init
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Connor
253
application/services/ai_service.go
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253
application/services/ai_service.go
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package services
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import (
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"errors"
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"fmt"
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"github.com/drama-generator/backend/domain/models"
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"github.com/drama-generator/backend/pkg/ai"
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"github.com/drama-generator/backend/pkg/logger"
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"gorm.io/gorm"
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)
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type AIService struct {
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db *gorm.DB
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log *logger.Logger
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}
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func NewAIService(db *gorm.DB, log *logger.Logger) *AIService {
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return &AIService{
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db: db,
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log: log,
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}
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}
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type CreateAIConfigRequest struct {
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ServiceType string `json:"service_type" binding:"required,oneof=text image video"`
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Name string `json:"name" binding:"required,min=1,max=100"`
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BaseURL string `json:"base_url" binding:"required,url"`
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APIKey string `json:"api_key" binding:"required"`
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Model models.ModelField `json:"model" binding:"required"`
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Endpoint string `json:"endpoint"`
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QueryEndpoint string `json:"query_endpoint"`
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Priority int `json:"priority"`
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IsDefault bool `json:"is_default"`
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Settings string `json:"settings"`
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}
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type UpdateAIConfigRequest struct {
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Name string `json:"name" binding:"omitempty,min=1,max=100"`
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BaseURL string `json:"base_url" binding:"omitempty,url"`
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APIKey string `json:"api_key"`
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Model *models.ModelField `json:"model"`
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Endpoint string `json:"endpoint"`
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QueryEndpoint string `json:"query_endpoint"`
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Priority *int `json:"priority"`
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IsDefault bool `json:"is_default"`
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IsActive bool `json:"is_active"`
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Settings string `json:"settings"`
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}
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type TestConnectionRequest struct {
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BaseURL string `json:"base_url" binding:"required,url"`
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APIKey string `json:"api_key" binding:"required"`
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Model models.ModelField `json:"model" binding:"required"`
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Endpoint string `json:"endpoint"`
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}
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func (s *AIService) CreateConfig(req *CreateAIConfigRequest) (*models.AIServiceConfig, error) {
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config := &models.AIServiceConfig{
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ServiceType: req.ServiceType,
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Name: req.Name,
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BaseURL: req.BaseURL,
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APIKey: req.APIKey,
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Model: req.Model,
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Endpoint: req.Endpoint,
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QueryEndpoint: req.QueryEndpoint,
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Priority: req.Priority,
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IsDefault: req.IsDefault,
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IsActive: true,
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Settings: req.Settings,
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}
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if err := s.db.Create(config).Error; err != nil {
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s.log.Errorw("Failed to create AI config", "error", err)
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return nil, err
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}
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s.log.Infow("AI config created", "config_id", config.ID)
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return config, nil
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}
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func (s *AIService) GetConfig(configID uint) (*models.AIServiceConfig, error) {
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var config models.AIServiceConfig
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err := s.db.Where("id = ? ", configID).First(&config).Error
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, errors.New("config not found")
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}
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return nil, err
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}
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return &config, nil
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}
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func (s *AIService) ListConfigs(serviceType string) ([]models.AIServiceConfig, error) {
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var configs []models.AIServiceConfig
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query := s.db
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if serviceType != "" {
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query = query.Where("service_type = ?", serviceType)
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}
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err := query.Order("priority DESC, created_at DESC").Find(&configs).Error
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if err != nil {
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s.log.Errorw("Failed to list AI configs", "error", err)
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return nil, err
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}
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return configs, nil
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}
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func (s *AIService) UpdateConfig(configID uint, req *UpdateAIConfigRequest) (*models.AIServiceConfig, error) {
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var config models.AIServiceConfig
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if err := s.db.Where("id = ? ", configID).First(&config).Error; err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, errors.New("config not found")
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}
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return nil, err
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}
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tx := s.db.Begin()
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// 不再需要is_default独占逻辑
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updates := make(map[string]interface{})
