import * as fs from 'fs-extra';
import * as matter from 'gray-matter';
import { Converter } from 'showdown';
import { red } from 'chalk';
import { Publisher } from './publisher';
import { PubConfig } from './schema';
import { getOutputLink } from './structure';

export const addHashes = (pub: Publisher, key: string, offset: number): string => {
    const file: string = pub.files.find((e: string) => e.indexOf(key) !== -1);
    const range: number = file.split('/').length + offset;
    for(let i = 0; i < range; i++) {
        pub.summary += `#`;
    }
    return file.replace(`${ pub.config.source }`, '.');
};

export const getMarkdownConverter = (): Converter => {
    return new Converter({
        ghCompatibleHeaderId: true,
        parseImgDimensions: true,
        strikethrough: true,
        tables: true,
        ghCodeBlocks: true,
        tasklists: true,
        requireSpaceBeforeHeadingText: true
    });
};

export const getTemplateData = (file: any | string, config: PubConfig): any => {
    const c: Converter = getMarkdownConverter();
    try {
        let gray: any;
        if(typeof(file) === 'string') {
            const md = fs.readFileSync(file, { encoding: 'utf-8' });
            gray = matter(md);
        }
        else {
            gray = file;
        }
        gray.data.content = c.makeHtml(gray.content);
        gray.data['link'] = getOutputLink(file, config);
        return gray.data;
    }
    catch(e: any) {
        console.info(red(`Unable to open file ${ config.prefix }/${ file }: ${ e }`));
    }
    return;
};