use anyhow::{anyhow, Context as _, Result};use collections::BTreeMap;use credentials_provider::CredentialsProvider;use editor::{Editor, EditorElement, EditorStyle};use futures::{future::BoxFuture, stream::BoxStream, FutureExt, StreamExt};use gpui::{    AnyView, AppContext as _, AsyncApp, Entity, FontStyle, Subscription, Task, TextStyle,    WhiteSpace,};use http_client::HttpClient;use language_model::{    AuthenticateError, LanguageModel, LanguageModelCompletionEvent, LanguageModelId,    LanguageModelName, LanguageModelProvider, LanguageModelProviderId, LanguageModelProviderName,    LanguageModelProviderState, LanguageModelRequest, RateLimiter, Role,};use schemars::JsonSchema;use serde::{Deserialize, Serialize};use settings::{Settings, SettingsStore};use std::sync::Arc;use theme::ThemeSettings;use ui::{prelude::*, Icon, IconName, List};use util::ResultExt; use crate::{ui::InstructionListItem, AllLanguageModelSettings}; const PROVIDER_ID: &str = "deepseek";const PROVIDER_NAME: &str = "DeepSeek";const DEEPSEEK_API_KEY_VAR: &str = "DEEPSEEK_API_KEY"; #[derive(Default, Clone, Debug, PartialEq)]pub struct DeepSeekSettings {    pub api_url: String,    pub available_models: Vec<AvailableModel>,} #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, JsonSchema)]pub struct AvailableModel {    pub name: String,    pub display_name: Option<String>,    pub max_tokens: usize,    pub max_output_tokens: Option<u32>,} pub struct DeepSeekLanguageModelProvider {    http_client: Arc<dyn HttpClient>,    state: Entity<State>,} pub struct State {    api_key: Option<String>,    api_key_from_env: bool,    _subscription: Subscription,} impl State {    fn is_authenticated(&self) -> bool {        self.api_key.is_some()    }     fn reset_api_key(&self, cx: &mut Context<Self>) -> Task<Result<()>> {        let credentials_provider = <dyn CredentialsProvider>::global(cx);        let api_url = AllLanguageModelSettings::get_global(cx)            .deepseek            .api_url            .clone();        cx.spawn(|this, mut cx| async move {            credentials_provider                .delete_credentials(&api_url, &cx)                .await                .log_err();            this.update(&mut cx, |this, cx| {                this.api_key = None;                this.api_key_from_env = false;                cx.notify();            })        })    }     fn set_api_key(&mut self, api_key: String, cx: &mut Context<Self>) -> Task<Result<()>> {        let credentials_provider = <dyn CredentialsProvider>::global(cx);        let api_url = AllLanguageModelSettings::get_global(cx)            .deepseek            .api_url            .clone();        cx.spawn(|this, mut cx| async move {            credentials_provider                .write_credentials(&api_url, "Bearer", api_key.as_bytes(), &cx)                .await?;            this.update(&mut cx, |this, cx| {                this.api_key = Some(api_key);                cx.notify();            })        })    }     fn authenticate(&self, cx: &mut Context<Self>) -> Task<Result<(), AuthenticateError>> {        if self.is_authenticated() {            return Task::ready(Ok(()));        }         let credentials_provider = <dyn CredentialsProvider>::global(cx);        let api_url = AllLanguageModelSettings::get_global(cx)            .deepseek            .api_url            .clone();        cx.spawn(|this, mut cx| async move {            let (api_key, from_env) = if let Ok(api_key) = std::env::var(DEEPSEEK_API_KEY_VAR) {                (api_key, true)            } else {                let (_, api_key) = credentials_provider                    .read_credentials(&api_url, &cx)                    .await?                    .ok_or(AuthenticateError::CredentialsNotFound)?;                (                    String::from_utf8(api_key).context("invalid {PROVIDER_NAME} API key")?,                    false,                )            };             this.update(&mut cx, |this, cx| {                this.api_key = Some(api_key);                this.api_key_from_env = from_env;                cx.notify();            })?;             Ok(())        })    }} impl DeepSeekLanguageModelProvider {    pub fn new(http_client: Arc<dyn HttpClient>, cx: &mut App) -> Self {        let state = cx.new(|cx| State {            api_key: None,            api_key_from_env: false,            _subscription: cx.observe_global::<SettingsStore>(|_this: &mut State, cx| {                cx.notify();            }),        });         Self { http_client, state }    }} impl LanguageModelProviderState for DeepSeekLanguageModelProvider {    type ObservableEntity = State;     fn observable_entity(&self) -> Option<Entity<Self::ObservableEntity>> {        Some(self.state.clone())    }} impl LanguageModelProvider for DeepSeekLanguageModelProvider {    fn id(&self) -> LanguageModelProviderId {        LanguageModelProviderId(PROVIDER_ID.into())    }     fn name(&self) -> LanguageModelProviderName {        LanguageModelProviderName(PROVIDER_NAME.into())    }     fn icon(&self) -> IconName {        IconName::AiDeepSeek    }     fn default_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {        let model = deepseek::Model::Chat;        Some(Arc::new(DeepSeekLanguageModel {            id: LanguageModelId::from(model.id().to_string()),            model,            state: self.state.clone(),            http_client: self.http_client.clone(),            request_limiter: RateLimiter::new(4),        }))    }     fn