1use anyhow::{Result, anyhow};
2use collections::{BTreeMap, HashMap};
3use editor::{Editor, EditorElement, EditorStyle};
4use futures::Stream;
5use futures::{FutureExt, StreamExt, future::BoxFuture, stream::BoxStream};
6use gpui::{
7 AnyView, App, AsyncApp, Context, Entity, FontStyle, SharedString, Task, TextStyle, WhiteSpace,
8 Window,
9};
10use http_client::HttpClient;
11use language_model::{
12 AuthenticateError, LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent,
13 LanguageModelId, LanguageModelName, LanguageModelProvider, LanguageModelProviderId,
14 LanguageModelProviderName, LanguageModelProviderState, LanguageModelRequest,
15 LanguageModelToolChoice, LanguageModelToolResultContent, LanguageModelToolUse, MessageContent,
16 RateLimiter, Role, StopReason, TokenUsage,
17};
18use schemars::JsonSchema;
19use serde::{Deserialize, Serialize};
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;
27use zed_env_vars::{EnvVar, env_var};
28
29use crate::{AllLanguageModelSettings, 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}
49
50#[derive(Clone, Debug, PartialEq, Serialize, Deserialize, JsonSchema)]
51pub struct AvailableModel {
52 pub name: String,
53 pub display_name: Option<String>,
54 pub max_tokens: u64,
55 pub max_output_tokens: Option<u64>,
56}
57
58pub struct DeepSeekLanguageModelProvider {
59 http_client: Arc<dyn HttpClient>,
60 state: Entity<State>,
61}
62
63pub struct State {
64 api_key_state: ApiKeyState,
65}
66
67impl State {
68 fn is_authenticated(&self) -> bool {
69 self.api_key_state.has_key()
70 }
71
72 fn set_api_key(&mut self, api_key: Option<String>, cx: &mut Context<Self>) -> Task<Result<()>> {
73 let api_url = SharedString::new(DeepSeekLanguageModelProvider::api_url(cx));
74 self.api_key_state
75 .store(api_url, api_key, |this| &mut this.api_key_state, cx)
76 }
77
78 fn authenticate(&mut self, cx: &mut Context<Self>) -> Task<Result<(), AuthenticateError>> {
79 let api_url = SharedString::new(DeepSeekLanguageModelProvider::api_url(cx));
80 self.api_key_state.load_if_needed(
81 api_url,
82 &API_KEY_ENV_VAR,
83 |this| &mut this.api_key_state,
84 cx,
85 )
86 }
87}
88
89impl DeepSeekLanguageModelProvider {
90 pub fn new(http_client: Arc<dyn HttpClient>, cx: &mut App) -> Self {
91 let state = cx.new(|cx| {
92 cx.observe_global::<SettingsStore>(|this: &mut State, cx| {
93 let api_url = SharedString::new(Self::api_url(cx));
94 this.api_key_state.handle_url_change(
95 api_url,
96 &API_KEY_ENV_VAR,
97 |this| &mut this.api_key_state,
98 cx,
99 );
100 cx.notify();
101 })
102 .detach();
103 State {
104 api_key_state: ApiKeyState::new(SharedString::new(Self::api_url(cx))),
105 }
106 });
107
108 Self { http_client, state }
109 }
110
111 fn create_language_model(&self, model: deepseek::Model) -> Arc<dyn LanguageModel> {
112 Arc::new(DeepSeekLanguageModel {
113 id: LanguageModelId::from(model.id().to_string()),
114 model,
115 state: self.state.clone(),
116 http_client: self.http_client.clone(),
117 request_limiter: RateLimiter::new(4),
118 })
119 }
120
121 fn settings(cx: &App) -> &DeepSeekSettings {
122 &AllLanguageModelSettings::get_global(cx).deepseek
123 }
124
125 fn api_url(cx: &App) -> &str {
126 &Self::settings(cx).api_url
127 }
128}
129
130impl LanguageModelProviderState for DeepSeekLanguageModelProvider {
131 type ObservableEntity = State;
132
133 fn observable_entity(&self) -> Option<Entity<Self::ObservableEntity>> {
134 Some(self.state.clone())
135 }
136}
137
138impl LanguageModelProvider for DeepSeekLanguageModelProvider {
139 fn id(&self) -> LanguageModelProviderId {
140 PROVIDER_ID
141 }
142
143 fn name(&self) -> LanguageModelProviderName {
144 PROVIDER_NAME
145 }
146
147 fn icon(&self) -> IconName {
148 IconName::AiDeepSeek
149 }
150
151 fn default_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
152 Some(self.create_language_model(deepseek::Model::default()))
153 }
154
155 fn default_fast_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
