mod assets;
pub mod languages;
mod only_instance;
mod open_listener;

pub use assets::*;
use collections::HashMap;
use gpui2::{
    point, px, AsyncAppContext, Point, Styled, TitlebarOptions, WindowBounds, WindowKind,
    WindowOptions,
};
pub use only_instance::*;
pub use open_listener::*;

use anyhow::{Context, Result};
use cli::{
    ipc::{self, IpcSender},
    CliRequest, CliResponse, IpcHandshake,
};
use futures::{
    channel::{mpsc, oneshot},
    FutureExt, SinkExt, StreamExt,
};
use std::{path::Path, sync::Arc, thread, time::Duration};
use util::{paths::PathLikeWithPosition, ResultExt};
use uuid::Uuid;
use workspace2::AppState;

pub fn connect_to_cli(
    server_name: &str,
) -> Result<(mpsc::Receiver<CliRequest>, IpcSender<CliResponse>)> {
    let handshake_tx = cli::ipc::IpcSender::<IpcHandshake>::connect(server_name.to_string())
        .context("error connecting to cli")?;
    let (request_tx, request_rx) = ipc::channel::<CliRequest>()?;
    let (response_tx, response_rx) = ipc::channel::<CliResponse>()?;

    handshake_tx
        .send(IpcHandshake {
            requests: request_tx,
            responses: response_rx,
        })
        .context("error sending ipc handshake")?;

    let (mut async_request_tx, async_request_rx) =
        futures::channel::mpsc::channel::<CliRequest>(16);
    thread::spawn(move || {
        while let Ok(cli_request) = request_rx.recv() {
            if smol::block_on(async_request_tx.send(cli_request)).is_err() {
                break;
            }
        }
        Ok::<_, anyhow::Error>(())
    });

    Ok((async_request_rx, response_tx))
}

pub async fn handle_cli_connection(
    (mut requests, responses): (mpsc::Receiver<CliRequest>, IpcSender<CliResponse>),
    app_state: Arc<AppState>,
    mut cx: AsyncAppContext,
) {
    if let Some(request) = requests.next().await {
        match request {
            CliRequest::Open { paths, wait } => {
                let mut caret_positions = HashMap::default();

                let paths = if paths.is_empty() {
                    todo!()
                    //     workspace::last_opened_workspace_paths()
                    //         .await
                    //         .map(|location| location.paths().to_vec())
                    //         .unwrap_or_default()
                } else {
                    paths
                        .into_iter()
                        .filter_map(|path_with_position_string| {
                            let path_with_position = PathLikeWithPosition::parse_str(
                                &path_with_position_string,
                                |path_str| {
                                    Ok::<_, std::convert::Infallible>(
                                        Path::new(path_str).to_path_buf(),
                                    )
                                },
                            )
                            .expect("Infallible");
                            let path = path_with_position.path_like;
                            if let Some(row) = path_with_position.row {
                                if path.is_file() {
                                    let row = row.saturating_sub(1);
                                    let col =
                                        path_with_position.column.unwrap_or(0).saturating_sub(1);
                                    caret_positions.insert(path.clone(), Point::new(row, col));
                                }
                            }
                            Some(path)
                        })
                        .collect::<Vec<_>>()
                };

                let mut errored = false;

                if let Some(open_paths_task) = cx
                    .update(|cx| workspace2::open_paths(&paths, &app_state, None, cx))
                    .log_err()
                {
                    match open_paths_task.await {
                        Ok((workspace, items)) => {
                            let mut item_release_futures = Vec::new();

                            for (item, path) in items.into_iter().zip(&paths) {
                                match item {
                                    Some(Ok(mut item)) => {
                                        if let Some(point) = caret_positions.remove(path) {
                                            todo!()
                                            // if let Some(active_editor) = item.downcast::<Editor>() {
                                            //     active_editor
                                            //         .downgrade()
                                            //         .update(&mut cx, |editor, cx| {
                                            //             let snapshot =
                                            //                 editor.snapshot(cx).display_snapshot;
                                            //             let point = snapshot
                                            //                 .buffer_snapshot
                                            //                 .clip_point(point, Bias::Left);
                                            //             editor.change_selections(
                                            //                 Some(Autoscroll::center()),
                                            //                 cx,
                                            //                 |s| s.select_ranges([point..point]),
                                            //             );
                                            //         })
                                            //         .log_err();
                                            // }
                                        }

                                        let released = oneshot::channel();
                                        cx.update(move |cx| {
                                            item.on_release(
                                                cx,
                                                Box::new(move |_| {
                                                    let _ = released.0.send(());
                                                }),
                                            )
                                            .detach();
                                        });
                                        item_release_futures.push(released.1);
                                    }
                                    Some(Err(err)) => {
                                        responses
                                            .send(CliResponse::Stderr {
                                                message: format!(
                                                    "error opening {:?}: {}",
                                                    path, err
                                                ),
                                            })
                                            .log_err();
                                        errored = true;
                                    }
                                    None => {}
                                }
                            }

                            if wait {
                                let executor = cx.executor().clone();
                                let wait = async move {
                                    if paths.is_empty() {
                                        let (done_tx, done_rx) = oneshot::channel();
                                        let _subscription =
                                            cx.update_window_root(&workspace, move |_, cx| {
                                                cx.on_release(|_, _| {
                                                    let _ = done_tx.send(());
                                                })
                                            });
                                        drop(workspace);
                                        let _ = done_rx.await;
                                    } else {
                                        let _ = futures::future::try_join_all(item_release_futures)
                                            .await;
                                    };
                                }
                                .fuse();
                                futures::pin_mut!(wait);

                                loop {
                                    // Repeatedly check if CLI is still open to avoid wasting resources
                                    // waiting for files or workspaces to close.
                                    let mut timer = executor.timer(Duration::from_secs(1)).fuse();
                                    futures::select_biased! {
                                        _ = wait => break,
                                        _ = timer => {
                                            if responses.send(CliResponse::Ping).is_err() {
                                                break;
                                            }
                                        }
                                    }
                                }
                            }
                        }
                        Err(error) => {
                            errored = true;
                            responses
                                .send(CliResponse::Stderr {
                                    message: format!("error opening {:?}: {}", paths, error),
                                })
                                .log_err();
                        }
                    }

                    responses
                        .send(CliResponse::Exit {
                            status: i32::from(errored),
                        })
                        .log_err();
                }
            }
        }
    }
}

pub fn build_window_options(
    bounds: Option<WindowBounds>,
    display: Option<Uuid>,
    platform: &dyn Platform,
) -> WindowOptions {
    let bounds = bounds.unwrap_or(WindowBounds::Maximized);
    let display_id = display.and_then(|display| platform.screen_by_id(display));

    WindowOptions {
        bounds,
        titlebar: Some(TitlebarOptions {
            title: None,
            appears_transparent: true,
            traffic_light_position: Some(point(px(8.), px(8.))),
        }),
        center: false,
        focus: false,
        show: false,
        kind: WindowKind::Normal,
        is_movable: false,
        display_id,
    }
}