package nbt

import (
	"bytes"
	"compress/gzip"
	"reflect"
	"testing"
)

func TestUnmarshal_string(t *testing.T) {
	var data = []byte{
		0x08, 0x00, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x00, 0x09,
		0x42, 0x61, 0x6e, 0x61, 0x6e, 0x72, 0x61, 0x6d, 0x61,
	}

	//Unmarshal to string
	var Name string
	if err := Unmarshal(data, &Name); err != nil {
		t.Fatal(err)
	}

	if Name != "Bananrama" {
		t.Errorf("Unmarshal NBT fail: get %q, want %q", Name, "Bananrama")
	}

	//Unmarshal to interface{}
	var infName interface{}
	if err := Unmarshal(data, &infName); err != nil {
		t.Fatal(err)
	}

	if infName != "Bananrama" {
		t.Errorf("Unmarshal NBT fail: get %q, want %q", Name, "Bananrama")
	}
}
func TestUnmarshal_simple(t *testing.T) {
	var data = []byte{
		0x0a, 0x00, 0x0b, 0x68, 0x65, 0x6c, 0x6c, 0x6f,
		0x20, 0x77, 0x6f, 0x72, 0x6c, 0x64, 0x08, 0x00,
		0x04, 0x6e, 0x61, 0x6d, 0x65, 0x00, 0x09, 0x42,
		0x61, 0x6e, 0x61, 0x6e, 0x72, 0x61, 0x6d, 0x61,
		0x00,
	}

	//test parse
	var value struct {
		Name string `nbt:"name"`
	}
	if err := Unmarshal(data, &value); err != nil {
		t.Fatal(err)
	}
	if value.Name != "Bananrama" {
		t.Errorf("Unmarshal NBT fail: get %q, want %q", value.Name, "Bananrama")
	}

	//test skip
	var empty struct{}
	if err := Unmarshal(data, &empty); err != nil {
		t.Fatal(err)
	}
}

