import QtQuick 2.14
import QtQuick.Controls 2.14
import QtQuick.Layouts 1.14
import QtGraphicalEffects 1.0

import StatusQ.Core 0.1
import StatusQ.Controls 0.1
import StatusQ.Core.Theme 0.1
import StatusQ.Core.Utils 0.1
import StatusQ.Popups.Dialog 0.1

Item {
    id: root

    property alias model: listView.model
    property alias delegate: listView.delegate

    property alias suggestionsModel: suggestionsListView.model
    property alias suggestionsDelegate: suggestionsListView.delegate

    readonly property alias label: label
    readonly property alias warningLabel: warningLabel
    readonly property alias edit: edit

    signal confirmed()
    signal rejected()

    signal entryAccepted(var suggestionsDelegate)
    signal entryRemoved(var delegate)

    implicitWidth: mainLayout.implicitWidth
    implicitHeight: mainLayout.implicitHeight

    RowLayout {
        id: mainLayout

        spacing: 8

        anchors.fill: parent

        Rectangle {
            Layout.fillWidth: true
            Layout.preferredHeight: 44
            color: Theme.palette.baseColor2
            radius: 8

            RowLayout {
                anchors {
                    fill: parent
                    leftMargin: 16
                    rightMargin: 16
                    topMargin: 7
                    bottomMargin: 7
                }

                StatusBaseText {
                    id: label

                    Layout.alignment: Qt.AlignVCenter
                    visible: text !== ""
                    font.pixelSize: 15
                    color: Theme.palette.baseColor1
                }

                Item {
                    Layout.fillWidth: true
                    Layout.fillHeight: true

                    StatusScrollView {
                        id: scrollView

                        anchors.fill: parent

                        padding: 0

                        onContentWidthChanged: {
                            if (scrollView.contentWidth > scrollView.width) {
                                scrollView.contentX = scrollView.contentWidth - scrollView.width
                            } else {
                                scrollView.contentX = 0
                            }
                        }

                        RowLayout {
                            height: scrollView.height

                            spacing: 8

                            StatusListView {
                                id: listView

                                Layout.fillWidth: true
                                Layout.fillHeight: true
                                implicitWidth: contentWidth

                                orientation: ListView.Horizontal
                                spacing: 8
                            }

                            TextInput {
                                id: edit

                                Layout.fillHeight: true
                                Layout.minimumWidth: 4

                                verticalAlignment: Text.AlignVCenter
                                font.pixelSize: 15
                                color: Theme.palette.directColor1

                                cursorDelegate: Rectangle {
                                    color: Theme.palette.primaryColor1
                                    implicitWidth: 2
                                    radius: 1
                                    visible: edit.cursorVisible

                                    SequentialAnimation on visible {
                                        loops: Animation.Infinite
                                        running: edit.cursorVisible
                                        PropertyAnimation { to: false; duration: 600; }
                                        PropertyAnimation { to: true; duration: 600; }
                                    }
                                }

                                Keys.onPressed: {
                                    if (suggestionsDialog.visible) {
                                        if (event.key === Qt.Key_Return || event.key === Qt.Key_Enter) {
                                            root.entryAccepted(suggestionsListView.itemAtIndex(suggestionsListView.currentIndex))
                                        } else if (event.key === Qt.Key_Up) {
                                            suggestionsListView.decrementCurrentIndex()
                                        } else if (event.key === Qt.Key_Down) {
                                            suggestionsListView.incrementCurrentIndex()
                                        }
                                    } else {
                                        if (event.key === Qt.Key_Backspace && edit.text === "") {
                                            root.entryRemoved(listView.itemAtIndex(listView.count - 1))
                                        } else if (event.key === Qt.Key_Return || event.key === Qt.Enter)  {
                                            root.confirmed()
                                        } else if (event.key === Qt.Key_Escape)  {
                                            root.rejected()
                                        }
                                    }
                                }
                            }

                            // ensure edit cursor is visible
                            Item {
                                Layout.fillHeight: true
                                implicitWidth: 1
                            }
                        }

                        ScrollBar.horizontal: StatusScrollBar {
                            id: scrollBar
                            parent: scrollView.parent
                            anchors.top: scrollView.bottom
                            anchors.left: scrollView.left
                            anchors.right: scrollView.right
                            policy: ScrollBar.AsNeeded
                            visible: resolveVisibility(policy, scrollView.width, scrollView.contentWidth)
                        }
                    }
                }

                StatusBaseText {
                    id: warningLabel

                    Layout.alignment: Qt.AlignVCenter
                    visible: text !== ""
                    font.pixelSize: 10
                    color: Theme.palette.dangerColor1
                }
            }

            MouseArea {
                anchors.fill: parent
                propagateComposedEvents: true

                onPressed: {
                    edit.forceActiveFocus()
                    mouse.accepted = false
                }
            }
        }

        StatusButton {
            Layout.leftMargin: 10
            text: qsTr("Confirm")

            onClicked: root.confirmed()
        }

        StatusButton {
            text: qsTr("Reject")
            type: StatusBaseButton.Type.Danger

            onClicked: root.rejected()
        }
    }

    Popup {
        id: suggestionsDialog

        visible: edit.text !== "" && root.suggestionsModel.count

        parent: edit
        y: parent.height

        padding: 8

        background: StatusDialogBackground {
            id: bg
            layer.enabled: true
            layer.effect: DropShadow {
                source: bg
                horizontalOffset: 0
                verticalOffset: 4
                radius: 12
                samples: 25
                spread: 0.2
                color: Theme.palette.dropShadow
            }
        }

        StatusListView {
            id: suggestionsListView

            anchors.fill: parent
            implicitWidth: contentItem.childrenRect.width
            implicitHeight: contentItem.childrenRect.height

            onVisibleChanged: currentIndex = 0
        }
    }
}