calypso/backend/internal/storage/handler.go

package storage

import (
	"context"
	"fmt"
	"net/http"
	"strings"

	"github.com/atlasos/calypso/internal/common/cache"
	"github.com/atlasos/calypso/internal/common/database"
	"github.com/atlasos/calypso/internal/common/logger"
	"github.com/atlasos/calypso/internal/tasks"
	"github.com/gin-gonic/gin"
)

// Handler handles storage-related API requests
type Handler struct {
	diskService             *DiskService
	lvmService              *LVMService
	zfsService              *ZFSService
	snapshotService         *SnapshotService
	snapshotScheduleService *SnapshotScheduleService
	replicationService      *ReplicationService
	arcService              *ARCService
	taskEngine              *tasks.Engine
	db                      *database.DB
	logger                  *logger.Logger
	cache                   *cache.Cache // Cache for invalidation
}

// SetCache sets the cache instance for cache invalidation
func (h *Handler) SetCache(c *cache.Cache) {
	h.cache = c
}

// NewHandler creates a new storage handler
func NewHandler(db *database.DB, log *logger.Logger) *Handler {
	snapshotService := NewSnapshotService(db, log)
	return &Handler{
		diskService:             NewDiskService(db, log),
		lvmService:              NewLVMService(db, log),
		zfsService:              NewZFSService(db, log),
		snapshotService:         snapshotService,
		snapshotScheduleService: NewSnapshotScheduleService(db, log, snapshotService),
		replicationService:      NewReplicationService(db, log),
		arcService:              NewARCService(log),
		taskEngine:              tasks.NewEngine(db, log),
		db:                      db,
		logger:                  log,
	}
}

// ListDisks lists all physical disks from database
func (h *Handler) ListDisks(c *gin.Context) {
	disks, err := h.diskService.ListDisksFromDatabase(c.Request.Context())
	if err != nil {
		h.logger.Error("Failed to list disks", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to list disks"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"disks": disks})
}

// SyncDisks syncs discovered disks to database
func (h *Handler) SyncDisks(c *gin.Context) {
	userID, _ := c.Get("user_id")

	// Create async task
	taskID, err := h.taskEngine.CreateTask(c.Request.Context(),
		tasks.TaskTypeRescan, userID.(string), map[string]interface{}{
			"operation": "sync_disks",
		})
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to create task"})
		return
	}

	// Run sync in background
	go func() {
		// Create new context for background task (don't use request context which may expire)
		ctx := context.Background()
		h.taskEngine.StartTask(ctx, taskID)
		h.taskEngine.UpdateProgress(ctx, taskID, 50, "Discovering disks...")
		h.logger.Info("Starting disk sync", "task_id", taskID)

		if err := h.diskService.SyncDisksToDatabase(ctx); err != nil {
			h.logger.Error("Disk sync failed", "task_id", taskID, "error", err)
			h.taskEngine.FailTask(ctx, taskID, err.Error())
			return
		}

		h.logger.Info("Disk sync completed", "task_id", taskID)
		h.taskEngine.UpdateProgress(ctx, taskID, 100, "Disk sync completed")
		h.taskEngine.CompleteTask(ctx, taskID, "Disks synchronized successfully")
	}()

	c.JSON(http.StatusAccepted, gin.H{"task_id": taskID})
}

// ListVolumeGroups lists all volume groups
func (h *Handler) ListVolumeGroups(c *gin.Context) {
	vgs, err := h.lvmService.ListVolumeGroups(c.Request.Context())
	if err != nil {
		h.logger.Error("Failed to list volume groups", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to list volume groups"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"volume_groups": vgs})
}

// ListRepositories lists all repositories
func (h *Handler) ListRepositories(c *gin.Context) {
	repos, err := h.lvmService.ListRepositories(c.Request.Context())
	if err != nil {
		h.logger.Error("Failed to list repositories", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to list repositories"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"repositories": repos})
}

// GetRepository retrieves a repository by ID
func (h *Handler) GetRepository(c *gin.Context) {
	repoID := c.Param("id")

	repo, err := h.lvmService.GetRepository(c.Request.Context(), repoID)
	if err != nil {
		if err.Error() == "repository not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "repository not found"})
			return
		}
		h.logger.Error("Failed to get repository", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get repository"})
		return
	}

	c.JSON(http.StatusOK, repo)
}

// CreateRepositoryRequest represents a repository creation request
type CreateRepositoryRequest struct {
	Name        string `json:"name" binding:"required"`
	Description string `json:"description"`
	VolumeGroup string `json:"volume_group" binding:"required"`
	SizeGB      int64  `json:"size_gb" binding:"required"`
}