156 Some(self.create_language_model(deepseek::Model::default_fast()))
157 }
158
159 fn provided_models(&self, cx: &App) -> Vec<Arc<dyn LanguageModel>> {
160 let mut models = BTreeMap::default();
161
162 models.insert("deepseek-chat", deepseek::Model::Chat);
163 models.insert("deepseek-reasoner", deepseek::Model::Reasoner);
164
165 for available_model in &Self::settings(cx).available_models {
166 models.insert(
167 &available_model.name,
168 deepseek::Model::Custom {
169 name: available_model.name.clone(),
170 display_name: available_model.display_name.clone(),
171 max_tokens: available_model.max_tokens,
172 max_output_tokens: available_model.max_output_tokens,
173 },
174 );
175 }
176
177 models
178 .into_values()
179 .map(|model| self.create_language_model(model))
180 .collect()
181 }
182
183 fn is_authenticated(&self, cx: &App) -> bool {
184 self.state.read(cx).is_authenticated()
185 }
186
187 fn authenticate(&self, cx: &mut App) -> Task<Result<(), AuthenticateError>> {
188 self.state.update(cx, |state, cx| state.authenticate(cx))
189 }
190
191 fn configuration_view(
192 &self,
193 _target_agent: language_model::ConfigurationViewTargetAgent,
194 window: &mut Window,
195 cx: &mut App,
196 ) -> AnyView {
197 cx.new(|cx| ConfigurationView::new(self.state.clone(), window, cx))
198 .into()
199 }
200
201 fn reset_credentials(&self, cx: &mut App) -> Task<Result<()>> {
202 self.state
203 .update(cx, |state, cx| state.set_api_key(None, cx))
204 }
205}
206
207pub struct DeepSeekLanguageModel {
208 id: LanguageModelId,
209 model: deepseek::Model,
210 state: Entity<State>,
211 http_client: Arc<dyn HttpClient>,
212 request_limiter: RateLimiter,
213}
214
215impl DeepSeekLanguageModel {
216 fn stream_completion(
217 &self,
218 request: deepseek::Request,
219 cx: &AsyncApp,
220 ) -> BoxFuture<'static, Result<BoxStream<'static, Result<deepseek::StreamResponse>>>> {
221 let http_client = self.http_client.clone();
222
223 let api_key_and_url = self.state.read_with(cx, |state, cx| {
224 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
225 let api_key = state.api_key_state.key(api_url);
226 (api_key, api_url.to_string())
227 });
228 let (api_key, api_url) = match api_key_and_url {
229 Ok(api_key_and_url) => api_key_and_url,
230 Err(err) => {
231 return futures::future::ready(Err(err)).boxed();
232 }
233 };
234
235 let future = self.request_limiter.stream(async move {
236 let Some(api_key) = api_key else {
237 return Err(LanguageModelCompletionError::NoApiKey {
238 provider: PROVIDER_NAME,
239 });
240 };
241 let request =
242 deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
243 let response = request.await?;
244 Ok(response)
245 });
246
247 async move { Ok(future.await?.boxed()) }.boxed()
248 }
249}
250
251impl LanguageModel for DeepSeekLanguageModel {
252 fn id(&self) -> LanguageModelId {
253 self.id.clone()
254 }
255
256 fn name(&self) -> LanguageModelName {
257 LanguageModelName::from(self.model.display_name().to_string())
258 }
259
260 fn provider_id(&self) -> LanguageModelProviderId {
261 PROVIDER_ID
262 }
263
264 fn provider_name(&self) -> LanguageModelProviderName {
265 PROVIDER_NAME
266 }
267
268 fn supports_tools(&self) -> bool {
269 true
270 }
271
272 fn supports_tool_choice(&self, _choice: LanguageModelToolChoice) -> bool {
273 true
274 }
275
276 fn supports_images(&self) -> bool {
277 false
278 }
279
280 fn telemetry_id(&self) -> String {
281 format!("deepseek/{}", self.model.id())
282 }
283
284 fn max_token_count(&self) -> u64 {
285 self.model.max_token_count()
286 }
287
288 fn max_output_tokens(&self) -> Option<u64> {
289 self.model.max_output_tokens()
290 }
291
292 fn count_tokens(
293 &self,
294 request: LanguageModelRequest,
295 cx: &App,
296 ) -> BoxFuture<'static, Result<u64>> {
297 cx.background_spawn(async move {
298 let messages = request
299 .messages
300 .into_iter()
301 .map(|message| tiktoken_rs::ChatCompletionRequestMessage {
302 role: match message.role {
