// conversion_test.go — handler-level unit tests for /api/conversion/*。
//
// 用 in-package stub 實作 conversion.Service，測 handler 層轉接、路由註冊、
// 錯誤對應的正確性。實際 Service 行為（multipart 重組、ownership rebuild、
// promote → FAA pull → finalize）由 internal/conversion/*_test.go 覆蓋。
//
// Phase 0.8 conversion (見 .autoflow/04-architecture/api/api-conversion.md)
package api

import (
	"context"
	"encoding/json"
	"errors"
	"io"
	"net/http"
	"net/http/httptest"
	"strings"
	"sync"
	"testing"
	"time"

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"visiona-backend/internal/conversion"
)

// ==========================================================================
// Service stub
// ==========================================================================

// stubConversionService 是 conversion.Service 的測試 stub。
//
// 每個 method 都有對應的 InitJobFn / GetJobFn / ... 欄位，由 test case 注入想要的行為。
// 沒注入的 method 預設回 (nil, nil) — 對應 method 不被呼叫的 case。
//
// goroutine-safe：所有欄位由 test setup 階段一次性寫入，handler 呼叫時只讀。
type stubConversionService struct {
	mu sync.Mutex

	// 紀錄上一次呼叫的參數，給 test 驗 user_id 注入正確（trust boundary）
	lastUserID string
	lastJobID  string

	InitJobFn   func(ctx context.Context, in conversion.InitJobInput) (*conversion.Job, error)
	GetJobFn    func(ctx context.Context, userID, jobID string) (*conversion.Job, error)
	ActiveJobFn func(ctx context.Context, userID string) (*conversion.Job, error)
	PromoteFn   func(ctx context.Context, userID, jobID, name string) (*conversion.PromoteResult, error)
	DownloadFn  func(ctx context.Context, userID, jobID string) (string, error)
}

func (s *stubConversionService) InitJob(ctx context.Context, in conversion.InitJobInput) (*conversion.Job, error) {
	s.mu.Lock()
	s.lastUserID = in.UserID
	s.mu.Unlock()
	if s.InitJobFn == nil {
		return nil, errors.New("stub: InitJobFn not set")
	}
	return s.InitJobFn(ctx, in)
}

func (s *stubConversionService) GetJob(ctx context.Context, userID, jobID string) (*conversion.Job, error) {
	s.mu.Lock()
	s.lastUserID = userID
	s.lastJobID = jobID
	s.mu.Unlock()
	if s.GetJobFn == nil {
		return nil, errors.New("stub: GetJobFn not set")
	}
	return s.GetJobFn(ctx, userID, jobID)
}

func (s *stubConversionService) ActiveJob(ctx context.Context, userID string) (*conversion.Job, error) {
	s.mu.Lock()
	s.lastUserID = userID
	s.mu.Unlock()
	if s.ActiveJobFn == nil {
		return nil, errors.New("stub: ActiveJobFn not set")
	}
	return s.ActiveJobFn(ctx, userID)
}

func (s *stubConversionService) PromoteToModels(ctx context.Context, userID, jobID, name string) (*conversion.PromoteResult, error) {
	s.mu.Lock()
	s.lastUserID = userID
	s.lastJobID = jobID
	s.mu.Unlock()
	if s.PromoteFn == nil {
		return nil, errors.New("stub: PromoteFn not set")
	}
	return s.PromoteFn(ctx, userID, jobID, name)
}

func (s *stubConversionService) DownloadRedirectURL(ctx context.Context, userID, jobID string) (string, error) {
	s.mu.Lock()
	s.lastUserID = userID
	s.lastJobID = jobID
	s.mu.Unlock()
	if s.DownloadFn == nil {
		return "", errors.New("stub: DownloadFn not set")
	}
	return s.DownloadFn(ctx, userID, jobID)
}

// ==========================================================================
// Fixture
// ==========================================================================

// newConversionFixture 建一個只裝 conversion routes 的 gin engine。
//
// 所有 handler 都跑在 injectStaticUserContext("demo-user", ...) 之後 —
// 模擬「user 已登入」場景；驗 AuthMiddleware 行為由 oidc_auth_test 負責。
func newConversionFixture(t *testing.T, svc conversion.Service) *gin.Engine {
	t.Helper()
	r := gin.New()
	r.Use(RequestIDMiddleware())
	r.Use(injectStaticUserContext("demo-user", "demo@example.com"))
	g := r.Group("/api")
	registerConversionRoutes(g, Deps{Conversion: svc})
	return r
}

