package parsers

import (
	"context"
	"math/big"

	"github.com/ethereum/go-ethereum/common"

	"coppertone.tech/fraktal/mev-bot/pkg/observability"
)

// mockLogger implements a simple logger for testing
type mockLogger struct{}

func (m *mockLogger) Debug(msg string, args ...any)                        {}
func (m *mockLogger) Info(msg string, args ...any)                         {}
func (m *mockLogger) Warn(msg string, args ...any)                         {}
func (m *mockLogger) Error(msg string, args ...any)                        {}
func (m *mockLogger) With(args ...any) observability.Logger                { return m }
func (m *mockLogger) WithContext(ctx context.Context) observability.Logger { return m }

// encodeSwapData encodes UniswapV2 swap data in ABI format for testing
func encodeSwapData(amount0In, amount1In, amount0Out, amount1Out *big.Int) []byte {
	// Each uint256 is 32 bytes
	data := make([]byte, 128) // 4 * 32 bytes

	// amount0In
	copy(data[0:32], common.LeftPadBytes(amount0In.Bytes(), 32))
	// amount1In
	copy(data[32:64], common.LeftPadBytes(amount1In.Bytes(), 32))
	// amount0Out
	copy(data[64:96], common.LeftPadBytes(amount0Out.Bytes(), 32))
	// amount1Out
	copy(data[96:128], common.LeftPadBytes(amount1Out.Bytes(), 32))

	return data
}