import { FastifyInstance } from "fastify";

import { GetSchema, IGetSchema } from "../types/requests";
import handlePage from "../handlers/main";
import { generateRequestUrl } from "../utils";

import { NotHtmlMimetypeError } from "../errors";

export default async function getRoute(fastify: FastifyInstance) {
  fastify.get<IGetSchema>(
    "/get",
    { schema: GetSchema },
    async (request, reply) => {
      const remoteUrl = request.query.url;
      const engine = request.query.engine;

      let parsed;
      try {
        parsed = await handlePage(
          remoteUrl,
          generateRequestUrl(
            request.protocol,
            request.hostname,
            request.originalUrl
          ),
          engine
        );
      } catch (err) {
        if (err instanceof NotHtmlMimetypeError) {
          return reply.redirect(301, remoteUrl);
        } else {
          throw err;
        }
      }

      if (request.query.format === "text") {
        reply.type("text/plain; charset=utf-8");
        return parsed.textContent;
      } else {
        reply.type("text/html; charset=utf-8");
        return reply.view("/templates/get.ejs", { parsed: parsed });
      }
    }
  );
}