import QtQuick 2.13
import QtQuick.Layouts 1.14
import QtQuick.Controls 2.13
import QtGraphicalEffects 1.13

import StatusQ.Core 0.1
import StatusQ.Core.Theme 0.1
import StatusQ.Controls 0.1
import StatusQ.Components 0.1

import utils 1.0

StatusListView {
    id: root

    property var checkedKeys: []

    property string footerButtonText

    property var headerModel
    property bool areHeaderButtonsVisible: true
    property bool isFooterButtonVisible: true
    property bool areSectionsVisible: true

    property bool searchMode: false
    property bool availableData: false
    property string noDataText: qsTr("No data found")

    property int maxHeight: 381 // default by design

    signal headerItemClicked(string key)
    signal itemClicked(var key, string name, var shortName,  url iconSource, var subItems)

    signal footerButtonClicked

    implicitWidth: 273
    implicitHeight: Math.min(contentHeight, root.maxHeight)
    currentIndex: -1
    leftMargin: d.padding
    rightMargin: 14 // scrollbar width

    header: ColumnLayout {
        width: root.availableWidth

        spacing: 0

        Item {
            Layout.fillWidth: true
            Layout.preferredHeight: root.areHeaderButtonsVisible
                                    ? columnHeader.implicitHeight + 2 * columnHeader.anchors.topMargin
                                    : 0

            visible: root.areHeaderButtonsVisible
            z: 3 // Above delegate (z=1) and above section.delegate (z = 2)

            ColumnLayout {
                id: columnHeader

                anchors.top: parent.top
                anchors.left: parent.left
                anchors.leftMargin: 6
                anchors.rightMargin: anchors.leftMargin
                anchors.topMargin: 8
                anchors.bottomMargin: 2 * anchors.topMargin
                spacing: 20
                Repeater {
                    model: root.headerModel
                    delegate: StatusIconTextButton {
                        z: 3 // Above delegate (z=1) and above section.delegate (z = 2)
                        spacing: model.spacing
                        statusIcon: model.icon
                        icon.width: model.iconSize
                        icon.height: model.iconSize
                        iconRotation: model.rotation
                        text: model.description
                        onClicked: root.headerItemClicked(model.index)
                    }
                }
            }
        }

        Loader {
            Layout.preferredHeight: visible ? d.sectionHeight : 0
            Layout.fillWidth: true

            visible: !root.availableData || root.searchMode
            sourceComponent: sectionComponent
        }
    }

    delegate: TokenItem {
        width: root.availableWidth

        name: model.name
        shortName: model.shortName ?? ""
        iconSource: model.iconSource ?? ""
        showSubItemsIcon: !!model.subItems && model.subItems.count > 0
        selected: root.checkedKeys.includes(model.key)
        amount: !!model.infiniteSupply ? "∞" : model.supply ?? ""

        onItemClicked: root.itemClicked(
                           model.key, name, shortName, iconSource, model.subItems)
    }

    section.property: root.searchMode || !root.areSectionsVisible
                      ? "" : "categoryLabel"
    section.delegate: ColumnLayout {
        width: root.availableWidth
        height: root.searchMode || root.areSectionsVisible ? d.sectionHeight : 0
        spacing: 0

        Rectangle {
            Layout.fillWidth: true
            Layout.fillHeight: true
            color: Theme.palette.statusListItem.backgroundColor

            Loader {
                id: loader
                anchors.fill: parent
                sourceComponent: sectionComponent

                Binding {
                    target: loader.item
                    property: "section"
                    value: section
                    when: !root.searchMode
                }
            }
        }

        // floating divider
        Rectangle {
            visible: parent.y === root.contentY && (root.searchMode || root.areSectionsVisible)
            Layout.fillWidth: true
            Layout.leftMargin: -d.padding
            Layout.rightMargin: -d.padding*2
            Layout.preferredHeight: 4
            color: Theme.palette.directColor8
        }
    }
    section.labelPositioning: ViewSection.InlineLabels | ViewSection.CurrentLabelAtStart

    Component {
        id: footerComponent

        Item {
            width: ListView.view ? ListView.view.width - Style.current.smallPadding : 0
            height: d.sectionHeight

            Loader {
                id: footerLoader

                anchors.fill: parent
                sourceComponent: sectionComponent

                Binding {
                    target: footerLoader.item
                    property: "section"
                    value: root.footerButtonText
                }

                StatusIcon {
                    anchors.verticalCenter: parent.verticalCenter
                    anchors.right: parent.right
                    anchors.rightMargin: 16

                    icon: "tiny/chevron-right"
                    color: Theme.palette.baseColor1
                    width: 16
                    height: 16
                }

                MouseArea {
                    anchors.fill: parent
                    cursorShape: Qt.PointingHandCursor

                    onClicked: root.footerButtonClicked()
                }
            }
        }
    }

    footer: root.isFooterButtonVisible ? footerComponent : null

    QtObject {
        id: d

        readonly property int padding: Style.current.halfPadding
        readonly property int sectionHeight: 34
    }

    Component {
        id: sectionComponent

        Item {
            id: sectionDelegateRoot

            property string section: {
                if(!root.availableData)
                    return root.noDataText
                if(root.count)
                    return qsTr("Search results")
                return qsTr("No results")
            }

            StatusBaseText {
                anchors.leftMargin: Style.current.halfPadding
                anchors.left: parent.left
                anchors.verticalCenter: parent.verticalCenter
                width: parent.width - anchors.leftMargin
                text: sectionDelegateRoot.section
                color: Theme.palette.baseColor1
                font.pixelSize: 12
                elide: Text.ElideRight
                wrapMode: Text.WordWrap
                lineHeight: 1.2
            }
        }
    }
}