// CreateRepository creates a new repository
func (h *Handler) CreateRepository(c *gin.Context) {
	var req CreateRepositoryRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request"})
		return
	}

	userID, _ := c.Get("user_id")
	sizeBytes := req.SizeGB * 1024 * 1024 * 1024

	repo, err := h.lvmService.CreateRepository(
		c.Request.Context(),
		req.Name,
		req.VolumeGroup,
		sizeBytes,
		userID.(string),
	)
	if err != nil {
		h.logger.Error("Failed to create repository", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusCreated, repo)
}

// DeleteRepository deletes a repository
func (h *Handler) DeleteRepository(c *gin.Context) {
	repoID := c.Param("id")

	if err := h.lvmService.DeleteRepository(c.Request.Context(), repoID); err != nil {
		if err.Error() == "repository not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "repository not found"})
			return
		}
		h.logger.Error("Failed to delete repository", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "repository deleted successfully"})
}

// CreateZPoolRequest represents a ZFS pool creation request
type CreateZPoolRequest struct {
	Name          string   `json:"name" binding:"required"`
	Description   string   `json:"description"`
	RaidLevel     string   `json:"raid_level" binding:"required"` // stripe, mirror, raidz, raidz2, raidz3
	Disks         []string `json:"disks" binding:"required"`      // device paths
	Compression   string   `json:"compression"`                   // off, lz4, zstd, gzip
	Deduplication bool     `json:"deduplication"`
	AutoExpand    bool     `json:"auto_expand"`
}

// CreateZPool creates a new ZFS pool
func (h *Handler) CreateZPool(c *gin.Context) {
	var req CreateZPoolRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		h.logger.Error("Invalid request body", "error", err)
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request: " + err.Error()})
		return
	}

	// Validate required fields
	if req.Name == "" {
		c.JSON(http.StatusBadRequest, gin.H{"error": "pool name is required"})
		return
	}
	if req.RaidLevel == "" {
		c.JSON(http.StatusBadRequest, gin.H{"error": "raid_level is required"})
		return
	}
	if len(req.Disks) == 0 {
		c.JSON(http.StatusBadRequest, gin.H{"error": "at least one disk is required"})
		return
	}

	userID, exists := c.Get("user_id")
	if !exists {
		h.logger.Error("User ID not found in context")
		c.JSON(http.StatusUnauthorized, gin.H{"error": "authentication required"})
		return
	}

	userIDStr, ok := userID.(string)
	if !ok {
		h.logger.Error("Invalid user ID type", "type", fmt.Sprintf("%T", userID))
		c.JSON(http.StatusInternalServerError, gin.H{"error": "invalid user context"})
		return
	}

	// Set default compression if not provided
	if req.Compression == "" {
		req.Compression = "lz4"
	}

	h.logger.Info("Creating ZFS pool request", "name", req.Name, "raid_level", req.RaidLevel, "disks", req.Disks, "compression", req.Compression)

	pool, err := h.zfsService.CreatePool(
		c.Request.Context(),
		req.Name,
		req.RaidLevel,
		req.Disks,
		req.Compression,
		req.Deduplication,
		req.AutoExpand,
		userIDStr,
	)
	if err != nil {
		h.logger.Error("Failed to create ZFS pool", "error", err, "name", req.Name, "raid_level", req.RaidLevel, "disks", req.Disks)
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	h.logger.Info("ZFS pool created successfully", "pool_id", pool.ID, "name", pool.Name)
	c.JSON(http.StatusCreated, pool)
}

// ListZFSPools lists all ZFS pools
func (h *Handler) ListZFSPools(c *gin.Context) {
	pools, err := h.zfsService.ListPools(c.Request.Context())
	if err != nil {
		h.logger.Error("Failed to list ZFS pools", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to list ZFS pools"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"pools": pools})
}

