package httpapi

import (
	"bytes"
	"encoding/json"
	"io"
	"mime/multipart"
	"net/http"
	"net/http/httptest"
	"net/url"
	"os"
	"path/filepath"
	"testing"
	"time"

	"scout/internal/registry"
)

func TestUploadListLatestAndDownload(t *testing.T) {
	store, err := registry.New(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	server := httptest.NewServer((&Server{Registry: store, DeveloperToken: "测试令牌"}).Handler())
	defer server.Close()

	unauthorized, err := http.Post(server.URL+"/api/v1/packages/upload", "application/json", nil)
	if err != nil {
		t.Fatal(err)
	}
	if unauthorized.StatusCode != http.StatusUnauthorized {
		t.Fatalf("未授权状态错误: %d", unauthorized.StatusCode)
	}
	unauthorized.Body.Close()

	body := &bytes.Buffer{}
	writer := multipart.NewWriter(body)
	_ = writer.WriteField("name", "demo-core")
	_ = writer.WriteField("version", "1.0.0")
	_ = writer.WriteField("platform", "any")
	_ = writer.WriteField("architecture", "universal")
	fileWriter, err := writer.CreateFormFile("file", "demo.pkg")
	if err != nil {
		t.Fatal(err)
	}
	_, _ = fileWriter.Write([]byte("demo package"))
	_ = writer.Close()
	request, err := http.NewRequest(http.MethodPost, server.URL+"/api/v1/packages/upload", body)
	if err != nil {
		t.Fatal(err)
	}
	request.Header.Set("Content-Type", writer.FormDataContentType())
	request.Header.Set("Authorization", "Bearer 测试令牌")
	response, err := http.DefaultClient.Do(request)
	if err != nil {
		t.Fatal(err)
	}
	if response.StatusCode != http.StatusCreated {
		t.Fatalf("上传状态错误: %d", response.StatusCode)
	}
	var uploaded registry.Package
	if err := json.NewDecoder(response.Body).Decode(&uploaded); err != nil {
		t.Fatal(err)
	}
	response.Body.Close()
	if uploaded.Name != "demo-core" || uploaded.Version != "1.0.0" {
		t.Fatalf("上传结果错误: %+v", uploaded)
	}

	listResponse, err := http.Get(server.URL + "/api/v1/packages")
	if err != nil {
		t.Fatal(err)
	}
	var listed struct {
		Packages []registry.Package `json:"packages"`
	}
	if err := json.NewDecoder(listResponse.Body).Decode(&listed); err != nil {
		t.Fatal(err)
	}
	listResponse.Body.Close()
	if len(listed.Packages) != 1 {
		t.Fatalf("包列表数量错误: %d", len(listed.Packages))
	}

	downloadResponse, err := http.Get(server.URL + "/api/v1/packages/demo-core/1.0.0/download")
	if err != nil {
		t.Fatal(err)
	}
	content, err := io.ReadAll(downloadResponse.Body)
	if err != nil {
		t.Fatal(err)
	}
	downloadResponse.Body.Close()
	if downloadResponse.StatusCode != http.StatusOK || string(content) != "demo package" {
		t.Fatalf("下载结果错误: %d %q", downloadResponse.StatusCode, content)
	}
	if downloadResponse.Header.Get("X-Scout-SHA256") != uploaded.SHA256 {
		t.Fatal("下载校验值不一致")
	}
}

func TestDownloadUsesFallbackFileNameForLegacyPackage(t *testing.T) {
	root := t.TempDir()
	versionDir := filepath.Join(root, "legacy-demo", "1.0.0")
	if err := os.MkdirAll(versionDir, 0o755); err != nil {
		t.Fatal(err)
	}
	legacy := registry.Package{
		Name:       "legacy-demo",
		Version:    "1.0.0",
		Status:     "published",
		Size:       6,
		UploadedAt: time.Now().UTC(),
	}
	metadata, err := json.Marshal(legacy)
	if err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(versionDir, "metadata.json"), metadata, 0o644); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(versionDir, "package.bin"), []byte("legacy"), 0o644); err != nil {
		t.Fatal(err)
	}
	store, err := registry.New(root)
	if err != nil {
		t.Fatal(err)
	}
	server := httptest.NewServer((&Server{Registry: store}).Handler())
	defer server.Close()

	response, err := http.Get(server.URL + "/api/v1/packages/legacy-demo/1.0.0/download")
	if err != nil {
		t.Fatal(err)
	}
	defer response.Body.Close()
	if response.StatusCode != http.StatusOK {
		t.Fatalf("历史包下载状态错误: %d", response.StatusCode)
	}
	if got := response.Header.Get("Content-Disposition"); got != `attachment; filename="legacy-demo-1.0.0.pkg"` {
		t.Fatalf("历史包下载文件名错误: %s", got)
	}
}

func TestStreamFiltersPackage(t *testing.T) {
	store, err := registry.New(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	server := httptest.NewServer((&Server{Registry: store, DeveloperToken: "测试令牌"}).Handler())
	defer server.Close()

	request, err := http.NewRequest(http.MethodGet, server.URL+"/api/v1/updates/stream?packages=target", nil)
	if err != nil {
		t.Fatal(err)
	}
	client := &http.Client{}
	streamResponse, err := client.Do(request)
	if err != nil {
		t.Fatal(err)
	}
	defer streamResponse.Body.Close()
	if streamResponse.StatusCode != http.StatusOK {
		t.Fatalf("通知状态错误: %d", streamResponse.StatusCode)
	}
	if streamResponse.Header.Get("Content-Type") != "text/event-stream; charset=utf-8" {
		t.Fatalf("通知类型错误: %s", streamResponse.Header.Get("Content-Type"))
	}

	_ = url.Values{}
}