1use anyhow::{anyhow, Result};
  2use collections::BTreeMap;
  3use editor::{Editor, EditorElement, EditorStyle};
  4use futures::{future::BoxFuture, FutureExt, StreamExt};
  5use google_ai::stream_generate_content;
  6use gpui::{
  7    AnyView, AppContext, AsyncAppContext, FontStyle, ModelContext, Subscription, Task, TextStyle,
  8    View, WhiteSpace,
  9};
 10use http_client::HttpClient;
 11use language_model::LanguageModelCompletionEvent;
 12use language_model::{
 13    LanguageModel, LanguageModelId, LanguageModelName, LanguageModelProvider,
 14    LanguageModelProviderId, LanguageModelProviderName, LanguageModelProviderState,
 15    LanguageModelRequest, RateLimiter,
 16};
 17use schemars::JsonSchema;
 18use serde::{Deserialize, Serialize};
 19use settings::{Settings, SettingsStore};
 20use std::{future, sync::Arc};
 21use strum::IntoEnumIterator;
 22use theme::ThemeSettings;
 23use ui::{prelude::*, Icon, IconName, Tooltip};
 24use util::ResultExt;
 25
 26use crate::AllLanguageModelSettings;
 27
 28const PROVIDER_ID: &str = "google";
 29const PROVIDER_NAME: &str = "Google AI";
 30
 31#[derive(Default, Clone, Debug, PartialEq)]
 32pub struct GoogleSettings {
 33    pub api_url: String,
 34    pub available_models: Vec<AvailableModel>,
 35}
 36
 37#[derive(Clone, Debug, PartialEq, Serialize, Deserialize, JsonSchema)]
 38pub struct AvailableModel {
 39    name: String,
 40    display_name: Option<String>,
 41    max_tokens: usize,
 42}
 43
 44pub struct GoogleLanguageModelProvider {
 45    http_client: Arc<dyn HttpClient>,
 46    state: gpui::Model<State>,
 47}
 48
 49pub struct State {
 50    api_key: Option<String>,
 51    api_key_from_env: bool,
 52    _subscription: Subscription,
 53}
 54
 55const GOOGLE_AI_API_KEY_VAR: &str = "GOOGLE_AI_API_KEY";
 56
 57impl State {
 58    fn is_authenticated(&self) -> bool {
 59        self.api_key.is_some()
 60    }
 61
 62    fn reset_api_key(&self, cx: &mut ModelContext<Self>) -> Task<Result<()>> {
 63        let delete_credentials =
 64            cx.delete_credentials(&AllLanguageModelSettings::get_global(cx).google.api_url);
 65        cx.spawn(|this, mut cx| async move {
 66            delete_credentials.await.ok();
 67            this.update(&mut cx, |this, cx| {
 68                this.api_key = None;
 69                this.api_key_from_env = false;
 70                cx.notify();
 71            })
 72        })
 73    }
 74
 75    fn set_api_key(&mut self, api_key: String, cx: &mut ModelContext<Self>) -> Task<Result<()>> {
 76        let settings = &AllLanguageModelSettings::get_global(cx).google;
 77        let write_credentials =
 78            cx.write_credentials(&settings.api_url, "Bearer", api_key.as_bytes());
 79
 80        cx.spawn(|this, mut cx| async move {
 81            write_credentials.await?;
 82            this.update(&mut cx, |this, cx| {
 83                this.api_key = Some(api_key);
 84                cx.notify();
 85            })
 86        })
 87    }
 88
 89    fn authenticate(&self, cx: &mut ModelContext<Self>) -> Task<Result<()>> {
 90        if self.is_authenticated() {
 91            Task::ready(Ok(()))
 92        } else {
 93            let api_url = AllLanguageModelSettings::get_global(cx)
 94                .google
 95                .api_url
 96                .clone();
 97
 98            cx.spawn(|this, mut cx| async move {
 99                let (api_key, from_env) = if let Ok(api_key) = std::env::var(GOOGLE_AI_API_KEY_VAR)
100                {
101                    (api_key, true)
102                } else {
103                    let (_, api_key) = cx
104                        .update(|cx| cx.read_credentials(&api_url))?
105                        .await?
