/* <copyright>
Copyright (c) 2012, Motorola Mobility LLC.
All Rights Reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.

* 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.

* Neither the name of Motorola Mobility LLC nor the names of its
  contributors may 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.
</copyright> */
/**
    @module montage/ui/editable-text
    @requires montage/core/core
    @requires montage/ui/component
*/
var Montage = require("montage").Montage,
    Component = require("ui/component").Component;
/**
 * Common base class for textfield/textarea and other components that have editable components
    @class module:montage/ui/editable-text.EditableText
    @extends module:montage/ui/component.Component
 */
var EditableText = exports.EditableText = Montage.create(Component, /** @lends module:montage/ui/editable-text.EditableText# */ {

    hasTemplate: {
        value: true
    },
/**
  Description TODO
  @private
*/
    _hasFocus: {
        enumerable: false,
        value: false
    },
/**
  Description TODO
  @private
*/
    _value: {
        enumerable: false,
        value: null
    },
/**
  Description TODO
  @private
*/
    _valueSyncedWithInputField: {
        enumerable: false,
        value: false
    },
/**
        Description TODO
        @type {Function}
        @default null
    */
    value: {
        enumerable: true,
        serializable: true,
        get: function() {
            return this._value;
        },
        set: function(value, fromInput) {
            this._value = value;
            if(fromInput) {
                this._valueSyncedWithInputField = true;
            } else {
                this._valueSyncedWithInputField = false;
                this.needsDraw = true;
            }
        }
    },

    // set value from user input
    /**
      @private
    */
    _setValue: {
        value: function() {
            var newValue = this.element.value;
            if (newValue && newValue.length > 0 && this.converter) {
                var convertedValue;
                try {
                    convertedValue = this.converter.revert(newValue);
                    if (this.error) {
                        this.error = null;
                    }
                    // kishore: this is required bcos we need to pass the 2nd parameter to the setter
                    Object.getPropertyDescriptor(this, "value").set.call(this, convertedValue, true);

                } catch(e) {
                    // unable to convert - maybe error
                    this.error = e;
                    //this._valueSyncedWithInputField = false;
                }
            } else {
                Object.getPropertyDescriptor(this, "value").set.call(this, newValue, true);
            }
        }
    },
/**
        Description TODO
        @type {Property}
        @default null
    */
    converter:{
        value: null
    },
/**
  Description TODO
  @private
*/
    _error: {
        value: false
    },
 /**
        Description TODO
        @type {Function}
        @default {Boolean} false
    */
    error: {
        get: function() {
            return this._error;
        },
        set: function(v) {
            this._error = v;
            this.needsDraw = true;
        }
    },
/**
  Description TODO
  @private
*/
    _readOnly: {
        enumerable: true,
        value: false
    },
/**
        Description TODO
        @type {Function}
        @default {Boolean} false
    */
    readOnly: {
        get: function() {
            return this._readOnly;
        },
        set: function(value) {
            this._readOnly = value;
            this.needsDraw = true;
        }
    },
/**
  Description TODO
  @private
*/
    _updateOnInput: {
        value: true
    },

    // switch to turn off auto update upon keypress overriding the Converter flag
/**
        Description TODO
        @type {Function}
        @default {Boolean} true
    */
    updateOnInput: {
        get: function() {
            return !!this._updateOnInput;
        },
        set: function(v) {
            this._updateOnInput = v;
        },
        serializable: true
    },


    // If true, the field value will be validated 1 ms after the user changes the value
    /*
     // future properties - to allow partial validation (as the user types in the value)
     _validatePartial: {
     value: false
     },
     validatePartial: {
     get: function() {
     return !!this._validatePartial;
     },
     set: function(v) {
     this._validatePartial = v;
     }
     },

     // If true, the field will block invalid characters upon change
     _blockInvalid: {
     value: false
     },

     blockInvalid: {
     get: function() {
     return !!this._blockInvalid;
     },
     set: function(v) {
     this._blockInvalid = v;
     }
     },
     */



    // Callbacks
    /**
    Description TODO
    @function
    */
    prepareForDraw: {
        enumerable: false,
        value: function() {
            var el = this.element;
            el.value = this._inputValue;
            el.addEventListener("focus", this);
            el.addEventListener('input', this);
            el.addEventListener('change', this);
            el.addEventListener('blur', this);
        }
    },
/**
  Description TODO
  @private
*/
    _setElementValue: {
        value: function(v) {
            this.element.value = v;
        }
    },
/**
    Description TODO
    @function
    */
    draw: {
        enumerable: false,
        value: function() {
            var t = this.element;

            if (!this._valueSyncedWithInputField) {
                this._setElementValue(this.converter ? this.converter.convert(this._value) : this._value);
            }

            if (this._readOnly) {
                t.setAttribute('readonly', 'readonly');
            } else {
                t.removeAttribute('readonly');
            }

            if (this.error) {
                t.classList.add('montage-text-invalid');
                t.title = this.error.message || '';
            } else {
                t.classList.remove("montage-text-invalid");
                t.title = '';
            }

            this._drawSpecific();
        }
    },
/**
    Description TODO
    @function
    */
    didDraw: {
        enumerable: false,
        value: function() {
            if (this._hasFocus && this._value != null) {
                var length = this._value.toString().length;
                this.element.setSelectionRange(length, length);
            }
            this._valueSyncedWithInputField = true;
        }
    },
    // Event handlers
/**
    Description TODO
    @function
    */
    handleInput: {
        enumerable: false,
        value: function() {
            if (this.converter) {
                if (this.converter.allowPartialConversion === true && this.updateOnInput === true) {
                    this._setValue();
                }
            } else {
                this._setValue();
            }
        }
    },
/**
    Description TODO
    @function
    @param {Event Handler} event TODO
    */
    handleChange: {
        enumerable: false,
        value: function(event) {
            this._setValue();
            this._hasFocus = false;
        }
    },
/**
    Description TODO
    @function
    @param {Event Handler} event TODO
    */
    handleBlur: {
        enumerable: false,
        value: function(event) {
            this._hasFocus = false;
        }
    },
/**
    Description TODO
    @function
    @param {Event Handler} event TODO
    */
    handleFocus: {
        enumerable: false,
        value: function(event) {
            this._hasFocus = true;
        }
    }

});