func TestUnmarshal_bittest(t *testing.T) {
	// Generated by vscode-hexdump
	data := []byte{
		0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0xed, 0x54, 0xcf, 0x4f, 0x1a, 0x41,
		0x14, 0x7e, 0xc2, 0x02, 0xcb, 0x96, 0x82, 0xb1,
		0xc4, 0x10, 0x63, 0xcc, 0xab, 0xb5, 0x84, 0xa5,
		0xdb, 0xcd, 0x42, 0x11, 0x89, 0xb1, 0x88, 0x16,
		0x2c, 0x9a, 0x0d, 0x1a, 0xd8, 0xa8, 0x31, 0x86,
		0xb8, 0x2b, 0xc3, 0x82, 0x2e, 0xbb, 0x66, 0x77,
		0xb0, 0xf1, 0xd4, 0x4b, 0x7b, 0x6c, 0x7a, 0xeb,
		0x3f, 0xd3, 0x23, 0x7f, 0x43, 0xcf, 0xbd, 0xf6,
		0xbf, 0xa0, 0xc3, 0x2f, 0x7b, 0x69, 0xcf, 0xbd,
		0xf0, 0x32, 0xc9, 0xf7, 0xe6, 0xbd, 0x6f, 0xe6,
		0x7b, 0x6f, 0x26, 0x79, 0x02, 0x04, 0x54, 0x72,
		0x4f, 0x2c, 0x0e, 0x78, 0xcb, 0xb1, 0x4d, 0x8d,
		0x78, 0xf4, 0xe3, 0x70, 0x62, 0x3e, 0x08, 0x7b,
		0x1d, 0xc7, 0xa5, 0x93, 0x18, 0x0f, 0x82, 0x47,
		0xdd, 0xee, 0x84, 0x02, 0x62, 0xb5, 0xa2, 0xaa,
		0xc7, 0x78, 0x76, 0x5c, 0x57, 0xcb, 0xa8, 0x55,
		0x0f, 0x1b, 0xc8, 0xd6, 0x1e, 0x6a, 0x95, 0x86,
		0x86, 0x0d, 0xad, 0x7e, 0x58, 0x7b, 0x8f, 0x83,
		0xcf, 0x83, 0x4f, 0x83, 0x6f, 0xcf, 0x03, 0x10,
		0x6e, 0x5b, 0x8e, 0x3e, 0xbe, 0xa5, 0x38, 0x4c,
		0x64, 0xfd, 0x10, 0xea, 0xda, 0x74, 0xa6, 0x23,
		0x40, 0xdc, 0x66, 0x2e, 0x69, 0xe1, 0xb5, 0xd3,
		0xbb, 0x73, 0xfa, 0x76, 0x0b, 0x29, 0xdb, 0x0b,
		0xe0, 0xef, 0xe8, 0x3d, 0x1e, 0x38, 0x5b, 0xef,
		0x11, 0x08, 0x56, 0xf5, 0xde, 0x5d, 0xdf, 0x0b,
		0x40, 0xe0, 0x5e, 0xb7, 0xfa, 0x64, 0xb7, 0x04,
		0x00, 0x8c, 0x41, 0x4c, 0x73, 0xc6, 0x08, 0x55,
		0x4c, 0xd3, 0x20, 0x2e, 0x7d, 0xa4, 0xc0, 0xc8,
		0xc2, 0x10, 0xb3, 0xba, 0xde, 0x58, 0x0b, 0x53,
		0xa3, 0xee, 0x44, 0x8e, 0x45, 0x03, 0x30, 0xb1,
		0x27, 0x53, 0x8c, 0x4c, 0xf1, 0xe9, 0x14, 0xa3,
		0x53, 0x8c, 0x85, 0xe1, 0xd9, 0x9f, 0xe3, 0xb3,
		0xf2, 0x44, 0x81, 0xa5, 0x7c, 0x33, 0xdd, 0xd8,
		0xbb, 0xc7, 0xaa, 0x75, 0x13, 0x5f, 0x28, 0x1c,
		0x08, 0xd7, 0x2e, 0xd1, 0x59, 0x3f, 0xaf, 0x1d,
		0x1b, 0x60, 0x21, 0x59, 0xdf, 0xfa, 0xf1, 0x05,
		0xfe, 0xc1, 0xce, 0xfc, 0x9d, 0xbd, 0x00, 0xbc,
		0xf1, 0x40, 0xc9, 0xf8, 0x85, 0x42, 0x40, 0x46,
		0xfe, 0x9e, 0xeb, 0xea, 0x0f, 0x93, 0x3a, 0x68,
		0x87, 0x60, 0xbb, 0xeb, 0x32, 0x37, 0xa3, 0x28,
		0x0a, 0x8e, 0xbb, 0xf5, 0xd0, 0x69, 0x63, 0xca,
		0x4e, 0xdb, 0xe9, 0xec, 0xe6, 0xe6, 0x2b, 0x3b,
		0xbd, 0x25, 0xbe, 0x64, 0x49, 0x09, 0x3d, 0xaa,
		0xbb, 0x94, 0xfd, 0x18, 0x7e, 0xe8, 0xd2, 0x0e,
		0xda, 0x6f, 0x15, 0x4c, 0xb1, 0x68, 0x3e, 0x2b,
		0xe1, 0x9b, 0x9c, 0x84, 0x99, 0xbc, 0x84, 0x05,
		0x09, 0x65, 0x59, 0x16, 0x45, 0x00, 0xff, 0x2f,
		0x28, 0xae, 0x2f, 0xf2, 0xc2, 0xb2, 0xa4, 0x2e,
		0x1d, 0x20, 0x77, 0x5a, 0x3b, 0xb9, 0x8c, 0xca,
		0xe7, 0x29, 0xdf, 0x51, 0x41, 0xc9, 0x16, 0xb5,
		0xc5, 0x6d, 0xa1, 0x2a, 0xad, 0x2c, 0xc5, 0x31,
		0x7f, 0xba, 0x7a, 0x92, 0x8e, 0x5e, 0x9d, 0x5f,
		0xf8, 0x12, 0x05, 0x23, 0x1b, 0xd1, 0xf6, 0xb7,
		0x77, 0xaa, 0xcd, 0x95, 0x72, 0xbc, 0x9e, 0xdf,
		0x58, 0x5d, 0x4b, 0x97, 0xae, 0x92, 0x17, 0xb9,
		0x44, 0xd0, 0x80, 0xc8, 0xfa, 0x3e, 0xbf, 0xb3,
		0xdc, 0x54, 0xcb, 0x07, 0x75, 0x6e, 0xa3, 0xb6,
		0x76, 0x59, 0x92, 0x93, 0xa9, 0xdc, 0x51, 0x50,
		0x99, 0x6b, 0xcc, 0x35, 0xe6, 0x1a, 0xff, 0x57,
		0x23, 0x08, 0x42, 0xcb, 0xe9, 0x1b, 0xd6, 0x78,
		0xc2, 0xec, 0xfe, 0xfc, 0x7a, 0xfb, 0x7d, 0x78,
		0xd3, 0x84, 0xdf, 0xd4, 0xf2, 0xa4, 0xfb, 0x08,
		0x06, 0x00, 0x00,
	}

	type BitTestStruct struct {
		NCT struct {
			Egg struct {
				Name  string  `nbt:"name"`
				Value float32 `nbt:"value"`
			} `nbt:"egg"`
			Ham struct {
				Name  string  `nbt:"name"`
				Value float32 `nbt:"value"`
			} `nbt:"ham"`
		} `nbt:"nested compound test"`
		IntTest    int     `nbt:"intTest"`
		ByteTest   byte    `nbt:"byteTest"`
		StringTest string  `nbt:"stringTest"`
		ListTest   []int64 `nbt:"listTest (long)"`
		DoubleTest float64 `nbt:"doubleTest"`
		LongTest   int64   `nbt:"longTest"`
		ListTest2  [2]struct {
			CreatedOn int64  `nbt:"created-on"`
			Name      string `nbt:"name"`
		} `nbt:"listTest (compound)"`
		ByteArrayTest []byte `nbt:"byteArrayTest (the first 1000 values of (n*n*255+n*7)%100, starting with n=0 (0, 62, 34, 16, 8, ...))"`
		ShortTest     int16  `nbt:"shortTest"`
	}

