//go:build integration && legacy && forked
// +build integration,legacy,forked

package test_main

import (
	"context"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"math/big"
	"path/filepath"
	"runtime"
	"strings"
	"testing"
	"time"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/core/types"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"github.com/fraktal/mev-beta/internal/logger"
	"github.com/fraktal/mev-beta/pkg/arbitrum"
	"github.com/fraktal/mev-beta/pkg/events"
	"github.com/fraktal/mev-beta/pkg/oracle"
)

// TestFixtures represents the structure of our test data
type TestFixtures struct {
	HighValueSwaps     []TransactionFixture `json:"high_value_swaps"`
	ComplexMultiHop    []TransactionFixture `json:"complex_multi_hop"`
	FailedTransactions []TransactionFixture `json:"failed_transactions"`
	EdgeCases          []TransactionFixture `json:"edge_cases"`
	MEVTransactions    []TransactionFixture `json:"mev_transactions"`
	ProtocolSpecific   ProtocolFixtures     `json:"protocol_specific"`
	GasOptimization    []TransactionFixture `json:"gas_optimization_tests"`
}

type TransactionFixture struct {
	Name                   string                 `json:"name"`
	Description            string                 `json:"description"`
	TxHash                 string                 `json:"tx_hash"`
	BlockNumber            uint64                 `json:"block_number"`
	Protocol               string                 `json:"protocol"`
	FunctionSignature      string                 `json:"function_signature"`
	FunctionName           string                 `json:"function_name"`
	Router                 string                 `json:"router"`
	Pool                   string                 `json:"pool"`
	TokenIn                string                 `json:"token_in"`
	TokenOut               string                 `json:"token_out"`
	AmountIn               string                 `json:"amount_in"`
	AmountOutMinimum       string                 `json:"amount_out_minimum"`
	Fee                    uint32                 `json:"fee"`
	GasUsed                uint64                 `json:"gas_used"`
	GasPrice               string                 `json:"gas_price"`
	Status                 uint64                 `json:"status"`
	RevertReason           string                 `json:"revert_reason"`
	ShouldParse            *bool                  `json:"should_parse,omitempty"`
	ShouldValidate         *bool                  `json:"should_validate,omitempty"`
	ShouldHandleOverflow   bool                   `json:"should_handle_overflow"`
	ShouldResolveSymbols   *bool                  `json:"should_resolve_symbols,omitempty"`
	Path                   []string               `json:"path"`
	PathEncoded            string                 `json:"path_encoded"`
	ExpectedHops           int                    `json:"expected_hops"`
	ComplexRouting         bool                   `json:"complex_routing"`
	TotalAmountIn          string                 `json:"total_amount_in"`
	StableSwap             bool                   `json:"stable_swap"`
	TxIndex                uint64                 `json:"tx_index"`
	MEVType                string                 `json:"mev_type"`
	ExpectedVictimTx       string                 `json:"expected_victim_tx"`
	ExpectedProfitEstimate uint64                 `json:"expected_profit_estimate"`
	ExpectedProfit         uint64                 `json:"expected_profit"`
	ProtocolsUsed          []string               `json:"protocols_used"`
	TokenPair              string                 `json:"token_pair"`
	ProfitToken            string                 `json:"profit_token"`
	EstimatedProfit        uint64                 `json:"estimated_profit"`
	GasCost                uint64                 `json:"gas_cost"`
	NetProfit              uint64                 `json:"net_profit"`
	LiquidatedUser         string                 `json:"liquidated_user"`
	CollateralToken        string                 `json:"collateral_token"`
	DebtToken              string                 `json:"debt_token"`
	LiquidationBonus       uint64                 `json:"liquidation_bonus"`
	SubCalls               int                    `json:"sub_calls"`
	TotalGasUsed           uint64                 `json:"total_gas_used"`
	GasPerCallAvg          uint64                 `json:"gas_per_call_avg"`
	ExpectedGasSavings     uint64                 `json:"expected_gas_savings"`
	AlternativeRoutesCount int                    `json:"alternative_routes_count"`
	ExpectedEvents         []ExpectedEvent        `json:"expected_events"`
	CustomData             map[string]interface{} `json:"custom_data,omitempty"`
}