// GetZFSPool retrieves a ZFS pool by ID
func (h *Handler) GetZFSPool(c *gin.Context) {
	poolID := c.Param("id")

	pool, err := h.zfsService.GetPool(c.Request.Context(), poolID)
	if err != nil {
		if err.Error() == "pool not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "pool not found"})
			return
		}
		h.logger.Error("Failed to get ZFS pool", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get ZFS pool"})
		return
	}

	c.JSON(http.StatusOK, pool)
}

// DeleteZFSPool deletes a ZFS pool
func (h *Handler) DeleteZFSPool(c *gin.Context) {
	poolID := c.Param("id")

	if err := h.zfsService.DeletePool(c.Request.Context(), poolID); err != nil {
		if err.Error() == "pool not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "pool not found"})
			return
		}
		h.logger.Error("Failed to delete ZFS pool", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	// Invalidate cache for pools list
	if h.cache != nil {
		cacheKey := "http:/api/v1/storage/zfs/pools:"
		h.cache.Delete(cacheKey)
		h.logger.Debug("Cache invalidated for pools list", "key", cacheKey)
	}

	c.JSON(http.StatusOK, gin.H{"message": "ZFS pool deleted successfully"})
}

// AddSpareDiskRequest represents a request to add spare disks to a pool
type AddSpareDiskRequest struct {
	Disks []string `json:"disks" binding:"required"`
}

// AddSpareDisk adds spare disks to a ZFS pool
func (h *Handler) AddSpareDisk(c *gin.Context) {
	poolID := c.Param("id")

	var req AddSpareDiskRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		h.logger.Error("Invalid add spare disk request", "error", err)
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request: " + err.Error()})
		return
	}

	if len(req.Disks) == 0 {
		c.JSON(http.StatusBadRequest, gin.H{"error": "at least one disk must be specified"})
		return
	}

	if err := h.zfsService.AddSpareDisk(c.Request.Context(), poolID, req.Disks); err != nil {
		if err.Error() == "pool not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "pool not found"})
			return
		}
		h.logger.Error("Failed to add spare disks", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "Spare disks added successfully"})
}

// ListZFSDatasets lists all datasets in a ZFS pool
func (h *Handler) ListZFSDatasets(c *gin.Context) {
	poolID := c.Param("id")

	// Get pool to get pool name
	pool, err := h.zfsService.GetPool(c.Request.Context(), poolID)
	if err != nil {
		if err.Error() == "pool not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "pool not found"})
			return
		}
		h.logger.Error("Failed to get pool", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get pool"})
		return
	}

	datasets, err := h.zfsService.ListDatasets(c.Request.Context(), pool.Name)
	if err != nil {
		h.logger.Error("Failed to list datasets", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	// Ensure we return an empty array instead of null
	if datasets == nil {
		datasets = []*ZFSDataset{}
	}

	c.JSON(http.StatusOK, gin.H{"datasets": datasets})
}

// CreateZFSDatasetRequest represents a request to create a ZFS dataset
type CreateZFSDatasetRequest struct {
	Name        string `json:"name" binding:"required"` // Dataset name (without pool prefix)
	Type        string `json:"type" binding:"required"` // "filesystem" or "volume"
	Compression string `json:"compression"`             // off, lz4, zstd, gzip, etc.
	Quota       int64  `json:"quota"`                   // -1 for unlimited, >0 for size
	Reservation int64  `json:"reservation"`             // 0 for none
	MountPoint  string `json:"mount_point"`             // Optional mount point
}

// CreateZFSDataset creates a new ZFS dataset in a pool
func (h *Handler) CreateZFSDataset(c *gin.Context) {
	poolID := c.Param("id")

	// Get pool to get pool name
	pool, err := h.zfsService.GetPool(c.Request.Context(), poolID)
	if err != nil {
		if err.Error() == "pool not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "pool not found"})
			return
		}
		h.logger.Error("Failed to get pool", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get pool"})
		return
	}

	var req CreateZFSDatasetRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		h.logger.Error("Invalid create dataset request", "error", err)
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request: " + err.Error()})
		return
	}

	// Validate type
	if req.Type != "filesystem" && req.Type != "volume" {
		c.JSON(http.StatusBadRequest, gin.H{"error": "type must be 'filesystem' or 'volume'"})
		return
	}

