package devices

import (
	"context"
	"strings"

	"git.zeroonesoft.cn/golib/xiaomihome/miot"
	"git.zeroonesoft.cn/golib/xiaomihome/xiaomi"
)

// Speaker 音箱通用控制接口
type Speaker interface {
	Device
	TurnOn(ctx context.Context) error
	TurnOff(ctx context.Context) error
	Toggle(ctx context.Context) error

	// 能力查询
	HasVolume() bool
	HasMute() bool
	HasPlayControl() bool

	// 音量 (0-100)
	SetVolume(ctx context.Context, pct int) error
	GetVolume(ctx context.Context) (int, error)

	// 静音
	SetMute(ctx context.Context, mute bool) error
	GetMute(ctx context.Context) (bool, error)

	// 播放控制 (0=停止, 1=播放, 2=暂停)
	SetPlayState(ctx context.Context, state int) error
	GetPlayState(ctx context.Context) (int, error)

	// ── 智能音箱 (intelligent-speaker) ──

	// 睡眠模式
	HasSleepMode() bool
	SetSleepMode(ctx context.Context, sleep bool) error
	GetSleepMode(ctx context.Context) (bool, error)

	// 音频 ID (只读/通知)
	GetAudioID(ctx context.Context) (string, error)

	// 动作
	WakeUp(ctx context.Context) error
	PlayRadio(ctx context.Context) error
	PlayText(ctx context.Context, text string) error
	ExecuteTextDirective(ctx context.Context, text string, silent bool) error
	PlayMusic(ctx context.Context) error

	OnPropsChanged(handler func(props SpeakerProps, changed string)) (string, error)
	GetProps() SpeakerProps
	FetchProps(ctx context.Context) (SpeakerProps, error)
}

// SpeakerProps 音箱完整状态（字段名对齐 SPEC type）
type SpeakerProps struct {
	On        bool   `json:"on"`        // SPEC: "on"
	Volume    int    `json:"volume"`    // SPEC: "volume"
	Mute      bool   `json:"mute"`      // SPEC: "mute"
	PlayState int    `json:"playState"` // SPEC: "tds-in" or "playing-state" (0=stop,1=play,2=pause)
	SleepMode bool   `json:"sleepMode"` // SPEC: "sleep-mode" (intelligent-speaker)
	AudioID   string `json:"audioId"`   // SPEC: "audio-id" (intelligent-speaker, read-only)
}

// isAction 智能音箱动作 siid/aiid 对
type isAction struct{ siid, aiid int }

type speakerDevice struct {
	BaseDevice
	propOn        siidPiid // "on"
	propVolume    siidPiid // "volume"
	propMute      siidPiid // "mute"
	propPlayState siidPiid // "playing-state" or "tds-in"
	propSleepMode siidPiid // "sleep-mode" (intelligent-speaker)
	propAudioID   siidPiid // "audio-id" (intelligent-speaker)

	// intelligent-speaker 服务 siid
	isSiid int

	// 动作
	actWakeUp               isAction
	actPlayRadio            isAction
	actPlayText             isAction
	actExecuteTextDirective isAction
	actPlayMusic            isAction

	propsCache SpeakerProps
}

// NewSpeaker creates a Speaker control for the given device.
func NewSpeaker(client *xiaomi.Client, info *xiaomi.DeviceInfo) (Speaker, error) {
	d := &speakerDevice{
		BaseDevice: NewBaseDevice(client, info),
	}

	dev := d.getMIoTDevice()
	if dev == nil {
		return nil, xiaomi.ErrNoSPEC
	}
	spec := dev.SpecInstance()
	if spec == nil {
		return nil, xiaomi.ErrNoSPEC
	}

	// 定位 intelligent-speaker 服务
	var isSvc *miot.MIoTSpecService
	for _, svc := range spec.Services {
		if shortName(svc.Type) == "intelligent-speaker" {
			isSvc = svc
			d.isSiid = svc.IID
			break
		}
	}

	// 先用 resolver 解析通用属性
	resolver := d.getSpecResolver()
	if resolver == nil {
		return nil, xiaomi.ErrNoSPEC
	}

	siid, piid, ok := resolver.find("on")
	if !ok {
		return nil, xiaomi.ErrNotSupported
	}
	d.propOn = siidPiid{siid, piid, true}

	if s, p, ok := resolver.find("volume"); ok {
		d.propVolume = siidPiid{s, p, true}
	}
	if s, p, ok := resolver.find("mute"); ok {
		d.propMute = siidPiid{s, p, true}
	}
	if s, p, ok := resolver.find("playing-state"); ok {
		d.propPlayState = siidPiid{s, p, true}
	} else if s, p, ok := resolver.find("tds-in"); ok {
		d.propPlayState = siidPiid{s, p, true}
	}

