package service

import (
	"testing"
	"time"
)

func TestRechargeRewardCurrentPeriodStartsOnMay21ThenCalendarMonth(t *testing.T) {
	location, err := time.LoadLocation("Asia/Riyadh")
	if err != nil {
		t.Fatalf("load location: %v", err)
	}
	startAt := rechargeRewardStartAt("2026-05-21", location)

	beforeStart := time.Date(2026, 5, 20, 23, 59, 59, 0, location)
	if _, ok := rechargeRewardCurrentPeriod(beforeStart, startAt, location); ok {
		t.Fatalf("period before start should be inactive")
	}

	firstNow := time.Date(2026, 5, 21, 0, 0, 0, 0, location)
	first, ok := rechargeRewardCurrentPeriod(firstNow, startAt, location)
	if !ok {
		t.Fatalf("first period should be active")
	}
	if first.CycleKey != "20260521" || first.RechargeDate != 202605 {
		t.Fatalf("first period key/date = %s/%d", first.CycleKey, first.RechargeDate)
	}
	if !first.StartAt.Equal(startAt) {
		t.Fatalf("first start = %s, want %s", first.StartAt, startAt)
	}
	if want := time.Date(2026, 6, 1, 0, 0, 0, 0, location); !first.EndAt.Equal(want) {
		t.Fatalf("first end = %s, want %s", first.EndAt, want)
	}

	secondNow := time.Date(2026, 6, 1, 0, 0, 0, 0, location)
	second, ok := rechargeRewardCurrentPeriod(secondNow, startAt, location)
	if !ok {
		t.Fatalf("second period should be active")
	}
	if second.CycleKey != "20260601" || second.RechargeDate != 202606 {
		t.Fatalf("second period key/date = %s/%d", second.CycleKey, second.RechargeDate)
	}
	if want := time.Date(2026, 6, 1, 0, 0, 0, 0, location); !second.StartAt.Equal(want) {
		t.Fatalf("second start = %s, want %s", second.StartAt, want)
	}
}

func TestRechargeRewardGoldEventIDUsesCycleAndLevel(t *testing.T) {
	got := rechargeRewardGoldEventID("likei", "20260601", 42, 3)
	want := "recharge-reward:LIKEI:20260601:42:3"
	if got != want {
		t.Fatalf("event id = %q, want %q", got, want)
	}
}