1use anyhow::{Result, anyhow};
2use collections::{BTreeMap, HashMap};
3use deepseek::DEEPSEEK_API_URL;
4
5use futures::Stream;
6use futures::{FutureExt, StreamExt, future::BoxFuture, stream::BoxStream};
7use gpui::{AnyView, App, AsyncApp, Context, Entity, SharedString, Task, Window};
8use http_client::HttpClient;
9use language_model::{
10 ApiKeyState, AuthenticateError, EnvVar, IconOrSvg, LanguageModel, LanguageModelCompletionError,
11 LanguageModelCompletionEvent, LanguageModelId, LanguageModelName, LanguageModelProvider,
12 LanguageModelProviderId, LanguageModelProviderName, LanguageModelProviderState,
13 LanguageModelRequest, LanguageModelToolChoice, LanguageModelToolResultContent,
14 LanguageModelToolUse, MessageContent, RateLimiter, Role, StopReason, TokenUsage, env_var,
15};
16pub use settings::DeepseekAvailableModel as AvailableModel;
17use settings::{Settings, SettingsStore};
18use std::pin::Pin;
19use std::sync::{Arc, LazyLock};
20
21use ui::{ButtonLink, ConfiguredApiCard, List, ListBulletItem, prelude::*};
22use ui_input::InputField;
23use util::ResultExt;
24
25use crate::provider::util::{fix_streamed_json, parse_tool_arguments};
26
27const PROVIDER_ID: LanguageModelProviderId = LanguageModelProviderId::new("deepseek");
28const PROVIDER_NAME: LanguageModelProviderName = LanguageModelProviderName::new("DeepSeek");
29
30const API_KEY_ENV_VAR_NAME: &str = "DEEPSEEK_API_KEY";
31static API_KEY_ENV_VAR: LazyLock<EnvVar> = env_var!(API_KEY_ENV_VAR_NAME);
32
33#[derive(Default)]
34struct RawToolCall {
35 id: String,
36 name: String,
37 arguments: String,
38}
39
40#[derive(Default, Clone, Debug, PartialEq)]
41pub struct DeepSeekSettings {
42 pub api_url: String,
43 pub available_models: Vec<AvailableModel>,
44}
45pub struct DeepSeekLanguageModelProvider {
46 http_client: Arc<dyn HttpClient>,
47 state: Entity<State>,
48}
49
50pub struct State {
51 api_key_state: ApiKeyState,
52}
53
54impl State {
55 fn is_authenticated(&self) -> bool {
56 self.api_key_state.has_key()
57 }
58
59 fn set_api_key(&mut self, api_key: Option<String>, cx: &mut Context<Self>) -> Task<Result<()>> {
60 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
61 self.api_key_state
62 .store(api_url, api_key, |this| &mut this.api_key_state, cx)
63 }
64
65 fn authenticate(&mut self, cx: &mut Context<Self>) -> Task<Result<(), AuthenticateError>> {
66 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
67 self.api_key_state
68 .load_if_needed(api_url, |this| &mut this.api_key_state, cx)
69 }
70}
71
72impl DeepSeekLanguageModelProvider {
73 pub fn new(http_client: Arc<dyn HttpClient>, cx: &mut App) -> Self {
74 let state = cx.new(|cx| {
75 cx.observe_global::<SettingsStore>(|this: &mut State, cx| {
76 let api_url = Self::api_url(cx);
77 this.api_key_state
78 .handle_url_change(api_url, |this| &mut this.api_key_state, cx);
79 cx.notify();
80 })
81 .detach();
82 State {
83 api_key_state: ApiKeyState::new(Self::api_url(cx), (*API_KEY_ENV_VAR).clone()),
84 }
85 });
86
87 Self { http_client, state }
88 }
89
90 fn create_language_model(&self, model: deepseek::Model) -> Arc<dyn LanguageModel> {
91 Arc::new(DeepSeekLanguageModel {
92 id: LanguageModelId::from(model.id().to_string()),
93 model,
94 state: self.state.clone(),
95 http_client: self.http_client.clone(),
96 request_limiter: RateLimiter::new(4),
97 })
98 }
99
100 fn settings(cx: &App) -> &DeepSeekSettings {
101 &crate::AllLanguageModelSettings::get_global(cx).deepseek
102 }
103
104 fn api_url(cx: &App) -> SharedString {
105 let api_url = &Self::settings(cx).api_url;
106 if api_url.is_empty() {
107 DEEPSEEK_API_URL.into()
108 } else {
109 SharedString::new(api_url.as_str())
110 }
111 }
112}
113
