1use anyhow::{Context as _, Result, anyhow};
2use collections::BTreeMap;
3use credentials_provider::CredentialsProvider;
4use editor::{Editor, EditorElement, EditorStyle};
5use futures::{FutureExt, StreamExt, future::BoxFuture, stream::BoxStream};
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, LanguageModelCompletionError, LanguageModelCompletionEvent,
13 LanguageModelId, LanguageModelName, LanguageModelProvider, LanguageModelProviderId,
14 LanguageModelProviderName, 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::{Icon, IconName, List, prelude::*};
22use util::ResultExt;
23
24use crate::{AllLanguageModelSettings, ui::InstructionListItem};
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 fn create_language_model(&self, model: deepseek::Model) -> Arc<dyn LanguageModel> {
145 Arc::new(DeepSeekLanguageModel {
146 id: LanguageModelId::from(model.id().to_string()),
147 model,
148 state: self.state.clone(),
149 http_client: self.http_client.clone(),
150 request_limiter: RateLimiter::new(4),
151 }) as Arc<dyn LanguageModel>
152 }
153}
154
155impl LanguageModelProviderState for DeepSeekLanguageModelProvider {
156 type ObservableEntity = State;
157
158 fn observable_entity(&self) -> Option<Entity<Self::ObservableEntity>> {
159 Some(self.state.clone())
160 }
161}
162
163impl LanguageModelProvider for DeepSeekLanguageModelProvider {
164 fn id(&self) -> LanguageModelProviderId {
165 LanguageModelProviderId(PROVIDER_ID.into())
166 }
167
168 fn name(&self) -> LanguageModelProviderName {
169 LanguageModelProviderName(PROVIDER_NAME.into())
170 }
171
172 fn icon(&self) -> IconName {
173 IconName::AiDeepSeek
174 }
175
176 fn default_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
177 Some(self.create_language_model(deepseek::Model::default()))
178 }
179
180 fn default_fast_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
181 Some(self.create_language_model(deepseek::Model::default_fast()))
182 }
183
184 fn provided_models(&self, cx: &App) -> Vec<Arc<dyn LanguageModel>> {
185 let mut models = BTreeMap::default();
186
187 models.insert("deepseek-chat", deepseek::Model::Chat);
188 models.insert("deepseek-reasoner", deepseek::Model::Reasoner);
189
190 for available_model in AllLanguageModelSettings::get_global(cx)
191 .deepseek
192 .available_models
193 .iter()
194 {
195 models.insert(
196 &available_model.name,
197 deepseek::Model::Custom {
198 name: available_model.name.clone(),
199 display_name: available_model.display_name.clone(),
200 max_tokens: available_model.max_tokens,
201 max_output_tokens: available_model.max_output_tokens,
202 },
203 );
204 }
205
206 models
207 .into_values()
208 .map(|model| self.create_language_model(model))
209 .collect()
210 }
211
212 fn is_authenticated(&self, cx: &App) -> bool {
213 self.state.read(cx).is_authenticated()
214 }
215
216 fn authenticate(&self, cx: &mut App) -> Task<Result<(), AuthenticateError>> {
217 self.state.update(cx, |state, cx| state.authenticate(cx))
218 }
219
220 fn configuration_view(&self, window: &mut Window, cx: &mut App) -> AnyView {
221 cx.new(|cx| ConfigurationView::new(self.state.clone(), window, cx))
222 .into()
223 }
224
225 fn reset_credentials(&self, cx: &mut App) -> Task<Result<()>> {
226 self.state.update(cx, |state, cx| state.reset_api_key(cx))
227 }
228}
229
230pub struct DeepSeekLanguageModel {
231 id: LanguageModelId,
232 model: deepseek::Model,
233 state: Entity<State>,
234 http_client: Arc<dyn HttpClient>,
235 request_limiter: RateLimiter,
236}
237
238impl DeepSeekLanguageModel {
239 fn stream_completion(
240 &self,
241 request: deepseek::Request,
242 cx: &AsyncApp,
243 ) -> BoxFuture<'static, Result<BoxStream<'static, Result<deepseek::StreamResponse>>>> {
244 let http_client = self.http_client.clone();
