package service

import (
	"testing"
	"time"
)

func TestIsInSleepWindow(t *testing.T) {
	t.Parallel()

	// wake=07:30, sleep=23:30 => sleep: [23:30, 07:30)
	wake := 7*60 + 30
	sleep := 23*60 + 30

	if !isInSleepWindow(0, wake, sleep) {
		t.Fatalf("expected 00:00 to be in sleep window")
	}
	if isInSleepWindow(8*60, wake, sleep) {
		t.Fatalf("expected 08:00 to be awake")
	}
	if !isInSleepWindow(23*60+45, wake, sleep) {
		t.Fatalf("expected 23:45 to be in sleep window")
	}

	// wake=18:00, sleep=02:00 => sleep: [02:00, 18:00)
	wake = 18 * 60
	sleep = 2 * 60
	if isInSleepWindow(1*60, wake, sleep) {
		t.Fatalf("expected 01:00 to be awake (awake window crosses midnight)")
	}
	if !isInSleepWindow(10*60, wake, sleep) {
		t.Fatalf("expected 10:00 to be in sleep window")
	}
}

func TestAdjustToWakeIfInSleep(t *testing.T) {
	t.Parallel()

	loc := time.Local
	// wake=07:30, sleep=23:30
	wake := "07:30"
	sleep := "23:30"

	// 02:00 should adjust to same-day 07:30
	in := time.Date(2026, 1, 2, 2, 0, 0, 0, loc)
	out, adjusted, err := adjustToWakeIfInSleep(in, wake, sleep)
	if err != nil {
		t.Fatalf("adjustToWakeIfInSleep: %v", err)
	}
	if !adjusted {
		t.Fatalf("expected adjustment")
	}
	if out.Hour() != 7 || out.Minute() != 30 {
		t.Fatalf("expected 07:30, got %02d:%02d", out.Hour(), out.Minute())
	}

	// 10:00 should not adjust
	in = time.Date(2026, 1, 2, 10, 0, 0, 0, loc)
	out, adjusted, err = adjustToWakeIfInSleep(in, wake, sleep)
	if err != nil {
		t.Fatalf("adjustToWakeIfInSleep: %v", err)
	}
	if adjusted {
		t.Fatalf("expected no adjustment")
	}
	if !out.Equal(in) {
		t.Fatalf("expected unchanged time")
	}

	// 23:45 should adjust to next-day 07:30
	in = time.Date(2026, 1, 2, 23, 45, 0, 0, loc)
	out, adjusted, err = adjustToWakeIfInSleep(in, wake, sleep)
	if err != nil {
		t.Fatalf("adjustToWakeIfInSleep: %v", err)
	}
	if !adjusted {
		t.Fatalf("expected adjustment")
	}
	if out.Day() != 3 || out.Hour() != 7 || out.Minute() != 30 {
		t.Fatalf("expected next day 07:30, got %s", out.Format(time.RFC3339))
	}
}