use std::sync::Arc; use super::{ChatLocation, copilot_request_headers};use anyhow::{Result, anyhow};use futures::{AsyncBufReadExt, AsyncReadExt, StreamExt, io::BufReader, stream::BoxStream};use http_client::{AsyncBody, HttpClient, HttpRequestExt, Method, Request as HttpRequest};use serde::{Deserialize, Serialize};use serde_json::Value;pub use settings::OpenAiReasoningEffort as ReasoningEffort; #[derive(Serialize, Debug)]pub struct Request {    pub model: String,    pub input: Vec<ResponseInputItem>,    #[serde(default)]    pub stream: bool,    #[serde(skip_serializing_if = "Option::is_none")]    pub temperature: Option<f32>,    #[serde(skip_serializing_if = "Vec::is_empty")]    pub tools: Vec<ToolDefinition>,    #[serde(skip_serializing_if = "Option::is_none")]    pub tool_choice: Option<ToolChoice>,    #[serde(skip_serializing_if = "Option::is_none")]    pub reasoning: Option<ReasoningConfig>,    #[serde(skip_serializing_if = "Option::is_none")]    pub include: Option<Vec<ResponseIncludable>>,    pub store: bool,} #[derive(Serialize, Deserialize, Debug, Clone)]#[serde(rename_all = "snake_case")]pub enum ResponseIncludable {    #[serde(rename = "reasoning.encrypted_content")]    ReasoningEncryptedContent,} #[derive(Serialize, Deserialize, Debug)]#[serde(tag = "type", rename_all = "snake_case")]pub enum ToolDefinition {    Function {        name: String,        #[serde(skip_serializing_if = "Option::is_none")]        description: Option<String>,        #[serde(skip_serializing_if = "Option::is_none")]        parameters: Option<Value>,        #[serde(skip_serializing_if = "Option::is_none")]        strict: Option<bool>,    },} #[derive(Serialize, Deserialize, Debug)]#[serde(rename_all = "lowercase")]pub enum ToolChoice {    Auto,    Any,    None,    #[serde(untagged)]    Other(ToolDefinition),} #[derive(Serialize, Deserialize, Debug)]#[serde(rename_all = "lowercase")]pub enum ReasoningSummary {    Auto,    Concise,    Detailed,} #[derive(Serialize, Debug)]pub struct ReasoningConfig {    pub effort: ReasoningEffort,    #[serde(skip_serializing_if = "Option::is_none")]    pub summary: Option<ReasoningSummary>,} #[derive(Serialize, Deserialize, Debug, Clone, Default)]#[serde(rename_all = "snake_case")]pub enum ResponseImageDetail {    Low,    High,    #[default]    Auto,} #[derive(Serialize, Deserialize, Debug, Clone)]#[serde(tag = "type", rename_all = "snake_case")]pub enum ResponseInputContent {    InputText {        text: String,    },    OutputText {        text: String,    },    InputImage {        #[serde(skip_serializing_if = "Option::is_none")]        image_url: Option<String>,        #[serde(default)]        detail: ResponseImageDetail,    },} #[derive(Serialize, Deserialize, Debug, Clone)]#[serde(rename_all = "snake_case")]pub enum ItemStatus {    InProgress,    Completed,    Incomplete,} #[derive(Serialize, Deserialize, Debug, Clone)]#[serde(untagged)]pub enum ResponseFunctionOutput {    Text(String),    Content(Vec<ResponseInputContent>),} #[derive(Serialize, Deserialize, Debug, Clone)]#[serde(tag = "type", rename_all = "snake_case")]pub enum ResponseInputItem {    Message {        role: String,        #[serde(skip_serializing_if = "Option::is_none")]        content: Option<Vec<ResponseInputContent>>,        #[serde(skip_serializing_if = "Option::is_none")]        status: Option<String>,    },    FunctionCall {        call_id: String,        name: String,        arguments: String,        #[serde(skip_serializing_if = "Option::is_none")]        status: Option<ItemStatus>,        #[serde(default, skip_serializing_if = "Option::is_none")]        thought_signature: Option<String>,    },    FunctionCallOutput {        call_id: String,        output: ResponseFunctionOutput,        #[serde(skip_serializing_if = "Option::is_none")]        status: Option<ItemStatus>,    },    Reasoning {        #[serde(skip_serializing_if = "Option::is_none")]        id: Option<String>,        summary: Vec<ResponseReasoningItem>,        encrypted_content: String,    },} #[derive(Deserialize, Debug, Clone)]#[serde(rename_all = "snake_case")]pub enum IncompleteReason {    #[serde(rename = "max_output_tokens")]    MaxOutputTokens,    #[serde(rename = "content_filter")]    ContentFilter,} #[derive(Deserialize, Debug, Clone)]pub struct IncompleteDetails {    #[serde(skip_serializing_if = "Option::is_none")]    pub reason: Option<IncompleteReason>,} #[derive(Serialize, Deserialize, Debug, Clone)]pub struct ResponseReasoningItem {    #[serde(rename = "type")]    pub kind: String,    pub text: String,} #[derive(Deserialize, Debug)]#[serde(tag = "type")]pub enum StreamEvent {    #[serde(rename = "error")]    GenericError { error: ResponseError },     #[serde(rename = "response.created")]    Created { response: Response },     #[serde(rename = "response.output_item.added")]    OutputItemAdded {        output_index: usize,        #[serde(default)]        sequence_number: Option<u64>,        item: ResponseOutputItem,    },     #[serde(rename = "response.output_text.delta")]    OutputTextDelta {        item_id: String,        output_index: usize,        delta: String,    },     #[serde(rename = "response.output_item.done")]    OutputItemDone {        output_index: usize,        #[serde(default)]        sequence_number: Option<u64>,        item: ResponseOutputItem,    },     #[serde(rename = "response.incomplete")]    Incomplete { response: Response },     #[serde(rename = "response.completed")]    Completed { response: Response },     #[serde(rename = "response.failed")]    Failed { response: Response },     #[serde(other)]    Unknown,} #[derive(Deserialize, Debug, Clone)]pub struct ResponseError {    pub code: String,    pub message: String,} #[derive(Deserialize, Debug, Default, Clone)]pub struct Response {    pub id: Option<String>,    pub status: Option<String>,    pub usage: Option<ResponseUsage>,    pub output: Vec<ResponseOutputItem>,    #[serde(skip_serializing_if = "Option::is_none")]    pub incomplete_details: Option<IncompleteDetails>,    #[serde(skip_serializing_if = "Option::is_none")]    pub error: Option<ResponseError>,} #[derive(Deserialize, Debug, Default, Clone)]pub struct