303 Role::User => "user".into(),
304 Role::Assistant => "assistant".into(),
305 Role::System => "system".into(),
306 },
307 content: Some(message.string_contents()),
308 name: None,
309 function_call: None,
310 })
311 .collect::<Vec<_>>();
312
313 tiktoken_rs::num_tokens_from_messages("gpt-4", &messages).map(|tokens| tokens as u64)
314 })
315 .boxed()
316 }
317
318 fn stream_completion(
319 &self,
320 request: LanguageModelRequest,
321 cx: &AsyncApp,
322 ) -> BoxFuture<
323 'static,
324 Result<
325 BoxStream<'static, Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>,
326 LanguageModelCompletionError,
327 >,
328 > {
329 let request = into_deepseek(request, &self.model, self.max_output_tokens());
330 let stream = self.stream_completion(request, cx);
331
332 async move {
333 let mapper = DeepSeekEventMapper::new();
334 Ok(mapper.map_stream(stream.await?).boxed())
335 }
336 .boxed()
337 }
338}
339
340pub fn into_deepseek(
341 request: LanguageModelRequest,
342 model: &deepseek::Model,
343 max_output_tokens: Option<u64>,
344) -> deepseek::Request {
345 let is_reasoner = *model == deepseek::Model::Reasoner;
346
347 let mut messages = Vec::new();
348 for message in request.messages {
349 for content in message.content {
350 match content {
351 MessageContent::Text(text) => messages.push(match message.role {
352 Role::User => deepseek::RequestMessage::User { content: text },
353 Role::Assistant => deepseek::RequestMessage::Assistant {
354 content: Some(text),
355 tool_calls: Vec::new(),
356 },
357 Role::System => deepseek::RequestMessage::System { content: text },
358 }),
359 MessageContent::Thinking { .. } => {}
360 MessageContent::RedactedThinking(_) => {}
361 MessageContent::Image(_) => {}
362 MessageContent::ToolUse(tool_use) => {
363 let tool_call = deepseek::ToolCall {
364 id: tool_use.id.to_string(),
365 content: deepseek::ToolCallContent::Function {
366 function: deepseek::FunctionContent {
367 name: tool_use.name.to_string(),
368 arguments: serde_json::to_string(&tool_use.input)
369 .unwrap_or_default(),
370 },
371 },
372 };
373
374 if let Some(deepseek::RequestMessage::Assistant { tool_calls, .. }) =
375 messages.last_mut()
376 {
377 tool_calls.push(tool_call);
378 } else {
379 messages.push(deepseek::RequestMessage::Assistant {
380 content: None,
381 tool_calls: vec![tool_call],
382 });
383 }
384 }
385 MessageContent::ToolResult(tool_result) => {
386 match &tool_result.content {
387 LanguageModelToolResultContent::Text(text) => {
388 messages.push(deepseek::RequestMessage::Tool {
389 content: text.to_string(),
390 tool_call_id: tool_result.tool_use_id.to_string(),
391 });
392 }
393 LanguageModelToolResultContent::Image(_) => {}
394 };
395 }
396 }
397 }
398 }
399
400 deepseek::Request {
401 model: model.id().to_string(),
402 messages,
403 stream: true,
404 max_tokens: max_output_tokens,
405 temperature: if is_reasoner {
406 None
407 } else {
408 request.temperature
409 },
410 response_format: None,
411 tools: request
412 .tools
413 .into_iter()
414 .map(|tool| deepseek::ToolDefinition::Function {
415 function: deepseek::FunctionDefinition {
416 name: tool.name,
417 description: Some(tool.description),
418 parameters: Some(tool.input_schema),
419 },
420 })
421 .collect(),
422 }
423}
424
425pub struct DeepSeekEventMapper {
426 tool_calls_by_index: HashMap<usize, RawToolCall>,
427}
428
429impl DeepSeekEventMapper {
430 pub fn new() -> Self {
431 Self {
432 tool_calls_by_index: HashMap::default(),
433 }
434 }
435
436 pub fn map_stream(
437 mut self,
438 events: Pin<Box<dyn Send + Stream<Item = Result<deepseek::StreamResponse>>>>,
439 ) -> impl Stream<Item = Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>
440 {
441 events.flat_map(move |event| {
442 futures::stream::iter(match event {
443 Ok(event) => self.map_event(event),
444 Err(error) => vec![Err(LanguageModelCompletionError::from(error))],
445 })
446 })
447 }
448
449 pub fn map_event(
450 &mut self,
