package tracker

type (
	Bool struct {
		value   BoolValue
		enabler Enabler
	}

	BoolValue interface {
		Value() bool
		SetValue(bool)
	}

	Panic           Model
	IsRecording     Model
	Playing         Model
	InstrEnlarged   Model
	Effect          Model
	TrackMidiIn     Model
	CommentExpanded Model
	Follow          Model
	UnitSearching   Model
	UnitDisabled    Model
	LoopToggle      Model
	UniquePatterns  Model
	Mute            Model
	Solo            Model
	LinkInstrTrack  Model
	Oversampling    Model
)

func MakeBool(valueEnabler interface {
	BoolValue
	Enabler
}) Bool {
	return Bool{value: valueEnabler, enabler: valueEnabler}
}

func MakeEnabledBool(value BoolValue) Bool {
	return Bool{value: value, enabler: nil}
}

func (v Bool) Toggle() {
	v.SetValue(!v.Value())
}

func (v Bool) SetValue(value bool) {
	if v.Enabled() && v.Value() != value {
		v.value.SetValue(value)
	}
}

func (v Bool) Value() bool {
	if v.value == nil {
		return false
	}
	return v.value.Value()
}

func (v Bool) Enabled() bool {
	if v.enabler == nil {
		return true
	}
	return v.enabler.Enabled()
}

// Model methods

// Panic methods

func (m *Model) Panic() Bool { return MakeEnabledBool((*Panic)(m)) }
func (m *Panic) Value() bool { return m.panic }
func (m *Panic) SetValue(val bool) {
	(*Model)(m).setPanic(val)
}

// IsRecording methods

func (m *Model) IsRecording() Bool { return MakeEnabledBool((*IsRecording)(m)) }
func (m *IsRecording) Value() bool { return (*Model)(m).recording }
func (m *IsRecording) SetValue(val bool) {
	m.recording = val
	m.instrEnlarged = val
	TrySend(m.broker.ToPlayer, any(RecordingMsg{val}))
}

// Playing methods

func (m *Model) Playing() Bool { return MakeBool((*Playing)(m)) }
func (m *Playing) Value() bool { return m.playing }
func (m *Playing) SetValue(val bool) {
	m.playing = val
	if m.playing {
		(*Model)(m).setPanic(false)
		TrySend(m.broker.ToPlayer, any(StartPlayMsg{m.d.Cursor.SongPos}))
	} else {
		TrySend(m.broker.ToPlayer, any(IsPlayingMsg{val}))
	}
}
func (m *Playing) Enabled() bool { return m.playing || !m.instrEnlarged }

// InstrEnlarged methods

func (m *Model) InstrEnlarged() Bool       { return MakeEnabledBool((*InstrEnlarged)(m)) }
func (m *InstrEnlarged) Value() bool       { return m.instrEnlarged }
func (m *InstrEnlarged) SetValue(val bool) { m.instrEnlarged = val }

// CommentExpanded methods

func (m *Model) CommentExpanded() Bool       { return MakeEnabledBool((*CommentExpanded)(m)) }
func (m *CommentExpanded) Value() bool       { return m.commentExpanded }
func (m *CommentExpanded) SetValue(val bool) { m.commentExpanded = val }

// Follow methods

func (m *Model) Follow() Bool       { return MakeEnabledBool((*Follow)(m)) }
func (m *Follow) Value() bool       { return m.follow }
func (m *Follow) SetValue(val bool) { m.follow = val }

// TrackMidiIn (Midi Input for notes in the tracks)

func (m *Model) TrackMidiIn() Bool       { return MakeBool((*TrackMidiIn)(m)) }
func (m *TrackMidiIn) Value() bool       { return m.trackMidiIn }
func (m *TrackMidiIn) SetValue(val bool) { m.trackMidiIn = val }
func (m *TrackMidiIn) Enabled() bool     { return m.MIDI.HasDeviceOpen() }

// Effect methods

func (m *Model) Effect() Bool { return MakeEnabledBool((*Effect)(m)) }
func (m *Effect) Value() bool {
	if m.d.Cursor.Track < 0 || m.d.Cursor.Track >= len(m.d.Song.Score.Tracks) {
		return false
	}
	return m.d.Song.Score.Tracks[m.d.Cursor.Track].Effect
}
func (m *Effect) SetValue(val bool) {
	if m.d.Cursor.Track < 0 || m.d.Cursor.Track >= len(m.d.Song.Score.Tracks) {
		return
	}
	m.d.Song.Score.Tracks[m.d.Cursor.Track].Effect = val
}

// Oversampling methods

func (m *Model) Oversampling() Bool { return MakeEnabledBool((*Oversampling)(m)) }
func (m *Oversampling) Value() bool { return m.oversampling }
func (m *Oversampling) SetValue(val bool) {
	m.oversampling = val
	TrySend(m.broker.ToDetector, MsgToDetector{HasOversampling: true, Oversampling: val})
}

