const { Gio } = imports.gi;
import Widget from 'resource:///com/github/Aylur/ags/widget.js';
import * as Utils from 'resource:///com/github/Aylur/ags/utils.js';
const { Box, Button, Label } = Widget;
import { MaterialIcon } from '../.commonwidgets/materialicon.js';
import { setupCursorHover } from '../.widgetutils/cursorhover.js';

import { TodoWidget } from "./todolist.js";
import { getCalendarLayout } from "./calendar_layout.js";

let calendarJson = getCalendarLayout(undefined, true);
let monthshift = 0;

function getDateInXMonthsTime(x) {
    var currentDate = new Date(); // Get the current date
    var targetMonth = currentDate.getMonth() + x; // Calculate the target month
    var targetYear = currentDate.getFullYear(); // Get the current year

    // Adjust the year and month if necessary
    targetYear += Math.floor(targetMonth / 12);
    targetMonth = (targetMonth % 12 + 12) % 12;

    // Create a new date object with the target year and month
    var targetDate = new Date(targetYear, targetMonth, 1);

    // Set the day to the last day of the month to get the desired date
    // targetDate.setDate(0);

    return targetDate;
}

const weekDays = [ // MONDAY IS THE FIRST DAY OF THE WEEK :HESRIGHTYOUKNOW:
    { day: 'Mo', today: 0 },
    { day: 'Tu', today: 0 },
    { day: 'We', today: 0 },
    { day: 'Th', today: 0 },
    { day: 'Fr', today: 0 },
    { day: 'Sa', today: 0 },
    { day: 'Su', today: 0 },
]

const CalendarDay = (day, today) => Widget.Button({
    className: `sidebar-calendar-btn ${today == 1 ? 'sidebar-calendar-btn-today' : (today == -1 ? 'sidebar-calendar-btn-othermonth' : '')}`,
    child: Widget.Overlay({
        child: Box({}),
        overlays: [Label({
            hpack: 'center',
            className: 'txt-smallie txt-semibold sidebar-calendar-btn-txt',
            label: String(day),
        })],
    })
})

const CalendarWidget = () => {
    const calendarMonthYear = Widget.Button({
        className: 'txt txt-large sidebar-calendar-monthyear-btn',
        onClicked: () => shiftCalendarXMonths(0),
        setup: (button) => {
            button.label = `${new Date().toLocaleString('default', { month: 'long' })} ${new Date().getFullYear()}`;
            setupCursorHover(button);
        }
    });
    const addCalendarChildren = (box, calendarJson) => {
        const children = box.get_children();
        for (let i = 0; i < children.length; i++) {
            const child = children[i];
            child.destroy();
        }
        box.children = calendarJson.map((row, i) => Widget.Box({
            className: 'spacing-h-5',
            children: row.map((day, i) => CalendarDay(day.day, day.today)),
        }))
    }
    function shiftCalendarXMonths(x) {
        if (x == 0) monthshift = 0;
        else monthshift += x;
        var newDate;
        if (monthshift == 0) newDate = new Date();
        else newDate = getDateInXMonthsTime(monthshift);

        calendarJson = getCalendarLayout(newDate, (monthshift == 0));
        calendarMonthYear.label = `${monthshift == 0 ? '' : '• '}${newDate.toLocaleString('default', { month: 'long' })} ${newDate.getFullYear()}`;
        addCalendarChildren(calendarDays, calendarJson);
    }
    const calendarHeader = Widget.Box({
        className: 'spacing-h-5 sidebar-calendar-header',
        setup: (box) => {
            box.pack_start(calendarMonthYear, false, false, 0);
            box.pack_end(Widget.Box({
                className: 'spacing-h-5',
                children: [
                    Button({
                        className: 'sidebar-calendar-monthshift-btn',
                        onClicked: () => shiftCalendarXMonths(-1),
                        child: MaterialIcon('chevron_left', 'norm'),
                        setup: setupCursorHover,
                    }),
                    Button({
                        className: 'sidebar-calendar-monthshift-btn',
                        onClicked: () => shiftCalendarXMonths(1),
                        child: MaterialIcon('chevron_right', 'norm'),
                        setup: setupCursorHover,
                    })
                ]
            }), false, false, 0);
        }
    })
    const calendarDays = Widget.Box({
        hexpand: true,
        vertical: true,
        className: 'spacing-v-5',
        setup: (box) => {
            addCalendarChildren(box, calendarJson);
        }
    });
    return Widget.EventBox({
        onScrollUp: () => shiftCalendarXMonths(-1),
        onScrollDown: () => shiftCalendarXMonths(1),
        child: Widget.Box({
            hpack: 'center',
            children: [
                Widget.Box({
                    hexpand: true,
                    vertical: true,
                    className: 'spacing-v-5',
                    children: [
                        calendarHeader,
                        Widget.Box({
                            homogeneous: true,
                            className: 'spacing-h-5',
                            children: weekDays.map((day, i) => CalendarDay(day.day, day.today))
                        }),
                        calendarDays,
                    ]
                })
            ]
        })
    });
};

const defaultShown = 'calendar';
const contentStack = Widget.Stack({
    hexpand: true,
    children: {
        'calendar': CalendarWidget(),
        'todo': TodoWidget(),
        // 'stars': Widget.Label({ label: 'GitHub feed will be here' }),
    },
    transition: 'slide_up_down',
    transitionDuration: userOptions.animations.durationLarge,
    setup: (stack) => Utils.timeout(1, () => {
        stack.shown = defaultShown;
    })
})

const StackButton = (stackItemName, icon, name) => Widget.Button({
    className: 'button-minsize sidebar-navrail-btn txt-small spacing-h-5',
    onClicked: (button) => {
        contentStack.shown = stackItemName;
        const kids = button.get_parent().get_children();
        for (let i = 0; i < kids.length; i++) {
            if (kids[i] != button) kids[i].toggleClassName('sidebar-navrail-btn-active', false);
            else button.toggleClassName('sidebar-navrail-btn-active', true);
        }
    },
    child: Box({
        className: 'spacing-v-5',
        vertical: true,
        children: [
            Label({
                className: `txt icon-material txt-hugeass`,
                label: icon,
            }),
            Label({
                label: name,
                className: 'txt txt-smallie',
            }),
        ]
    }),
    setup: (button) => Utils.timeout(1, () => {
        setupCursorHover(button);
        button.toggleClassName('sidebar-navrail-btn-active', defaultShown === stackItemName);
    })
});

export const ModuleCalendar = () => Box({
    className: 'sidebar-group spacing-h-5',
    setup: (box) => {
        box.pack_start(Box({
            vpack: 'center',
            homogeneous: true,
            vertical: true,
            className: 'sidebar-navrail spacing-v-10',
            children: [
                StackButton('calendar', 'calendar_month', 'Calendar'),
                StackButton('todo', 'done_outline', 'To Do'),
                // StackButton(box, 'stars', 'star', 'GitHub'),
            ]
        }), false, false, 0);
        box.pack_end(contentStack, false, false, 0);
    }
})