1use anyhow::{Result, anyhow};
2use collections::{BTreeMap, HashMap};
3use deepseek::DEEPSEEK_API_URL;
4
5use futures::Stream;
6use futures::{FutureExt, StreamExt, future::BoxFuture, stream::BoxStream};
7use gpui::{AnyView, App, AsyncApp, Context, Entity, SharedString, Task, Window};
8use http_client::HttpClient;
9use language_model::{
10 ApiKeyState, AuthenticateError, EnvVar, IconOrSvg, LanguageModel, LanguageModelCompletionError,
11 LanguageModelCompletionEvent, LanguageModelId, LanguageModelName, LanguageModelProvider,
12 LanguageModelProviderId, LanguageModelProviderName, LanguageModelProviderState,
13 LanguageModelRequest, LanguageModelToolChoice, LanguageModelToolResultContent,
14 LanguageModelToolUse, MessageContent, RateLimiter, Role, StopReason, TokenUsage, env_var,
15};
16pub use settings::DeepseekAvailableModel as AvailableModel;
17use settings::{Settings, SettingsStore};
18use std::pin::Pin;
19use std::str::FromStr;
20use std::sync::{Arc, LazyLock};
21
22use ui::{ButtonLink, ConfiguredApiCard, List, ListBulletItem, prelude::*};
23use ui_input::InputField;
24use util::ResultExt;
25
26const PROVIDER_ID: LanguageModelProviderId = LanguageModelProviderId::new("deepseek");
27const PROVIDER_NAME: LanguageModelProviderName = LanguageModelProviderName::new("DeepSeek");
28
29const API_KEY_ENV_VAR_NAME: &str = "DEEPSEEK_API_KEY";
30static API_KEY_ENV_VAR: LazyLock<EnvVar> = env_var!(API_KEY_ENV_VAR_NAME);
31
32#[derive(Default)]
33struct RawToolCall {
34 id: String,
35 name: String,
36 arguments: String,
37}
38
39#[derive(Default, Clone, Debug, PartialEq)]
40pub struct DeepSeekSettings {
41 pub api_url: String,
42 pub available_models: Vec<AvailableModel>,
43}
44pub struct DeepSeekLanguageModelProvider {
45 http_client: Arc<dyn HttpClient>,
46 state: Entity<State>,
47}
48
49pub struct State {
50 api_key_state: ApiKeyState,
51}
52
53impl State {
54 fn is_authenticated(&self) -> bool {
55 self.api_key_state.has_key()
56 }
57
58 fn set_api_key(&mut self, api_key: Option<String>, cx: &mut Context<Self>) -> Task<Result<()>> {
59 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
60 self.api_key_state
61 .store(api_url, api_key, |this| &mut this.api_key_state, cx)
62 }
63
64 fn authenticate(&mut self, cx: &mut Context<Self>) -> Task<Result<(), AuthenticateError>> {
65 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
66 self.api_key_state
67 .load_if_needed(api_url, |this| &mut this.api_key_state, cx)
68 }
69}
70
71impl DeepSeekLanguageModelProvider {
72 pub fn new(http_client: Arc<dyn HttpClient>, cx: &mut App) -> Self {
73 let state = cx.new(|cx| {
74 cx.observe_global::<SettingsStore>(|this: &mut State, cx| {
75 let api_url = Self::api_url(cx);
76 this.api_key_state
77 .handle_url_change(api_url, |this| &mut this.api_key_state, cx);
78 cx.notify();
79 })
80 .detach();
81 State {
82 api_key_state: ApiKeyState::new(Self::api_url(cx), (*API_KEY_ENV_VAR).clone()),
83 }
84 });
85
86 Self { http_client, state }
87 }
88
89 fn create_language_model(&self, model: deepseek::Model) -> Arc<dyn LanguageModel> {
90 Arc::new(DeepSeekLanguageModel {
91 id: LanguageModelId::from(model.id().to_string()),
92 model,
93 state: self.state.clone(),
94 http_client: self.http_client.clone(),
95 request_limiter: RateLimiter::new(4),
96 })
97 }
98
99 fn settings(cx: &App) -> &DeepSeekSettings {
100 &crate::AllLanguageModelSettings::get_global(cx).deepseek
101 }
102
103 fn api_url(cx: &App) -> SharedString {
104 let api_url = &Self::settings(cx).api_url;
105 if api_url.is_empty() {
106 DEEPSEEK_API_URL.into()
107 } else {
108 SharedString::new(api_url.as_str())
109 }
110 }
111}
112
113impl LanguageModelProviderState for DeepSeekLanguageModelProvider {
114 type ObservableEntity = State;
