package admin

import (
	"context"
	"strings"
	"testing"

	"telesrv/internal/domain"
)

type fakeGifCatalogService struct {
	entries     []domain.GifCatalogEntry
	listCalls   int
	uploadCalls int
	createCalls int
}

func (s *fakeGifCatalogService) ValidateGifUpload(_ string, data []byte) (string, bool) {
	return "image/gif", strings.HasPrefix(string(data), "GIF89a")
}
func (s *fakeGifCatalogService) AdminUploadGifMaterial(context.Context, string, []byte) (domain.Document, error) {
	s.uploadCalls++
	return domain.Document{ID: 91}, nil
}
func (s *fakeGifCatalogService) AdminCreateGifCatalogEntry(context.Context, string, int64) (domain.GifCatalogEntry, error) {
	s.createCalls++
	entry := domain.GifCatalogEntry{ID: 92, DocumentID: 91, Title: "Wave", Enabled: true}
	s.entries = append(s.entries, entry)
	return entry, nil
}
func (s *fakeGifCatalogService) AdminListGifCatalog(context.Context) ([]domain.GifCatalogEntry, error) {
	s.listCalls++
	return append([]domain.GifCatalogEntry(nil), s.entries...), nil
}
func (*fakeGifCatalogService) AdminSetGifCatalogEnabled(context.Context, int64, bool) (bool, error) {
	return true, nil
}
func (*fakeGifCatalogService) AdminSetGifCatalogSortOrder(context.Context, int64, int) (bool, error) {
	return true, nil
}
func (*fakeGifCatalogService) AdminSetGifCatalogCategory(context.Context, int64, string) (bool, error) {
	return true, nil
}
func (*fakeGifCatalogService) AdminAutoCategorizeGifCatalog(context.Context) (int, error) {
	return 0, nil
}
func (*fakeGifCatalogService) AdminDeleteUncategorizedGifs(context.Context) (int, int, error) {
	return 0, 0, nil
}
func (*fakeGifCatalogService) AdminDeleteGifCatalogEntry(context.Context, int64) (bool, error) {
	return true, nil
}
func (*fakeGifCatalogService) GetFile(context.Context, domain.FileDownloadRequest) (domain.FileChunk, bool, error) {
	return domain.FileChunk{}, false, nil
}

func TestCreateGifCatalogEntryReplayAndContentFingerprint(t *testing.T) {
	ctx := context.Background()
	repo := newMemoryCommandRepo()
	gifs := &fakeGifCatalogService{}
	svc := NewService(Dependencies{Commands: repo, GifCatalog: gifs, Now: fixedNow})
	req := CreateGifCatalogEntryRequest{
		CommandMeta: CommandMeta{CommandID: "gif-create-1", Actor: "ops", Reason: "catalog"},
		Title:       "Wave",
		FileName:    "wave.gif",
		Data:        []byte("GIF89a-one"),
	}
	first, err := svc.CreateGifCatalogEntry(ctx, req)
	if err != nil || first.Status != string(domain.AdminCommandCompleted) {
		t.Fatalf("first create = %+v err=%v", first, err)
	}
	if gifs.listCalls != 1 || gifs.uploadCalls != 1 || gifs.createCalls != 1 {
		t.Fatalf("first calls list/upload/create=%d/%d/%d", gifs.listCalls, gifs.uploadCalls, gifs.createCalls)
	}

	// Even when the catalog has become full, the same completed command must be
	// replayed before capacity preflight and must not upload another blob.
	gifs.entries = make([]domain.GifCatalogEntry, domain.MaxGifCatalogEntries)
	replay, err := svc.CreateGifCatalogEntry(ctx, req)
	if err != nil || !replay.AlreadyExecuted {
		t.Fatalf("replay = %+v err=%v", replay, err)
	}
	if gifs.listCalls != 1 || gifs.uploadCalls != 1 || gifs.createCalls != 1 {
		t.Fatalf("replay calls list/upload/create=%d/%d/%d", gifs.listCalls, gifs.uploadCalls, gifs.createCalls)
	}

	conflict := req
	conflict.Data = []byte("GIF89a-two")
	if _, err := svc.CreateGifCatalogEntry(ctx, conflict); err == nil || err.Error() != "COMMAND_ID_CONFLICT" {
		t.Fatalf("different content with same command id err=%v", err)
	}
	if gifs.listCalls != 1 || gifs.uploadCalls != 1 || gifs.createCalls != 1 {
		t.Fatalf("conflict mutated list/upload/create=%d/%d/%d", gifs.listCalls, gifs.uploadCalls, gifs.createCalls)
	}
}