package utils

import (
	"context"
	"fmt"
	"time"
)

// true if current hour is between a and b
// clock is 24 hours
// overflow is ok, e.g. CurrentHourCheck(22,8) will return true at night
// always refers to local time
func CurrentHourCheck(a, b int) bool {
	t, err := LocalTime(context.Background())
	if err != nil {
		fmt.Printf("failed to get localtime: %s\n", ErrorString(err))
		return false
	}
	return currentHourCheckWithTime(a, b, t)
}

func currentHourCheckWithTime(a, b int, t time.Time) bool {
	h, _, _ := t.Clock()
	if a == b {
		// e.g. CurrentHourCheck(22,22) -> returns true only at 22 hours
		return h == a
	}

	if a > b {
		// e.g. CurrentHourCheck(22,8) -> returns true between 22 and 8 hours (as in: during the night)
		if h >= a {
			return true
		}
		if h < b {
			return true
		}
		return false
	}

	// e.g. CurrentHourCheck(8,22) -> returns true between 8 and 22 hours (as in: during the day)
	if h <= a {
		return false
	}
	if h > b {
		return false
	}
	return true
}