package app

import (
	"encoding/json"
	"math/rand"
	"strings"

	"git.macaw.me/skunky/devianter"
)

type API struct {
  main *skunkyart
}

type info struct {
  Version string `json:"version"`
  Settings settingsParams `json:"settings"`
}

func (a API) Info() {
  json, err := json.Marshal(info{
    Version: a.main.Version,
    Settings: settingsParams{
      Nsfw: CFG.Nsfw,
      Proxy: CFG.Proxy,
    },
  })
  try(err)
  a.main.Writer.Write(json)
  return
}

func (a API) Error(description string, status int) {
  a.main.Writer.WriteHeader(status)
  var response strings.Builder
  response.WriteString(`{"error":"`)
  response.WriteString(description)
  response.WriteString(`"}`)
  wr(a.main.Writer, response.String())
}

func (a API) sendMedia(d *devianter.Deviation) {
  mediaUrl, name := devianter.UrlFromMedia(d.Media)
	a.main.SetFilename(name)
	
  if len(mediaUrl) != 0 {
    mediaUrl = mediaUrl[21:]
		dot := strings.Index(mediaUrl, ".")
		a.main.Writer.Header().Del("Content-Type")
    a.main.DownloadAndSendMedia(mediaUrl[:dot], mediaUrl[dot+11:])
  }
}

// TODO: сделать фильтры
func (a API) Random() {
  for attempt := 1;; {
    if attempt > 3 {
      a.Error("Sorry, butt NSFW on this are disabled, and the instance failed to find a random art without NSFW", 500)
    }
    
    s, err := devianter.PerformSearch(string(rand.Intn(999)), rand.Intn(30), 'a')
    try(err)
    deviation := &s.Results[rand.Intn(len(s.Results))]
    
    if deviation.NSFW && !CFG.Nsfw {
      attempt++
      continue
    }
    
    a.sendMedia(deviation)
    return
  }    
}