// sampleJob 是一個典型的成功 job — 給 happy path 用。
func sampleJob() *conversion.Job {
	now := time.Date(2026, 4, 30, 12, 0, 0, 0, time.UTC)
	return &conversion.Job{
		JobID:          "job-abc-123",
		Status:         "running",
		Stage:          "onnx",
		Progress:       0,
		StageProgress:  0,
		CreatedAt:      now,
		UpdatedAt:      now,
		ExpiresAt:      now.Add(7 * 24 * time.Hour),
		SourceFilename: "yolov5s.onnx",
		TargetChip:     "720",
	}
}

// ==========================================================================
// 0. 共通：未啟用時 5 個 endpoint 全 501
// ==========================================================================

// TestConversion_Disabled_All501 — 當 deps.Conversion = nil 時，5 個 endpoint 全回 501。
//
// 對齊 main.go：cfg.Conversion.Enabled() == false 時 deps.Conversion 為 nil。
func TestConversion_Disabled_All501(t *testing.T) {
	r := gin.New()
	r.Use(RequestIDMiddleware())
	r.Use(injectStaticUserContext("demo-user", ""))
	g := r.Group("/api")
	registerConversionRoutes(g, Deps{Conversion: nil}) // 未啟用

	cases := []struct {
		method string
		path   string
	}{
		{http.MethodPost, "/api/conversion/init"},
		{http.MethodGet, "/api/conversion/active"},
		{http.MethodGet, "/api/conversion/job-1"},
		{http.MethodPost, "/api/conversion/job-1/promote-to-models"},
		{http.MethodGet, "/api/conversion/job-1/download"},
	}
	for _, c := range cases {
		t.Run(c.method+" "+c.path, func(t *testing.T) {
			req := httptest.NewRequest(c.method, c.path, nil)
			if c.method == http.MethodPost {
				req.Header.Set("Content-Type", "application/json")
			}
			w := httptest.NewRecorder()
			r.ServeHTTP(w, req)
			assert.Equal(t, http.StatusNotImplemented, w.Code,
				"%s %s should be 501 when Conversion=nil; body=%s", c.method, c.path, w.Body.String())
		})
	}
}

// ==========================================================================
// 1. POST /api/conversion/init
// ==========================================================================

// TestConversion_Init_HappyPath — 成功 init 回 201 + Job。
func TestConversion_Init_HappyPath(t *testing.T) {
	job := sampleJob()
	svc := &stubConversionService{
		InitJobFn: func(ctx context.Context, in conversion.InitJobInput) (*conversion.Job, error) {
			// 驗 user_id 正確注入（trust boundary）
			require.Equal(t, "demo-user", in.UserID)
			require.NotEmpty(t, in.ContentType)
			require.NotNil(t, in.Body)
			// 驗 body 有內容（streaming reader 還沒被讀）
			b, err := io.ReadAll(in.Body)
			require.NoError(t, err)
			require.Contains(t, string(b), "fake-multipart")
			return job, nil
		},
	}
	r := newConversionFixture(t, svc)

	body := strings.NewReader("--xyz\r\nContent-Disposition: form-data; name=\"fake-multipart\"\r\n\r\ndata\r\n--xyz--\r\n")
	req := httptest.NewRequest(http.MethodPost, "/api/conversion/init", body)
	req.Header.Set("Content-Type", "multipart/form-data; boundary=xyz")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	require.Equal(t, http.StatusCreated, w.Code, "body=%s", w.Body.String())

	var sb SuccessBody
	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &sb))
	data := sb.Data.(map[string]any)
	assert.Equal(t, "job-abc-123", data["job_id"])
	assert.Equal(t, "running", data["status"])
	assert.Equal(t, "yolov5s.onnx", data["source_filename"])
	assert.Equal(t, "720", data["target_chip"])
}

// TestConversion_Init_BadContentType — Content-Type 非 multipart/form-data 回 400。
//
// 這擋下 client 傳 JSON 等錯誤格式（避免 Service 層白白讀完 body 才發現格式錯）。
func TestConversion_Init_BadContentType(t *testing.T) {
	svc := &stubConversionService{} // 不應該被呼叫
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodPost, "/api/conversion/init",
		strings.NewReader(`{"foo":"bar"}`))
	req.Header.Set("Content-Type", "application/json") // 錯誤
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)
	assert.Contains(t, w.Body.String(), ErrCodeValidationFailed)
	assert.Contains(t, w.Body.String(), "multipart/form-data")
}