115
116 fn observable_entity(&self) -> Option<Entity<Self::ObservableEntity>> {
117 Some(self.state.clone())
118 }
119}
120
121impl LanguageModelProvider for DeepSeekLanguageModelProvider {
122 fn id(&self) -> LanguageModelProviderId {
123 PROVIDER_ID
124 }
125
126 fn name(&self) -> LanguageModelProviderName {
127 PROVIDER_NAME
128 }
129
130 fn icon(&self) -> IconOrSvg {
131 IconOrSvg::Icon(IconName::AiDeepSeek)
132 }
133
134 fn default_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
135 Some(self.create_language_model(deepseek::Model::default()))
136 }
137
138 fn default_fast_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
139 Some(self.create_language_model(deepseek::Model::default_fast()))
140 }
141
142 fn provided_models(&self, cx: &App) -> Vec<Arc<dyn LanguageModel>> {
143 let mut models = BTreeMap::default();
144
145 models.insert("deepseek-chat", deepseek::Model::Chat);
146 models.insert("deepseek-reasoner", deepseek::Model::Reasoner);
147
148 for available_model in &Self::settings(cx).available_models {
149 models.insert(
150 &available_model.name,
151 deepseek::Model::Custom {
152 name: available_model.name.clone(),
153 display_name: available_model.display_name.clone(),
154 max_tokens: available_model.max_tokens,
155 max_output_tokens: available_model.max_output_tokens,
156 },
157 );
158 }
159
160 models
161 .into_values()
162 .map(|model| self.create_language_model(model))
163 .collect()
164 }
165
166 fn is_authenticated(&self, cx: &App) -> bool {
167 self.state.read(cx).is_authenticated()
168 }
169
170 fn authenticate(&self, cx: &mut App) -> Task<Result<(), AuthenticateError>> {
171 self.state.update(cx, |state, cx| state.authenticate(cx))
172 }
173
174 fn configuration_view(
175 &self,
176 _target_agent: language_model::ConfigurationViewTargetAgent,
177 window: &mut Window,
178 cx: &mut App,
179 ) -> AnyView {
180 cx.new(|cx| ConfigurationView::new(self.state.clone(), window, cx))
181 .into()
182 }
183
184 fn reset_credentials(&self, cx: &mut App) -> Task<Result<()>> {
185 self.state
186 .update(cx, |state, cx| state.set_api_key(None, cx))
187 }
188}
189
190pub struct DeepSeekLanguageModel {
191 id: LanguageModelId,
192 model: deepseek::Model,
193 state: Entity<State>,
194 http_client: Arc<dyn HttpClient>,
195 request_limiter: RateLimiter,
196}
197
198impl DeepSeekLanguageModel {
199 fn stream_completion(
200 &self,
201 request: deepseek::Request,
202 bypass_rate_limit: bool,
203 cx: &AsyncApp,
204 ) -> BoxFuture<'static, Result<BoxStream<'static, Result<deepseek::StreamResponse>>>> {
205 let http_client = self.http_client.clone();
206
207 let (api_key, api_url) = self.state.read_with(cx, |state, cx| {
208 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
209 (state.api_key_state.key(&api_url), api_url)
210 });
211
212 let future = self.request_limiter.stream_with_bypass(
213 async move {
214 let Some(api_key) = api_key else {
215 return Err(LanguageModelCompletionError::NoApiKey {
216 provider: PROVIDER_NAME,
217 });
218 };
219 let request =
220 deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
221 let response = request.await?;
222 Ok(response)
223 },
224 bypass_rate_limit,
225 );
226
227 async move { Ok(future.await?.boxed()) }.boxed()
228 }
229}
230
231impl LanguageModel for DeepSeekLanguageModel {
232 fn id(&self) -> LanguageModelId {
233 self.id.clone()
234 }
235
236 fn name(&self) -> LanguageModelName {
237 LanguageModelName::from(self.model.display_name().to_string())
238 }
239
240 fn provider_id(&self) -> LanguageModelProviderId {
241 PROVIDER_ID
242 }
243
244 fn provider_name(&self) -> LanguageModelProviderName {
245 PROVIDER_NAME
246 }
247
248 fn supports_tools(&self) -> bool {
249 true