type ExpectedEvent struct {
	Type         string `json:"type"`
	Pool         string `json:"pool"`
	Amount0      string `json:"amount0"`
	Amount1      string `json:"amount1"`
	SqrtPriceX96 string `json:"sqrt_price_x96"`
	Liquidity    string `json:"liquidity"`
	Tick         int    `json:"tick"`
}

type ProtocolFixtures struct {
	CurveStableSwaps   []TransactionFixture `json:"curve_stable_swaps"`
	BalancerBatchSwaps []TransactionFixture `json:"balancer_batch_swaps"`
	GMXPerpetuals      []TransactionFixture `json:"gmx_perpetuals"`
}

// ParserTestSuite contains all parser validation tests
type ParserTestSuite struct {
	fixtures    *TestFixtures
	l2Parser    *arbitrum.ArbitrumL2Parser
	eventParser *events.EventParser
	logger      *logger.Logger
	oracle      *oracle.PriceOracle
}

func setupParserTestSuite(t *testing.T) *ParserTestSuite {
	// Load test fixtures
	_, currentFile, _, _ := runtime.Caller(0)
	fixturesPath := filepath.Join(filepath.Dir(currentFile), "fixtures", "real_arbitrum_transactions.json")

	fixturesData, err := ioutil.ReadFile(fixturesPath)
	require.NoError(t, err, "Failed to read test fixtures")

	var fixtures TestFixtures
	err = json.Unmarshal(fixturesData, &fixtures)
	require.NoError(t, err, "Failed to parse test fixtures")

	// Setup logger
	testLogger := logger.NewLogger(logger.Config{
		Level:  "debug",
		Format: "json",
	})

	// Setup oracle (mock for tests)
	testOracle, err := oracle.NewPriceOracle(&oracle.Config{
		Providers: []oracle.Provider{
			{
				Name: "mock",
				Type: "mock",
			},
		},
	}, testLogger)
	require.NoError(t, err, "Failed to create price oracle")

	// Setup parsers
	l2Parser, err := arbitrum.NewArbitrumL2Parser("https://mock-rpc", testLogger, testOracle)
	require.NoError(t, err, "Failed to create L2 parser")

	eventParser := events.NewEventParser()

	return &ParserTestSuite{
		fixtures:    &fixtures,
		l2Parser:    l2Parser,
		eventParser: eventParser,
		logger:      testLogger,
		oracle:      testOracle,
	}
}

func TestComprehensiveParserValidation(t *testing.T) {
	suite := setupParserTestSuite(t)
	defer suite.l2Parser.Close()

	t.Run("HighValueSwaps", func(t *testing.T) {
		suite.testHighValueSwaps(t)
	})

	t.Run("ComplexMultiHop", func(t *testing.T) {
		suite.testComplexMultiHop(t)
	})

	t.Run("FailedTransactions", func(t *testing.T) {
		suite.testFailedTransactions(t)
	})

	t.Run("EdgeCases", func(t *testing.T) {
		suite.testEdgeCases(t)
	})

	t.Run("MEVTransactions", func(t *testing.T) {
		suite.testMEVTransactions(t)
	})

	t.Run("ProtocolSpecific", func(t *testing.T) {
		suite.testProtocolSpecific(t)
	})

	t.Run("GasOptimization", func(t *testing.T) {
		suite.testGasOptimization(t)
	})
}

func (suite *ParserTestSuite) testHighValueSwaps(t *testing.T) {
	for _, fixture := range suite.fixtures.HighValueSwaps {
		t.Run(fixture.Name, func(t *testing.T) {
			suite.validateTransactionParsing(t, fixture)

			// Validate high-value specific requirements
			if fixture.AmountIn != "" {
				amountIn, ok := new(big.Int).SetString(fixture.AmountIn, 10)
				require.True(t, ok, "Invalid amount_in in fixture")

				// Ensure high-value transactions have substantial amounts
				minHighValue := new(big.Int).Exp(big.NewInt(10), big.NewInt(21), nil) // 1000 ETH equivalent
				assert.True(t, amountIn.Cmp(minHighValue) >= 0,
					"High-value transaction should have amount >= 1000 ETH equivalent")
			}

