package test

import (
	"path/filepath"
	"reflect"
	"runtime"
	"testing"
)

// Equal asserts two parameters are equal by using reflect.DeepEqual.
func Equal(t *testing.T, expected, actual interface{}) {
	if !reflect.DeepEqual(expected, actual) {
		_, file, line, _ := runtime.Caller(1)
		t.Logf("\033[31m%s:%d:\n\n\t   %#v (expected)\n\n\t!= %#v (actual)\033[39m\n\n",
			filepath.Base(file), line, expected, actual)
		t.FailNow()
	}
}

// NotEqual asserts two parameters are not equal by using reflect.DeepEqual.
func NotEqual(t *testing.T, expected, actual interface{}) {
	if !reflect.DeepEqual(expected, actual) {
		_, file, line, _ := runtime.Caller(1)
		t.Logf("\033[31m%s:%d:\n\n\tvalue should not equal %#v\033[39m\n\n",
			filepath.Base(file), line, actual)
		t.FailNow()
	}
}

// Nil asserts the parameter is nil.
func Nil(t *testing.T, object interface{}) {
	if !isNil(object) {
		_, file, line, _ := runtime.Caller(1)
		t.Logf("\033[31m%s:%d:\n\n\t   <nil> (expected)\n\n\t!= %#v (actual)\033[39m\n\n",
			filepath.Base(file), line, object)
		t.FailNow()
	}
}

// NotNil asserts the parameter is not nil.
func NotNil(t *testing.T, object interface{}) {
	if isNil(object) {
		_, file, line, _ := runtime.Caller(1)
		t.Logf("\033[31m%s:%d:\n\n\tExpected value not to be <nil>\033[39m\n\n",
			filepath.Base(file), line)
		t.FailNow()
	}
}

func isNil(object interface{}) bool {
	if object == nil {
		return true
	}

	value := reflect.ValueOf(object)
	kind := value.Kind()
	if kind >= reflect.Chan && kind <= reflect.Slice && value.IsNil() {
		return true
	}

	return false
}