'use strict'

const Koa = require('koa')
const app = new Koa()

const config = require('./modules/config.js')

const PORT = process.env.PORT || config.server.port

const Router = require('koa-router')
const router = new Router()

const view = require('koa-nunjucks-next')

const Posts = require('./modules/posts.js')
const posts = Posts.getFolder(config.posts.folder)

app.use(
  view(`${__dirname}/views`, {
    extname: 'njk',
    globals: {
      site: config.site
    }
  })
)

const postsArray = Array.from(posts.entries())
router.get('/', async function (ctx) {
  await ctx.render('index', {
    posts: postsArray
  })
})

router.get('/post/:filename', async function (ctx) {
  ctx.assert(posts.has(ctx.params.filename), 404, 'Post not found')
  const post = posts.get(ctx.params.filename)
  post.body = Posts.render(post)
  await ctx.render('post', {
    post: post
  })
})

const taxonomies = Posts.taxonomise(config.taxonomies, posts)
for (let [term, items] of taxonomies) {
  router.get(`/${term}/:value`, async function (ctx) {
    const value = ctx.params.value
    ctx.assert(
      items.has(ctx.params.value),
      404,
      `Could not find ${term} ${value}`
    )
    await ctx.render('term', {
      term: term,
      [term]: value,
      posts: items.get(ctx.params.value)
    })
  })
}

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

module.exports = app

if (require.main === module) {
  app.listen(PORT, () => {
    console.log(`App listening on port ${PORT}`)
  })
}