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};
19use schemars::JsonSchema;
20use serde::{Deserialize, Serialize};
21use settings::{Settings, SettingsStore};
22use std::pin::Pin;
23use std::str::FromStr;
24use std::sync::Arc;
25use theme::ThemeSettings;
26use ui::{Icon, IconName, List, prelude::*};
27use util::ResultExt;
28
29use crate::{AllLanguageModelSettings, ui::InstructionListItem};
30
31const PROVIDER_ID: LanguageModelProviderId = LanguageModelProviderId::new("deepseek");
32const PROVIDER_NAME: LanguageModelProviderName = LanguageModelProviderName::new("DeepSeek");
33const DEEPSEEK_API_KEY_VAR: &str = "DEEPSEEK_API_KEY";
34
35#[derive(Default)]
36struct RawToolCall {
37 id: String,
38 name: String,
39 arguments: String,
40}
41
42#[derive(Default, Clone, Debug, PartialEq)]
43pub struct DeepSeekSettings {
44 pub api_url: String,
45 pub available_models: Vec<AvailableModel>,
46}
47
48#[derive(Clone, Debug, PartialEq, Serialize, Deserialize, JsonSchema)]
49pub struct AvailableModel {
50 pub name: String,
51 pub display_name: Option<String>,
52 pub max_tokens: u64,
53 pub max_output_tokens: Option<u64>,
54}
55
56pub struct DeepSeekLanguageModelProvider {
57 http_client: Arc<dyn HttpClient>,
58 state: Entity<State>,
59}
60
61pub struct State {
62 api_key: Option<String>,
63 api_key_from_env: bool,
64 _subscription: Subscription,
65}
66
67impl State {
68 fn is_authenticated(&self) -> bool {
69 self.api_key.is_some()
70 }
71
72 fn reset_api_key(&self, cx: &mut Context<Self>) -> Task<Result<()>> {
73 let credentials_provider = <dyn CredentialsProvider>::global(cx);
74 let api_url = AllLanguageModelSettings::get_global(cx)
75 .deepseek
76 .api_url
77 .clone();
78 cx.spawn(async move |this, cx| {
79 credentials_provider
80 .delete_credentials(&api_url, cx)
81 .await
82 .log_err();
83 this.update(cx, |this, cx| {
84 this.api_key = None;
85 this.api_key_from_env = false;
86 cx.notify();
87 })
88 })
89 }
90
91 fn set_api_key(&mut self, api_key: String, cx: &mut Context<Self>) -> Task<Result<()>> {
92 let credentials_provider = <dyn CredentialsProvider>::global(cx);
93 let api_url = AllLanguageModelSettings::get_global(cx)
94 .deepseek
95 .api_url
96 .clone();
97 cx.spawn(async move |this, cx| {
98 credentials_provider
99 .write_credentials(&api_url, "Bearer", api_key.as_bytes(), cx)
100 .await?;
101 this.update(cx, |this, cx| {
102 this.api_key = Some(api_key);
103 cx.notify();
104 })
105 })
106 }
107
108 fn authenticate(&self, cx: &mut Context<Self>) -> Task<Result<(), AuthenticateError>> {
109 if self.is_authenticated() {
110 return Task::ready(Ok(()));
111 }
112
113 let credentials_provider = <dyn CredentialsProvider>::global(cx);
114 let api_url = AllLanguageModelSettings::get_global(cx)
115 .deepseek
116 .api_url
117 .clone();
118 cx.spawn(async move |this, cx| {
119 let (api_key, from_env) = if let Ok(api_key) = std::env::var(DEEPSEEK_API_KEY_VAR) {
120 (api_key, true)
121 } else {
122 let (_, api_key) = credentials_provider
123 .read_credentials(&api_url, cx)
124 .await?
