// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

/**
 * @fileoverview 'settings-credit-card-edit-dialog' is the dialog that allows
 * editing or creating a credit card entry.
 */

(function() {
'use strict';

Polymer({
  is: 'settings-credit-card-edit-dialog',

  properties: {
    /**
     * The credit card being edited.
     * @type {!chrome.autofillPrivate.CreditCardEntry}
     */
    creditCard: Object,

    /**
     * The actual title that's used for this dialog. Will be context sensitive
     * based on if |creditCard| is being created or edited.
     * @private
     */
    title_: String,

    /**
     * The list of months to show in the dropdown.
     * @private {!Array<string>}
     */
    monthList_: {
      type: Array,
      value: [
        '01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12'
      ],
    },

    /**
     * The list of years to show in the dropdown.
     * @private {!Array<string>}
     */
    yearList_: Array,

    /** @private */
    expirationYear_: String,

    /** @private {string|undefined} */
    expirationMonth_: String,
  },

  behaviors: [
    I18nBehavior,
  ],

  /**
   * @return {boolean} True iff the provided expiration date is passed.
   * @private
   */
  checkIfCardExpired_: function(expirationMonth_, expirationYear_) {
    const now = new Date();
    return (
        expirationYear_ < now.getFullYear() ||
        (expirationYear_ == now.getFullYear() &&
         expirationMonth_ <= now.getMonth()));
  },

  /** @override */
  attached: function() {
    this.title_ = this.i18n(
        this.creditCard.guid ? 'editCreditCardTitle' : 'addCreditCardTitle');

    // Needed to initialize the disabled state of the Save button.
    this.onCreditCardNameOrNumberChanged_();

    // Add a leading '0' if a month is 1 char.
    if (this.creditCard.expirationMonth.length == 1) {
      this.creditCard.expirationMonth = '0' + this.creditCard.expirationMonth;
    }

    const date = new Date();
    let firstYear = date.getFullYear();
    let lastYear = firstYear + 19;  // Show next 19 years (20 total).
    let selectedYear = parseInt(this.creditCard.expirationYear, 10);

    // |selectedYear| must be valid and between first and last years.
    if (!selectedYear) {
      selectedYear = firstYear;
    } else if (selectedYear < firstYear) {
      firstYear = selectedYear;
    } else if (selectedYear > lastYear) {
      lastYear = selectedYear;
    }

    const yearList = [];
    for (let i = firstYear; i <= lastYear; ++i) {
      yearList.push(i.toString());
    }
    this.yearList_ = yearList;

    this.async(() => {
      this.expirationYear_ = selectedYear.toString();
      this.expirationMonth_ = this.creditCard.expirationMonth;
      this.$.dialog.showModal();
    });
  },

  /** Closes the dialog. */
  close: function() {
    this.$.dialog.close();
  },

  /**
   * Handler for tapping the 'cancel' button. Should just dismiss the dialog.
   * @private
   */
  onCancelButtonTap_: function() {
    this.$.dialog.cancel();
  },

  /**
   * Handler for tapping the save button.
   * @private
   */
  onSaveButtonTap_: function() {
    if (!this.saveEnabled_()) {
      return;
    }

    // If the card is expired, reflect the error to the user.
    // Otherwise, update the card, save and close the dialog.
    if (!this.checkIfCardExpired_(
            this.expirationMonth_, this.expirationYear_)) {
      this.creditCard.expirationYear = this.expirationYear_;
      this.creditCard.expirationMonth = this.expirationMonth_;
      this.fire('save-credit-card', this.creditCard);
      this.close();
    }
  },

  /** @private */
  onMonthChange_: function() {
    this.expirationMonth_ = this.monthList_[this.$.month.selectedIndex];
  },

  /** @private */
  onYearChange_: function() {
    this.expirationYear_ = this.yearList_[this.$.year.selectedIndex];
  },

  /** @private */
  onCreditCardNameOrNumberChanged_: function() {
    this.$.saveButton.disabled = !this.saveEnabled_();
  },

  /** @private */
  saveEnabled_: function() {
    return (this.creditCard.name && this.creditCard.name.trim()) ||
        (this.creditCard.cardNumber && this.creditCard.cardNumber.trim());
  },
});
})();