package routes

import (
	"bytes"
	"encoding/json"
	"io"
	"log"
	"net/http"

	"tomatentum.net/svg-templater/pkg/svg/actions"
)

func CreateSVG(writer http.ResponseWriter, r *http.Request) {

	contentType := r.Header.Get("Content-Type")
	if contentType != "image/svg+xml" {
		http.Error(writer, "Incorrect Content-Type. Needs image/svg+xml.", http.StatusUnsupportedMediaType)
		return
	}

	readsvg, err := io.ReadAll(r.Body)
	if err != nil {
		http.Error(writer, err.Error(), http.StatusInternalServerError)
		log.Println("Error while reading Body\n", err)
		return
	}

	if ok, err := validateSVG(readsvg); err != nil || !ok {
		http.Error(writer, err.Error(), http.StatusUnsupportedMediaType)
		log.Println("Wrong Media Type was uploaded\n", err)
		return
	}

	data, err := actions.Create(readsvg)

	if err != nil {
		http.Error(writer, err.Error(), http.StatusInternalServerError)
		log.Println("Failed creating SVG template\n", err)
		return
	}

	writer.Header().Add("Content-Type", "application/json")
	json.NewEncoder(writer).Encode(data)
	log.Println("Created SVG Template " + data.Id)
}

func validateSVG(svgbuf []byte) (bool, error) {
	return bytes.Contains(svgbuf[:512], []byte("<svg")), nil
}