114impl LanguageModelProviderState for DeepSeekLanguageModelProvider {
115 type ObservableEntity = State;
116
117 fn observable_entity(&self) -> Option<Entity<Self::ObservableEntity>> {
118 Some(self.state.clone())
119 }
120}
121
122impl LanguageModelProvider for DeepSeekLanguageModelProvider {
123 fn id(&self) -> LanguageModelProviderId {
124 PROVIDER_ID
125 }
126
127 fn name(&self) -> LanguageModelProviderName {
128 PROVIDER_NAME
129 }
130
131 fn icon(&self) -> IconOrSvg {
132 IconOrSvg::Icon(IconName::AiDeepSeek)
133 }
134
135 fn default_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
136 Some(self.create_language_model(deepseek::Model::default()))
137 }
138
139 fn default_fast_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
140 Some(self.create_language_model(deepseek::Model::default_fast()))
141 }
142
143 fn provided_models(&self, cx: &App) -> Vec<Arc<dyn LanguageModel>> {
144 let mut models = BTreeMap::default();
145
146 models.insert("deepseek-chat", deepseek::Model::Chat);
147 models.insert("deepseek-reasoner", deepseek::Model::Reasoner);
148
149 for available_model in &Self::settings(cx).available_models {
150 models.insert(
151 &available_model.name,
152 deepseek::Model::Custom {
153 name: available_model.name.clone(),
154 display_name: available_model.display_name.clone(),
155 max_tokens: available_model.max_tokens,
156 max_output_tokens: available_model.max_output_tokens,
157 },
158 );
159 }
160
161 models
162 .into_values()
163 .map(|model| self.create_language_model(model))
164 .collect()
165 }
166
167 fn is_authenticated(&self, cx: &App) -> bool {
168 self.state.read(cx).is_authenticated()
169 }
170
171 fn authenticate(&self, cx: &mut App) -> Task<Result<(), AuthenticateError>> {
172 self.state.update(cx, |state, cx| state.authenticate(cx))
173 }
174
175 fn configuration_view(
176 &self,
177 _target_agent: language_model::ConfigurationViewTargetAgent,
178 window: &mut Window,
179 cx: &mut App,
180 ) -> AnyView {
181 cx.new(|cx| ConfigurationView::new(self.state.clone(), window, cx))
182 .into()
183 }
184
185 fn reset_credentials(&self, cx: &mut App) -> Task<Result<()>> {
186 self.state
187 .update(cx, |state, cx| state.set_api_key(None, cx))
188 }
189}
190
191pub struct DeepSeekLanguageModel {
192 id: LanguageModelId,
193 model: deepseek::Model,
194 state: Entity<State>,
195 http_client: Arc<dyn HttpClient>,
196 request_limiter: RateLimiter,
197}
198
199impl DeepSeekLanguageModel {
200 fn stream_completion(
201 &self,
202 request: deepseek::Request,
203 cx: &AsyncApp,
204 ) -> BoxFuture<'static, Result<BoxStream<'static, Result<deepseek::StreamResponse>>>> {
205 let http_client = self.http_client.clone();
206
207 let (api_key, api_url) = self.state.read_with(cx, |state, cx| {
208 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
209 (state.api_key_state.key(&api_url), api_url)
210 });
211
212 let future = self.request_limiter.stream(async move {
213 let Some(api_key) = api_key else {
214 return Err(LanguageModelCompletionError::NoApiKey {
215 provider: PROVIDER_NAME,
216 });
217 };
218 let request =
219 deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
220 let response = request.await?;
221 Ok(response)
222 });
223
224 async move { Ok(future.await?.boxed()) }.boxed()
225 }
226}
227
228impl LanguageModel for DeepSeekLanguageModel {
229 fn id(&self) -> LanguageModelId {
230 self.id.clone()
231 }
232
233 fn name(&self) -> LanguageModelName {
234 LanguageModelName::from(self.model.display_name().to_string())
235 }
236
237 fn provider_id(&self) -> LanguageModelProviderId {
238 PROVIDER_ID
239 }
240
241 fn provider_name(&self) -> LanguageModelProviderName {
242 PROVIDER_NAME
243 }
244
245 fn supports_tools(&self) -> bool {
