feat(database): add repairSmokeAIAdviceIndexes function and corresponding tests

- Implemented repairSmokeAIAdviceIndexes to manage the unique index for fa_smoke_ai_advice.
- Added unit tests for the new function to ensure correct index recreation and validation.
- Updated AutoMigrate to include the new index repair function.

internal/database/database.go

@@ -102,6 +102,9 @@ func AutoMigrate(models ...interface{}) error {
 	if err := repairSmokeAINextSmokeIndexes(DB); err != nil {
 		return err
 	}
+	if err := repairSmokeAIAdviceIndexes(DB); err != nil {
+		return err
+	}
 	return nil
 }
 

internal/database/smoke_index_migration.go

@@ -56,3 +56,47 @@ func repairSmokeAINextSmokeIndexes(db *gorm.DB) error {
 
 	return nil
 }
+
+func repairSmokeAIAdviceIndexes(db *gorm.DB) error {
+	if db == nil {
+		return nil
+	}
+
+	const (
+		tableName = "fa_smoke_ai_advice"
+		indexName = "uniq_smoke_ai_advice"
+	)
+
+	var rows []mysqlIndexColumn
+	if err := db.Raw(fmt.Sprintf("SHOW INDEX FROM `%s` WHERE Key_name = ?", tableName), indexName).Scan(&rows).Error; err != nil {
+		return fmt.Errorf("inspect %s: %w", indexName, err)
+	}
+
+	expected := []string{"uid", "type", "advice_date", "prompt_version"}
+	actual := make([]string, 0, len(rows))
+	for _, row := range rows {
+		actual = append(actual, row.ColumnName)
+	}
+
+	if slices.Equal(actual, expected) {
+		return nil
+	}
+
+	if len(rows) > 0 {
+		if err := db.Exec(fmt.Sprintf("ALTER TABLE `%s` DROP INDEX `%s`", tableName, indexName)).Error; err != nil {
+			return fmt.Errorf("drop %s: %w", indexName, err)
+		}
+	}
+
+	if err := db.Exec(
+		fmt.Sprintf(
+			"ALTER TABLE `%s` ADD UNIQUE KEY `%s` (`uid`,`type`,`advice_date`,`prompt_version`)",
+			tableName,
+			indexName,
+		),
+	).Error; err != nil {
+		return fmt.Errorf("create %s: %w", indexName, err)
+	}
+
+	return nil
+}

internal/database/smoke_index_migration_test.go

@@ -79,3 +79,54 @@ func TestRepairSmokeAINextSmokeIndexesKeepsCorrectIndex(t *testing.T) {
 		t.Fatalf("unmet expectations: %v", err)
 	}
 }
+
+func TestRepairSmokeAIAdviceIndexesRecreatesBrokenIndex(t *testing.T) {
+	t.Parallel()
+
+	db, mock, cleanup := newMockDB(t)
+	defer cleanup()
+
+	mock.ExpectQuery("SHOW INDEX FROM `fa_smoke_ai_advice` WHERE Key_name = \\?").
+		WithArgs("uniq_smoke_ai_advice").
+		WillReturnRows(
+			sqlmock.NewRows([]string{"Key_name", "Seq_in_index", "Column_name"}).
+				AddRow("uniq_smoke_ai_advice", 1, "uid").
+				AddRow("uniq_smoke_ai_advice", 2, "advice_date").
+				AddRow("uniq_smoke_ai_advice", 3, "prompt_version"),
+		)
+	mock.ExpectExec("ALTER TABLE `fa_smoke_ai_advice` DROP INDEX `uniq_smoke_ai_advice`").
+		WillReturnResult(sqlmock.NewResult(0, 0))
+	mock.ExpectExec("ALTER TABLE `fa_smoke_ai_advice` ADD UNIQUE KEY `uniq_smoke_ai_advice` \\(`uid`,`type`,`advice_date`,`prompt_version`\\)").
+		WillReturnResult(sqlmock.NewResult(0, 0))
+
+	if err := repairSmokeAIAdviceIndexes(db); err != nil {
+		t.Fatalf("repairSmokeAIAdviceIndexes: %v", err)
+	}
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Fatalf("unmet expectations: %v", err)
+	}
+}
+
+func TestRepairSmokeAIAdviceIndexesKeepsCorrectIndex(t *testing.T) {
+	t.Parallel()
+
+	db, mock, cleanup := newMockDB(t)
+	defer cleanup()
+
+	mock.ExpectQuery("SHOW INDEX FROM `fa_smoke_ai_advice` WHERE Key_name = \\?").
+		WithArgs("uniq_smoke_ai_advice").
+		WillReturnRows(
+			sqlmock.NewRows([]string{"Key_name", "Seq_in_index", "Column_name"}).
+				AddRow("uniq_smoke_ai_advice", 1, "uid").
+				AddRow("uniq_smoke_ai_advice", 2, "type").
+				AddRow("uniq_smoke_ai_advice", 3, "advice_date").
+				AddRow("uniq_smoke_ai_advice", 4, "prompt_version"),
+		)
+
+	if err := repairSmokeAIAdviceIndexes(db); err != nil {
+		t.Fatalf("repairSmokeAIAdviceIndexes: %v", err)
+	}
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Fatalf("unmet expectations: %v", err)
+	}
+}

