/**
 * @copyright nhcarrigan
 * @license Naomi's Public License
 * @author Naomi Carrigan
 */

import { blockedIps } from "../cache/blockedIps.js";
import { database } from "../db/database.js";
import { announceOnBluesky } from "../modules/announceOnBluesky.js";
import { announceOnDiscord } from "../modules/announceOnDiscord.js";
import { announceOnReddit } from "../modules/announceOnReddit.js";
import { announceOnTwitter } from "../modules/announceOnTwitter.js";
import { getIpFromRequest } from "../modules/getIpFromRequest.js";
import { summarisePost } from "../modules/summarisePost.js";
import type { FastifyPluginAsync } from "fastify";

const oneDay = 24 * 60 * 60 * 1000;

/**
 * Mounts the entry routes for the application. These routes
 * should not require CORS, as they are used by external services
 * such as our uptime monitor.
 * @param server - The Fastify server instance.
 */
export const announcementRoutes: FastifyPluginAsync = async(server) => {
  server.get("/announcements", async(_request, reply) => {
    const announcements = await database.getInstance().announcements.findMany({
      orderBy: {
        createdAt: "desc",
      },
      take: 10,
    });
    return await reply.status(200).type("application/json").
      send(announcements.map((announcement) => {
        return {
          content:   announcement.content,
          createdAt: announcement.createdAt,
          title:     announcement.title,
          type:      announcement.type,
        };
      }));
  });

  // eslint-disable-next-line @typescript-eslint/naming-convention -- Fastify requires Body instead of body.
  server.post<{ Body: { title: string; content: string; type: string } }>(
    "/announcement",
    // eslint-disable-next-line complexity, max-statements -- This is a complex route, but it is necessary to validate the announcement.
    async(request, reply) => {
      const token = request.headers.authorization;
      if (token === undefined || token !== process.env.ANNOUNCEMENT_TOKEN) {
        blockedIps.push({
          ip:  getIpFromRequest(request),
          ttl: new Date(Date.now() + oneDay),
        });
        return await reply.status(401).send({
          error:
            // eslint-disable-next-line stylistic/max-len -- Big boi string.
            "This endpoint requires a special auth token. If you believe you should have access, please contact Naomi. To protect our services, your IP has been blocked from all routes for 24 hours.",
        });
      }

      const { title, content, type } = request.body;
      if (
        typeof title !== "string"
        || typeof content !== "string"
        || typeof type !== "string"
        || title.length === 0
        || content.length === 0
        || type.length === 0
      ) {
        return await reply.status(400).send({
          error: "Missing required fields.",
        });
      }

      if (title.length < 20) {
        return await reply.status(400).send({
          error:
            // eslint-disable-next-line stylistic/max-len -- Big boi string.
            "Title must be at least 20 characters long so that it may be posted on our forum.",
        });
      }

      if (content.length < 50) {
        return await reply.status(400).send({
          error:
            // eslint-disable-next-line stylistic/max-len -- Big boi string.
            "Content must be at least 50 characters long so that it may be posted on our forum.",
        });
      }

      if (type !== "products" && type !== "community") {
        return await reply.status(400).send({
          error: "Invalid announcement type.",
        });
      }

      await database.getInstance().announcements.create({
        data: {
          content,
          title,
          type,
        },
      });

      const discord = await announceOnDiscord(title, content, type);
      const reddit = await announceOnReddit(title, content, type);
      const summary = await summarisePost(title, content);
      if (summary === null) {
        return await reply.status(201).send({
          message: `Announcement processed. Discord: ${discord}, Reddit: ${reddit}, Bluesky: Skipped (AI summarisation failed), Twitter: Skipped (AI summarisation failed).`,
        });
      }
      if (summary.length > 280) {
        return await reply.status(201).send({
          message: `Announcement processed. Discord: ${discord}, Reddit: ${reddit}, Bluesky: Skipped (AI summary too long), Twitter: Skipped (AI summary too long).`,
        });
      }

      const bluesky = await announceOnBluesky(summary);
      const twitter = await announceOnTwitter(summary);
      return await reply.status(201).send({
        message: `Announcement processed. Discord: ${discord}, Reddit: ${reddit}, Bluesky: ${bluesky}, Twitter: ${twitter}`,
      });
    },
  );
};