import Hyprland from 'resource:///com/github/Aylur/ags/service/hyprland.js';
import Service from 'resource:///com/github/Aylur/ags/service.js';
import TouchGestures from './touch-gestures.js';
import { execAsync, subprocess } from 'resource:///com/github/Aylur/ags/utils.js';
import GUdev from 'gi://GUdev';

const ROTATION_MAP = {
    'normal': 0,
    'right-up': 3,
    'bottom-up': 2,
    'left-up': 1,
};
const SCREEN = 'desc:BOE 0x0964';


class Tablet extends Service {
    static {
        Service.register(this, {
            'device-fetched': ['boolean'],
            'autorotate-started': ['boolean'],
            'autorotate-destroyed': ['boolean'],
            'inputs-blocked': ['boolean'],
            'inputs-unblocked': ['boolean'],
            'laptop-mode': ['boolean'],
            'tablet-mode': ['boolean'],
            'mode-toggled': ['boolean'],
            'osk-toggled': ['boolean'],
        });
    }

    #tabletMode = false;
    #oskState = false;
    #autorotate;
    #blockedInputs;
    #udevClient = GUdev.Client.new(['input']);

    get tabletMode() {
        return this.#tabletMode;
    }

    get oskState() {
        return this.#oskState;
    }

    constructor() {
        super();
        this.#initUdevConnection();
        this.#listenOskState();
    }

    #blockInputs() {
        if (this.#blockedInputs) {
            return;
        }

        this.#blockedInputs = subprocess(['libinput', 'debug-events', '--grab',
            '--device', '/dev/input/by-path/platform-i8042-serio-0-event-kbd',
            '--device', '/dev/input/by-path/platform-i8042-serio-1-event-mouse',
            '--device', '/dev/input/by-path/platform-AMDI0010:02-event-mouse',
            '--device', '/dev/input/by-path/platform-thinkpad_acpi-event',
            '--device', '/dev/video-bus'],
        () => { /**/ },
        (err) => logError(err));
        this.emit('inputs-blocked', true);
    }

    #unblockInputs() {
        if (this.#blockedInputs) {
            this.#blockedInputs.force_exit();
            this.#blockedInputs = null;
            this.emit('inputs-unblocked', true);
        }
    }

    setTabletMode() {
        execAsync(['gsettings', 'set', 'org.gnome.desktop.a11y.applications',
            'screen-keyboard-enabled', 'true']).catch(print);

        execAsync(['brightnessctl', '-d', 'tpacpi::kbd_backlight', 's', '0'])
            .catch(print);

        this.startAutorotate();
        this.#blockInputs();

        this.#tabletMode = true;
        this.emit('tablet-mode', true);
        this.emit('mode-toggled', true);
    }

    setLaptopMode() {
        execAsync(['gsettings', 'set', 'org.gnome.desktop.a11y.applications',
            'screen-keyboard-enabled', 'false']).catch(print);

        execAsync(['brightnessctl', '-d', 'tpacpi::kbd_backlight', 's', '2'])
            .catch(print);

        this.killAutorotate();
        this.#unblockInputs();

        this.#tabletMode = false;
        this.emit('laptop-mode', true);
        this.emit('mode-toggled', true);
    }

    toggleMode() {
        if (this.#tabletMode) {
            this.setLaptopMode();
        }
        else {
            this.setTabletMode();
        }

        this.emit('mode-toggled', true);
    }

    #initUdevConnection() {
        this.#getDevices();
        this.#udevClient.connect('uevent', (_, action) => {
            if (action === 'add' || action === 'remove') {
                this.#getDevices();
            }
        });
    }

    #getDevices() {
        this.devices = [];
        Hyprland.sendMessage('j/devices').then((out) => {
            const devices = JSON.parse(out);

            devices.touch.forEach((dev) => {
                this.devices.push(dev.name);
            });
            devices.tablets.forEach((dev) => {
                this.devices.push(dev.name);
            });
        }).catch(print);

        this.emit('device-fetched', true);
    }

    startAutorotate() {
        if (this.#autorotate) {
            return;
        }

        this.#autorotate = subprocess(
            ['monitor-sensor'],
            (output) => {
                if (output.includes('orientation changed')) {
                    const orientation = ROTATION_MAP[output.split(' ').at(-1)];

                    Hyprland.sendMessage(
                        `keyword monitor ${SCREEN},transform,${orientation}`,
                    ).catch(print);

                    const batchRotate = this.devices.map((dev) =>
                        `keyword device:${dev}:transform ${orientation}; `);

                    Hyprland.sendMessage(`[[BATCH]] ${batchRotate.flat()}`);

                    if (TouchGestures.gestureDaemon) {
                        TouchGestures.killDaemon();
                        TouchGestures.startDaemon();
                    }
                }
            },
            (err) => logError(err),
        );
        this.emit('autorotate-started', true);
    }

    killAutorotate() {
        if (this.#autorotate) {
            this.#autorotate.force_exit();
            this.#autorotate = null;
            this.emit('autorotate-destroyed', true);
        }
    }

    #listenOskState() {
        subprocess(
            ['bash', '-c', 'busctl monitor --user sm.puri.OSK0'],
            (output) => {
                if (output.includes('BOOLEAN')) {
                    this.#oskState = output.match('true|false')[0] === 'true';
                    this.emit('osk-toggled', this.#oskState);
                }
            },
            (err) => logError(err),
        );
    }

    static openOsk() {
        execAsync(['busctl', 'call', '--user',
            'sm.puri.OSK0', '/sm/puri/OSK0', 'sm.puri.OSK0',
            'SetVisible', 'b', 'true'])
            .catch(print);
    }

    static closeOsk() {
        execAsync(['busctl', 'call', '--user',
            'sm.puri.OSK0', '/sm/puri/OSK0', 'sm.puri.OSK0',
            'SetVisible', 'b', 'false'])
            .catch(print);
    }

    toggleOsk() {
        if (this.#oskState) {
            Tablet.closeOsk();
        }
        else {
            Tablet.openOsk();
        }
    }
}

const tabletService = new Tablet();

export default tabletService;