451 event: deepseek::StreamResponse,
452 ) -> Vec<Result<LanguageModelCompletionEvent, LanguageModelCompletionError>> {
453 let Some(choice) = event.choices.first() else {
454 return vec![Err(LanguageModelCompletionError::from(anyhow!(
455 "Response contained no choices"
456 )))];
457 };
458
459 let mut events = Vec::new();
460 if let Some(content) = choice.delta.content.clone() {
461 events.push(Ok(LanguageModelCompletionEvent::Text(content)));
462 }
463
464 if let Some(reasoning_content) = choice.delta.reasoning_content.clone() {
465 events.push(Ok(LanguageModelCompletionEvent::Thinking {
466 text: reasoning_content,
467 signature: None,
468 }));
469 }
470
471 if let Some(tool_calls) = choice.delta.tool_calls.as_ref() {
472 for tool_call in tool_calls {
473 let entry = self.tool_calls_by_index.entry(tool_call.index).or_default();
474
475 if let Some(tool_id) = tool_call.id.clone() {
476 entry.id = tool_id;
477 }
478
479 if let Some(function) = tool_call.function.as_ref() {
480 if let Some(name) = function.name.clone() {
481 entry.name = name;
482 }
483
484 if let Some(arguments) = function.arguments.clone() {
485 entry.arguments.push_str(&arguments);
486 }
487 }
488 }
489 }
490
491 if let Some(usage) = event.usage {
492 events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
493 input_tokens: usage.prompt_tokens,
494 output_tokens: usage.completion_tokens,
495 cache_creation_input_tokens: 0,
496 cache_read_input_tokens: 0,
497 })));
498 }
499
500 match choice.finish_reason.as_deref() {
501 Some("stop") => {
502 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
503 }
504 Some("tool_calls") => {
505 events.extend(self.tool_calls_by_index.drain().map(|(_, tool_call)| {
506 match serde_json::Value::from_str(&tool_call.arguments) {
507 Ok(input) => Ok(LanguageModelCompletionEvent::ToolUse(
508 LanguageModelToolUse {
509 id: tool_call.id.clone().into(),
510 name: tool_call.name.as_str().into(),
511 is_input_complete: true,
512 input,
513 raw_input: tool_call.arguments.clone(),
514 },
515 )),
516 Err(error) => Ok(LanguageModelCompletionEvent::ToolUseJsonParseError {
517 id: tool_call.id.clone().into(),
518 tool_name: tool_call.name.as_str().into(),
519 raw_input: tool_call.arguments.into(),
520 json_parse_error: error.to_string(),
521 }),
522 }
523 }));
524
525 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::ToolUse)));
526 }
527 Some(stop_reason) => {
528 log::error!("Unexpected DeepSeek stop_reason: {stop_reason:?}",);
529 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
530 }
531 None => {}
532 }
533
534 events
535 }
536}
537
538struct ConfigurationView {
539 api_key_editor: Entity<Editor>,
540 state: Entity<State>,
541 load_credentials_task: Option<Task<()>>,
542}
543
544impl ConfigurationView {
545 fn new(state: Entity<State>, window: &mut Window, cx: &mut Context<Self>) -> Self {
546 let api_key_editor = cx.new(|cx| {
547 let mut editor = Editor::single_line(window, cx);
548 editor.set_placeholder_text("sk-00000000000000000000000000000000", window, cx);
549 editor
550 });
551
552 cx.observe(&state, |_, _, cx| {
553 cx.notify();
554 })
555 .detach();
556
557 let load_credentials_task = Some(cx.spawn({
558 let state = state.clone();
559 async move |this, cx| {
560 if let Some(task) = state
561 .update(cx, |state, cx| state.authenticate(cx))
562 .log_err()
563 {
564 let _ = task.await;
565 }
566
567 this.update(cx, |this, cx| {
568 this.load_credentials_task = None;
569 cx.notify();
570 })
571 .log_err();
572 }
573 }));
574
575 Self {
576 api_key_editor,
577 state,
578 load_credentials_task,
579 }
580 }
581
582 fn save_api_key(&mut self, _: &menu::Confirm, _window: &mut Window, cx: &mut Context<Self>) {
583 let api_key = self.api_key_editor.read(cx).text(cx).trim().to_string();
584 if api_key.is_empty() {
585 return;
586 }
587
588 let state = self.state.clone();
589 cx.spawn(async move |_, cx| {
590 state
591 .update(cx, |state, cx| state.set_api_key(Some(api_key), cx))?