	//test parse
	var value BitTestStruct
	r, err := gzip.NewReader(bytes.NewReader(data))
	if err != nil {
		t.Fatal(err)
	}
	if err := NewDecoder(r).Decode(&value); err != nil {
		t.Fatal(err)
	}

	var want BitTestStruct
	want.NCT.Egg.Name = "Eggbert"
	want.NCT.Egg.Value = 0.5
	want.NCT.Ham.Name = "Hampus"
	want.NCT.Ham.Value = 0.75
	want.IntTest = 2147483647
	want.ByteTest = 127
	want.StringTest = "HELLO WORLD THIS IS A TEST STRING \xc3\x85\xc3\x84\xc3\x96!"
	want.ListTest = []int64{11, 12, 13, 14, 15}
	want.DoubleTest = 0.49312871321823148
	want.LongTest = 9223372036854775807
	want.ListTest2[0].CreatedOn = 1264099775885
	want.ListTest2[0].Name = "Compound tag #0"
	want.ListTest2[1].CreatedOn = 1264099775885
	want.ListTest2[1].Name = "Compound tag #1"
	want.ByteArrayTest = make([]byte, 1000)
	for n := 0; n < 1000; n++ {
		want.ByteArrayTest[n] = byte((n*n*255 + n*7) % 100)
	}
	want.ShortTest = 32767

	if !reflect.DeepEqual(value, want) {
		t.Errorf("parse fail, expect %v, get %v", want, value)
	}

	//test skip
	var empty struct{}
	r, err = gzip.NewReader(bytes.NewReader(data))
	if err != nil {
		t.Fatal(err)
	}
	if err := NewDecoder(r).Decode(&empty); err != nil {
		t.Fatal(err)
	}

	//test unmarshal to interface{}
	var inf interface{}
	r, err = gzip.NewReader(bytes.NewReader(data))
	if err != nil {
		t.Fatal(err)
	}
	if err := NewDecoder(r).Decode(&inf); err != nil {
		t.Fatal(err)
	}
	// t.Log(inf)
}

func TestUnmarshal_IntArray(t *testing.T) {
	data := []byte{
		TagIntArray, 0, 0,
		0, 0, 0, 3,

		0, 0, 0, 1,
		0, 0, 0, 2,
		0, 0, 0, 3,
	}
	var (
		value []int
		want  = []int{1, 2, 3}

		value2 []int32
		want2  = []int32{1, 2, 3}
	)

	if err := Unmarshal(data, &value); err != nil {
		t.Fatal(err)
	}
	if !reflect.DeepEqual(value, want) {
		t.Errorf("parse fail, expect %v, get %v", want, value)
	}

	if err := Unmarshal(data, &value2); err != nil {
		t.Fatal(err)
	}
	if !reflect.DeepEqual(value2, want2) {
		t.Errorf("parse fail, expect %v, get %v", want2, value2)
	}

	// t.Log(value, value2)
}

func TestUnmarshal_LongArray(t *testing.T) {
	data := []byte{
		TagLongArray, 0, 0,
		0, 0, 0, 3,

		0, 0, 0, 0, 0, 0, 0, 1,
		0, 0, 0, 0, 0, 0, 0, 2,
		0, 0, 0, 0, 0, 0, 0, 3,
	}
	var (
		value    []int64
		infValue interface{}
		want     = []int64{1, 2, 3}
	)

	if err := Unmarshal(data, &value); err != nil {
		t.Fatal(err)
	}
	if !reflect.DeepEqual(value, want) {
		t.Errorf("parse fail, expect %v, get %v", want, value)
	}
	// t.Log(value)

	if err := Unmarshal(data, &infValue); err != nil {
		t.Fatal(err)
	}
	if !reflect.DeepEqual(infValue, want) {
		t.Errorf("parse fail, expect %v, get %v", want, infValue)
	}
	// t.Log(infValue)
}
func TestUnmarshal_ByteArray(t *testing.T) {
	data := []byte{
		TagByteArray, 0, 0,
		0, 0, 0, 7,
		0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
	}
	var (
		value    []byte
		infValue interface{}
		want     = []byte{0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07}
	)

	//Unmarshal to []byte
	if err := Unmarshal(data, &value); err != nil {
		t.Fatal(err)
	}
	if !reflect.DeepEqual(value, want) {
		t.Errorf("parse fail, expect %v, get %v", want, value)
	}
	// t.Log(value)

	//Unmarshal to interface{}
	if err := Unmarshal(data, &infValue); err != nil {
		t.Fatal(err)
	}
	if !reflect.DeepEqual(infValue, want) {
		t.Errorf("parse fail, expect %v, get %v", want, value)
	}
	// t.Log(infValue)
}