245 let Ok((api_key, api_url)) = cx.read_entity(&self.state, |state, cx| {
246 let settings = &AllLanguageModelSettings::get_global(cx).deepseek;
247 (state.api_key.clone(), settings.api_url.clone())
248 }) else {
249 return futures::future::ready(Err(anyhow!("App state dropped"))).boxed();
250 };
251
252 let future = self.request_limiter.stream(async move {
253 let api_key = api_key.ok_or_else(|| anyhow!("Missing DeepSeek API Key"))?;
254 let request =
255 deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
256 let response = request.await?;
257 Ok(response)
258 });
259
260 async move { Ok(future.await?.boxed()) }.boxed()
261 }
262}
263
264impl LanguageModel for DeepSeekLanguageModel {
265 fn id(&self) -> LanguageModelId {
266 self.id.clone()
267 }
268
269 fn name(&self) -> LanguageModelName {
270 LanguageModelName::from(self.model.display_name().to_string())
271 }
272
273 fn provider_id(&self) -> LanguageModelProviderId {
274 LanguageModelProviderId(PROVIDER_ID.into())
275 }
276
277 fn provider_name(&self) -> LanguageModelProviderName {
278 LanguageModelProviderName(PROVIDER_NAME.into())
279 }
280
281 fn supports_tools(&self) -> bool {
282 false
283 }
284
285 fn telemetry_id(&self) -> String {
286 format!("deepseek/{}", self.model.id())
287 }
288
289 fn max_token_count(&self) -> usize {
290 self.model.max_token_count()
291 }
292
293 fn max_output_tokens(&self) -> Option<u32> {
294 self.model.max_output_tokens()
295 }
296
297 fn count_tokens(
298 &self,
299 request: LanguageModelRequest,
300 cx: &App,
301 ) -> BoxFuture<'static, Result<usize>> {
302 cx.background_spawn(async move {
303 let messages = request
304 .messages
305 .into_iter()
306 .map(|message| tiktoken_rs::ChatCompletionRequestMessage {
307 role: match message.role {
308 Role::User => "user".into(),
309 Role::Assistant => "assistant".into(),
310 Role::System => "system".into(),
311 },
312 content: Some(message.string_contents()),
313 name: None,
314 function_call: None,
315 })
316 .collect::<Vec<_>>();
317
318 tiktoken_rs::num_tokens_from_messages("gpt-4", &messages)
319 })
320 .boxed()
321 }
322
323 fn stream_completion(
324 &self,
325 request: LanguageModelRequest,
326 cx: &AsyncApp,
327 ) -> BoxFuture<
328 'static,
329 Result<
330 BoxStream<'static, Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>,
331 >,
332 > {
333 let request = into_deepseek(
334 request,
335 self.model.id().to_string(),
336 self.max_output_tokens(),
337 );
338 let stream = self.stream_completion(request, cx);
339
340 async move {
341 let stream = stream.await?;
342 Ok(stream
343 .map(|result| {
344 result
345 .and_then(|response| {
346 response
347 .choices
348 .first()
349 .ok_or_else(|| anyhow!("Empty response"))
350 .map(|choice| {
351 choice
352 .delta
353 .content
354 .clone()
355 .unwrap_or_default()
356 .map(LanguageModelCompletionEvent::Text)
357 })
358 })
359 .map_err(LanguageModelCompletionError::Other)
360 })
361 .boxed())
362 }
363 .boxed()
364 }
365}
366
367pub fn into_deepseek(
368 request: LanguageModelRequest,
369 model: String,
370 max_output_tokens: Option<u32>,
371) -> deepseek::Request {
372 let is_reasoner = model == "deepseek-reasoner";
373
374 let len = request.messages.len();
375 let merged_messages =
376 request
377 .messages
378 .into_iter()
379 .fold(Vec::with_capacity(len), |mut acc, msg| {
380 let role = msg.role;
381 let content = msg.string_contents();
382
383 if is_reasoner {
384 if let Some(last_msg) = acc.last_mut() {
385 match (last_msg, role) {
386 (deepseek::RequestMessage::User { content: last }, Role::User) => {
387 last.push(' ');
388 last.push_str(&content);
389 return acc;
390 }
391
392 (
393 deepseek::RequestMessage::Assistant {
394 content: last_content,
395 ..
