/**
 * Parsley validation for the new-client modal. Does not strip or rewrite user input;
 * invalid values are reported via Parsley messages only.
 */
(function (getJq) {
    'use strict';

    function $(selector, context) {
        var jq = getJq();
        if (!jq) {
            return { length: 0 };
        }
        return arguments.length > 1 ? jq(selector, context) : jq(selector);
    }

    var FORM_SELECTOR = '#client_form';
    var NS = '.newClientModalValidate';
    var TEXT_ALLOWED = /^[A-Za-z0-9/_.\- ]*$/;
    var EMAIL_RE = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;

    function isParsleyReady() {
        return !!window.Parsley;
    }

    function isSkippable(el) {
        return !el || el.disabled || el.type === 'hidden';
    }

    function isPanOrGst(el) {
        var id = (el.id || '').toLowerCase();
        return id === 'pan' || id === 'gst';
    }

    function isMobile(el) {
        var id = (el.id || '').toLowerCase();
        var name = (el.name || '').toLowerCase();
        return id === 'mobile' || id === 'phone' || name === 'mobile' || name === 'phone';
    }

    function isEmail(el) {
        var type = (el.type || '').toLowerCase();
        var id = (el.id || '').toLowerCase();
        var name = (el.name || '').toLowerCase();
        return type === 'email' || id === 'email' || id === 'email2' || name === 'email' || name === 'email2';
    }

    function isCharsetCandidate(el) {
        if (!el || el.tagName === 'SELECT') {
            return false;
        }
        var type = (el.type || '').toLowerCase();
        if (type === 'file' || type === 'checkbox' || type === 'radio' || type === 'password' || type === 'submit' || type === 'button' || type === 'reset') {
            return false;
        }
        if (isPanOrGst(el) || isMobile(el) || isEmail(el)) {
            return false;
        }
        return true;
    }

    function registerValidators() {
        if (!isParsleyReady() || window.Parsley.__newClientModalValidatorsRegistered) {
            return;
        }

        window.Parsley.addValidator('newclientcharset', {
            validateString: function (value) {
                if (!value || String(value).trim() === '') {
                    return true;
                }
                return TEXT_ALLOWED.test(String(value));
            },
            messages: { en: 'Only letters, numbers, spaces, and the characters / _ - . are allowed.' }
        });

        window.Parsley.addValidator('newclientmobile10', {
            validateString: function (value, req, instance) {
                var v = String(value || '').replace(/\D/g, '');
                if (!instance.$element.prop('required') && v.length === 0) {
                    return true;
                }
                if (instance.$element.prop('required') && v.length === 0) {
                    return true;
                }
                return v.length === 10;
            },
            messages: { en: 'Mobile number must be exactly 10 digits (numbers only).' }
        });

        window.Parsley.addValidator('newclientemail', {
            validateString: function (value) {
                if (!value || String(value).trim() === '') {
                    return true;
                }
                return EMAIL_RE.test(String(value).trim());
            },
            messages: { en: 'Please enter a valid email address.' }
        });

        window.Parsley.__newClientModalValidatorsRegistered = true;
    }

    function clearAttrs($el) {
        ['data-parsley-newclientcharset', 'data-parsley-newclientmobile10', 'data-parsley-newclientemail'].forEach(function (a) {
            $el.removeAttr(a);
        });
    }

    function applyConstraints($form) {
        $form.find('input, textarea, select').each(function () {
            var el = this;
            var $el = $(el);
            if (isSkippable(el) || isPanOrGst(el)) {
                return;
            }

            clearAttrs($el);

            if (isMobile(el)) {
                $el.attr('data-parsley-newclientmobile10', 'true');
                if (!$el.attr('data-parsley-trigger')) {
                    $el.attr('data-parsley-trigger', 'input change');
                }
                return;
            }

            if (isEmail(el)) {
                $el.attr('data-parsley-newclientemail', 'true');
                if (!$el.attr('data-parsley-trigger')) {
                    $el.attr('data-parsley-trigger', 'input change');
                }
                return;
            }

            if (isCharsetCandidate(el)) {
                $el.attr('data-parsley-newclientcharset', 'true');
                if (!$el.attr('data-parsley-trigger')) {
                    $el.attr('data-parsley-trigger', 'input change');
                }
                return;
            }

            if (el.tagName === 'SELECT' && !$el.attr('data-parsley-trigger')) {
                $el.attr('data-parsley-trigger', 'change');
            }
        });
    }

    function refreshParsley($form) {
        try {
            var p = $form.parsley();
            if (p && typeof p.refresh === 'function') {
                p.refresh();
            }
        } catch (e) {
            // no-op
        }
    }

    function validateField(el) {
        if (!el || isSkippable(el) || !isParsleyReady()) {
            return;
        }
        var $f = $(el).closest('form');
        if (!$f.length) {
            return;
        }
        applyConstraints($f);
        refreshParsley($f);
        try {
            $(el).parsley().validate();
        } catch (e) {
            // no-op
        }
    }

    function init() {
        var $form = $(FORM_SELECTOR);
        if (!$form.length || !isParsleyReady()) {
            return;
        }
        registerValidators();
        applyConstraints($form);
        refreshParsley($form);

        $form.off(NS);
        $form.on('input' + NS, 'input:not([type=hidden]), textarea', function () {
            validateField(this);
        });
        $form.on('change' + NS, 'select, input:not([type=hidden]), textarea', function () {
            validateField(this);
        });
    }

    $(function () {
        init();
    });

    window.refreshNewClientModalValidation = function () {
        init();
    };
})(function () {
    return window.jQuery;
});