package indexer_test

import (
	"math/big"
	"testing"

	"github.com/cosmos/cosmos-sdk/client"
	"github.com/cosmos/cosmos-sdk/simapp/params"
	"github.com/ethereum/go-ethereum/common"
	ethtypes "github.com/ethereum/go-ethereum/core/types"
	"github.com/evmos/ethermint/app"
	"github.com/evmos/ethermint/crypto/ethsecp256k1"
	evmenc "github.com/evmos/ethermint/encoding"
	"github.com/evmos/ethermint/indexer"
	"github.com/evmos/ethermint/tests"
	"github.com/evmos/ethermint/x/evm/types"
	"github.com/stretchr/testify/require"
	abci "github.com/tendermint/tendermint/abci/types"
	tmlog "github.com/tendermint/tendermint/libs/log"
	tmtypes "github.com/tendermint/tendermint/types"
	dbm "github.com/tendermint/tm-db"
)

func TestKVIndexer(t *testing.T) {
	priv, err := ethsecp256k1.GenerateKey()
	require.NoError(t, err)
	from := common.BytesToAddress(priv.PubKey().Address().Bytes())
	signer := tests.NewSigner(priv)
	ethSigner := ethtypes.LatestSignerForChainID(nil)

	to := common.BigToAddress(big.NewInt(1))
	tx := types.NewTx(
		nil, 0, &to, big.NewInt(1000), 21000, nil, nil, nil, nil, nil,
	)
	tx.From = from.Hex()
	require.NoError(t, tx.Sign(ethSigner, signer))
	txHash := tx.AsTransaction().Hash()

	encodingConfig := MakeEncodingConfig()
	clientCtx := client.Context{}.WithTxConfig(encodingConfig.TxConfig).WithCodec(encodingConfig.Codec)

	// build cosmos-sdk wrapper tx
	tmTx, err := tx.BuildTx(clientCtx.TxConfig.NewTxBuilder(), "aphoton")
	require.NoError(t, err)
	txBz, err := clientCtx.TxConfig.TxEncoder()(tmTx)
	require.NoError(t, err)

	// build an invalid wrapper tx
	builder := clientCtx.TxConfig.NewTxBuilder()
	require.NoError(t, builder.SetMsgs(tx))
	tmTx2 := builder.GetTx()
	txBz2, err := clientCtx.TxConfig.TxEncoder()(tmTx2)
	require.NoError(t, err)

	testCases := []struct {
		name        string
		block       *tmtypes.Block
		blockResult []*abci.ResponseDeliverTx
		expSuccess  bool
	}{
		{
			"success, format 1",
			&tmtypes.Block{Header: tmtypes.Header{Height: 1}, Data: tmtypes.Data{Txs: []tmtypes.Tx{txBz}}},
			[]*abci.ResponseDeliverTx{
				{
					Code: 0,
					Events: []abci.Event{
						{Type: types.EventTypeEthereumTx, Attributes: []abci.EventAttribute{
							{Key: []byte("ethereumTxHash"), Value: []byte(txHash.Hex())},
							{Key: []byte("txIndex"), Value: []byte("0")},
							{Key: []byte("amount"), Value: []byte("1000")},
							{Key: []byte("txGasUsed"), Value: []byte("21000")},
							{Key: []byte("txHash"), Value: []byte("")},
							{Key: []byte("recipient"), Value: []byte("0x775b87ef5D82ca211811C1a02CE0fE0CA3a455d7")},
						}},
					},
				},
			},
			true,
		},
		{
			"success, format 2",
			&tmtypes.Block{Header: tmtypes.Header{Height: 1}, Data: tmtypes.Data{Txs: []tmtypes.Tx{txBz}}},
			[]*abci.ResponseDeliverTx{
				{
					Code: 0,
					Events: []abci.Event{
						{Type: types.EventTypeEthereumTx, Attributes: []abci.EventAttribute{
							{Key: []byte("ethereumTxHash"), Value: []byte(txHash.Hex())},
							{Key: []byte("txIndex"), Value: []byte("0")},
						}},
						{Type: types.EventTypeEthereumTx, Attributes: []abci.EventAttribute{
							{Key: []byte("amount"), Value: []byte("1000")},
							{Key: []byte("txGasUsed"), Value: []byte("21000")},
							{Key: []byte("txHash"), Value: []byte("14A84ED06282645EFBF080E0B7ED80D8D8D6A36337668A12B5F229F81CDD3F57")},
							{Key: []byte("recipient"), Value: []byte("0x775b87ef5D82ca211811C1a02CE0fE0CA3a455d7")},
						}},
					},
				},
			},
			true,
		},
		{
			"success, exceed block gas limit",
			&tmtypes.Block{Header: tmtypes.Header{Height: 1}, Data: tmtypes.Data{Txs: []tmtypes.Tx{txBz}}},
			[]*abci.ResponseDeliverTx{
				{
					Code:   11,
					Log:    "out of gas in location: block gas meter; gasWanted: 21000",
					Events: []abci.Event{},
				},
			},
			true,
		},
		{
			"fail, failed eth tx",
			&tmtypes.Block{Header: tmtypes.Header{Height: 1}, Data: tmtypes.Data{Txs: []tmtypes.Tx{txBz}}},
			[]*abci.ResponseDeliverTx{
				{
					Code:   15,
					Log:    "nonce mismatch",
					Events: []abci.Event{},
				},
			},
			false,
		},
		{
			"fail, invalid events",
			&tmtypes.Block{Header: tmtypes.Header{Height: 1}, Data: tmtypes.Data{Txs: []tmtypes.Tx{txBz}}},
			[]*abci.ResponseDeliverTx{
				{
					Code:   0,
					Events: []abci.Event{},
				},
			},
			false,
		},
		{
			"fail, not eth tx",
			&tmtypes.Block{Header: tmtypes.Header{Height: 1}, Data: tmtypes.Data{Txs: []tmtypes.Tx{txBz2}}},
			[]*abci.ResponseDeliverTx{
				{
					Code:   0,
					Events: []abci.Event{},
				},
			},
			false,
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			db := dbm.NewMemDB()
			idxer := indexer.NewKVIndexer(db, tmlog.NewNopLogger(), clientCtx)

			err = idxer.IndexBlock(tc.block, tc.blockResult)
			require.NoError(t, err)
			if !tc.expSuccess {
				first, err := idxer.FirstIndexedBlock()
				require.NoError(t, err)
				require.Equal(t, int64(-1), first)

				last, err := idxer.LastIndexedBlock()
				require.NoError(t, err)
				require.Equal(t, int64(-1), last)
			} else {
				first, err := idxer.FirstIndexedBlock()
				require.NoError(t, err)
				require.Equal(t, tc.block.Header.Height, first)

				last, err := idxer.LastIndexedBlock()
				require.NoError(t, err)
				require.Equal(t, tc.block.Header.Height, last)

				res1, err := idxer.GetByTxHash(txHash)
				require.NoError(t, err)
				require.NotNil(t, res1)
				res2, err := idxer.GetByBlockAndIndex(1, 0)
				require.NoError(t, err)
				require.Equal(t, res1, res2)
			}
		})
	}
}

// MakeEncodingConfig creates the EncodingConfig
func MakeEncodingConfig() params.EncodingConfig {
	return evmenc.MakeConfig(app.ModuleBasics)
}