1use anyhow::{Result, anyhow};
2use collections::{BTreeMap, HashMap};
3use deepseek::DEEPSEEK_API_URL;
4
5use futures::Stream;
6use futures::{FutureExt, StreamExt, future, future::BoxFuture, stream::BoxStream};
7use gpui::{AnyView, App, AsyncApp, Context, Entity, SharedString, Task, Window};
8use http_client::HttpClient;
9use language_model::{
10 AuthenticateError, LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent,
11 LanguageModelId, LanguageModelName, LanguageModelProvider, LanguageModelProviderId,
12 LanguageModelProviderName, LanguageModelProviderState, LanguageModelRequest,
13 LanguageModelToolChoice, LanguageModelToolResultContent, LanguageModelToolUse, MessageContent,
14 RateLimiter, Role, StopReason, TokenUsage,
15};
16pub use settings::DeepseekAvailableModel as AvailableModel;
17use settings::{Settings, SettingsStore};
18use std::pin::Pin;
19use std::str::FromStr;
20use std::sync::{Arc, LazyLock};
21
22use ui::{List, prelude::*};
23use ui_input::InputField;
24use util::ResultExt;
25use zed_env_vars::{EnvVar, env_var};
26
27use crate::ui::ConfiguredApiCard;
28use crate::{api_key::ApiKeyState, ui::InstructionListItem};
29
30const PROVIDER_ID: LanguageModelProviderId = LanguageModelProviderId::new("deepseek");
31const PROVIDER_NAME: LanguageModelProviderName = LanguageModelProviderName::new("DeepSeek");
32
33const API_KEY_ENV_VAR_NAME: &str = "DEEPSEEK_API_KEY";
34static API_KEY_ENV_VAR: LazyLock<EnvVar> = env_var!(API_KEY_ENV_VAR_NAME);
35
36#[derive(Default)]
37struct RawToolCall {
38 id: String,
39 name: String,
40 arguments: String,
41}
42
43#[derive(Default, Clone, Debug, PartialEq)]
44pub struct DeepSeekSettings {
45 pub api_url: String,
46 pub available_models: Vec<AvailableModel>,
47}
48pub struct DeepSeekLanguageModelProvider {
49 http_client: Arc<dyn HttpClient>,
50 state: Entity<State>,
51}
52
53pub struct State {
54 api_key_state: ApiKeyState,
55}
56
57impl State {
58 fn is_authenticated(&self) -> bool {
59 self.api_key_state.has_key()
60 }
61
62 fn set_api_key(&mut self, api_key: Option<String>, cx: &mut Context<Self>) -> Task<Result<()>> {
63 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
64 self.api_key_state
65 .store(api_url, api_key, |this| &mut this.api_key_state, cx)
66 }
67
68 fn authenticate(&mut self, cx: &mut Context<Self>) -> Task<Result<(), AuthenticateError>> {
69 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
70 self.api_key_state.load_if_needed(
71 api_url,
72 &API_KEY_ENV_VAR,
73 |this| &mut this.api_key_state,
74 cx,
75 )
76 }
77}
78
79impl DeepSeekLanguageModelProvider {
80 pub fn new(http_client: Arc<dyn HttpClient>, cx: &mut App) -> Self {
81 let state = cx.new(|cx| {
82 cx.observe_global::<SettingsStore>(|this: &mut State, cx| {
83 let api_url = Self::api_url(cx);
84 this.api_key_state.handle_url_change(
85 api_url,
86 &API_KEY_ENV_VAR,
87 |this| &mut this.api_key_state,
88 cx,
89 );
90 cx.notify();
91 })
92 .detach();
93 State {
94 api_key_state: ApiKeyState::new(Self::api_url(cx)),
95 }
96 });
97
98 Self { http_client, state }
99 }
100
101 fn create_language_model(&self, model: deepseek::Model) -> Arc<dyn LanguageModel> {
102 Arc::new(DeepSeekLanguageModel {
103 id: LanguageModelId::from(model.id().to_string()),
104 model,
105 state: self.state.clone(),
106 http_client: self.http_client.clone(),
107 request_limiter: RateLimiter::new(4),
108 })
109 }
110
111 fn settings(cx: &App) -> &DeepSeekSettings {
