// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

// Depends on htmlhint.js from http://htmlhint.com/js/htmlhint.js

// declare global: HTMLHint

;(function (mod) {
    if (typeof exports == 'object' && typeof module == 'object')
        // CommonJS
        mod(require('../../lib/codemirror'), require('htmlhint'))
    else if (typeof define == 'function' && define.amd)
        // AMD
        define(['../../lib/codemirror', 'htmlhint'], mod)
    // Plain browser env
    else mod(CodeMirror, window.HTMLHint)
})(function (CodeMirror, HTMLHint) {
    'use strict'

    var defaultRules = {
        'tagname-lowercase': true,
        'attr-lowercase': true,
        'attr-value-double-quotes': true,
        'doctype-first': false,
        'tag-pair': true,
        'spec-char-escape': true,
        'id-unique': true,
        'src-not-empty': true,
        'attr-no-duplication': true,
    }

    CodeMirror.registerHelper('lint', 'html', function (text, options) {
        var found = []
        if (HTMLHint && !HTMLHint.verify) {
            if (typeof HTMLHint.default !== 'undefined') {
                HTMLHint = HTMLHint.default
            } else {
                HTMLHint = HTMLHint.HTMLHint
            }
        }
        if (!HTMLHint) HTMLHint = window.HTMLHint
        if (!HTMLHint) {
            if (window.console) {
                window.console.error('Error: HTMLHint not found, not defined on window, or not available through define/require, CodeMirror HTML linting cannot run.')
            }
            return found
        }
        var messages = HTMLHint.verify(text, (options && options.rules) || defaultRules)
        for (var i = 0; i < messages.length; i++) {
            var message = messages[i]
            var startLine = message.line - 1,
                endLine = message.line - 1,
                startCol = message.col - 1,
                endCol = message.col
            found.push({
                from: CodeMirror.Pos(startLine, startCol),
                to: CodeMirror.Pos(endLine, endCol),
                message: message.message,
                severity: message.type,
            })
        }
        return found
    })
})