/**
 * BootstrapValidator (https://github.com/nghuuphuoc/bootstrapvalidator)
 *
 * A jQuery plugin to validate form fields. Use with Bootstrap 3
 *
 * @author      http://twitter.com/nghuuphuoc
 * @copyright   (c) 2013 - 2014 Nguyen Huu Phuoc
 * @license     MIT
 */

(function($) {
    var BootstrapValidator = function(form, options) {
        this.$form   = $(form);
        this.options = $.extend({}, BootstrapValidator.DEFAULT_OPTIONS, options);

        this.dfds    = {};      // Array of deferred
        this.results = {};      // Validating results

        this.invalidField  = null;  // First invalid field
        this.$submitButton = null;  // The submit button which is clicked to submit form

        this._init();

        this.STATUS_NOT_VALIDATED = 'NOT_VALIDATED';
        this.STATUS_VALIDATING    = 'VALIDATING';
        this.STATUS_INVALID       = 'INVALID';
        this.STATUS_VALID         = 'VALID';
    };

    // The default options
    BootstrapValidator.DEFAULT_OPTIONS = {
        // The form CSS class
        elementClass: 'bootstrap-validator-form',

        // Default invalid message
        message: 'This value is not valid',

        // Shows ok/error/loading icons based on the field validity.
        // This feature requires Bootstrap v3.1.0 or later (http://getbootstrap.com/css/#forms-control-validation).
        // Since Bootstrap doesn't provide any methods to know its version, this option cannot be on/off automatically.
        // In other word, to use this feature you have to upgrade your Bootstrap to v3.1.0 or later.
        //
        // Examples:
        // - Use Glyphicons icons:
        //  feedbackIcons: {
        //      valid: 'glyphicon glyphicon-ok',
        //      invalid: 'glyphicon glyphicon-remove',
        //      validating: 'glyphicon glyphicon-refresh'
        //  }
        // - Use FontAwesome icons:
        //  feedbackIcons: {
        //      valid: 'fa fa-check',
        //      invalid: 'fa fa-times',
        //      validating: 'fa fa-refresh'
        //  }
        feedbackIcons: {
            valid:      null,
            invalid:    null,
            validating: null
        },

        // The submit buttons selector
        // These buttons will be disabled to prevent the valid form from multiple submissions
        submitButtons: 'button[type="submit"]',

        // The custom submit handler
        // It will prevent the form from the default submission
        //
        //  submitHandler: function(validator, form) {
        //      - validator is the BootstrapValidator instance
        //      - form is the jQuery object present the current form
        //  }
        submitHandler: null,

        // Live validating option
        // Can be one of 3 values:
        // - enabled: The plugin validates fields as soon as they are changed
        // - disabled: Disable the live validating. The error messages are only shown after the form is submitted
        // - submitted: The live validating is enabled after the form is submitted
        live: 'enabled',

        // Map the field name with validator rules
        fields: null
    };

    BootstrapValidator.prototype = {
        constructor: BootstrapValidator,

        /**
         * Init form
         */
        _init: function() {
            var that    = this,
                options = {
                    trigger:        this.$form.attr('data-bv-trigger'),
                    message:        this.$form.attr('data-bv-message'),
                    submitButtons:  this.$form.attr('data-bv-submitbuttons'),
                    live:           this.$form.attr('data-bv-live'),
                    fields:         {},
                    feedbackIcons: {
                        valid:      this.$form.attr('data-bv-feedbackicons-valid'),
                        invalid:    this.$form.attr('data-bv-feedbackicons-invalid'),
                        validating: this.$form.attr('data-bv-feedbackicons-validating')
                    }
                },
                validator,
                i = 0,
                v,          // Validator name
                enabled,
                optionName,
                optionValue,
                html5Attrs;