	// Validate mount point: volumes cannot have mount points
	if req.Type == "volume" && req.MountPoint != "" {
		c.JSON(http.StatusBadRequest, gin.H{"error": "mount point cannot be set for volume datasets (volumes are block devices for iSCSI export)"})
		return
	}

	// Validate dataset name (should not contain pool name)
	if strings.Contains(req.Name, "/") {
		c.JSON(http.StatusBadRequest, gin.H{"error": "dataset name should not contain '/' (pool name is automatically prepended)"})
		return
	}

	// Create dataset request - CreateDatasetRequest is in the same package (zfs.go)
	createReq := CreateDatasetRequest{
		Name:        req.Name,
		Type:        req.Type,
		Compression: req.Compression,
		Quota:       req.Quota,
		Reservation: req.Reservation,
		MountPoint:  req.MountPoint,
	}

	dataset, err := h.zfsService.CreateDataset(c.Request.Context(), pool.Name, createReq)
	if err != nil {
		h.logger.Error("Failed to create dataset", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusCreated, dataset)
}

// DeleteZFSDataset deletes a ZFS dataset
func (h *Handler) DeleteZFSDataset(c *gin.Context) {
	poolID := c.Param("id")
	datasetName := c.Param("dataset")

	// Get pool to get pool name
	pool, err := h.zfsService.GetPool(c.Request.Context(), poolID)
	if err != nil {
		if err.Error() == "pool not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "pool not found"})
			return
		}
		h.logger.Error("Failed to get pool", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get pool"})
		return
	}

	// Construct full dataset name
	fullDatasetName := pool.Name + "/" + datasetName

	// Verify dataset belongs to this pool
	if !strings.HasPrefix(fullDatasetName, pool.Name+"/") {
		c.JSON(http.StatusBadRequest, gin.H{"error": "dataset does not belong to this pool"})
		return
	}

	if err := h.zfsService.DeleteDataset(c.Request.Context(), fullDatasetName); err != nil {
		if strings.Contains(err.Error(), "does not exist") || strings.Contains(err.Error(), "not found") {
			c.JSON(http.StatusNotFound, gin.H{"error": "dataset not found"})
			return
		}
		h.logger.Error("Failed to delete dataset", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	// Invalidate cache for this pool's datasets list
	if h.cache != nil {
		// Generate cache key using the same format as cache middleware
		cacheKey := fmt.Sprintf("http:/api/v1/storage/zfs/pools/%s/datasets:", poolID)
		h.cache.Delete(cacheKey)
		// Also invalidate any cached responses with query parameters
		h.logger.Debug("Cache invalidated for dataset list", "pool_id", poolID, "key", cacheKey)
	}

	c.JSON(http.StatusOK, gin.H{"message": "Dataset deleted successfully"})
}

// GetARCStats returns ZFS ARC statistics
func (h *Handler) GetARCStats(c *gin.Context) {
	stats, err := h.arcService.GetARCStats(c.Request.Context())
	if err != nil {
		h.logger.Error("Failed to get ARC stats", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get ARC stats: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, stats)
}

// ListSnapshots lists all snapshots, optionally filtered by dataset
func (h *Handler) ListSnapshots(c *gin.Context) {
	datasetFilter := c.DefaultQuery("dataset", "")

	snapshots, err := h.snapshotService.ListSnapshots(c.Request.Context(), datasetFilter)
	if err != nil {
		h.logger.Error("Failed to list snapshots", "error", err, "dataset", datasetFilter)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to list snapshots: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"snapshots": snapshots})
}

// CreateSnapshotRequest represents a request to create a snapshot
type CreateSnapshotRequest struct {
	Dataset   string `json:"dataset" binding:"required"`
	Name      string `json:"name" binding:"required"`
	Recursive bool   `json:"recursive"`
}

// CreateSnapshot creates a new snapshot
func (h *Handler) CreateSnapshot(c *gin.Context) {
	var req CreateSnapshotRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		h.logger.Error("Invalid create snapshot request", "error", err)
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request: " + err.Error()})
		return
	}

	if err := h.snapshotService.CreateSnapshot(c.Request.Context(), req.Dataset, req.Name, req.Recursive); err != nil {
		h.logger.Error("Failed to create snapshot", "error", err, "dataset", req.Dataset, "name", req.Name)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to create snapshot: " + err.Error()})
		return
	}

	c.JSON(http.StatusCreated, gin.H{"message": "snapshot created successfully"})
}

// DeleteSnapshot deletes a snapshot
func (h *Handler) DeleteSnapshot(c *gin.Context) {
	snapshotName := c.Param("name")
	recursive := c.DefaultQuery("recursive", "false") == "true"

	if err := h.snapshotService.DeleteSnapshot(c.Request.Context(), snapshotName, recursive); err != nil {
		h.logger.Error("Failed to delete snapshot", "error", err, "snapshot", snapshotName)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to delete snapshot: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "snapshot deleted successfully"})
}