250 }
251
252 fn supports_tool_choice(&self, _choice: LanguageModelToolChoice) -> bool {
253 true
254 }
255
256 fn supports_images(&self) -> bool {
257 false
258 }
259
260 fn telemetry_id(&self) -> String {
261 format!("deepseek/{}", self.model.id())
262 }
263
264 fn max_token_count(&self) -> u64 {
265 self.model.max_token_count()
266 }
267
268 fn max_output_tokens(&self) -> Option<u64> {
269 self.model.max_output_tokens()
270 }
271
272 fn count_tokens(
273 &self,
274 request: LanguageModelRequest,
275 cx: &App,
276 ) -> BoxFuture<'static, Result<u64>> {
277 cx.background_spawn(async move {
278 let messages = request
279 .messages
280 .into_iter()
281 .map(|message| tiktoken_rs::ChatCompletionRequestMessage {
282 role: match message.role {
283 Role::User => "user".into(),
284 Role::Assistant => "assistant".into(),
285 Role::System => "system".into(),
286 },
287 content: Some(message.string_contents()),
288 name: None,
289 function_call: None,
290 })
291 .collect::<Vec<_>>();
292
293 tiktoken_rs::num_tokens_from_messages("gpt-4", &messages).map(|tokens| tokens as u64)
294 })
295 .boxed()
296 }
297
298 fn stream_completion(
299 &self,
300 request: LanguageModelRequest,
301 cx: &AsyncApp,
302 ) -> BoxFuture<
303 'static,
304 Result<
305 BoxStream<'static, Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>,
306 LanguageModelCompletionError,
307 >,
308 > {
309 let bypass_rate_limit = request.bypass_rate_limit;
310 let request = into_deepseek(request, &self.model, self.max_output_tokens());
311 let stream = self.stream_completion(request, bypass_rate_limit, cx);
312
313 async move {
314 let mapper = DeepSeekEventMapper::new();
315 Ok(mapper.map_stream(stream.await?).boxed())
316 }
317 .boxed()
318 }
319}
320
321pub fn into_deepseek(
322 request: LanguageModelRequest,
323 model: &deepseek::Model,
324 max_output_tokens: Option<u64>,
325) -> deepseek::Request {
326 let is_reasoner = model == &deepseek::Model::Reasoner;
327
328 let mut messages = Vec::new();
329 let mut current_reasoning: Option<String> = None;
330
331 for message in request.messages {
332 for content in message.content {
333 match content {
334 MessageContent::Text(text) => messages.push(match message.role {
335 Role::User => deepseek::RequestMessage::User { content: text },
336 Role::Assistant => deepseek::RequestMessage::Assistant {
337 content: Some(text),
338 tool_calls: Vec::new(),
339 reasoning_content: current_reasoning.take(),
340 },
341 Role::System => deepseek::RequestMessage::System { content: text },
342 }),
343 MessageContent::Thinking { text, .. } => {
344 // Accumulate reasoning content for next assistant message
345 current_reasoning.get_or_insert_default().push_str(&text);
346 }
347 MessageContent::RedactedThinking(_) => {}
348 MessageContent::Image(_) => {}
349 MessageContent::ToolUse(tool_use) => {
350 let tool_call = deepseek::ToolCall {
351 id: tool_use.id.to_string(),
352 content: deepseek::ToolCallContent::Function {
353 function: deepseek::FunctionContent {
354 name: tool_use.name.to_string(),
355 arguments: serde_json::to_string(&tool_use.input)
356 .unwrap_or_default(),
357 },
358 },
359 };
360
361 if let Some(deepseek::RequestMessage::Assistant { tool_calls, .. }) =
362 messages.last_mut()
363 {
364 tool_calls.push(tool_call);
365 } else {
366 messages.push(deepseek::RequestMessage::Assistant {
367 content: None,
368 tool_calls: vec![tool_call],
369 reasoning_content: current_reasoning.take(),
370 });
371 }
372 }
373 MessageContent::ToolResult(tool_result) => {
374 match &tool_result.content {
375 LanguageModelToolResultContent::Text(text) => {
376 messages.push(deepseek::RequestMessage::Tool {
377 content: text.to_string(),
378 tool_call_id: tool_result.tool_use_id.to_string(),
