// Copyright 2021 Harness Inc. All rights reserved.
// Use of this source code is governed by the Polyform Free Trial License
// that can be found in the LICENSE.md file for this repository.

package render

import (
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"strconv"
)

// indent the json-encoded API responses
var indent bool

func init() {
	indent, _ = strconv.ParseBool(
		os.Getenv("HTTP_JSON_INDENT"),
	)
}

// ErrorCode writes the json-encoded error message to the response.
func ErrorCode(w http.ResponseWriter, err error, status int) {
	JSON(w, &Error{Message: err.Error()}, status)
}

// InternalError writes the json-encoded error message to the response
// with a 500 internal server error.
func InternalError(w http.ResponseWriter, err error) {
	ErrorCode(w, err, 500)
}

// InternalErrorf writes the json-encoded error message to the response
// with a 500 internal server error.
func InternalErrorf(w http.ResponseWriter, format string, a ...interface{}) {
	ErrorCode(w, fmt.Errorf(format, a...), 500)
}

// NotFound writes the json-encoded error message to the response
// with a 404 not found status code.
func NotFound(w http.ResponseWriter, err error) {
	ErrorCode(w, err, 404)
}

// NotFoundf writes the json-encoded error message to the response
// with a 404 not found status code.
func NotFoundf(w http.ResponseWriter, format string, a ...interface{}) {
	ErrorCode(w, fmt.Errorf(format, a...), 404)
}

// Unauthorized writes the json-encoded error message to the response
// with a 401 unauthorized status code.
func Unauthorized(w http.ResponseWriter, err error) {
	ErrorCode(w, err, 401)
}

// Unauthorizedf writes the json-encoded error message to the response
// with a 401 unauthorized status code.
func Unauthorizedf(w http.ResponseWriter, format string, a ...interface{}) {
	ErrorCode(w, fmt.Errorf(format, a...), 401)
}

// Forbidden writes the json-encoded error message to the response
// with a 403 forbidden status code.
func Forbidden(w http.ResponseWriter, err error) {
	ErrorCode(w, err, 403)
}

// Forbiddenf writes the json-encoded error message to the response
// with a 403 forbidden status code.
func Forbiddenf(w http.ResponseWriter, format string, a ...interface{}) {
	ErrorCode(w, fmt.Errorf(format, a...), 403)
}

// BadRequest writes the json-encoded error message to the response
// with a 400 bad request status code.
func BadRequest(w http.ResponseWriter, err error) {
	ErrorCode(w, err, 400)
}

// BadRequestf writes the json-encoded error message to the response
// with a 400 bad request status code.
func BadRequestf(w http.ResponseWriter, format string, a ...interface{}) {
	ErrorCode(w, fmt.Errorf(format, a...), 400)
}

// JSON writes the json-encoded error message to the response
// with a 400 bad request status code.
func JSON(w http.ResponseWriter, v interface{}, status int) {
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.Header().Set("X-Content-Type-Options", "nosniff")
	w.WriteHeader(status)
	enc := json.NewEncoder(w)
	if indent {
		enc.SetIndent("", "  ")
	}
	enc.Encode(v)
}