ResponseUsage {    pub input_tokens: Option<u64>,    pub output_tokens: Option<u64>,    pub total_tokens: Option<u64>,} #[derive(Deserialize, Debug, Clone)]#[serde(tag = "type", rename_all = "snake_case")]pub enum ResponseOutputItem {    Message {        id: String,        role: String,        #[serde(skip_serializing_if = "Option::is_none")]        content: Option<Vec<ResponseOutputContent>>,    },    FunctionCall {        #[serde(skip_serializing_if = "Option::is_none")]        id: Option<String>,        call_id: String,        name: String,        arguments: String,        #[serde(skip_serializing_if = "Option::is_none")]        status: Option<ItemStatus>,        #[serde(default, skip_serializing_if = "Option::is_none")]        thought_signature: Option<String>,    },    Reasoning {        id: String,        #[serde(skip_serializing_if = "Option::is_none")]        summary: Option<Vec<ResponseReasoningItem>>,        #[serde(skip_serializing_if = "Option::is_none")]        encrypted_content: Option<String>,    },} #[derive(Deserialize, Debug, Clone)]#[serde(tag = "type", rename_all = "snake_case")]pub enum ResponseOutputContent {    OutputText { text: String },    Refusal { refusal: String },} pub async fn stream_response(    client: Arc<dyn HttpClient>,    oauth_token: String,    api_url: String,    request: Request,    is_user_initiated: bool,    location: ChatLocation,) -> Result<BoxStream<'static, Result<StreamEvent>>> {    let is_vision_request = request.input.iter().any(|item| match item {        ResponseInputItem::Message {            content: Some(parts),            ..        } => parts            .iter()            .any(|p| matches!(p, ResponseInputContent::InputImage { .. })),        _ => false,    });     let request_builder = copilot_request_headers(        HttpRequest::builder().method(Method::POST).uri(&api_url),        &oauth_token,        Some(is_user_initiated),        Some(location),    )    .when(is_vision_request, |builder| {        builder.header("Copilot-Vision-Request", "true")    });     let is_streaming = request.stream;    let json = serde_json::to_string(&request)?;    let request = request_builder.body(AsyncBody::from(json))?;    let mut response = client.send(request).await?;     if !response.status().is_success() {        let mut body = String::new();        response.body_mut().read_to_string(&mut body).await?;        anyhow::bail!("Failed to connect to API: {} {}", response.status(), body);    }     if is_streaming {        let reader = BufReader::new(response.into_body());        Ok(reader            .lines()            .filter_map(|line| async move {                match line {                    Ok(line) => {                        let line = line.strip_prefix("data: ")?;                        if line.starts_with("[DONE]") || line.is_empty() {                            return None;                        }                         match serde_json::from_str::<StreamEvent>(line) {                            Ok(event) => Some(Ok(event)),                            Err(error) => {                                log::error!(                                    "Failed to parse Copilot responses stream event: `{}`\nResponse: `{}`",                                    error,                                    line,                                );                                Some(Err(anyhow!(error)))                            }                        }                    }                    Err(error) => Some(Err(anyhow!(error))),                }            })            .boxed())    } else {        // Simulate streaming this makes the mapping of this function return more straight-forward to handle if all callers assume it streams.        // Removes the need of having a method to map StreamEvent and another to map Response to a LanguageCompletionEvent        let mut body = String::new();        response.body_mut().read_to_string(&mut body).await?;         match serde_json::from_str::<Response>(&body) {            Ok(response) => {                let events = vec![StreamEvent::Created {                    response: response.clone(),                }];                 let mut all_events = events;                for (output_index, item) in response.output.iter().enumerate() {                    all_events.push(StreamEvent::OutputItemAdded {                        output_index,                        sequence_number: None,                        item: item.clone(),                    });                     if let ResponseOutputItem::Message {                        id,                        content: Some(content),                        ..                    } = item                    {                        for part in content {                            if let ResponseOutputContent::OutputText { text } = part {                                all_events.push(StreamEvent::OutputTextDelta {                                    item_id: id.clone(),                                    output_index,                                    delta: text.clone(),                                });                            }                        }                    }                     all_events.push(StreamEvent::OutputItemDone {                        output_index,                        sequence_number: None,                        item: item.clone(),                    });                }                 let final_event = if response.error.is_some() {                    StreamEvent::Failed { response }                } else if response.incomplete_details.is_some() {                    StreamEvent::Incomplete { response }                } else {                    StreamEvent::Completed { response }                };                all_events.push(final_event);                 Ok(futures::stream::iter(all_events.into_iter().map(Ok)).boxed())            }            Err(error) => {                log::error!(                    "Failed to parse Copilot non-streaming response: `{}`\nResponse: `{}`",                    error,                    body,                );                Err(anyhow!(error))            }        }    }}