// Copyright (c) 2014-2018, The Monero Project
// 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
// 
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
// 
// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import QtQuick 2.9
import QtQuick.Controls 2.2
import QtGraphicalEffects 1.0

import "../components" as MoneroComponents
import "../components/effects/" as MoneroEffects

Item {
    id: dropdown
    property int itemTopMargin: 0
    property alias dataModel: repeater.model
    property string shadowPressedColor
    property string shadowReleasedColor
    property string pressedColor: MoneroComponents.Style.appWindowBorderColor
    property string releasedColor: MoneroComponents.Style.titleBarButtonHoverColor
    property string textColor: MoneroComponents.Style.defaultFontColor
    property alias currentIndex: columnid.currentIndex
    readonly property alias expanded: popup.visible
    property int dropdownHeight: 42
    property int fontHeaderSize: 16
    property int fontItemSize: 14
    property string colorBorder: MoneroComponents.Style.inputBorderColorInActive
    property string colorHeaderBackground: "transparent"
    property bool headerBorder: true
    property bool headerFontBold: false

    height: dropdownHeight

    signal changed();

    onExpandedChanged: if(expanded) appWindow.currentItem = dropdown

    // Workaroud for suspected memory leak in 5.8 causing malloc crash on app exit
    function update() {
        firstColText.text = columnid.currentIndex < repeater.model.rowCount() ? qsTr(repeater.model.get(columnid.currentIndex).column1) + translationManager.emptyString : ""
    }

    Item {
        id: head
        anchors.left: parent.left
        anchors.right: parent.right
        anchors.top: parent.top
        anchors.topMargin: parent.itemTopMargin
        height: dropdown.dropdownHeight

        Rectangle {
            color: "transparent"
            border.width: dropdown.headerBorder ? 1 : 0
            border.color: dropdown.colorBorder
            radius: 4
            anchors.fill: parent
        }

        MoneroComponents.TextPlain {
            id: firstColText
            anchors.verticalCenter: parent.verticalCenter
            anchors.left: parent.left
            anchors.leftMargin: 12
            elide: Text.ElideRight
            font.family: MoneroComponents.Style.fontRegular.name
            font.bold: dropdown.headerFontBold
            font.pixelSize: dropdown.fontHeaderSize
            color: dropdown.textColor
        }

        Item {
            id: dropIndicator
            anchors.top: parent.top
            anchors.bottom: parent.bottom
            anchors.right: parent.right
            width: 32

            Image {
                id: dropdownIcon
                anchors.centerIn: parent
                source: "qrc:///images/whiteDropIndicator.png"
                visible: false
            }

            ColorOverlay {
                source: dropdownIcon
                anchors.fill: dropdownIcon
                color: MoneroComponents.Style.defaultFontColor
                rotation: dropdown.expanded ? 180  : 0
                opacity: 1
            }
        }

        MouseArea {
            id: dropArea
            anchors.fill: parent
            onClicked: dropdown.expanded ? popup.close() : popup.open()
            hoverEnabled: true
            cursorShape: Qt.PointingHandCursor
        }
    }

    Popup {
        id: popup
        padding: 0
        closePolicy: Popup.CloseOnEscape | Popup.CloseOnPressOutsideParent

        Rectangle {
            id: droplist
            x: dropdown.x
            width: dropdown.width
            y: head.y + head.height
            clip: true
            height: dropdown.expanded ? columnid.height : 0
            color: dropdown.pressedColor

            Behavior on height {
                NumberAnimation { duration: 100; easing.type: Easing.InQuad }
            }

            Column {
                id: columnid
                anchors.left: parent.left
                anchors.right: parent.right
                anchors.top: parent.top
                property int currentIndex: 0

                Repeater {
                    id: repeater

                    // Workaround for translations in listElements. All translated strings needs to be listed in this file.
                    property string stringAutomatic: qsTr("Automatic") + translationManager.emptyString
                    property string stringSlow: qsTr("Slow (x0.2 fee)") + translationManager.emptyString
                    property string stringNormal: qsTr("Normal (x1 fee)")  + translationManager.emptyString
                    property string stringFast: qsTr("Fast (x5 fee)")  + translationManager.emptyString
                    property string stringFastest: qsTr("Fastest (x200 fee)") + translationManager.emptyString

                    delegate: Rectangle {
                        anchors.left: parent.left
                        anchors.right: parent.right
                        height: (dropdown.dropdownHeight * 0.75)
                        //radius: index === repeater.count - 1 ? 4 : 0
                        color: itemArea.containsMouse || index === columnid.currentIndex || itemArea.containsMouse ? dropdown.releasedColor : dropdown.pressedColor

                        MoneroComponents.TextPlain {
                            id: col1Text
                            anchors.verticalCenter: parent.verticalCenter
                            anchors.left: parent.left
                            anchors.right: col2Text.left
                            anchors.leftMargin: 12
                            anchors.rightMargin: 0
                            font.family: MoneroComponents.Style.fontRegular.name
                            font.bold: true
                            font.pixelSize: fontItemSize
                            color: itemArea.containsMouse || index === columnid.currentIndex || itemArea.containsMouse ? "#FA6800" : "#FFFFFF"
                            text: qsTr(column1) + translationManager.emptyString
                        }

                        MoneroComponents.TextPlain {
                            id: col2Text
                            anchors.verticalCenter: parent.verticalCenter
                            anchors.right: parent.right
                            anchors.rightMargin: 45
                            font.family: MoneroComponents.Style.fontRegular.name
                            font.pixelSize: 14
                            color: "#FFFFFF"
                            text: ""
                        }

                        Rectangle {
                            anchors.left: parent.left
                            anchors.top: parent.top
                            width: 3; height: 3
                            color: parent.color
                        }

                        Rectangle {
                            anchors.right: parent.right
                            anchors.top: parent.top
                            width: 3; height: 3
                            color: parent.color
                        }

                        MouseArea {
                            id: itemArea
                            anchors.fill: parent
                            hoverEnabled: true
                            cursorShape: Qt.PointingHandCursor

                            onClicked: {
                                popup.close()
                                columnid.currentIndex = index
                                changed();
                                dropdown.update()
                            }
                        }
                    }
                }
            }
        }
    }
}