// RollbackSnapshotRequest represents a request to rollback to a snapshot
type RollbackSnapshotRequest struct {
	Force bool `json:"force"`
}

// RollbackSnapshot rolls back a dataset to a snapshot
func (h *Handler) RollbackSnapshot(c *gin.Context) {
	snapshotName := c.Param("name")

	var req RollbackSnapshotRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		// Default to false if not provided
		req.Force = false
	}

	if err := h.snapshotService.RollbackSnapshot(c.Request.Context(), snapshotName, req.Force); err != nil {
		h.logger.Error("Failed to rollback snapshot", "error", err, "snapshot", snapshotName)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to rollback snapshot: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "snapshot rollback completed successfully"})
}

// CloneSnapshotRequest represents a request to clone a snapshot
type CloneSnapshotRequest struct {
	CloneName string `json:"clone_name" binding:"required"`
}

// CloneSnapshot clones a snapshot to a new dataset
func (h *Handler) CloneSnapshot(c *gin.Context) {
	snapshotName := c.Param("name")

	var req CloneSnapshotRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		h.logger.Error("Invalid clone snapshot request", "error", err)
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request: " + err.Error()})
		return
	}

	if err := h.snapshotService.CloneSnapshot(c.Request.Context(), snapshotName, req.CloneName); err != nil {
		h.logger.Error("Failed to clone snapshot", "error", err, "snapshot", snapshotName, "clone", req.CloneName)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to clone snapshot: " + err.Error()})
		return
	}

	c.JSON(http.StatusCreated, gin.H{"message": "snapshot cloned successfully", "clone_name": req.CloneName})
}

// ListSnapshotSchedules lists all snapshot schedules
func (h *Handler) ListSnapshotSchedules(c *gin.Context) {
	schedules, err := h.snapshotScheduleService.ListSchedules(c.Request.Context())
	if err != nil {
		h.logger.Error("Failed to list snapshot schedules", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to list snapshot schedules: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"schedules": schedules})
}

// GetSnapshotSchedule retrieves a snapshot schedule by ID
func (h *Handler) GetSnapshotSchedule(c *gin.Context) {
	id := c.Param("id")

	schedule, err := h.snapshotScheduleService.GetSchedule(c.Request.Context(), id)
	if err != nil {
		if err.Error() == "schedule not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "schedule not found"})
			return
		}
		h.logger.Error("Failed to get snapshot schedule", "error", err, "id", id)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get snapshot schedule: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, schedule)
}

// CreateSnapshotScheduleRequest represents a request to create a snapshot schedule
type CreateSnapshotScheduleRequest struct {
	Name                 string                 `json:"name" binding:"required"`
	Dataset              string                 `json:"dataset" binding:"required"`
	SnapshotNameTemplate string                 `json:"snapshot_name_template" binding:"required"`
	ScheduleType         string                 `json:"schedule_type" binding:"required"`
	ScheduleConfig       map[string]interface{} `json:"schedule_config" binding:"required"`
	Recursive            bool                   `json:"recursive"`
	RetentionCount       *int                   `json:"retention_count"`
	RetentionDays        *int                   `json:"retention_days"`
}

