import QtQuick 2.15
import QtQuick.Layouts 1.15

import StatusQ.Core 0.1
import StatusQ.Core.Theme 0.1
import StatusQ.Controls 0.1
import StatusQ.Core.Utils 0.1 as SQUtils
import StatusQ.Components 0.1
import StatusQ.Controls.Validators 0.1

import "../controls"

import utils 1.0

ColumnLayout {
    id: root

    readonly property alias input: topAmountToSendInput
    readonly property bool inputNumberValid: !!input.text && !isNaN(d.parsedInput) && input.valid

    readonly property int minSendCryptoDecimals:
        !inputIsFiat ? LocaleUtils.fractionalPartLength(d.inputNumber) : 0
    readonly property int minReceiveCryptoDecimals:
        !inputIsFiat ? minSendCryptoDecimals + 1 : 0
    readonly property int minSendFiatDecimals:
        inputIsFiat ? LocaleUtils.fractionalPartLength(d.inputNumber) : 0
    readonly property int minReceiveFiatDecimals:
        inputIsFiat ? minSendFiatDecimals + 1 : 0

    property var selectedHolding // Crypto asset symbol like ETH
    property string currentCurrency // Fiat currency symbol like USD

    property int multiplierIndex // How divisible the token is, 18 for ETH

    property double maxInputBalance

    property bool isBridgeTx: false
    property bool interactive: false
    property bool inputIsFiat: false

    property string caption: isBridgeTx ? qsTr("Amount to bridge") : qsTr("Amount to send")

    property bool fiatInputInteractive: true

    // Crypto value to send expressed in base units (like wei for ETH),
    // as a string representing integer decimal
    readonly property alias cryptoValueToSend: d.cryptoValueRawToSend

    readonly property alias cryptoValueToSendFloat: d.cryptoValueToSend

    property var formatCurrencyAmount:
        (amount, symbol, options = null, locale = null) => {}

    property bool loading

    signal reCalculateSuggestedRoute()

    QtObject {
        id: d

        property double cryptoValueToSend
        property double fiatValueToSend

        Binding on cryptoValueToSend {
            value: {
                root.selectedHolding
                if(!root.selectedHolding || !root.selectedHolding.marketDetails || !root.selectedHolding.marketDetails.currencyPrice) {
                    return 0
                }
                return root.inputIsFiat ? d.fiatValueToSend/root.selectedHolding.marketDetails.currencyPrice.amount
                                        : d.inputNumber
            }
            delayed: true
        }

        Binding on fiatValueToSend {
            value: {
                root.selectedHolding
                if(!root.selectedHolding || !root.selectedHolding.marketDetails || !root.selectedHolding.marketDetails.currencyPrice) {
                    return 0
                }
                return root.inputIsFiat ? d.inputNumber
                                        : d.cryptoValueToSend * root.selectedHolding.marketDetails.currencyPrice.amount
            }
            delayed: true
        }

        readonly property string selectedSymbol: !!root.selectedHolding && !!root.selectedHolding.symbol ? root.selectedHolding.symbol: ""

        readonly property string cryptoValueRawToSend: {
            if (!root.inputNumberValid)
                return "0"

            return SQUtils.AmountsArithmetic.fromNumber(
                        d.cryptoValueToSend, root.multiplierIndex).toString()
        }

        // Crypto value should be represented by 0 and fiat with 0.00
        readonly property string zeroString: {
            let decimals = root.inputIsFiat ? 2 : 0
            LocaleUtils.numberToLocaleString(0, decimals, topAmountToSendInput.locale)
        }

        readonly property double parsedInput:
            LocaleUtils.numberFromLocaleString(topAmountToSendInput.text,
                                               topAmountToSendInput.locale)

        readonly property double inputNumber:
            root.inputNumberValid ? d.parsedInput : 0

        readonly property Timer waitTimer: Timer {
            interval: 1000
            onTriggered: reCalculateSuggestedRoute()
        }
    }

    onMaxInputBalanceChanged: {
        input.validate()
    }

    StatusBaseText {
        text: root.caption
        font.pixelSize: 13
        lineHeight: 18
        lineHeightMode: Text.FixedHeight
        color: Theme.palette.directColor1
    }

    RowLayout {
        Layout.fillWidth: true
        id: topItem

        AmountInputWithCursor {
            id: topAmountToSendInput
            Layout.fillWidth: true
            Layout.maximumWidth: 250
            Layout.preferredWidth: !!text ? input.edit.paintedWidth + 2
                                          : textMetrics.advanceWidth
            placeholderText: d.zeroString
            input.edit.color: input.valid ? Theme.palette.directColor1
                                          : Theme.palette.dangerColor1
            input.edit.readOnly: !root.interactive
            validationMode: StatusInput.ValidationMode.Always
            validators: [
                StatusValidator {
                    errorMessage: ""

                    validate: (text) => {
                                  var num = 0
                                  try {
                                      num = Number.fromLocaleString(topAmountToSendInput.locale, text)
                                  } catch (e) {
                                      console.warn(e, "(Error parsing number from text: %1)".arg(text))
                                      return false
                                  }

                                  return num > 0 && num <= root.maxInputBalance
                              }
                }
            ]

            TextMetrics {
                id: textMetrics
                text: topAmountToSendInput.placeholderText
                font: topAmountToSendInput.placeholderFont
            }

            Keys.onReleased: {
                const amount = LocaleUtils.numberFromLocaleString(
                                 topAmountToSendInput.text,
                                 locale)
                if (!isNaN(amount))
                    d.waitTimer.restart()
            }

            visible: !root.loading
        }
        LoadingComponent {
            objectName: "topAmountToSendInputLoadingComponent"
            Layout.preferredWidth: topAmountToSendInput.width
            Layout.preferredHeight: topAmountToSendInput.height
            visible: root.loading
        }
    }

    StatusBaseText {
        Layout.maximumWidth: parent.width
        id: bottomItem
        objectName: "bottomItemText"

        readonly property double bottomAmountToSend: inputIsFiat ? d.cryptoValueToSend
                                                                 : d.fiatValueToSend
        readonly property string bottomAmountSymbol: inputIsFiat ? d.selectedSymbol
                                                                 : root.currentCurrency
        elide: Text.ElideMiddle
        text: root.formatCurrencyAmount(bottomAmountToSend, bottomAmountSymbol)
        font.pixelSize: 13
        color: Theme.palette.directColor5

        MouseArea {
            anchors.fill: parent
            cursorShape: enabled ? Qt.PointingHandCursor : undefined
            enabled: root.fiatInputInteractive && !!root.selectedHolding

            onClicked: {
                topAmountToSendInput.validate()
                if(!!topAmountToSendInput.text) {
                    topAmountToSendInput.text = root.formatCurrencyAmount(
                                bottomItem.bottomAmountToSend,
                                bottomItem.bottomAmountSymbol,
                                { noSymbol: true, rawAmount: true },
                                topAmountToSendInput.locale)
                }
                root.inputIsFiat = !root.inputIsFiat
                d.waitTimer.restart()
            }
        }
        visible: !root.loading
    }

    LoadingComponent {
        objectName: "bottomItemTextLoadingComponent"
        Layout.preferredWidth: bottomItem.width
        Layout.preferredHeight: bottomItem.height
        visible: root.loading
    }
}