package controllers

import (
	"testing"
	"time"
)

func discard(h *Hysteresis) {
	for {
		<-h.C
	}
}

func TestHysteresisNormalCooling(t *testing.T) {
	c := &Config{
		FermentationTemperature: 20,
		MaxWortDelta:            0.5,
		MinChamberTemperature:   2,
		MinCoolerRuntimeSecs:    300,
		MaxCoolerRuntimeSecs:    86400,
		MinCoolerCooldownSecs:   300,
	}

	h := NewHysteresis("test")
	h.config = c
	h.ambientTemperature = 25
	h.chamberTemperature = 22
	h.wortTemperature = 20
	go discard(h)
	h.update()

	assert := func(expectedState bool) {
		actualState := h.GetCoolerState()
		if actualState != expectedState {
			t.Errorf("Expected cooler state %v, but got %v", expectedState, actualState)
		}
	}

	assert(false)

	h.lastCoolerStateChange = h.lastCoolerStateChange.Add(-1 * time.Hour)
	h.UpdateWortTemperature(20.5)
	assert(false)

	h.lastCoolerStateChange = h.lastCoolerStateChange.Add(-1 * time.Hour)
	h.UpdateWortTemperature(20.6)
	assert(true)

	h.lastCoolerStateChange = h.lastCoolerStateChange.Add(-1 * time.Hour)
	h.UpdateWortTemperature(20)
	assert(false)
}