/* global CodeMirror, moment */
/** Set up a shortcut function to be called via router actions.
 *  See editor-route-base
 */

function init() {
    //Used for simple, noncomputational replace-and-go! shortcuts.
    //  See default case in shortcut function below.
    CodeMirror.prototype.simpleShortcutSyntax = {
        bold: '**$1**',
        italic: '*$1*',
        strike: '~~$1~~',
        code: '`$1`',
        link: '[$1](http://)',
        image: '![$1](http://)',
        blockquote: '> $1'
    };
    CodeMirror.prototype.shortcut = function (type) {
        var text = this.getSelection(),
            cursor = this.getCursor(),
            line = this.getLine(cursor.line),
            fromLineStart = {line: cursor.line, ch: 0},
            md, letterCount, textIndex, position;
        switch (type) {
        case 'h1':
            this.replaceRange('# ' + line, fromLineStart);
            this.setCursor(cursor.line, cursor.ch + 2);
            return;
        case 'h2':
            this.replaceRange('## ' + line, fromLineStart);
            this.setCursor(cursor.line, cursor.ch + 3);
            return;
        case 'h3':
            this.replaceRange('### ' + line, fromLineStart);
            this.setCursor(cursor.line, cursor.ch + 4);
            return;
        case 'h4':
            this.replaceRange('#### ' + line, fromLineStart);
            this.setCursor(cursor.line, cursor.ch + 5);
            return;
        case 'h5':
            this.replaceRange('##### ' + line, fromLineStart);
            this.setCursor(cursor.line, cursor.ch + 6);
            return;
        case 'h6':
            this.replaceRange('###### ' + line, fromLineStart);
            this.setCursor(cursor.line, cursor.ch + 7);
            return;
        case 'link':
            md = this.simpleShortcutSyntax.link.replace('$1', text);
            this.replaceSelection(md, 'end');
            if (!text) {
                this.setCursor(cursor.line, cursor.ch + 1);
            } else {
                textIndex = line.indexOf(text, cursor.ch - text.length);
                position = textIndex + md.length - 1;
                this.setSelection({
                    line: cursor.line,
                    ch: position - 7
                }, {
                    line: cursor.line,
                    ch: position
                });
            }
            return;
        case 'image':
            md = this.simpleShortcutSyntax.image.replace('$1', text);
            if (line !== '') {
                md = '\n\n' + md;
            }
            this.replaceSelection(md, 'end');
            cursor = this.getCursor();
            this.setSelection({line: cursor.line, ch: cursor.ch - 8}, {line: cursor.line, ch: cursor.ch - 1});
            return;
        case 'list':
            md = text.replace(/^(\s*)(\w\W*)/gm, '$1* $2');
            this.replaceSelection(md, 'end');
            return;
        case 'currentDate':
            md = moment(new Date()).format('D MMMM YYYY');
            this.replaceSelection(md, 'end');
            return;
        /** @TODO
        case 'uppercase':
            md = text.toLocaleUpperCase();
            break;
        case 'lowercase':
            md = text.toLocaleLowerCase();
            break;
        case 'titlecase':
            md = text.toTitleCase();
            break;
        case 'selectword':
            word = this.getTokenAt(cursor);
            if (!/\w$/g.test(word.string)) {
                this.setSelection({line: cursor.line, ch: word.start}, {line: cursor.line, ch: word.end - 1});
            } else {
                this.setSelection({line: cursor.line, ch: word.start}, {line: cursor.line, ch: word.end});
            }
            break;
        case 'copyHTML':
            converter = new Showdown.converter();
            if (text) {
                md = converter.makeHtml(text);
            } else {
                md = converter.makeHtml(this.getValue());
            }

            $(".modal-copyToHTML-content").text(md).selectText();
            break;
        case 'newLine':
            if (line !== "") {
                this.replaceRange(line + "\n\n", fromLineStart);
            }
            break;
        */
        default:
            if (this.simpleShortcutSyntax[type]) {
                md = this.simpleShortcutSyntax[type].replace('$1', text);
            }
        }
        if (md) {
            this.replaceSelection(md, 'end');
            if (!text) {
                letterCount = md.length;
                this.setCursor({
                    line: cursor.line,
                    ch: cursor.ch + (letterCount / 2)
                });
            }
        }
    };
}

export default {
    init: init
};