125 .ok_or(AuthenticateError::CredentialsNotFound)?;
126 (
127 String::from_utf8(api_key).context("invalid {PROVIDER_NAME} API key")?,
128 false,
129 )
130 };
131
132 this.update(cx, |this, cx| {
133 this.api_key = Some(api_key);
134 this.api_key_from_env = from_env;
135 cx.notify();
136 })?;
137
138 Ok(())
139 })
140 }
141}
142
143impl DeepSeekLanguageModelProvider {
144 pub fn new(http_client: Arc<dyn HttpClient>, cx: &mut App) -> Self {
145 let state = cx.new(|cx| State {
146 api_key: None,
147 api_key_from_env: false,
148 _subscription: cx.observe_global::<SettingsStore>(|_this: &mut State, cx| {
149 cx.notify();
150 }),
151 });
152
153 Self { http_client, state }
154 }
155
156 fn create_language_model(&self, model: deepseek::Model) -> Arc<dyn LanguageModel> {
157 Arc::new(DeepSeekLanguageModel {
158 id: LanguageModelId::from(model.id().to_string()),
159 model,
160 state: self.state.clone(),
161 http_client: self.http_client.clone(),
162 request_limiter: RateLimiter::new(4),
163 }) as Arc<dyn LanguageModel>
164 }
165}
166
167impl LanguageModelProviderState for DeepSeekLanguageModelProvider {
168 type ObservableEntity = State;
169
170 fn observable_entity(&self) -> Option<Entity<Self::ObservableEntity>> {
171 Some(self.state.clone())
172 }
173}
174
175impl LanguageModelProvider for DeepSeekLanguageModelProvider {
176 fn id(&self) -> LanguageModelProviderId {
177 PROVIDER_ID
178 }
179
180 fn name(&self) -> LanguageModelProviderName {
181 PROVIDER_NAME
182 }
183
184 fn icon(&self) -> IconName {
185 IconName::AiDeepSeek
186 }
187
188 fn default_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
189 Some(self.create_language_model(deepseek::Model::default()))
190 }
191
192 fn default_fast_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
193 Some(self.create_language_model(deepseek::Model::default_fast()))
194 }
195
196 fn provided_models(&self, cx: &App) -> Vec<Arc<dyn LanguageModel>> {
197 let mut models = BTreeMap::default();
198
199 models.insert("deepseek-chat", deepseek::Model::Chat);
200 models.insert("deepseek-reasoner", deepseek::Model::Reasoner);
201
202 for available_model in AllLanguageModelSettings::get_global(cx)
203 .deepseek
204 .available_models
205 .iter()
206 {
207 models.insert(
208 &available_model.name,
209 deepseek::Model::Custom {
210 name: available_model.name.clone(),
211 display_name: available_model.display_name.clone(),
212 max_tokens: available_model.max_tokens,
213 max_output_tokens: available_model.max_output_tokens,
214 },
215 );
216 }
217
218 models
219 .into_values()
220 .map(|model| self.create_language_model(model))
221 .collect()
222 }
223
224 fn is_authenticated(&self, cx: &App) -> bool {
225 self.state.read(cx).is_authenticated()
226 }
227
228 fn authenticate(&self, cx: &mut App) -> Task<Result<(), AuthenticateError>> {
229 self.state.update(cx, |state, cx| state.authenticate(cx))
230 }
231
232 fn configuration_view(
233 &self,
234 _target_agent: language_model::ConfigurationViewTargetAgent,
235 window: &mut Window,
236 cx: &mut App,
237 ) -> AnyView {
238 cx.new(|cx| ConfigurationView::new(self.state.clone(), window, cx))
239 .into()
240 }
241
242 fn reset_credentials(&self, cx: &mut App) -> Task<Result<()>> {
243 self.state.update(cx, |state, cx| state.reset_api_key(cx))
244 }
245}
246
247pub struct DeepSeekLanguageModel {
248 id: LanguageModelId,
