1use anyhow::{Context as _, Result, anyhow};
2use collections::{BTreeMap, HashMap};
3use credentials_provider::CredentialsProvider;
4use editor::{Editor, EditorElement, EditorStyle};
5use futures::Stream;
6use futures::{FutureExt, StreamExt, future::BoxFuture, stream::BoxStream};
7use gpui::{
8 AnyView, AppContext as _, AsyncApp, Entity, FontStyle, Subscription, Task, TextStyle,
9 WhiteSpace,
10};
11use http_client::HttpClient;
12use language_model::{
13 AuthenticateError, LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent,
14 LanguageModelId, LanguageModelName, LanguageModelProvider, LanguageModelProviderId,
15 LanguageModelProviderName, LanguageModelProviderState, LanguageModelRequest,
16 LanguageModelToolChoice, LanguageModelToolResultContent, LanguageModelToolUse, MessageContent,
17 RateLimiter, Role, StopReason, TokenUsage,
18};
19pub use settings::DeepseekAvailableModel as AvailableModel;
20use settings::{Settings, SettingsStore};
21use std::pin::Pin;
22use std::str::FromStr;
23use std::sync::Arc;
24use theme::ThemeSettings;
25use ui::{Icon, IconName, List, prelude::*};
26use util::ResultExt;
27
28use crate::{AllLanguageModelSettings, ui::InstructionListItem};
29
30const PROVIDER_ID: LanguageModelProviderId = LanguageModelProviderId::new("deepseek");
31const PROVIDER_NAME: LanguageModelProviderName = LanguageModelProviderName::new("DeepSeek");
32const DEEPSEEK_API_KEY_VAR: &str = "DEEPSEEK_API_KEY";
33
34#[derive(Default)]
35struct RawToolCall {
36 id: String,
37 name: String,
38 arguments: String,
39}
40
41#[derive(Default, Clone, Debug, PartialEq)]
42pub struct DeepSeekSettings {
43 pub api_url: String,
44 pub available_models: Vec<AvailableModel>,
45}
46pub struct DeepSeekLanguageModelProvider {
47 http_client: Arc<dyn HttpClient>,
48 state: Entity<State>,
49}
50
51pub struct State {
52 api_key: Option<String>,
53 api_key_from_env: bool,
54 _subscription: Subscription,
55}
56
57impl State {
58 fn is_authenticated(&self) -> bool {
59 self.api_key.is_some()
60 }
61
62 fn reset_api_key(&self, cx: &mut Context<Self>) -> Task<Result<()>> {
63 let credentials_provider = <dyn CredentialsProvider>::global(cx);
64 let api_url = AllLanguageModelSettings::get_global(cx)
65 .deepseek
66 .api_url
67 .clone();
68 cx.spawn(async move |this, cx| {
69 credentials_provider
70 .delete_credentials(&api_url, cx)
71 .await
72 .log_err();
73 this.update(cx, |this, cx| {
74 this.api_key = None;
75 this.api_key_from_env = false;
76 cx.notify();
77 })
78 })
79 }
80
81 fn set_api_key(&mut self, api_key: String, cx: &mut Context<Self>) -> Task<Result<()>> {
82 let credentials_provider = <dyn CredentialsProvider>::global(cx);
83 let api_url = AllLanguageModelSettings::get_global(cx)
84 .deepseek
85 .api_url
86 .clone();
87 cx.spawn(async move |this, cx| {
88 credentials_provider
89 .write_credentials(&api_url, "Bearer", api_key.as_bytes(), cx)
90 .await?;
91 this.update(cx, |this, cx| {
92 this.api_key = Some(api_key);
93 cx.notify();
94 })
95 })
96 }
97
98 fn authenticate(&self, cx: &mut Context<Self>) -> Task<Result<(), AuthenticateError>> {
99 if self.is_authenticated() {
100 return Task::ready(Ok(()));
101 }
102
103 let credentials_provider = <dyn CredentialsProvider>::global(cx);
104 let api_url = AllLanguageModelSettings::get_global(cx)
105 .deepseek
106 .api_url
107 .clone();
108 cx.spawn(async move |this, cx| {
109 let (api_key, from_env) = if let Ok(api_key) = std::env::var(DEEPSEEK_API_KEY_VAR) {
110 (api_key, true)
111 } else {
112 let (_, api_key) = credentials_provider
113 .read_credentials(&api_url, cx)
114 .await?