internal/smoke/service/smoke_ai_advice_service.go

@@ -112,7 +112,7 @@ func (s *SmokeAIAdviceService) GetOrGenerate(ctx context.Context, user *usermode
 		return nil, err
 	}
 
-	adviceText, modelName, tokensIn, tokensOut, err := s.callAI(ctx, snapshot)
+	adviceText, modelName, tokensIn, tokensOut, err := s.callAI(ctx, int(user.ID), snapshot)
 	if err != nil {
 		return nil, err
 	}
@@ -338,10 +338,11 @@ func loadAdviceUserProfile(ctx context.Context, db *gorm.DB, uid int) *adviceUse
 	return &out
 }
 
-func (s *SmokeAIAdviceService) callAI(ctx context.Context, snap adviceSnapshot) (string, string, *int, *int, error) {
+func (s *SmokeAIAdviceService) callAI(ctx context.Context, uid int, snap adviceSnapshot) (string, string, *int, *int, error) {
 	if s.cfg.APIKey == "" || s.cfg.Model == "" || s.cfg.BaseURL == "" {
 		return "", "", nil, nil, ErrAIServiceDisabled
 	}
+	requestModel := preferredSmokeAIModel(s.cfg.Model)
 
 	systemPrompt := strings.TrimSpace(`
 你是一名专业的戒烟教练与行为改变顾问。你需要基于用户昨天的抽烟总量与时间节点，给出可执行、可量化的戒烟/控烟建议。
@@ -358,9 +359,16 @@ func (s *SmokeAIAdviceService) callAI(ctx context.Context, snap adviceSnapshot)
 `)
 
 	userPrompt := fmt.Sprintf("用户昨日数据（JSON）：\n%s", mustJSON(snap))
+	appendSmokeAIDebugLog("daily_advice.request", map[string]interface{}{
+		"uid":           uid,
+		"model":         requestModel,
+		"system_prompt": systemPrompt,
+		"user_prompt":   userPrompt,
+		"input":         snap,
+	})
 
 	reqBody := chatCompletionRequest{
-		Model: s.cfg.Model,
+		Model: requestModel,
 		Messages: []chatMessage{
 			{Role: "system", Content: systemPrompt},
 			{Role: "user", Content: userPrompt},
@@ -391,6 +399,12 @@ func (s *SmokeAIAdviceService) callAI(ctx context.Context, snap adviceSnapshot)
 	if err != nil {
 		return "", "", nil, nil, fmt.Errorf("read ai response: %w", err)
 	}
+	appendSmokeAIDebugLog("daily_advice.response", map[string]interface{}{
+		"uid":           uid,
+		"model":         requestModel,
+		"http_status":   resp.StatusCode,
+		"response_body": string(body),
+	})
 	if resp.StatusCode != http.StatusOK {
 		return "", "", nil, nil, fmt.Errorf("ai http %d: %s", resp.StatusCode, truncateString(string(body), 512))
 	}
@@ -407,10 +421,13 @@ func (s *SmokeAIAdviceService) callAI(ctx context.Context, snap adviceSnapshot)
 	if content == "" {
 		return "", "", nil, nil, errors.New("ai response content is empty")
 	}
+	if jsonPart := extractJSONObject(content); jsonPart != "" {
+		content = jsonPart
+	}
 
 	modelName := parsed.Model
 	if modelName == "" {
-		modelName = s.cfg.Model
+		modelName = requestModel
 	}
 
 	var tokensIn, tokensOut *int
@@ -518,7 +535,7 @@ func (s *SmokeAIAdviceService) GetOrGenerateDailySummary(
 		return nil, err
 	}
 
-	adviceText, modelName, tokensIn, tokensOut, err := s.callAIDailySummary(ctx, snapshot)
+	adviceText, modelName, tokensIn, tokensOut, err := s.callAIDailySummary(ctx, int(user.ID), snapshot)
 	if err != nil {
 		return nil, err
 	}
@@ -545,10 +562,11 @@ func (s *SmokeAIAdviceService) GetOrGenerateDailySummary(
 	return &record, nil
 }
 
