1use anyhow::{anyhow, Context as _, Result};
2use collections::BTreeMap;
3use credentials_provider::CredentialsProvider;
4use editor::{Editor, EditorElement, EditorStyle};
5use futures::{future::BoxFuture, stream::BoxStream, FutureExt, StreamExt};
6use gpui::{
7 AnyView, AppContext as _, AsyncApp, Entity, FontStyle, Subscription, Task, TextStyle,
8 WhiteSpace,
9};
10use http_client::HttpClient;
11use language_model::{
12 AuthenticateError, LanguageModel, LanguageModelCompletionEvent, LanguageModelId,
13 LanguageModelName, LanguageModelProvider, LanguageModelProviderId, LanguageModelProviderName,
14 LanguageModelProviderState, LanguageModelRequest, RateLimiter, Role,
15};
16use schemars::JsonSchema;
17use serde::{Deserialize, Serialize};
18use settings::{Settings, SettingsStore};
19use std::sync::Arc;
20use theme::ThemeSettings;
21use ui::{prelude::*, Icon, IconName, List};
22use util::ResultExt;
23
24use crate::{ui::InstructionListItem, AllLanguageModelSettings};
25
26const PROVIDER_ID: &str = "deepseek";
27const PROVIDER_NAME: &str = "DeepSeek";
28const DEEPSEEK_API_KEY_VAR: &str = "DEEPSEEK_API_KEY";
29
30#[derive(Default, Clone, Debug, PartialEq)]
31pub struct DeepSeekSettings {
32 pub api_url: String,
33 pub available_models: Vec<AvailableModel>,
34}
35
36#[derive(Clone, Debug, PartialEq, Serialize, Deserialize, JsonSchema)]
37pub struct AvailableModel {
38 pub name: String,
39 pub display_name: Option<String>,
40 pub max_tokens: usize,
41 pub max_output_tokens: Option<u32>,
42}
43
44pub struct DeepSeekLanguageModelProvider {
45 http_client: Arc<dyn HttpClient>,
46 state: Entity<State>,
47}
48
49pub struct State {
50 api_key: Option<String>,
51 api_key_from_env: bool,
52 _subscription: Subscription,
53}
54
55impl State {
56 fn is_authenticated(&self) -> bool {
57 self.api_key.is_some()
58 }
59
60 fn reset_api_key(&self, cx: &mut Context<Self>) -> Task<Result<()>> {
61 let credentials_provider = <dyn CredentialsProvider>::global(cx);
62 let api_url = AllLanguageModelSettings::get_global(cx)
63 .deepseek
64 .api_url
65 .clone();
66 cx.spawn(async move |this, cx| {
67 credentials_provider
68 .delete_credentials(&api_url, &cx)
69 .await
70 .log_err();
71 this.update(cx, |this, cx| {
72 this.api_key = None;
73 this.api_key_from_env = false;
74 cx.notify();
75 })
76 })
77 }
78
79 fn set_api_key(&mut self, api_key: String, cx: &mut Context<Self>) -> Task<Result<()>> {
80 let credentials_provider = <dyn CredentialsProvider>::global(cx);
81 let api_url = AllLanguageModelSettings::get_global(cx)
82 .deepseek
83 .api_url
84 .clone();
85 cx.spawn(async move |this, cx| {
86 credentials_provider
87 .write_credentials(&api_url, "Bearer", api_key.as_bytes(), &cx)
88 .await?;
89 this.update(cx, |this, cx| {
90 this.api_key = Some(api_key);
91 cx.notify();
92 })
93 })
94 }
95
96 fn authenticate(&self, cx: &mut Context<Self>) -> Task<Result<(), AuthenticateError>> {
97 if self.is_authenticated() {
98 return Task::ready(Ok(()));
99 }
100
101 let credentials_provider = <dyn CredentialsProvider>::global(cx);
102 let api_url = AllLanguageModelSettings::get_global(cx)
103 .deepseek
104 .api_url
105 .clone();
106 cx.spawn(async move |this, cx| {
107 let (api_key, from_env) = if let Ok(api_key) = std::env::var(DEEPSEEK_API_KEY_VAR) {
108 (api_key, true)
109 } else {
110 let (_, api_key) = credentials_provider
111 .read_credentials(&api_url, &cx)
112 .await?
