(input))
	if err != nil {
		return nil, apperror.BadRequest("BACKUP_TASK_INVALID", "源路径格式不合法", err)
	}
	passwordCiphertext := ""
	if existing != nil {
		passwordCiphertext = existing.DBPasswordCiphertext
	}
	if text := strings.TrimSpace(input.DBPassword); text != "" && text != backupTaskMaskedValue {
		ciphertext, encryptErr := s.cipher.Encrypt([]byte(text))
		if encryptErr != nil {
			return nil, apperror.Internal("BACKUP_TASK_ENCRYPT_FAILED", "无法保存数据库密码", encryptErr)
		}
		passwordCiphertext = ciphertext
	}
	compression := strings.TrimSpace(input.Compression)
	if compression == "" {
		compression = "gzip"
	}
	maxBackups := input.MaxBackups
	if maxBackups == 0 {
		maxBackups = 10
	}
	targetIDs := resolveStorageTargetIDs(input)
	// 保持旧字段兼容：取第一个
	primaryTargetID := uint(0)
	if len(targetIDs) > 0 {
		primaryTargetID = targetIDs[0]
	}
	// 构建多对多关联
	storageTargets := make([]model.StorageTarget, len(targetIDs))
	for i, tid := range targetIDs {
		storageTargets[i] = model.StorageTarget{ID: tid}
	}
	// 向后兼容：SourcePath 取第一个
	resolvedPaths := resolveSourcePaths(input)
	primarySourcePath := strings.TrimSpace(input.SourcePath)
	if len(resolvedPaths) > 0 {
		primarySourcePath = resolvedPaths[0]
	}
	extraConfigJSON, err := encodeExtraConfig(input.ExtraConfig)
	if err != nil {
		return nil, apperror.BadRequest("BACKUP_TASK_INVALID", "扩展配置格式不合法", err)
	}
	item := &model.BackupTask{
		Name:                 strings.TrimSpace(input.Name),
		Type:                 normalizeBackupTaskType(input.Type),
		Enabled:              input.Enabled,
		CronExpr:             strings.TrimSpace(input.CronExpr),
		SourcePath:           primarySourcePath,
		SourcePaths:          sourcePathsJSON,
		ExcludePatterns:      excludePatterns,
		DBHost:               strings.TrimSpace(input.DBHost),
		DBPort:               input.DBPort,
		DBUser:               strings.TrimSpace(input.DBUser),
		DBPasswordCiphertext: passwordCiphertext,
		DBName:               strings.TrimSpace(input.DBName),
		DBPath:               strings.TrimSpace(input.DBPath),
		ExtraConfig:          extraConfigJSON,
		StorageTargetID:      primaryTargetID,
		StorageTargets:       storageTargets,
		RetentionDays:        input.RetentionDays,
		Compression:          compression,
		Encrypt:              input.Encrypt,
		MaxBackups:           maxBackups,
		LastStatus:           "idle",
	}
	if existing != nil {
		item.LastRunAt = existing.LastRunAt
		item.LastStatus = existing.LastStatus
		item.CreatedAt = existing.CreatedAt
	}
	return item, nil
}

func (s *BackupTaskService) toDetail(item *model.BackupTask) (*BackupTaskDetail, error) {
	excludePatterns, err := decodeExcludePatterns(item.ExcludePatterns)
	if err != nil {
		return nil, apperror.Internal("BACKUP_TASK_DECODE_FAILED", "无法解析备份任务配置", err)
	}
	sourcePaths, err := decodeSourcePaths(item.SourcePaths)
	if err != nil {
		return nil, apperror.Internal("BACKUP_TASK_DECODE_FAILED", "无法解析源路径配置", err)
	}
	extraConfig, err := decodeExtraConfig(item.ExtraConfig)
	if err != nil {
		return nil, apperror.Internal("BACKUP_TASK_DECODE_FAILED", "无法解析扩展配置", err)
	}
	detail := &BackupTaskDetail{
		BackupTaskSummary: toBackupTaskSummary(item),
		SourcePath:        item.SourcePath,
		SourcePaths:       sourcePaths,
		ExcludePatterns:   excludePatterns,
		DBHost:            item.DBHost,
		DBPort:            item.DBPort,
		DBUser:            item.DBUser,
		DBName:            item.DBName,
		DBPath:            item.DBPath,
		ExtraConfig:       extraConfig,
		CreatedAt:         item.CreatedAt,
	}
	if item.DBPasswordCiphertext != "" {
		detail.MaskedFields = []string{"dbPassword"}
	}
	return detail, nil
}