246 true
247 }
248
249 fn supports_streaming_tools(&self) -> bool {
250 true
251 }
252
253 fn supports_tool_choice(&self, _choice: LanguageModelToolChoice) -> bool {
254 true
255 }
256
257 fn supports_images(&self) -> bool {
258 false
259 }
260
261 fn telemetry_id(&self) -> String {
262 format!("deepseek/{}", self.model.id())
263 }
264
265 fn max_token_count(&self) -> u64 {
266 self.model.max_token_count()
267 }
268
269 fn max_output_tokens(&self) -> Option<u64> {
270 self.model.max_output_tokens()
271 }
272
273 fn count_tokens(
274 &self,
275 request: LanguageModelRequest,
276 cx: &App,
277 ) -> BoxFuture<'static, Result<u64>> {
278 cx.background_spawn(async move {
279 let messages = request
280 .messages
281 .into_iter()
282 .map(|message| tiktoken_rs::ChatCompletionRequestMessage {
283 role: match message.role {
284 Role::User => "user".into(),
285 Role::Assistant => "assistant".into(),
286 Role::System => "system".into(),
287 },
288 content: Some(message.string_contents()),
289 name: None,
290 function_call: None,
291 })
292 .collect::<Vec<_>>();
293
294 tiktoken_rs::num_tokens_from_messages("gpt-4", &messages).map(|tokens| tokens as u64)
295 })
296 .boxed()
297 }
298
299 fn stream_completion(
300 &self,
301 request: LanguageModelRequest,
302 cx: &AsyncApp,
303 ) -> BoxFuture<
304 'static,
305 Result<
306 BoxStream<'static, Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>,
307 LanguageModelCompletionError,
308 >,
309 > {
310 let request = into_deepseek(request, &self.model, self.max_output_tokens());
311 let stream = self.stream_completion(request, cx);
312
313 async move {
314 let mapper = DeepSeekEventMapper::new();
315 Ok(mapper.map_stream(stream.await?).boxed())
316 }
317 .boxed()
318 }
319}
320
321pub fn into_deepseek(
322 request: LanguageModelRequest,
323 model: &deepseek::Model,
324 max_output_tokens: Option<u64>,
325) -> deepseek::Request {
326 let is_reasoner = model == &deepseek::Model::Reasoner;
327
328 let mut messages = Vec::new();
329 let mut current_reasoning: Option<String> = None;
330
331 for message in request.messages {
332 for content in message.content {
333 match content {
334 MessageContent::Text(text) => {
335 let should_add = if message.role == Role::User {
336 !text.trim().is_empty()
337 } else {
338 !text.is_empty()
339 };
340
341 if should_add {
342 messages.push(match message.role {
343 Role::User => deepseek::RequestMessage::User { content: text },
344 Role::Assistant => deepseek::RequestMessage::Assistant {
345 content: Some(text),
346 tool_calls: Vec::new(),
347 reasoning_content: current_reasoning.take(),
348 },
349 Role::System => deepseek::RequestMessage::System { content: text },
350 });
351 }
352 }
353 MessageContent::Thinking { text, .. } => {
354 // Accumulate reasoning content for next assistant message
355 current_reasoning.get_or_insert_default().push_str(&text);
356 }
357 MessageContent::RedactedThinking(_) => {}
358 MessageContent::Image(_) => {}
359 MessageContent::ToolUse(tool_use) => {
360 let tool_call = deepseek::ToolCall {
361 id: tool_use.id.to_string(),
362 content: deepseek::ToolCallContent::Function {
363 function: deepseek::FunctionContent {
364 name: tool_use.name.to_string(),
365 arguments: serde_json::to_string(&tool_use.input)
366 .unwrap_or_default(),
367 },
368 },
369 };
370
371 if let Some(deepseek::RequestMessage::Assistant { tool_calls, .. }) =
372 messages.last_mut()
373 {
374 tool_calls.push(tool_call);
375 } else {
376 messages.push(deepseek::RequestMessage::Assistant {
377 content: None,
378 tool_calls: vec![tool_call],
379 reasoning_content: current_reasoning.take(),
380 });
381 }
382 }
383 MessageContent::ToolResult(tool_result) => {