113 .ok_or(AuthenticateError::CredentialsNotFound)?;
114 (
115 String::from_utf8(api_key).context("invalid {PROVIDER_NAME} API key")?,
116 false,
117 )
118 };
119
120 this.update(cx, |this, cx| {
121 this.api_key = Some(api_key);
122 this.api_key_from_env = from_env;
123 cx.notify();
124 })?;
125
126 Ok(())
127 })
128 }
129}
130
131impl DeepSeekLanguageModelProvider {
132 pub fn new(http_client: Arc<dyn HttpClient>, cx: &mut App) -> Self {
133 let state = cx.new(|cx| State {
134 api_key: None,
135 api_key_from_env: false,
136 _subscription: cx.observe_global::<SettingsStore>(|_this: &mut State, cx| {
137 cx.notify();
138 }),
139 });
140
141 Self { http_client, state }
142 }
143}
144
145impl LanguageModelProviderState for DeepSeekLanguageModelProvider {
146 type ObservableEntity = State;
147
148 fn observable_entity(&self) -> Option<Entity<Self::ObservableEntity>> {
149 Some(self.state.clone())
150 }
151}
152
153impl LanguageModelProvider for DeepSeekLanguageModelProvider {
154 fn id(&self) -> LanguageModelProviderId {
155 LanguageModelProviderId(PROVIDER_ID.into())
156 }
157
158 fn name(&self) -> LanguageModelProviderName {
159 LanguageModelProviderName(PROVIDER_NAME.into())
160 }
161
162 fn icon(&self) -> IconName {
163 IconName::AiDeepSeek
164 }
165
166 fn default_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
167 let model = deepseek::Model::Chat;
168 Some(Arc::new(DeepSeekLanguageModel {
169 id: LanguageModelId::from(model.id().to_string()),
170 model,
171 state: self.state.clone(),
172 http_client: self.http_client.clone(),
173 request_limiter: RateLimiter::new(4),
174 }))
175 }
176
177 fn provided_models(&self, cx: &App) -> Vec<Arc<dyn LanguageModel>> {
178 let mut models = BTreeMap::default();
179
180 models.insert("deepseek-chat", deepseek::Model::Chat);
181 models.insert("deepseek-reasoner", deepseek::Model::Reasoner);
182
183 for available_model in AllLanguageModelSettings::get_global(cx)
184 .deepseek
185 .available_models
186 .iter()
187 {
188 models.insert(
189 &available_model.name,
190 deepseek::Model::Custom {
191 name: available_model.name.clone(),
192 display_name: available_model.display_name.clone(),
193 max_tokens: available_model.max_tokens,
194 max_output_tokens: available_model.max_output_tokens,
195 },
196 );
197 }
198
199 models
200 .into_values()
201 .map(|model| {
202 Arc::new(DeepSeekLanguageModel {
203 id: LanguageModelId::from(model.id().to_string()),
204 model,
205 state: self.state.clone(),
206 http_client: self.http_client.clone(),
207 request_limiter: RateLimiter::new(4),
208 }) as Arc<dyn LanguageModel>
209 })
210 .collect()
211 }
212
213 fn is_authenticated(&self, cx: &App) -> bool {
214 self.state.read(cx).is_authenticated()
215 }
216
217 fn authenticate(&self, cx: &mut App) -> Task<Result<(), AuthenticateError>> {
218 self.state.update(cx, |state, cx| state.authenticate(cx))
219 }
220
221 fn configuration_view(&self, window: &mut Window, cx: &mut App) -> AnyView {
222 cx.new(|cx| ConfigurationView::new(self.state.clone(), window, cx))
223 .into()
224 }
225
226 fn reset_credentials(&self, cx: &mut App) -> Task<Result<()>> {
227 self.state.update(cx, |state, cx| state.reset_api_key(cx))
228 }
229}
230
231pub struct DeepSeekLanguageModel {
232 id: LanguageModelId,
233 model: deepseek::Model,
234 state: Entity<State>,
235 http_client: Arc<dyn HttpClient>,
236 request_limiter: RateLimiter,
237}
238
239impl DeepSeekLanguageModel {
240 fn stream_completion(
241 &self,
242 request: deepseek::Request,
243 cx: &AsyncApp,
244 ) -> BoxFuture<'static, Result<BoxStream<'static, Result<deepseek::StreamResponse>>>> {
245 let http_client = self.http_client.clone();