115 .ok_or(AuthenticateError::CredentialsNotFound)?;
116 (
117 String::from_utf8(api_key).context("invalid {PROVIDER_NAME} API key")?,
118 false,
119 )
120 };
121
122 this.update(cx, |this, cx| {
123 this.api_key = Some(api_key);
124 this.api_key_from_env = from_env;
125 cx.notify();
126 })?;
127
128 Ok(())
129 })
130 }
131}
132
133impl DeepSeekLanguageModelProvider {
134 pub fn new(http_client: Arc<dyn HttpClient>, cx: &mut App) -> Self {
135 let state = cx.new(|cx| State {
136 api_key: None,
137 api_key_from_env: false,
138 _subscription: cx.observe_global::<SettingsStore>(|_this: &mut State, cx| {
139 cx.notify();
140 }),
141 });
142
143 Self { http_client, state }
144 }
145
146 fn create_language_model(&self, model: deepseek::Model) -> Arc<dyn LanguageModel> {
147 Arc::new(DeepSeekLanguageModel {
148 id: LanguageModelId::from(model.id().to_string()),
149 model,
150 state: self.state.clone(),
151 http_client: self.http_client.clone(),
152 request_limiter: RateLimiter::new(4),
153 }) as Arc<dyn LanguageModel>
154 }
155}
156
157impl LanguageModelProviderState for DeepSeekLanguageModelProvider {
158 type ObservableEntity = State;
159
160 fn observable_entity(&self) -> Option<Entity<Self::ObservableEntity>> {
161 Some(self.state.clone())
162 }
163}
164
165impl LanguageModelProvider for DeepSeekLanguageModelProvider {
166 fn id(&self) -> LanguageModelProviderId {
167 PROVIDER_ID
168 }
169
170 fn name(&self) -> LanguageModelProviderName {
171 PROVIDER_NAME
172 }
173
174 fn icon(&self) -> IconName {
175 IconName::AiDeepSeek
176 }
177
178 fn default_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
179 Some(self.create_language_model(deepseek::Model::default()))
180 }
181
182 fn default_fast_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
183 Some(self.create_language_model(deepseek::Model::default_fast()))
184 }
185
186 fn provided_models(&self, cx: &App) -> Vec<Arc<dyn LanguageModel>> {
187 let mut models = BTreeMap::default();
188
189 models.insert("deepseek-chat", deepseek::Model::Chat);
190 models.insert("deepseek-reasoner", deepseek::Model::Reasoner);
191
192 for available_model in AllLanguageModelSettings::get_global(cx)
193 .deepseek
194 .available_models
195 .iter()
196 {
197 models.insert(
198 &available_model.name,
199 deepseek::Model::Custom {
200 name: available_model.name.clone(),
201 display_name: available_model.display_name.clone(),
202 max_tokens: available_model.max_tokens,
203 max_output_tokens: available_model.max_output_tokens,
204 },
205 );
206 }
207
208 models
209 .into_values()
210 .map(|model| self.create_language_model(model))
211 .collect()
212 }
213
214 fn is_authenticated(&self, cx: &App) -> bool {
215 self.state.read(cx).is_authenticated()
216 }
217
218 fn authenticate(&self, cx: &mut App) -> Task<Result<(), AuthenticateError>> {
219 self.state.update(cx, |state, cx| state.authenticate(cx))
220 }
221
222 fn configuration_view(
223 &self,
224 _target_agent: language_model::ConfigurationViewTargetAgent,
225 window: &mut Window,
226 cx: &mut App,
227 ) -> AnyView {
228 cx.new(|cx| ConfigurationView::new(self.state.clone(), window, cx))
229 .into()
230 }
231
232 fn reset_credentials(&self, cx: &mut App) -> Task<Result<()>> {
233 self.state.update(cx, |state, cx| state.reset_api_key(cx))
234 }
235}
236
237pub struct DeepSeekLanguageModel {
238 id: LanguageModelId,
