/*
 * This file is part of the Flowee project
 * Copyright (C) 2024 Tom Zander <tom@flowee.org>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
import QtQuick;
import QtQuick.Controls as QQC2;
import QtQuick.Layouts;
import "../mobile" as Mobile;
import "../Flowee" as Flowee;
import Flowee.org.pay;
import Flowee.org.pay.bigtransfer;

Mobile.Page {
    id: root
    required property QtObject transferManager;
    headerText: qsTr("Verify %1 Transactions", "", reviewList.model.length)
                    .arg(transferManager.transactions.length);

    ListView {
        id: reviewList
        width: parent.width
        anchors.top: parent.top
        anchors.bottom: infoLabel.top
        anchors.bottomMargin: 20
        clip: true
        model: root.transferManager.transactions
        delegate: Rectangle {
            id: delegateRoot
            width: ListView.view.width
            color: (index % 2) === 0 ? palette.base : palette.alternateBase
            height: Math.max(address.y + address.height, outputSelector.y + outputSelector.height) + 10
            property int offset: modelData.sent ? 80 : 0
            opacity: {
                if (helpText.opacity > 0 && (dragItem.x === 0 || dragItem > 260))
                    return 0.8 - helpText.opacity / 2;
                return 1;
            }
            Flowee.Label {
                id: topRow
                text: index + 1 + ")"
                y: 5
                x: parent.offset
            }
            Flowee.BitcoinAmountLabel {
                id: amountLabel
                y: 5
                x: topRow.width + topRow.x + 6
                value: modelData.value
            }

            Item {
                id: dragItem
                width: parent.width
                height: parent.height

                onXChanged: {
                    var absX = Math.abs(x);
                    delegateRoot.offset = x / 2
                    if (absX > 250) {
                        root.transferManager.send(modelData);
                        helpText.visible = false;
                        delegateRoot.offset = 80
                    }
                    helpText.opacity = absX / 200
                }

                DragHandler {
                    id: dragHandler
                    yAxis.enabled: false
                    xAxis.enabled: true
                    xAxis.maximum: 270 // swipe left
                    xAxis.minimum: -270 // swipe right
                    enabled: !modelData.sent
                    onActiveChanged: {
                        if (active) {
                            var rect = Qt.rect(0, 0, delegateRoot.width, delegateRoot.height);
                            var convertedRect = helpText.mapFromItem(delegateRoot, rect);
                            helpText.base = convertedRect;
                            helpText.visible = true;
                        } else {
                            parent.x = 0;
                            delegateRoot.offset = modelData.sent ? 80 : 0;
                        }
                    }
                }
            }

            Flowee.GroupBox {
                id: outputSelector
                title: qsTr("Coins")
                x: parent.x + offset + parent.width - width
                y: {
                    if (width + amountLabel.x + amountLabel.width + 10 > root.width)
                        return amountLabel.y + amountLabel.height + 6
                    return 0;
                }

                collapsable: false
                drawBorder: true
                width: Math.max(label.width + 20, 110)
                height: implicitHeight - 10
                property int outputCount: modelData.outputCount
                onOutputCountChanged: modelData.outputCount = outputCount;

                Item {
                    implicitWidth: label.implicitWidth
                    implicitHeight: label.height - 10
                    Flowee.Label {
                        id: label
                        width: parent.width
                        text: modelData.inputCount + " ⇒ " + outputSelector.outputCount
                        y: -6 // digits only, so above the x-height its empty.
                    }
                }
            }
            Flowee.ArrowPoint {
                anchors.right: outputSelector.right
                anchors.rightMargin: 8
                y: outputSelector.y + outputSelector.height - label.height / 2 - height
                rotation: 90
            }
            MouseArea {
                anchors.fill: outputSelector
                anchors.margins: -5
                onClicked: popup.open(outputSelector)
            }

            Item {
                id: address
                width: parent.width
                x: modelData.sent ? 80 : 0
                y: {
                    // tall vs wide
                    if (outputSelector.width + 10 + fromLabel.implicitWidth > root.width)
                        return outputSelector.y + outputSelector.height + 6;
                    return topRow.height + 6;
                }
                height: fromLabel.height + 10
                opacity: 1 - Math.abs(dragItem.x) / 200

