package changeset

import (
	"bytes"
	"fmt"
	"github.com/ledgerwatch/turbo-geth/common"
	"github.com/stretchr/testify/assert"
	"reflect"
	"strconv"
	"testing"
)

func TestEncodingAccount(t *testing.T) {
	// empty StorageChangeSset first
	ch := NewAccountChangeSet()
	_, err := EncodeAccounts(ch)
	assert.NoError(t, err)

	vals := [][]byte{
		common.FromHex("f7f6db1eb17c6d582078e0ffdd0c"),
		common.FromHex("b1e9b5c16355eede662031dd621d08faf4ea"),
		common.FromHex("862cf52b74f1cea41ddd8ffa4b3e7c7790"),
	}
	numOfElements := 3
	for i := 0; i < numOfElements; i++ {
		addrHash, _ := common.HashData([]byte("addrHash" + strconv.Itoa(i)))
		err = ch.Add(addrHash.Bytes(), vals[i])
		if err != nil {
			t.Fatal(err)
		}
	}

	b, err := EncodeAccounts(ch)
	if err != nil {
		t.Fatal(err)
	}

	ch2, err := DecodeAccounts(b)
	if err != nil {
		t.Fatal(err)
	}

	if !reflect.DeepEqual(ch, ch2) {
		fmt.Println("ch", len(ch.Changes), "ch2", len(ch2.Changes))
		for i, v := range ch.Changes {
			fmt.Println("Line ", i)

			if !bytes.Equal(v.Key, ch2.Changes[i].Key) || !bytes.Equal(v.Value, ch2.Changes[i].Value) {
				fmt.Println("Diff ", i)
				fmt.Println("k1", common.Bytes2Hex(v.Key), len(v.Key))
				fmt.Println("k2", common.Bytes2Hex(ch2.Changes[i].Key))
				fmt.Println("v1", common.Bytes2Hex(v.Value))
				fmt.Println("v2", common.Bytes2Hex(ch2.Changes[i].Value))
			}
		}
		t.Fatal("not equal")
	}

	csBytes := AccountChangeSetBytes(b)
	i := 0
	err = csBytes.Walk(func(k, v []byte) error {
		if !bytes.Equal(k, ch2.Changes[i].Key) || !bytes.Equal(v, ch2.Changes[i].Value) {
			fmt.Println("Diff ", i)
			fmt.Println("k1", common.Bytes2Hex(k), len(k))
			fmt.Println("k2", common.Bytes2Hex(ch2.Changes[i].Key))
			fmt.Println("v1", common.Bytes2Hex(v))
			fmt.Println("v2", common.Bytes2Hex(ch2.Changes[i].Value))
			t.Fatal("not equal line")
		}
		i++
		return nil
	})
	if err != nil {
		t.Fatal(err)
	}

	for _, v := range ch.Changes {
		val, err := csBytes.FindLast(v.Key)
		if err != nil {
			t.Fatal(err)
		}
		if !bytes.Equal(v.Value, val) {
			t.Fatal("not equal")
		}
	}
}