// CreateSnapshotSchedule creates a new snapshot schedule
func (h *Handler) CreateSnapshotSchedule(c *gin.Context) {
	var req CreateSnapshotScheduleRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		h.logger.Error("Invalid create snapshot schedule request", "error", err)
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request: " + err.Error()})
		return
	}

	userID, _ := c.Get("user_id")
	userIDStr := ""
	if userID != nil {
		userIDStr = userID.(string)
	}

	schedule, err := h.snapshotScheduleService.CreateSchedule(c.Request.Context(), &CreateScheduleRequest{
		Name:                 req.Name,
		Dataset:              req.Dataset,
		SnapshotNameTemplate: req.SnapshotNameTemplate,
		ScheduleType:         req.ScheduleType,
		ScheduleConfig:       req.ScheduleConfig,
		Recursive:            req.Recursive,
		RetentionCount:       req.RetentionCount,
		RetentionDays:        req.RetentionDays,
	}, userIDStr)
	if err != nil {
		h.logger.Error("Failed to create snapshot schedule", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to create snapshot schedule: " + err.Error()})
		return
	}

	c.JSON(http.StatusCreated, schedule)
}

// UpdateSnapshotSchedule updates an existing snapshot schedule
func (h *Handler) UpdateSnapshotSchedule(c *gin.Context) {
	id := c.Param("id")

	var req CreateSnapshotScheduleRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		h.logger.Error("Invalid update snapshot schedule request", "error", err)
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request: " + err.Error()})
		return
	}

	schedule, err := h.snapshotScheduleService.UpdateSchedule(c.Request.Context(), id, &CreateScheduleRequest{
		Name:                 req.Name,
		Dataset:              req.Dataset,
		SnapshotNameTemplate: req.SnapshotNameTemplate,
		ScheduleType:         req.ScheduleType,
		ScheduleConfig:       req.ScheduleConfig,
		Recursive:            req.Recursive,
		RetentionCount:       req.RetentionCount,
		RetentionDays:        req.RetentionDays,
	})
	if err != nil {
		if err.Error() == "schedule not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "schedule not found"})
			return
		}
		h.logger.Error("Failed to update snapshot schedule", "error", err, "id", id)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to update snapshot schedule: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, schedule)
}

// DeleteSnapshotSchedule deletes a snapshot schedule
func (h *Handler) DeleteSnapshotSchedule(c *gin.Context) {
	id := c.Param("id")

	if err := h.snapshotScheduleService.DeleteSchedule(c.Request.Context(), id); err != nil {
		if err.Error() == "schedule not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "schedule not found"})
			return
		}
		h.logger.Error("Failed to delete snapshot schedule", "error", err, "id", id)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to delete snapshot schedule: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "snapshot schedule deleted successfully"})
}

// ToggleSnapshotSchedule enables or disables a snapshot schedule
func (h *Handler) ToggleSnapshotSchedule(c *gin.Context) {
	id := c.Param("id")

	var req struct {
		Enabled bool `json:"enabled" binding:"required"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		h.logger.Error("Invalid toggle snapshot schedule request", "error", err)
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request: " + err.Error()})
		return
	}

	if err := h.snapshotScheduleService.ToggleSchedule(c.Request.Context(), id, req.Enabled); err != nil {
		if err.Error() == "schedule not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "schedule not found"})
			return
		}
		h.logger.Error("Failed to toggle snapshot schedule", "error", err, "id", id)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to toggle snapshot schedule: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "snapshot schedule toggled successfully"})
}

// ListReplicationTasks lists all replication tasks
func (h *Handler) ListReplicationTasks(c *gin.Context) {
	direction := c.Query("direction") // Optional filter: "outbound" or "inbound"
	tasks, err := h.replicationService.ListReplicationTasks(c.Request.Context(), direction)
	if err != nil {
		h.logger.Error("Failed to list replication tasks", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to list replication tasks: " + err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"tasks": tasks})
}

// GetReplicationTask retrieves a replication task by ID
func (h *Handler) GetReplicationTask(c *gin.Context) {
	id := c.Param("id")
	task, err := h.replicationService.GetReplicationTask(c.Request.Context(), id)
	if err != nil {
		if err.Error() == "replication task not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "replication task not found"})
			return
		}
		h.logger.Error("Failed to get replication task", "error", err, "id", id)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get replication task: " + err.Error()})
		return
	}
	c.JSON(http.StatusOK, task)
}

