package store_test

import (
	"context"
	"testing"
	"time"

	"github.com/wotra/wotra/internal/domain"
	"github.com/wotra/wotra/internal/store"
)

func TestClosedWeekStoreSumDelta(t *testing.T) {
	db, err := store.Open(":memory:")
	if err != nil {
		t.Fatal(err)
	}
	defer db.Close()

	s := store.NewClosedWeekStore(db)
	ctx := context.Background()
	now := time.Now().UnixMilli()

	// Empty table → 0, 0
	total, count, err := s.SumDelta(ctx)
	if err != nil {
		t.Fatalf("SumDelta on empty table: %v", err)
	}
	if total != 0 || count != 0 {
		t.Fatalf("empty: want (0,0), got (%d,%d)", total, count)
	}

	// Insert two weeks with known deltas.
	for _, w := range []*domain.ClosedWeek{
		{WeekKey: "2024-W01", ExpectedMs: 144_000_000, WorkedMs: 147_600_000, DeltaMs: 3_600_000, ClosedAt: now, UpdatedAt: now},
		{WeekKey: "2024-W02", ExpectedMs: 144_000_000, WorkedMs: 142_200_000, DeltaMs: -1_800_000, ClosedAt: now, UpdatedAt: now},
	} {
		if err := s.Upsert(ctx, w); err != nil {
			t.Fatal(err)
		}
	}

	total, count, err = s.SumDelta(ctx)
	if err != nil {
		t.Fatalf("SumDelta: %v", err)
	}
	if count != 2 {
		t.Errorf("count: want 2, got %d", count)
	}
	want := int64(3_600_000 - 1_800_000) // 1_800_000
	if total != want {
		t.Errorf("total: want %d, got %d", want, total)
	}
}