			// Validate gas usage is reasonable for high-value transactions
			if fixture.GasUsed > 0 {
				assert.True(t, fixture.GasUsed >= 100000 && fixture.GasUsed <= 1000000,
					"High-value transaction gas usage should be reasonable (100k-1M gas)")
			}
		})
	}
}

func (suite *ParserTestSuite) testComplexMultiHop(t *testing.T) {
	for _, fixture := range suite.fixtures.ComplexMultiHop {
		t.Run(fixture.Name, func(t *testing.T) {
			suite.validateTransactionParsing(t, fixture)

			// Validate multi-hop specific requirements
			if fixture.ExpectedHops > 0 {
				// TODO: Implement path parsing validation
				assert.True(t, fixture.ExpectedHops >= 2,
					"Multi-hop transaction should have at least 2 hops")
			}

			if fixture.PathEncoded != "" {
				// Validate Uniswap V3 encoded path structure
				pathBytes := common.FromHex(fixture.PathEncoded)
				expectedLength := 20 + (fixture.ExpectedHops * 23) // token + (fee + token) per hop
				assert.True(t, len(pathBytes) >= expectedLength,
					"Encoded path length should match expected hop count")
			}
		})
	}
}

func (suite *ParserTestSuite) testFailedTransactions(t *testing.T) {
	for _, fixture := range suite.fixtures.FailedTransactions {
		t.Run(fixture.Name, func(t *testing.T) {
			// Failed transactions should have specific characteristics
			assert.Equal(t, uint64(0), fixture.Status, "Failed transaction should have status 0")
			assert.NotEmpty(t, fixture.RevertReason, "Failed transaction should have revert reason")

			// Should not parse successfully if should_parse is false
			if fixture.ShouldParse != nil && !*fixture.ShouldParse {
				// Validate that parser handles failed transactions gracefully
				tx := suite.createMockTransaction(fixture)

				// Parser should not crash on failed transactions
				assert.NotPanics(t, func() {
					_, err := suite.l2Parser.ParseDEXTransactions(context.Background(), &arbitrum.RawL2Block{
						Transactions: []arbitrum.RawL2Transaction{
							{
								Hash:  fixture.TxHash,
								From:  "0x1234567890123456789012345678901234567890",
								To:    fixture.Router,
								Input: suite.createMockTransactionData(fixture),
								Value: "0",
							},
						},
					})

					// Should handle error gracefully
					if err != nil {
						suite.logger.Debug(fmt.Sprintf("Expected error for failed transaction: %v", err))
					}
				})
			}
		})
	}
}

func (suite *ParserTestSuite) testEdgeCases(t *testing.T) {
	for _, fixture := range suite.fixtures.EdgeCases {
		t.Run(fixture.Name, func(t *testing.T) {
			switch fixture.Name {
			case "zero_value_transaction":
				// Zero value transactions should be handled appropriately
				if fixture.ShouldValidate != nil && !*fixture.ShouldValidate {
					amountIn, _ := new(big.Int).SetString(fixture.AmountIn, 10)
					assert.True(t, amountIn.Cmp(big.NewInt(0)) == 0, "Zero value transaction should have zero amount")
				}

			case "max_uint256_amount":
				// Test overflow protection
				if fixture.ShouldHandleOverflow {
					amountIn, ok := new(big.Int).SetString(fixture.AmountIn, 10)
					require.True(t, ok, "Should parse max uint256")

					maxUint256 := new(big.Int)
					maxUint256.SetString("115792089237316195423570985008687907853269984665640564039457584007913129639935", 10)
					assert.Equal(t, maxUint256.Cmp(amountIn), 0, "Should handle max uint256 correctly")
				}

			case "unknown_token_addresses":
				// Test unknown token handling
				if fixture.ShouldResolveSymbols != nil && !*fixture.ShouldResolveSymbols {
					// Parser should handle unknown tokens gracefully
					assert.True(t, common.IsHexAddress(fixture.TokenIn), "Token addresses should be valid hex")
					assert.True(t, common.IsHexAddress(fixture.TokenOut), "Token addresses should be valid hex")
				}
			}
		})
	}
}

func (suite *ParserTestSuite) testMEVTransactions(t *testing.T) {
	for _, fixture := range suite.fixtures.MEVTransactions {
		t.Run(fixture.Name, func(t *testing.T) {
			suite.validateTransactionParsing(t, fixture)

