package service

import (
	"context"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"strings"
	"testing"

	"fashionapi/internal/pkg/storage"
)

// TestFetchImagesCleansUpOnFailure 验证「单图失败=整任务失败」时，本批已成功上传的对象被回滚删除，
// 不会在存储里留下孤儿文件。
func TestFetchImagesCleansUpOnFailure(t *testing.T) {
	dir := t.TempDir()
	local := storage.NewLocalUploader(dir, "/uploads")
	s := &IngestService{uploader: local, local: local, httpClient: &http.Client{}}

	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if strings.Contains(r.URL.Path, "bad") {
			w.WriteHeader(500)
			return
		}
		w.Header().Set("Content-Type", "image/jpeg")
		_, _ = w.Write([]byte("fakeimagebytes"))
	}))
	defer srv.Close()

	urls := []string{srv.URL + "/ok1.jpg", srv.URL + "/ok2.jpg", srv.URL + "/bad.jpg"}
	_, out, keys, failed := s.fetchImages(context.Background(), urls, "runway")
	if !failed {
		t.Fatalf("expected failed=true when one image errors")
	}
	if len(out) != 2 || len(keys) != 2 {
		t.Fatalf("expected 2 successful uploads, got out=%d keys=%d", len(out), len(keys))
	}
	for _, k := range keys {
		if _, err := os.Stat(filepath.Join(dir, filepath.FromSlash(k))); err != nil {
			t.Fatalf("uploaded file missing before cleanup: %s", k)
		}
	}

	s.cleanupUploads(context.Background(), keys)

	for _, k := range keys {
		if _, err := os.Stat(filepath.Join(dir, filepath.FromSlash(k))); !os.IsNotExist(err) {
			t.Fatalf("orphan file not cleaned up: %s", k)
		}
	}
}