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,
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: &str = "deepseek";
32const PROVIDER_NAME: &str = "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: usize,
53 pub max_output_tokens: Option<u32>,
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 LanguageModelProviderId(PROVIDER_ID.into())
178 }
179
180 fn name(&self) -> LanguageModelProviderName {
181 LanguageModelProviderName(PROVIDER_NAME.into())
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(&self, window: &mut Window, cx: &mut App) -> AnyView {
233 cx.new(|cx| ConfigurationView::new(self.state.clone(), window, cx))
234 .into()
235 }
236
237 fn reset_credentials(&self, cx: &mut App) -> Task<Result<()>> {
238 self.state.update(cx, |state, cx| state.reset_api_key(cx))
239 }
240}
241
242pub struct DeepSeekLanguageModel {
243 id: LanguageModelId,
244 model: deepseek::Model,
245 state: Entity<State>,
246 http_client: Arc<dyn HttpClient>,
247 request_limiter: RateLimiter,
248}
249
250impl DeepSeekLanguageModel {
251 fn stream_completion(
252 &self,
253 request: deepseek::Request,
254 cx: &AsyncApp,
255 ) -> BoxFuture<'static, Result<BoxStream<'static, Result<deepseek::StreamResponse>>>> {
256 let http_client = self.http_client.clone();
257 let Ok((api_key, api_url)) = cx.read_entity(&self.state, |state, cx| {
258 let settings = &AllLanguageModelSettings::get_global(cx).deepseek;
259 (state.api_key.clone(), settings.api_url.clone())
260 }) else {
261 return futures::future::ready(Err(anyhow!("App state dropped"))).boxed();
262 };
263
264 let future = self.request_limiter.stream(async move {
265 let api_key = api_key.context("Missing DeepSeek API Key")?;
266 let request =
267 deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
268 let response = request.await?;
269 Ok(response)
270 });
271
272 async move { Ok(future.await?.boxed()) }.boxed()
273 }
274}
275
276impl LanguageModel for DeepSeekLanguageModel {
277 fn id(&self) -> LanguageModelId {
278 self.id.clone()
279 }
280
281 fn name(&self) -> LanguageModelName {
282 LanguageModelName::from(self.model.display_name().to_string())
283 }
284
285 fn provider_id(&self) -> LanguageModelProviderId {
286 LanguageModelProviderId(PROVIDER_ID.into())
287 }
288
289 fn provider_name(&self) -> LanguageModelProviderName {
290 LanguageModelProviderName(PROVIDER_NAME.into())
291 }
292
293 fn supports_tools(&self) -> bool {
294 true
295 }
296
297 fn supports_tool_choice(&self, _choice: LanguageModelToolChoice) -> bool {
298 true
299 }
300
301 fn supports_images(&self) -> bool {
302 false
303 }
304
305 fn telemetry_id(&self) -> String {
306 format!("deepseek/{}", self.model.id())
307 }
308
309 fn max_token_count(&self) -> usize {
310 self.model.max_token_count()
311 }
312
313 fn max_output_tokens(&self) -> Option<u32> {
314 self.model.max_output_tokens()
315 }
316
317 fn count_tokens(
318 &self,
319 request: LanguageModelRequest,
320 cx: &App,
321 ) -> BoxFuture<'static, Result<usize>> {
322 cx.background_spawn(async move {
323 let messages = request
324 .messages
325 .into_iter()
326 .map(|message| tiktoken_rs::ChatCompletionRequestMessage {
327 role: match message.role {
328 Role::User => "user".into(),
329 Role::Assistant => "assistant".into(),
330 Role::System => "system".into(),
331 },
332 content: Some(message.string_contents()),
333 name: None,
334 function_call: None,
335 })
336 .collect::<Vec<_>>();
337
338 tiktoken_rs::num_tokens_from_messages("gpt-4", &messages)
339 })
