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