			// Validate MEV-specific patterns
			switch fixture.MEVType {
			case "sandwich_frontrun":
				assert.Greater(t, fixture.TxIndex, uint64(0),
					"Front-running transaction should have low transaction index")
				if fixture.ExpectedVictimTx != "" {
					assert.NotEqual(t, fixture.TxHash, fixture.ExpectedVictimTx,
						"Front-run and victim transactions should be different")
				}

			case "sandwich_backrun":
				assert.Greater(t, fixture.TxIndex, uint64(1),
					"Back-running transaction should have higher transaction index")
				if fixture.ExpectedProfit > 0 {
					assert.Greater(t, fixture.ExpectedProfit, uint64(0),
						"Back-run transaction should have positive expected profit")
				}

			case "arbitrage":
				if len(fixture.ProtocolsUsed) > 0 {
					assert.True(t, len(fixture.ProtocolsUsed) >= 2,
						"Arbitrage should use multiple protocols")
				}
				if fixture.NetProfit > 0 {
					assert.Greater(t, fixture.EstimatedProfit, fixture.GasCost,
						"Net profit should account for gas costs")
				}

			case "liquidation":
				assert.NotEmpty(t, fixture.LiquidatedUser, "Liquidation should specify user")
				assert.NotEmpty(t, fixture.CollateralToken, "Liquidation should specify collateral")
				assert.NotEmpty(t, fixture.DebtToken, "Liquidation should specify debt token")
				if fixture.LiquidationBonus > 0 {
					assert.Greater(t, fixture.LiquidationBonus, uint64(100000000000000000),
						"Liquidation bonus should be positive")
				}
			}
		})
	}
}

func (suite *ParserTestSuite) testProtocolSpecific(t *testing.T) {
	t.Run("CurveStableSwaps", func(t *testing.T) {
		for _, fixture := range suite.fixtures.ProtocolSpecific.CurveStableSwaps {
			suite.validateTransactionParsing(t, fixture)

			// Validate Curve-specific parameters
			assert.Equal(t, "0x3df02124", fixture.FunctionSignature,
				"Curve exchange should use correct function signature")
			assert.Equal(t, "exchange", fixture.FunctionName,
				"Curve swap should use exchange function")
		}
	})

	t.Run("BalancerBatchSwaps", func(t *testing.T) {
		for _, fixture := range suite.fixtures.ProtocolSpecific.BalancerBatchSwaps {
			suite.validateTransactionParsing(t, fixture)

			// Validate Balancer-specific parameters
			assert.Equal(t, "0x945bcec9", fixture.FunctionSignature,
				"Balancer batch swap should use correct function signature")
			assert.Equal(t, "batchSwap", fixture.FunctionName,
				"Balancer should use batchSwap function")
		}
	})

	t.Run("GMXPerpetuals", func(t *testing.T) {
		for _, fixture := range suite.fixtures.ProtocolSpecific.GMXPerpetuals {
			suite.validateTransactionParsing(t, fixture)

			// Validate GMX-specific parameters
			assert.Contains(t, fixture.Router, "0x327df1e6de05895d2ab08513aadd9317845f20d9",
				"GMX should use correct router address")
		}
	})
}

func (suite *ParserTestSuite) testGasOptimization(t *testing.T) {
	for _, fixture := range suite.fixtures.GasOptimization {
		t.Run(fixture.Name, func(t *testing.T) {
			suite.validateTransactionParsing(t, fixture)

