package httpapi

import (
	"bytes"
	"context"
	"encoding/json"
	"mime/multipart"
	"net/http"
	"net/http/httptest"
	"path/filepath"
	"sync"
	"testing"
	"time"

	"scout/internal/notify"
	"scout/internal/registry"
	"scout/internal/users"
)

type testMailer struct {
	mu       sync.Mutex
	messages []notify.Message
}

func (mailer *testMailer) Send(_ context.Context, message notify.Message) error {
	mailer.mu.Lock()
	defer mailer.mu.Unlock()
	mailer.messages = append(mailer.messages, message)
	return nil
}

func (mailer *testMailer) count() int {
	mailer.mu.Lock()
	defer mailer.mu.Unlock()
	return len(mailer.messages)
}

func TestAuthenticationRolesAndNotifications(t *testing.T) {
	store, err := registry.New(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	userStore, err := users.New(filepath.Join(t.TempDir(), "users.json"))
	if err != nil {
		t.Fatal(err)
	}
	admin, err := userStore.EnsureAdmin("admin@example.com", "管理员", "admin-pass-123")
	if err != nil {
		t.Fatal(err)
	}
	mailer := &testMailer{}
	server := httptest.NewServer((&Server{Registry: store, Users: userStore, Mailer: mailer}).Handler())
	defer server.Close()

	registerResponse := postJSONRequest(t, server.URL+"/api/v1/auth/register", map[string]string{"email": "dev@example.com", "name": "开发者", "password": "developer-pass-123"}, "")
	if registerResponse.StatusCode != http.StatusCreated {
		t.Fatalf("注册状态错误: %d", registerResponse.StatusCode)
	}
	registerResponse.Body.Close()
	developer, ok := userStore.FindByEmail("dev@example.com")
	if !ok {
		t.Fatal("开发者用户不存在")
	}
	if _, err := userStore.Update(developer.ID, users.RoleDeveloper, true); err != nil {
		t.Fatal(err)
	}

	loginResponse := postJSONRequest(t, server.URL+"/api/v1/auth/login", map[string]string{"email": "dev@example.com", "password": "developer-pass-123"}, "")
	if loginResponse.StatusCode != http.StatusOK {
		t.Fatalf("登录状态错误: %d", loginResponse.StatusCode)
	}
	var login userResponse
	if err := json.NewDecoder(loginResponse.Body).Decode(&login); err != nil {
		t.Fatal(err)
	}
	loginResponse.Body.Close()
	if login.Session == "" || login.User.Role != users.RoleDeveloper {
		t.Fatalf("登录结果错误: %+v", login)
	}

	ordinary, err := userStore.Register("user@example.com", "普通用户", "ordinary-pass-123")
	if err != nil {
		t.Fatal(err)
	}
	ordinarySession, _, err := userStore.CreateSession(ordinary.ID, time.Hour)
	if err != nil {
		t.Fatal(err)
	}
	ordinaryUpload := postMultipartRequest(t, server.URL+"/api/v1/packages/upload", ordinarySession, "auth-demo", "1.0.0", "demo.pkg", "content")
	if ordinaryUpload.StatusCode != http.StatusForbidden {
		t.Fatalf("普通用户上传状态错误: %d", ordinaryUpload.StatusCode)
	}
	ordinaryUpload.Body.Close()

	developerUpload := postMultipartRequest(t, server.URL+"/api/v1/packages/upload", login.Session, "auth-demo", "1.0.0", "demo.pkg", "content")
	if developerUpload.StatusCode != http.StatusCreated {
		t.Fatalf("开发者上传状态错误: %d", developerUpload.StatusCode)
	}
	developerUpload.Body.Close()
	if mailer.count() < 3 {
		t.Fatalf("邮件通知数量不足: %d", mailer.count())
	}

	adminSession, _, err := userStore.CreateSession(admin.ID, time.Hour)
	if err != nil {
		t.Fatal(err)
	}
	adminResponse := getRequest(t, server.URL+"/api/v1/admin/users", adminSession)
	if adminResponse.StatusCode != http.StatusOK {
		t.Fatalf("管理员查询用户状态错误: %d", adminResponse.StatusCode)
	}
	adminResponse.Body.Close()
}

func postJSONRequest(t *testing.T, target string, value any, token string) *http.Response {
	t.Helper()
	body, err := json.Marshal(value)
	if err != nil {
		t.Fatal(err)
	}
	request, err := http.NewRequest(http.MethodPost, target, bytes.NewReader(body))
	if err != nil {
		t.Fatal(err)
	}
	request.Header.Set("Content-Type", "application/json")
	if token != "" {
		request.Header.Set("Authorization", "Bearer "+token)
	}
	response, err := http.DefaultClient.Do(request)
	if err != nil {
		t.Fatal(err)
	}
	return response
}

func postMultipartRequest(t *testing.T, target, token, name, version, fileName, content string) *http.Response {
	t.Helper()
	body := &bytes.Buffer{}
	writer := multipart.NewWriter(body)
	_ = writer.WriteField("name", name)
	_ = writer.WriteField("version", version)
	fileWriter, err := writer.CreateFormFile("file", fileName)
	if err != nil {
		t.Fatal(err)
	}
	_, _ = fileWriter.Write([]byte(content))
	_ = writer.Close()
	request, err := http.NewRequest(http.MethodPost, target, body)
	if err != nil {
		t.Fatal(err)
	}
	request.Header.Set("Content-Type", writer.FormDataContentType())
	request.Header.Set("Authorization", "Bearer "+token)
	response, err := http.DefaultClient.Do(request)
	if err != nil {
		t.Fatal(err)
	}
	return response
}

func getRequest(t *testing.T, target, token string) *http.Response {
	t.Helper()
	request, err := http.NewRequest(http.MethodGet, target, nil)
	if err != nil {
		t.Fatal(err)
	}
	request.Header.Set("Authorization", "Bearer "+token)
	response, err := http.DefaultClient.Do(request)
	if err != nil {
		t.Fatal(err)
	}
	return response
}