package lifx

import (
	"git.aiterp.net/lucifer/new-server/models"
	"math"
	"time"
)

type State struct {
	target     string
	externalId int
	lightState *LightState
	firmware   *StateHostFirmware
	version    *StateVersion

	deviceState    *models.DeviceState
	discoveredTime time.Time
	lightStateTime time.Time
	requestTime    time.Time
	updateTime     time.Time
	fwSpamTime     time.Time
	acksPending    []uint8
}

func (s *State) generateUpdate() []Payload {
	if s.deviceState == nil || s.lightState == nil {
		return nil
	}

	results := make([]Payload, 0, 0)
	if s.deviceState.Power != s.lightState.On {
		results = append(results, &SetLightPower{On: s.deviceState.Power, TransitionTime: time.Millisecond * 100})
	}

	if !s.deviceState.Power {
		return results
	}

	c := s.deviceState.Color
	l := s.lightState
	di := s.deviceState.Intensity
	k := c.Kelvin
	if k == 0 {
		k = 4000
	}
	if !equalish(c.Hue, l.Hue) || !equalish(c.Saturation, l.Sat) || !equalish(di, l.Bri) || k != l.Kelvin {
		results = append(results, &SetColor{
			Hue:            c.Hue,
			Sat:            c.Saturation,
			Bri:            di,
			Kelvin:         k,
			TransitionTime: time.Millisecond * 150,
		})
	}

	return results
}

func (s *State) handleAck(seq uint8) {
	for i, pendingAck := range s.acksPending {
		if pendingAck == seq {
			s.acksPending = append(s.acksPending[:i], s.acksPending[i+1:]...)
			break
		}
	}

	if len(s.acksPending) == 0 {
		s.lightStateTime = time.Now()

		prevLabel := ""
		if s.lightState != nil {
			prevLabel = s.lightState.Label
		}

		s.lightState = &LightState{
			Hue:    s.deviceState.Color.Hue,
			Sat:    s.deviceState.Color.Saturation,
			Bri:    s.deviceState.Intensity,
			Kelvin: s.deviceState.Color.Kelvin,
			On:     s.deviceState.Power,
			Label:  prevLabel,
		}
	}
}

func equalish(a, b float64) bool {
	return math.Abs(a-b) < 0.005
}