                Flowee.AddressLabel {
                    id: fromLabel
                    y: 5
                    showCopyIcon: false
                    width: Math.min(implicitWidth, parent.width - x)
                    txInfo: modelData.from
                    highlight: false
                }
            }

            Flowee.ProgressCheckIcon {
                broadcastStatus: modelData.broadcastStatus
                transformOrigin: Item.TopLeft
                visible: modelData.sent
                scale: 0.4
            }
        }
    }

    Flowee.Label {
        id: helpText

        property rect base: Qt.rect(0, 0, 1, 1);

        width: parent.width - 20
        anchors.horizontalCenter: parent.horizontalCenter
        y: {
            var baseCopy = base;
            if (baseCopy.width === 1)
                return 0;
            if (height + 10 < baseCopy.y) // place it above
                return baseCopy.y - height - 10

            return baseCopy.y + baseCopy.height + 20;
        }

        text: qsTr("Send Now")
        font.pixelSize: 100
        fontSizeMode: Text.HorizontalFit
        color: mainWindow.floweeGreen
        opacity: 0
        onOpacityChanged: if (opacity === 0) base = Qt.rect(0, 0, 1, 1); // reset
        Behavior on opacity { NumberAnimation { } }
    }

    Flowee.Label {
        id: infoLabel
        width: parent.width
        text: {
            if (root.transferManager.unsentTxCount < 2)
                return "";
            return qsTr("Create and send all %1 transactions", "",
                        root.transferManager.unsentTxCount).arg(root.transferManager.unsentTxCount);

        }
        // height: text === "" ? 0 : implicitHeight
        anchors.bottom: slideToApprove.top
        anchors.bottomMargin: 10
        wrapMode: Text.WordWrap
    }

    Mobile.SlideToApprove {
        id: slideToApprove
        visible: root.transferManager.unsentTxCount > 0
        onActivated: root.transferManager.sendAll();
        anchors.bottom: parent.bottom
        anchors.left: parent.left
        anchors.right: parent.right
        anchors.bottomMargin: 10
    }

    Flowee.BigCloseButton {
        x: 10
        visible: root.transferManager.unsentTxCount === 0
        anchors.bottom: parent.bottom
        anchors.bottomMargin: 10
        enabled: false
        onClicked: {
            var mainView = thePile.get(0);
            mainView.currentIndex = 0; // go to the 'main' tab.
            thePile.pop();
            thePile.pop();
        }
    }
    FocusScope {
        id: popup // its basically a full page overlay
        height: 400
        width: 200
        anchors.fill: parent
        visible: false

        property var targetItem: null
        function open(sourceItem) {
            targetItem = sourceItem;
            content.model = root.transferManager.outputModel;
            visible = true;
            popup.forceActiveFocus();
            reviewList.enabled = false;
        }

        onVisibleChanged: {
            if (!visible) {
                root.forceActiveFocus();
                reviewList.enabled = true;
                content.model = undefined;
            }
        }

        MouseArea {
            anchors.fill: parent;
            onClicked: popup.visible = false;
        }

        Rectangle {
            color: palette.light
            border.color: palette.midlight
            border.width: 1
            radius: 5
            anchors.bottom: parent.bottom
            anchors.bottomMargin: -2
            anchors.horizontalCenter: parent.horizontalCenter
            width: 160
            height: 360
            ListView {
                id: content
                anchors.fill: parent
                anchors.margins: 6
                clip: true
                header: Flowee.Label { text: qsTr("Target Coins", "indicates a number") + ":" }
                delegate: Rectangle {
                    width: ListView.view.width
                    height: Math.max(60, label2.height + 10);
                    color: (index % 2) === 0 ? palette.base : palette.alternateBase
                    Flowee.Label {
                        id: label2
                        text: model.number
                        anchors.centerIn: parent
                    }
                    MouseArea {
                        anchors.fill: parent
                        onClicked: {
                            popup.targetItem.outputCount = model.number
                            popup.visible = false;
                        }
                    }
                }
            }
        }
    }
}