package main

import (
	"fmt"
	"net/http"
)

func (app *application) serverErrorResponse(w http.ResponseWriter, r *http.Request, err error) {
	app.logError(r, err)

	message := "the server encountered a problem and could not process your request"
	app.errorResponse(w, r, http.StatusInternalServerError, message)
}

// The logError() method is a generic helper for logging an error message.
func (app *application) logError(r *http.Request, err error) {
	app.Logger.Errorw("Error",
		"Request URI", r.RequestURI,
		"error", err,
	)
}

func (app *application) errorResponse(w http.ResponseWriter, r *http.Request, status int, message interface{}) {

	// Write the response using the writeJSON() helper. If this happens to return an
	// error then log it, and fall back to sending the client an empty response with a
	// 500 Internal Server Error status code.
	fmt.Fprintf(w, "Error: %d", status)
}

func (app *application) badRequestResponse(w http.ResponseWriter, r *http.Request, err error) {
	app.errorResponse(w, r, http.StatusBadRequest, err.Error())
}

func (app *application) notFoundResponse(w http.ResponseWriter, r *http.Request) {
	message := "the requested resource could not be found"
	app.errorResponse(w, r, http.StatusNotFound, message)
}

func (app *application) editConflictResponse(w http.ResponseWriter, r *http.Request) {
	message := "unable to update the record due to an edit conflict, please try again"
	app.errorResponse(w, r, http.StatusConflict, message)
}

func (app *application) methodNotAllowedResponse(w http.ResponseWriter, r *http.Request) {
	message := fmt.Sprintf("the %s method is not supported for this resource", r.Method)
	app.errorResponse(w, r, http.StatusMethodNotAllowed, message)
}