use call::{room, ActiveCall};
use client::User;
use collections::HashMap;
use gpui::{
    actions,
    elements::*,
    geometry::{rect::RectF, vector::vec2f},
    CursorStyle, Entity, MouseButton, MutableAppContext, RenderContext, View, ViewContext,
    WindowBounds, WindowKind, WindowOptions,
};
use settings::Settings;
use std::sync::Arc;
use workspace::JoinProject;

actions!(project_shared_notification, [DismissProject]);

pub fn init(cx: &mut MutableAppContext) {
    cx.add_action(ProjectSharedNotification::join);
    cx.add_action(ProjectSharedNotification::dismiss);

    let active_call = ActiveCall::global(cx);
    let mut notification_windows = HashMap::default();
    cx.subscribe(&active_call, move |_, event, cx| match event {
        room::Event::RemoteProjectShared {
            owner,
            project_id,
            worktree_root_names,
        } => {
            const PADDING: f32 = 16.;
            let theme = &cx.global::<Settings>().theme.project_shared_notification;
            let window_size = vec2f(theme.window_width, theme.window_height);

            for screen in cx.platform().screens() {
                let screen_bounds = screen.bounds();
                let (window_id, _) = cx.add_window(
                    WindowOptions {
                        bounds: WindowBounds::Fixed(RectF::new(
                            screen_bounds.upper_right() - vec2f(PADDING + window_size.x(), PADDING),
                            window_size,
                        )),
                        titlebar: None,
                        center: false,
                        focus: false,
                        kind: WindowKind::PopUp,
                        is_movable: false,
                        screen: Some(screen),
                    },
                    |_| {
                        ProjectSharedNotification::new(
                            owner.clone(),
                            *project_id,
                            worktree_root_names.clone(),
                        )
                    },
                );
                notification_windows
                    .entry(*project_id)
                    .or_insert(Vec::new())
                    .push(window_id);
            }
        }
        room::Event::RemoteProjectUnshared { project_id } => {
            if let Some(window_ids) = notification_windows.remove(&project_id) {
                for window_id in window_ids {
                    cx.remove_window(window_id);
                }
            }
        }
        room::Event::Left => {
            for (_, window_ids) in notification_windows.drain() {
                for window_id in window_ids {
                    cx.remove_window(window_id);
                }
            }
        }
        _ => {}
    })
    .detach();
}

pub struct ProjectSharedNotification {
    project_id: u64,
    worktree_root_names: Vec<String>,
    owner: Arc<User>,
}

impl ProjectSharedNotification {
    fn new(owner: Arc<User>, project_id: u64, worktree_root_names: Vec<String>) -> Self {
        Self {
            project_id,
            worktree_root_names,
            owner,
        }
    }

    fn join(&mut self, _: &JoinProject, cx: &mut ViewContext<Self>) {
        let window_id = cx.window_id();
        cx.remove_window(window_id);
        cx.propagate_action();
    }

    fn dismiss(&mut self, _: &DismissProject, cx: &mut ViewContext<Self>) {
        let window_id = cx.window_id();
        cx.remove_window(window_id);
    }

    fn render_owner(&self, cx: &mut RenderContext<Self>) -> ElementBox {
        let theme = &cx.global::<Settings>().theme.project_shared_notification;
        Flex::row()
            .with_children(self.owner.avatar.clone().map(|avatar| {
                Image::new(avatar)
                    .with_style(theme.owner_avatar)
                    .aligned()
                    .boxed()
            }))
            .with_child(
                Flex::column()
                    .with_child(
                        Label::new(
                            self.owner.github_login.clone(),
                            theme.owner_username.text.clone(),
                        )
                        .contained()
                        .with_style(theme.owner_username.container)
                        .boxed(),
                    )
                    .with_child(
                        Label::new(
                            format!(
                                "is sharing a project in Zed{}",
                                if self.worktree_root_names.is_empty() {
                                    ""
                                } else {
                                    ":"
                                }
                            ),
                            theme.message.text.clone(),
                        )
                        .contained()
                        .with_style(theme.message.container)
                        .boxed(),
                    )
                    .with_children(if self.worktree_root_names.is_empty() {
                        None
                    } else {
                        Some(
                            Label::new(
                                self.worktree_root_names.join(", "),
                                theme.worktree_roots.text.clone(),
                            )
                            .contained()
                            .with_style(theme.worktree_roots.container)
                            .boxed(),
                        )
                    })
                    .contained()
                    .with_style(theme.owner_metadata)
                    .aligned()
                    .boxed(),
            )
            .contained()
            .with_style(theme.owner_container)
            .flex(1., true)
            .boxed()
    }

    fn render_buttons(&self, cx: &mut RenderContext<Self>) -> ElementBox {
        enum Open {}
        enum Dismiss {}

        let project_id = self.project_id;
        let owner_user_id = self.owner.id;

        Flex::column()
            .with_child(
                MouseEventHandler::<Open>::new(0, cx, |_, cx| {
                    let theme = &cx.global::<Settings>().theme.project_shared_notification;
                    Label::new("Open".to_string(), theme.open_button.text.clone())
                        .aligned()
                        .contained()
                        .with_style(theme.open_button.container)
                        .boxed()
                })
                .with_cursor_style(CursorStyle::PointingHand)
                .on_click(MouseButton::Left, move |_, cx| {
                    cx.dispatch_action(JoinProject {
                        project_id,
                        follow_user_id: owner_user_id,
                    });
                })
                .flex(1., true)
                .boxed(),
            )
            .with_child(
                MouseEventHandler::<Dismiss>::new(0, cx, |_, cx| {
                    let theme = &cx.global::<Settings>().theme.project_shared_notification;
                    Label::new("Dismiss".to_string(), theme.dismiss_button.text.clone())
                        .aligned()
                        .contained()
                        .with_style(theme.dismiss_button.container)
                        .boxed()
                })
                .with_cursor_style(CursorStyle::PointingHand)
                .on_click(MouseButton::Left, |_, cx| {
                    cx.dispatch_action(DismissProject);
                })
                .flex(1., true)
                .boxed(),
            )
            .constrained()
            .with_width(
                cx.global::<Settings>()
                    .theme
                    .project_shared_notification
                    .button_width,
            )
            .boxed()
    }
}

impl Entity for ProjectSharedNotification {
    type Event = ();
}

impl View for ProjectSharedNotification {
    fn ui_name() -> &'static str {
        "ProjectSharedNotification"
    }

    fn render(&mut self, cx: &mut RenderContext<Self>) -> gpui::ElementBox {
        let background = cx
            .global::<Settings>()
            .theme
            .project_shared_notification
            .background;
        Flex::row()
            .with_child(self.render_owner(cx))
            .with_child(self.render_buttons(cx))
            .contained()
            .with_background_color(background)
            .expanded()
            .boxed()
    }
}