249 model: deepseek::Model,
250 state: Entity<State>,
251 http_client: Arc<dyn HttpClient>,
252 request_limiter: RateLimiter,
253}
254
255impl DeepSeekLanguageModel {
256 fn stream_completion(
257 &self,
258 request: deepseek::Request,
259 cx: &AsyncApp,
260 ) -> BoxFuture<'static, Result<BoxStream<'static, Result<deepseek::StreamResponse>>>> {
261 let http_client = self.http_client.clone();
262 let Ok((api_key, api_url)) = cx.read_entity(&self.state, |state, cx| {
263 let settings = &AllLanguageModelSettings::get_global(cx).deepseek;
264 (state.api_key.clone(), settings.api_url.clone())
265 }) else {
266 return futures::future::ready(Err(anyhow!("App state dropped"))).boxed();
267 };
268
269 let future = self.request_limiter.stream(async move {
270 let api_key = api_key.context("Missing DeepSeek API Key")?;
271 let request =
272 deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
273 let response = request.await?;
274 Ok(response)
275 });
276
277 async move { Ok(future.await?.boxed()) }.boxed()
278 }
279}
280
281impl LanguageModel for DeepSeekLanguageModel {
282 fn id(&self) -> LanguageModelId {
283 self.id.clone()
284 }
285
286 fn name(&self) -> LanguageModelName {
287 LanguageModelName::from(self.model.display_name().to_string())
288 }
289
290 fn provider_id(&self) -> LanguageModelProviderId {
291 PROVIDER_ID
292 }
293
294 fn provider_name(&self) -> LanguageModelProviderName {
295 PROVIDER_NAME
296 }
297
298 fn supports_tools(&self) -> bool {
299 true
300 }
301
302 fn supports_tool_choice(&self, _choice: LanguageModelToolChoice) -> bool {
303 true
304 }
305
306 fn supports_images(&self) -> bool {
307 false
308 }
309
310 fn telemetry_id(&self) -> String {
311 format!("deepseek/{}", self.model.id())
312 }
313
314 fn max_token_count(&self) -> u64 {
315 self.model.max_token_count()
316 }
317
318 fn max_output_tokens(&self) -> Option<u64> {
319 self.model.max_output_tokens()
320 }
321
322 fn count_tokens(
323 &self,
324 request: LanguageModelRequest,
325 cx: &App,
326 ) -> BoxFuture<'static, Result<u64>> {
327 cx.background_spawn(async move {
328 let messages = request
329 .messages
330 .into_iter()
331 .map(|message| tiktoken_rs::ChatCompletionRequestMessage {
332 role: match message.role {
333 Role::User => "user".into(),
334 Role::Assistant => "assistant".into(),
335 Role::System => "system".into(),
336 },
337 content: Some(message.string_contents()),
338 name: None,
339 function_call: None,
340 })
341 .collect::<Vec<_>>();
342
343 tiktoken_rs::num_tokens_from_messages("gpt-4", &messages).map(|tokens| tokens as u64)
344 })
345 .boxed()
346 }
347
348 fn stream_completion(
349 &self,
350 request: LanguageModelRequest,
351 cx: &AsyncApp,
352 ) -> BoxFuture<
353 'static,
354 Result<
355 BoxStream<'static, Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>,
356 LanguageModelCompletionError,
357 >,
358 > {
359 let request = into_deepseek(request, &self.model, self.max_output_tokens());
360 let stream = self.stream_completion(request, cx);
361
362 async move {
363 let mapper = DeepSeekEventMapper::new();
364 Ok(mapper.map_stream(stream.await?).boxed())
365 }
366 .boxed()
367 }
368}
369
370pub fn into_deepseek(
371 request: LanguageModelRequest,
372 model: &deepseek::Model,
373 max_output_tokens: Option<u64>,
374) -> deepseek::Request {
375 let is_reasoner = *model == deepseek::Model::Reasoner;
376