246 let Ok((api_key, api_url)) = cx.read_entity(&self.state, |state, cx| {
247 let settings = &AllLanguageModelSettings::get_global(cx).deepseek;
248 (state.api_key.clone(), settings.api_url.clone())
249 }) else {
250 return futures::future::ready(Err(anyhow!("App state dropped"))).boxed();
251 };
252
253 let future = self.request_limiter.stream(async move {
254 let api_key = api_key.ok_or_else(|| anyhow!("Missing DeepSeek API Key"))?;
255 let request =
256 deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
257 let response = request.await?;
258 Ok(response)
259 });
260
261 async move { Ok(future.await?.boxed()) }.boxed()
262 }
263}
264
265impl LanguageModel for DeepSeekLanguageModel {
266 fn id(&self) -> LanguageModelId {
267 self.id.clone()
268 }
269
270 fn name(&self) -> LanguageModelName {
271 LanguageModelName::from(self.model.display_name().to_string())
272 }
273
274 fn provider_id(&self) -> LanguageModelProviderId {
275 LanguageModelProviderId(PROVIDER_ID.into())
276 }
277
278 fn provider_name(&self) -> LanguageModelProviderName {
279 LanguageModelProviderName(PROVIDER_NAME.into())
280 }
281
282 fn telemetry_id(&self) -> String {
283 format!("deepseek/{}", self.model.id())
284 }
285
286 fn max_token_count(&self) -> usize {
287 self.model.max_token_count()
288 }
289
290 fn max_output_tokens(&self) -> Option<u32> {
291 self.model.max_output_tokens()
292 }
293
294 fn count_tokens(
295 &self,
296 request: LanguageModelRequest,
297 cx: &App,
298 ) -> BoxFuture<'static, Result<usize>> {
299 cx.background_spawn(async move {
300 let messages = request
301 .messages
302 .into_iter()
303 .map(|message| tiktoken_rs::ChatCompletionRequestMessage {
304 role: match message.role {
305 Role::User => "user".into(),
306 Role::Assistant => "assistant".into(),
307 Role::System => "system".into(),
308 },
309 content: Some(message.string_contents()),
310 name: None,
311 function_call: None,
312 })
313 .collect::<Vec<_>>();
314
315 tiktoken_rs::num_tokens_from_messages("gpt-4", &messages)
316 })
317 .boxed()
318 }
319
320 fn stream_completion(
321 &self,
322 request: LanguageModelRequest,
323 cx: &AsyncApp,
324 ) -> BoxFuture<'static, Result<BoxStream<'static, Result<LanguageModelCompletionEvent>>>> {
325 let request = into_deepseek(
326 request,
327 self.model.id().to_string(),
328 self.max_output_tokens(),
329 );
330 let stream = self.stream_completion(request, cx);
331
332 async move {
333 let stream = stream.await?;
334 Ok(stream
335 .map(|result| {
336 result.and_then(|response| {
337 response
338 .choices
339 .first()
340 .ok_or_else(|| anyhow!("Empty response"))
341 .map(|choice| {
342 choice
343 .delta
344 .content
345 .clone()
346 .unwrap_or_default()
347 .map(LanguageModelCompletionEvent::Text)
348 })
349 })
350 })
351 .boxed())
352 }
353 .boxed()
354 }
355
356 fn use_any_tool(
357 &self,
358 request: LanguageModelRequest,
359 name: String,
360 description: String,
361 schema: serde_json::Value,
362 cx: &AsyncApp,
363 ) -> BoxFuture<'static, Result<futures::stream::BoxStream<'static, Result<String>>>> {
364 let mut deepseek_request = into_deepseek(
365 request,
366 self.model.id().to_string(),
367 self.max_output_tokens(),
368 );
369
370 deepseek_request.tools = vec![deepseek::ToolDefinition::Function {
371 function: deepseek::FunctionDefinition {
372 name: name.clone(),
373 description: Some(description),
374 parameters: Some(schema),
375 },
376 }];
377
378 let response_stream = self.stream_completion(deepseek_request, cx);
379
380 self.request_limiter
381 .run(async move {
382 let stream = response_stream.await?;
383
384 let tool_args_stream = stream
385 .filter_map(move |response| async move {
386 match response {