-func (s *SmokeAIAdviceService) callAIDailySummary(ctx context.Context, snap adviceSnapshot) (string, string, *int, *int, error) {
+func (s *SmokeAIAdviceService) callAIDailySummary(ctx context.Context, uid int, snap adviceSnapshot) (string, string, *int, *int, error) {
 	if s.cfg.APIKey == "" || s.cfg.Model == "" || s.cfg.BaseURL == "" {
 		return "", "", nil, nil, ErrAIServiceDisabled
 	}
+	requestModel := preferredSmokeAIModel(s.cfg.Model)
 
 	systemPrompt := strings.TrimSpace(`
 你是一名专业的戒烟教练。请基于用户今天的抽烟数据，生成一份简洁的每日总结。
@@ -567,9 +585,16 @@ func (s *SmokeAIAdviceService) callAIDailySummary(ctx context.Context, snap advi
 `)
 
 	userPrompt := fmt.Sprintf("用户今日抽烟数据（JSON）：\n%s", mustJSON(snap))
+	appendSmokeAIDebugLog("daily_summary.request", map[string]interface{}{
+		"uid":           uid,
+		"model":         requestModel,
+		"system_prompt": systemPrompt,
+		"user_prompt":   userPrompt,
+		"input":         snap,
+	})
 
 	reqBody := chatCompletionRequest{
-		Model: s.cfg.Model,
+		Model: requestModel,
 		Messages: []chatMessage{
 			{Role: "system", Content: systemPrompt},
 			{Role: "user", Content: userPrompt},
@@ -600,6 +625,12 @@ func (s *SmokeAIAdviceService) callAIDailySummary(ctx context.Context, snap advi
 	if err != nil {
 		return "", "", nil, nil, fmt.Errorf("read ai response: %w", err)
 	}
+	appendSmokeAIDebugLog("daily_summary.response", map[string]interface{}{
+		"uid":           uid,
+		"model":         requestModel,
+		"http_status":   resp.StatusCode,
+		"response_body": string(body),
+	})
 	if resp.StatusCode != http.StatusOK {
 		return "", "", nil, nil, fmt.Errorf("ai http %d: %s", resp.StatusCode, truncateString(string(body), 512))
 	}
@@ -619,7 +650,7 @@ func (s *SmokeAIAdviceService) callAIDailySummary(ctx context.Context, snap advi
 
 	modelName := parsed.Model
 	if modelName == "" {
-		modelName = s.cfg.Model
+		modelName = requestModel
 	}
 
 	var tokensIn, tokensOut *int

internal/smoke/service/smoke_ai_debug_log.go

@@ -0,0 +1,48 @@
+package service
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"time"
+)
+
+const smokeAIDebugLogDir = "/www/wwwroot/code/wx_service/runtime_logs"
+
+func smokeAIDebugLogPath(now time.Time) string {
+	day := now.In(time.Local).Format("2006-01-02")
+	return filepath.Join(smokeAIDebugLogDir, fmt.Sprintf("smoke_ai_%s.log", day))
+}
+
+func appendSmokeAIDebugLog(scene string, payload map[string]interface{}) {
+	if payload == nil {
+		payload = map[string]interface{}{}
+	}
+	now := time.Now().In(time.Local)
+	payload["scene"] = scene
+	payload["ts"] = now.Format(time.RFC3339)
+
+	body, err := json.MarshalIndent(payload, "", "  ")
+	if err != nil {
+		log.Printf("[smoke_ai_debug] marshal failed scene=%s err=%v", scene, err)
+		return
+	}
+
+	if err := os.MkdirAll(smokeAIDebugLogDir, 0o755); err != nil {
+		log.Printf("[smoke_ai_debug] mkdir failed scene=%s err=%v", scene, err)
+		return
+	}
+
+	f, err := os.OpenFile(smokeAIDebugLogPath(now), os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o644)
+	if err != nil {
+		log.Printf("[smoke_ai_debug] open failed scene=%s err=%v", scene, err)
+		return
+	}
+	defer f.Close()
+
+	if _, err := f.Write(append(body, '\n', '\n')); err != nil {
+		log.Printf("[smoke_ai_debug] write failed scene=%s err=%v", scene, err)
+	}
+}

internal/smoke/service/smoke_ai_model.go

@@ -0,0 +1,13 @@
+package service
+
+import "strings"
+
+// preferredSmokeAIModel 避免把高延迟 reasoning 模型用于首页/计划类交互接口。
+func preferredSmokeAIModel(model string) string {
+	normalized := strings.TrimSpace(model)
+	lower := strings.ToLower(normalized)
+	if strings.Contains(lower, "deepseek") && strings.Contains(lower, "reasoner") {
+		return "deepseek-chat"
+	}
+	return normalized
+}