			// Validate gas optimization patterns
			if fixture.Name == "multicall_transaction" {
				assert.Greater(t, fixture.SubCalls, 1, "Multicall should have multiple sub-calls")
				if fixture.TotalGasUsed > 0 && fixture.SubCalls > 0 {
					avgGasPerCall := fixture.TotalGasUsed / uint64(fixture.SubCalls)
					assert.InDelta(t, fixture.GasPerCallAvg, avgGasPerCall, 10000,
						"Average gas per call should match calculated value")
				}
			}

			if fixture.ExpectedGasSavings > 0 {
				assert.Greater(t, fixture.ExpectedGasSavings, uint64(10000),
					"Gas optimization should provide meaningful savings")
			}
		})
	}
}

func (suite *ParserTestSuite) validateTransactionParsing(t *testing.T, fixture TransactionFixture) {
	// Create mock transaction from fixture
	tx := suite.createMockTransaction(fixture)

	// Test transaction parsing
	assert.NotPanics(t, func() {
		// Test L2 message parsing if applicable
		if fixture.Protocol != "" && fixture.FunctionSignature != "" {
			// Create L2 message
			data := suite.createMockTransactionData(fixture)
			messageNumber := big.NewInt(int64(fixture.BlockNumber))
			timestamp := uint64(time.Now().Unix())

			_, err := suite.l2Parser.ParseDEXTransaction(arbitrum.RawL2Transaction{
				Hash:  fixture.TxHash,
				From:  "0x1234567890123456789012345678901234567890",
				To:    fixture.Router,
				Input: data,
				Value: "0",
			})

			if err != nil && fixture.ShouldParse != nil && *fixture.ShouldParse {
				t.Errorf("Expected successful parsing for %s, got error: %v", fixture.Name, err)
			}
		}

		// Test event parsing if applicable
		if len(fixture.ExpectedEvents) > 0 {
			for _, expectedEvent := range fixture.ExpectedEvents {
				suite.validateExpectedEvent(t, expectedEvent, fixture)
			}
		}
	})

	// Validate basic transaction properties
	if fixture.TxHash != "" {
		assert.True(t, strings.HasPrefix(fixture.TxHash, "0x"),
			"Transaction hash should start with 0x")
		assert.True(t, len(fixture.TxHash) == 42 || len(fixture.TxHash) == 66,
			"Transaction hash should be valid length")
	}

	if fixture.Router != "" {
		assert.True(t, common.IsHexAddress(fixture.Router),
			"Router address should be valid hex address")
	}

	if fixture.TokenIn != "" {
		assert.True(t, common.IsHexAddress(fixture.TokenIn),
			"TokenIn should be valid hex address")
	}

	if fixture.TokenOut != "" {
		assert.True(t, common.IsHexAddress(fixture.TokenOut),
			"TokenOut should be valid hex address")
	}
}

func (suite *ParserTestSuite) validateExpectedEvent(t *testing.T, expectedEvent ExpectedEvent, fixture TransactionFixture) {
	// Validate event structure
	assert.NotEmpty(t, expectedEvent.Type, "Event type should not be empty")

	if expectedEvent.Pool != "" {
		assert.True(t, common.IsHexAddress(expectedEvent.Pool),
			"Pool address should be valid hex address")
	}

	// Validate amounts
	if expectedEvent.Amount0 != "" {
		amount0, ok := new(big.Int).SetString(expectedEvent.Amount0, 10)
		assert.True(t, ok, "Amount0 should be valid big integer")
		assert.NotNil(t, amount0, "Amount0 should not be nil")
	}

	if expectedEvent.Amount1 != "" {
		amount1, ok := new(big.Int).SetString(expectedEvent.Amount1, 10)
		assert.True(t, ok, "Amount1 should be valid big integer")
		assert.NotNil(t, amount1, "Amount1 should not be nil")
	}

	// Validate Uniswap V3 specific fields
	if expectedEvent.SqrtPriceX96 != "" {
		sqrtPrice, ok := new(big.Int).SetString(expectedEvent.SqrtPriceX96, 10)
		assert.True(t, ok, "SqrtPriceX96 should be valid big integer")
		assert.True(t, sqrtPrice.Cmp(big.NewInt(0)) > 0, "SqrtPriceX96 should be positive")
	}

	if expectedEvent.Liquidity != "" {
		liquidity, ok := new(big.Int).SetString(expectedEvent.Liquidity, 10)
		assert.True(t, ok, "Liquidity should be valid big integer")
		assert.True(t, liquidity.Cmp(big.NewInt(0)) > 0, "Liquidity should be positive")
	}

