import { CommandInteraction, SlashCommandBuilder } from "discord.js";
import { generateDiscordMessage, safeParseInput } from "../lib/dice";

export const data = new SlashCommandBuilder()
  .setName("roll")
  .addStringOption(option =>
    option.setName("input")
      .setDescription("The expression to roll")
      .setRequired(true))
  .setDescription("Rolls dice using hallowed arc syntax");

export async function execute(interaction: CommandInteraction) {
  if (!interaction.isCommand()) return;

  const { options } = interaction;
  const input = options.get('input', true)?.value as string;

  let result = safeParseInput(input);
  if (result === null) {
    await interaction.reply("Invalid input. Please provide a valid expression.");
    return;
  }

  if (!Array.isArray(result)) {
    result = [result];
  }

  const response = generateDiscordMessage(result);

  if (response.length > 2000) {
    await interaction.reply("stop that.\n-# (The result is too long to display in a single message. Please try a smaller input.)");
    return;
  }

  await interaction.reply(response);
}