import { ref, computed } from 'vue'

export default function useTime() {
  // the day is split in 1000 parts, so we start in the morning
  const time = ref(230)

  function updateTime() {
    time.value = (time.value + 0.1) % 1000
  }

  const timeOfDay = computed(() => {
    if (time.value >= 900 || time.value < 80) return 'night'
    if (time.value >= 80 && time.value < 120) return 'morning0'
    if (time.value >= 120 && time.value < 150) return 'morning1'
    if (time.value >= 150 && time.value < 240) return 'morning2'
    if (time.value >= 700 && time.value < 800) return 'evening0'
    if (time.value >= 800 && time.value < 850) return 'evening1'
    if (time.value >= 850 && time.value < 900) return 'evening2'
    return 'day'
  })

  const clock = computed(() => {
    const t = time.value * 86.4 // 1000 ticks to 86400 seconds (per day)
    const h = ~~(t / 3600.0)
    const m = ~~((t / 3600.0 - h) * 60.0)
    return `${(h + 2) % 24}:${m < 10 ? '0' : ''}${m}`
  })

  return { time, updateTime, timeOfDay, clock }
}