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package llm
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import (
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"context"
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"io"
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"github.com/yourname/cyrene-ai/ai-core/internal/model"
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)
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// Adapter LLM适配器接口
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// 支持不同的LLM后端(OpenAI、Ollama、vLLM等)
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type Adapter struct {
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provider LLMProvider
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}
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// LLMProvider LLM提供商接口
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type LLMProvider interface {
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// Chat 同步对话
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Chat(ctx context.Context, messages []model.LLMMessage) (*model.LLMResponse, error)
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// ChatStream 流式对话,返回一个channel逐token推送
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ChatStream(ctx context.Context, messages []model.LLMMessage) (<-chan StreamChunk, error)
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// ModelName 返回当前使用的模型名称
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ModelName() string
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}
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// StreamChunk 流式响应的单个片段
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type StreamChunk struct {
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Content string // delta内容
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Done bool // 是否为最后一块
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Error error // 错误信息
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Usage *model.Usage // 最后一块时返回token统计
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}
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// NewAdapter 创建LLM适配器
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func NewAdapter(provider LLMProvider) *Adapter {
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return &Adapter{provider: provider}
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}
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// Chat 同步对话
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func (a *Adapter) Chat(ctx context.Context, messages []model.LLMMessage) (*model.LLMResponse, error) {
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return a.provider.Chat(ctx, messages)
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}
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// ChatStream 流式对话
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func (a *Adapter) ChatStream(ctx context.Context, messages []model.LLMMessage) (<-chan StreamChunk, error) {
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return a.provider.ChatStream(ctx, messages)
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}
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// ModelName 返回模型名称
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func (a *Adapter) ModelName() string {
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return a.provider.ModelName()
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}
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// collectStream 辅助函数:将流式响应收集为完整响应
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func collectStream(ch <-chan StreamChunk) (*model.LLMResponse, error) {
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var content string
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var lastUsage *model.Usage
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for chunk := range ch {
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if chunk.Error != nil {
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return nil, chunk.Error
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}
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if chunk.Done {
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lastUsage = chunk.Usage
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break
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}
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content += chunk.Content
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}
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resp := &model.LLMResponse{
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Content: content,
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FinishReason: "stop",
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}
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if lastUsage != nil {
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resp.Usage = *lastUsage
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}
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return resp, nil
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}
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// Ensure io is used (will be needed for SSE parsing)
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var _ io.Reader
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