package models

import (
	"time"
)

// FileInfo represents a file in the backup system
type FileInfo struct {
	Path  string
	MTime time.Time
	Size  int64
}

// ChunkInfo represents a content-addressed chunk
type ChunkInfo struct {
	Hash   string // SHA256 hash
	Size   int64
	Offset int64 // Offset within source file
}

// ChunkRef represents a reference to a chunk in a blob or file
type ChunkRef struct {
	ChunkHash string
	Offset    int64
	Length    int64
}

// BlobInfo represents an encrypted blob containing multiple chunks
type BlobInfo struct {
	Hash       string // SHA256 hash of the blob content (content-addressable)
	CreatedAt  time.Time
	Size       int64
	ChunkCount int
}

// Snapshot represents a backup snapshot
type Snapshot struct {
	ID           string // ISO8601 timestamp
	Hostname     string
	Version      string
	CreatedAt    time.Time
	FileCount    int64
	ChunkCount   int64
	BlobCount    int64
	TotalSize    int64
	MetadataSize int64
}

// SnapshotMetadata contains the full metadata for a snapshot
type SnapshotMetadata struct {
	Snapshot   *Snapshot
	Files      map[string]*FileInfo
	Chunks     map[string]*ChunkInfo
	Blobs      map[string]*BlobInfo
	FileChunks map[string][]*ChunkRef // path -> chunks
	BlobChunks map[string][]*ChunkRef // blob hash -> chunks
}

// Chunk represents a data chunk for processing
type Chunk struct {
	Data   []byte
	Hash   string
	Offset int64
	Length int64
}

// DirtyPath represents a path marked for backup by inotify
type DirtyPath struct {
	Path      string
	MarkedAt  time.Time
	EventType string // "create", "modify", "delete"
}