import QtQuick 2.12
import QtQuick.Controls 2.14
import QtGraphicalEffects 1.13
import QtQuick.Dialogs 1.3

import StatusQ.Controls 0.1
import StatusQ.Popups 0.1
import StatusQ.Core 0.1
import StatusQ.Core.Theme 0.1
import utils 1.0
import shared.stores 1.0
import "../controls"
import "../stores"

OnboardingBasePage {
    id: root

    state: "existingUser"

    property bool existingUser: (root.state === "existingUser")
    property var mnemonicInput: []
    property string mnemonicString

    signal seedValidated()

    Connections {
        target: OnboardingStore.onboardingModuleInst
        onAccountImportError: {
            if (error === Constants.existingAccountError) {
                importSeedError.title = qsTr("Keys for this account already exist")
                importSeedError.text = qsTr("Keys for this account already exist and can't be added again. If you've lost your password, passcode or Keycard, uninstall the app, reinstall and access your keys by entering your seed phrase")
            } else {
                importSeedError.title = qsTr("Error importing seed")
                importSeedError.text = error
            }
            importSeedError.open()
        }
        onAccountImportSuccess: {
            root.seedValidated()
        }
    }
    MessageDialog {
        id: importSeedError
        icon: StandardIcon.Critical
        standardButtons: StandardButton.Ok
    }

    Item {
        implicitWidth: 731
        implicitHeight: 472
        anchors.centerIn: parent

        StatusBaseText {
            id: headlineText
            font.pixelSize: 22
            font.weight: Font.Bold
            color: Theme.palette.directColor1
            anchors.horizontalCenter: parent.horizontalCenter
            text: qsTr("Enter seed phrase")
        }

        StatusSwitchTabBar {
            id: switchTabBar
            anchors.top: headlineText.bottom
            anchors.horizontalCenter: parent.horizontalCenter
            anchors.topMargin: 24
            StatusSwitchTabButton {
                text: qsTr("12 words")
            }
            StatusSwitchTabButton {
                text: qsTr("18 words")
            }
            StatusSwitchTabButton {
                text: qsTr("24 words")
            }
            onCurrentIndexChanged: {
                root.mnemonicString = "";
                root.mnemonicInput = [];
                submitButton.enabled = false;
            }
        }
        clip: true

        GridView {
            id: grid
            width: parent.width
            property var wordIndex: ["1", "5", "9", "2", "6", "10", "3", "7", "11", "4", "8", "12",
                "13", "17", "21", "14", "18", "22", "15", "19", "23", "16", "20", "24"]
            property var wordIndex18: ["1", "5", "9", "2", "6", "10", "3", "7", "11", "4", "8", "12",
                "13", "", "14", "17", "15", "18", "16", ""]
            height: (grid.count === 20 && !grid.atXBeginning) ? 144 : 244
            anchors.left: parent.left
            anchors.leftMargin: 12
            anchors.top: switchTabBar.bottom
            anchors.topMargin: ((grid.count === 20) && !grid.atXBeginning) ? 74 : 24
            flow: GridView.FlowTopToBottom
            cellWidth: (parent.width/4)
            cellHeight: 72
            interactive: false
            z: 100000
            model: switchTabBar.currentItem.text.substring(0,2) === "12" ? 12 :
                   switchTabBar.currentItem.text.substring(0,2) === "18" ? 20 : 24

            function addWord(pos, word, ignoreGoingNext) {
                root.mnemonicInput.push({pos: pos, seed: word.replace(/\s/g, '')});
                for (var j = 0; j < mnemonicInput.length; j++) {
                    if (mnemonicInput[j].pos === pos && mnemonicInput[j].seed !== word) {
                        mnemonicInput[j].seed = word;
                        break;
                    }
                }
                //remove duplicates
                var valueArr = mnemonicInput.map(function(item){ return item.pos });
                var isDuplicate = valueArr.some(function(item, idx){
                    if (valueArr.indexOf(item) !== idx) {
                        root.mnemonicInput.splice(idx, 1);
                    }
                    return valueArr.indexOf(item) !== idx
                });
                if (!ignoreGoingNext) {
                    for (var i = !grid.atXBeginning ? 12 : 0; i < grid.count; i++) {
                        if (parseInt(grid.itemAtIndex(i).leftComponentText) !== (parseInt(pos)+1)) {
                            continue
                        }

                        grid.currentIndex = grid.itemAtIndex(i).itemIndex;
                        grid.itemAtIndex(i).textEdit.input.edit.forceActiveFocus();

                        if (grid.currentIndex !== 12) {
                            continue
                        }

                        grid.positionViewAtEnd();
                        