387 Ok(response) => {
388 for choice in response.choices {
389 if let Some(tool_calls) = choice.delta.tool_calls {
390 for tool_call in tool_calls {
391 if let Some(function) = tool_call.function {
392 if let Some(args) = function.arguments {
393 return Some(Ok(args));
394 }
395 }
396 }
397 }
398 }
399 None
400 }
401 Err(e) => Some(Err(e)),
402 }
403 })
404 .boxed();
405
406 Ok(tool_args_stream)
407 })
408 .boxed()
409 }
410}
411
412pub fn into_deepseek(
413 request: LanguageModelRequest,
414 model: String,
415 max_output_tokens: Option<u32>,
416) -> deepseek::Request {
417 let is_reasoner = model == "deepseek-reasoner";
418
419 let len = request.messages.len();
420 let merged_messages =
421 request
422 .messages
423 .into_iter()
424 .fold(Vec::with_capacity(len), |mut acc, msg| {
425 let role = msg.role;
426 let content = msg.string_contents();
427
428 if is_reasoner {
429 if let Some(last_msg) = acc.last_mut() {
430 match (last_msg, role) {
431 (deepseek::RequestMessage::User { content: last }, Role::User) => {
432 last.push(' ');
433 last.push_str(&content);
434 return acc;
435 }
436
437 (
438 deepseek::RequestMessage::Assistant {
439 content: last_content,
440 ..
441 },
442 Role::Assistant,
443 ) => {
444 *last_content = last_content
445 .take()
446 .map(|c| {
447 let mut s =
448 String::with_capacity(c.len() + content.len() + 1);
449 s.push_str(&c);
450 s.push(' ');
451 s.push_str(&content);
452 s
453 })
454 .or(Some(content));
455
456 return acc;
457 }
458 _ => {}
459 }
460 }
461 }
462
463 acc.push(match role {
464 Role::User => deepseek::RequestMessage::User { content },
465 Role::Assistant => deepseek::RequestMessage::Assistant {
466 content: Some(content),
467 tool_calls: Vec::new(),
468 },
469 Role::System => deepseek::RequestMessage::System { content },
470 });
471 acc
472 });
473
474 deepseek::Request {
475 model,
476 messages: merged_messages,
477 stream: true,
478 max_tokens: max_output_tokens,
479 temperature: if is_reasoner {
480 None
481 } else {
482 request.temperature
483 },
484 response_format: None,
485 tools: request
486 .tools
487 .into_iter()
488 .map(|tool| deepseek::ToolDefinition::Function {
489 function: deepseek::FunctionDefinition {
490 name: tool.name,
491 description: Some(tool.description),
492 parameters: Some(tool.input_schema),
493 },
494 })
495 .collect(),
496 }
497}
498
499struct ConfigurationView {
500 api_key_editor: Entity<Editor>,
501 state: Entity<State>,
502 load_credentials_task: Option<Task<()>>,
503}
504
505impl ConfigurationView {
506 fn new(state: Entity<State>, window: &mut Window, cx: &mut Context<Self>) -> Self {
507 let api_key_editor = cx.new(|cx| {
508 let mut editor = Editor::single_line(window, cx);
509 editor.set_placeholder_text("sk-00000000000000000000000000000000", cx);
510 editor
511 });
512
513 cx.observe(&state, |_, _, cx| {
514 cx.notify();
515 })
516 .detach();
517
518 let load_credentials_task = Some(cx.spawn({
519 let state = state.clone();
520 async move |this, cx| {
521 if let Some(task) = state
522 .update(cx, |state, cx| state.authenticate(cx))
523 .log_err()
524 {
525 let _ = task.await;
526 }
527
528 this.update(cx, |this, cx| {
529 this.load_credentials_task = None;
530 cx.notify();
531 })
532 .log_err();
533 }
534 }));
535
536 Self {
537 api_key_editor,
538 state,
539 load_credentials_task,
540 }
541 }
542
543 fn save_api_key(&mut self, _: &menu::Confirm, _window: &mut Window, cx: &mut Context<Self>) {
544 let api_key = self.api_key_editor.read(cx).text(cx);
545 if api_key.is_empty() {
546 return;
547 }
548
549 let state = self.state.clone();
550 cx.spawn(async move |_, cx| {
551 state
552 .update(cx, |state, cx| state.set_api_key(api_key, cx))?