internal/smoke/service/smoke_ai_model_test.go

@@ -0,0 +1,28 @@
+package service
+
+import "testing"
+
+func TestPreferredSmokeAIModel(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name  string
+		input string
+		want  string
+	}{
+		{name: "deepseek reasoner fallback", input: "deepseek-reasoner", want: "deepseek-chat"},
+		{name: "trim whitespace", input: " deepseek-reasoner ", want: "deepseek-chat"},
+		{name: "keep normal model", input: "gpt-4o-mini", want: "gpt-4o-mini"},
+		{name: "keep deepseek chat", input: "deepseek-chat", want: "deepseek-chat"},
+	}
+
+	for _, tc := range tests {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			if got := preferredSmokeAIModel(tc.input); got != tc.want {
+				t.Fatalf("preferredSmokeAIModel(%q)=%q, want=%q", tc.input, got, tc.want)
+			}
+		})
+	}
+}

internal/smoke/service/smoke_ai_next_smoke_service.go

@@ -154,7 +154,7 @@ func (s *SmokeAINextSmokeService) GetOrGenerate(ctx context.Context, user *userm
 	}
 	inputJSON, _ := json.Marshal(input)
 
-	output, outputJSON, modelName, tokensIn, tokensOut, err := s.callAI(ctx, input)
+	output, outputJSON, modelName, tokensIn, tokensOut, err := s.callAI(ctx, int(user.ID), input)
 	if err != nil {
 		return AINextSmokeSuggestion{}, err
 	}
@@ -249,6 +249,14 @@ func (s *SmokeAINextSmokeService) GetOrGenerate(ctx context.Context, user *userm
 	if err != nil {
 		return AINextSmokeSuggestion{}, err
 	}
+	if len(nodes) > 0 {
+		if firstNodeAt, err := parseFlexibleTime(nodes[0], planDate); err == nil {
+			suggestedAt = firstNodeAt.In(time.Local)
+			if suggestedAt.Before(notBeforeAt) {
+				suggestedAt = notBeforeAt
+			}
+		}
+	}
 
 	if cachedAdvice != nil {
 		if err := s.db.WithContext(ctx).
@@ -612,7 +620,9 @@ func (s *SmokeAINextSmokeService) saveNodes(ctx context.Context, uid int, planDa
 	return nil
 }
 
-func (s *SmokeAINextSmokeService) callAI(ctx context.Context, input aiNextSmokeInput) (aiNextSmokeOutput, []byte, string, *int, *int, error) {
+func (s *SmokeAINextSmokeService) callAI(ctx context.Context, uid int, input aiNextSmokeInput) (aiNextSmokeOutput, []byte, string, *int, *int, error) {
+	requestModel := preferredSmokeAIModel(s.cfg.Model)
+
 	systemPrompt := strings.TrimSpace(`
 你是一名专业的戒烟教练与行为改变顾问。你将收到一段 JSON，包含：
 - 现在时间(as_of)
@@ -638,9 +648,16 @@ func (s *SmokeAINextSmokeService) callAI(ctx context.Context, input aiNextSmokeI
 `)
 
 	userPrompt := fmt.Sprintf("输入(JSON)：\n%s", mustJSON(input))
+	appendSmokeAIDebugLog("next_smoke.request", map[string]interface{}{
+		"uid":           uid,
+		"model":         requestModel,
+		"system_prompt": systemPrompt,
+		"user_prompt":   userPrompt,
+		"input":         input,
+	})
 
 	reqBody := chatCompletionRequest{
-		Model: s.cfg.Model,
+		Model: requestModel,
 		Messages: []chatMessage{
 			{Role: "system", Content: systemPrompt},
 			{Role: "user", Content: userPrompt},
@@ -671,6 +688,12 @@ func (s *SmokeAINextSmokeService) callAI(ctx context.Context, input aiNextSmokeI
 	if err != nil {
 		return aiNextSmokeOutput{}, nil, "", nil, nil, fmt.Errorf("read ai response: %w", err)
 	}
+	appendSmokeAIDebugLog("next_smoke.response", map[string]interface{}{
+		"uid":           uid,
+		"model":         requestModel,
+		"http_status":   resp.StatusCode,
+		"response_body": string(body),
+	})
 	if resp.StatusCode != http.StatusOK {
 		return aiNextSmokeOutput{}, nil, "", nil, nil, fmt.Errorf("ai http %d: %s", resp.StatusCode, truncateString(string(body), 512))
 	}
@@ -700,7 +723,7 @@ func (s *SmokeAINextSmokeService) callAI(ctx context.Context, input aiNextSmokeI
 
 	modelName := parsed.Model
 	if modelName == "" {
-		modelName = s.cfg.Model
+		modelName = requestModel
 	}
 
 	var tokensIn, tokensOut *int