                        if (grid.count === 20) {
                            grid.contentX = 1500;
                        }
                    }
                }
                submitButton.checkMnemonicLength()
            }

            delegate: StatusSeedPhraseInput {
                id: seedWordInput
                width: (grid.cellWidth - 24)
                height: (grid.cellHeight - 28)
                textEdit.input.anchors.leftMargin: 16
                textEdit.input.anchors.rightMargin: 16
                textEdit.text: {
                    for (var i in root.mnemonicInput) {
                        let p = root.mnemonicInput[i]
                        if (p.pos === seedWordInput.leftComponentText) {
                            return p.seed
                        }
                    }
                    return ""
                }

                visible: grid.count !== 20 || (index !== 13 && index !== 19)
                leftComponentText: (grid.count === 20) ? grid.wordIndex18[index] : grid.wordIndex[index]
                inputList: BIP39_en { }
                property int itemIndex: index
                z: (grid.currentIndex === index) ? 150000000 : 0
                onTextChanged: {
                    invalidSeedTxt.visible = false;
                }
                onDoneInsertingWord: {
                    grid.addWord(leftComponentText, word)
                }
                onEditClicked: {
                    grid.currentIndex = index;
                    grid.itemAtIndex(index).textEdit.input.edit.forceActiveFocus();
                }
                onKeyPressed: {
                    if (event.key === Qt.Key_Backtab) {
                        for (var i = !grid.atXBeginning ? 12 : 0; i < grid.count; i++) {
                            if (parseInt(grid.itemAtIndex(i).leftComponentText) === ((parseInt(leftComponentText)-1) >= 0 ? (parseInt(leftComponentText)-1) : 0)) {
                                grid.itemAtIndex(i).textEdit.input.edit.forceActiveFocus(Qt.TabFocusReason);
                                textEdit.input.tabNavItem = grid.itemAtIndex(i).textEdit.input.edit;
                                event.accepted = true
                                break
                            }
                        }
                    } else if (event.key === Qt.Key_Tab) {
                        for (var i = !grid.atXBeginning ? 12 : 0; i < grid.count; i++) {
                            if (parseInt(grid.itemAtIndex(i).leftComponentText) === ((parseInt(leftComponentText)+1) <= grid.count ? (parseInt(leftComponentText)+1) : grid.count)) {
                                grid.itemAtIndex(i).textEdit.input.edit.forceActiveFocus(Qt.TabFocusReason);
                                textEdit.input.tabNavItem = grid.itemAtIndex(i).textEdit.input.edit;
                                event.accepted = true
                                break
                            }
                        }
                    }

                    if (event.matches(StandardKey.Paste)) {
                        const clipboardText = globalUtils.getFromClipboard()
                        event.accepted = true
                        let words = clipboardText.split(' ')
                        root.mnemonicInput = []
                        for (let i = 0; i < words.length; i++) {
                            grid.itemAtIndex(i).setWord(words[i])
                            grid.addWord(i, words[i], true)
                        }
                        submitButton.checkMnemonicLength()
                        return
                    }

                    if (event.key === Qt.Key_Return || event.key === Qt.Key_Enter) {
                        event.accepted = true
                        if (submitButton.enabled) {
                            submitButton.clicked(null)
                            return
                        }
                    }

                    if (event.key === Qt.Key_Delete || event.key === Qt.Key_Backspace) {
                        var wordIndex = mnemonicInput.findIndex(x => x.pos === leftComponentText);
                        if (wordIndex > -1) {
                            mnemonicInput.splice(wordIndex , 1);
                            submitButton.checkMnemonicLength()
                        }
                    }

                    grid.currentIndex = index;
                }
                Component.onCompleted: { grid.itemAtIndex(0).textEdit.input.edit.forceActiveFocus(); }
            }
        }

        StatusBaseText {
            id: invalidSeedTxt
            anchors.horizontalCenter: parent.horizontalCenter
            anchors.top: grid.bottom
            anchors.topMargin: (grid.count === 20 && !grid.atXBeginning) ? 74 : 24
            color: Theme.palette.dangerColor1
            visible: false
            text: qsTr("Invalid seed")
        }

        StatusButton {
            id: submitButton
            anchors.horizontalCenter: parent.horizontalCenter
            anchors.top: invalidSeedTxt.bottom
            anchors.topMargin: 24
            enabled: false
            property int gridCount: (grid.count === 20) ? 18 : grid.count

            function checkMnemonicLength() {
                submitButton.enabled = (root.mnemonicInput.length === (grid.atXBeginning ? 12 : submitButton.gridCount));
            }

            text: root.existingUser ? qsTr("Restore Status Profile") :
                  ((grid.count > 12) && grid.atXBeginning) ? qsTr("Next") : qsTr("Import")
            onClicked: {
                if ((grid.count > 12) && grid.atXBeginning) {
                    grid.positionViewAtEnd();
                    if (grid.count === 20) {
                        grid.contentX = 1500;
                    }
                } else {
                    root.mnemonicString = "";
                    var sortTable = mnemonicInput.sort(function (a, b) {
                        return a.pos - b.pos;
                    });
                    for (var i = 0; i < mnemonicInput.length; i++) {
                        root.mnemonicString += sortTable[i].seed + ((i === (gridCount-1)) ? "" : " ");
                    }
                    if (Utils.isMnemonic(root.mnemonicString) && !OnboardingStore.validateMnemonic(root.mnemonicString)) {
                        OnboardingStore.importMnemonic(root.mnemonicString)
                        root.mnemonicString = "";
                        root.mnemonicInput = [];
                    } else {
                        invalidSeedTxt.visible = true;
                        enabled = false;
                    }
                }
            }
        }
    }

    onBackClicked: {
        root.mnemonicString = "";
        if (!grid.atXBeginning) {
            grid.positionViewAtBeginning();
        } else {
            root.mnemonicInput = [];
            root.exit();
        }
    }
}