377 let mut messages = Vec::new();
378 for message in request.messages {
379 for content in message.content {
380 match content {
381 MessageContent::Text(text) => messages.push(match message.role {
382 Role::User => deepseek::RequestMessage::User { content: text },
383 Role::Assistant => deepseek::RequestMessage::Assistant {
384 content: Some(text),
385 tool_calls: Vec::new(),
386 },
387 Role::System => deepseek::RequestMessage::System { content: text },
388 }),
389 MessageContent::Thinking { .. } => {}
390 MessageContent::RedactedThinking(_) => {}
391 MessageContent::Image(_) => {}
392 MessageContent::ToolUse(tool_use) => {
393 let tool_call = deepseek::ToolCall {
394 id: tool_use.id.to_string(),
395 content: deepseek::ToolCallContent::Function {
396 function: deepseek::FunctionContent {
397 name: tool_use.name.to_string(),
398 arguments: serde_json::to_string(&tool_use.input)
399 .unwrap_or_default(),
400 },
401 },
402 };
403
404 if let Some(deepseek::RequestMessage::Assistant { tool_calls, .. }) =
405 messages.last_mut()
406 {
407 tool_calls.push(tool_call);
408 } else {
409 messages.push(deepseek::RequestMessage::Assistant {
410 content: None,
411 tool_calls: vec![tool_call],
412 });
413 }
414 }
415 MessageContent::ToolResult(tool_result) => {
416 match &tool_result.content {
417 LanguageModelToolResultContent::Text(text) => {
418 messages.push(deepseek::RequestMessage::Tool {
419 content: text.to_string(),
420 tool_call_id: tool_result.tool_use_id.to_string(),
421 });
422 }
423 LanguageModelToolResultContent::Image(_) => {}
424 };
425 }
426 }
427 }
428 }
429
430 deepseek::Request {
431 model: model.id().to_string(),
432 messages,
433 stream: true,
434 max_tokens: max_output_tokens,
435 temperature: if is_reasoner {
436 None
437 } else {
438 request.temperature
439 },
440 response_format: None,
441 tools: request
442 .tools
443 .into_iter()
444 .map(|tool| deepseek::ToolDefinition::Function {
445 function: deepseek::FunctionDefinition {
446 name: tool.name,
447 description: Some(tool.description),
448 parameters: Some(tool.input_schema),
449 },
450 })
451 .collect(),
452 }
453}
454
455pub struct DeepSeekEventMapper {
456 tool_calls_by_index: HashMap<usize, RawToolCall>,
457}
458
459impl DeepSeekEventMapper {
460 pub fn new() -> Self {
461 Self {
462 tool_calls_by_index: HashMap::default(),
463 }
464 }
465
466 pub fn map_stream(
467 mut self,
468 events: Pin<Box<dyn Send + Stream<Item = Result<deepseek::StreamResponse>>>>,
469 ) -> impl Stream<Item = Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>
470 {
471 events.flat_map(move |event| {
472 futures::stream::iter(match event {
473 Ok(event) => self.map_event(event),
474 Err(error) => vec![Err(LanguageModelCompletionError::from(error))],
475 })
476 })
477 }
478
479 pub fn map_event(
480 &mut self,
481 event: deepseek::StreamResponse,
482 ) -> Vec<Result<LanguageModelCompletionEvent, LanguageModelCompletionError>> {
483 let Some(choice) = event.choices.first() else {
484 return vec![Err(LanguageModelCompletionError::from(anyhow!(
485 "Response contained no choices"
486 )))];
487 };
488
489 let mut events = Vec::new();
490 if let Some(content) = choice.delta.content.clone() {
491 events.push(Ok(LanguageModelCompletionEvent::Text(content)));
492 }
493
494 if let Some(reasoning_content) = choice.delta.reasoning_content.clone() {
495 events.push(Ok(LanguageModelCompletionEvent::Thinking {
