package handlers

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
)

// readJSON reads and decodes JSON from request body
func readJSON(r *http.Request, v interface{}) error {
	body, err := ioutil.ReadAll(r.Body)
	if err != nil {
		return fmt.Errorf("failed to read request body: %v", err)
	}

	if err := json.Unmarshal(body, v); err != nil {
		return fmt.Errorf("invalid request format: %v", err)
	}

	return nil
}

// writeJSON writes JSON response with proper headers
func writeJSON(w http.ResponseWriter, v interface{}) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(v)
}

// LogMiddleware logs all HTTP requests
func LogMiddleware(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		log.Printf("%s %s", r.Method, r.URL.Path)
		next.ServeHTTP(w, r)
	})
}