package httpx

import (
	"encoding/json"
	"io"
	"net/http"
	"strings"
)

func JSON(w http.ResponseWriter, status int, v any) {
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.WriteHeader(status)
	_ = json.NewEncoder(w).Encode(v)
}

func Error(w http.ResponseWriter, status int, msg string) {
	JSON(w, status, map[string]any{"error": msg})
}

func DecodeJSON(r *http.Request, dst any, max int64) error {
	dec := json.NewDecoder(io.LimitReader(r.Body, max))
	dec.DisallowUnknownFields()
	return dec.Decode(dst)
}

func SameOrigin(r *http.Request) bool {
	origin := r.Header.Get("Origin")
	if origin == "" {
		return true
	}
	host := r.Host
	return strings.HasSuffix(origin, "://"+host)
}