use crate::inline_prompt_editor::CodegenStatus;use futures::{SinkExt, StreamExt, channel::mpsc};use gpui::{App, AppContext as _, Context, Entity, EventEmitter, Task};use language_model::{ConfiguredModel, LanguageModelRegistry, LanguageModelRequest};use std::time::Instant;use terminal::Terminal;use uuid::Uuid; pub struct TerminalCodegen {    pub status: CodegenStatus,    terminal: Entity<Terminal>,    generation: Task<()>,    pub message_id: Option<String>,    transaction: Option<TerminalTransaction>,    session_id: Uuid,} impl EventEmitter<CodegenEvent> for TerminalCodegen {} impl TerminalCodegen {    pub fn new(terminal: Entity<Terminal>, session_id: Uuid) -> Self {        Self {            terminal,            status: CodegenStatus::Idle,            generation: Task::ready(()),            message_id: None,            transaction: None,            session_id,        }    }     pub fn session_id(&self) -> Uuid {        self.session_id    }     pub fn start(&mut self, prompt_task: Task<LanguageModelRequest>, cx: &mut Context<Self>) {        let Some(ConfiguredModel { model, .. }) =            LanguageModelRegistry::read_global(cx).inline_assistant_model()        else {            return;        };         let anthropic_reporter = language_model::AnthropicEventReporter::new(&model, cx);        let session_id = self.session_id;        let model_telemetry_id = model.telemetry_id();        let model_provider_id = model.provider_id().to_string();         self.status = CodegenStatus::Pending;        self.transaction = Some(TerminalTransaction::start(self.terminal.clone()));        self.generation = cx.spawn(async move |this, cx| {            let prompt = prompt_task.await;            let response = model.stream_completion_text(prompt, cx).await;            let generate = async {                let message_id = response                    .as_ref()                    .ok()                    .and_then(|response| response.message_id.clone());                 let (mut hunks_tx, mut hunks_rx) = mpsc::channel(1);                 let task = cx.background_spawn({                    let message_id = message_id.clone();                    let anthropic_reporter = anthropic_reporter.clone();                    async move {                        let mut response_latency = None;                        let request_start = Instant::now();                        let task = async {                            let mut chunks = response?.stream;                            while let Some(chunk) = chunks.next().await {                                if response_latency.is_none() {                                    response_latency = Some(request_start.elapsed());                                }                                let chunk = chunk?;                                hunks_tx.send(chunk).await?;                            }                             anyhow::Ok(())                        };                         let result = task.await;                         let error_message = result.as_ref().err().map(|error| error.to_string());                         telemetry::event!(                            "Assistant Responded",                            session_id = session_id.to_string(),                            kind = "inline_terminal",                            phase = "response",                            model = model_telemetry_id,                            model_provider = model_provider_id,                            language_name = Option::<&str>::None,                            message_id = message_id,                            response_latency = response_latency,                            error_message = error_message,                        );                         anthropic_reporter.report(language_model::AnthropicEventData {                            completion_type: language_model::AnthropicCompletionType::Terminal,                            event: language_model::AnthropicEventType::Response,                            language_name: None,                            message_id,                        });                         result?;                        anyhow::Ok(())                    }                });                 this.update(cx, |this, _| {                    this.message_id = message_id;                })?;                 while let Some(hunk) = hunks_rx.next().await {                    this.update(cx, |this, cx| {                        if let Some(transaction) = &mut this.transaction {                            transaction.push(hunk, cx);                            cx.notify();                        }                    })?;                }                 task.await?;                anyhow::Ok(())            };             let result = generate.await;             this.update(cx, |this, cx| {                if let Err(error) = result {                    this.status = CodegenStatus::Error(error);                } else {                    this.status = CodegenStatus::Done;                }                cx.emit(CodegenEvent::Finished);                cx.notify();            })            .ok();        });        cx.notify();    }     pub fn completion(&self) -> Option<String> {        self.transaction            .as_ref()            .map(|transaction| transaction.completion.clone())    }     pub fn stop(&mut self, cx: &mut Context<Self>) {        self.status = CodegenStatus::Done;        self.generation = Task::ready(());        cx.emit(CodegenEvent::Finished);        cx.notify();    }     pub fn complete(&mut self, cx: &mut Context<Self>) {        if let Some(transaction) = self.transaction.take() {            transaction.complete(cx);        }    }     pub fn undo(&mut self, cx: &mut Context<Self>) {        if let Some(transaction) = self.transaction.take() {            transaction.undo(cx);        }    }} #[derive(Copy, Clone, Debug)]pub enum CodegenEvent {    Finished,} #[cfg(not(target_os = "windows"))]pub const CLEAR_INPUT: &str = "\x15";#[cfg(target_os = "windows")]pub const CLEAR_INPUT: &str = "\x03";const CARRIAGE_RETURN: &str = "\x0d"; struct TerminalTransaction {    completion: String,    terminal: Entity<Terminal>,} impl TerminalTransaction {    pub fn start(terminal: Entity<Terminal>) -> Self {        Self {            completion: String::new(),            terminal,        }    }     pub fn push(&mut self, hunk: String, cx: &mut App) {        // Ensure that the assistant cannot accidentally execute commands that are streamed into the terminal        let input = Self::sanitize_input(hunk);        self.completion.push_str(&input);        self.terminal            .update(cx, |terminal, _| terminal.input(input.into_bytes()));    }     pub fn undo(self, cx: &mut App) {        self.terminal            .update(cx, |terminal, _| terminal.input(CLEAR_INPUT.as_bytes()));    }     pub fn complete(self, cx: &mut App) {        self.terminal            .update(cx, |terminal, _| terminal.input(CARRIAGE_RETURN.as_bytes()));    }     fn sanitize_input(mut input: String) -> String {        input.retain(|c| c != '\r' && c != '\n');        input    }}