import { Json, IConfig, IHash, JsonObject } from "merapi";

export interface CommandOptions {
        noHelp?: boolean;
        isDefault?: boolean;
    }

export interface ParseOptionsResult {
    args: string[];
    unknown: string[];
}

export interface Option {
    flags: string;
    required: boolean;
    optional: boolean;
    bool: boolean;
    short?: string;
    long: string;
    description: string;
}

export interface Command extends NodeJS.EventEmitter {
    args: string[];

    /**
     * Set the program version to `str`.
     *
     * This method auto-registers the "-V, --version" flag
     * which will print the version number when passed.
     *
     * @param {string} str
     * @param {string} [flags]
     * @returns {Command} for chaining
     */
    version(str: string, flags?: string): Command;

    /**
     * Add command `name`.
     *
     * The `.action()` callback is invoked when the
     * command `name` is specified via __ARGV__,
     * and the remaining arguments are applied to the
     * function for access.
     *
     * When the `name` is "*" an un-matched command
     * will be passed as the first arg, followed by
     * the rest of __ARGV__ remaining.
     *
     * @example
     *      program
     *        .version('0.0.1')
     *        .option('-C, --chdir <path>', 'change the working directory')
     *        .option('-c, --config <path>', 'set config path. defaults to ./deploy.conf')
     *        .option('-T, --no-tests', 'ignore test hook')
     *
     *      program
     *        .command('setup')
     *        .description('run remote setup commands')
     *        .action(function() {
     *          console.log('setup');
     *        });
     *
     *      program
     *        .command('exec <cmd>')
     *        .description('run the given remote command')
     *        .action(function(cmd) {
     *          console.log('exec "%s"', cmd);
     *        });
     *
     *      program
     *        .command('teardown <dir> [otherDirs...]')
     *        .description('run teardown commands')
     *        .action(function(dir, otherDirs) {
     *          console.log('dir "%s"', dir);
     *          if (otherDirs) {
     *            otherDirs.forEach(function (oDir) {
     *              console.log('dir "%s"', oDir);
     *            });
     *          }
     *        });
     *
     *      program
     *        .command('*')
     *        .description('deploy the given env')
     *        .action(function(env) {
     *          console.log('deploying "%s"', env);
     *        });
     *
     *      program.parse(process.argv);
     *
     * @param {string} name
     * @param {string} [desc] for git-style sub-commands
     * @param {CommandOptions} [opts] command options
     * @returns {Command} the new command
     */
    command(name: string, desc?: string, opts?: CommandOptions): Command;


    /**
     * Define argument syntax for the top-level command.
     *
     * @param {string} desc
     * @returns {Command} for chaining
     */
    arguments(desc: string): Command;

    /**
     * Parse expected `args`.
     *
     * For example `["[type]"]` becomes `[{ required: false, name: 'type' }]`.
     *
     * @param {string[]} args
     * @returns {Command} for chaining
     */
    parseExpectedArgs(args: string[]): Command;
    /**
     * Register callback `fn` for the command.
     *
     * @example
     *      program
     *        .command('help')
     *        .description('display verbose help')
     *        .action(function() {
     *           // output help here
     *        });
     *
     * @param {(...args: any[]) => void} fn
     * @returns {Command} for chaining
    */
    action(fn: (...args: any[]) => void): Command;

    /**
     * Define option with `flags`, `description` and optional
     * coercion `fn`.
     *
     * The `flags` string should contain both the short and long flags,
     * separated by comma, a pipe or space. The following are all valid
     * all will output this way when `--help` is used.
     *
     *    "-p, --pepper"
     *    "-p|--pepper"
     *    "-p --pepper"
     *
     *@example
     *     // simple boolean defaulting to false
     *     program.option('-p, --pepper', 'add pepper');
     *
     *     --pepper
     *     program.pepper
     *     // => Boolean
     *
     *     // simple boolean defaulting to true
     *     program.option('-C, --no-cheese', 'remove cheese');
     *
     *     program.cheese
     *     // => true
     *
     *     --no-cheese
     *     program.cheese
     *     // => false
     *
     *     // required argument
     *     program.option('-C, --chdir <path>', 'change the working directory');
     *
     *     --chdir /tmp
     *     program.chdir
     *     // => "/tmp"
     *
     *     // optional argument
     *     program.option('-c, --cheese [type]', 'add cheese [marble]');
     *
     * @param {string} flags
     * @param {string} [description]
     * @param {((arg1: any, arg2: any) => void) | RegExp} [fn] function or default
     * @param {*} [defaultValue]
     * @returns {Command} for chaining
     */
    option(flags: string, description?: string, fn?: ((arg1: any, arg2: any) => void) | RegExp, defaultValue?: any): Command;
    option(flags: string, description?: string, defaultValue?: any): Command;

