package domain

import (
	"testing"
	"time"
)

func TestNormalizeSweepHours(t *testing.T) {
	got, err := NormalizeSweepHours(nil)
	if err != nil {
		t.Fatal(err)
	}
	if len(got) != 1 || got[0] != 6 {
		t.Fatalf("empty → default [6], got %v", got)
	}
	got, err = NormalizeSweepHours([]int{18, 6, 6, 12})
	if err != nil {
		t.Fatal(err)
	}
	if len(got) != 3 || got[0] != 6 || got[1] != 12 || got[2] != 18 {
		t.Fatalf("dedupe+sort, got %v", got)
	}
	if _, err := NormalizeSweepHours([]int{24}); err == nil {
		t.Fatal("hour 24 should fail")
	}
	if _, err := NormalizeSweepHours([]int{0, 3, 6, 9, 12, 15, 18}); err == nil {
		t.Fatal("too many hours should fail")
	}
}

func TestDueSweepSlots_TaipeiHours(t *testing.T) {
	loc := TaipeiLocation()
	// 05:59 Taipei 31 Jul → no 06:00 slot yet
	before := time.Date(2026, 7, 31, 5, 59, 0, 0, loc)
	if slots := DueSweepSlots(before, []int{6, 18}); len(slots) != 0 {
		t.Fatalf("before 06:00 want 0, got %+v", slots)
	}
	at := time.Date(2026, 7, 31, 6, 0, 0, 0, loc)
	slots := DueSweepSlots(at, []int{6, 18})
	if len(slots) != 1 || slots[0].Hour != 6 {
		t.Fatalf("at 06:00 want [6], got %+v", slots)
	}
	evening := time.Date(2026, 7, 31, 18, 5, 0, 0, loc)
	slots = DueSweepSlots(evening, []int{6, 18})
	if len(slots) != 2 || slots[0].Hour != 6 || slots[1].Hour != 18 {
		t.Fatalf("after 18:00 want [6,18], got %+v", slots)
	}
}