340 .boxed()
341 }
342
343 fn stream_completion(
344 &self,
345 request: LanguageModelRequest,
346 cx: &AsyncApp,
347 ) -> BoxFuture<
348 'static,
349 Result<
350 BoxStream<'static, Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>,
351 >,
352 > {
353 let request = into_deepseek(request, &self.model, self.max_output_tokens());
354 let stream = self.stream_completion(request, cx);
355
356 async move {
357 let mapper = DeepSeekEventMapper::new();
358 Ok(mapper.map_stream(stream.await?).boxed())
359 }
360 .boxed()
361 }
362}
363
364pub fn into_deepseek(
365 request: LanguageModelRequest,
366 model: &deepseek::Model,
367 max_output_tokens: Option<u32>,
368) -> deepseek::Request {
369 let is_reasoner = *model == deepseek::Model::Reasoner;
370
371 let mut messages = Vec::new();
372 for message in request.messages {
373 for content in message.content {
374 match content {
375 MessageContent::Text(text) | MessageContent::Thinking { text, .. } => messages
376 .push(match message.role {
377 Role::User => deepseek::RequestMessage::User { content: text },
378 Role::Assistant => deepseek::RequestMessage::Assistant {
379 content: Some(text),
380 tool_calls: Vec::new(),
381 },
382 Role::System => deepseek::RequestMessage::System { content: text },
383 }),
384 MessageContent::RedactedThinking(_) => {}
385 MessageContent::Image(_) => {}
386 MessageContent::ToolUse(tool_use) => {
387 let tool_call = deepseek::ToolCall {
388 id: tool_use.id.to_string(),
389 content: deepseek::ToolCallContent::Function {
390 function: deepseek::FunctionContent {
391 name: tool_use.name.to_string(),
392 arguments: serde_json::to_string(&tool_use.input)
393 .unwrap_or_default(),
394 },
395 },
396 };
397
398 if let Some(deepseek::RequestMessage::Assistant { tool_calls, .. }) =
399 messages.last_mut()
400 {
401 tool_calls.push(tool_call);
402 } else {
403 messages.push(deepseek::RequestMessage::Assistant {
404 content: None,
405 tool_calls: vec![tool_call],
406 });
407 }
408 }
409 MessageContent::ToolResult(tool_result) => {
410 match &tool_result.content {
411 LanguageModelToolResultContent::Text(text) => {
412 messages.push(deepseek::RequestMessage::Tool {
413 content: text.to_string(),
414 tool_call_id: tool_result.tool_use_id.to_string(),
415 });
416 }
417 LanguageModelToolResultContent::Image(_) => {}
418 };
419 }
420 }
421 }
422 }
423
424 deepseek::Request {
425 model: model.id().to_string(),
426 messages,
427 stream: true,
428 max_tokens: max_output_tokens,
429 temperature: if is_reasoner {
430 None
431 } else {
432 request.temperature
433 },
434 response_format: None,
435 tools: request
436 .tools
437 .into_iter()
438 .map(|tool| deepseek::ToolDefinition::Function {
439 function: deepseek::FunctionDefinition {
440 name: tool.name,
441 description: Some(tool.description),
442 parameters: Some(tool.input_schema),
443 },
444 })
445 .collect(),
446 }
447}
448
449pub struct DeepSeekEventMapper {
450 tool_calls_by_index: HashMap<usize, RawToolCall>,
451}
452
453impl DeepSeekEventMapper {
454 pub fn new() -> Self {
455 Self {
456 tool_calls_by_index: HashMap::default(),
457 }
458 }
459
460 pub fn map_stream(
461 mut self,
462 events: Pin<Box<dyn Send + Stream<Item = Result<deepseek::StreamResponse>>>>,
463 ) -> impl Stream<Item = Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>
464 {
465 events.flat_map(move |event| {
466 futures::stream::iter(match event {
467 Ok(event) => self.map_event(event),
468 Err(error) => vec![Err(LanguageModelCompletionError::Other(anyhow!(error)))],
