// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.

package codec

import (
_	"fmt"
	"github.com/stretchr/testify/assert"
_	"log"
	"strings"
	"testing"
	"github.com/xeipuuv/gojsonschema"
	"io"
	"bytes"
	"google.golang.org/protobuf/proto"
)

type TestUser struct {
	Name string `json:"name" yaml:"name" protobuf:"bytes,1,opt,name=name"`
	Uid string `json:"uid" yaml:"uid" protobuf:"bytes,2,opt,name=uid"`
	Group string `json:"group" yaml:"group" protobuf:"bytes,3,opt,name=group"`
	Home string `json:"home" yaml:"home" protobuf:"bytes,4,opt,name=home"`
	State string `json:"state" yaml:"state" protobuf:"bytes,5,opt,name=state"`
}

func TestNewYAMLDecoder(t *testing.T) {
	e := NewYAMLDecoder(strings.NewReader(""))
	assert.NotNil(t, e)
}

func TestNewDecoderDecodeJSON(t *testing.T) {
	schema:=`
{
  "$id": "user",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "user",
  "type": "object",
  "required": [ "name" ],
  "properties": {
    "path": {
      "type": "string",
      "description": "user name",
      "minLength": 1
    }
  }
}
`
	decl := `{
  "name": "testuser",
  "uid": "12001",
  "group": "12001",
  "home": "/home/testuser",
  "state": "present"
}`

	jsonReader := strings.NewReader(decl)
	user := &TestUser{}

	e := NewJSONDecoder(jsonReader)
	assert.NotNil(t, e)
	docErr := e.Decode(user)
	assert.Nil(t, docErr)

	schemaLoader := gojsonschema.NewStringLoader(schema)
	loader := gojsonschema.NewStringLoader(decl)
	result, validateErr := gojsonschema.Validate(schemaLoader, loader)
	assert.True(t, result.Valid())
	assert.Nil(t, validateErr)
}

func TestNewJSONStringDecoder(t *testing.T) {
	decl := `{
  "name": "testuser",
  "uid": "12001",
  "group": "12001",
  "home": "/home/testuser",
  "state": "present"
}`

	e := NewJSONStringDecoder(decl)
	assert.NotNil(t, e)
	docErr := e.Decode(&TestUser{})
	assert.Nil(t, docErr)
}

func TestNewDecoder(t *testing.T) {
	pbData, err := proto.Marshal(&TestPBUser{ Name: "pb", Uid: "15001", Group: "15005", Home: "/home/pb", State: "present" })
	assert.Nil(t, err)
	for _, v := range []struct{ reader io.Reader; format Format; expectedhome string } {
		{ reader: strings.NewReader(`{
  "name": "testuser",
  "uid": "12001",
  "group": "12001",
  "home": "/home/testuser",
  "state": "present" }`), format: FormatJson, expectedhome: "/home/testuser" },
		{ reader: strings.NewReader(`
  name: "testuser"
  uid: "12001"
  group: "12001"
  home: "/home/test"
  state: "present"
`), format: FormatYaml, expectedhome: "/home/test" },
		{ reader: bytes.NewReader(pbData), format: FormatProtoBuf, expectedhome: "/home/pb" },
	} {

		decoder := NewDecoder(v.reader,  v.format)
		assert.NotNil(t, decoder)
		u := &TestPBUser{}
		assert.Nil(t, decoder.Decode(u))
		assert.Equal(t, v.expectedhome, u.Home )
	}
}

func TestNewDecoderError(t *testing.T) {
	pbData, err := proto.Marshal(&TestPBUser{ Name: "pb", Uid: "15001", Group: "15005", Home: "/home/pb", State: "present" })
	assert.Nil(t, err)

	decoder := NewDecoder(bytes.NewReader(pbData),  Format("foo"))
	assert.Nil(t, decoder)
}

func TestNewStringDecoder(t *testing.T) {
	jsonDoc := `{
  "name": "testuser",
  "uid": "12001",
  "group": "12001",
  "home": "/home/testuser",
  "state": "present" }`
	decoder := NewStringDecoder(jsonDoc, FormatJson)
	assert.NotNil(t, decoder)
	u := &TestUser{}
	assert.Nil(t, decoder.Decode(u))
	assert.Equal(t, "testuser", u.Name)
	
}