/*
 * Copyright (c) 2020 Alex aka mailoman <alex@webz.asia>
 *
 *  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.
 *
 *   @author Alex aka mailoman <alex@webz.asia>
 *   @copyright Copyright (c) 2020 Alex aka mailoman <alex@webz.asia>
 *   @since 14.01.2020
 *
 */

package fields_test

import (
	"testing"

	"github.com/satori/go.uuid"
	"github.com/stretchr/testify/assert"

	"git.webz.asia/go-convert/fields"
)

type FromStruct struct {
	ID     string `conv:"new,update"`
	Field1 string `conv:"new,update"`
	Field2 string `conv:"update"`
	Field3 string `conv:"update,omit"`
	Field4 string `conv:"category-1,omitempty"`
}

type FromStructNone struct {
	ID     string `conv1:"new,update"`
	Field1 string `conv2:"new,update"`
	Field2 string `conv3:"update"`
}

type ToStruct struct {
	ID     string
	Field1 string
	Field2 string
	Field3 string
	Field4 string
}

type ToStruct2 struct {
	Id     string
	Field1 string
	Field2 string
	Field3 string
	Field4 string
}

type FromStructCustom struct {
	ID     string `copy:"new,update"`
	Field1 string `copy:"new,update"`
	Field2 string `copy:"update"`
	Field3 string `copy:"update,ignore"`
	Field4 string `copy:"category-1,noempty"`
}

type FromStructBase struct {
	ID     string `conv:"new,update"`
	Field1 string `conv:"new,update"`
}

type FromStructExtraBase struct {
	ID     uuid.UUID `conv:"new,update"`
	Field1 string    `conv:"new,update"`
}

type FromStructCombined struct {
	FromStructBase `conv:"new,update"`
	Field2         string `conv:"update"`
	Field3         string `conv:"update,omit"`
	Field4         string `conv:"category-1,omitempty"`
}

type FromStructCombinedExtra struct {
	FromStructExtraBase `conv:"new,update"`
	Field2              uuid.UUID `conv:"update"`
	Field3              string    `conv:"update,omit"`
	Field4              string    `conv:"category-1,omitempty"`
}

var (
	// testsNormal provides normal test cases
	testsNormal = []struct {
		from       FromStruct
		kind       string
		to         ToStruct
		expectedTo ToStruct
	}{
		// case 1.1
		{
			FromStruct{
				"1", "field 1 value", "field 2 value", "omitting", "",
			},
			"new",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct{
				"1", "field 1 value", "old field 2 value", "old field 3 value", "",
			},
		},
		// case 1.2
		{
			FromStruct{
				"1", "field 1 value", "field 2 value", "omitting", "",
			},
			"update",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct{
				"1", "field 1 value", "field 2 value", "old field 3 value", "",
			},
		},
		// case 1.3.1
		{
			FromStruct{
				"1", "field 1 value", "field 2 value", "omitting", "",
			},
			"category-1",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
			},
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
			},
		},
		// case 1.3.2
		{
			FromStruct{
				"1", "field 1 value", "field 2 value", "omitting", "not empty",
			},
			"category-1",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
			},
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "not empty",
			},
		},
	}

	// testsNone provides not applicable test cases
	testsNone = []struct {
		from       FromStructNone
		kind       string
		to         ToStruct
		expectedTo ToStruct
	}{
		// case 1.1
		{
			FromStructNone{
				"1", "field 1 value", "field 2 value",
			},
			"new",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
		},
		// case 1.2
		{
			FromStructNone{
				"1", "field 1 value", "field 2 value",
			},
			"update",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
		},
	}

	// testsNegative provides failing test cases
	testsNegative = []struct {
		from       interface{}
		kind       string
		to         ToStruct
		expectedTo ToStruct
	}{
		// case 1
		{
			"string value",
			"new",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
		},
		// case 2
		{
			1,
			"update",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
		},
		// case 3
		{
			nil,
			"update",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
		},
	}

