package httpapi

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

// Problem is RFC 9457 application/problem+json.
type Problem struct {
	Type     string         `json:"type,omitempty"`
	Title    string         `json:"title"`
	Status   int            `json:"status"`
	Detail   string         `json:"detail,omitempty"`
	Instance string         `json:"instance,omitempty"`
}

func writeProblem(w http.ResponseWriter, status int, title, detail string) {
	w.Header().Set("Content-Type", "application/problem+json")
	w.WriteHeader(status)
	_ = json.NewEncoder(w).Encode(Problem{
		Type:   "about:blank",
		Title:  title,
		Status: status,
		Detail: detail,
	})
}

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

func writeNoContent(w http.ResponseWriter) {
	w.WriteHeader(http.StatusNoContent)
}