	// Validate tick range for Uniswap V3
	if expectedEvent.Tick != 0 {
		assert.True(t, expectedEvent.Tick >= -887272 && expectedEvent.Tick <= 887272,
			"Tick should be within valid range for Uniswap V3")
	}
}

func (suite *ParserTestSuite) createMockTransaction(fixture TransactionFixture) *types.Transaction {
	// Create a mock transaction based on fixture data
	var to *common.Address
	if fixture.Router != "" {
		addr := common.HexToAddress(fixture.Router)
		to = &addr
	}

	var value *big.Int = big.NewInt(0)
	if fixture.AmountIn != "" {
		value, _ = new(big.Int).SetString(fixture.AmountIn, 10)
	}

	var gasPrice *big.Int = big.NewInt(1000000000) // 1 gwei default
	if fixture.GasPrice != "" {
		gasPrice, _ = new(big.Int).SetString(fixture.GasPrice, 10)
	}

	data := suite.createMockTransactionData(fixture)

	// Create transaction
	tx := types.NewTransaction(
		0,                    // nonce
		*to,                  // to
		value,                // value
		fixture.GasUsed,      // gasLimit
		gasPrice,             // gasPrice
		common.FromHex(data), // data
	)

	return tx
}

func (suite *ParserTestSuite) createMockTransactionData(fixture TransactionFixture) string {
	// Create mock transaction data based on function signature
	if fixture.FunctionSignature == "" {
		return "0x"
	}

	// Remove 0x prefix if present
	sig := strings.TrimPrefix(fixture.FunctionSignature, "0x")

	// Add padding for parameters based on function type
	switch fixture.FunctionName {
	case "exactInputSingle":
		// Mock ExactInputSingleParams struct (8 * 32 bytes = 256 bytes)
		padding := strings.Repeat("0", 512) // 256 bytes of padding
		return "0x" + sig + padding

	case "swapExactTokensForTokens":
		// Mock 5 parameters (5 * 32 bytes = 160 bytes)
		padding := strings.Repeat("0", 320) // 160 bytes of padding
		return "0x" + sig + padding

	case "multicall":
		// Mock multicall with variable data
		padding := strings.Repeat("0", 128) // Minimal padding
		return "0x" + sig + padding

	default:
		// Generic padding for unknown functions
		padding := strings.Repeat("0", 256) // 128 bytes of padding
		return "0x" + sig + padding
	}
}

// Benchmark tests for performance validation
func BenchmarkParserPerformance(b *testing.B) {
	suite := setupParserTestSuite(&testing.T{})
	defer suite.l2Parser.Close()

	// Test parsing performance with high-value swap
	fixture := suite.fixtures.HighValueSwaps[0]
	tx := suite.createMockTransaction(fixture)

	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		_, _ = suite.l2Parser.ParseDEXTransaction(arbitrum.RawL2Transaction{
			Hash:  fixture.TxHash,
			From:  "0x1234567890123456789012345678901234567890",
			To:    fixture.Router,
			Input: suite.createMockTransactionData(fixture),
			Value: "0",
		})
	}
}

func BenchmarkBatchParsing(b *testing.B) {
	suite := setupParserTestSuite(&testing.T{})
	defer suite.l2Parser.Close()

	// Create batch of transactions
	var rawTxs []arbitrum.RawL2Transaction
	for _, fixture := range suite.fixtures.HighValueSwaps {
		rawTxs = append(rawTxs, arbitrum.RawL2Transaction{
			Hash:  fixture.TxHash,
			From:  "0x1234567890123456789012345678901234567890",
			To:    fixture.Router,
			Input: suite.createMockTransactionData(fixture),
			Value: "0",
		})
	}

	block := &arbitrum.RawL2Block{
		Hash:         "0xblock123",
		Number:       "0x123456",
		Timestamp:    "0x60000000",
		Transactions: rawTxs,
	}

	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		_, _ = suite.l2Parser.ParseDEXTransactions(context.Background(), block)
	}
}

// Fuzz testing for robustness
func FuzzParserRobustness(f *testing.F) {
	suite := setupParserTestSuite(&testing.T{})
	defer suite.l2Parser.Close()

