import QtQuick 2.15
import QtQuick.Layouts 1.15
import QtQml 2.15

import StatusQ.Core 0.1
import StatusQ.Core.Theme 0.1
import StatusQ.Controls 0.1
import StatusQ.Components.private 0.1 as SQP
import StatusQ.Core.Utils 0.1 as SQUtils

import SortFilterProxyModel 0.2

StatusComboBox {
    id: root

    readonly property string currentName: control.currentText
    readonly property alias currentAmount: instantiator.amount
    readonly property alias currentMultiplierIndex: instantiator.multiplierIndex
    readonly property alias currentInfiniteAmount: instantiator.infiniteAmount
    readonly property alias currentIcon: instantiator.icon

    type: StatusComboBox.Type.Secondary
    size: StatusComboBox.Size.Small

    height: 48

    control.enabled: !d.oneItem
    control.padding: d.padding
    control.spacing: d.padding
    control.popup.y: 0
    control.popup.padding: 0
    control.popup.verticalPadding: 0
    control.textRole: "name"
    control.currentIndex: 0
    control.indicator.visible: !d.oneItem

    control.background: SQP.StatusComboboxBackground {
        active: false
        visible: !d.oneItem
    }

    QtObject {
        id: d

        readonly property bool oneItem: control.count === 1

        readonly property int padding: 8
        readonly property int radius: 8
        readonly property int fontSize: 13
        readonly property int iconSize: 32

        readonly property string infinitySymbol: "∞"

        function amountText(amount, multiplierIndex) {
            return SQUtils.AmountsArithmetic.toNumber(amount, multiplierIndex)
        }
    }

    component CustomText: StatusBaseText {
        color: Theme.palette.baseColor1
        font.pixelSize: d.fontSize
        font.weight: Font.Medium
        elide: Text.ElideRight
    }

    component DelegateItem: StatusItemDelegate {
        property alias title: titleText.text
        property alias amount: amountText.text
        property alias iconSource: icon.source

        padding: 0
        radius: d.radius

        contentItem: RowLayout {
            spacing: d.padding

            StatusIcon {
                id: icon

                Layout.preferredWidth: d.iconSize
                Layout.preferredHeight: d.iconSize
            }

            CustomText {
                id: titleText

                Layout.fillWidth: true
            }

            CustomText {
                id: amountText
            }
        }
    }

    Instantiator {
        id: instantiator

        property string icon
        property string amount
        property int multiplierIndex
        property bool infiniteAmount

        model: SortFilterProxyModel {
            sourceModel: root.model
            filters: IndexFilter {
                minimumIndex: root.currentIndex
                maximumIndex: root.currentIndex
            }
        }
        delegate: QtObject {
            component Bind: Binding { target: instantiator }
            readonly property list<Binding> bindings: [
                Bind { property: "icon"; value: model.icon },
                Bind { property: "amount"; value: model.amount },
                Bind { property: "multiplierIndex"; value: model.multiplierIndex },
                Bind { property: "infiniteAmount"; value: model.infiniteAmount }
            ]
        }
    }

    contentItem: DelegateItem {
        title: root.control.displayText
        iconSource: instantiator.icon

        amount: {
            if (d.oneItem || !instantiator.amount)
                return ""

            if (instantiator.infiniteAmount)
                return d.infinitySymbol

            return d.amountText(instantiator.amount,
                                instantiator.multiplierIndex)
        }

        cursorShape: d.oneItem ? Qt.ArrowCursor : Qt.PointingHandCursor

        onClicked: {
            if (root.oneItem)
                return

            root.control.popup.open()
        }
    }

    delegate: DelegateItem {
        title: model.name
        iconSource: model.icon
        amount: model.infiniteAmount
                ? d.infinitySymbol
                : d.amountText(model.amount, model.multiplierIndex)

        width: root.width
        height: root.height
        horizontalPadding: d.padding

        highlighted: root.control.highlightedIndex === index

        onClicked: {
            root.currentIndex = index
            root.control.popup.close()
        }
    }
}