const { Gdk, Gtk } = imports.gi;
import { SCREEN_HEIGHT, SCREEN_WIDTH } from '../../imports.js';
import App from 'resource:///com/github/Aylur/ags/app.js';
import Widget from 'resource:///com/github/Aylur/ags/widget.js';
import * as Utils from 'resource:///com/github/Aylur/ags/utils.js';

import Hyprland from 'resource:///com/github/Aylur/ags/service/hyprland.js';
const { execAsync, exec } = Utils;
import { setupCursorHoverGrab } from "../../lib/cursorhover.js";
import { dumpToWorkspace, swapWorkspace } from "./actions.js";

const OVERVIEW_SCALE = 0.18; // = overview workspace box / screen size
const OVERVIEW_WS_NUM_SCALE = 0.09;
const OVERVIEW_WS_NUM_MARGIN_SCALE = 0.07;
const TARGET = [Gtk.TargetEntry.new('text/plain', Gtk.TargetFlags.SAME_APP, 0)];

function truncateTitle(str) {
    let lastDash = -1;
    let found = -1; // 0: em dash, 1: en dash, 2: minus, 3: vertical bar, 4: middle dot
    for (let i = str.length - 1; i >= 0; i--) {
        if (str[i] === '—') {
            found = 0;
            lastDash = i;
        }
        else if (str[i] === '–' && found < 1) {
            found = 1;
            lastDash = i;
        }
        else if (str[i] === '-' && found < 2) {
            found = 2;
            lastDash = i;
        }
        else if (str[i] === '|' && found < 3) {
            found = 3;
            lastDash = i;
        }
        else if (str[i] === '·' && found < 4) {
            found = 4;
            lastDash = i;
        }
    }
    if (lastDash === -1) return str;
    return str.substring(0, lastDash);
}

function iconExists(iconName) {
    let iconTheme = Gtk.IconTheme.get_default();
    return iconTheme.has_icon(iconName);
}

function substitute(str) {
    const subs = [
        { from: 'code-url-handler', to: 'visual-studio-code' },
        { from: 'Code', to: 'visual-studio-code' },
        { from: 'GitHub Desktop', to: 'github-desktop' },
        { from: 'wpsoffice', to: 'wps-office2019-kprometheus' },
        { from: 'gnome-tweaks', to: 'org.gnome.tweaks' },
        { from: 'Minecraft* 1.20.1', to: 'minecraft' },
        { from: '', to: 'image-missing' },
    ];

    for (const { from, to } of subs) {
        if (from === str)
            return to;
    }

    if (!iconExists(str)) str = str.toLowerCase().replace(/\s+/g, '-'); // Turn into kebab-case
    return str;
}

const ContextMenuWorkspaceArray = ({ label, actionFunc, thisWorkspace }) => Widget.MenuItem({
    label: `${label}`,
    setup: (menuItem) => {
        let submenu = new Gtk.Menu();
        submenu.className = 'menu';
        for (let i = 1; i <= 10; i++) {
            let button = new Gtk.MenuItem({
                label: `Workspace ${i}`
            });
            button.connect("activate", () => {
                // execAsync([`${onClickBinary}`, `${thisWorkspace}`, `${i}`]).catch(print);
                actionFunc(thisWorkspace, i);
            });
            submenu.append(button);
        }
        menuItem.set_reserve_indicator(true);
        menuItem.set_submenu(submenu);
    }
})

const client = ({ address, size: [w, h], workspace: { id, name }, class: c, title, xwayland }) => {
    const revealInfoCondition = (Math.min(w, h) * OVERVIEW_SCALE > 70);
    if (w <= 0 || h <= 0) return null;
    // title = truncateTitle(title);
    return Widget.Button({
        className: 'overview-tasks-window',
        hpack: 'center',
        vpack: 'center',
        onClicked: () => {
            Hyprland.sendMessage(`dispatch focuswindow address:${address}`);
            App.closeWindow('overview');
        },
        onMiddleClickRelease: () => Hyprland.sendMessage(`dispatch closewindow address:${address}`),
        onSecondaryClick: (button) => {
            button.toggleClassName('overview-tasks-window-selected', true);
            const menu = Widget.Menu({
                className: 'menu',
                children: [
                    Widget.MenuItem({
                        child: Widget.Label({
                            xalign: 0,
                            label: "Close (Middle-click)",
                        }),
                        onActivate: () => Hyprland.sendMessage(`dispatch closewindow address:${address}`),
                    }),
                    ContextMenuWorkspaceArray({
                        label: "Dump windows to workspace",
                        actionFunc: dumpToWorkspace,
                        thisWorkspace: Number(id)
                    }),
                    ContextMenuWorkspaceArray({
                        label: "Swap windows with workspace",
                        actionFunc: swapWorkspace,
                        thisWorkspace: Number(id)
                    }),
                ],
            });
            menu.connect("deactivate", () => {
                button.toggleClassName('overview-tasks-window-selected', false);
            })
            menu.connect("selection-done", () => {
                button.toggleClassName('overview-tasks-window-selected', false);
            })
            menu.popup_at_pointer(null); // Show the menu at the pointer's position
        },
        child: Widget.Box({
            css: `
                min-width: ${Math.max(w * OVERVIEW_SCALE - 4, 1)}px;
                min-height: ${Math.max(h * OVERVIEW_SCALE - 4, 1)}px;
            `,
            homogeneous: true,
            child: Widget.Box({
                vertical: true,
                vpack: 'center',
                className: 'spacing-v-5',
                children: [
                    Widget.Icon({
                        icon: substitute(c),
                        size: Math.min(w, h) * OVERVIEW_SCALE / 2.5,
                    }),
                    // TODO: Add xwayland tag instead of just having italics
                    Widget.Revealer({
                        transition: 'slide_down',
                        revealChild: revealInfoCondition,
                        child: Widget.Label({
                            truncate: 'end',
                            className: `${xwayland ? 'txt txt-italic' : 'txt'}`,
                            css: `
                                font-size: ${Math.min(SCREEN_WIDTH, SCREEN_HEIGHT) * OVERVIEW_SCALE / 14.6}px;
                                margin: 0px ${Math.min(SCREEN_WIDTH, SCREEN_HEIGHT) * OVERVIEW_SCALE / 10}px;
                            `,
                            // If the title is too short, include the class
                            label: (title.length <= 1 ? `${c}: ${title}` : title),
                        })
                    })
                ]
            })
        }),
        tooltipText: `${c}: ${title}`,
        setup: (button) => {
            setupCursorHoverGrab(button);

