import { SlashCommandBuilder, ChatInputCommandInteraction } from 'discord.js';
import axios from 'axios';

const GIPHY_API_URL = 'http://api.giphy.com/v1/gifs/search';

// Initialise the command data.
export const data = new SlashCommandBuilder()
  .setName('eyecandy')
  .setDescription('Returns a random gif of Gerard Butler.');

console.log(`Loaded ${data.name} command.`);

/**
 * Execute the command, fetch a random Gerard Butler gif, and send it to the user.
 * @param interaction The interaction that triggered the command.
 * @returns A promise that resolves when the command is finished executing.
 */
export async function execute(
  interaction: ChatInputCommandInteraction
): Promise<void> {
  await interaction.deferReply();

  if (!process.env.GIPHY_API_KEY) {
    await interaction.reply('The bot is missing the GIPHY API key.');
    return;
  }

  try {
    // Fetch a random gif of Gerard Butler.
    const gifUrl = await fetchGif();

    // Reply with the gif.
    await interaction.editReply(gifUrl);
  } catch (error: any) {
    console.error('Error executing the command:', error.message);
    await interaction.editReply(`An error occurred: ${error.message}`);
  }
}

/**
 * Fetch a random gif of Gerard Butler from Giphy.
 * @returns A promise that resolves to the URL of the gif.
 * @throws An error if no gif is found or if the request fails.
 */
async function fetchGif(): Promise<string> {
  const randomOffset = Math.floor(Math.random() * 100);
  const giphyQueryUrl = `${GIPHY_API_URL}?api_key=${process.env.GIPHY_API_KEY}&q=gerard+butler&limit=1&offset=${randomOffset}`;

  try {
    const response = await axios.get(giphyQueryUrl, { timeout: 5000 });
    const result = response.data;

    if (result.data.length === 0) {
      throw new Error('No gifs found for the given query.');
    }

    return result.data[0].images.original.url;
  } catch (error: any) {
    console.error('Error fetching GIF:', error.message);
    throw new Error('Failed to retrieve a GIF from Giphy.');
  }
}