            this.$form
                // Disable client side validation in HTML 5
                .attr('novalidate', 'novalidate')
                .addClass(this.options.elementClass)
                // Disable the default submission first
                .on('submit.bootstrapValidator', function(e) {
                    e.preventDefault();
                    that.validate();
                })
                .on('click', this.options.submitButtons, function() {
                    that.$submitButton = $(this);
                })
                // Find all fields which have either "name" or "data-bv-field" attribute
                .find('[name], [data-bv-field]').each(function() {
                    var $field = $(this),
                        field  = $field.attr('name') || $field.attr('data-bv-field');
                    $field.attr('data-bv-field', field);

                    options.fields[field] = $.extend({}, {
                        trigger:    $field.attr('data-bv-trigger'),
                        message:    $field.attr('data-bv-message'),
                        container:  $field.attr('data-bv-container'),
                        selector:   $field.attr('data-bv-selector'),
                        validators: {}
                    }, options.fields[field]);

                    for (v in $.fn.bootstrapValidator.validators) {
                        validator  = $.fn.bootstrapValidator.validators[v];
                        enabled    = $field.attr('data-bv-' + v.toLowerCase()) + '';
                        html5Attrs = {};

                        if (('function' == typeof validator.enableByHtml5
                                && (html5Attrs = validator.enableByHtml5($(this)))
                                && (enabled != 'false'))
                            || ('undefined' == typeof validator.enableByHtml5 && ('' == enabled || 'true' == enabled)))
                        {
                            // Try to parse the options via attributes
                            validator.html5Attributes = validator.html5Attributes || ['message'];

                            options.fields[field]['validators'][v] = $.extend({}, html5Attrs == true ? {} : html5Attrs, options.fields[field]['validators'][v]);

                            for (i in validator.html5Attributes) {
                                optionName  = validator.html5Attributes[i];
                                optionValue = $field.attr('data-bv-' + v.toLowerCase() + '-' + optionName.toLowerCase());
                                if (optionValue) {
                                    if ('true' == optionValue) {
                                        optionValue = true;
                                    } else if ('false' == optionValue) {
                                        optionValue = false;
                                    }
                                    options.fields[field]['validators'][v][optionName] = optionValue;
                                }
                            }
                        }
                    }
                });

            this.options = $.extend(true, this.options, options);
            //console.log(this.options);

            for (var field in this.options.fields) {
                this._initField(field);
            }

            this._setLiveValidating();
        },

        /**
         * Init field
         *
         * @param {String} field The field name
         */
        _initField: function(field) {
            if (this.options.fields[field] == null || this.options.fields[field].validators == null) {
                return;
            }

            this.dfds[field]    = {};
            this.results[field] = {};

            var fields = this.getFieldElements(field);

            // We don't need to validate non-existing fields
            if (fields == null) {
                delete this.options.fields[field];
                delete this.dfds[field];
                return;
            }

            fields.attr('data-bv-field', field);

            // Create help block elements for showing the error messages
            var $field   = $(fields[0]),
                $parent  = $field.parents('.form-group'),
                // Allow user to indicate where the error messages are shown
                $message = this.options.fields[field].container ? $parent.find(this.options.fields[field].container) : this._getMessageContainer($field);

            $field.data('bootstrapValidator.messageContainer', $message);
            for (var validatorName in this.options.fields[field].validators) {
                if (!$.fn.bootstrapValidator.validators[validatorName]) {
                    delete this.options.fields[field].validators[validatorName];
                    continue;
                }

                this.results[field][validatorName] = this.STATUS_NOT_VALIDATED;
                $('<small/>')
                    .css('display', 'none')
                    .attr('data-bv-validator', validatorName)
                    .html(this.options.fields[field].validators[validatorName].message || this.options.fields[field].message || this.options.message)
                    .addClass('help-block')
                    .appendTo($message);
            }

