const fs = require('fs');
const path = require('path');
const Module = require('../base/Module');
const RepositorySystem = require('./RepositorySystem');

class ModuleSystem {
	constructor() {
		this.modules = [];
		this.instances = [];
		this.loadedModules = [];
	}

	run() {
		this.instances = this.modules.map((mod) => new mod());
		this.loadedModules = [...this.loadedModules, ...this.modules];
		this.modules = [];
	}

	loadModule(mod) {
		mod.__loadedDirectory = "imported/" + mod.name;
		this.modules.push(mod);
		console.log("File ", mod.__loadedDirectory + '  loaded successfully');
	}

	loadModules(filepath = 'modules', prefix="") {
		// search files
		let p = path.resolve(filepath);
		let current = [];
		console.log("Filepath:", p);
		let files = fs.readdirSync(p);
		for(var ind in files) {
			let filename = files[ind];
			try {
				let temp = require(path.resolve(filepath, filename));
				if(temp.prototype instanceof Module) {
					temp.__loadedDirectory = filepath + '/' + filename;
					current.push(temp);
				}
			} catch(e) {
				let err = "Cannot read file -> " + filepath + '/' + filename;
				console.log(err);
				throw e;
			}
		}

		console.log('Modules Loaded:');
		for(var i in current) {
			console.log("File ", current[i].__loadedDirectory + '  loaded successfully');
		}
		
		this.modules = [
			...this.modules,
			...current
		];
	}
}

module.exports = new ModuleSystem();