provided_models(&self, cx: &App) -> Vec<Arc<dyn LanguageModel>> {        let mut models = BTreeMap::default();         models.insert("deepseek-chat", deepseek::Model::Chat);        models.insert("deepseek-reasoner", deepseek::Model::Reasoner);         for available_model in AllLanguageModelSettings::get_global(cx)            .deepseek            .available_models            .iter()        {            models.insert(                &available_model.name,                deepseek::Model::Custom {                    name: available_model.name.clone(),                    display_name: available_model.display_name.clone(),                    max_tokens: available_model.max_tokens,                    max_output_tokens: available_model.max_output_tokens,                },            );        }         models            .into_values()            .map(|model| {                Arc::new(DeepSeekLanguageModel {                    id: LanguageModelId::from(model.id().to_string()),                    model,                    state: self.state.clone(),                    http_client: self.http_client.clone(),                    request_limiter: RateLimiter::new(4),                }) as Arc<dyn LanguageModel>            })            .collect()    }     fn is_authenticated(&self, cx: &App) -> bool {        self.state.read(cx).is_authenticated()    }     fn authenticate(&self, cx: &mut App) -> Task<Result<(), AuthenticateError>> {        self.state.update(cx, |state, cx| state.authenticate(cx))    }     fn configuration_view(&self, window: &mut Window, cx: &mut App) -> AnyView {        cx.new(|cx| ConfigurationView::new(self.state.clone(), window, cx))            .into()    }     fn reset_credentials(&self, cx: &mut App) -> Task<Result<()>> {        self.state.update(cx, |state, cx| state.reset_api_key(cx))    }} pub struct DeepSeekLanguageModel {    id: LanguageModelId,    model: deepseek::Model,    state: Entity<State>,    http_client: Arc<dyn HttpClient>,    request_limiter: RateLimiter,} impl DeepSeekLanguageModel {    fn stream_completion(        &self,        request: deepseek::Request,        cx: &AsyncApp,    ) -> BoxFuture<'static, Result<BoxStream<'static, Result<deepseek::StreamResponse>>>> {        let http_client = self.http_client.clone();        let Ok((api_key, api_url)) = cx.read_entity(&self.state, |state, cx| {            let settings = &AllLanguageModelSettings::get_global(cx).deepseek;            (state.api_key.clone(), settings.api_url.clone())        }) else {            return futures::future::ready(Err(anyhow!("App state dropped"))).boxed();        };         let future = self.request_limiter.stream(async move {            let api_key = api_key.ok_or_else(|| anyhow!("Missing DeepSeek API Key"))?;            let request =                deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);            let response = request.await?;            Ok(response)        });         async move { Ok(future.await?.boxed()) }.boxed()    }} impl LanguageModel for DeepSeekLanguageModel {    fn id(&self) -> LanguageModelId {        self.id.clone()    }     fn name(&self) -> LanguageModelName {        LanguageModelName::from(self.model.display_name().to_string())    }     fn provider_id(&self) -> LanguageModelProviderId {        LanguageModelProviderId(PROVIDER_ID.into())    }     fn provider_name(&self) -> LanguageModelProviderName {        LanguageModelProviderName(PROVIDER_NAME.into())    }     fn telemetry_id(&self) -> String {        format!("deepseek/{}", self.model.id())    }     fn max_token_count(&self) -> usize {        self.model.max_token_count()    }     fn max_output_tokens(&self) -> Option<u32> {        self.model.max_output_tokens()    }     fn count_tokens(        &self,        request: LanguageModelRequest,        cx: &App,    ) -> BoxFuture<'static, Result<usize>> {        cx.background_spawn(async move {            let messages = request                .messages                .into_iter()                .map(|message| tiktoken_rs::ChatCompletionRequestMessage {                    role: match message.role {                        Role::User => "user".into(),                        Role::Assistant => "assistant".into(),                        Role::System => "system".into(),                    },                    content: Some(message.string_contents()),                    name: None,                    function_call: None,                })                .collect::<Vec<_>>();             tiktoken_rs::num_tokens_from_messages("gpt-4", &messages)        })        .boxed()    }     fn stream_completion(        &self,        request: LanguageModelRequest,        cx: &AsyncApp,    ) -> BoxFuture<'static, Result<BoxStream<'static, Result<LanguageModelCompletionEvent>>>> {        let request = into_deepseek(            request,            self.model.id().to_string(),            self.max_output_tokens(),        );        let stream = self.stream_completion(request, cx);         async move {            let stream = stream.await?;            Ok(stream                .map(|result| {                    result.and_then(|response| {                        response                            .choices                            .first()                            .ok_or_else(|| anyhow!