import {
  Client,
  Events,
  GatewayIntentBits,
  Interaction,
  Partials,
} from "discord.js";
import { commandMap } from "./commands";
import { BotConfig } from "./config";

export async function startBot(config: BotConfig): Promise<Client> {
  const client = new Client({
    intents: [GatewayIntentBits.Guilds],
    partials: [Partials.Channel],
  });

  client.once(Events.ClientReady, (readyClient) => {
    console.log(`Bot ready as ${readyClient.user.tag}`);
  });

  client.on(Events.InteractionCreate, async (interaction: Interaction) => {
    if (!interaction.isChatInputCommand()) {
      return;
    }

    const command = commandMap.get(interaction.commandName);
    if (!command) {
      await interaction.reply({
        content: `Unknown command: ${interaction.commandName}`,
        ephemeral: true,
      });
      return;
    }

    try {
      await command.execute(interaction);
    } catch (error: unknown) {
      console.error(`Command failed: ${interaction.commandName}`, error);

      if (interaction.replied || interaction.deferred) {
        await interaction.followUp({
          content: "Command failed. Try again.",
          ephemeral: true,
        });
      } else {
        await interaction.reply({
          content: "Command failed. Try again.",
          ephemeral: true,
        });
      }
    }
  });

  await client.login(config.discordToken);
  return client;
}