            // Prepare the feedback icons
            // Available from Bootstrap 3.1 (http://getbootstrap.com/css/#forms-control-validation)
            if (this.options.feedbackIcons
                && this.options.feedbackIcons.validating && this.options.feedbackIcons.invalid && this.options.feedbackIcons.valid)
            {
                $parent.addClass('has-feedback');
                var $icon = $('<i/>').css('display', 'none').addClass('form-control-feedback').attr('data-bv-field', field).insertAfter($(fields[fields.length - 1]));
                // The feedback icon does not render correctly if there is no label
                // https://github.com/twbs/bootstrap/issues/12873
                if ($parent.find('label').length == 0) {
                    $icon.css('top', 0);
                }
            }

            if (this.options.fields[field]['enabled'] == null) {
                this.options.fields[field]['enabled'] = true;
            }

            // Whenever the user change the field value, mark it as not validated yet
            var that  = this,
                type  = fields.attr('type'),
                event = ('radio' == type || 'checkbox' == type || 'file' == type || 'SELECT' == fields[0].tagName) ? 'change' : 'keyup';
            fields.on(event + '.bootstrapValidator', function() {
                that.updateStatus($field, that.STATUS_NOT_VALIDATED, null);
            });
        },

        /**
         * Get the element to place the error messages
         *
         * @param {jQuery} $field The field element
         * @returns {jQuery}
         */
        _getMessageContainer: function($field) {
            var $parent = $field.parent();
            if ($parent.hasClass('form-group')) {
                return $parent;
            }

            var cssClasses = $parent.attr('class');
            if (!cssClasses) {
                return this._getMessageContainer($parent);
            }

            cssClasses = cssClasses.split(' ');
            var n = cssClasses.length;
            for (var i = 0; i < n; i++) {
                if (/^col-(xs|sm|md|lg)-\d+$/.test(cssClasses[i]) || /^col-(xs|sm|md|lg)-offset-\d+$/.test(cssClasses[i])) {
                    return $parent;
                }
            }

            return this._getMessageContainer($parent);
        },

        /**
         * Enable live validating
         */
        _setLiveValidating: function() {
            if ('enabled' == this.options.live) {
                var that = this;
                for (var field in this.options.fields) {
                    (function(f) {
                        var fields = that.getFieldElements(f);
                        if (fields) {
                            var type    = fields.attr('type'),
                                trigger = that.options.fields[field].trigger
                                        || that.options.trigger
                                        || (('radio' == type || 'checkbox' == type || 'file' == type || 'SELECT' == fields[0].tagName) ? 'change' : 'keyup'),
                                events  = trigger.split(' ').map(function(item) {
                                    return item + '.bootstrapValidator';
                                }).join(' ');

                            fields.on(events, function() {
                                that.validateField(f);
                            });
                        }
                    })(field);
                }
            }
        },

        /**
         * Disable/Enable submit buttons
         *
         * @param {Boolean} disabled
         */
        _disableSubmitButtons: function(disabled) {
            if (!disabled) {
                this.$form.find(this.options.submitButtons).removeAttr('disabled');
            } else if (this.options.live != 'disabled') {
                // Don't disable if the live validating mode is disabled
                this.$form.find(this.options.submitButtons).attr('disabled', 'disabled');
            }
        },

        /**
         * Called when all validations are completed
         */
        _submit: function() {
            if (!this.isValid()) {
                if ('submitted' == this.options.live) {
                    this.options.live = 'enabled';
                    this._setLiveValidating();
                }

                // Focus to the first invalid field
                if (this.invalidField) {
                    this.getFieldElements(this.invalidField).focus();
                }
                return;
            }

            this._disableSubmitButtons(true);

            // Call the custom submission if enabled
            if (this.options.submitHandler && 'function' == typeof this.options.submitHandler) {
                // Turn off the submit handler, so user can call form.submit() inside their submitHandler method
                this.$form.off('submit.bootstrapValidator');
                this.options.submitHandler.call(this, this, this.$form, this.$submitButton);
            } else {
                // Submit form
                this.$form.off('submit.bootstrapValidator').submit();
            }
        },

        // --- Public methods ---

        /**
         * Retrieve the field elements by given name
         *
         * @param {String} field The field name
         * @returns {null|jQuery[]}
         */
        getFieldElements: function(field) {
            var fields = this.$form.find(this.options.fields[field].selector || '[name="' + field + '"]');
            return (fields.length == 0) ? null : fields;
        },

