/******************************************************************************
 * Copyright 2021 TypeFox GmbH
 * This program and the accompanying materials are made available under the
 * terms of the MIT License, which is available in the project root.
 ******************************************************************************/

import { Command, Option } from 'commander';
import type { ExtractTypesOptions, GenerateOptions} from './generate.js';
import { generate, generateTypes } from './generate.js';
import { cliVersion } from './generator/node-util.js';

const program = new Command();

program
    .version(cliVersion)
    .command('generate')
    .description('Generate code for a Langium grammar')
    .option('-f, --file <file>', 'The configuration file or package.json setting up the generator')
    .option('-w, --watch', 'Enable watch mode to regenerate when a grammar file is changed', false)
    .addOption(new Option('-m, --mode <mode>', 'Mode for optimized builds for your current environment').choices(['development', 'production']))
    .action((options: GenerateOptions) => {
        generate(options)
            .then(success => {
                if(!success) {
                    process.exit(2);
                }
                else {
                    process.exit(0);
                }
            }).catch(err => {
                console.error(err);
                process.exit(1);
            });
    });

program.command('extract-types')
    .argument('<file>', 'The langium grammar file to generate types for')
    .option('-o, --output <file>', "Output file name; default is 'types.langium' next to the grammar file")
    .option('-f, --force', 'Force overwriting any existing file')
    .action((file, options: ExtractTypesOptions) => {
        options.grammar = file;
        generateTypes(options).catch(err => {
            console.error(err);
            process.exit(1);
        });
    });

program.parse(process.argv);