("Empty response"))                            .map(|choice| {                                choice                                    .delta                                    .content                                    .clone()                                    .unwrap_or_default()                                    .map(LanguageModelCompletionEvent::Text)                            })                    })                })                .boxed())        }        .boxed()    }     fn use_any_tool(        &self,        request: LanguageModelRequest,        name: String,        description: String,        schema: serde_json::Value,        cx: &AsyncApp,    ) -> BoxFuture<'static, Result<futures::stream::BoxStream<'static, Result<String>>>> {        let mut deepseek_request = into_deepseek(            request,            self.model.id().to_string(),            self.max_output_tokens(),        );         deepseek_request.tools = vec![deepseek::ToolDefinition::Function {            function: deepseek::FunctionDefinition {                name: name.clone(),                description: Some(description),                parameters: Some(schema),            },        }];         let response_stream = self.stream_completion(deepseek_request, cx);         self.request_limiter            .run(async move {                let stream = response_stream.await?;                 let tool_args_stream = stream                    .filter_map(move |response| async move {                        match response {                            Ok(response) => {                                for choice in response.choices {                                    if let Some(tool_calls) = choice.delta.tool_calls {                                        for tool_call in tool_calls {                                            if let Some(function) = tool_call.function {                                                if let Some(args) = function.arguments {                                                    return Some(Ok(args));                                                }                                            }                                        }                                    }                                }                                None                            }                            Err(e) => Some(Err(e)),                        }                    })                    .boxed();                 Ok(tool_args_stream)            })            .boxed()    }} pub fn into_deepseek(    request: LanguageModelRequest,    model: String,    max_output_tokens: Option<u32>,) -> deepseek::Request {    let is_reasoner = model == "deepseek-reasoner";     let len = request.messages.len();    let merged_messages =        request            .messages            .into_iter()            .fold(Vec::with_capacity(len), |mut acc, msg| {                let role = msg.role;                let content = msg.string_contents();                 if is_reasoner {                    if let Some(last_msg) = acc.last_mut() {                        match (last_msg, role) {                            (deepseek::RequestMessage::User { content: last }, Role::User) => {                                last.push(' ');                                last.push_str(&content);                                return acc;                            }                             (                                deepseek::RequestMessage::Assistant {                                    content: last_content,                                    ..                                },                                Role::Assistant,                            ) => {                                *last_content = last_content                                    .take()                                    .map(|c| {                                        let mut s =                                            String::with_capacity(c.len() + content.len() + 1);                                        s.push_str(&c);                                        s.push(' ');                                        s.push_str(&content);                                        s                                    })                                    .or(Some(content));                                 return acc;                            }                            _ => {}                        }                    }                }                 acc.push(match role {                    Role::User => deepseek::RequestMessage::User { content },                    Role::Assistant => deepseek::RequestMessage::Assistant {                        content: Some(content),                        tool_calls: Vec::new(),                    },                    Role::System => deepseek::RequestMessage::System { content },                });                acc            });     deepseek::Request {        model,        messages: merged_messages,        stream: true,        max_tokens: max_output_tokens,        temperature: if is_reasoner {            None        } else {            request.temperature        },        response_format: None,        tools: request            .tools            .into_iter()            .map(|tool| deepseek::ToolDefinition::Function {                function: deepseek::FunctionDefinition {                    name: tool.name,                    description: Some(tool.description),                    parameters: Some(tool.input_schema),                },            })            .collect(),    }} struct ConfigurationView {    api_key_editor: Entity<Editor>,

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