const path = require('path');
const fs = require('fs');
const chalk = require('chalk');

const { Util } = require('../util/');

class LocaleLoader {

    constructor(client) {

        this.client = client;
        this.languages = {};
        
    }

    template(locale, index) {

        // console.log(String.raw`${this.languages[locale][index]}`);
        return (this.languages[locale] ? this.languages[locale][index] : `Locale \`${locale}\` does not exist.`) || `Entry \`${locale}:${index}\` does not exist.`;

    }

    async loadLanguages() {

        const _directory = path.join(process.cwd(), 'language/languages');
        const directories = fs.readdirSync(_directory); //locale directories, ex. en_us, fi
        
        for (const directory of directories) this.loadLanguage(directory);

    }

    loadLanguage(language) {

        this.client.logger.info(`Loading locale ${chalk.bold(language)}`);
        const directory = path.join(process.cwd(), `language/languages/${language}`);
        const files = Util.readdirRecursive(directory);

        const combined = {};
        for(let file of files) {
            file = fs.readFileSync(file, {
                encoding: 'utf8'
            });
            const result = this.loadFile(file);
            Object.assign(combined, result);
        }

        this.languages[language] = combined;

    }

    loadFile(file) {

        const lines = file.split('\n');
        const parsed = {};

        let matched = null;
        let text = '';
        for(const line of lines) {
            if(line.startsWith('//')) continue;
            const matches = line.match(/\[([_A-Z0-9]{1,})\]/giu);
            if(matches) {
                if (matched) {
                    parsed[matched] = text;
                    [, matched] = matches;
                    text = '';
                } else {
                    [, matched] = matches;
                }
            } else if(matched) {
                text += line;
            } else {
                continue;
            }
        }
        parsed[matched] = text;

        for(const [ key, value ] of Object.entries(parsed)) {
            parsed[key] = value.replace(/^(\r)|(\r){1,}$/gu, '').replace(/\r/gu, '\n');
        }

        return parsed;

    }

}

module.exports = LocaleLoader;