package store

import (
	"sync"
	"sync/atomic"
	"testing"
	"time"
)

func TestANoticeIsClaimedByOneOfThoseAskingAtOnce(t *testing.T) {
	db := capacityStore(t)
	at := time.Date(2026, 10, 10, 9, 0, 0, 0, time.UTC)
	var yes atomic.Int64
	var wg sync.WaitGroup
	for range 8 {
		wg.Go(func() {
			ok, err := db.ClaimNotice(t.Context(), "budget_spent\x00team:t1", at, time.Hour)
			if err != nil {
				t.Error(err)
			}
			if ok {
				yes.Add(1)
			}
		})
	}
	wg.Wait()
	if yes.Load() != 1 {
		t.Fatalf("%d of eight claimed the same notice", yes.Load())
	}
	if ok, _ := db.ClaimNotice(t.Context(), "budget_spent\x00team:t1", at.Add(59*time.Minute), time.Hour); ok {
		t.Error("claimed again within the hour")
	}
	if ok, _ := db.ClaimNotice(t.Context(), "budget_spent\x00team:t2", at, time.Hour); !ok {
		t.Error("another subject could not be claimed")
	}
	if ok, _ := db.ClaimNotice(t.Context(), "budget_spent\x00team:t1", at.Add(61*time.Minute), time.Hour); !ok {
		t.Error("not claimable once the hour had passed")
	}
}