// TestConversion_Init_ActiveJobError — ActiveJobError 回 409 + extra.active_job。
//
// 這個 case 驗 handleConversionError 對 errors.As(*ActiveJobError) 的特殊處理。
func TestConversion_Init_ActiveJobError(t *testing.T) {
	existingJob := &conversion.Job{
		JobID:    "job-existing-456",
		Status:   "running",
		Stage:    "bie",
		Progress: 45,
	}
	svc := &stubConversionService{
		InitJobFn: func(ctx context.Context, in conversion.InitJobInput) (*conversion.Job, error) {
			return nil, &conversion.ActiveJobError{Job: existingJob}
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodPost, "/api/conversion/init",
		strings.NewReader("--xyz\r\n--xyz--\r\n"))
	req.Header.Set("Content-Type", "multipart/form-data; boundary=xyz")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	require.Equal(t, http.StatusConflict, w.Code, "body=%s", w.Body.String())

	var eb ErrorBody
	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &eb))
	require.NotNil(t, eb.Error)
	assert.Equal(t, "active_job_exists", eb.Error.Code)
	require.NotNil(t, eb.Error.Extra)
	activeJob, ok := eb.Error.Extra["active_job"].(map[string]any)
	require.True(t, ok, "extra.active_job should be object; got %v", eb.Error.Extra)
	assert.Equal(t, "job-existing-456", activeJob["job_id"])
}

// TestConversion_Init_ValidationError — ConverterValidationError 回 400 + details.fields。
func TestConversion_Init_ValidationError(t *testing.T) {
	svc := &stubConversionService{
		InitJobFn: func(ctx context.Context, in conversion.InitJobInput) (*conversion.Job, error) {
			return nil, &conversion.ConverterValidationError{
				Fields: []conversion.ValidationFieldError{
					{Field: "model_id", Message: "must be 1-65535"},
				},
				Message: "validation failed",
			}
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodPost, "/api/conversion/init",
		strings.NewReader("--xyz\r\n--xyz--\r\n"))
	req.Header.Set("Content-Type", "multipart/form-data; boundary=xyz")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	require.Equal(t, http.StatusBadRequest, w.Code, "body=%s", w.Body.String())
	var eb ErrorBody
	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &eb))
	assert.Equal(t, "validation_failed", eb.Error.Code)
	require.Len(t, eb.Error.Details, 1)
	assert.Equal(t, "model_id", eb.Error.Details[0].Field)
}

// TestConversion_Init_ConverterUnavailable — 502 mapping。
func TestConversion_Init_ConverterUnavailable(t *testing.T) {
	svc := &stubConversionService{
		InitJobFn: func(ctx context.Context, in conversion.InitJobInput) (*conversion.Job, error) {
			return nil, conversion.ErrConverterUnavailable
		},
	}
	r := newConversionFixture(t, svc)
	req := httptest.NewRequest(http.MethodPost, "/api/conversion/init",
		strings.NewReader("--xyz\r\n--xyz--\r\n"))
	req.Header.Set("Content-Type", "multipart/form-data; boundary=xyz")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadGateway, w.Code)
	assert.Contains(t, w.Body.String(), "converter_unavailable")
}

// ==========================================================================
// 2. GET /api/conversion/active
// ==========================================================================

func TestConversion_Active_HasActive(t *testing.T) {
	job := sampleJob()
	svc := &stubConversionService{
		ActiveJobFn: func(ctx context.Context, userID string) (*conversion.Job, error) {
			require.Equal(t, "demo-user", userID)
			return job, nil
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodGet, "/api/conversion/active", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	require.Equal(t, http.StatusOK, w.Code, "body=%s", w.Body.String())
	var sb SuccessBody
	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &sb))
	data := sb.Data.(map[string]any)
	assert.Equal(t, true, data["has_active"])
	jobMap, ok := data["job"].(map[string]any)
	require.True(t, ok)
	assert.Equal(t, "job-abc-123", jobMap["job_id"])
}

func TestConversion_Active_NoActive(t *testing.T) {
	svc := &stubConversionService{
		ActiveJobFn: func(ctx context.Context, userID string) (*conversion.Job, error) {
			return nil, nil
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodGet, "/api/conversion/active", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	require.Equal(t, http.StatusOK, w.Code)
	var sb SuccessBody
	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &sb))
	data := sb.Data.(map[string]any)
	assert.Equal(t, false, data["has_active"])
	assert.Nil(t, data["job"])
}

func TestConversion_Active_ConverterUnavailable(t *testing.T) {
	svc := &stubConversionService{
		ActiveJobFn: func(ctx context.Context, userID string) (*conversion.Job, error) {
			return nil, conversion.ErrConverterUnavailable
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodGet, "/api/conversion/active", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)
	assert.Equal(t, http.StatusBadGateway, w.Code)
}