496 text: reasoning_content,
497 signature: None,
498 }));
499 }
500
501 if let Some(tool_calls) = choice.delta.tool_calls.as_ref() {
502 for tool_call in tool_calls {
503 let entry = self.tool_calls_by_index.entry(tool_call.index).or_default();
504
505 if let Some(tool_id) = tool_call.id.clone() {
506 entry.id = tool_id;
507 }
508
509 if let Some(function) = tool_call.function.as_ref() {
510 if let Some(name) = function.name.clone() {
511 entry.name = name;
512 }
513
514 if let Some(arguments) = function.arguments.clone() {
515 entry.arguments.push_str(&arguments);
516 }
517 }
518 }
519 }
520
521 if let Some(usage) = event.usage {
522 events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
523 input_tokens: usage.prompt_tokens,
524 output_tokens: usage.completion_tokens,
525 cache_creation_input_tokens: 0,
526 cache_read_input_tokens: 0,
527 })));
528 }
529
530 match choice.finish_reason.as_deref() {
531 Some("stop") => {
532 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
533 }
534 Some("tool_calls") => {
535 events.extend(self.tool_calls_by_index.drain().map(|(_, tool_call)| {
536 match serde_json::Value::from_str(&tool_call.arguments) {
537 Ok(input) => Ok(LanguageModelCompletionEvent::ToolUse(
538 LanguageModelToolUse {
539 id: tool_call.id.clone().into(),
540 name: tool_call.name.as_str().into(),
541 is_input_complete: true,
542 input,
543 raw_input: tool_call.arguments.clone(),
544 },
545 )),
546 Err(error) => Ok(LanguageModelCompletionEvent::ToolUseJsonParseError {
547 id: tool_call.id.clone().into(),
548 tool_name: tool_call.name.as_str().into(),
549 raw_input: tool_call.arguments.into(),
550 json_parse_error: error.to_string(),
551 }),
552 }
553 }));
554
555 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::ToolUse)));
556 }
557 Some(stop_reason) => {
558 log::error!("Unexpected DeepSeek stop_reason: {stop_reason:?}",);
559 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
560 }
561 None => {}
562 }
563
564 events
565 }
566}
567
568struct ConfigurationView {
569 api_key_editor: Entity<Editor>,
570 state: Entity<State>,
571 load_credentials_task: Option<Task<()>>,
572}
573
574impl ConfigurationView {
575 fn new(state: Entity<State>, window: &mut Window, cx: &mut Context<Self>) -> Self {
576 let api_key_editor = cx.new(|cx| {
577 let mut editor = Editor::single_line(window, cx);
578 editor.set_placeholder_text("sk-00000000000000000000000000000000", window, cx);
579 editor
580 });
581
582 cx.observe(&state, |_, _, cx| {
583 cx.notify();
584 })
585 .detach();
586
587 let load_credentials_task = Some(cx.spawn({
588 let state = state.clone();
589 async move |this, cx| {
590 if let Some(task) = state
591 .update(cx, |state, cx| state.authenticate(cx))
592 .log_err()
593 {
594 let _ = task.await;
595 }
596
597 this.update(cx, |this, cx| {
598 this.load_credentials_task = None;
599 cx.notify();
600 })
601 .log_err();
602 }
603 }));
604
605 Self {
606 api_key_editor,
607 state,
608 load_credentials_task,
609 }
610 }
611
612 fn save_api_key(&mut self, _: &menu::Confirm, _window: &mut Window, cx: &mut Context<Self>) {
613 let api_key = self.api_key_editor.read(cx).text(cx);
614 if api_key.is_empty() {
615 return;
616 }
617
618 let state = self.state.clone();
619 cx.spawn(async move |_, cx| {
620 state
621 .update(cx, |state, cx| state.set_api_key(api_key, cx))?
