const Handlebars = require('handlebars');
const fs = require('../../core/fs');
const utils = require('../../utils/utils');


class ScaffoldingReact {
    constructor(embark, options){
        this.embark = embark;
        this.options = options;
    }

    _generateFile(contract, templateFilename, extension, data){
        const filename = contract.className.toLowerCase() + '.' + extension;
        const filePath = './app/' + filename;
        if (fs.existsSync(filePath)){
          //  throw new Error("file '" + filePath + "' already exists");
        }

        const templatePath = fs.embarkPath('lib/modules/scaffolding-react/templates/' + templateFilename);
        const source = fs.readFileSync(templatePath).toString();
        const template = Handlebars.compile(source);

        // Write template
        const result = template(data);
        fs.writeFileSync(filePath, result);
    }

    _buildHTML(contract){
        const filename = contract.className.toLowerCase();
        this._generateFile(contract, 'index.html.tpl', 'html',
        {
            'title': contract.className, 
            'filename': filename
        });
    }

    build(contract){
        this._buildHTML(contract);

        const filename = contract.className.toLowerCase();

        this._generateFile(contract, 'dapp.js.tpl', 'js',         
        {
            'title': contract.className + ' autogenerated UI',
            'contractName': contract.className
        });

        // Update config
        const contents = fs.readFileSync("./embark.json");
        let embarkJson = JSON.parse(contents);
        embarkJson.app["js/" + filename + ".js"] = "app/" + filename + '.js';
        embarkJson.app[filename + ".html"] = "app/" + filename + '.html';
        fs.writeFileSync("./embark.json", JSON.stringify(embarkJson, null, 4));



    }
}

module.exports = ScaffoldingReact;