import QtQuick 2.13
import QtQuick.Controls 2.13
import QtQuick.Layouts 1.13

import SortFilterProxyModel 0.2

import StatusQ.Core 0.1
import StatusQ.Core.Theme 0.1
import StatusQ.Core.Utils 0.1
import StatusQ.Controls 0.1
import StatusQ.Components 0.1
import StatusQ.Core.Backpressure 1.0

import shared.controls 1.0
import utils 1.0

import utils 1.0

import "../controls"

Item {
    id: root

    property var assets
    property var selectedAsset
    property string defaultToken
    property string userSelectedToken
    property string currentCurrencySymbol
    property string placeholderText

    property var tokenAssetSourceFn: function (symbol) {
        return ""
    }
    property var searchTokenSymbolByAddressFn: function (address) {
        return ""
    }
    property var getNetworkIcon: function(chainId){
        return ""
    }

    function resetInternal() {
        assets = null
        selectedAsset = null
    }

    implicitWidth: comboBox.width
    implicitHeight: comboBox.implicitHeight

    onSelectedAssetChanged: {
        if (selectedAsset && selectedAsset.symbol) {
            d.iconSource = tokenAssetSourceFn(selectedAsset.symbol.toUpperCase())
            d.text = selectedAsset.symbol.toUpperCase()
        }
    }

    QtObject {
        id: d
        property string iconSource: ""
        property string text: ""
        property string searchString
        property bool isTokenSelected: !!root.selectedAsset

        readonly property var updateSearchText: Backpressure.debounce(root, 1000, function(inputText) {
            d.searchString = inputText
        })
    }

    StatusComboBox {
        id: comboBox
        objectName: "assetSelectorButton"
        width: d.isTokenSelected ? rowLayout.implicitWidth : 116
        height: 34

        control.padding: 4
        control.popup.width: 492
        control.popup.height: 416
        control.popup.x: -root.x
        
        popupContentItemObjectName: "assetSelectorList"

        model : SortFilterProxyModel {
            sourceModel: root.assets
            filters: [
                ExpressionFilter {
                    expression: {
                        var tokenSymbolByAddress = searchTokenSymbolByAddressFn(d.searchString)
                        return visibleForNetwork && (
                            symbol.startsWith(d.searchString.toUpperCase()) || name.toUpperCase().startsWith(d.searchString.toUpperCase()) || (tokenSymbolByAddress!=="" && symbol.startsWith(tokenSymbolByAddress))
                        )
                    }
                }
            ]
        }

        control.background: Rectangle {
            color: "transparent"
            border.width: d.isTokenSelected ? 0 : 1
            border.color: d.isTokenSelected ? "transparent" : Theme.palette.directColor7
            radius: 12
        }

        contentItem: RowLayout {
            id: rowLayout
            StatusRoundedImage {
                Layout.preferredWidth: 21
                Layout.preferredHeight: 21
                Layout.alignment: Qt.AlignVCenter | Qt.AlignLeft
                visible: !!d.iconSource
                image.source: d.iconSource
                image.onStatusChanged: {
                    if (image.status === Image.Error) {
                        image.source = defaultToken
                    }
                }
            }
            StatusBaseText {
                Layout.alignment: Qt.AlignVCenter
                font.pixelSize: 28
                elide: Text.ElideRight
                verticalAlignment: Text.AlignVCenter
                color: Theme.palette.miscColor1
                text: d.text
                visible: d.isTokenSelected
            }
            StatusIcon {
                Layout.leftMargin: -3
                Layout.alignment: Qt.AlignVCenter
                icon: "chevron-down"
                width: 16
                height: 16
                color: Theme.palette.miscColor1
                visible: d.isTokenSelected
            }
            StatusBaseText {
                Layout.maximumWidth: comboBox.width - Style.current.padding
                Layout.alignment: Qt.AlignCenter
                visible: !d.isTokenSelected
                font.pixelSize: 15
                font.weight: Font.Medium
                verticalAlignment: Text.AlignVCenter
                color: Theme.palette.baseColor1
                elide: Qt.ElideRight
                text: placeholderText
            }
        }

        control.indicator: null

        delegate: TokenBalancePerChainDelegate {
            objectName: "AssetSelector_ItemDelegate_" + symbol
            width: comboBox.control.popup.width
            getNetworkIcon: root.getNetworkIcon
            onTokenSelected: {
                userSelectedToken = selectedToken.symbol
                selectedAsset = selectedToken
                comboBox.control.popup.close()
            }
        }

        Component.onCompleted: {
            control.currentIndex = -1
            control.popup.contentItem.header = searchBox
        }

        control.popup.onOpened: {
            control.currentIndex = -1
        }
    }

    Component {
        id: searchBox
        StatusInput {
            width: parent.width
            input.showBackground: false
            placeholderText: qsTr("Search for token or enter token address")
            onTextChanged: Qt.callLater(d.updateSearchText, text)
            input.clearable: true
            input.rightComponent: StatusIcon {
                width: 16
                height: 16
                color: Theme.palette.baseColor1
                icon: "search"
            }
            Rectangle {
                anchors.bottom: parent.bottom
                height: 1
                width: parent.width
                color: Theme.palette.baseColor2
            }
        }
    }
}