	// testsCustomNormal provides normal test cases with custom init config
	testsCustomNormal = []struct {
		from       FromStructCustom
		kind       string
		to         ToStruct
		expectedTo ToStruct
	}{
		// case 1.1
		{
			FromStructCustom{
				"1", "field 1 value", "field 2 value", "omitting", "",
			},
			"new",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct{
				"1", "field 1 value", "old field 2 value", "old field 3 value", "",
			},
		},
		// case 1.2
		{
			FromStructCustom{
				"1", "field 1 value", "field 2 value", "omitting", "",
			},
			"update",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct{
				"1", "field 1 value", "field 2 value", "old field 3 value", "",
			},
		},
		// case 1.3.1
		{
			FromStructCustom{
				"1", "field 1 value", "field 2 value", "omitting", "",
			},
			"category-1",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
			},
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
			},
		},
		// case 1.3.2
		{
			FromStructCustom{
				"1", "field 1 value", "field 2 value", "omitting", "not empty",
			},
			"category-1",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
			},
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "not empty",
			},
		},
	}

	// testsCombinedNormal provides normal test cases with embedded structs
	testsCombinedNormal = []struct {
		from       FromStructCombined
		kind       string
		to         ToStruct
		expectedTo ToStruct
	}{
		// case 3.1
		{
			FromStructCombined{
				FromStructBase{"1", "field 1 value"}, "field 2 value", "omitting", "",
			},
			"new",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct{
				"1", "field 1 value", "old field 2 value", "old field 3 value", "",
			},
		},
		// case 3.2
		{
			FromStructCombined{
				FromStructBase{"1", "field 1 value"}, "field 2 value", "omitting", "",
			},
			"update",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct{
				"1", "field 1 value", "field 2 value", "old field 3 value", "",
			},
		},
		// case 3.3.1
		{
			FromStructCombined{
				FromStructBase{"1", "field 1 value"}, "field 2 value", "omitting", "",
			},
			"category-1",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
			},
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
			},
		},
		// case 3.3.2
		{
			FromStructCombined{
				FromStructBase{"1", "field 1 value"}, "field 2 value", "omitting", "not empty",
			},
			"category-1",
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
			},
			ToStruct{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "not empty",
			},
		},
	}

	// testsCombinedExtra provides normal test cases with embedded structs with more features
	testsCombinedExtra = []struct {
		from       FromStructCombinedExtra
		kind       string
		to         ToStruct2
		expectedTo ToStruct2
	}{
		// case 4.1
		{
			FromStructCombinedExtra{
				FromStructExtraBase{uuid.FromStringOrNil("bb9f2a39-1dbd-4929-8e87-4863696d9cb3"), "field 1 value"}, uuid.FromStringOrNil("d039089d-27f5-438b-8b70-90eb3df0d79b"), "omitting", "",
			},
			"new",
			ToStruct2{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct2{
				"bb9f2a39-1dbd-4929-8e87-4863696d9cb3", "field 1 value", "old field 2 value", "old field 3 value", "",
			},
		},
		// case 4.2
		{
			FromStructCombinedExtra{
				FromStructExtraBase{uuid.FromStringOrNil("bb9f2a39-1dbd-4929-8e87-4863696d9cb3"), "field 1 value"}, uuid.FromStringOrNil("d039089d-27f5-438b-8b70-90eb3df0d79b"), "omitting", "",
			},
			"update",
			ToStruct2{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
			},
			ToStruct2{
				"bb9f2a39-1dbd-4929-8e87-4863696d9cb3", "field 1 value", "d039089d-27f5-438b-8b70-90eb3df0d79b", "old field 3 value", "",
			},
		},
		// case 4.3.1
		{
			FromStructCombinedExtra{
				FromStructExtraBase{uuid.FromStringOrNil("bb9f2a39-1dbd-4929-8e87-4863696d9cb3"), "field 1 value"}, uuid.FromStringOrNil("d039089d-27f5-438b-8b70-90eb3df0d79b"), "omitting", "",
			},
			"category-1",
			ToStruct2{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
			},
			ToStruct2{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
			},
		},
		// case 4.3.2
		{
			FromStructCombinedExtra{
				FromStructExtraBase{uuid.FromStringOrNil("bb9f2a39-1dbd-4929-8e87-4863696d9cb3"), "field 1 value"}, uuid.FromStringOrNil("d039089d-27f5-438b-8b70-90eb3df0d79b"), "omitting", "not empty",
			},
			"category-1",
			ToStruct2{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
			},
			ToStruct2{
				"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "not empty",
			},
		},
	}
)

