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