	// intelligent-speaker 属性
	if isSvc != nil {
		for _, p := range isSvc.Properties {
			switch shortName(p.Type) {
			case "sleep-mode":
				d.propSleepMode = siidPiid{d.isSiid, p.PIID, true}
			case "audio-id":
				d.propAudioID = siidPiid{d.isSiid, p.PIID, true}
			}
		}
		// 动作
		for _, a := range isSvc.Actions {
			switch shortName(a.Type) {
			case "wake-up":
				d.actWakeUp = isAction{d.isSiid, a.AIID}
			case "play-radio":
				d.actPlayRadio = isAction{d.isSiid, a.AIID}
			case "play-text":
				d.actPlayText = isAction{d.isSiid, a.AIID}
			case "execute-text-directive":
				d.actExecuteTextDirective = isAction{d.isSiid, a.AIID}
			case "play-music":
				d.actPlayMusic = isAction{d.isSiid, a.AIID}
			}
		}
	}

	return d, nil
}

func (d *speakerDevice) TurnOn(ctx context.Context) error {
	if !d.propOn.valid {
		return xiaomi.ErrNotSupported
	}
	return d.SetProp(ctx, d.propOn.siid, d.propOn.piid, true)
}

func (d *speakerDevice) TurnOff(ctx context.Context) error {
	if !d.propOn.valid {
		return xiaomi.ErrNotSupported
	}
	return d.SetProp(ctx, d.propOn.siid, d.propOn.piid, false)
}

func (d *speakerDevice) Toggle(ctx context.Context) error {
	s := d.GetProps()
	if s.On {
		return d.TurnOff(ctx)
	}
	return d.TurnOn(ctx)
}

func (d *speakerDevice) HasVolume() bool      { return d.propVolume.valid }
func (d *speakerDevice) HasMute() bool        { return d.propMute.valid }
func (d *speakerDevice) HasPlayControl() bool { return d.propPlayState.valid }

func (d *speakerDevice) SetVolume(ctx context.Context, pct int) error {
	if !d.propVolume.valid {
		return xiaomi.ErrNotSupported
	}
	return d.SetProp(ctx, d.propVolume.siid, d.propVolume.piid, pct)
}

func (d *speakerDevice) GetVolume(ctx context.Context) (int, error) {
	if !d.propVolume.valid {
		return 0, xiaomi.ErrNotSupported
	}
	prop, err := d.GetProp(ctx, d.propVolume.siid, d.propVolume.piid)
	if err != nil {
		return 0, err
	}
	return toInt(prop.Value), nil
}

func (d *speakerDevice) SetMute(ctx context.Context, mute bool) error {
	if !d.propMute.valid {
		return xiaomi.ErrNotSupported
	}
	return d.SetProp(ctx, d.propMute.siid, d.propMute.piid, mute)
}

func (d *speakerDevice) GetMute(ctx context.Context) (bool, error) {
	if !d.propMute.valid {
		return false, xiaomi.ErrNotSupported
	}
	prop, err := d.GetProp(ctx, d.propMute.siid, d.propMute.piid)
	if err != nil {
		return false, err
	}
	if b, ok := prop.Value.(bool); ok {
		return b, nil
	}
	return false, nil
}

func (d *speakerDevice) SetPlayState(ctx context.Context, state int) error {
	if !d.propPlayState.valid {
		return xiaomi.ErrNotSupported
	}
	return d.SetProp(ctx, d.propPlayState.siid, d.propPlayState.piid, state)
}

func (d *speakerDevice) GetPlayState(ctx context.Context) (int, error) {
	if !d.propPlayState.valid {
		return 0, xiaomi.ErrNotSupported
	}
	prop, err := d.GetProp(ctx, d.propPlayState.siid, d.propPlayState.piid)
	if err != nil {
		return 0, err
	}
	return toInt(prop.Value), nil
}

// ── 智能音箱属性 ──

func (d *speakerDevice) HasSleepMode() bool { return d.propSleepMode.valid }

func (d *speakerDevice) SetSleepMode(ctx context.Context, sleep bool) error {
	if !d.propSleepMode.valid {
		return xiaomi.ErrNotSupported
	}
	return d.SetProp(ctx, d.propSleepMode.siid, d.propSleepMode.piid, sleep)
}

func (d *speakerDevice) GetSleepMode(ctx context.Context) (bool, error) {
	if !d.propSleepMode.valid {
		return false, xiaomi.ErrNotSupported
	}
	prop, err := d.GetProp(ctx, d.propSleepMode.siid, d.propSleepMode.piid)
	if err != nil {
		return false, err
	}
	if b, ok := prop.Value.(bool); ok {
		return b, nil
	}
	return false, nil
}

func (d *speakerDevice) GetAudioID(ctx context.Context) (string, error) {
	if !d.propAudioID.valid {
		return "", xiaomi.ErrNotSupported
	}
	prop, err := d.GetProp(ctx, d.propAudioID.siid, d.propAudioID.piid)
	if err != nil {
		return "", err
	}
	if s, ok := prop.Value.(string); ok {
		return s, nil
	}
	return "", nil
}