469 })
470 })
471 }
472
473 pub fn map_event(
474 &mut self,
475 event: deepseek::StreamResponse,
476 ) -> Vec<Result<LanguageModelCompletionEvent, LanguageModelCompletionError>> {
477 let Some(choice) = event.choices.first() else {
478 return vec![Err(LanguageModelCompletionError::Other(anyhow!(
479 "Response contained no choices"
480 )))];
481 };
482
483 let mut events = Vec::new();
484 if let Some(content) = choice.delta.content.clone() {
485 events.push(Ok(LanguageModelCompletionEvent::Text(content)));
486 }
487
488 if let Some(tool_calls) = choice.delta.tool_calls.as_ref() {
489 for tool_call in tool_calls {
490 let entry = self.tool_calls_by_index.entry(tool_call.index).or_default();
491
492 if let Some(tool_id) = tool_call.id.clone() {
493 entry.id = tool_id;
494 }
495
496 if let Some(function) = tool_call.function.as_ref() {
497 if let Some(name) = function.name.clone() {
498 entry.name = name;
499 }
500
501 if let Some(arguments) = function.arguments.clone() {
502 entry.arguments.push_str(&arguments);
503 }
504 }
505 }
506 }
507
508 match choice.finish_reason.as_deref() {
509 Some("stop") => {
510 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
511 }
512 Some("tool_calls") => {
513 events.extend(self.tool_calls_by_index.drain().map(|(_, tool_call)| {
514 match serde_json::Value::from_str(&tool_call.arguments) {
515 Ok(input) => Ok(LanguageModelCompletionEvent::ToolUse(
516 LanguageModelToolUse {
517 id: tool_call.id.clone().into(),
518 name: tool_call.name.as_str().into(),
519 is_input_complete: true,
520 input,
521 raw_input: tool_call.arguments.clone(),
522 },
523 )),
524 Err(error) => Err(LanguageModelCompletionError::BadInputJson {
525 id: tool_call.id.into(),
526 tool_name: tool_call.name.as_str().into(),
527 raw_input: tool_call.arguments.into(),
528 json_parse_error: error.to_string(),
529 }),
530 }
531 }));
532
533 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::ToolUse)));
534 }
535 Some(stop_reason) => {
536 log::error!("Unexpected DeepSeek stop_reason: {stop_reason:?}",);
537 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
538 }
539 None => {}
540 }
541
542 events
543 }
544}
545
546struct ConfigurationView {
547 api_key_editor: Entity<Editor>,
548 state: Entity<State>,
549 load_credentials_task: Option<Task<()>>,
550}
551
552impl ConfigurationView {
553 fn new(state: Entity<State>, window: &mut Window, cx: &mut Context<Self>) -> Self {
554 let api_key_editor = cx.new(|cx| {
555 let mut editor = Editor::single_line(window, cx);
556 editor.set_placeholder_text("sk-00000000000000000000000000000000", cx);
557 editor
558 });
559
560 cx.observe(&state, |_, _, cx| {
561 cx.notify();
562 })
563 .detach();
564
565 let load_credentials_task = Some(cx.spawn({
566 let state = state.clone();
567 async move |this, cx| {
568 if let Some(task) = state
569 .update(cx, |state, cx| state.authenticate(cx))
570 .log_err()
571 {
572 let _ = task.await;
573 }
574
575 this.update(cx, |this, cx| {
576 this.load_credentials_task = None;
577 cx.notify();
578 })
579 .log_err();
580 }
581 }));
582
583 Self {
584 api_key_editor,
585 state,
586 load_credentials_task,
587 }
588 }
589
590 fn save_api_key(&mut self, _: &menu::Confirm, _window: &mut Window, cx: &mut Context<Self>) {
591 let api_key = self.api_key_editor.read(cx).text(cx);
592 if api_key.is_empty() {
593 return;
594 }
595
596 let state = self.state.clone();
597 cx.spawn(async move |_, cx| {
598 state
599 .update(cx, |state, cx| state.set_api_key(api_key, cx))?