112 &crate::AllLanguageModelSettings::get_global(cx).deepseek
113 }
114
115 fn api_url(cx: &App) -> SharedString {
116 let api_url = &Self::settings(cx).api_url;
117 if api_url.is_empty() {
118 DEEPSEEK_API_URL.into()
119 } else {
120 SharedString::new(api_url.as_str())
121 }
122 }
123}
124
125impl LanguageModelProviderState for DeepSeekLanguageModelProvider {
126 type ObservableEntity = State;
127
128 fn observable_entity(&self) -> Option<Entity<Self::ObservableEntity>> {
129 Some(self.state.clone())
130 }
131}
132
133impl LanguageModelProvider for DeepSeekLanguageModelProvider {
134 fn id(&self) -> LanguageModelProviderId {
135 PROVIDER_ID
136 }
137
138 fn name(&self) -> LanguageModelProviderName {
139 PROVIDER_NAME
140 }
141
142 fn icon(&self) -> IconName {
143 IconName::AiDeepSeek
144 }
145
146 fn default_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
147 Some(self.create_language_model(deepseek::Model::default()))
148 }
149
150 fn default_fast_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
151 Some(self.create_language_model(deepseek::Model::default_fast()))
152 }
153
154 fn provided_models(&self, cx: &App) -> Vec<Arc<dyn LanguageModel>> {
155 let mut models = BTreeMap::default();
156
157 models.insert("deepseek-chat", deepseek::Model::Chat);
158 models.insert("deepseek-reasoner", deepseek::Model::Reasoner);
159
160 for available_model in &Self::settings(cx).available_models {
161 models.insert(
162 &available_model.name,
163 deepseek::Model::Custom {
164 name: available_model.name.clone(),
165 display_name: available_model.display_name.clone(),
166 max_tokens: available_model.max_tokens,
167 max_output_tokens: available_model.max_output_tokens,
168 },
169 );
170 }
171
172 models
173 .into_values()
174 .map(|model| self.create_language_model(model))
175 .collect()
176 }
177
178 fn is_authenticated(&self, cx: &App) -> bool {
179 self.state.read(cx).is_authenticated()
180 }
181
182 fn authenticate(&self, cx: &mut App) -> Task<Result<(), AuthenticateError>> {
183 self.state.update(cx, |state, cx| state.authenticate(cx))
184 }
185
186 fn configuration_view(
187 &self,
188 _target_agent: language_model::ConfigurationViewTargetAgent,
189 window: &mut Window,
190 cx: &mut App,
191 ) -> AnyView {
192 cx.new(|cx| ConfigurationView::new(self.state.clone(), window, cx))
193 .into()
194 }
195
196 fn reset_credentials(&self, cx: &mut App) -> Task<Result<()>> {
197 self.state
198 .update(cx, |state, cx| state.set_api_key(None, cx))
199 }
200}
201
202pub struct DeepSeekLanguageModel {
203 id: LanguageModelId,
204 model: deepseek::Model,
205 state: Entity<State>,
206 http_client: Arc<dyn HttpClient>,
207 request_limiter: RateLimiter,
208}
209
210impl DeepSeekLanguageModel {
211 fn stream_completion(
212 &self,
213 request: deepseek::Request,
214 cx: &AsyncApp,
215 ) -> BoxFuture<'static, Result<BoxStream<'static, Result<deepseek::StreamResponse>>>> {
216 let http_client = self.http_client.clone();
217
218 let Ok((api_key, api_url)) = self.state.read_with(cx, |state, cx| {
219 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
220 (state.api_key_state.key(&api_url), api_url)
221 }) else {
222 return future::ready(Err(anyhow!("App state dropped"))).boxed();
223 };
224
225 let future = self.request_limiter.stream(async move {
226 let Some(api_key) = api_key else {
227 return Err(LanguageModelCompletionError::NoApiKey {
228 provider: PROVIDER_NAME,
229 });
230 };
231 let request =
232 deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
