package scanner

// ScanResult contains the outcome of scanning a media folder.
type ScanResult struct {
	New                int
	Updated            int
	Unchanged          int
	Missing            int
	FilesDeleted       int
	MembershipsRemoved int
	ItemsDeleted       int
	Errors             int
	EmptyRootGuarded   bool
	// MissingSkippedProtected counts files the scan did not find on disk but
	// left alone because they sit under an unreachable or suspect-empty root.
	// A non-zero value means the library is partly offline, not partly gone.
	MissingSkippedProtected int
	// UnreachableRoots lists configured library roots that failed the
	// reachability probe at scan start. Files under them are left untouched:
	// not marked missing, not trashed, and not purged. A root that does not
	// answer tells us nothing about whether its files still exist, and
	// marking them missing would hide working titles from every catalog read
	// until the next successful scan.
	UnreachableRoots []string
	// SuspectEmptyRoots lists roots that probed reachable but were literally
	// empty directories while the library still holds cataloged files under
	// them — the signature of a lost mount exposing its bare mountpoint
	// directory. They receive the same exemptions as UnreachableRoots until
	// the operator confirms cleanup or the files return.
	SuspectEmptyRoots []string
	RootObservations  []RootObservation
}

// FileHints contains the OSHash gathered during scanning.
type FileHints struct {
	FileHash string // OSHash from xattr or computed
}

// ProbeData contains media file technical information from ffprobe.
type ProbeData struct {
	CodecVideo     string
	CodecAudio     string
	Resolution     string // 1080p, 2160p, etc.
	AudioChannels  int
	HDR            bool
	Container      string
	Duration       int // seconds
	Bitrate        int // kbps
	VideoTracks    []VideoTrackInfo
	AudioTracks    []AudioTrackInfo
	SubtitleTracks []SubtitleTrackInfo
	Chapters       []ChapterInfo
	FormatTags     map[string]string // format-level tags from ffprobe (title, artist, album, date, etc.)
}

// VideoTrackInfo describes a probed video track.
type VideoTrackInfo struct {
	Title              string
	Codec              string
	DolbyVision        string
	DVProfile          int
	DVLevel            int
	DVBLCompatID       int
	DVELPresent        bool
	DVEnhancementLayer string
	HDR10Plus          bool
	Profile            string
	Level              int
	Width              int
	Height             int
	AspectRatio        string
	Interlaced         bool
	FrameRate          string
	Bitrate            int
	VideoRange         string
	VideoRangeType     string
	ColorRange         string
	ColorPrimaries     string
	ColorSpace         string
	ColorTransfer      string
	BitDepth           int
	PixelFormat        string
	ReferenceFrames    int
}

// AudioTrackInfo describes a probed audio track.
type AudioTrackInfo struct {
	Title         string
	EmbeddedTitle string
	Language      string
	Codec         string
	Profile       string
	Layout        string
	Channels      int
	Bitrate       int
	SampleRate    int
	BitDepth      int
	Default       bool
}

// SubtitleTrackInfo describes an embedded subtitle track from probing.
type SubtitleTrackInfo struct {
	Index           int
	Language        string
	Codec           string
	Title           string
	EmbeddedTitle   string
	Resolution      string
	Forced          bool
	Default         bool
	HearingImpaired bool
}

// ExternalSubtitleInfo describes a discovered sidecar subtitle file.
type ExternalSubtitleInfo struct {
	Path     string
	Language string
	Format   string // srt, vtt, ass, ssa, sub
	Title    string
	Forced   bool
}

// ChapterInfo describes an embedded chapter extracted from ffprobe.
type ChapterInfo struct {
	Index        int
	Title        string
	StartSeconds float64
	EndSeconds   float64
	Source       string
}

// IntroCreditsMarkers contains intro/credits timing from S3 markers.
type IntroCreditsMarkers struct {
	IntroStart   *float64
	IntroEnd     *float64
	CreditsStart *float64
	CreditsEnd   *float64
}

// MarkerUpdate is the narrow marker-only update payload shared by scanner and analyzers.
type MarkerUpdate struct {
	IntroStart        *float64
	IntroEnd          *float64
	CreditsStart      *float64
	CreditsEnd        *float64
	RecapStart        *float64
	RecapEnd          *float64
	PreviewStart      *float64
	PreviewEnd        *float64
	MarkersSource     string
	MarkersProvider   *string
	MarkersConfidence *float64
	MarkersAlgorithm  string

	// Optional per-segment provenance overrides. When set for a segment,
	// UpsertMarkers writes these source/provider/confidence/algorithm values
	// for that segment instead of the shared Markers* fields above. Used by
	// merged multi-provider results where each segment may come from a
	// different provider/source class; left nil for single-source writes
	// (scanner/s3/local).
	IntroProvenance   *SegmentProvenance
	CreditsProvenance *SegmentProvenance
	RecapProvenance   *SegmentProvenance
	PreviewProvenance *SegmentProvenance
}

// SegmentProvenance is a per-segment attribution override for MarkerUpdate.
// When Source is empty, the shared MarkerUpdate.MarkersSource applies.
type SegmentProvenance struct {
	Source     string
	Provider   *string
	Confidence *float64
	Algorithm  string
}

// HasAnySegment reports whether the update would write at least one segment.
// An update with no segment bounds set is a no-op and skipped by UpsertMarkers.
func (u MarkerUpdate) HasAnySegment() bool {
	return u.IntroStart != nil || u.IntroEnd != nil ||
		u.CreditsStart != nil || u.CreditsEnd != nil ||
		u.RecapStart != nil || u.RecapEnd != nil ||
		u.PreviewStart != nil || u.PreviewEnd != nil
}