1use anyhow::{Result, anyhow};
2use collections::{BTreeMap, HashMap};
3use editor::{Editor, EditorElement, EditorStyle};
4use futures::Stream;
5use futures::{FutureExt, StreamExt, future, 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::{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 &crate::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 Ok((api_key, api_url)) = self.state.read_with(cx, |state, cx| {
224 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
225 (state.api_key_state.key(api_url), api_url.to_string())
226 }) else {
227 return future::ready(Err(anyhow!("App state dropped"))).boxed();
228 };
229
230 let future = self.request_limiter.stream(async move {
231 let Some(api_key) = api_key else {
232 return Err(LanguageModelCompletionError::NoApiKey {
233 provider: PROVIDER_NAME,
234 });
235 };
236 let request =
237 deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
238 let response = request.await?;
239 Ok(response)
240 });
241
242 async move { Ok(future.await?.boxed()) }.boxed()
243 }
244}
245
246impl LanguageModel for DeepSeekLanguageModel {
247 fn id(&self) -> LanguageModelId {
248 self.id.clone()
249 }
250
251 fn name(&self) -> LanguageModelName {
252 LanguageModelName::from(self.model.display_name().to_string())
253 }
254
255 fn provider_id(&self) -> LanguageModelProviderId {
256 PROVIDER_ID
257 }
258
259 fn provider_name(&self) -> LanguageModelProviderName {
260 PROVIDER_NAME
261 }
262
263 fn supports_tools(&self) -> bool {
264 true
265 }
266
267 fn supports_tool_choice(&self, _choice: LanguageModelToolChoice) -> bool {
268 true
269 }
270
271 fn supports_images(&self) -> bool {
272 false
273 }
274
275 fn telemetry_id(&self) -> String {
276 format!("deepseek/{}", self.model.id())
277 }
278
279 fn max_token_count(&self) -> u64 {
280 self.model.max_token_count()
281 }
282
283 fn max_output_tokens(&self) -> Option<u64> {
284 self.model.max_output_tokens()
285 }
286
287 fn count_tokens(
288 &self,
289 request: LanguageModelRequest,
290 cx: &App,
291 ) -> BoxFuture<'static, Result<u64>> {
292 cx.background_spawn(async move {
293 let messages = request
294 .messages
295 .into_iter()
296 .map(|message| tiktoken_rs::ChatCompletionRequestMessage {
297 role: match message.role {
298 Role::User => "user".into(),
299 Role::Assistant => "assistant".into(),
300 Role::System => "system".into(),
301 },
302 content: Some(message.string_contents()),
303 name: None,
304 function_call: None,
305 })
306 .collect::<Vec<_>>();
307
308 tiktoken_rs::num_tokens_from_messages("gpt-4", &messages).map(|tokens| tokens as u64)
309 })
310 .boxed()
311 }
312
313 fn stream_completion(
314 &self,
315 request: LanguageModelRequest,
316 cx: &AsyncApp,
317 ) -> BoxFuture<
318 'static,
319 Result<
320 BoxStream<'static, Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>,
321 LanguageModelCompletionError,
322 >,
323 > {
324 let request = into_deepseek(request, &self.model, self.max_output_tokens());
325 let stream = self.stream_completion(request, cx);
326
327 async move {
328 let mapper = DeepSeekEventMapper::new();
329 Ok(mapper.map_stream(stream.await?).boxed())
330 }
331 .boxed()
332 }
333}
334
335pub fn into_deepseek(
336 request: LanguageModelRequest,
337 model: &deepseek::Model,
338 max_output_tokens: Option<u64>,
339) -> deepseek::Request {
340 let is_reasoner = *model == deepseek::Model::Reasoner;
341
342 let mut messages = Vec::new();
343 for message in request.messages {
344 for content in message.content {
345 match content {
346 MessageContent::Text(text) => messages.push(match message.role {
347 Role::User => deepseek::RequestMessage::User { content: text },
348 Role::Assistant => deepseek::RequestMessage::Assistant {
349 content: Some(text),
350 tool_calls: Vec::new(),
351 },
352 Role::System => deepseek::RequestMessage::System { content: text },
353 }),
354 MessageContent::Thinking { .. } => {}
355 MessageContent::RedactedThinking(_) => {}
356 MessageContent::Image(_) => {}
357 MessageContent::ToolUse(tool_use) => {
358 let tool_call = deepseek::ToolCall {
359 id: tool_use.id.to_string(),
360 content: deepseek::ToolCallContent::Function {
361 function: deepseek::FunctionContent {
362 name: tool_use.name.to_string(),
363 arguments: serde_json::to_string(&tool_use.input)
364 .unwrap_or_default(),
365 },
366 },
367 };
368
369 if let Some(deepseek::RequestMessage::Assistant { tool_calls, .. }) =
370 messages.last_mut()
371 {
372 tool_calls.push(tool_call);
373 } else {
374 messages.push(deepseek::RequestMessage::Assistant {
375 content: None,
376 tool_calls: vec![tool_call],
377 });
378 }
379 }
380 MessageContent::ToolResult(tool_result) => {
381 match &tool_result.content {
382 LanguageModelToolResultContent::Text(text) => {
383 messages.push(deepseek::RequestMessage::Tool {
384 content: text.to_string(),
385 tool_call_id: tool_result.tool_use_id.to_string(),
386 });
387 }
388 LanguageModelToolResultContent::Image(_) => {}
389 };
390 }
391 }
392 }
393 }
394
395 deepseek::Request {
396 model: model.id().to_string(),
397 messages,
398 stream: true,