396 },
397 Role::Assistant,
398 ) => {
399 *last_content = last_content
400 .take()
401 .map(|c| {
402 let mut s =
403 String::with_capacity(c.len() + content.len() + 1);
404 s.push_str(&c);
405 s.push(' ');
406 s.push_str(&content);
407 s
408 })
409 .or(Some(content));
410
411 return acc;
412 }
413 _ => {}
414 }
415 }
416 }
417
418 acc.push(match role {
419 Role::User => deepseek::RequestMessage::User { content },
420 Role::Assistant => deepseek::RequestMessage::Assistant {
421 content: Some(content),
422 tool_calls: Vec::new(),
423 },
424 Role::System => deepseek::RequestMessage::System { content },
425 });
426 acc
427 });
428
429 deepseek::Request {
430 model,
431 messages: merged_messages,
432 stream: true,
433 max_tokens: max_output_tokens,
434 temperature: if is_reasoner {
435 None
436 } else {
437 request.temperature
438 },
439 response_format: None,
440 tools: request
441 .tools
442 .into_iter()
443 .map(|tool| deepseek::ToolDefinition::Function {
444 function: deepseek::FunctionDefinition {
445 name: tool.name,
446 description: Some(tool.description),
447 parameters: Some(tool.input_schema),
448 },
449 })
450 .collect(),
451 }
452}
453
454struct ConfigurationView {
455 api_key_editor: Entity<Editor>,
456 state: Entity<State>,
457 load_credentials_task: Option<Task<()>>,
458}
459
460impl ConfigurationView {
461 fn new(state: Entity<State>, window: &mut Window, cx: &mut Context<Self>) -> Self {
462 let api_key_editor = cx.new(|cx| {
463 let mut editor = Editor::single_line(window, cx);
464 editor.set_placeholder_text("sk-00000000000000000000000000000000", cx);
465 editor
466 });
467
468 cx.observe(&state, |_, _, cx| {
469 cx.notify();
470 })
471 .detach();
472
473 let load_credentials_task = Some(cx.spawn({
474 let state = state.clone();
475 async move |this, cx| {
476 if let Some(task) = state
477 .update(cx, |state, cx| state.authenticate(cx))
478 .log_err()
479 {
480 let _ = task.await;
481 }
482
483 this.update(cx, |this, cx| {
484 this.load_credentials_task = None;
485 cx.notify();
486 })
487 .log_err();
488 }
489 }));
490
491 Self {
492 api_key_editor,
493 state,
494 load_credentials_task,
495 }
496 }
497
498 fn save_api_key(&mut self, _: &menu::Confirm, _window: &mut Window, cx: &mut Context<Self>) {
499 let api_key = self.api_key_editor.read(cx).text(cx);
500 if api_key.is_empty() {
501 return;
502 }
503
504 let state = self.state.clone();
505 cx.spawn(async move |_, cx| {
506 state
507 .update(cx, |state, cx| state.set_api_key(api_key, cx))?