func TestConvert_Normal(t *testing.T) {
	for _, test := range testsNormal {

		to := &ToStruct{}
		*to = test.to

		fields.Сonvert(test.from, test.kind, to)

		assert.NotEmpty(t, *to)
		assert.Equal(t, test.expectedTo, *to)
	}
}

func TestConvert_None(t *testing.T) {
	for _, test := range testsNone {

		to := &ToStruct{}
		*to = test.to

		fields.Сonvert(test.from, test.kind, to)

		assert.NotEmpty(t, *to)
		assert.Equal(t, test.expectedTo, *to)
	}
}

func TestConvert_Negative(t *testing.T) {
	for _, test := range testsNegative {

		to := &ToStruct{}
		*to = test.to

		fields.Сonvert(test.from, test.kind, to)

		assert.NotEmpty(t, *to)
		assert.Equal(t, test.expectedTo, *to)
	}
}

func TestConvert_Custom(t *testing.T) {
	fields.SetTagName("copy")
	fields.SetOmitTagName("ignore")
	fields.SetOmitEmptyTagName("noempty")
	for _, test := range testsCustomNormal {

		to := &ToStruct{}
		*to = test.to

		fields.Сonvert(test.from, test.kind, to)

		assert.NotEmpty(t, *to)
		assert.Equal(t, test.expectedTo, *to)
	}
}

func TestSetDefaults(t *testing.T) {
	// not default values after previous tests
	assert.NotEqual(t, "conv", fields.ConvertTagName())
	assert.NotEqual(t, "omit", fields.OmitTagName())
	assert.NotEqual(t, "omitempty", fields.OmitEmptyTagName())

	fields.SetDefaults()

	assert.Equal(t, "conv", fields.ConvertTagName())
	assert.Equal(t, "omit", fields.OmitTagName())
	assert.Equal(t, "omitempty", fields.OmitEmptyTagName())
}

func TestConvertTagName(t *testing.T) {
	defaultValue := fields.ConvertTagName()
	assert.Equal(t, "conv", defaultValue)

	newValue := "newTagName"
	fields.SetTagName(newValue)

	assert.Equal(t, newValue, fields.ConvertTagName())
}

func TestOmitTagName(t *testing.T) {
	defaultValue := fields.OmitTagName()
	assert.Equal(t, defaultValue, "omit")

	newValue := "newOmitTagName"
	fields.SetOmitTagName(newValue)

	assert.Equal(t, newValue, fields.OmitTagName())
}

func TestOmitEmptyTagName(t *testing.T) {
	defaultValue := fields.OmitEmptyTagName()
	assert.Equal(t, defaultValue, "omitempty")

	newValue := "newOmitEmptyTagName"
	fields.SetOmitEmptyTagName(newValue)

	assert.Equal(t, newValue, fields.OmitEmptyTagName())
}

func TestConvert_CombinedNormal(t *testing.T) {
	fields.SetDefaults()
	for _, test := range testsCombinedNormal {

		to := &ToStruct{}
		*to = test.to

		fields.Сonvert(test.from, test.kind, to)

		assert.NotEmpty(t, *to)
		assert.Equal(t, test.expectedTo, *to)
	}
}

func TestConvert_CombinedExtra(t *testing.T) {
	fields.SetDefaults()
	for _, test := range testsCombinedExtra {

		to := &ToStruct2{}
		*to = test.to

		fields.Сonvert(test.from, test.kind, to)

		assert.NotEmpty(t, *to)
		assert.Equal(t, test.expectedTo, *to)
	}
}