379 });
380 }
381 LanguageModelToolResultContent::Image(_) => {}
382 };
383 }
384 }
385 }
386 }
387
388 deepseek::Request {
389 model: model.id().to_string(),
390 messages,
391 stream: true,
392 max_tokens: max_output_tokens,
393 temperature: if is_reasoner {
394 None
395 } else {
396 request.temperature
397 },
398 response_format: None,
399 tools: request
400 .tools
401 .into_iter()
402 .map(|tool| deepseek::ToolDefinition::Function {
403 function: deepseek::FunctionDefinition {
404 name: tool.name,
405 description: Some(tool.description),
406 parameters: Some(tool.input_schema),
407 },
408 })
409 .collect(),
410 }
411}
412
413pub struct DeepSeekEventMapper {
414 tool_calls_by_index: HashMap<usize, RawToolCall>,
415}
416
417impl DeepSeekEventMapper {
418 pub fn new() -> Self {
419 Self {
420 tool_calls_by_index: HashMap::default(),
421 }
422 }
423
424 pub fn map_stream(
425 mut self,
426 events: Pin<Box<dyn Send + Stream<Item = Result<deepseek::StreamResponse>>>>,
427 ) -> impl Stream<Item = Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>
428 {
429 events.flat_map(move |event| {
430 futures::stream::iter(match event {
431 Ok(event) => self.map_event(event),
432 Err(error) => vec![Err(LanguageModelCompletionError::from(error))],
433 })
434 })
435 }
436
437 pub fn map_event(
438 &mut self,
439 event: deepseek::StreamResponse,
440 ) -> Vec<Result<LanguageModelCompletionEvent, LanguageModelCompletionError>> {
441 let Some(choice) = event.choices.first() else {
442 return vec![Err(LanguageModelCompletionError::from(anyhow!(
443 "Response contained no choices"
444 )))];
445 };
446
447 let mut events = Vec::new();
448 if let Some(content) = choice.delta.content.clone() {
449 events.push(Ok(LanguageModelCompletionEvent::Text(content)));
450 }
451
452 if let Some(reasoning_content) = choice.delta.reasoning_content.clone() {
453 events.push(Ok(LanguageModelCompletionEvent::Thinking {
454 text: reasoning_content,
455 signature: None,
456 }));
457 }
458
459 if let Some(tool_calls) = choice.delta.tool_calls.as_ref() {
460 for tool_call in tool_calls {
461 let entry = self.tool_calls_by_index.entry(tool_call.index).or_default();
462
463 if let Some(tool_id) = tool_call.id.clone() {
464 entry.id = tool_id;
465 }
466
467 if let Some(function) = tool_call.function.as_ref() {
468 if let Some(name) = function.name.clone() {
469 entry.name = name;
470 }
471
472 if let Some(arguments) = function.arguments.clone() {
473 entry.arguments.push_str(&arguments);
474 }
475 }
476 }
477 }
478
479 if let Some(usage) = event.usage {
480 events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
481 input_tokens: usage.prompt_tokens,
482 output_tokens: usage.completion_tokens,
483 cache_creation_input_tokens: 0,
484 cache_read_input_tokens: 0,
485 })));
486 }
487
488 match choice.finish_reason.as_deref() {
489 Some("stop") => {
490 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
491 }
492 Some("tool_calls") => {
493 events.extend(self.tool_calls_by_index.drain().map(|(_, tool_call)| {
494 match serde_json::Value::from_str(&tool_call.arguments) {
495 Ok(input) => Ok(LanguageModelCompletionEvent::ToolUse(
496 LanguageModelToolUse {
497 id: tool_call.id.clone().into(),
498 name: tool_call.name.as_str().into(),
499 is_input_complete: true,
500 input,
501 raw_input: tool_call.arguments.clone(),
502 thought_signature: None,
503 },
504 )),
505 Err(error) => Ok(LanguageModelCompletionEvent::ToolUseJsonParseError {
506 id: tool_call.id.clone().into(),
507 tool_name: tool_call.name.as_str().into(),
508 raw_input: tool_call.arguments.into(),
509 json_parse_error: error.to_string(),
510 }),
511 }
512 }));
513
514 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::ToolUse)));