239 model: deepseek::Model,
240 state: Entity<State>,
241 http_client: Arc<dyn HttpClient>,
242 request_limiter: RateLimiter,
243}
244
245impl DeepSeekLanguageModel {
246 fn stream_completion(
247 &self,
248 request: deepseek::Request,
249 cx: &AsyncApp,
250 ) -> BoxFuture<'static, Result<BoxStream<'static, Result<deepseek::StreamResponse>>>> {
251 let http_client = self.http_client.clone();
252 let Ok((api_key, api_url)) = cx.read_entity(&self.state, |state, cx| {
253 let settings = &AllLanguageModelSettings::get_global(cx).deepseek;
254 (state.api_key.clone(), settings.api_url.clone())
255 }) else {
256 return futures::future::ready(Err(anyhow!("App state dropped"))).boxed();
257 };
258
259 let future = self.request_limiter.stream(async move {
260 let api_key = api_key.context("Missing DeepSeek API Key")?;
261 let request =
262 deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
263 let response = request.await?;
264 Ok(response)
265 });
266
267 async move { Ok(future.await?.boxed()) }.boxed()
268 }
269}
270
271impl LanguageModel for DeepSeekLanguageModel {
272 fn id(&self) -> LanguageModelId {
273 self.id.clone()
274 }
275
276 fn name(&self) -> LanguageModelName {
277 LanguageModelName::from(self.model.display_name().to_string())
278 }
279
280 fn provider_id(&self) -> LanguageModelProviderId {
281 PROVIDER_ID
282 }
283
284 fn provider_name(&self) -> LanguageModelProviderName {
285 PROVIDER_NAME
286 }
287
288 fn supports_tools(&self) -> bool {
289 true
290 }
291
292 fn supports_tool_choice(&self, _choice: LanguageModelToolChoice) -> bool {
293 true
294 }
295
296 fn supports_images(&self) -> bool {
297 false
298 }
299
300 fn telemetry_id(&self) -> String {
301 format!("deepseek/{}", self.model.id())
302 }
303
304 fn max_token_count(&self) -> u64 {
305 self.model.max_token_count()
306 }
307
308 fn max_output_tokens(&self) -> Option<u64> {
309 self.model.max_output_tokens()
310 }
311
312 fn count_tokens(
313 &self,
314 request: LanguageModelRequest,
315 cx: &App,
316 ) -> BoxFuture<'static, Result<u64>> {
317 cx.background_spawn(async move {
318 let messages = request
319 .messages
320 .into_iter()
321 .map(|message| tiktoken_rs::ChatCompletionRequestMessage {
322 role: match message.role {
323 Role::User => "user".into(),
324 Role::Assistant => "assistant".into(),
325 Role::System => "system".into(),
326 },
327 content: Some(message.string_contents()),
328 name: None,
329 function_call: None,
330 })
331 .collect::<Vec<_>>();
332
333 tiktoken_rs::num_tokens_from_messages("gpt-4", &messages).map(|tokens| tokens as u64)
334 })
335 .boxed()
336 }
337
338 fn stream_completion(
339 &self,
340 request: LanguageModelRequest,
341 cx: &AsyncApp,
342 ) -> BoxFuture<
343 'static,
344 Result<
345 BoxStream<'static, Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>,
346 LanguageModelCompletionError,
347 >,
348 > {
349 let request = into_deepseek(request, &self.model, self.max_output_tokens());
350 let stream = self.stream_completion(request, cx);
351
352 async move {
353 let mapper = DeepSeekEventMapper::new();
354 Ok(mapper.map_stream(stream.await?).boxed())
355 }
356 .boxed()
357 }
358}
359
360pub fn into_deepseek(
361 request: LanguageModelRequest,
362 model: &deepseek::Model,
363 max_output_tokens: Option<u64>,
364) -> deepseek::Request {
365 let is_reasoner = *model == deepseek::Model::Reasoner;
366