106                        .ok_or_else(|| anyhow!("credentials not found"))?;
107                    (String::from_utf8(api_key)?, false)
108                };
109
110                this.update(&mut cx, |this, cx| {
111                    this.api_key = Some(api_key);
112                    this.api_key_from_env = from_env;
113                    cx.notify();
114                })
115            })
116        }
117    }
118}
119
120impl GoogleLanguageModelProvider {
121    pub fn new(http_client: Arc<dyn HttpClient>, cx: &mut AppContext) -> Self {
122        let state = cx.new_model(|cx| State {
123            api_key: None,
124            api_key_from_env: false,
125            _subscription: cx.observe_global::<SettingsStore>(|_, cx| {
126                cx.notify();
127            }),
128        });
129
130        Self { http_client, state }
131    }
132}
133
134impl LanguageModelProviderState for GoogleLanguageModelProvider {
135    type ObservableEntity = State;
136
137    fn observable_entity(&self) -> Option<gpui::Model<Self::ObservableEntity>> {
138        Some(self.state.clone())
139    }
140}
141
142impl LanguageModelProvider for GoogleLanguageModelProvider {
143    fn id(&self) -> LanguageModelProviderId {
144        LanguageModelProviderId(PROVIDER_ID.into())
145    }
146
147    fn name(&self) -> LanguageModelProviderName {
148        LanguageModelProviderName(PROVIDER_NAME.into())
149    }
150
151    fn icon(&self) -> IconName {
152        IconName::AiGoogle
153    }
154
155    fn provided_models(&self, cx: &AppContext) -> Vec<Arc<dyn LanguageModel>> {
156        let mut models = BTreeMap::default();
157
158        // Add base models from google_ai::Model::iter()
159        for model in google_ai::Model::iter() {
160            if !matches!(model, google_ai::Model::Custom { .. }) {
161                models.insert(model.id().to_string(), model);
162            }
163        }
164
165        // Override with available models from settings
166        for model in &AllLanguageModelSettings::get_global(cx)
167            .google
168            .available_models
169        {
170            models.insert(
171                model.name.clone(),
172                google_ai::Model::Custom {
173                    name: model.name.clone(),
174                    display_name: model.display_name.clone(),
175                    max_tokens: model.max_tokens,
176                },
177            );
178        }
179
180        models
181            .into_values()
182            .map(|model| {
183                Arc::new(GoogleLanguageModel {
184                    id: LanguageModelId::from(model.id().to_string()),
185                    model,
186                    state: self.state.clone(),
187                    http_client: self.http_client.clone(),
188                    rate_limiter: RateLimiter::new(4),
189                }) as Arc<dyn LanguageModel>
190            })
191            .collect()
192    }
193
194    fn is_authenticated(&self, cx: &AppContext) -> bool {
195        self.state.read(cx).is_authenticated()
196    }
197
198    fn authenticate(&self, cx: &mut AppContext) -> Task<Result<()>> {
199        self.state.update(cx, |state, cx| state.authenticate(cx))
200    }
201
202    fn configuration_view(&self, cx: &mut WindowContext) -> AnyView {
203        cx.new_view(|cx| ConfigurationView::new(self.state.clone(), cx))
204            .into()
205    }
206
207    fn reset_credentials(&self, cx: &mut AppContext) -> Task<Result<()>> {
208        let state = self.state.clone();
209        let delete_credentials =
210            cx.delete_credentials(&AllLanguageModelSettings::get_global(cx).google.api_url);
211        cx.spawn(|mut cx| async move {
212            delete_credentials.await.log_err();
213            state.update(&mut cx, |this, cx| {
214                this.api_key = None;
215                cx.notify();
216            })
217        })
218    }
219}
220
221pub struct GoogleLanguageModel {
222    id: LanguageModelId,
223    model: google_ai::Model,
224    state: gpui::Model<State>,
225    http_client: Arc<dyn HttpClient>,
226    rate_limiter: RateLimiter,
227}
228
229impl LanguageModel for GoogleLanguageModel {
230    fn id(&self) -> LanguageModelId {
231        self.id.clone()
232    }
233
234    fn name(&self) -> LanguageModelName {
235        LanguageModelName::from(self.model.display_name().to_string())
236    }
237
238    fn provider_id(&self) -> LanguageModelProviderId {
239        LanguageModelProviderId(PROVIDER_ID.into())
240    }
241
242    fn provider_name(&self) -> LanguageModelProviderName {
243        LanguageModelProviderName(PROVIDER_NAME.into())
244    }
245
246    fn telemetry_id(&self) -> String {
247        format!("google/{}", self.model.id())
