// Copyright 2016-2019 Alex Stocks
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package hessian

import (
	"bytes"
	"fmt"
	"os/exec"
	"testing"
)

var assertEqual = func(want, got []byte, t *testing.T) {
	if !bytes.Equal(want, got) {
		t.Fatalf("want %v , got %v", want, got)
	}
}

func encodeTarget(target interface{}) ([]byte, error) {
	e := NewEncoder()
	err := e.Encode(target)
	if err != nil {
		return nil, err
	}
	return e.Buffer(), nil
}

func javaDecodeValidate(method string, target interface{}) (string, error) {
	b, err := encodeTarget(target)
	if err != nil {
		return "", err
	}

	genHessianJar()
	cmd := exec.Command("java", "-jar", hessianJar, method)

	stdin, err := cmd.StdinPipe()
	if err != nil {
		fmt.Printf("call java error: %v", err)
		return "", err
	}

	go func() {
		_, _ = stdin.Write(b)
		_ = stdin.Close()
	}()

	out, err := cmd.Output()
	if err != nil {
		return "", err
	}
	return string(out), nil
}

func testJavaDecode(t *testing.T, method string, target interface{}) {
	result, err := javaDecodeValidate(method, target)
	if err != nil {
		t.Errorf("%s: encode fail with error: %v", method, err)
		return
	}

	if result != "true" {
		t.Errorf("%s: encode %v to bytes wrongly, result: %s", method, target, result)
	}
}