600 .await
601 })
602 .detach_and_log_err(cx);
603
604 cx.notify();
605 }
606
607 fn reset_api_key(&mut self, window: &mut Window, cx: &mut Context<Self>) {
608 self.api_key_editor
609 .update(cx, |editor, cx| editor.set_text("", window, cx));
610
611 let state = self.state.clone();
612 cx.spawn(async move |_, cx| state.update(cx, |state, cx| state.reset_api_key(cx))?.await)
613 .detach_and_log_err(cx);
614
615 cx.notify();
616 }
617
618 fn render_api_key_editor(&self, cx: &mut Context<Self>) -> impl IntoElement {
619 let settings = ThemeSettings::get_global(cx);
620 let text_style = TextStyle {
621 color: cx.theme().colors().text,
622 font_family: settings.ui_font.family.clone(),
623 font_features: settings.ui_font.features.clone(),
624 font_fallbacks: settings.ui_font.fallbacks.clone(),
625 font_size: rems(0.875).into(),
626 font_weight: settings.ui_font.weight,
627 font_style: FontStyle::Normal,
628 line_height: relative(1.3),
629 background_color: None,
630 underline: None,
631 strikethrough: None,
632 white_space: WhiteSpace::Normal,
633 ..Default::default()
634 };
635 EditorElement::new(
636 &self.api_key_editor,
637 EditorStyle {
638 background: cx.theme().colors().editor_background,
639 local_player: cx.theme().players().local(),
640 text: text_style,
641 ..Default::default()
642 },
643 )
644 }
645
646 fn should_render_editor(&self, cx: &mut Context<Self>) -> bool {
647 !self.state.read(cx).is_authenticated()
648 }
649}
650
651impl Render for ConfigurationView {
652 fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
653 let env_var_set = self.state.read(cx).api_key_from_env;
654
655 if self.load_credentials_task.is_some() {
656 div().child(Label::new("Loading credentials...")).into_any()
657 } else if self.should_render_editor(cx) {
658 v_flex()
659 .size_full()
660 .on_action(cx.listener(Self::save_api_key))
661 .child(Label::new("To use DeepSeek in Zed, you need an API key:"))
662 .child(
663 List::new()
664 .child(InstructionListItem::new(
665 "Get your API key from the",
666 Some("DeepSeek console"),
667 Some("https://platform.deepseek.com/api_keys"),
668 ))
669 .child(InstructionListItem::text_only(
670 "Paste your API key below and hit enter to start using the assistant",
671 )),
672 )
673 .child(
674 h_flex()
675 .w_full()
676 .my_2()
677 .px_2()
678 .py_1()
679 .bg(cx.theme().colors().editor_background)
680 .border_1()
681 .border_color(cx.theme().colors().border)
682 .rounded_sm()
683 .child(self.render_api_key_editor(cx)),
684 )
685 .child(
686 Label::new(format!(
687 "Or set the {} environment variable.",
688 DEEPSEEK_API_KEY_VAR
689 ))
690 .size(LabelSize::Small)
691 .color(Color::Muted),
692 )
693 .into_any()
694 } else {
695 h_flex()
696 .mt_1()
697 .p_1()
698 .justify_between()
699 .rounded_md()
700 .border_1()
701 .border_color(cx.theme().colors().border)
702 .bg(cx.theme().colors().background)
703 .child(
704 h_flex()
705 .gap_1()
706 .child(Icon::new(IconName::Check).color(Color::Success))
707 .child(Label::new(if env_var_set {
708 format!("API key set in {}", DEEPSEEK_API_KEY_VAR)
709 } else {
710 "API key configured".to_string()
711 })),
712 )
713 .child(
714 Button::new("reset-key", "Reset Key")
715 .label_size(LabelSize::Small)
716 .icon(Some(IconName::Trash))
717 .icon_size(IconSize::Small)
718 .icon_position(IconPosition::Start)
719 .disabled(env_var_set)
720 .on_click(
721 cx.listener(|this, _, window, cx| this.reset_api_key(window, cx)),
722 ),
723 )
724 .into_any()
725 }
726 }
727}