367 let mut messages = Vec::new();
368 for message in request.messages {
369 for content in message.content {
370 match content {
371 MessageContent::Text(text) => messages.push(match message.role {
372 Role::User => deepseek::RequestMessage::User { content: text },
373 Role::Assistant => deepseek::RequestMessage::Assistant {
374 content: Some(text),
375 tool_calls: Vec::new(),
376 },
377 Role::System => deepseek::RequestMessage::System { content: text },
378 }),
379 MessageContent::Thinking { .. } => {}
380 MessageContent::RedactedThinking(_) => {}
381 MessageContent::Image(_) => {}
382 MessageContent::ToolUse(tool_use) => {
383 let tool_call = deepseek::ToolCall {
384 id: tool_use.id.to_string(),
385 content: deepseek::ToolCallContent::Function {
386 function: deepseek::FunctionContent {
387 name: tool_use.name.to_string(),
388 arguments: serde_json::to_string(&tool_use.input)
389 .unwrap_or_default(),
390 },
391 },
392 };
393
394 if let Some(deepseek::RequestMessage::Assistant { tool_calls, .. }) =
395 messages.last_mut()
396 {
397 tool_calls.push(tool_call);
398 } else {
399 messages.push(deepseek::RequestMessage::Assistant {
400 content: None,
401 tool_calls: vec![tool_call],
402 });
403 }
404 }
405 MessageContent::ToolResult(tool_result) => {
406 match &tool_result.content {
407 LanguageModelToolResultContent::Text(text) => {
408 messages.push(deepseek::RequestMessage::Tool {
409 content: text.to_string(),
410 tool_call_id: tool_result.tool_use_id.to_string(),
411 });
412 }
413 LanguageModelToolResultContent::Image(_) => {}
414 };
415 }
416 }
417 }
418 }
419
420 deepseek::Request {
421 model: model.id().to_string(),
422 messages,
423 stream: true,
424 max_tokens: max_output_tokens,
425 temperature: if is_reasoner {
426 None
427 } else {
428 request.temperature
429 },
430 response_format: None,
431 tools: request
432 .tools
433 .into_iter()
434 .map(|tool| deepseek::ToolDefinition::Function {
435 function: deepseek::FunctionDefinition {
436 name: tool.name,
437 description: Some(tool.description),
438 parameters: Some(tool.input_schema),
439 },
440 })
441 .collect(),
442 }
443}
444
445pub struct DeepSeekEventMapper {
446 tool_calls_by_index: HashMap<usize, RawToolCall>,
447}
448
449impl DeepSeekEventMapper {
450 pub fn new() -> Self {
451 Self {
452 tool_calls_by_index: HashMap::default(),
453 }
454 }
455
456 pub fn map_stream(
457 mut self,
458 events: Pin<Box<dyn Send + Stream<Item = Result<deepseek::StreamResponse>>>>,
459 ) -> impl Stream<Item = Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>
460 {
461 events.flat_map(move |event| {
462 futures::stream::iter(match event {
463 Ok(event) => self.map_event(event),
464 Err(error) => vec![Err(LanguageModelCompletionError::from(error))],
465 })
466 })
467 }
468
469 pub fn map_event(
470 &mut self,
471 event: deepseek::StreamResponse,
472 ) -> Vec<Result<LanguageModelCompletionEvent, LanguageModelCompletionError>> {
473 let Some(choice) = event.choices.first() else {
474 return vec![Err(LanguageModelCompletionError::from(anyhow!(
475 "Response contained no choices"
476 )))];
477 };
478
479 let mut events = Vec::new();
480 if let Some(content) = choice.delta.content.clone() {
481 events.push(Ok(LanguageModelCompletionEvent::Text(content)));
482 }
483
484 if let Some(reasoning_content) = choice.delta.reasoning_content.clone() {
485 events.push(Ok(LanguageModelCompletionEvent::Thinking {