// ==========================================================================
// 3. GET /api/conversion/{job_id}
// ==========================================================================

func TestConversion_Get_HappyPath(t *testing.T) {
	job := sampleJob()
	svc := &stubConversionService{
		GetJobFn: func(ctx context.Context, userID, jobID string) (*conversion.Job, error) {
			require.Equal(t, "demo-user", userID)
			require.Equal(t, "job-abc-123", jobID)
			return job, nil
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodGet, "/api/conversion/job-abc-123", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	require.Equal(t, http.StatusOK, w.Code, "body=%s", w.Body.String())
	var sb SuccessBody
	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &sb))
	data := sb.Data.(map[string]any)
	assert.Equal(t, "job-abc-123", data["job_id"])
	assert.Equal(t, "running", data["status"])
}

func TestConversion_Get_NotFound(t *testing.T) {
	svc := &stubConversionService{
		GetJobFn: func(ctx context.Context, userID, jobID string) (*conversion.Job, error) {
			return nil, conversion.ErrJobNotFound
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodGet, "/api/conversion/missing-job", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusNotFound, w.Code)
	assert.Contains(t, w.Body.String(), "not_found")
}

// ==========================================================================
// 4. POST /api/conversion/{job_id}/promote-to-models
// ==========================================================================

func TestConversion_Promote_HappyPath(t *testing.T) {
	now := time.Date(2026, 4, 30, 12, 30, 0, 0, time.UTC)
	res := &conversion.PromoteResult{
		ModelID:     "model-xyz",
		Source:      "converted",
		SourceJobID: "job-abc-123",
		Name:        "yolo_kl720",
		TargetChip:  "kl720",
		FileSize:    12345,
		Status:      "ready",
		CreatedAt:   now,
	}
	svc := &stubConversionService{
		PromoteFn: func(ctx context.Context, userID, jobID, name string) (*conversion.PromoteResult, error) {
			require.Equal(t, "demo-user", userID)
			require.Equal(t, "job-abc-123", jobID)
			require.Equal(t, "yolo_kl720", name)
			return res, nil
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodPost, "/api/conversion/job-abc-123/promote-to-models",
		strings.NewReader(`{"name":"yolo_kl720"}`))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	require.Equal(t, http.StatusCreated, w.Code, "body=%s", w.Body.String())

	var sb SuccessBody
	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &sb))
	data := sb.Data.(map[string]any)
	assert.Equal(t, "model-xyz", data["model_id"])
	assert.Equal(t, "converted", data["source"])
	assert.Equal(t, "ready", data["status"])
}

// TestConversion_Promote_NoBody — 沒帶 body 也應該成功（name 可為空）。
func TestConversion_Promote_NoBody(t *testing.T) {
	svc := &stubConversionService{
		PromoteFn: func(ctx context.Context, userID, jobID, name string) (*conversion.PromoteResult, error) {
			require.Equal(t, "", name) // body 沒帶 → name 為空，由 Service fallback
			return &conversion.PromoteResult{ModelID: "m1", Source: "converted", Status: "ready"}, nil
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodPost, "/api/conversion/job-abc/promote-to-models", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)
	assert.Equal(t, http.StatusCreated, w.Code, "body=%s", w.Body.String())
}

func TestConversion_Promote_BadJSON(t *testing.T) {
	svc := &stubConversionService{} // 不該被呼叫
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodPost, "/api/conversion/job/promote-to-models",
		strings.NewReader(`{not valid json`))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)
	assert.Equal(t, http.StatusBadRequest, w.Code)
	assert.Contains(t, w.Body.String(), ErrCodeValidationFailed)
}

func TestConversion_Promote_JobNotCompleted(t *testing.T) {
	svc := &stubConversionService{
		PromoteFn: func(ctx context.Context, userID, jobID, name string) (*conversion.PromoteResult, error) {
			return nil, conversion.ErrJobNotCompleted
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodPost, "/api/conversion/job-abc/promote-to-models",
		strings.NewReader(`{}`))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)
	assert.Equal(t, http.StatusConflict, w.Code)
	assert.Contains(t, w.Body.String(), "job_not_completed")
}