// ── 智能音箱动作 ──

func (d *speakerDevice) WakeUp(ctx context.Context) error {
	if d.actWakeUp.siid == 0 {
		return xiaomi.ErrNotSupported
	}
	_, err := d.Action(ctx, d.actWakeUp.siid, d.actWakeUp.aiid, nil)
	return err
}

func (d *speakerDevice) PlayRadio(ctx context.Context) error {
	if d.actPlayRadio.siid == 0 {
		return xiaomi.ErrNotSupported
	}
	_, err := d.Action(ctx, d.actPlayRadio.siid, d.actPlayRadio.aiid, nil)
	return err
}

func (d *speakerDevice) PlayText(ctx context.Context, text string) error {
	if d.actPlayText.siid == 0 {
		return xiaomi.ErrNotSupported
	}
	_, err := d.Action(ctx, d.actPlayText.siid, d.actPlayText.aiid, []interface{}{
		map[string]interface{}{"piid": 1, "value": text},
	})
	return err
}

func (d *speakerDevice) ExecuteTextDirective(ctx context.Context, text string, silent bool) error {
	if d.actExecuteTextDirective.siid == 0 {
		return xiaomi.ErrNotSupported
	}
	_, err := d.Action(ctx, d.actExecuteTextDirective.siid, d.actExecuteTextDirective.aiid, []interface{}{
		map[string]interface{}{"piid": 1, "value": text},
		map[string]interface{}{"piid": 2, "value": silent},
	})
	return err
}

func (d *speakerDevice) PlayMusic(ctx context.Context) error {
	if d.actPlayMusic.siid == 0 {
		return xiaomi.ErrNotSupported
	}
	_, err := d.Action(ctx, d.actPlayMusic.siid, d.actPlayMusic.aiid, nil)
	return err
}

// ── 订阅 / 状态 ──

func (d *speakerDevice) OnPropsChanged(handler func(props SpeakerProps, changed string)) (string, error) {
	type field struct {
		siid, piid int
		name       string
		fill       func(*SpeakerProps, interface{})
	}
	var fields []field
	add := func(sp siidPiid, name string, fill func(*SpeakerProps, interface{})) {
		if sp.valid {
			fields = append(fields, field{sp.siid, sp.piid, name, fill})
		}
	}
	add(d.propOn, "on", func(s *SpeakerProps, v interface{}) { s.On, _ = v.(bool) })
	add(d.propVolume, "volume", func(s *SpeakerProps, v interface{}) { s.Volume = toInt(v) })
	add(d.propMute, "mute", func(s *SpeakerProps, v interface{}) { s.Mute, _ = v.(bool) })
	add(d.propPlayState, "play-state", func(s *SpeakerProps, v interface{}) { s.PlayState = toInt(v) })
	add(d.propSleepMode, "sleep-mode", func(s *SpeakerProps, v interface{}) { s.SleepMode, _ = v.(bool) })
	add(d.propAudioID, "audio-id", func(s *SpeakerProps, v interface{}) {
		if str, ok := v.(string); ok {
			s.AudioID = str
		}
	})

	if len(fields) == 0 {
		return "", xiaomi.ErrNotSupported
	}
	return d.SubProp(0, 0, func(did string, prop *xiaomi.PropertyValue) {
		for _, f := range fields {
			if f.siid == prop.SIID && f.piid == prop.PIID {
				f.fill(&d.propsCache, prop.Value)
				handler(d.propsCache, f.name)
				return
			}
		}
	})
}

func (d *speakerDevice) GetProps() SpeakerProps { return d.propsCache }

func (d *speakerDevice) FetchProps(ctx context.Context) (SpeakerProps, error) {
	keys := []xiaomi.PropKey{}
	add := func(sp siidPiid) {
		if sp.valid {
			keys = append(keys, xiaomi.PropKey{DID: d.info.DID, SIID: sp.siid, PIID: sp.piid})
		}
	}
	add(d.propOn)
	add(d.propVolume)
	add(d.propMute)
	add(d.propPlayState)
	add(d.propSleepMode)
	add(d.propAudioID)

	props, err := d.client.GetProps(ctx, keys)
	if err != nil {
		return d.propsCache, err
	}
	result := SpeakerProps{}
	for _, p := range props {
		switch {
		case match(d.propOn, p):
			result.On, _ = p.Value.(bool)
		case match(d.propVolume, p):
			result.Volume = toInt(p.Value)
		case match(d.propMute, p):
			result.Mute, _ = p.Value.(bool)
		case match(d.propPlayState, p):
			result.PlayState = toInt(p.Value)
		case match(d.propSleepMode, p):
			result.SleepMode, _ = p.Value.(bool)
		case match(d.propAudioID, p):
			if s, ok := p.Value.(string); ok {
				result.AudioID = s
			}
		}
	}
	d.propsCache = result
	return result, nil
}

func match(sp siidPiid, p *xiaomi.PropertyValue) bool {
	return sp.valid && p.SIID == sp.siid && p.PIID == sp.piid
}

// shortName extracts the short name from a SPEC URN.
// E.g., "urn:miot-spec-v2:action:wake-up:..." → "wake-up".
func shortName(urn string) string {
	parts := strings.Split(urn, ":")
	if len(parts) >= 4 {
		return parts[3]
	}
	return urn
}