399 max_tokens: max_output_tokens,
400 temperature: if is_reasoner {
401 None
402 } else {
403 request.temperature
404 },
405 response_format: None,
406 tools: request
407 .tools
408 .into_iter()
409 .map(|tool| deepseek::ToolDefinition::Function {
410 function: deepseek::FunctionDefinition {
411 name: tool.name,
412 description: Some(tool.description),
413 parameters: Some(tool.input_schema),
414 },
415 })
416 .collect(),
417 }
418}
419
420pub struct DeepSeekEventMapper {
421 tool_calls_by_index: HashMap<usize, RawToolCall>,
422}
423
424impl DeepSeekEventMapper {
425 pub fn new() -> Self {
426 Self {
427 tool_calls_by_index: HashMap::default(),
428 }
429 }
430
431 pub fn map_stream(
432 mut self,
433 events: Pin<Box<dyn Send + Stream<Item = Result<deepseek::StreamResponse>>>>,
434 ) -> impl Stream<Item = Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>
435 {
436 events.flat_map(move |event| {
437 futures::stream::iter(match event {
438 Ok(event) => self.map_event(event),
439 Err(error) => vec![Err(LanguageModelCompletionError::from(error))],
440 })
441 })
442 }
443
444 pub fn map_event(
445 &mut self,
446 event: deepseek::StreamResponse,
447 ) -> Vec<Result<LanguageModelCompletionEvent, LanguageModelCompletionError>> {
448 let Some(choice) = event.choices.first() else {
449 return vec![Err(LanguageModelCompletionError::from(anyhow!(
450 "Response contained no choices"
451 )))];
452 };
453
454 let mut events = Vec::new();
455 if let Some(content) = choice.delta.content.clone() {
456 events.push(Ok(LanguageModelCompletionEvent::Text(content)));
457 }
458
459 if let Some(reasoning_content) = choice.delta.reasoning_content.clone() {
460 events.push(Ok(LanguageModelCompletionEvent::Thinking {
461 text: reasoning_content,
462 signature: None,
463 }));
464 }
465
466 if let Some(tool_calls) = choice.delta.tool_calls.as_ref() {
467 for tool_call in tool_calls {
468 let entry = self.tool_calls_by_index.entry(tool_call.index).or_default();
469
470 if let Some(tool_id) = tool_call.id.clone() {
471 entry.id = tool_id;
472 }
473
474 if let Some(function) = tool_call.function.as_ref() {
475 if let Some(name) = function.name.clone() {
476 entry.name = name;
477 }
478
479 if let Some(arguments) = function.arguments.clone() {
480 entry.arguments.push_str(&arguments);
481 }
482 }
483 }
484 }
485
486 if let Some(usage) = event.usage {
487 events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
488 input_tokens: usage.prompt_tokens,
489 output_tokens: usage.completion_tokens,
490 cache_creation_input_tokens: 0,
491 cache_read_input_tokens: 0,
492 })));
493 }
494
495 match choice.finish_reason.as_deref() {
496 Some("stop") => {
497 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
498 }
499 Some("tool_calls") => {
500 events.extend(self.tool_calls_by_index.drain().map(|(_, tool_call)| {
501 match serde_json::Value::from_str(&tool_call.arguments) {
502 Ok(input) => Ok(LanguageModelCompletionEvent::ToolUse(
503 LanguageModelToolUse {
504 id: tool_call.id.clone().into(),
505 name: tool_call.name.as_str().into(),
506 is_input_complete: true,
507 input,
508 raw_input: tool_call.arguments.clone(),
509 },
510 )),
511 Err(error) => Ok(LanguageModelCompletionEvent::ToolUseJsonParseError {
512 id: tool_call.id.clone().into(),
513 tool_name: tool_call.name.as_str().into(),
514 raw_input: tool_call.arguments.into(),
515 json_parse_error: error.to_string(),
516 }),
517 }
518 }));
519
520 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::ToolUse)));
521 }
522 Some(stop_reason) => {
523 log::error!("Unexpected DeepSeek stop_reason: {stop_reason:?}",);
524 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
525 }
526 None => {}
527 }
528
529 events
530 }
531}
532
533struct ConfigurationView {
534 api_key_editor: Entity<Editor>,
535 state: Entity<State>,
536 load_credentials_task: Option<Task<()>>,
537}
538
539impl ConfigurationView {
540 fn new(state: Entity<State>, window: &mut Window, cx: &mut Context<Self>) -> Self {
541 let api_key_editor = cx.new(|cx| {
542 let mut editor = Editor::single_line(window, cx);
543 editor.set_placeholder_text("sk-00000000000000000000000000000000", window, cx);
544 editor
545 });
546
547 cx.observe(&state, |_, _, cx| {
548 cx.notify();
549 })
550 .detach();
551
552 let load_credentials_task = Some(cx.spawn({
553 let state = state.clone();
554 async move |this, cx| {
555 if let Some(task) = state
556 .update(cx, |state, cx| state.authenticate(cx))
557 .log_err()
558 {
559 let _ = task.await;
560 }
561
562 this.update(cx, |this, cx| {
563 this.load_credentials_task = None;
564 cx.notify();
565 })
566 .log_err();
567 }
568 }));
569
570 Self {
571 api_key_editor,
572 state,
573 load_credentials_task,
574 }
575 }
576
577 fn save_api_key(&mut self, _: &menu::Confirm, _window: &mut Window, cx: &mut Context<Self>) {
578 let api_key = self.api_key_editor.read(cx).text(cx).trim().to_string();
579 if api_key.is_empty() {
580 return;
581 }
582
583 let state = self.state.clone();
584 cx.spawn(async move |_, cx| {
585 state
586 .update(cx, |state, cx| state.set_api_key(Some(api_key), cx))?