486 text: reasoning_content,
487 signature: None,
488 }));
489 }
490
491 if let Some(tool_calls) = choice.delta.tool_calls.as_ref() {
492 for tool_call in tool_calls {
493 let entry = self.tool_calls_by_index.entry(tool_call.index).or_default();
494
495 if let Some(tool_id) = tool_call.id.clone() {
496 entry.id = tool_id;
497 }
498
499 if let Some(function) = tool_call.function.as_ref() {
500 if let Some(name) = function.name.clone() {
501 entry.name = name;
502 }
503
504 if let Some(arguments) = function.arguments.clone() {
505 entry.arguments.push_str(&arguments);
506 }
507 }
508 }
509 }
510
511 if let Some(usage) = event.usage {
512 events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
513 input_tokens: usage.prompt_tokens,
514 output_tokens: usage.completion_tokens,
515 cache_creation_input_tokens: 0,
516 cache_read_input_tokens: 0,
517 })));
518 }
519
520 match choice.finish_reason.as_deref() {
521 Some("stop") => {
522 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
523 }
524 Some("tool_calls") => {
525 events.extend(self.tool_calls_by_index.drain().map(|(_, tool_call)| {
526 match serde_json::Value::from_str(&tool_call.arguments) {
527 Ok(input) => Ok(LanguageModelCompletionEvent::ToolUse(
528 LanguageModelToolUse {
529 id: tool_call.id.clone().into(),
530 name: tool_call.name.as_str().into(),
531 is_input_complete: true,
532 input,
533 raw_input: tool_call.arguments.clone(),
534 },
535 )),
536 Err(error) => Ok(LanguageModelCompletionEvent::ToolUseJsonParseError {
537 id: tool_call.id.clone().into(),
538 tool_name: tool_call.name.as_str().into(),
539 raw_input: tool_call.arguments.into(),
540 json_parse_error: error.to_string(),
541 }),
542 }
543 }));
544
545 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::ToolUse)));
546 }
547 Some(stop_reason) => {
548 log::error!("Unexpected DeepSeek stop_reason: {stop_reason:?}",);
549 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
550 }
551 None => {}
552 }
553
554 events
555 }
556}
557
558struct ConfigurationView {
559 api_key_editor: Entity<Editor>,
560 state: Entity<State>,
561 load_credentials_task: Option<Task<()>>,
562}
563
564impl ConfigurationView {
565 fn new(state: Entity<State>, window: &mut Window, cx: &mut Context<Self>) -> Self {
566 let api_key_editor = cx.new(|cx| {
567 let mut editor = Editor::single_line(window, cx);
568 editor.set_placeholder_text("sk-00000000000000000000000000000000", window, cx);
569 editor
570 });
571
572 cx.observe(&state, |_, _, cx| {
573 cx.notify();
574 })
575 .detach();
576
577 let load_credentials_task = Some(cx.spawn({
578 let state = state.clone();
579 async move |this, cx| {
580 if let Some(task) = state
581 .update(cx, |state, cx| state.authenticate(cx))
582 .log_err()
583 {
584 let _ = task.await;
585 }
586
587 this.update(cx, |this, cx| {
588 this.load_credentials_task = None;
589 cx.notify();
590 })
591 .log_err();
592 }
593 }));
594
595 Self {
596 api_key_editor,
597 state,
598 load_credentials_task,
599 }
600 }
601
602 fn save_api_key(&mut self, _: &menu::Confirm, _window: &mut Window, cx: &mut Context<Self>) {
603 let api_key = self.api_key_editor.read(cx).text(cx);
604 if api_key.is_empty() {
605 return;
606 }
607
608 let state = self.state.clone();
609 cx.spawn(async move |_, cx| {
610 state
611 .update(cx, |state, cx| state.set_api_key(api_key, cx))?
