// CalendarComponent.qml (For one month)
import QtQuick
import qs.Common
import qs.Common.Styled

Item {
    id: root

    property int targetYear: new Date().getFullYear()
    property int targetMonth: new Date().getMonth() // 0-11
    property date currentDate: new Date()

    function getLocalizedDayHeaders() {
        const locale = Qt.locale();
        const headers = [];

        const firstDay = locale.firstDayOfWeek;

        for (let i = 0; i < 7; i++) {
            const dayIndex = (firstDay + i) % 7;

            const dayDate = new Date(1970, 0, 4 + dayIndex);
            headers.push(dayDate.toLocaleString(locale, "ddd").substring(0, 1));
        }
        return headers;
    }
    function getMonthLayout(year, month) {
        let date = new Date(year, month, 1);
        let firstDayOfWeek = date.getDay();

        let daysInMonth = new Date(year, month + 1, 0).getDate();
        let days = [];

        for (let i = 0; i < firstDayOfWeek; i++) {
            days.push("");
        }

        for (let i = 1; i <= daysInMonth; i++) {
            days.push(i);
        }

        while (days.length % 7 !== 0) {
            days.push("");
        }

        return {
            monthName: date.toLocaleString(Qt.locale(), "MMMM yyyy"),
            days: days
        };
    }

    readonly property var layoutData: getMonthLayout(targetYear, targetMonth)

    implicitWidth: childrenRect.width
    implicitHeight: childrenRect.height

    Column {
        spacing: 5

        // Month Title
        StyledText {
            text: root.layoutData.monthName
            font.bold: true
            horizontalAlignment: Text.AlignHCenter
            width: parent.width
            font.family: Theme.fontFamilyMono
        }

        Grid {
            columns: 7
            rowSpacing: 2
            columnSpacing: 5

            Repeater {
                model: root.getLocalizedDayHeaders()
                StyledText {
                    text: modelData
                    horizontalAlignment: Text.AlignHCenter
                    width: 18
                    font.family: Theme.fontFamilyMono
                }
            }

            Repeater {
                model: root.layoutData.days
                StyledText {
                    text: modelData
                    horizontalAlignment: Text.AlignHCenter
                    width: 18
                    font.family: Theme.fontFamilyMono

                    color: {
                        let isCurrentMonth = root.targetYear === root.currentDate.getFullYear() && root.targetMonth === root.currentDate.getMonth();
                        let isCurrentDay = isCurrentMonth && modelData === root.currentDate.getDate();

                        return isCurrentDay ? Theme.color5Bright : Theme.textColor;
                    }
                }
            }
        }
    }
}