508 .await
509 })
510 .detach_and_log_err(cx);
511
512 cx.notify();
513 }
514
515 fn reset_api_key(&mut self, window: &mut Window, cx: &mut Context<Self>) {
516 self.api_key_editor
517 .update(cx, |editor, cx| editor.set_text("", window, cx));
518
519 let state = self.state.clone();
520 cx.spawn(async move |_, cx| state.update(cx, |state, cx| state.reset_api_key(cx))?.await)
521 .detach_and_log_err(cx);
522
523 cx.notify();
524 }
525
526 fn render_api_key_editor(&self, cx: &mut Context<Self>) -> impl IntoElement {
527 let settings = ThemeSettings::get_global(cx);
528 let text_style = TextStyle {
529 color: cx.theme().colors().text,
530 font_family: settings.ui_font.family.clone(),
531 font_features: settings.ui_font.features.clone(),
532 font_fallbacks: settings.ui_font.fallbacks.clone(),
533 font_size: rems(0.875).into(),
534 font_weight: settings.ui_font.weight,
535 font_style: FontStyle::Normal,
536 line_height: relative(1.3),
537 background_color: None,
538 underline: None,
539 strikethrough: None,
540 white_space: WhiteSpace::Normal,
541 ..Default::default()
542 };
543 EditorElement::new(
544 &self.api_key_editor,
545 EditorStyle {
546 background: cx.theme().colors().editor_background,
547 local_player: cx.theme().players().local(),
548 text: text_style,
549 ..Default::default()
550 },
551 )
552 }
553
554 fn should_render_editor(&self, cx: &mut Context<Self>) -> bool {
555 !self.state.read(cx).is_authenticated()
556 }
557}
558
559impl Render for ConfigurationView {
560 fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
561 let env_var_set = self.state.read(cx).api_key_from_env;
562
563 if self.load_credentials_task.is_some() {
564 div().child(Label::new("Loading credentials...")).into_any()
565 } else if self.should_render_editor(cx) {
566 v_flex()
567 .size_full()
568 .on_action(cx.listener(Self::save_api_key))
569 .child(Label::new("To use DeepSeek in Zed, you need an API key:"))
570 .child(
571 List::new()
572 .child(InstructionListItem::new(
573 "Get your API key from the",
574 Some("DeepSeek console"),
575 Some("https://platform.deepseek.com/api_keys"),
576 ))
577 .child(InstructionListItem::text_only(
578 "Paste your API key below and hit enter to start using the assistant",
579 )),
580 )
581 .child(
582 h_flex()
583 .w_full()
584 .my_2()
585 .px_2()
586 .py_1()
587 .bg(cx.theme().colors().editor_background)
588 .border_1()
589 .border_color(cx.theme().colors().border)
590 .rounded_sm()
591 .child(self.render_api_key_editor(cx)),
592 )
593 .child(
594 Label::new(format!(
595 "Or set the {} environment variable.",
596 DEEPSEEK_API_KEY_VAR
597 ))
598 .size(LabelSize::Small)
599 .color(Color::Muted),
600 )
601 .into_any()
602 } else {
603 h_flex()
604 .mt_1()
605 .p_1()
606 .justify_between()
607 .rounded_md()
608 .border_1()
609 .border_color(cx.theme().colors().border)
610 .bg(cx.theme().colors().background)
611 .child(
612 h_flex()
613 .gap_1()
614 .child(Icon::new(IconName::Check).color(Color::Success))
615 .child(Label::new(if env_var_set {
616 format!("API key set in {}", DEEPSEEK_API_KEY_VAR)
617 } else {
618 "API key configured".to_string()
619 })),
620 )
621 .child(
622 Button::new("reset-key", "Reset Key")
623 .label_size(LabelSize::Small)
624 .icon(Some(IconName::Trash))
625 .icon_size(IconSize::Small)
626 .icon_position(IconPosition::Start)
627 .disabled(env_var_set)
628 .on_click(
629 cx.listener(|this, _, window, cx| this.reset_api_key(window, cx)),
630 ),
631 )
632 .into_any()
633 }
634 }
635}