248    }
249
250    fn max_token_count(&self) -> usize {
251        self.model.max_token_count()
252    }
253
254    fn count_tokens(
255        &self,
256        request: LanguageModelRequest,
257        cx: &AppContext,
258    ) -> BoxFuture<'static, Result<usize>> {
259        let request = request.into_google(self.model.id().to_string());
260        let http_client = self.http_client.clone();
261        let api_key = self.state.read(cx).api_key.clone();
262
263        let settings = &AllLanguageModelSettings::get_global(cx).google;
264        let api_url = settings.api_url.clone();
265
266        async move {
267            let api_key = api_key.ok_or_else(|| anyhow!("Missing Google API key"))?;
268            let response = google_ai::count_tokens(
269                http_client.as_ref(),
270                &api_url,
271                &api_key,
272                google_ai::CountTokensRequest {
273                    contents: request.contents,
274                },
275            )
276            .await?;
277            Ok(response.total_tokens)
278        }
279        .boxed()
280    }
281
282    fn stream_completion(
283        &self,
284        request: LanguageModelRequest,
285        cx: &AsyncAppContext,
286    ) -> BoxFuture<
287        'static,
288        Result<futures::stream::BoxStream<'static, Result<LanguageModelCompletionEvent>>>,
289    > {
290        let request = request.into_google(self.model.id().to_string());
291
292        let http_client = self.http_client.clone();
293        let Ok((api_key, api_url)) = cx.read_model(&self.state, |state, cx| {
294            let settings = &AllLanguageModelSettings::get_global(cx).google;
295            (state.api_key.clone(), settings.api_url.clone())
296        }) else {
297            return futures::future::ready(Err(anyhow!("App state dropped"))).boxed();
298        };
299
300        let future = self.rate_limiter.stream(async move {
301            let api_key = api_key.ok_or_else(|| anyhow!("Missing Google API Key"))?;
302            let response =
303                stream_generate_content(http_client.as_ref(), &api_url, &api_key, request);
304            let events = response.await?;
305            Ok(google_ai::extract_text_from_events(events).boxed())
306        });
307        async move {
308            Ok(future
309                .await?
310                .map(|result| result.map(LanguageModelCompletionEvent::Text))
311                .boxed())
312        }
313        .boxed()
314    }
315
316    fn use_any_tool(
317        &self,
318        _request: LanguageModelRequest,
319        _name: String,
320        _description: String,
321        _schema: serde_json::Value,
322        _cx: &AsyncAppContext,
323    ) -> BoxFuture<'static, Result<futures::stream::BoxStream<'static, Result<String>>>> {
324        future::ready(Err(anyhow!("not implemented"))).boxed()
325    }
326}
327
328struct ConfigurationView {
329    api_key_editor: View<Editor>,
330    state: gpui::Model<State>,
331    load_credentials_task: Option<Task<()>>,
332}
333
334impl ConfigurationView {
335    fn new(state: gpui::Model<State>, cx: &mut ViewContext<Self>) -> Self {
336        cx.observe(&state, |_, _, cx| {
337            cx.notify();
338        })
339        .detach();
340
341        let load_credentials_task = Some(cx.spawn({
342            let state = state.clone();
343            |this, mut cx| async move {
344                if let Some(task) = state
345                    .update(&mut cx, |state, cx| state.authenticate(cx))
346                    .log_err()
347                {
348                    // We don't log an error, because "not signed in" is also an error.
349                    let _ = task.await;
350                }
351                this.update(&mut cx, |this, cx| {
352                    this.load_credentials_task = None;
353                    cx.notify();
354                })
355                .log_err();
356            }
357        }));
358
359        Self {
360            api_key_editor: cx.new_view(|cx| {
361                let mut editor = Editor::single_line(cx);
362                editor.set_placeholder_text("AIzaSy...", cx);
363                editor
364            }),
365            state,
366            load_credentials_task,
367        }
368    }
369
370    fn save_api_key(&mut self, _: &menu::Confirm, cx: &mut ViewContext<Self>) {
371        let api_key = self.api_key_editor.read(cx).text(cx);
372        if api_key.is_empty() {
373            return;
374        }
375
376        let state = self.state.clone();
377        cx.spawn(|_, mut cx| async move {
378            state
379                .update(&mut cx, |state, cx| state.set_api_key(api_key, cx))?