    /**
     * Allow unknown options on the command line.
     *
     * @param {boolean} [arg] if `true` or omitted, no error will be thrown for unknown options.
     * @returns {Command} for chaining
     */
    allowUnknownOption(arg?: boolean): Command;

    /**
     * Parse `argv`, settings options and invoking commands when defined.
     *
     * @param {string[]} argv
     * @returns {Command} for chaining
     */
    parse(argv: string[]): Command;

    /**
     * Parse options from `argv` returning `argv` void of these options.
     *
     * @param {string[]} argv
     * @returns {ParseOptionsResult}
     */
    parseOptions(argv: string[]): ParseOptionsResult;

    /**
     * Return an object containing options as key-value pairs
     *
     * @returns {{[key: string]: string}}
     */
    opts(): { [key: string]: string };

    /**
     * Set the description to `str`.
     *
     * @param {string} str
     * @return {(Command | string)}
     */
    description(str: string): Command;
    description(): string;

    /**
     * Set an alias for the command.
     *
     * @param {string} alias
     * @return {(Command | string)}
     */
    alias(alias: string): Command;
    alias(): string;

    /**
     * Set or get the command usage.
     *
     * @param {string} str
     * @return {(Command | string)}
     */
    usage(str: string): Command;
    usage(): string;

    /**
     * Get the name of the command.
     *
     * @return {string}
     */
    name(): string;

    /**
     * Output help information for this command.
     *
     * @param {() => void} [cb] Callback method
     */
    outputHelp(cb?: () => void): void;

    /** Output help information and exit. */
    help(): void;
}

export interface CommandList {
    [name: string] : CommandDescriptor;
}

export interface CommandDescriptor {
    type?: "group" | "command" | "alias";
    desc?: string;
    middleware?: string[];
    subcommands?: CommandList;
    args?: string;
    params?: {
        [param: string]: {
            type: string,
            desc?: string,
            short?: string,
            bool?: boolean,
            value?: Json
        }
    };
    handler?: string;
    alias?: string;
}

export interface ICompile {
    execDirectives(config: IConfig, basepath: string) : IConfig;
    execDirective(name: string, directive: any, dict: IHash<any>, basepath: string) : void
}

export interface IHelper {
    getFiles(dir: string, ending: string) : string[];
    loadYaml(file: string) : JsonObject;
    dumpYaml(file: string, object: JsonObject) : void;
    compareTestResult(result: Json, expect: Json) : {field: string, expect: any, result: any}[];
    setProp(prop: string, value: Json, options?: JsonObject) : void;
    getProp(prop: string, options?: JsonObject): Json;
    toPromise(ctx: any, func: any, ...args: any[]): Promise<any>;
    getBotId(): string;
    getProjectId(): string;
    createDirectory(path: string, mode?: number) : void;
    getCurrentToken() : JsonObject;
    loadYamlOrJsonFile(filePath: string) : JsonObject;
    inquirerPrompt(questions: JsonObject[]): Promise<JsonObject>;
    delete() : Boolean;
    deleteKeyToken(username: string): JsonObject;
    wrapError(error : any) : string;
    difference(object: any, base: any): Object;
    checkNotificationStatus() : Boolean;
    addCommandSession(command:string): void;
    getCommandSession(): JsonObject[];
    clearCommandSession(): void;
    sendGoogleAnalytics(event:string, action:string, data:string): void;
}

export interface ITester {
    execIntentTest(yaml: any, botApi: any, botId: string, print: (text: string) => void) : Promise<IHash<{field: string, expect: any, result: any}[]>>;
    execStateTest(yaml: any, botApi: any, botId: string, print: (text: string) => void) : Promise<IHash<{field: string, expect: any, result: any}[]>>;
    execActionsTest(yaml: any, botApi: any, botId: string, print: (text: string) => void) : Promise<IHash<{field: string, expect: any, result: any}[]>>;
    execFlowTest(yaml: any, botApi: any, botId: string, print: (text: string) => void) : Promise<IHash<{field: string, expect: any, result: any}[]>>;
}