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if req.Name != "" {
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updates["name"] = req.Name
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}
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if req.BaseURL != "" {
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updates["base_url"] = req.BaseURL
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}
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if req.APIKey != "" {
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updates["api_key"] = req.APIKey
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}
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if req.Model != nil && len(*req.Model) > 0 {
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updates["model"] = *req.Model
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}
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if req.Priority != nil {
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updates["priority"] = *req.Priority
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}
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if req.Endpoint != "" {
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updates["endpoint"] = req.Endpoint
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}
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// 允许清空query_endpoint，所以不检查是否为空
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updates["query_endpoint"] = req.QueryEndpoint
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if req.Settings != "" {
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updates["settings"] = req.Settings
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}
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updates["is_default"] = req.IsDefault
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updates["is_active"] = req.IsActive
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if err := tx.Model(&config).Updates(updates).Error; err != nil {
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tx.Rollback()
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s.log.Errorw("Failed to update AI config", "error", err)
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return nil, err
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}
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if err := tx.Commit().Error; err != nil {
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return nil, err
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}
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s.log.Infow("AI config updated", "config_id", configID)
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return &config, nil
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}
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func (s *AIService) DeleteConfig(configID uint) error {
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result := s.db.Where("id = ? ", configID).Delete(&models.AIServiceConfig{})
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if result.Error != nil {
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s.log.Errorw("Failed to delete AI config", "error", result.Error)
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return result.Error
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}
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if result.RowsAffected == 0 {
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return errors.New("config not found")
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}
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s.log.Infow("AI config deleted", "config_id", configID)
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return nil
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}
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func (s *AIService) TestConnection(req *TestConnectionRequest) error {
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// 使用第一个模型进行测试
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model := ""
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if len(req.Model) > 0 {
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model = req.Model[0]
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}
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client := ai.NewOpenAIClient(req.BaseURL, req.APIKey, model, req.Endpoint)
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return client.TestConnection()
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}
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func (s *AIService) GetDefaultConfig(serviceType string) (*models.AIServiceConfig, error) {
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var config models.AIServiceConfig
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// 按优先级降序获取第一个启用的配置
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err := s.db.Where("service_type = ? AND is_active = ?", serviceType, true).
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Order("priority DESC, created_at DESC").
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First(&config).Error
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, errors.New("no active config found")
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}
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return nil, err
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}
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return &config, nil
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}
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// GetConfigForModel 根据服务类型和模型名称获取优先级最高的启用配置
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func (s *AIService) GetConfigForModel(serviceType string, modelName string) (*models.AIServiceConfig, error) {
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var configs []models.AIServiceConfig
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err := s.db.Where("service_type = ? AND is_active = ?", serviceType, true).
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Order("priority DESC, created_at DESC").
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Find(&configs).Error
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if err != nil {
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return nil, err
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}
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// 查找包含指定模型的配置
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for _, config := range configs {
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for _, model := range config.Model {
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if model == modelName {
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return &config, nil
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}
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}
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}
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return nil, errors.New("no config found for model: " + modelName)
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}
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func (s *AIService) GetAIClient(serviceType string) (*ai.OpenAIClient, error) {
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config, err := s.GetDefaultConfig(serviceType)
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if err != nil {
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return nil, err
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}
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// 使用第一个模型
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model := ""
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if len(config.Model) > 0 {
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model = config.Model[0]
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}
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return ai.NewOpenAIClient(config.BaseURL, config.APIKey, model, config.Endpoint), nil
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}
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func (s *AIService) GenerateText(prompt string, systemPrompt string, options ...func(*ai.ChatCompletionRequest)) (string, error) {
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client, err := s.GetAIClient("text")
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if err != nil {
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return "", fmt.Errorf("failed to get AI client: %w", err)
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}
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return client.GenerateText(prompt, systemPrompt, options...)
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}
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