            button.drag_source_set(Gdk.ModifierType.BUTTON1_MASK, TARGET, Gdk.DragAction.MOVE);
            button.drag_source_set_icon_name(substitute(c));
            // button.drag_source_set_icon_gicon(icon);

            button.connect('drag-begin', (button) => {  // On drag start, add the dragging class
                button.toggleClassName('overview-tasks-window-dragging', true);
            });
            button.connect('drag-data-get', (_w, _c, data) => { // On drag finish, give address
                data.set_text(address, address.length);
                button.toggleClassName('overview-tasks-window-dragging', false);
            });
        },
    });
}

const workspace = index => {
    const fixed = Gtk.Fixed.new();
    const WorkspaceNumber = (index) => Widget.Label({
        className: 'overview-tasks-workspace-number',
        label: `${index}`,
        css: `
            margin: ${Math.min(SCREEN_WIDTH, SCREEN_HEIGHT) * OVERVIEW_SCALE * OVERVIEW_WS_NUM_MARGIN_SCALE}px;
            font-size: ${SCREEN_HEIGHT * OVERVIEW_SCALE * OVERVIEW_WS_NUM_SCALE}px;
        `,
    })
    const widget = Widget.Box({
        className: 'overview-tasks-workspace',
        vpack: 'center',
        css: `
        min-width: ${SCREEN_WIDTH * OVERVIEW_SCALE}px;
        min-height: ${SCREEN_HEIGHT * OVERVIEW_SCALE}px;
        `,
        children: [Widget.EventBox({
            hexpand: true,
            vexpand: true,
            onPrimaryClick: () => {
                Hyprland.sendMessage(`dispatch workspace ${index}`)
                App.closeWindow('overview');
            },
            setup: (eventbox) => {
                eventbox.drag_dest_set(Gtk.DestDefaults.ALL, TARGET, Gdk.DragAction.COPY);
                eventbox.connect('drag-data-received', (_w, _c, _x, _y, data) => {
                    Hyprland.sendMessage(`dispatch movetoworkspacesilent ${index},address:${data.get_text()}`)
                });
            },
            child: fixed,
        })],
    });
    widget.update = (clients) => {
        clients = clients.filter(({ workspace: { id } }) => id === index);

        // this is for my monitor layout
        // shifts clients back by SCREEN_WIDTHpx if necessary
        clients = clients.map(client => {
            const [x, y] = client.at;
            if (x > SCREEN_WIDTH)
                client.at = [x - SCREEN_WIDTH, y];
            return client;
        });

        const children = fixed.get_children();
        for (let i = 0; i < children.length; i++) {
            const child = children[i];
            child.destroy();
        }
        fixed.put(WorkspaceNumber(index), 0, 0);

        for (let i = 0; i < clients.length; i++) {
            const c = clients[i];
            if (c.mapped) {
                fixed.put(client(c), c.at[0] * OVERVIEW_SCALE, c.at[1] * OVERVIEW_SCALE);
            }
        }



        fixed.show_all();
    };
    return widget;
};

const arr = (s, n) => {
    const array = [];
    for (let i = 0; i < n; i++)
        array.push(s + i);

    return array;
};

const OverviewRow = ({ startWorkspace, workspaces, windowName = 'overview' }) => Widget.Box({
    children: arr(startWorkspace, workspaces).map(workspace),
    attribute: {
        'update': box => {
            if (!App.getWindow(windowName).visible) return;
            execAsync('hyprctl -j clients').then(clients => {
                const json = JSON.parse(clients);
                const children = box.get_children();
                for (let i = 0; i < children.length; i++) {
                    const ch = children[i];
                    ch.update(json)
                }

            }).catch(print);
        }
    },
    setup: (box) => {
        box
            // .hook(Hyprland, (box, name, data) => { // idk, does this make it lag occasionally?
            //     console.log(name)
            //     if (["changefloatingmode", "movewindow"].includes(name))
            //         box.attribute.update(box);
            // }, 'event')
            .hook(Hyprland, (box) => box.attribute.update(box), 'client-added')
            .hook(Hyprland, (box) => box.attribute.update(box), 'client-removed')
            .hook(App, (box, name, visible) => { // Update on open
                if (name == 'overview' && visible) box.attribute.update(box);
            })
    },
});


export default () => {
    const overviewRevealer = Widget.Revealer({
        revealChild: true,
        transition: 'slide_down',
        transitionDuration: 200,
        child: Widget.Box({
            vertical: true,
            className: 'overview-tasks',
            children: [
                OverviewRow({ startWorkspace: 1, workspaces: 5 }),
                OverviewRow({ startWorkspace: 6, workspaces: 5 }),
            ]
        }),
    });
    return overviewRevealer;
};