package app

import (
	"context"
	"errors"
	"testing"
	"time"

	sharedcache "github.com/geo-platform/tenant-api/internal/shared/cache"
)

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

	ctx := context.Background()
	c := sharedcache.New("memory", nil, sharedcache.WithNamespace("test"))
	tenantID := int64(42)
	articleID := int64(7)
	params := ArticleListParams{Page: 1, PageSize: 10}

	oldVersion := articleCacheVersion(ctx, c, tenantID)
	oldListKey := articleListCacheKey(tenantID, oldVersion, params)
	oldDetailKey := articleDetailCacheKey(tenantID, articleID, oldVersion)
	if err := c.Set(ctx, oldListKey, []byte("generating-list"), time.Minute); err != nil {
		t.Fatalf("set old list cache: %v", err)
	}
	if err := c.Set(ctx, oldDetailKey, []byte("generating-detail"), time.Minute); err != nil {
		t.Fatalf("set old detail cache: %v", err)
	}

	invalidateArticleCaches(ctx, c, tenantID, &articleID)
	newVersion := articleCacheVersion(ctx, c, tenantID)
	if newVersion == oldVersion {
		t.Fatalf("expected article cache version to change, stayed %q", newVersion)
	}

	if err := c.Set(ctx, oldListKey, []byte("late-generating-list"), time.Minute); err != nil {
		t.Fatalf("late set old list cache: %v", err)
	}
	if err := c.Set(ctx, oldDetailKey, []byte("late-generating-detail"), time.Minute); err != nil {
		t.Fatalf("late set old detail cache: %v", err)
	}

	if _, err := c.Get(ctx, articleListCacheKey(tenantID, newVersion, params)); !errors.Is(err, sharedcache.ErrNotFound) {
		t.Fatalf("expected new list key to miss stale late write, got err %v", err)
	}
	if _, err := c.Get(ctx, articleDetailCacheKey(tenantID, articleID, newVersion)); !errors.Is(err, sharedcache.ErrNotFound) {
		t.Fatalf("expected new detail key to miss stale late write, got err %v", err)
	}
}