233 let response = request.await?;
234 Ok(response)
235 });
236
237 async move { Ok(future.await?.boxed()) }.boxed()
238 }
239}
240
241impl LanguageModel for DeepSeekLanguageModel {
242 fn id(&self) -> LanguageModelId {
243 self.id.clone()
244 }
245
246 fn name(&self) -> LanguageModelName {
247 LanguageModelName::from(self.model.display_name().to_string())
248 }
249
250 fn provider_id(&self) -> LanguageModelProviderId {
251 PROVIDER_ID
252 }
253
254 fn provider_name(&self) -> LanguageModelProviderName {
255 PROVIDER_NAME
256 }
257
258 fn supports_tools(&self) -> bool {
259 true
260 }
261
262 fn supports_tool_choice(&self, _choice: LanguageModelToolChoice) -> bool {
263 true
264 }
265
266 fn supports_images(&self) -> bool {
267 false
268 }
269
270 fn telemetry_id(&self) -> String {
271 format!("deepseek/{}", self.model.id())
272 }
273
274 fn max_token_count(&self) -> u64 {
275 self.model.max_token_count()
276 }
277
278 fn max_output_tokens(&self) -> Option<u64> {
279 self.model.max_output_tokens()
280 }
281
282 fn count_tokens(
283 &self,
284 request: LanguageModelRequest,
285 cx: &App,
286 ) -> BoxFuture<'static, Result<u64>> {
287 cx.background_spawn(async move {
288 let messages = request
289 .messages
290 .into_iter()
291 .map(|message| tiktoken_rs::ChatCompletionRequestMessage {
292 role: match message.role {
293 Role::User => "user".into(),
294 Role::Assistant => "assistant".into(),
295 Role::System => "system".into(),
296 },
297 content: Some(message.string_contents()),
298 name: None,
299 function_call: None,
300 })
301 .collect::<Vec<_>>();
302
303 tiktoken_rs::num_tokens_from_messages("gpt-4", &messages).map(|tokens| tokens as u64)
304 })
305 .boxed()
306 }
307
308 fn stream_completion(
309 &self,
310 request: LanguageModelRequest,
311 cx: &AsyncApp,
312 ) -> BoxFuture<
313 'static,
314 Result<
315 BoxStream<'static, Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>,
316 LanguageModelCompletionError,
317 >,
318 > {
319 let request = into_deepseek(request, &self.model, self.max_output_tokens());
320 let stream = self.stream_completion(request, cx);
321
322 async move {
323 let mapper = DeepSeekEventMapper::new();
324 Ok(mapper.map_stream(stream.await?).boxed())
325 }
326 .boxed()
327 }
328}
329
330pub fn into_deepseek(
331 request: LanguageModelRequest,
332 model: &deepseek::Model,
333 max_output_tokens: Option<u64>,
334) -> deepseek::Request {
335 let is_reasoner = model == &deepseek::Model::Reasoner;
336
337 let mut messages = Vec::new();
338 let mut current_reasoning: Option<String> = None;
339
340 for message in request.messages {
341 for content in message.content {
342 match content {
343 MessageContent::Text(text) => messages.push(match message.role {
344 Role::User => deepseek::RequestMessage::User { content: text },
345 Role::Assistant => deepseek::RequestMessage::Assistant {
346 content: Some(text),
347 tool_calls: Vec::new(),
348 reasoning_content: current_reasoning.take(),
349 },
350 Role::System => deepseek::RequestMessage::System { content: text },
351 }),
352 MessageContent::Thinking { text, .. } => {
353 // Accumulate reasoning content for next assistant message
354 current_reasoning.get_or_insert_default().push_str(&text);
355 }
356 MessageContent::RedactedThinking(_) => {}
357 MessageContent::Image(_) => {}
358 MessageContent::ToolUse(tool_use) => {
359 let tool_call = deepseek::ToolCall {
360 id: tool_use.id.to_string(),
