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, 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::{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<'static, Result<BoxStream<'static, Result<LanguageModelCompletionEvent>>>> {
328 let request = into_deepseek(
329 request,
330 self.model.id().to_string(),
331 self.max_output_tokens(),
332 );
333 let stream = self.stream_completion(request, cx);
334
335 async move {
336 let stream = stream.await?;
337 Ok(stream
338 .map(|result| {
339 result.and_then(|response| {
340 response
341 .choices
342 .first()
343 .ok_or_else(|| anyhow!("Empty response"))
344 .map(|choice| {
345 choice
346 .delta
347 .content
348 .clone()
349 .unwrap_or_default()
350 .map(LanguageModelCompletionEvent::Text)
351 })
352 })
353 })
354 .boxed())
355 }
356 .boxed()
357 }
358}
359
360pub fn into_deepseek(
361 request: LanguageModelRequest,
362 model: String,
363 max_output_tokens: Option<u32>,
364) -> deepseek::Request {
365 let is_reasoner = model == "deepseek-reasoner";
366
367 let len = request.messages.len();
368 let merged_messages =
369 request
370 .messages
371 .into_iter()
372 .fold(Vec::with_capacity(len), |mut acc, msg| {
373 let role = msg.role;
374 let content = msg.string_contents();
375
376 if is_reasoner {
377 if let Some(last_msg) = acc.last_mut() {
378 match (last_msg, role) {
379 (deepseek::RequestMessage::User { content: last }, Role::User) => {
380 last.push(' ');
381 last.push_str(&content);
382 return acc;
383 }
384
385 (
386 deepseek::RequestMessage::Assistant {
387 content: last_content,
388 ..
389 },
390 Role::Assistant,
391 ) => {
392 *last_content = last_content
393 .take()
394 .map(|c| {
395 let mut s =
396 String::with_capacity(c.len() + content.len() + 1);
397 s.push_str(&c);
398 s.push(' ');
399 s.push_str(&content);
400 s
401 })
402 .or(Some(content));
403
404 return acc;
405 }
406 _ => {}
407 }
408 }
409 }
410
411 acc.push(match role {
412 Role::User => deepseek::RequestMessage::User { content },
413 Role::Assistant => deepseek::RequestMessage::Assistant {
414 content: Some(content),
415 tool_calls: Vec::new(),
416 },
417 Role::System => deepseek::RequestMessage::System { content },
418 });
419 acc
420 });
421
422 deepseek::Request {
423 model,
424 messages: merged_messages,
425 stream: true,
426 max_tokens: max_output_tokens,
427 temperature: if is_reasoner {
428 None
429 } else {
430 request.temperature
431 },
432 response_format: None,
433 tools: request
434 .tools
435 .into_iter()
436 .map(|tool| deepseek::ToolDefinition::Function {
437 function: deepseek::FunctionDefinition {
438 name: tool.name,
439 description: Some(tool.description),
440 parameters: Some(tool.input_schema),
441 },
442 })
443 .collect(),
444 }
445}
446
447struct ConfigurationView {
448 api_key_editor: Entity<Editor>,
449 state: Entity<State>,
450 load_credentials_task: Option<Task<()>>,
451}
452
453impl ConfigurationView {
454 fn new(state: Entity<State>, window: &mut Window, cx: &mut Context<Self>) -> Self {
455 let api_key_editor = cx.new(|cx| {
456 let mut editor = Editor::single_line(window, cx);
457 editor.set_placeholder_text("sk-00000000000000000000000000000000", cx);
458 editor
459 });
460
461 cx.observe(&state, |_, _, cx| {
462 cx.notify();
463 })
464 .detach();
465
466 let load_credentials_task = Some(cx.spawn({
467 let state = state.clone();
468 async move |this, cx| {
469 if let Some(task) = state
470 .update(cx, |state, cx| state.authenticate(cx))
471 .log_err()
472 {
473 let _ = task.await;
474 }
475
476 this.update(cx, |this, cx| {
477 this.load_credentials_task = None;
478 cx.notify();
479 })
480 .log_err();
481 }
482 }));
483
484 Self {
485 api_key_editor,
486 state,
487 load_credentials_task,
488 }
489 }
490
491 fn save_api_key(&mut self, _: &menu::Confirm, _window: &mut Window, cx: &mut Context<Self>) {
492 let api_key = self.api_key_editor.read(cx).text(cx);
493 if api_key.is_empty() {
494 return;
495 }
496
497 let state = self.state.clone();
498 cx.spawn(async move |_, cx| {
499 state
500 .update(cx, |state, cx| state.set_api_key(api_key, cx))?