384 match &tool_result.content {
385 LanguageModelToolResultContent::Text(text) => {
386 messages.push(deepseek::RequestMessage::Tool {
387 content: text.to_string(),
388 tool_call_id: tool_result.tool_use_id.to_string(),
389 });
390 }
391 LanguageModelToolResultContent::Image(_) => {}
392 };
393 }
394 }
395 }
396 }
397
398 deepseek::Request {
399 model: model.id().to_string(),
400 messages,
401 stream: true,
402 max_tokens: max_output_tokens,
403 temperature: if is_reasoner {
404 None
405 } else {
406 request.temperature
407 },
408 response_format: None,
409 tools: request
410 .tools
411 .into_iter()
412 .map(|tool| deepseek::ToolDefinition::Function {
413 function: deepseek::FunctionDefinition {
414 name: tool.name,
415 description: Some(tool.description),
416 parameters: Some(tool.input_schema),
417 },
418 })
419 .collect(),
420 }
421}
422
423pub struct DeepSeekEventMapper {
424 tool_calls_by_index: HashMap<usize, RawToolCall>,
425}
426
427impl DeepSeekEventMapper {
428 pub fn new() -> Self {
429 Self {
430 tool_calls_by_index: HashMap::default(),
431 }
432 }
433
434 pub fn map_stream(
435 mut self,
436 events: Pin<Box<dyn Send + Stream<Item = Result<deepseek::StreamResponse>>>>,
437 ) -> impl Stream<Item = Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>
438 {
439 events.flat_map(move |event| {
440 futures::stream::iter(match event {
441 Ok(event) => self.map_event(event),
442 Err(error) => vec![Err(LanguageModelCompletionError::from(error))],
443 })
444 })
445 }
446
447 pub fn map_event(
448 &mut self,
449 event: deepseek::StreamResponse,
450 ) -> Vec<Result<LanguageModelCompletionEvent, LanguageModelCompletionError>> {
451 let Some(choice) = event.choices.first() else {
452 return vec![Err(LanguageModelCompletionError::from(anyhow!(
453 "Response contained no choices"
454 )))];
455 };
456
457 let mut events = Vec::new();
458 if let Some(content) = choice.delta.content.clone()
459 && !content.is_empty()
460 {
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 if !entry.id.is_empty() && !entry.name.is_empty() {
490 if let Ok(input) = serde_json::from_str::<serde_json::Value>(
491 &fix_streamed_json(&entry.arguments),
492 ) {
493 events.push(Ok(LanguageModelCompletionEvent::ToolUse(
494 LanguageModelToolUse {
495 id: entry.id.clone().into(),
496 name: entry.name.as_str().into(),
497 is_input_complete: false,
498 input,
499 raw_input: entry.arguments.clone(),
500 thought_signature: None,
501 },
502 )));
503 }
504 }
505 }
506 }
507
508 if let Some(usage) = event.usage {
509 events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
510 input_tokens: usage.prompt_tokens,
511 output_tokens: usage.completion_tokens,
512 cache_creation_input_tokens: 0,
513 cache_read_input_tokens: 0,
514 })));
515 }
516
517 match choice.finish_reason.as_deref() {
518 Some("stop") => {
519 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
520 }
521 Some("tool_calls") => {
522 events.extend(self.tool_calls_by_index.drain().map(|(_, tool_call)| {
523 match parse_tool_arguments(&tool_call.arguments) {
524 Ok(input) => Ok(LanguageModelCompletionEvent::ToolUse(
525 LanguageModelToolUse {
526 id: tool_call.id.clone().into(),
527 name: tool_call.name.as_str().into(),
528 is_input_complete: true,
529 input,
530 raw_input: tool_call.arguments.clone(),
531 thought_signature: None,
532 },
533 )),
534 Err(error) => Ok(LanguageModelCompletionEvent::ToolUseJsonParseError {
535 id: tool_call.id.clone().into(),
536 tool_name: tool_call.name.as_str().into(),
537 raw_input: tool_call.arguments.into(),
538 json_parse_error: error.to_string(),
539 }),
540 }
541 }));
542
543 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::ToolUse)));
544 }
545 Some(stop_reason) => {