        /**
         * Validate the form
         *
         * @return {BootstrapValidator}
         */
        validate: function() {
            if (!this.options.fields) {
                return this;
            }
            this._disableSubmitButtons(true);

            for (var field in this.options.fields) {
                this.validateField(field);
            }

            this._submit();
            return this;
        },

        /**
         * Validate given field
         *
         * @param {String} field The field name
         */
        validateField: function(field) {
            if (!this.options.fields[field]['enabled']) {
                return;
            }

            var that       = this,
                fields     = this.getFieldElements(field),
                $field     = $(fields[0]),
                validators = this.options.fields[field].validators,
                validatorName,
                validateResult;

            // We don't need to validate disabled field
            if (fields.length == 1 && fields.is(':disabled')) {
                delete this.options.fields[field];
                delete this.dfds[field];
                return;
            }

            for (validatorName in validators) {
                if (this.dfds[field][validatorName]) {
                    this.dfds[field][validatorName].reject();
                }

                // Don't validate field if it is already done
                if (this.results[field][validatorName] == this.STATUS_VALID || this.results[field][validatorName] == this.STATUS_INVALID) {
                    continue;
                }

                this.results[field][validatorName] = this.STATUS_VALIDATING;
                validateResult = $.fn.bootstrapValidator.validators[validatorName].validate(this, $field, validators[validatorName]);

                if ('object' == typeof validateResult) {
                    this.updateStatus($field, this.STATUS_VALIDATING, validatorName);
                    this.dfds[field][validatorName] = validateResult;

                    validateResult.done(function(isValid, v) {
                        // v is validator name
                        delete that.dfds[field][v];
                        that.updateStatus($field, isValid ? that.STATUS_VALID : that.STATUS_INVALID, v);

                        if (isValid && 'disabled' == that.options.live) {
                            that._submit();
                        }
                    });
                } else if ('boolean' == typeof validateResult) {
                    this.updateStatus($field, validateResult ? this.STATUS_VALID : this.STATUS_INVALID, validatorName);
                }
            }
        },

        /**
         * Check the form validity
         *
         * @returns {Boolean}
         */
        isValid: function() {
            var field, validatorName;
            for (field in this.results) {
                if (this.options.fields[field] == null || !this.options.fields[field]['enabled']) {
                    continue;
                }

                for (validatorName in this.results[field]) {
                    if (this.results[field][validatorName] == this.STATUS_NOT_VALIDATED || this.results[field][validatorName] == this.STATUS_VALIDATING) {
                        return false;
                    }

                    if (this.results[field][validatorName] == this.STATUS_INVALID) {
                        this.invalidField = field;
                        return false;
                    }
                }
            }

            return true;
        },

        /**
         * Update field status
         *
         * @param {String|jQuery} field The field name or field element
         * @param {String} status The status
         * Can be 'NOT_VALIDATED', 'VALIDATING', 'INVALID' or 'VALID'
         * @param {String|null} validatorName The validator name. If null, the method updates validity result for all validators
         * @return {BootstrapValidator}
         */
        updateStatus: function(field, status, validatorName) {
            var $field   = ('string' == typeof field) ? this.getFieldElements(field) : field,
                that     = this,
                field    = $field.attr('data-bv-field'),
                $parent  = $field.parents('.form-group'),
                $message = $field.data('bootstrapValidator.messageContainer'),
                $errors  = $message.find('.help-block[data-bv-validator]'),
                $icon    = $parent.find('.form-control-feedback[data-bv-field="' + field + '"]');

            // Update status
            if (validatorName) {
                this.results[field][validatorName] = status;
            } else {
                for (var v in this.options.fields[field].validators) {
                    this.results[field][v] = status;
                }
            }

