import minimist = require('minimist');
import * as path from "path";
import * as utils from "../common/utils";
import * as workingDir from "./disk/workingDir";
import * as fsu from "./utils/fsu";
import * as chalk from "chalk";

export const defaultPort = process.env.PORT /* the port by Windows azure */
    || 4444;

const defaultHost = '0.0.0.0';

const minimistOpts: minimist.Opts = {
    string: ['dir', 'config', 'host', 'httpskey', 'httpscert', 'auth'],
    boolean: ['open', 'safe', 'init', 'build', 'debug'],
    alias: {
        't': ['port'],
        'd': ['dir'],
        'o': ['open'],
        'p': ['project'],
        'i': ['init'],
        'b': ['build'],
        'h': ['host'],
        'a': ['auth']
    },
    default: {
        t: defaultPort,
        d: process.cwd(),
        o: true,
        h: defaultHost
    }
};

var argv: {
    t?: number;
    d?: string;
    o?: boolean;
    p?: string;
    safe?: boolean;
    i?: boolean;
    b?: boolean;
    h?: string;
    httpskey?: string;
    httpscert?: string;
    auth?: string;
    debug?: boolean;
    _?: string[];
} = minimist(process.argv.slice(2), minimistOpts);

interface CommandLineOptions {
    port: number;
    dir: string;
    project: string;
    open: boolean;
    safe: boolean;
    init: boolean;
    build: boolean;
    filePaths: string[];
    host: string;

    httpskey?: string;
    httpscert?: string;

    auth?: string;
    debug?: boolean;
}
export let getOptions = utils.once((): CommandLineOptions => {
    protectAgainstLongStringsWithSingleDash();

    let options: CommandLineOptions = {
        port: argv.t,
        dir: argv.d,
        open: argv.o,
        safe: argv.safe,
        project: argv.p,
        init: argv.i,
        build: argv.b,
        filePaths: [],
        host: argv.h,
        httpskey: argv.httpskey,
        httpscert: argv.httpscert,
        auth: argv.auth,
        debug: argv.debug,
    }
    if (typeof options.port !== 'number') {
        options.port = defaultPort;
    }
    if (argv.d) {
        options.dir = workingDir.makeAbsoluteIfNeeded(argv.d);
        workingDir.setProjectRoot(options.dir);
    }
    if (argv._ && argv._.length) {
        options.filePaths = argv._.map(x => workingDir.makeAbsoluteIfNeeded(x));
    }
    // Common usage user does `alm ./srcFolder`
    // So if there was only one filePath detected and its a dir ... user probably meant `-d`
    if (options.filePaths.length == 1) {
        let filePath = workingDir.makeAbsoluteIfNeeded(options.filePaths[0]);
        if (fsu.isDir(filePath)) {
            workingDir.setProjectRoot(filePath);
            options.filePaths = [];
        }
    }

    if (options.safe) {
        console.log('---SAFE MODE---');
    }

    if (options.init && options.project) {
        console.log(chalk.red('The project option is ignored if you specific --init'));
    }

    if (options.project) {
        options.project = workingDir.makeAbsoluteIfNeeded(options.project);
        if (fsu.isDir(options.project) && fsu.existsSync(options.project + '/tsconfig.json')) {
            options.project = options.project + '/' + 'tsconfig.json';
        }
        console.log('TSCONFIG: ', options.project);
    }

    if (options.httpskey) {
        options.httpskey = workingDir.makeAbsoluteIfNeeded(options.httpskey);
    }
    if (options.httpscert) {
        options.httpscert = workingDir.makeAbsoluteIfNeeded(options.httpscert);
    }

    return options;
});


/**
 * E.g. the user does `-user` instead of `--user`
 */
function protectAgainstLongStringsWithSingleDash() {
    const singleDashMatchers: string[] =
        (minimistOpts.string as string[]).concat(minimistOpts.boolean as string[])
            .map(x => '-' + x);
    const args = process.argv.slice(2);
    const didUserTypeWithJustOneDash = args.filter(arg => singleDashMatchers.some(ss => ss == arg));
    if (didUserTypeWithJustOneDash.length) {
        console.log(chalk.red('You provided the following arguments with a single dash (-foo). You probably meant to provide double dashes (--foo)'), didUserTypeWithJustOneDash);
        process.exit(1);
    }
}