"use strict";

const Koa = require("koa");
const app = new Koa();

const helmet = require("koa-helmet");

const actions = require("./actions.js");
const responders = require("./responders.js");

const Router = require("koa-router");
const router = new Router();

const makeTagURI = (authority, startDate) => specific =>
  `tag:${authority},${startDate}:${specific}`;

module.exports = async function(config) {
  const Posts = await require("./domain/posts.js")(config.posts, basename =>
    router.url("post", basename)
  );

  app.context.getURL = router.url.bind(router);
  app.context.makeTagURI = makeTagURI(
    config.feed.originalDomainName,
    config.feed.domainStartDate
  );

  router.get("home", "/", actions.home(config, responders.home, Posts.posts));

  router.get(
    "posts",
    "/post",
    actions.posts(config, responders.list, Posts.posts)
  );

  router.get(
    "highlight-theme",
    "/css/code.css",
    actions.highlightTheme(config)
  );

  router.get(
    "feed",
    "/index.xml",
    actions.posts(config, responders.feed, Posts.posts)
  );

  router.get(
    "post",
    "/post/:filename",
    actions.post(config, responders.post, Posts.posts)
  );

  router.get("tags", "/tag", actions.tags(config, responders.tags, Posts.tags));

  router.get(
    "tag",
    "/tag/:name",
    actions.tag(config, responders.list, Posts.tags)
  );

  app.use(
    helmet({
      hsts: {
        setIf: ctx => ctx.secure
      }
    })
  );

  app.use(router.routes()).use(router.allowedMethods());

  app.use(actions.serveFiles);

  return app;
};