361 content: deepseek::ToolCallContent::Function {
362 function: deepseek::FunctionContent {
363 name: tool_use.name.to_string(),
364 arguments: serde_json::to_string(&tool_use.input)
365 .unwrap_or_default(),
366 },
367 },
368 };
369
370 if let Some(deepseek::RequestMessage::Assistant { tool_calls, .. }) =
371 messages.last_mut()
372 {
373 tool_calls.push(tool_call);
374 } else {
375 messages.push(deepseek::RequestMessage::Assistant {
376 content: None,
377 tool_calls: vec![tool_call],
378 reasoning_content: current_reasoning.take(),
379 });
380 }
381 }
382 MessageContent::ToolResult(tool_result) => {
383 match &tool_result.content {
384 LanguageModelToolResultContent::Text(text) => {
385 messages.push(deepseek::RequestMessage::Tool {
386 content: text.to_string(),
387 tool_call_id: tool_result.tool_use_id.to_string(),
388 });
389 }
390 LanguageModelToolResultContent::Image(_) => {}
391 };
392 }
393 }
394 }
395 }
396
397 deepseek::Request {
398 model: model.id().to_string(),
399 messages,
400 stream: true,
401 max_tokens: max_output_tokens,
402 temperature: if is_reasoner {
403 None
404 } else {
405 request.temperature
406 },
407 response_format: None,
408 tools: request
409 .tools
410 .into_iter()
411 .map(|tool| deepseek::ToolDefinition::Function {
412 function: deepseek::FunctionDefinition {
413 name: tool.name,
414 description: Some(tool.description),
415 parameters: Some(tool.input_schema),
416 },
417 })
418 .collect(),
419 }
420}
421
422pub struct DeepSeekEventMapper {
423 tool_calls_by_index: HashMap<usize, RawToolCall>,
424}
425
426impl DeepSeekEventMapper {
427 pub fn new() -> Self {
428 Self {
429 tool_calls_by_index: HashMap::default(),
430 }
431 }
432
433 pub fn map_stream(
434 mut self,
435 events: Pin<Box<dyn Send + Stream<Item = Result<deepseek::StreamResponse>>>>,
436 ) -> impl Stream<Item = Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>
437 {
438 events.flat_map(move |event| {
439 futures::stream::iter(match event {
440 Ok(event) => self.map_event(event),
441 Err(error) => vec![Err(LanguageModelCompletionError::from(error))],
442 })
443 })
444 }
445
446 pub fn map_event(
447 &mut self,
448 event: deepseek::StreamResponse,
449 ) -> Vec<Result<LanguageModelCompletionEvent, LanguageModelCompletionError>> {
450 let Some(choice) = event.choices.first() else {
451 return vec![Err(LanguageModelCompletionError::from(anyhow!(
452 "Response contained no choices"
453 )))];
454 };
455
456 let mut events = Vec::new();
457 if let Some(content) = choice.delta.content.clone() {
458 events.push(Ok(LanguageModelCompletionEvent::Text(content)));
459 }
460
461 if let Some(reasoning_content) = choice.delta.reasoning_content.clone() {
462 events.push(Ok(LanguageModelCompletionEvent::Thinking {
463 text: reasoning_content,
464 signature: None,
465 }));
466 }
467
468 if let Some(tool_calls) = choice.delta.tool_calls.as_ref() {
469 for tool_call in tool_calls {
470 let entry = self.tool_calls_by_index.entry(tool_call.index).or_default();
471
472 if let Some(tool_id) = tool_call.id.clone() {
473 entry.id = tool_id;
474 }
475
476 if let Some(function) = tool_call.function.as_ref() {
477 if let Some(name) = function.name.clone() {
478 entry.name = name;
479 }
480
481 if let Some(arguments) = function.arguments.clone() {
482 entry.arguments.push_str(&arguments);
483 }
484 }
485 }
486 }
487
488 if let Some(usage) = event.usage {
489 events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