// CreateReplicationTaskRequest represents a request to create a replication task
type CreateReplicationTaskRequest struct {
	Name             string                 `json:"name" binding:"required"`
	Direction        string                 `json:"direction" binding:"required"`
	SourceDataset    *string                `json:"source_dataset"`
	TargetHost       *string                `json:"target_host"`
	TargetPort       *int                   `json:"target_port"`
	TargetUser       *string                `json:"target_user"`
	TargetDataset    *string                `json:"target_dataset"`
	TargetSSHKeyPath *string                `json:"target_ssh_key_path"`
	SourceHost       *string                `json:"source_host"`
	SourcePort       *int                   `json:"source_port"`
	SourceUser       *string                `json:"source_user"`
	LocalDataset     *string                `json:"local_dataset"`
	ScheduleType     *string                `json:"schedule_type"`
	ScheduleConfig   map[string]interface{} `json:"schedule_config"`
	Compression      string                 `json:"compression"`
	Encryption       bool                   `json:"encryption"`
	Recursive        bool                   `json:"recursive"`
	Incremental      bool                   `json:"incremental"`
	AutoSnapshot     bool                   `json:"auto_snapshot"`
	Enabled          bool                   `json:"enabled"`
}

// CreateReplicationTask creates a new replication task
func (h *Handler) CreateReplicationTask(c *gin.Context) {
	var req CreateReplicationTaskRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		h.logger.Error("Invalid create replication task request", "error", err)
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request: " + err.Error()})
		return
	}

	userID, _ := c.Get("user_id")
	userIDStr := ""
	if userID != nil {
		userIDStr = userID.(string)
	}

	task, err := h.replicationService.CreateReplicationTask(c.Request.Context(), &CreateReplicationRequest{
		Name:             req.Name,
		Direction:        req.Direction,
		SourceDataset:    req.SourceDataset,
		TargetHost:       req.TargetHost,
		TargetPort:       req.TargetPort,
		TargetUser:       req.TargetUser,
		TargetDataset:    req.TargetDataset,
		TargetSSHKeyPath: req.TargetSSHKeyPath,
		SourceHost:       req.SourceHost,
		SourcePort:       req.SourcePort,
		SourceUser:       req.SourceUser,
		LocalDataset:     req.LocalDataset,
		ScheduleType:     req.ScheduleType,
		ScheduleConfig:   req.ScheduleConfig,
		Compression:      req.Compression,
		Encryption:       req.Encryption,
		Recursive:        req.Recursive,
		Incremental:      req.Incremental,
		AutoSnapshot:     req.AutoSnapshot,
		Enabled:          req.Enabled,
	}, userIDStr)
	if err != nil {
		h.logger.Error("Failed to create replication task", "error", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to create replication task: " + err.Error()})
		return
	}

	c.JSON(http.StatusCreated, task)
}

// UpdateReplicationTask updates an existing replication task
func (h *Handler) UpdateReplicationTask(c *gin.Context) {
	id := c.Param("id")
	var req CreateReplicationTaskRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		h.logger.Error("Invalid update replication task request", "error", err)
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request: " + err.Error()})
		return
	}

	task, err := h.replicationService.UpdateReplicationTask(c.Request.Context(), id, &CreateReplicationRequest{
		Name:             req.Name,
		Direction:        req.Direction,
		SourceDataset:    req.SourceDataset,
		TargetHost:       req.TargetHost,
		TargetPort:       req.TargetPort,
		TargetUser:       req.TargetUser,
		TargetDataset:    req.TargetDataset,
		TargetSSHKeyPath: req.TargetSSHKeyPath,
		SourceHost:       req.SourceHost,
		SourcePort:       req.SourcePort,
		SourceUser:       req.SourceUser,
		LocalDataset:     req.LocalDataset,
		ScheduleType:     req.ScheduleType,
		ScheduleConfig:   req.ScheduleConfig,
		Compression:      req.Compression,
		Encryption:       req.Encryption,
		Recursive:        req.Recursive,
		Incremental:      req.Incremental,
		AutoSnapshot:     req.AutoSnapshot,
		Enabled:          req.Enabled,
	})
	if err != nil {
		if err.Error() == "replication task not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "replication task not found"})
			return
		}
		h.logger.Error("Failed to update replication task", "error", err, "id", id)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to update replication task: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, task)
}

// DeleteReplicationTask deletes a replication task
func (h *Handler) DeleteReplicationTask(c *gin.Context) {
	id := c.Param("id")
	if err := h.replicationService.DeleteReplicationTask(c.Request.Context(), id); err != nil {
		if err.Error() == "replication task not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "replication task not found"})
			return
		}
		h.logger.Error("Failed to delete replication task", "error", err, "id", id)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to delete replication task: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "replication task deleted successfully"})
}