553 .await
554 })
555 .detach_and_log_err(cx);
556
557 cx.notify();
558 }
559
560 fn reset_api_key(&mut self, window: &mut Window, cx: &mut Context<Self>) {
561 self.api_key_editor
562 .update(cx, |editor, cx| editor.set_text("", window, cx));
563
564 let state = self.state.clone();
565 cx.spawn(async move |_, cx| state.update(cx, |state, cx| state.reset_api_key(cx))?.await)
566 .detach_and_log_err(cx);
567
568 cx.notify();
569 }
570
571 fn render_api_key_editor(&self, cx: &mut Context<Self>) -> impl IntoElement {
572 let settings = ThemeSettings::get_global(cx);
573 let text_style = TextStyle {
574 color: cx.theme().colors().text,
575 font_family: settings.ui_font.family.clone(),
576 font_features: settings.ui_font.features.clone(),
577 font_fallbacks: settings.ui_font.fallbacks.clone(),
578 font_size: rems(0.875).into(),
579 font_weight: settings.ui_font.weight,
580 font_style: FontStyle::Normal,
581 line_height: relative(1.3),
582 background_color: None,
583 underline: None,
584 strikethrough: None,
585 white_space: WhiteSpace::Normal,
586 ..Default::default()
587 };
588 EditorElement::new(
589 &self.api_key_editor,
590 EditorStyle {
591 background: cx.theme().colors().editor_background,
592 local_player: cx.theme().players().local(),
593 text: text_style,
594 ..Default::default()
595 },
596 )
597 }
598
599 fn should_render_editor(&self, cx: &mut Context<Self>) -> bool {
600 !self.state.read(cx).is_authenticated()
601 }
602}
603
604impl Render for ConfigurationView {
605 fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
606 let env_var_set = self.state.read(cx).api_key_from_env;
607
608 if self.load_credentials_task.is_some() {
609 div().child(Label::new("Loading credentials...")).into_any()
610 } else if self.should_render_editor(cx) {
611 v_flex()
612 .size_full()
613 .on_action(cx.listener(Self::save_api_key))
614 .child(Label::new("To use DeepSeek in Zed, you need an API key:"))
615 .child(
616 List::new()
617 .child(InstructionListItem::new(
618 "Get your API key from the",
619 Some("DeepSeek console"),
620 Some("https://platform.deepseek.com/api_keys"),
621 ))
622 .child(InstructionListItem::text_only(
623 "Paste your API key below and hit enter to start using the assistant",
624 )),
625 )
626 .child(
627 h_flex()
628 .w_full()
629 .my_2()
630 .px_2()
631 .py_1()
632 .bg(cx.theme().colors().editor_background)
633 .border_1()
634 .border_color(cx.theme().colors().border_variant)
635 .rounded_sm()
636 .child(self.render_api_key_editor(cx)),
637 )
638 .child(
639 Label::new(format!(
640 "Or set the {} environment variable.",
641 DEEPSEEK_API_KEY_VAR
642 ))
643 .size(LabelSize::Small)
644 .color(Color::Muted),
645 )
646 .into_any()
647 } else {
648 h_flex()
649 .size_full()
650 .justify_between()
651 .child(
652 h_flex()
653 .gap_1()
654 .child(Icon::new(IconName::Check).color(Color::Success))
655 .child(Label::new(if env_var_set {
656 format!("API key set in {}", DEEPSEEK_API_KEY_VAR)
657 } else {
658 "API key configured".to_string()
659 })),
660 )
661 .child(
662 Button::new("reset-key", "Reset")
663 .icon(IconName::Trash)
664 .disabled(env_var_set)
665 .on_click(
666 cx.listener(|this, _, window, cx| this.reset_api_key(window, cx)),
667 ),
668 )
669 .into_any()
670 }
671 }
672}