612 .await
613 })
614 .detach_and_log_err(cx);
615
616 cx.notify();
617 }
618
619 fn reset_api_key(&mut self, window: &mut Window, cx: &mut Context<Self>) {
620 self.api_key_editor
621 .update(cx, |editor, cx| editor.set_text("", window, cx));
622
623 let state = self.state.clone();
624 cx.spawn(async move |_, cx| state.update(cx, |state, cx| state.reset_api_key(cx))?.await)
625 .detach_and_log_err(cx);
626
627 cx.notify();
628 }
629
630 fn render_api_key_editor(&self, cx: &mut Context<Self>) -> impl IntoElement {
631 let settings = ThemeSettings::get_global(cx);
632 let text_style = TextStyle {
633 color: cx.theme().colors().text,
634 font_family: settings.ui_font.family.clone(),
635 font_features: settings.ui_font.features.clone(),
636 font_fallbacks: settings.ui_font.fallbacks.clone(),
637 font_size: rems(0.875).into(),
638 font_weight: settings.ui_font.weight,
639 font_style: FontStyle::Normal,
640 line_height: relative(1.3),
641 background_color: None,
642 underline: None,
643 strikethrough: None,
644 white_space: WhiteSpace::Normal,
645 ..Default::default()
646 };
647 EditorElement::new(
648 &self.api_key_editor,
649 EditorStyle {
650 background: cx.theme().colors().editor_background,
651 local_player: cx.theme().players().local(),
652 text: text_style,
653 ..Default::default()
654 },
655 )
656 }
657
658 fn should_render_editor(&self, cx: &mut Context<Self>) -> bool {
659 !self.state.read(cx).is_authenticated()
660 }
661}
662
663impl Render for ConfigurationView {
664 fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
665 let env_var_set = self.state.read(cx).api_key_from_env;
666
667 if self.load_credentials_task.is_some() {
668 div().child(Label::new("Loading credentials...")).into_any()
669 } else if self.should_render_editor(cx) {
670 v_flex()
671 .size_full()
672 .on_action(cx.listener(Self::save_api_key))
673 .child(Label::new("To use DeepSeek in Zed, you need an API key:"))
674 .child(
675 List::new()
676 .child(InstructionListItem::new(
677 "Get your API key from the",
678 Some("DeepSeek console"),
679 Some("https://platform.deepseek.com/api_keys"),
680 ))
681 .child(InstructionListItem::text_only(
682 "Paste your API key below and hit enter to start using the assistant",
683 )),
684 )
685 .child(
686 h_flex()
687 .w_full()
688 .my_2()
689 .px_2()
690 .py_1()
691 .bg(cx.theme().colors().editor_background)
692 .border_1()
693 .border_color(cx.theme().colors().border)
694 .rounded_sm()
695 .child(self.render_api_key_editor(cx)),
696 )
697 .child(
698 Label::new(format!(
699 "Or set the {} environment variable.",
700 DEEPSEEK_API_KEY_VAR
701 ))
702 .size(LabelSize::Small)
703 .color(Color::Muted),
704 )
705 .into_any()
706 } else {
707 h_flex()
708 .mt_1()
709 .p_1()
710 .justify_between()
711 .rounded_md()
712 .border_1()
713 .border_color(cx.theme().colors().border)
714 .bg(cx.theme().colors().background)
715 .child(
716 h_flex()
717 .gap_1()
718 .child(Icon::new(IconName::Check).color(Color::Success))
719 .child(Label::new(if env_var_set {
720 format!("API key set in {}", DEEPSEEK_API_KEY_VAR)
721 } else {
722 "API key configured".to_string()
723 })),
724 )
725 .child(
726 Button::new("reset-key", "Reset Key")
727 .label_size(LabelSize::Small)
728 .icon(Some(IconName::Trash))
729 .icon_size(IconSize::Small)
730 .icon_position(IconPosition::Start)
731 .disabled(env_var_set)
732 .on_click(
733 cx.listener(|this, _, window, cx| this.reset_api_key(window, cx)),
734 ),
735 )
736 .into_any()
737 }
738 }
739}