import { WebhookClient } from "discord.js";
import { Notification } from "../../../notifications/types";
import { ChatbotChannel } from "../schemas/ChatbotChannel";
import { ChatbotRepository, type IChatbotProfile, type IChatbotMessage } from "../schemas/ChatbotRepository";

function processTemplate(content: string): string {
  return content.replace(/<age>/g, String(Math.floor(Math.random() * 12) + 1));
}

function pickRandom<T>(arr: T[]): T | undefined {
  if (arr.length === 0) return undefined;
  return arr[Math.floor(Math.random() * arr.length)];
}

function getMessageForProfile(
  profile: IChatbotProfile,
  globalMessages: IChatbotMessage[],
): string | undefined {
  if (profile.onlySendSpecified) {
    const msg = pickRandom(profile.messages);
    return msg?.content;
  }
  const msg = pickRandom(globalMessages);
  return msg?.content;
}

export default new Notification({
  id: "chatbot",

  execute: async ({ data }) => {
    const channelId = data.channelId as string;

    const channelConfig = await ChatbotChannel.findOne({ channelId, enabled: true });
    if (!channelConfig) return;

    // Resolve repository based on mode
    let repository;
    if (channelConfig.mode === "local" && channelConfig.repositoryId) {
      repository = await ChatbotRepository.findById(channelConfig.repositoryId);
    } else {
      repository = await ChatbotRepository.findOne({ scope: "global" });
    }

    if (!repository || repository.messages.length === 0 || repository.profiles.length === 0) return;

    const profile = pickRandom(repository.profiles);
    if (!profile) return;

    const content = getMessageForProfile(profile, repository.messages);
    if (!content) return;

    const webhook = new WebhookClient({
      id: channelConfig.webhookId,
      token: channelConfig.webhookToken,
    });

    try {
      await webhook.send({
        content: processTemplate(content),
        username: profile.name,
        avatarURL: profile.avatarURL,
      });

      await ChatbotChannel.updateOne(
        { channelId },
        { $set: { lastSentAt: new Date() } },
      );
    } finally {
      webhook.destroy();
    }
  },
});