package handler

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

	"floorvisualizer/internal/model"
)

func NewProxyClient(proxyURLStr string) *http.Client {
	u, _ := url.Parse(proxyURLStr)
	if u == nil {
		return http.DefaultClient
	}
	return &http.Client{Transport: &http.Transport{Proxy: http.ProxyURL(u)}}
}

func writeJSON(w http.ResponseWriter, status int, v any) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(status)
	if status >= 400 {
		msg := "Unknown error"
		switch x := v.(type) {
		case string:
			msg = x
		case map[string]string:
			if e, ok := x["error"]; ok {
				msg = e
			}
		}
		json.NewEncoder(w).Encode(model.ApiError{Code: status, Error: msg})
		return
	}
	json.NewEncoder(w).Encode(model.ApiResponse{Code: status, Data: v})
}

func writeErr(w http.ResponseWriter, status int, msg string) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(status)
	json.NewEncoder(w).Encode(model.ApiError{Code: status, Error: msg})
}