use crate::components::KernelListItem;use crate::KernelStatus;use crate::{    kernels::{Kernel, KernelSpecification, RunningKernel},    outputs::{ExecutionStatus, ExecutionView},};use client::telemetry::Telemetry;use collections::{HashMap, HashSet};use editor::{    display_map::{        BlockContext, BlockId, BlockPlacement, BlockProperties, BlockStyle, CustomBlockId,        RenderBlock,    },    scroll::Autoscroll,    Anchor, AnchorRangeExt as _, Editor, MultiBuffer, ToPoint,};use futures::io::BufReader;use futures::{AsyncBufReadExt as _, FutureExt as _, StreamExt as _};use gpui::{    div, prelude::*, EventEmitter, Model, Render, Subscription, Task, View, ViewContext, WeakView,};use language::Point;use project::Fs;use runtimelib::{    ExecuteRequest, ExecutionState, InterruptRequest, JupyterMessage, JupyterMessageContent,    ShutdownRequest,};use std::{env::temp_dir, ops::Range, sync::Arc, time::Duration};use theme::ActiveTheme;use ui::{prelude::*, IconButtonShape, Tooltip}; pub struct Session {    fs: Arc<dyn Fs>,    editor: WeakView<Editor>,    pub kernel: Kernel,    blocks: HashMap<String, EditorBlock>,    messaging_task: Option<Task<()>>,    process_status_task: Option<Task<()>>,    pub kernel_specification: KernelSpecification,    telemetry: Arc<Telemetry>,    _buffer_subscription: Subscription,} struct EditorBlock {    code_range: Range<Anchor>,    invalidation_anchor: Anchor,    block_id: CustomBlockId,    execution_view: View<ExecutionView>,} type CloseBlockFn =    Arc<dyn for<'a> Fn(CustomBlockId, &'a mut WindowContext) + Send + Sync + 'static>; impl EditorBlock {    fn new(        editor: WeakView<Editor>,        code_range: Range<Anchor>,        status: ExecutionStatus,        on_close: CloseBlockFn,        cx: &mut ViewContext<Session>,    ) -> anyhow::Result<Self> {        let editor = editor            .upgrade()            .ok_or_else(|| anyhow::anyhow!("editor is not open"))?;        let workspace = editor            .read(cx)            .workspace()            .ok_or_else(|| anyhow::anyhow!("workspace dropped"))?;         let execution_view =            cx.new_view(|cx| ExecutionView::new(status, workspace.downgrade(), cx));         let (block_id, invalidation_anchor) = editor.update(cx, |editor, cx| {            let buffer = editor.buffer().clone();            let buffer_snapshot = buffer.read(cx).snapshot(cx);            let end_point = code_range.end.to_point(&buffer_snapshot);            let next_row_start = end_point + Point::new(1, 0);            if next_row_start > buffer_snapshot.max_point() {                buffer.update(cx, |buffer, cx| {                    buffer.edit(                        [(                            buffer_snapshot.max_point()..buffer_snapshot.max_point(),                            "\n",                        )],                        None,                        cx,                    )                });            }             let invalidation_anchor = buffer.read(cx).read(cx).anchor_before(next_row_start);            let block = BlockProperties {                placement: BlockPlacement::Below(code_range.end),                // Take up at least one height for status, allow the editor to determine the real height based on the content from render                height: 1,                style: BlockStyle::Sticky,                render: Self::create_output_area_renderer(execution_view.clone(), on_close.clone()),                priority: 0,            };             let block_id = editor.insert_blocks([block], None, cx)[0];            (block_id, invalidation_anchor)        });         anyhow::Ok(Self {            code_range,            invalidation_anchor,            block_id,            execution_view,        })    }     fn handle_message(&mut self, message: &JupyterMessage, cx: &mut ViewContext<Session>) {        self.execution_view.update(cx, |execution_view, cx| {            execution_view.push_message(&message.content, cx);        });    }     fn create_output_area_renderer(        execution_view: View<ExecutionView>,        on_close: CloseBlockFn,    ) -> RenderBlock {        let render = move |cx: &mut BlockContext| {            let execution_view = execution_view.clone();            let text_style = crate::outputs::plain::text_style(cx);             let gutter = cx.gutter_dimensions;             let block_id = cx.block_id;            let on_close = on_close.clone();             let rem_size = cx.rem_size();             let text_line_height = text_style.line_height_in_pixels(rem_size);             let close_button = h_flex()                .flex_none()                .items_center()                .justify_center()                .absolute()                .top(text_line_height / 2.)                .right(                    // 2px is a magic number to nudge the button just a bit closer to                    // the line number start                    gutter.full_width() / 2.0 - text_line_height / 2.0 - px(2.),                )                .w(text_line_height)                .h(text_line_height)                .child(                    IconButton::new("close_output_area", IconName::Close)                        .icon_size(IconSize::Small)                        .icon_color(Color::Muted)                        .size(ButtonSize::Compact)                        .shape(IconButtonShape::Square)                        .tooltip(|cx| Tooltip::text("Close output area", cx))                        .on_click(move |_, cx| {                            if let BlockId::Custom(block_id) = block_id {                                (on_close)(block_id, cx)                            }                        }),                );             div()                .id(cx.block_id)                .flex()                .items_start()                .min_h(text_line_height)                .w_full()                .border_y_1()                .border_color(cx.theme().colors().border)                .bg(cx.theme().colors().background)                .child(                    div()                        .relative()                        .w(gutter.full_width())                        .h(text_line_height * 2)                        .child(close_button),                )                .child(                    div()                        .flex_1()                        .size_full()                        .py(text_line_height / 2.)                        .mr(gutter.width)                        .child(execution_view),                )                .into_any_element()        };         Box::new(render)    }} impl Session {    pub fn new(        editor: WeakView<Editor>,        fs: Arc<dyn Fs>,        telemetry: Arc<Telemetry>,        kernel_specification: KernelSpecification,        cx: &mut ViewContext<Self>,    ) -> Self {        let subscription = match editor.upgrade() {            Some(editor) => {                let buffer = editor.read(cx).buffer().clone();                cx.subscribe(&buffer, Self::on_buffer_event)            }            None => Subscription::new(|| {}),        };         let mut session = Self {            fs,            editor,            kernel: Kernel::StartingKernel(Task::ready(()).shared()),            messaging_task: None,            process_status_task: None,            blocks: HashMap::default(),            kernel_specification,            _buffer_subscription: subscription,            telemetry,        };         session.start_kernel(cx);        session    }     fn start_kernel(&mut self, cx: &mut ViewContext<Self>) {        let kernel_language = self.kernel_specification.kernelspec.language.clone();        let entity_id = self.editor.entity_id();        let working_directory = self            .editor            .upgrade()            .and_then(|editor| editor.read(cx).working_directory(cx))            .unwrap_or_else(temp_dir);         self.telemetry.report_repl_event(            kernel_language.clone(),            KernelStatus::Starting.to_string(),            cx.entity_id().to_string(),        );         let kernel = RunningKernel::new(            self.kernel_specification.clone(),            entity_id,            working_directory,            self.fs.clone(),            cx,        );         let pending_kernel = cx            .spawn(|this, mut cx| async move {                let kernel = kernel.await;                 match kernel {                    Ok((mut kernel, mut messages_rx)) => {                        this.update(&mut cx, |session, cx| {                            let stderr = kernel.process.stderr.take();                             cx.spawn(|_session, mut _cx| async move {                                if stderr.is_none() {                                    return;                                }                                let reader = BufReader::new(stderr.unwrap());                                let mut lines = reader.lines();                                while let Some(Ok(line)) = lines.next().await {                                    // todo!(): Log stdout and stderr to something the session can show                                    log::error!("kernel: {}", line);                                }                            })                            .detach();                             let stdout = kernel.process.stdout.take();                             cx.spawn(|_session, mut _cx| async move {                                if stdout.is_none() {                                    return;                                }                                let reader = BufReader::new(stdout.unwrap());                                let mut lines = reader.lines();                                while let Some(Ok(line)) = lines.next().await {                                    log::info!("kernel: {}", line);                                }                            })                            .detach();                             let status = kernel.process.status();                            session.kernel(Kernel::RunningKernel(kernel), cx);                             let process_status_task = cx.spawn(|session, mut cx| async move {                                let error_message = match status.await {                                    Ok(status) => {                                        if status.success() {                                            log::info!("kernel process exited successfully");                                            return;                                        }                                         format!("kernel process exited with status: {:?}", status)                                    }                                    Err(err) => {                                        format!("kernel process exited with error: {:?}", err)                                    }                                };                                 log::error!("{}", error_message);                                 session                                    .update(&mut cx, |session, cx| {                                        session.kernel(                                            Kernel::ErroredLaunch(error_message.clone()),                                            cx,                                        );                                         session.blocks.values().for_each(|block| {                                            block.execution_view.update(                                                cx,                                                |execution_view, cx| {                                                    match execution_view.status {                                                        ExecutionStatus::Finished => {                                                            // Do nothing when the output was good                                                        }                                                        _ => {                                                            // All other cases, set the status to errored                                                            execution_view.status =                                                                ExecutionStatus::KernelErrored(                                                                    error_message.clone(),                                                                )                                                        }                                                    }                                                    cx.notify();                                                },                                            );                                        });                                         cx.notify();                                    })                                    .ok();                            });                             session.process_status_task = Some(process_status_task);                             session.messaging_task = Some(cx.spawn(|session, mut cx| async move {                                while let Some(message) = messages_rx.next().await {                                    session                                        .update(&mut cx, |session, cx| {                                            session.route(&message, cx);                                        })                                        .ok();                                }                            }));                             // todo!(@rgbkrk): send KernelInfoRequest once our shell channel read/writes are split                            // cx.spawn(|this, mut cx| async move {                            //     cx.background_executor()                            //         .timer(Duration::from_millis(120))                            //         .await;                            //     this.update(&mut cx, |this, cx| {                            //         this.send(KernelInfoRequest {}.into(), cx).ok();                            //     })                            //     .ok();                            // })                            // .detach();                        })                        .ok();                    }                    Err(err) => {                        this.update(&mut cx, |session, cx| {                            session.kernel(Kernel::ErroredLaunch(err.to_string()), cx);                        })                        .ok();                    }                }            })            .shared();         self.kernel(Kernel::StartingKernel(pending_kernel), cx);        cx.notify();    }     fn on_buffer_event(        &mut self,        buffer: Model<MultiBuffer>,        event: &multi_buffer::Event,        cx: &mut ViewContext<Self>,    ) {        if let multi_buffer::Event::Edited { .. } = event {            let snapshot = buffer.read(cx).snapshot(cx);             let mut blocks_to_remove: HashSet<CustomBlockId> = HashSet::default();             self.blocks.retain(|_id, block| {                if block.invalidation_anchor.is_valid(&snapshot) {                    true                } else {                    blocks_to_remove.insert(block.block_id);                    false                }            });             if !blocks_to_remove.is_empty() {                self.editor                    .update(cx, |editor, cx| {                        editor.remove_blocks(blocks_to_remove, None, cx);                    })                    .ok();                cx.notify();            }        }    }     fn send(&mut self, message: JupyterMessage, _cx: &mut ViewContext<Self>) -> anyhow::Result<()> {        if let Kernel::RunningKernel(kernel) = &mut self.kernel {            kernel.request_tx.try_send(message).ok();        }         anyhow::Ok(())    }     pub fn clear_outputs(&mut self, cx: &mut ViewContext<Self>) {        let blocks_to_remove: HashSet<CustomBlockId> =            self.blocks.values().map(|block| block.block_id).collect();         self.editor            .update(cx, |editor, cx| {                editor.remove_blocks(blocks_to_remove, None, cx);            })            .ok();         self.blocks.clear();    }     pub fn execute(        &mut self,        code: String,        anchor_range: Range<Anchor>,        next_cell: Option<Anchor>,        move_down: bool,        cx: &mut ViewContext<Self>,    ) {        let Some(editor) = self.editor.upgrade() else {            return;        };         if code.is_empty() {            return;        }         let execute_request = ExecuteRequest {            code,            ..ExecuteRequest::default()        };         let message: JupyterMessage = execute_request.into();         let mut blocks_to_remove: HashSet<CustomBlockId> = HashSet::default();         let buffer = editor.read(cx).buffer().read(cx).snapshot(cx);         self.blocks.retain(|_key, block| {            if anchor_range.overlaps(&block.code_range, &buffer) {                blocks_to_remove.insert(block.block_id);                false            } else {                true            }        });         self.editor            .update(cx, |editor, cx| {                editor.remove_blocks(blocks_to_remove, None, cx);            })            .ok();         let status = match &self.kernel {            Kernel::Restarting => ExecutionStatus::Restarting,            Kernel::RunningKernel(_) => ExecutionStatus::Queued,            Kernel::StartingKernel(_) => ExecutionStatus::ConnectingToKernel,            Kernel::ErroredLaunch(error) => ExecutionStatus::KernelErrored(error.clone()),            Kernel::ShuttingDown => ExecutionStatus::ShuttingDown,            Kernel::Shutdown => ExecutionStatus::Shutdown,        };         let parent_message_id = message.header.msg_id.clone();        let session_view = cx.view().downgrade();        let weak_editor = self.editor.clone();         let on_close: CloseBlockFn =            Arc::new(move |block_id: CustomBlockId, cx: &mut WindowContext| {                if let Some(session) = session_view.upgrade() {                    session.update(cx, |session, cx| {                        session.blocks.remove(&parent_message_id);                        cx.notify();                    });                }                 if let Some(editor) = weak_editor.upgrade() {                    editor.update(cx, |editor, cx| {                        let mut block_ids = HashSet::default();                        block_ids.insert(block_id);                        editor.remove_blocks(block_ids, None, cx);                    });                }

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