380                .await
381        })
382        .detach_and_log_err(cx);
383
384        cx.notify();
385    }
386
387    fn reset_api_key(&mut self, cx: &mut ViewContext<Self>) {
388        self.api_key_editor
389            .update(cx, |editor, cx| editor.set_text("", cx));
390
391        let state = self.state.clone();
392        cx.spawn(|_, mut cx| async move {
393            state
394                .update(&mut cx, |state, cx| state.reset_api_key(cx))?
395                .await
396        })
397        .detach_and_log_err(cx);
398
399        cx.notify();
400    }
401
402    fn render_api_key_editor(&self, cx: &mut ViewContext<Self>) -> impl IntoElement {
403        let settings = ThemeSettings::get_global(cx);
404        let text_style = TextStyle {
405            color: cx.theme().colors().text,
406            font_family: settings.ui_font.family.clone(),
407            font_features: settings.ui_font.features.clone(),
408            font_fallbacks: settings.ui_font.fallbacks.clone(),
409            font_size: rems(0.875).into(),
410            font_weight: settings.ui_font.weight,
411            font_style: FontStyle::Normal,
412            line_height: relative(1.3),
413            background_color: None,
414            underline: None,
415            strikethrough: None,
416            white_space: WhiteSpace::Normal,
417            truncate: None,
418        };
419        EditorElement::new(
420            &self.api_key_editor,
421            EditorStyle {
422                background: cx.theme().colors().editor_background,
423                local_player: cx.theme().players().local(),
424                text: text_style,
425                ..Default::default()
426            },
427        )
428    }
429
430    fn should_render_editor(&self, cx: &mut ViewContext<Self>) -> bool {
431        !self.state.read(cx).is_authenticated()
432    }
433}
434
435impl Render for ConfigurationView {
436    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
437        const GOOGLE_CONSOLE_URL: &str = "https://aistudio.google.com/app/apikey";
438        const INSTRUCTIONS: [&str; 3] = [
439            "To use Zed's assistant with Google AI, you need to add an API key. Follow these steps:",
440            "- Create one by visiting:",
441            "- Paste your API key below and hit enter to use the assistant",
442        ];
443
444        let env_var_set = self.state.read(cx).api_key_from_env;
445
446        if self.load_credentials_task.is_some() {
447            div().child(Label::new("Loading credentials...")).into_any()
448        } else if self.should_render_editor(cx) {
449            v_flex()
450                .size_full()
451                .on_action(cx.listener(Self::save_api_key))
452                .child(Label::new(INSTRUCTIONS[0]))
453                .child(h_flex().child(Label::new(INSTRUCTIONS[1])).child(
454                    Button::new("google_console", GOOGLE_CONSOLE_URL)
455                        .style(ButtonStyle::Subtle)
456                        .icon(IconName::ExternalLink)
457                        .icon_size(IconSize::XSmall)
458                        .icon_color(Color::Muted)
459                        .on_click(move |_, cx| cx.open_url(GOOGLE_CONSOLE_URL))
460                    )
461                )
462                .child(Label::new(INSTRUCTIONS[2]))
463                .child(
464                    h_flex()
465                        .w_full()
466                        .my_2()
467                        .px_2()
468                        .py_1()
469                        .bg(cx.theme().colors().editor_background)
470                        .rounded_md()
471                        .child(self.render_api_key_editor(cx)),
472                )
473                .child(
474                    Label::new(
475                        format!("You can also assign the {GOOGLE_AI_API_KEY_VAR} environment variable and restart Zed."),
476                    )
477                    .size(LabelSize::Small),
478                )
479                .into_any()
480        } else {
481            h_flex()
482                .size_full()
483                .justify_between()
484                .child(
485                    h_flex()
486                        .gap_1()
487                        .child(Icon::new(IconName::Check).color(Color::Success))
488                        .child(Label::new(if env_var_set {
489                            format!("API key set in {GOOGLE_AI_API_KEY_VAR} environment variable.")
490                        } else {
491                            "API key configured.".to_string()
492                        })),
493                )
494                .child(
495                    Button::new("reset-key", "Reset key")
496                        .icon(Some(IconName::Trash))
497                        .icon_size(IconSize::Small)
498                        .icon_position(IconPosition::Start)
499                        .disabled(env_var_set)
500                        .when(env_var_set, |this| {
501                            this.tooltip(|cx| Tooltip::text(format!("To reset your API key, unset the {GOOGLE_AI_API_KEY_VAR} environment variable."), cx))
502                        })
503                        .on_click(cx.listener(|this, _, cx| this.reset_api_key(cx))),
504                )
505                .into_any()
506        }
507    }
508}