import path from 'path'
import fs from 'fs/promises'
import { Flaska, FileResponse, HttpError } from 'flaska'

export function run(http, port, core) {
  let localUtil = new core.sc.Util(import.meta.url)
  const staticRoot = localUtil.getPathFromRoot('../public')

  const flaska = new Flaska({
    log: core.log,
  }, http)

  flaska.before(function(ctx) {
    ctx.state.started = new Date().getTime()
  })

  flaska.after(function(ctx) {
    let ended = new Date().getTime()
    var requestTime = ended - ctx.state.started

    let status = ''
    let level = 'info'
    if (ctx.status >= 400) {
      status = ctx.status + ' '
      level = 'warn'
    }
    if (ctx.status >= 500) {
      level = 'error'
    }

    ctx.log[level]({
      duration: requestTime,
      status: ctx.status,
    }, `<-- ${status}${ctx.method} ${ctx.url}`)
  })

  flaska.get('/::file', function(ctx) {
    if (ctx.params.file.startsWith('api/')) {
      throw new HttpError(404, 'Not Found: ' + ctx.params.file, { status: 404, message: 'Not Found: ' + ctx.params.file })
    }

    let file = path.resolve(path.join(staticRoot, ctx.params.file ? ctx.params.file : 'index.html'))

    if (!file.startsWith(staticRoot)) {
      ctx.status = 404
      ctx.body = 'HTTP 404 Error'
      return
    }

    return fs.stat(file).catch(function(err) {
      if (err.code === 'ENOENT') {
        file = path.resolve(path.join(staticRoot, 'index.html'))
        return fs.stat(file)
      }
      return Promise.reject(err)
    })
    .then(function(stat) {
      ctx.body = new FileResponse(file, stat)
    })
  })

  return flaska.listenAsync(port).then(function() {
    core.log.info('Server is listening on port ' + port)
  })
}