package effects

import (
	"fmt"
	"git.aiterp.net/lucifer3/server/device"
	"time"
)

type Gradient struct {
	States      []device.State `json:"states,omitempty"`
	AnimationMS int64          `json:"AnimationMs,omitempty"`
	Reverse     bool           `json:"backward,omitempty"`
	Interpolate bool           `json:"interpolate,omitempty"`
}

func (e Gradient) State(index, length, round int) device.State {
	if len(e.States) == 0 {
		return device.State{}
	}

	if e.Reverse {
		round = -round
	}
	walkedIndex := ((length + index) - round) % length

	return gradientState(e.States, e.Interpolate, walkedIndex, length)
}

func (e Gradient) Frequency() time.Duration {
	return time.Duration(e.AnimationMS) * time.Millisecond
}

func (e Gradient) EffectDescription() string {
	return fmt.Sprintf("Gradient(states:%s, anim:%dms, int:%t)", statesDescription(e.States), e.AnimationMS, e.Interpolate)
}