import { BiscuitSwitchState } from 'src/components/BiscuitSwitch.vue';
import {
  useBiscuitMachine,
  OPTIMAL_COOKIES_TARGET_TEMPERATURE,
  BELT_SIZE,
  STAMPER_POSITION,
  EXTRUDER_POSITION,
} from 'src/composables/biscuitMachine';
import { expect, test } from 'vitest';
import { nextTick, ref } from 'vue';
import { toggleTickAsync } from '../utils';

test('start in the expected state', async () => {
  const mainSwitchPosition = ref<BiscuitSwitchState>('off');
  const inTargetZoneIn = ref(false);
  const motorPulseIn = ref(false);

  const {
    motorOn,
    stamperPulseOut,
    extruderPulseOut,
    targetTemperature,
    machineState,
  } = useBiscuitMachine(mainSwitchPosition, inTargetZoneIn, motorPulseIn);

  expect(machineState.value).toBe('off');
  expect(stamperPulseOut.value).toBe(false);
  expect(extruderPulseOut.value).toBe(false);
  expect(targetTemperature.value).toBe('none');
  expect(motorOn.value).toBe(false);
});

test('switches motor on only after target temperature reached', async () => {
  const mainSwitchPosition = ref<BiscuitSwitchState>('on');
  const inTargetZoneIn = ref(false);
  const motorPulseIn = ref(false);

  const { motorOn, targetTemperature, machineState } = useBiscuitMachine(
    mainSwitchPosition,
    inTargetZoneIn,
    motorPulseIn
  );

  expect(machineState.value).toBe('heating');
  expect(motorOn.value).toBe(false);
  expect(targetTemperature.value).toBe(OPTIMAL_COOKIES_TARGET_TEMPERATURE);

  inTargetZoneIn.value = true;
  await nextTick();

  expect(machineState.value).toBe('on');
  expect(motorOn.value).toBe(true);
  expect(targetTemperature.value).toBe(OPTIMAL_COOKIES_TARGET_TEMPERATURE);
});

test('pausing the machine stops the motor & keeps the temperature', async () => {
  const mainSwitchPosition = ref<BiscuitSwitchState>('on');
  const inTargetZoneIn = ref(true);
  const motorPulseIn = ref(false);

  const { motorOn, targetTemperature, machineState } = useBiscuitMachine(
    mainSwitchPosition,
    inTargetZoneIn,
    motorPulseIn
  );

  expect(machineState.value).toBe('on');
  expect(motorOn.value).toBe(true);
  expect(targetTemperature.value).toBe(OPTIMAL_COOKIES_TARGET_TEMPERATURE);

  mainSwitchPosition.value = 'paused';
  await nextTick();

  expect(machineState.value).toBe('paused');
  expect(motorOn.value).toBe(false);
  expect(targetTemperature.value).toBe(OPTIMAL_COOKIES_TARGET_TEMPERATURE);
});

test('turning off the machine waits for produce to get carted off', async () => {
  const mainSwitchPosition = ref<BiscuitSwitchState>('on');
  const inTargetZoneIn = ref(true);
  const motorPulseIn = ref(false);

  const {
    motorOn,
    targetTemperature,
    machineState,
    extruderPulseOut,
    stamperPulseOut,
  } = useBiscuitMachine(mainSwitchPosition, inTargetZoneIn, motorPulseIn);

  expect(machineState.value).toBe('on');
  expect(motorOn.value).toBe(true);
  expect(targetTemperature.value).toBe(OPTIMAL_COOKIES_TARGET_TEMPERATURE);

  mainSwitchPosition.value = 'off';
  await nextTick();

  expect(machineState.value).toBe('turning off');
  expect(motorOn.value).toBe(true);
  expect(targetTemperature.value).toBe(OPTIMAL_COOKIES_TARGET_TEMPERATURE);

  for (let i = 0; i < BELT_SIZE - 1; i++) {
    motorPulseIn.value = true;
    await nextTick();

    expect(machineState.value).toBe('turning off');
    expect(motorOn.value).toBe(true);
    expect(targetTemperature.value).toBe(OPTIMAL_COOKIES_TARGET_TEMPERATURE);
    expect(extruderPulseOut.value).toBe(false);
    expect(stamperPulseOut.value).toBe(
      i < STAMPER_POSITION - EXTRUDER_POSITION
      // i <= 3
    );

    motorPulseIn.value = false;
    await nextTick();
  }

  await toggleTickAsync(motorPulseIn);
  expect(machineState.value).toBe('off');
  expect(motorOn.value).toBe(false);
  expect(targetTemperature.value).toBe('none');
});