// UnitSearching methods

func (m *Model) UnitSearching() Bool { return MakeEnabledBool((*UnitSearching)(m)) }
func (m *UnitSearching) Value() bool { return m.d.UnitSearching }
func (m *UnitSearching) SetValue(val bool) {
	m.d.UnitSearching = val
	if m.d.InstrIndex < 0 || m.d.InstrIndex >= len(m.d.Song.Patch) {
		m.d.UnitSearchString = ""
		return
	}
	if m.d.UnitIndex < 0 || m.d.UnitIndex >= len(m.d.Song.Patch[m.d.InstrIndex].Units) {
		m.d.UnitSearchString = ""
		return
	}
	m.d.UnitSearchString = m.d.Song.Patch[m.d.InstrIndex].Units[m.d.UnitIndex].Type
}

// UnitDisabled methods

func (m *Model) UnitDisabled() Bool { return MakeBool((*UnitDisabled)(m)) }
func (m *UnitDisabled) Value() bool {
	if m.d.InstrIndex < 0 || m.d.InstrIndex >= len(m.d.Song.Patch) {
		return false
	}
	if m.d.UnitIndex < 0 || m.d.UnitIndex >= len(m.d.Song.Patch[m.d.InstrIndex].Units) {
		return false
	}
	return m.d.Song.Patch[m.d.InstrIndex].Units[m.d.UnitIndex].Disabled
}
func (m *UnitDisabled) SetValue(val bool) {
	if m.d.InstrIndex < 0 || m.d.InstrIndex >= len(m.d.Song.Patch) {
		return
	}
	l := ((*Model)(m)).Units().List()
	r := l.listRange()
	defer (*Model)(m).change("UnitDisabledSet", PatchChange, MajorChange)()
	for i := r.Start; i < r.End; i++ {
		m.d.Song.Patch[m.d.InstrIndex].Units[i].Disabled = val
	}
}
func (m *UnitDisabled) Enabled() bool {
	if m.d.InstrIndex < 0 || m.d.InstrIndex >= len(m.d.Song.Patch) {
		return false
	}
	if len(m.d.Song.Patch[m.d.InstrIndex].Units) == 0 {
		return false
	}
	return true
}

// LoopToggle methods

func (m *Model) LoopToggle() Bool { return MakeEnabledBool((*LoopToggle)(m)) }
func (m *LoopToggle) Value() bool { return m.loop.Length > 0 }
func (t *LoopToggle) SetValue(val bool) {
	m := (*Model)(t)
	newLoop := Loop{}
	if val {
		l := m.OrderRows().List()
		r := l.listRange()
		newLoop = Loop{r.Start, r.End - r.Start}
	}
	m.setLoop(newLoop)
}

// UniquePatterns methods

func (m *Model) UniquePatterns() Bool       { return MakeEnabledBool((*UniquePatterns)(m)) }
func (m *UniquePatterns) Value() bool       { return m.uniquePatterns }
func (m *UniquePatterns) SetValue(val bool) { m.uniquePatterns = val }

// Mute methods
func (m *Model) Mute() Bool { return MakeBool((*Mute)(m)) }
func (m *Mute) Value() bool {
	if m.d.InstrIndex < 0 || m.d.InstrIndex >= len(m.d.Song.Patch) {
		return false
	}
	return m.d.Song.Patch[m.d.InstrIndex].Mute
}
func (m *Mute) SetValue(val bool) {
	if m.d.InstrIndex < 0 || m.d.InstrIndex >= len(m.d.Song.Patch) {
		return
	}
	defer (*Model)(m).change("Mute", PatchChange, MinorChange)()
	a, b := min(m.d.InstrIndex, m.d.InstrIndex2), max(m.d.InstrIndex, m.d.InstrIndex2)
	for i := a; i <= b; i++ {
		if i < 0 || i >= len(m.d.Song.Patch) {
			continue
		}
		m.d.Song.Patch[i].Mute = val
	}
}
func (m *Mute) Enabled() bool { return m.d.InstrIndex >= 0 && m.d.InstrIndex < len(m.d.Song.Patch) }

// Solo methods

func (m *Model) Solo() Bool { return MakeBool((*Solo)(m)) }
func (m *Solo) Value() bool {
	a, b := min(m.d.InstrIndex, m.d.InstrIndex2), max(m.d.InstrIndex, m.d.InstrIndex2)
	for i := range m.d.Song.Patch {
		if i < 0 || i >= len(m.d.Song.Patch) {
			continue
		}
		if (i >= a && i <= b) == m.d.Song.Patch[i].Mute {
			return false
		}
	}
	return true
}
func (m *Solo) SetValue(val bool) {
	defer (*Model)(m).change("Solo", PatchChange, MinorChange)()
	a, b := min(m.d.InstrIndex, m.d.InstrIndex2), max(m.d.InstrIndex, m.d.InstrIndex2)
	for i := range m.d.Song.Patch {
		if i < 0 || i >= len(m.d.Song.Patch) {
			continue
		}
		m.d.Song.Patch[i].Mute = !(i >= a && i <= b) && val
	}
}
func (m *Solo) Enabled() bool { return m.d.InstrIndex >= 0 && m.d.InstrIndex < len(m.d.Song.Patch) }

// LinkInstrTrack methods

func (m *Model) LinkInstrTrack() Bool       { return MakeEnabledBool((*LinkInstrTrack)(m)) }
func (m *LinkInstrTrack) Value() bool       { return m.linkInstrTrack }
func (m *LinkInstrTrack) SetValue(val bool) { m.linkInstrTrack = val }