// ==========================================================================
// 5. GET /api/conversion/{job_id}/download
// ==========================================================================

func TestConversion_Download_HappyPath302(t *testing.T) {
	target := "http://192.168.0.130:5081/files/models/u/job.nef?access_token=opaque-xyz"
	svc := &stubConversionService{
		DownloadFn: func(ctx context.Context, userID, jobID string) (string, error) {
			require.Equal(t, "demo-user", userID)
			require.Equal(t, "job-abc", jobID)
			return target, nil
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodGet, "/api/conversion/job-abc/download", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusFound, w.Code) // 302
	assert.Equal(t, target, w.Header().Get("Location"))

	// 防快取 header — token 不該被 browser cache（§10.4）
	assert.Contains(t, w.Header().Get("Cache-Control"), "no-store")
	assert.Equal(t, "no-cache", w.Header().Get("Pragma"))
}

func TestConversion_Download_JobNotCompleted(t *testing.T) {
	svc := &stubConversionService{
		DownloadFn: func(ctx context.Context, userID, jobID string) (string, error) {
			return "", conversion.ErrJobNotCompleted
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodGet, "/api/conversion/job-abc/download", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	// 錯誤情況**不 redirect** — 回標準 JSON error
	assert.Equal(t, http.StatusConflict, w.Code)
	assert.Contains(t, w.Body.String(), "job_not_completed")
	assert.NotEqual(t, http.StatusFound, w.Code, "error case must not 302 redirect")
}

func TestConversion_Download_NotFound(t *testing.T) {
	svc := &stubConversionService{
		DownloadFn: func(ctx context.Context, userID, jobID string) (string, error) {
			return "", conversion.ErrJobNotFound
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodGet, "/api/conversion/missing/download", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)
	assert.Equal(t, http.StatusNotFound, w.Code)
}

func TestConversion_Download_MCTokenUnavailable(t *testing.T) {
	svc := &stubConversionService{
		DownloadFn: func(ctx context.Context, userID, jobID string) (string, error) {
			return "", conversion.ErrMCTokenUnavailable
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodGet, "/api/conversion/job/download", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)
	assert.Equal(t, http.StatusBadGateway, w.Code)
	assert.Contains(t, w.Body.String(), "mc_token_unavailable")
}

// ==========================================================================
// User_id trust boundary
// ==========================================================================

// TestConversion_Init_IgnoresClientUserID — 即使 multipart form 帶 user_id，handler
// 仍只把 cookie session 的 UserID 傳給 Service。
//
// 這是 trust boundary 的回歸測試（conversion.md §7）。實際 multipart 重組 / 黑名單
// 邏輯在 Service 層做（flow.go rebuildMultipart），但 handler 必須確保傳給 Service 的
// InitJobInput.UserID 永遠是 UserContext 的，不是 client 提供的。
func TestConversion_Init_IgnoresClientUserID(t *testing.T) {
	svc := &stubConversionService{
		InitJobFn: func(ctx context.Context, in conversion.InitJobInput) (*conversion.Job, error) {
			// 即使 client 在 multipart 內塞了 user_id=attacker，handler 給 Service 的 UserID
			// 必須是 demo-user（從 UserContext 拿）
			require.Equal(t, "demo-user", in.UserID)
			return sampleJob(), nil
		},
	}
	r := newConversionFixture(t, svc)

	// 一個包含 user_id=attacker 的 multipart body — 應被忽略
	body := strings.NewReader(
		"--xyz\r\n" +
			"Content-Disposition: form-data; name=\"user_id\"\r\n\r\n" +
			"attacker\r\n" +
			"--xyz\r\n" +
			"Content-Disposition: form-data; name=\"model\"\r\n\r\n" +
			"data\r\n" +
			"--xyz--\r\n",
	)
	req := httptest.NewRequest(http.MethodPost, "/api/conversion/init", body)
	req.Header.Set("Content-Type", "multipart/form-data; boundary=xyz")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	require.Equal(t, http.StatusCreated, w.Code, "body=%s", w.Body.String())
}

// TestConversion_GetJob_IgnoresQueryUserID — query 帶 user_id 不影響 handler
// 傳給 Service 的 userID（仍是 UserContext 拿到的）。
func TestConversion_GetJob_IgnoresQueryUserID(t *testing.T) {
	svc := &stubConversionService{
		GetJobFn: func(ctx context.Context, userID, jobID string) (*conversion.Job, error) {
			require.Equal(t, "demo-user", userID, "user_id from query must be ignored")
			return sampleJob(), nil
		},
	}
	r := newConversionFixture(t, svc)

	req := httptest.NewRequest(http.MethodGet, "/api/conversion/job-abc?user_id=attacker", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)
	require.Equal(t, http.StatusOK, w.Code)
}