1package provider
2
3import (
4 "context"
5 "fmt"
6
7 "github.com/opencode-ai/opencode/internal/llm/models"
8 "github.com/opencode-ai/opencode/internal/llm/tools"
9 "github.com/opencode-ai/opencode/internal/message"
10)
11
12type EventType string
13
14const maxRetries = 8
15
16const (
17 EventContentStart EventType = "content_start"
18 EventToolUseStart EventType = "tool_use_start"
19 EventToolUseDelta EventType = "tool_use_delta"
20 EventToolUseStop EventType = "tool_use_stop"
21 EventContentDelta EventType = "content_delta"
22 EventThinkingDelta EventType = "thinking_delta"
23 EventContentStop EventType = "content_stop"
24 EventComplete EventType = "complete"
25 EventError EventType = "error"
26 EventWarning EventType = "warning"
27)
28
29type TokenUsage struct {
30 InputTokens int64
31 OutputTokens int64
32 CacheCreationTokens int64
33 CacheReadTokens int64
34}
35
36type ProviderResponse struct {
37 Content string
38 ToolCalls []message.ToolCall
39 Usage TokenUsage
40 FinishReason message.FinishReason
41}
42
43type ProviderEvent struct {
44 Type EventType
45
46 Content string
47 Thinking string
48 Response *ProviderResponse
49 ToolCall *message.ToolCall
50 Error error
51}
52type Provider interface {
53 SendMessages(ctx context.Context, messages []message.Message, tools []tools.BaseTool) (*ProviderResponse, error)
54
55 StreamResponse(ctx context.Context, messages []message.Message, tools []tools.BaseTool) <-chan ProviderEvent
56
57 Model() models.Model
58}
59
60type providerClientOptions struct {
61 apiKey string
62 model models.Model
63 maxTokens int64
64 systemMessage string
65
66 anthropicOptions []AnthropicOption
67 openaiOptions []OpenAIOption
68 geminiOptions []GeminiOption
69 bedrockOptions []BedrockOption
70}
71
72type ProviderClientOption func(*providerClientOptions)
73
74type ProviderClient interface {
75 send(ctx context.Context, messages []message.Message, tools []tools.BaseTool) (*ProviderResponse, error)
76 stream(ctx context.Context, messages []message.Message, tools []tools.BaseTool) <-chan ProviderEvent
77}
78
79type baseProvider[C ProviderClient] struct {
80 options providerClientOptions
81 client C
82}
83
84func NewProvider(providerName models.ModelProvider, opts ...ProviderClientOption) (Provider, error) {
85 clientOptions := providerClientOptions{}
86 for _, o := range opts {
87 o(&clientOptions)
88 }
89 switch providerName {
90 case models.ProviderAnthropic:
91 return &baseProvider[AnthropicClient]{
92 options: clientOptions,
93 client: newAnthropicClient(clientOptions),
94 }, nil
95 case models.ProviderOpenAI:
96 return &baseProvider[OpenAIClient]{
97 options: clientOptions,
98 client: newOpenAIClient(clientOptions),
99 }, nil
100 case models.ProviderGemini:
101 return &baseProvider[GeminiClient]{
102 options: clientOptions,
103 client: newGeminiClient(clientOptions),
104 }, nil
105 case models.ProviderBedrock:
106 return &baseProvider[BedrockClient]{
107 options: clientOptions,
108 client: newBedrockClient(clientOptions),
109 }, nil
110 case models.ProviderGROQ:
111 clientOptions.openaiOptions = append(clientOptions.openaiOptions,
112 WithOpenAIBaseURL("https://api.groq.com/openai/v1"),
113 )
114 return &baseProvider[OpenAIClient]{
115 options: clientOptions,
116 client: newOpenAIClient(clientOptions),
117 }, nil
118 case models.ProviderAzure:
119 return &baseProvider[AzureClient]{
120 options: clientOptions,
121 client: newAzureClient(clientOptions),
122 }, nil
123 case models.ProviderOpenRouter:
124 clientOptions.openaiOptions = append(clientOptions.openaiOptions,
125 WithOpenAIBaseURL("https://openrouter.ai/api/v1"),
126 WithOpenAIExtraHeaders(map[string]string{
127 "HTTP-Referer": "opencode.ai",
128 "X-Title": "OpenCode",
129 }),
130 )
131 return &baseProvider[OpenAIClient]{
132 options: clientOptions,
133 client: newOpenAIClient(clientOptions),
134 }, nil
135 case models.ProviderXAI:
136 clientOptions.openaiOptions = append(clientOptions.openaiOptions,
137 WithOpenAIBaseURL("https://api.x.ai/v1"),
138 )
139 return &baseProvider[OpenAIClient]{
140 options: clientOptions,
141 client: newOpenAIClient(clientOptions),
142 }, nil
143
144 case models.ProviderMock:
145 // TODO: implement mock client for test
146 panic("not implemented")
147 }
148 return nil, fmt.Errorf("provider not supported: %s", providerName)
149}
150
151func (p *baseProvider[C]) cleanMessages(messages []message.Message) (cleaned []message.Message) {
152 for _, msg := range messages {
153 // The message has no content
154 if len(msg.Parts) == 0 {
155 continue
156 }
157 cleaned = append(cleaned, msg)
158 }
159 return
160}
161
162func (p *baseProvider[C]) SendMessages(ctx context.Context, messages []message.Message, tools []tools.BaseTool) (*ProviderResponse, error) {
163 messages = p.cleanMessages(messages)
164 return p.client.send(ctx, messages, tools)
165}
166
167func (p *baseProvider[C]) Model() models.Model {
168 return p.options.model
169}
170
171func (p *baseProvider[C]) StreamResponse(ctx context.Context, messages []message.Message, tools []tools.BaseTool) <-chan ProviderEvent {
172 messages = p.cleanMessages(messages)
173 return p.client.stream(ctx, messages, tools)
174}
175
176func WithAPIKey(apiKey string) ProviderClientOption {
177 return func(options *providerClientOptions) {
178 options.apiKey = apiKey
179 }
180}
181
182func WithModel(model models.Model) ProviderClientOption {
183 return func(options *providerClientOptions) {
184 options.model = model
185 }
186}
187
188func WithMaxTokens(maxTokens int64) ProviderClientOption {
189 return func(options *providerClientOptions) {
190 options.maxTokens = maxTokens
191 }
192}
193
194func WithSystemMessage(systemMessage string) ProviderClientOption {
195 return func(options *providerClientOptions) {
196 options.systemMessage = systemMessage
197 }
198}
199
200func WithAnthropicOptions(anthropicOptions ...AnthropicOption) ProviderClientOption {
201 return func(options *providerClientOptions) {
202 options.anthropicOptions = anthropicOptions
203 }
204}
205
206func WithOpenAIOptions(openaiOptions ...OpenAIOption) ProviderClientOption {
207 return func(options *providerClientOptions) {
208 options.openaiOptions = openaiOptions
209 }
210}
211
212func WithGeminiOptions(geminiOptions ...GeminiOption) ProviderClientOption {
213 return func(options *providerClientOptions) {
214 options.geminiOptions = geminiOptions
215 }
216}
217
218func WithBedrockOptions(bedrockOptions ...BedrockOption) ProviderClientOption {
219 return func(options *providerClientOptions) {
220 options.bedrockOptions = bedrockOptions
221 }
222}