import {HelloWorldCommand} from "./HelloWorldCommand";
import {Command, CommandUnion} from "./Command";
import {GroupCommand} from "./Groups";
import {PlaydatesCommand} from "./Playdates";
import {RESTPostAPIChatInputApplicationCommandsJSONBody} from "discord.js";
import {Nullable} from "../../types/Nullable";
import {ServerCommand} from "./Server";

const commands: Set<Command> = new Set<Command>([
  new HelloWorldCommand(),
  new GroupCommand(),
  new PlaydatesCommand(),
  new ServerCommand()
]);

export default class Commands {
  private mappedCommands: Map<string, Command> = new Map<string, Command>();
  private definitions: Nullable<RESTPostAPIChatInputApplicationCommandsJSONBody[]>;

  constructor() {
    this.mappedCommands = this.getMap();
  }

  public getCommand(commandName: string): CommandUnion | undefined {
    if (!this.mappedCommands.has(commandName)) {
      throw new Error(`Unknown command: ${commandName}`);
    }

    return this.mappedCommands.get(commandName);
  }

  public get allCommands(): Set<Command> {
    return commands;
  }

  public getJsonDefinitions(): RESTPostAPIChatInputApplicationCommandsJSONBody[] {
    if (this.definitions) {
      return this.definitions;
    }

    this.definitions = [];
    commands.forEach((command) => {
      this.definitions?.push(command.definition().toJSON())
    })
    return this.definitions;
  }

  private getMap(): Map<string, Command> {
    const map = new Map<string, Command>();
    for (const command of commands) {
      const definition = command.definition()
      map.set(definition.name, command);
    }

    return map;
  }
}