            // Show/hide error elements and feedback icons
            switch (status) {
                case this.STATUS_VALIDATING:
                    this._disableSubmitButtons(true);
                    $parent.removeClass('has-success').removeClass('has-error');
                    // TODO: Show validating message
                    validatorName ? $errors.filter('.help-block[data-bv-validator="' + validatorName + '"]').hide() : $errors.hide();
                    if ($icon) {
                        $icon.removeClass(this.options.feedbackIcons.valid).removeClass(this.options.feedbackIcons.invalid).addClass(this.options.feedbackIcons.validating).show();
                    }
                    break;

                case this.STATUS_INVALID:
                    this._disableSubmitButtons(true);
                    $parent.removeClass('has-success').addClass('has-error');
                    validatorName ? $errors.filter('[data-bv-validator="' + validatorName + '"]').show() : $errors.show();
                    if ($icon) {
                        $icon.removeClass(this.options.feedbackIcons.valid).removeClass(this.options.feedbackIcons.validating).addClass(this.options.feedbackIcons.invalid).show();
                    }
                    break;

                case this.STATUS_VALID:
                    validatorName ? $errors.filter('[data-bv-validator="' + validatorName + '"]').hide() : $errors.hide();

                    // If the field is valid
                    if ($errors.filter(function() {
                            var display = $(this).css('display'), v = $(this).attr('data-bv-validator');
                            return ('block' == display) || (that.results[field][v] != that.STATUS_VALID);
                        }).length == 0
                    ) {
                        this._disableSubmitButtons(false);
                        $parent.removeClass('has-error').addClass('has-success');
                        if ($icon) {
                            $icon.removeClass(this.options.feedbackIcons.invalid).removeClass(this.options.feedbackIcons.validating).addClass(this.options.feedbackIcons.valid).show();
                        }
                    }
                    break;

                case this.STATUS_NOT_VALIDATED:
                default:
                    this._disableSubmitButtons(false);
                    $parent.removeClass('has-success').removeClass('has-error');
                    validatorName ? $errors.filter('.help-block[data-bv-validator="' + validatorName + '"]').hide() : $errors.hide();
                    if ($icon) {
                        $icon.removeClass(this.options.feedbackIcons.valid).removeClass(this.options.feedbackIcons.invalid).removeClass(this.options.feedbackIcons.validating).hide();
                    }
                    break;
            }

            return this;
        },

        // Useful APIs which aren't used internally

        /**
         * Reset the form
         *
         * @param {Boolean} resetFormData Reset current form data
         * @return {BootstrapValidator}
         */
        resetForm: function(resetFormData) {
            var field, $field, type;
            for (field in this.options.fields) {
                this.dfds[field]    = {};
                this.results[field] = {};

                $field = this.getFieldElements(field);
                // Mark field as not validated yet
                this.updateStatus($field, this.STATUS_NOT_VALIDATED, null);

                if (resetFormData) {
                    type = $field.attr('type');
                    ('radio' == type || 'checkbox' == type) ? $field.removeAttr('checked').removeAttr('selected') : $field.val('');
                }
            }

            this.invalidField  = null;
            this.$submitButton = null;

            // Enable submit buttons
            this._disableSubmitButtons(false);

            return this;
        },

        /**
         * Enable/Disable all validators to given field
         *
         * @param {String} field The field name
         * @param {Boolean} enabled Enable/Disable field validators
         * @return {BootstrapValidator}
         */
        enableFieldValidators: function(field, enabled) {
            this.options.fields[field]['enabled'] = enabled;
            this.updateStatus(field, this.STATUS_NOT_VALIDATED, null);

            return this;
        }
    };

    // Plugin definition
    $.fn.bootstrapValidator = function(options) {
        return this.each(function() {
            var $this = $(this), data = $this.data('bootstrapValidator');
            if (!data) {
                $this.data('bootstrapValidator', (data = new BootstrapValidator(this, options)));
            }
            if ('string' == typeof options) {
                data[options]();
            }
        });
    };

    // Available validators
    $.fn.bootstrapValidator.validators = {};

    $.fn.bootstrapValidator.Constructor = BootstrapValidator;
}(window.jQuery));