587 .await
588 })
589 .detach_and_log_err(cx);
590 }
591
592 fn reset_api_key(&mut self, window: &mut Window, cx: &mut Context<Self>) {
593 self.api_key_editor
594 .update(cx, |editor, cx| editor.set_text("", window, cx));
595
596 let state = self.state.clone();
597 cx.spawn(async move |_, cx| {
598 state
599 .update(cx, |state, cx| state.set_api_key(None, cx))?
600 .await
601 })
602 .detach_and_log_err(cx);
603 }
604
605 fn render_api_key_editor(&self, cx: &mut Context<Self>) -> impl IntoElement {
606 let settings = ThemeSettings::get_global(cx);
607 let text_style = TextStyle {
608 color: cx.theme().colors().text,
609 font_family: settings.ui_font.family.clone(),
610 font_features: settings.ui_font.features.clone(),
611 font_fallbacks: settings.ui_font.fallbacks.clone(),
612 font_size: rems(0.875).into(),
613 font_weight: settings.ui_font.weight,
614 font_style: FontStyle::Normal,
615 line_height: relative(1.3),
616 background_color: None,
617 underline: None,
618 strikethrough: None,
619 white_space: WhiteSpace::Normal,
620 ..Default::default()
621 };
622 EditorElement::new(
623 &self.api_key_editor,
624 EditorStyle {
625 background: cx.theme().colors().editor_background,
626 local_player: cx.theme().players().local(),
627 text: text_style,
628 ..Default::default()
629 },
630 )
631 }
632
633 fn should_render_editor(&self, cx: &mut Context<Self>) -> bool {
634 !self.state.read(cx).is_authenticated()
635 }
636}
637
638impl Render for ConfigurationView {
639 fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
640 let env_var_set = self.state.read(cx).api_key_state.is_from_env_var();
641
642 if self.load_credentials_task.is_some() {
643 div().child(Label::new("Loading credentials...")).into_any()
644 } else if self.should_render_editor(cx) {
645 v_flex()
646 .size_full()
647 .on_action(cx.listener(Self::save_api_key))
648 .child(Label::new("To use DeepSeek in Zed, you need an API key:"))
649 .child(
650 List::new()
651 .child(InstructionListItem::new(
652 "Get your API key from the",
653 Some("DeepSeek console"),
654 Some("https://platform.deepseek.com/api_keys"),
655 ))
656 .child(InstructionListItem::text_only(
657 "Paste your API key below and hit enter to start using the assistant",
658 )),
659 )
660 .child(
661 h_flex()
662 .w_full()
663 .my_2()
664 .px_2()
665 .py_1()
666 .bg(cx.theme().colors().editor_background)
667 .border_1()
668 .border_color(cx.theme().colors().border)
669 .rounded_sm()
670 .child(self.render_api_key_editor(cx)),
671 )
672 .child(
673 Label::new(format!(
674 "Or set the {API_KEY_ENV_VAR_NAME} environment variable."
675 ))
676 .size(LabelSize::Small)
677 .color(Color::Muted),
678 )
679 .into_any()
680 } else {
681 h_flex()
682 .mt_1()
683 .p_1()
684 .justify_between()
685 .rounded_md()
686 .border_1()
687 .border_color(cx.theme().colors().border)
688 .bg(cx.theme().colors().background)
689 .child(
690 h_flex()
691 .gap_1()
692 .child(Icon::new(IconName::Check).color(Color::Success))
693 .child(Label::new(if env_var_set {
694 format!("API key set in {API_KEY_ENV_VAR_NAME}")
695 } else {
696 "API key configured".to_string()
697 })),
698 )
699 .child(
700 Button::new("reset-key", "Reset Key")
701 .label_size(LabelSize::Small)
702 .icon(Some(IconName::Trash))
703 .icon_size(IconSize::Small)
704 .icon_position(IconPosition::Start)
705 .disabled(env_var_set)
706 .on_click(
707 cx.listener(|this, _, window, cx| this.reset_api_key(window, cx)),
708 ),
709 )
710 .into_any()
711 }
712 }
713}