592 .await
593 })
594 .detach_and_log_err(cx);
595 }
596
597 fn reset_api_key(&mut self, window: &mut Window, cx: &mut Context<Self>) {
598 self.api_key_editor
599 .update(cx, |editor, cx| editor.set_text("", window, cx));
600
601 let state = self.state.clone();
602 cx.spawn(async move |_, cx| {
603 state
604 .update(cx, |state, cx| state.set_api_key(None, cx))?
605 .await
606 })
607 .detach_and_log_err(cx);
608 }
609
610 fn render_api_key_editor(&self, cx: &mut Context<Self>) -> impl IntoElement {
611 let settings = ThemeSettings::get_global(cx);
612 let text_style = TextStyle {
613 color: cx.theme().colors().text,
614 font_family: settings.ui_font.family.clone(),
615 font_features: settings.ui_font.features.clone(),
616 font_fallbacks: settings.ui_font.fallbacks.clone(),
617 font_size: rems(0.875).into(),
618 font_weight: settings.ui_font.weight,
619 font_style: FontStyle::Normal,
620 line_height: relative(1.3),
621 background_color: None,
622 underline: None,
623 strikethrough: None,
624 white_space: WhiteSpace::Normal,
625 ..Default::default()
626 };
627 EditorElement::new(
628 &self.api_key_editor,
629 EditorStyle {
630 background: cx.theme().colors().editor_background,
631 local_player: cx.theme().players().local(),
632 text: text_style,
633 ..Default::default()
634 },
635 )
636 }
637
638 fn should_render_editor(&self, cx: &mut Context<Self>) -> bool {
639 !self.state.read(cx).is_authenticated()
640 }
641}
642
643impl Render for ConfigurationView {
644 fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
645 let env_var_set = self.state.read(cx).api_key_state.is_from_env_var();
646
647 if self.load_credentials_task.is_some() {
648 div().child(Label::new("Loading credentials...")).into_any()
649 } else if self.should_render_editor(cx) {
650 v_flex()
651 .size_full()
652 .on_action(cx.listener(Self::save_api_key))
653 .child(Label::new("To use DeepSeek in Zed, you need an API key:"))
654 .child(
655 List::new()
656 .child(InstructionListItem::new(
657 "Get your API key from the",
658 Some("DeepSeek console"),
659 Some("https://platform.deepseek.com/api_keys"),
660 ))
661 .child(InstructionListItem::text_only(
662 "Paste your API key below and hit enter to start using the assistant",
663 )),
664 )
665 .child(
666 h_flex()
667 .w_full()
668 .my_2()
669 .px_2()
670 .py_1()
671 .bg(cx.theme().colors().editor_background)
672 .border_1()
673 .border_color(cx.theme().colors().border)
674 .rounded_sm()
675 .child(self.render_api_key_editor(cx)),
676 )
677 .child(
678 Label::new(format!(
679 "Or set the {API_KEY_ENV_VAR_NAME} environment variable."
680 ))
681 .size(LabelSize::Small)
682 .color(Color::Muted),
683 )
684 .into_any()
685 } else {
686 h_flex()
687 .mt_1()
688 .p_1()
689 .justify_between()
690 .rounded_md()
691 .border_1()
692 .border_color(cx.theme().colors().border)
693 .bg(cx.theme().colors().background)
694 .child(
695 h_flex()
696 .gap_1()
697 .child(Icon::new(IconName::Check).color(Color::Success))
698 .child(Label::new(if env_var_set {
699 format!("API key set in {API_KEY_ENV_VAR_NAME}")
700 } else {
701 "API key configured".to_string()
702 })),
703 )
704 .child(
705 Button::new("reset-key", "Reset Key")
706 .label_size(LabelSize::Small)
707 .icon(Some(IconName::Trash))
708 .icon_size(IconSize::Small)
709 .icon_position(IconPosition::Start)
710 .disabled(env_var_set)
711 .on_click(
712 cx.listener(|this, _, window, cx| this.reset_api_key(window, cx)),
713 ),
714 )
715 .into_any()
716 }
717 }
718}