const hyprland = await Service.import('hyprland');

import { bash } from 'lib/utils';
import { Widget as TWidget } from 'types/@girs/gtk-3.0/gtk-3.0.cjs';
import { Monitor } from 'types/service/hyprland';
import Box from 'types/widgets/box';
import EventBox from 'types/widgets/eventbox';
import Revealer from 'types/widgets/revealer';

type NestedRevealer = Revealer<Box<TWidget, unknown>, unknown>;
type NestedBox = Box<NestedRevealer, unknown>;
type NestedEventBox = EventBox<NestedBox, unknown>;

const { location } = options.theme.bar;

export const moveBoxToCursor = <T extends NestedEventBox>(self: T, fixed: boolean): void => {
    if (fixed) {
        return;
    }

    globalMousePos.connect('changed', async ({ value }) => {
        const curHyprlandMonitor = hyprland.monitors.find((m) => m.id === hyprland.active.monitor.id);
        const dropdownWidth = self.child.get_allocation().width;
        const dropdownHeight = self.child.get_allocation().height;

        let hyprScaling = 1;
        try {
            const monitorInfo = await bash('hyprctl monitors -j');
            const parsedMonitorInfo = JSON.parse(monitorInfo);

            const foundMonitor = parsedMonitorInfo.find(
                (monitor: Monitor) => monitor.id === hyprland.active.monitor.id,
            );
            hyprScaling = foundMonitor?.scale || 1;
        } catch (error) {
            console.error(`Error parsing hyprland monitors: ${error}`);
        }

        let monWidth = curHyprlandMonitor?.width;
        let monHeight = curHyprlandMonitor?.height;

        if (monWidth === undefined || monHeight === undefined || hyprScaling === undefined) {
            return;
        }

        // If GDK Scaling is applied, then get divide width by scaling
        // to get the proper coordinates.
        // Ex: On a 2860px wide monitor... if scaling is set to 2, then the right
        // end of the monitor is the 1430th pixel.
        const gdkScale = Utils.exec('bash -c "echo $GDK_SCALE"');

        if (/^\d+(.\d+)?$/.test(gdkScale)) {
            const scale = parseFloat(gdkScale);
            monWidth = monWidth / scale;
            monHeight = monHeight / scale;
        } else {
            monWidth = monWidth / hyprScaling;
            monHeight = monHeight / hyprScaling;
        }

        // If monitor is vertical (transform = 1 || 3) swap height and width
        const isVertical = curHyprlandMonitor?.transform !== undefined ? curHyprlandMonitor.transform % 2 !== 0 : false;

        if (isVertical) {
            [monWidth, monHeight] = [monHeight, monWidth];
        }

        let marginRight = monWidth - dropdownWidth / 2;
        marginRight = fixed ? marginRight - monWidth / 2 : marginRight - value[0];
        let marginLeft = monWidth - dropdownWidth - marginRight;

        const minimumMargin = 0;

        if (marginRight < minimumMargin) {
            marginRight = minimumMargin;
            marginLeft = monWidth - dropdownWidth - minimumMargin;
        }

        if (marginLeft < minimumMargin) {
            marginLeft = minimumMargin;
            marginRight = monWidth - dropdownWidth - minimumMargin;
        }

        self.set_margin_left(marginLeft);
        self.set_margin_right(marginRight);

        if (location.value === 'top') {
            self.set_margin_top(0);
            self.set_margin_bottom(monHeight);
        } else {
            self.set_margin_bottom(0);
            self.set_margin_top(monHeight - dropdownHeight);
        }
    });
};