/*
 * Copyright (c) 2014, Stefan Brand <seiichiro@seiichiro0185.org>
 * 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. The names of the contributors may not 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 2.0
import Sailfish.Silica 1.0
import "../lib/storage.js" as DB // Import the storage library for Config-Access

// Define Layout of the Add OTP Dialog
Dialog {
  id: addOTP

  allowedOrientations: Orientation.All

	// We get the Object of the parent page on call to refresh it after adding a new Entry
  property QtObject parentPage: null

  // If we want to edit a Key we get title and key from the calling page
  property string paramType: "TOTP"
  property string paramLabel: ""
  property string paramKey: ""
  property int paramLen: 6
  property int paramDiff: 0
  property int paramCounter: 1 // New Counters start at 1
  property bool paramNew: false

  function checkQR() {
    if (paramLabel != "" && paramKey != "" && !paramNew) {
      return(true);
    } else {
      return(false);
    }
  }

  SilicaFlickable {
    id: addOtpList
    anchors.fill: parent
    contentHeight: dialog.height

    PullDownMenu {
      visible: checkQR()
      MenuItem {
        text: qsTr("Show QR-Code")
        onClicked: {
          if (((paramType == "TOTP" || paramType == "TOTP_STEAM") && (otpLabel.text == "" || otpSecret.text == "")) || (paramType == "HOTP" && (otpLabel.text == "" || otpSecret.text == "" || otpCounter.text <= 0))) {
            notify.show(qsTr("Can't create QR-Code from incomplete settings!"), 4000);
          } else {
            var otpurl = "";
            if (paramType == "TOTP") {
              if (otpLabel.text != "" && otpSecret.text != "")
                otpurl = "otpauth://totp/"+otpLabel.text+"?secret="+otpSecret.text+"&digits="+otpLen.text;
            } else if (paramType == "HOTP") {
              if (paramLabel != "" && paramKey != "" && paramCounter > 0)
                otpurl = "otpauth://hotp/"+otpLabel.text+"?secret="+otpSecret.text+"&counter="+otpCounter.text+"&digits="+otpLen.text;
            }
            if (otpurl != "") {
              pageStack.push(Qt.resolvedUrl("QRPage.qml"), {paramQrsource: otpurl, paramLabel: otpLabel.text, paramQRId = -1});
            } else {
              notify.show(qsTr("Can't create QR-Code from incomplete settings!"), 4000);
            }
          }
        }
      }
    }

    VerticalScrollDecorator {}

    Column {
      id: dialog
      width: parent.width
      DialogHeader {
        acceptText: paramNew ? qsTr("Add") : qsTr("Save")
      }

      ComboBox {
        id: typeSel
        label: qsTr("Type")
        menu: ContextMenu {
          MenuItem { text: qsTr("Time-based (TOTP)"); onClicked: { paramType = "TOTP" } }
          MenuItem { text: qsTr("Counter-based (HOTP)"); onClicked: { paramType = "HOTP" } }
          MenuItem { text: qsTr("Steam Guard"); onClicked: { paramType = "TOTP_STEAM" } }
        }
      }
      TextField {
        id: otpLabel
        width: parent.width
        label: qsTr("Title")
        placeholderText: qsTr("Title for the OTP")
        text: paramLabel != "" ? paramLabel : ""
        focus: true
        horizontalAlignment: TextInput.AlignLeft

        EnterKey.enabled: text.length > 0
        EnterKey.iconSource: "image://theme/icon-m-enter-next"
        EnterKey.onClicked: otpSecret.focus = true
      }
      TextField {
        id: otpSecret
        width: parent.width
        label: qsTr("Secret (at least 16 characters)")
        text: paramKey != "" ? paramKey : ""
        placeholderText: qsTr("Secret OTP Key")
        focus: true
        validator: RegExpValidator { regExp: /^(?:[A-Za-z2-7]{8})*(?:[A-Za-z2-7]{2}={6}|[A-Za-z2-7]{4}={4}|[A-Za-z2-7]{5}={3}|[A-Za-z2-7]{7}=)?$/ }
        inputMethodHints: Qt.ImhNoPredictiveText
        horizontalAlignment: TextInput.AlignLeft

        EnterKey.enabled: text.length > 15
        EnterKey.iconSource: "image://theme/icon-m-enter-next"
        EnterKey.onClicked: otpLen.focus = true
      }
      TextField {
        id: otpLen
        width: parent.width
        visible: paramType != "TOTP_STEAM" ? true : false
        label: qsTr("Length")
        text: paramLen
        placeholderText: qsTr("Length of the Token")
        focus: true
        horizontalAlignment: TextInput.AlignLeft
        validator: IntValidator { bottom: 1 }

        EnterKey.iconSource: "image://theme/icon-m-enter-next"
        EnterKey.onClicked: paramType == "HOTP" ? otpCounter.focus = true : otpDiff.focus = true
      }
      TextField {
        id: otpDiff
        width: parent.width
        visible: paramType == "TOTP" ? true : false
        label: qsTr("Time Derivation (Seconds)")
        text: paramDiff
        placeholderText: qsTr("Time Derivation (Seconds)")
        focus: true
        horizontalAlignment: TextInput.AlignLeft
        validator: IntValidator {}

        EnterKey.iconSource: "image://theme/icon-m-enter-accept"
        EnterKey.onClicked: addOTP.accept()
      }
      TextField {
        id: otpCounter
        width: parent.width
        visible: paramType == "HOTP" ? true : false
        label: qsTr("Next Counter Value")
        text: paramCounter
        placeholderText: qsTr("Next Value of the Counter")
        focus: true
        horizontalAlignment: TextInput.AlignLeft
        validator: IntValidator { bottom: 0 }

        EnterKey.iconSource: "image://theme/icon-m-enter-accept"
        EnterKey.onClicked: addOTP.accept()
      }
      Component.onCompleted: { typeSel.currentIndex = paramType == "HOTP" ? 1 : 0 }
    }
  }

  // Check if we can Save
  canAccept: otpLabel.text.length > 0 && otpSecret.text.length >= 16 && otpSecret.acceptableInput && otpLen.text >= 1 && ((paramType == "TOTP" && otpDiff.text != "") || paramType == "TOTP_STEAM" || otpCounter.text.length > 0) ? true : false

  // Save if page is Left with Add
  onDone: {
    if (result == DialogResult.Accepted) {
      // Save the entry to the Config DB
      if (paramLabel != "" && paramKey != "" && !paramNew) {
        // Parameters where filled -> Change existing entry
        DB.changeOTP(otpLabel.text, otpSecret.text, paramType, otpCounter.text, otpLen.text, otpDiff.text, paramLabel, paramKey)
      } else {
        // There were no parameters -> Add new entry
        DB.addOTP(otpLabel.text, otpSecret.text, paramType, otpCounter.text, appWin.listModel.count, otpLen.text, otpDiff.text);
      }

      // Refresh the main Page
      parentPage.refreshOTPList();
    }
  }
}