	// Seed with known good inputs
	f.Add("0x38ed1739", "UniswapV2", "1000000000000000000")
	f.Add("0x414bf389", "UniswapV3", "500000000000000000")
	f.Add("0xac9650d8", "Multicall", "0")

	f.Fuzz(func(t *testing.T, functionSig, protocol, amount string) {
		// Create fuzz test transaction
		rawTx := arbitrum.RawL2Transaction{
			Hash:  "0xfuzz12345678901234567890123456789012345",
			From:  "0x1234567890123456789012345678901234567890",
			To:    "0xE592427A0AEce92De3Edee1F18E0157C05861564",
			Input: functionSig + strings.Repeat("0", 256),
			Value: amount,
		}

		// Parser should not panic on any input
		assert.NotPanics(t, func() {
			_, _ = suite.l2Parser.ParseDEXTransaction(rawTx)
		})
	})
}

// Property-based testing for mathematical calculations
func TestPropertyBasedMathValidation(t *testing.T) {
	suite := setupParserTestSuite(t)
	defer suite.l2Parser.Close()

	t.Run("AmountConservation", func(t *testing.T) {
		// Test that amounts are correctly parsed and conserved
		for _, fixture := range suite.fixtures.HighValueSwaps {
			if fixture.AmountIn != "" && fixture.AmountOutMinimum != "" {
				amountIn, ok1 := new(big.Int).SetString(fixture.AmountIn, 10)
				amountOut, ok2 := new(big.Int).SetString(fixture.AmountOutMinimum, 10)

				if ok1 && ok2 {
					// Amounts should be positive
					assert.True(t, amountIn.Cmp(big.NewInt(0)) > 0, "AmountIn should be positive")
					assert.True(t, amountOut.Cmp(big.NewInt(0)) > 0, "AmountOut should be positive")

					// For non-exact-output swaps, amountOut should be less than amountIn (accounting for price)
					// This is a simplified check - real validation would need price data
				}
			}
		}
	})

	t.Run("OverflowProtection", func(t *testing.T) {
		// Test overflow protection with edge case amounts
		maxUint256 := new(big.Int)
		maxUint256.SetString("115792089237316195423570985008687907853269984665640564039457584007913129639935", 10)

		// Parser should handle max values without overflow
		assert.NotPanics(t, func() {
			rawTx := arbitrum.RawL2Transaction{
				Hash:  "0xoverflow123456789012345678901234567890",
				From:  "0x1234567890123456789012345678901234567890",
				To:    "0xE592427A0AEce92De3Edee1F18E0157C05861564",
				Input: "0x414bf389" + strings.Repeat("f", 512), // Max values
				Value: maxUint256.String(),
			}

			_, _ = suite.l2Parser.ParseDEXTransaction(rawTx)
		})
	})

	t.Run("PrecisionValidation", func(t *testing.T) {
		// Test that precision is maintained in calculations
		// This would test wei-level precision for token amounts
		testAmount := "123456789012345678" // 18 decimal precision

		amountBig, ok := new(big.Int).SetString(testAmount, 10)
		require.True(t, ok, "Should parse test amount")

		// Verify precision is maintained
		assert.Equal(t, testAmount, amountBig.String(), "Precision should be maintained")
	})
}

// Integration tests with live data (when available)
func TestLiveDataIntegration(t *testing.T) {
	if testing.Short() {
		t.Skip("Skipping live data integration tests in short mode")
	}

	// These tests would connect to live Arbitrum data
	// Only run when explicitly enabled
	t.Skip("Live data integration tests require RPC endpoint configuration")

	suite := setupParserTestSuite(t)
	defer suite.l2Parser.Close()

	// Test with real transaction hashes
	realTxHashes := []string{
		"0xc6962004f452be9203591991d15f6b388e09e8d0", // Known high-value swap
		"0x1b02da8cb0d097eb8d57a175b88c7d8b47997506", // Known SushiSwap transaction
	}

	for _, txHash := range realTxHashes {
		t.Run(fmt.Sprintf("RealTx_%s", txHash[:10]), func(t *testing.T) {
			// Would fetch and parse real transaction data
			// Validate against known expected values
		})
	}
}