func toBackupTaskSummary(item *model.BackupTask) BackupTaskSummary {
	// 从多对多关联提取 IDs 和 Names
	var targetIDs []uint
	var targetNames []string
	if len(item.StorageTargets) > 0 {
		for _, t := range item.StorageTargets {
			targetIDs = append(targetIDs, t.ID)
			targetNames = append(targetNames, t.Name)
		}
	} else if item.StorageTargetID > 0 {
		// 回退到旧字段
		targetIDs = []uint{item.StorageTargetID}
		targetNames = []string{item.StorageTarget.Name}
	}
	// 向后兼容：取第一个
	primaryID := uint(0)
	primaryName := ""
	if len(targetIDs) > 0 {
		primaryID = targetIDs[0]
	}
	if len(targetNames) > 0 {
		primaryName = targetNames[0]
	}
	return BackupTaskSummary{
		ID:                 item.ID,
		Name:               item.Name,
		Type:               normalizeBackupTaskType(item.Type),
		Enabled:            item.Enabled,
		CronExpr:           item.CronExpr,
		StorageTargetID:    primaryID,
		StorageTargetName:  primaryName,
		StorageTargetIDs:   targetIDs,
		StorageTargetNames: targetNames,
		RetentionDays:      item.RetentionDays,
		Compression:        item.Compression,
		Encrypt:            item.Encrypt,
		MaxBackups:         item.MaxBackups,
		LastRunAt:          item.LastRunAt,
		LastStatus:         item.LastStatus,
		UpdatedAt:          item.UpdatedAt,
	}
}

func encodeExcludePatterns(value []string) (string, error) {
	if len(value) == 0 {
		return "[]", nil
	}
	encoded, err := json.Marshal(value)
	if err != nil {
		return "", err
	}
	return string(encoded), nil
}

func decodeExcludePatterns(value string) ([]string, error) {
	if strings.TrimSpace(value) == "" {
		return []string{}, nil
	}
	var items []string
	if err := json.Unmarshal([]byte(value), &items); err != nil {
		return nil, err
	}
	return items, nil
}

// resolveSourcePaths 统一处理 sourcePaths / sourcePath，返回有效路径列表
func resolveSourcePaths(input BackupTaskUpsertInput) []string {
	if len(input.SourcePaths) > 0 {
		var cleaned []string
		for _, p := range input.SourcePaths {
			if trimmed := strings.TrimSpace(p); trimmed != "" {
				cleaned = append(cleaned, trimmed)
			}
		}
		if len(cleaned) > 0 {
			return cleaned
		}
	}
	if sp := strings.TrimSpace(input.SourcePath); sp != "" {
		return []string{sp}
	}
	return nil
}

func encodeSourcePaths(paths []string) (string, error) {
	if len(paths) == 0 {
		return "[]", nil
	}
	encoded, err := json.Marshal(paths)
	if err != nil {
		return "", err
	}
	return string(encoded), nil
}

func decodeSourcePaths(value string) ([]string, error) {
	if strings.TrimSpace(value) == "" || strings.TrimSpace(value) == "[]" {
		return []string{}, nil
	}
	var items []string
	if err := json.Unmarshal([]byte(value), &items); err != nil {
		return nil, err
	}
	return items, nil
}

func encodeExtraConfig(value map[string]any) (string, error) {
	if len(value) == 0 {
		return "", nil
	}
	encoded, err := json.Marshal(value)
	if err != nil {
		return "", err
	}
	return string(encoded), nil
}

func decodeExtraConfig(value string) (map[string]any, error) {
	trimmed := strings.TrimSpace(value)
	if trimmed == "" || trimmed == "{}" {
		return nil, nil
	}
	result := map[string]any{}
	if err := json.Unmarshal([]byte(trimmed), &result); err != nil {
		return nil, err
	}
	return result, nil
}

func normalizeBackupTaskType(value string) string {
	normalized := strings.TrimSpace(strings.ToLower(value))
	if normalized == "pgsql" {
		return "postgresql"
	}
	return normalized
}