package middleware

import (
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func TestNewReplacer(t *testing.T) {
	w := httptest.NewRecorder()
	recordRequest := NewResponseRecorder(w)
	userJSON := `{"username": "dennis"}`

	reader := strings.NewReader(userJSON) //Convert string to reader

	request, err := http.NewRequest("POST", "http://caddyserver.com", reader) //Create request with JSON body
	if err != nil {
		t.Fatalf("Request Formation Failed \n")
	}
	replaceValues := NewReplacer(request, recordRequest, "")

	switch v := replaceValues.(type) {
	case replacer:

		if v.replacements["{host}"] != "caddyserver.com" {
			t.Errorf("Expected host to be caddyserver.com")
		}
		if v.replacements["{method}"] != "POST" {
			t.Errorf("Expected request method  to be POST")
		}
		if v.replacements["{status}"] != "200" {
			t.Errorf("Expected status to be 200")
		}

	default:
		t.Fatalf("Return Value from New Replacer expected pass type assertion into a replacer type   \n")
	}
}

func TestReplace(t *testing.T) {
	w := httptest.NewRecorder()
	recordRequest := NewResponseRecorder(w)
	userJSON := `{"username": "dennis"}`

	reader := strings.NewReader(userJSON) //Convert string to reader

	request, err := http.NewRequest("POST", "http://caddyserver.com", reader) //Create request with JSON body
	if err != nil {
		t.Fatalf("Request Formation Failed \n")
	}
	replaceValues := NewReplacer(request, recordRequest, "")

	switch v := replaceValues.(type) {
	case replacer:

		if v.Replace("This host is {host}") != "This host is caddyserver.com" {
			t.Errorf("Expected host replacement failed")
		}
		if v.Replace("This request method is {method}") != "This request method is POST" {
			t.Errorf("Expected method  replacement failed")
		}
		if v.Replace("The response status is {status}") != "The response status is 200" {
			t.Errorf("Expected status replacement failed")
		}

	default:
		t.Fatalf("Return Value from New Replacer expected pass type assertion into a replacer type   \n")
	}

}

func TestSet(t *testing.T) {
	w := httptest.NewRecorder()
	recordRequest := NewResponseRecorder(w)
	userJSON := `{"username": "dennis"}`

	reader := strings.NewReader(userJSON) //Convert string to reader

	request, err := http.NewRequest("POST", "http://caddyserver.com", reader) //Create request with JSON body
	if err != nil {
		t.Fatalf("Request Formation Failed \n")
	}
	replaceValues := NewReplacer(request, recordRequest, "")

	replaceValues.Set("host", "getcaddy.com")
	replaceValues.Set("method", "GET")
	replaceValues.Set("status", "201")
	replaceValues.Set("variable", "value")

	switch v := replaceValues.(type) {
	case replacer:

		if v.Replace("This host is {host}") != "This host is getcaddy.com" {
			t.Errorf("Expected host replacement failed")
		}
		if v.Replace("This request method is {method}") != "This request method is GET" {
			t.Errorf("Expected method  replacement failed")
		}
		if v.Replace("The response status is {status}") != "The response status is 201" {
			t.Errorf("Expected status replacement failed")
		}
		if v.Replace("The value of variable is {variable}") != "The value of variable is value" {
			t.Errorf("Expected status replacement failed")
		}

	default:
		t.Fatalf("Return Value from New Replacer expected pass type assertion into a replacer type   \n")
	}

}