501 .await
502 })
503 .detach_and_log_err(cx);
504
505 cx.notify();
506 }
507
508 fn reset_api_key(&mut self, window: &mut Window, cx: &mut Context<Self>) {
509 self.api_key_editor
510 .update(cx, |editor, cx| editor.set_text("", window, cx));
511
512 let state = self.state.clone();
513 cx.spawn(async move |_, cx| state.update(cx, |state, cx| state.reset_api_key(cx))?.await)
514 .detach_and_log_err(cx);
515
516 cx.notify();
517 }
518
519 fn render_api_key_editor(&self, cx: &mut Context<Self>) -> impl IntoElement {
520 let settings = ThemeSettings::get_global(cx);
521 let text_style = TextStyle {
522 color: cx.theme().colors().text,
523 font_family: settings.ui_font.family.clone(),
524 font_features: settings.ui_font.features.clone(),
525 font_fallbacks: settings.ui_font.fallbacks.clone(),
526 font_size: rems(0.875).into(),
527 font_weight: settings.ui_font.weight,
528 font_style: FontStyle::Normal,
529 line_height: relative(1.3),
530 background_color: None,
531 underline: None,
532 strikethrough: None,
533 white_space: WhiteSpace::Normal,
534 ..Default::default()
535 };
536 EditorElement::new(
537 &self.api_key_editor,
538 EditorStyle {
539 background: cx.theme().colors().editor_background,
540 local_player: cx.theme().players().local(),
541 text: text_style,
542 ..Default::default()
543 },
544 )
545 }
546
547 fn should_render_editor(&self, cx: &mut Context<Self>) -> bool {
548 !self.state.read(cx).is_authenticated()
549 }
550}
551
552impl Render for ConfigurationView {
553 fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
554 let env_var_set = self.state.read(cx).api_key_from_env;
555
556 if self.load_credentials_task.is_some() {
557 div().child(Label::new("Loading credentials...")).into_any()
558 } else if self.should_render_editor(cx) {
559 v_flex()
560 .size_full()
561 .on_action(cx.listener(Self::save_api_key))
562 .child(Label::new("To use DeepSeek in Zed, you need an API key:"))
563 .child(
564 List::new()
565 .child(InstructionListItem::new(
566 "Get your API key from the",
567 Some("DeepSeek console"),
568 Some("https://platform.deepseek.com/api_keys"),
569 ))
570 .child(InstructionListItem::text_only(
571 "Paste your API key below and hit enter to start using the assistant",
572 )),
573 )
574 .child(
575 h_flex()
576 .w_full()
577 .my_2()
578 .px_2()
579 .py_1()
580 .bg(cx.theme().colors().editor_background)
581 .border_1()
582 .border_color(cx.theme().colors().border)
583 .rounded_sm()
584 .child(self.render_api_key_editor(cx)),
585 )
586 .child(
587 Label::new(format!(
588 "Or set the {} environment variable.",
589 DEEPSEEK_API_KEY_VAR
590 ))
591 .size(LabelSize::Small)
592 .color(Color::Muted),
593 )
594 .into_any()
595 } else {
596 h_flex()
597 .mt_1()
598 .p_1()
599 .justify_between()
600 .rounded_md()
601 .border_1()
602 .border_color(cx.theme().colors().border)
603 .bg(cx.theme().colors().background)
604 .child(
605 h_flex()
606 .gap_1()
607 .child(Icon::new(IconName::Check).color(Color::Success))
608 .child(Label::new(if env_var_set {
609 format!("API key set in {}", DEEPSEEK_API_KEY_VAR)
610 } else {
611 "API key configured".to_string()
612 })),
613 )
614 .child(
615 Button::new("reset-key", "Reset Key")
616 .label_size(LabelSize::Small)
617 .icon(Some(IconName::Trash))
618 .icon_size(IconSize::Small)
619 .icon_position(IconPosition::Start)
620 .disabled(env_var_set)
621 .on_click(
622 cx.listener(|this, _, window, cx| this.reset_api_key(window, cx)),
623 ),
624 )
625 .into_any()
626 }
627 }
628}