490 input_tokens: usage.prompt_tokens,
491 output_tokens: usage.completion_tokens,
492 cache_creation_input_tokens: 0,
493 cache_read_input_tokens: 0,
494 })));
495 }
496
497 match choice.finish_reason.as_deref() {
498 Some("stop") => {
499 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
500 }
501 Some("tool_calls") => {
502 events.extend(self.tool_calls_by_index.drain().map(|(_, tool_call)| {
503 match serde_json::Value::from_str(&tool_call.arguments) {
504 Ok(input) => Ok(LanguageModelCompletionEvent::ToolUse(
505 LanguageModelToolUse {
506 id: tool_call.id.clone().into(),
507 name: tool_call.name.as_str().into(),
508 is_input_complete: true,
509 input,
510 raw_input: tool_call.arguments.clone(),
511 thought_signature: None,
512 },
513 )),
514 Err(error) => Ok(LanguageModelCompletionEvent::ToolUseJsonParseError {
515 id: tool_call.id.clone().into(),
516 tool_name: tool_call.name.as_str().into(),
517 raw_input: tool_call.arguments.into(),
518 json_parse_error: error.to_string(),
519 }),
520 }
521 }));
522
523 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::ToolUse)));
524 }
525 Some(stop_reason) => {
526 log::error!("Unexpected DeepSeek stop_reason: {stop_reason:?}",);
527 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
528 }
529 None => {}
530 }
531
532 events
533 }
534}
535
536struct ConfigurationView {
537 api_key_editor: Entity<InputField>,
538 state: Entity<State>,
539 load_credentials_task: Option<Task<()>>,
540}
541
542impl ConfigurationView {
543 fn new(state: Entity<State>, window: &mut Window, cx: &mut Context<Self>) -> Self {
544 let api_key_editor =
545 cx.new(|cx| InputField::new(window, cx, "sk-00000000000000000000000000000000"));
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 should_render_editor(&self, cx: &mut Context<Self>) -> bool {
606 !self.state.read(cx).is_authenticated()
607 }
608}
609
610impl Render for ConfigurationView {
611 fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
612 let env_var_set = self.state.read(cx).api_key_state.is_from_env_var();
613 let configured_card_label = if env_var_set {
614 format!("API key set in {API_KEY_ENV_VAR_NAME} environment variable")
615 } else {
616 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
617 if api_url == DEEPSEEK_API_URL {
618 "API key configured".to_string()
619 } else {
620 format!("API key configured for {}", api_url)
621 }
622 };
623
624 if self.load_credentials_task.is_some() {
625 div()
626 .child(Label::new("Loading credentials..."))
627 .into_any_element()
628 } else if self.should_render_editor(cx) {
629 v_flex()
630 .size_full()
631 .on_action(cx.listener(Self::save_api_key))
632 .child(Label::new("To use DeepSeek in Zed, you need an API key:"))
633 .child(
634 List::new()
635 .child(InstructionListItem::new(
636 "Get your API key from the",
637 Some("DeepSeek console"),
638 Some("https://platform.deepseek.com/api_keys"),
639 ))
640 .child(InstructionListItem::text_only(
641 "Paste your API key below and hit enter to start using the assistant",
642 )),
643 )
644 .child(self.api_key_editor.clone())
645 .child(
646 Label::new(format!(
647 "Or set the {API_KEY_ENV_VAR_NAME} environment variable."
648 ))
649 .size(LabelSize::Small)
650 .color(Color::Muted),
651 )
652 .into_any_element()
653 } else {
654 ConfiguredApiCard::new(configured_card_label)
655 .disabled(env_var_set)
656 .on_click(cx.listener(|this, _, window, cx| this.reset_api_key(window, cx)))
657 .into_any_element()
658 }
659 }
660}