515 }
516 Some(stop_reason) => {
517 log::error!("Unexpected DeepSeek stop_reason: {stop_reason:?}",);
518 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
519 }
520 None => {}
521 }
522
523 events
524 }
525}
526
527struct ConfigurationView {
528 api_key_editor: Entity<InputField>,
529 state: Entity<State>,
530 load_credentials_task: Option<Task<()>>,
531}
532
533impl ConfigurationView {
534 fn new(state: Entity<State>, window: &mut Window, cx: &mut Context<Self>) -> Self {
535 let api_key_editor =
536 cx.new(|cx| InputField::new(window, cx, "sk-00000000000000000000000000000000"));
537
538 cx.observe(&state, |_, _, cx| {
539 cx.notify();
540 })
541 .detach();
542
543 let load_credentials_task = Some(cx.spawn({
544 let state = state.clone();
545 async move |this, cx| {
546 if let Some(task) = Some(state.update(cx, |state, cx| state.authenticate(cx))) {
547 let _ = task.await;
548 }
549
550 this.update(cx, |this, cx| {
551 this.load_credentials_task = None;
552 cx.notify();
553 })
554 .log_err();
555 }
556 }));
557
558 Self {
559 api_key_editor,
560 state,
561 load_credentials_task,
562 }
563 }
564
565 fn save_api_key(&mut self, _: &menu::Confirm, _window: &mut Window, cx: &mut Context<Self>) {
566 let api_key = self.api_key_editor.read(cx).text(cx).trim().to_string();
567 if api_key.is_empty() {
568 return;
569 }
570
571 let state = self.state.clone();
572 cx.spawn(async move |_, cx| {
573 state
574 .update(cx, |state, cx| state.set_api_key(Some(api_key), cx))
575 .await
576 })
577 .detach_and_log_err(cx);
578 }
579
580 fn reset_api_key(&mut self, window: &mut Window, cx: &mut Context<Self>) {
581 self.api_key_editor
582 .update(cx, |editor, cx| editor.set_text("", window, cx));
583
584 let state = self.state.clone();
585 cx.spawn(async move |_, cx| {
586 state
587 .update(cx, |state, cx| state.set_api_key(None, cx))
588 .await
589 })
590 .detach_and_log_err(cx);
591 }
592
593 fn should_render_editor(&self, cx: &mut Context<Self>) -> bool {
594 !self.state.read(cx).is_authenticated()
595 }
596}
597
598impl Render for ConfigurationView {
599 fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
600 let env_var_set = self.state.read(cx).api_key_state.is_from_env_var();
601 let configured_card_label = if env_var_set {
602 format!("API key set in {API_KEY_ENV_VAR_NAME} environment variable")
603 } else {
604 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
605 if api_url == DEEPSEEK_API_URL {
606 "API key configured".to_string()
607 } else {
608 format!("API key configured for {}", api_url)
609 }
610 };
611
612 if self.load_credentials_task.is_some() {
613 div()
614 .child(Label::new("Loading credentials..."))
615 .into_any_element()
616 } else if self.should_render_editor(cx) {
617 v_flex()
618 .size_full()
619 .on_action(cx.listener(Self::save_api_key))
620 .child(Label::new("To use DeepSeek in Zed, you need an API key:"))
621 .child(
622 List::new()
623 .child(
624 ListBulletItem::new("")
625 .child(Label::new("Get your API key from the"))
626 .child(ButtonLink::new(
627 "DeepSeek console",
628 "https://platform.deepseek.com/api_keys",
629 )),
630 )
631 .child(ListBulletItem::new(
632 "Paste your API key below and hit enter to start using the assistant",
633 )),
634 )
635 .child(self.api_key_editor.clone())
636 .child(
637 Label::new(format!(
638 "You can also set the {API_KEY_ENV_VAR_NAME} environment variable and restart Zed."
639 ))
640 .size(LabelSize::Small)
641 .color(Color::Muted),
642 )
643 .into_any_element()
644 } else {
645 ConfiguredApiCard::new(configured_card_label)
646 .disabled(env_var_set)
647 .on_click(cx.listener(|this, _, window, cx| this.reset_api_key(window, cx)))
648 .into_any_element()
649 }
650 }
651}