546 log::error!("Unexpected DeepSeek stop_reason: {stop_reason:?}",);
547 events.push(Ok(LanguageModelCompletionEvent::Stop(StopReason::EndTurn)));
548 }
549 None => {}
550 }
551
552 events
553 }
554}
555
556struct ConfigurationView {
557 api_key_editor: Entity<InputField>,
558 state: Entity<State>,
559 load_credentials_task: Option<Task<()>>,
560}
561
562impl ConfigurationView {
563 fn new(state: Entity<State>, window: &mut Window, cx: &mut Context<Self>) -> Self {
564 let api_key_editor =
565 cx.new(|cx| InputField::new(window, cx, "sk-00000000000000000000000000000000"));
566
567 cx.observe(&state, |_, _, cx| {
568 cx.notify();
569 })
570 .detach();
571
572 let load_credentials_task = Some(cx.spawn({
573 let state = state.clone();
574 async move |this, cx| {
575 if let Some(task) = Some(state.update(cx, |state, cx| state.authenticate(cx))) {
576 let _ = task.await;
577 }
578
579 this.update(cx, |this, cx| {
580 this.load_credentials_task = None;
581 cx.notify();
582 })
583 .log_err();
584 }
585 }));
586
587 Self {
588 api_key_editor,
589 state,
590 load_credentials_task,
591 }
592 }
593
594 fn save_api_key(&mut self, _: &menu::Confirm, _window: &mut Window, cx: &mut Context<Self>) {
595 let api_key = self.api_key_editor.read(cx).text(cx).trim().to_string();
596 if api_key.is_empty() {
597 return;
598 }
599
600 let state = self.state.clone();
601 cx.spawn(async move |_, cx| {
602 state
603 .update(cx, |state, cx| state.set_api_key(Some(api_key), cx))
604 .await
605 })
606 .detach_and_log_err(cx);
607 }
608
609 fn reset_api_key(&mut self, window: &mut Window, cx: &mut Context<Self>) {
610 self.api_key_editor
611 .update(cx, |editor, cx| editor.set_text("", window, cx));
612
613 let state = self.state.clone();
614 cx.spawn(async move |_, cx| {
615 state
616 .update(cx, |state, cx| state.set_api_key(None, cx))
617 .await
618 })
619 .detach_and_log_err(cx);
620 }
621
622 fn should_render_editor(&self, cx: &mut Context<Self>) -> bool {
623 !self.state.read(cx).is_authenticated()
624 }
625}
626
627impl Render for ConfigurationView {
628 fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
629 let env_var_set = self.state.read(cx).api_key_state.is_from_env_var();
630 let configured_card_label = if env_var_set {
631 format!("API key set in {API_KEY_ENV_VAR_NAME} environment variable")
632 } else {
633 let api_url = DeepSeekLanguageModelProvider::api_url(cx);
634 if api_url == DEEPSEEK_API_URL {
635 "API key configured".to_string()
636 } else {
637 format!("API key configured for {}", api_url)
638 }
639 };
640
641 if self.load_credentials_task.is_some() {
642 div()
643 .child(Label::new("Loading credentials..."))
644 .into_any_element()
645 } else if self.should_render_editor(cx) {
646 v_flex()
647 .size_full()
648 .on_action(cx.listener(Self::save_api_key))
649 .child(Label::new("To use DeepSeek in Zed, you need an API key:"))
650 .child(
651 List::new()
652 .child(
653 ListBulletItem::new("")
654 .child(Label::new("Get your API key from the"))
655 .child(ButtonLink::new(
656 "DeepSeek console",
657 "https://platform.deepseek.com/api_keys",
658 )),
659 )
660 .child(ListBulletItem::new(
661 "Paste your API key below and hit enter to start using the assistant",
662 )),
663 )
664 .child(self.api_key_editor.clone())
665 .child(
666 Label::new(format!(
667 "You can also set the {API_KEY_ENV_VAR_NAME} environment variable and restart Zed."
668 ))
669 .size(LabelSize::Small)
670 .color(Color::Muted),
671 )
672 .into_any_element()
673 } else {
674 ConfiguredApiCard::new(configured_card_label)
675 .disabled(env_var_set)
676 .on_click(cx.listener(|this, _, window, cx| this.reset_api_key(window, cx)))
677 .into_any_element()
678 }
679 }
680}