622 .await
623 })
624 .detach_and_log_err(cx);
625
626 cx.notify();
627 }
628
629 fn reset_api_key(&mut self, window: &mut Window, cx: &mut Context<Self>) {
630 self.api_key_editor
631 .update(cx, |editor, cx| editor.set_text("", window, cx));
632
633 let state = self.state.clone();
634 cx.spawn(async move |_, cx| state.update(cx, |state, cx| state.reset_api_key(cx))?.await)
635 .detach_and_log_err(cx);
636
637 cx.notify();
638 }
639
640 fn render_api_key_editor(&self, cx: &mut Context<Self>) -> impl IntoElement {
641 let settings = ThemeSettings::get_global(cx);
642 let text_style = TextStyle {
643 color: cx.theme().colors().text,
644 font_family: settings.ui_font.family.clone(),
645 font_features: settings.ui_font.features.clone(),
646 font_fallbacks: settings.ui_font.fallbacks.clone(),
647 font_size: rems(0.875).into(),
648 font_weight: settings.ui_font.weight,
649 font_style: FontStyle::Normal,
650 line_height: relative(1.3),
651 background_color: None,
652 underline: None,
653 strikethrough: None,
654 white_space: WhiteSpace::Normal,
655 ..Default::default()
656 };
657 EditorElement::new(
658 &self.api_key_editor,
659 EditorStyle {
660 background: cx.theme().colors().editor_background,
661 local_player: cx.theme().players().local(),
662 text: text_style,
663 ..Default::default()
664 },
665 )
666 }
667
668 fn should_render_editor(&self, cx: &mut Context<Self>) -> bool {
669 !self.state.read(cx).is_authenticated()
670 }
671}
672
673impl Render for ConfigurationView {
674 fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
675 let env_var_set = self.state.read(cx).api_key_from_env;
676
677 if self.load_credentials_task.is_some() {
678 div().child(Label::new("Loading credentials...")).into_any()
679 } else if self.should_render_editor(cx) {
680 v_flex()
681 .size_full()
682 .on_action(cx.listener(Self::save_api_key))
683 .child(Label::new("To use DeepSeek in Zed, you need an API key:"))
684 .child(
685 List::new()
686 .child(InstructionListItem::new(
687 "Get your API key from the",
688 Some("DeepSeek console"),
689 Some("https://platform.deepseek.com/api_keys"),
690 ))
691 .child(InstructionListItem::text_only(
692 "Paste your API key below and hit enter to start using the assistant",
693 )),
694 )
695 .child(
696 h_flex()
697 .w_full()
698 .my_2()
699 .px_2()
700 .py_1()
701 .bg(cx.theme().colors().editor_background)
702 .border_1()
703 .border_color(cx.theme().colors().border)
704 .rounded_sm()
705 .child(self.render_api_key_editor(cx)),
706 )
707 .child(
708 Label::new(format!(
709 "Or set the {} environment variable.",
710 DEEPSEEK_API_KEY_VAR
711 ))
712 .size(LabelSize::Small)
713 .color(Color::Muted),
714 )
715 .into_any()
716 } else {
717 h_flex()
718 .mt_1()
719 .p_1()
720 .justify_between()
721 .rounded_md()
722 .border_1()
723 .border_color(cx.theme().colors().border)
724 .bg(cx.theme().colors().background)
725 .child(
726 h_flex()
727 .gap_1()
728 .child(Icon::new(IconName::Check).color(Color::Success))
729 .child(Label::new(if env_var_set {
730 format!("API key set in {}", DEEPSEEK_API_KEY_VAR)
731 } else {
732 "API key configured".to_string()
733 })),
734 )
735 .child(
736 Button::new("reset-key", "Reset Key")
737 .label_size(LabelSize::Small)
738 .icon(Some(IconName::Trash))
739 .icon_size(IconSize::Small)
740 .icon_position(IconPosition::Start)
741 .disabled(env_var_set)
742 .on_click(
743 cx.listener(|this, _, window, cx| this.reset_api_key(window, cx)),
744 ),
745 )
746 .into_any()
747 }
748 }
749}