import cla from "command-line-args";
import { CommandRegistry } from "./CommandRegistry";
import chalk from "chalk";
import { CommandHandlerOptions, CommandHandlerOptionsAsserted } from "../types";
import SetDefaultObjectProperties from "../util/SetDefaultObjectProperties";

export const CommandHandler = (
  opts: CommandHandlerOptions = {},
  options: cla.OptionDefinition[] = []
) => {
  const optsAsserted =
    SetDefaultObjectProperties<CommandHandlerOptionsAsserted>(opts, {
      ignoreNoCommandFound: true,
    });

  const result = cla(
    [{ name: "command", defaultValue: true, defaultOption: true }, ...options],
    { stopAtFirstUnknown: true }
  );

  if (result.command) {
    const command = CommandRegistry.Get(result.command);
    if (command) {
      command.exec(result._unknown || [], result);
    } else if (!optsAsserted.ignoreNoCommandFound) {
      if (result.command == true) {
        console.log(chalk.red("Unspecified command"));
      } else
        console.log(chalk.red("Invalid command " + chalk.bold(result.command)));
    }
  }
};