/**
 * @author Martin Karkowski
 * @email m.karkowski@zema.de
 * @create date 2020-11-11 13:27:58
 * @modify date 2020-11-12 13:49:17
 * @desc [description]
 */

import { ArgumentParser } from "argparse";
import { readFile } from "fs/promises";
import { writeDefaultConfig } from "../loader/loadPackages";
import { getNopeLogger } from "../logger/getLogger";

// Define the Main Function.
// This function is used as cli tool.
const main = async function () {

    const parser = new ArgumentParser({
        version: "1.0.0",
        addHelp: true,
        description: "Command Line interface, determines the available Packages."
    });

    let opts: {
        modules: string,
    };

    try{
        // Try to read in the default config file.
        opts = JSON.parse(await readFile("./nopeconfig.json", {
            encoding: "utf-8"
        }));
        
    } catch (error) {
        opts = {} as any;
    }

    parser.addArgument(
        ["-f", "--file"],
        {
            help: "File containing containing the package definitions.",
            defaultValue: "./config/settings.json",
            type: "string",
            dest: "file"
        }
    );
    parser.addArgument(
        ["-s", "--search"],
        {
            help: "Directory containing the Modules.",
            defaultValue: "not-provided",
            type: "string",
            dest: "modules"
        }
    );
    
    const args = parser.parseArgs();

    if (args.modules != "not-provided"){
        opts.modules = args.modules;
    }

    // Define a Logger
    const logger = getNopeLogger("Setup-CLI");

    try {
        logger.info("Scanning " + opts.modules);
        // Write the Config.
        await writeDefaultConfig(opts.modules, args.file);
        // Inform the user.
        logger.info("Created Package-File at " + args.file);
    } catch (error) {
        logger.error("Failed generating the Config");
        logger.error(error);
    }   
};

main().catch(e => console.error(e));