package test

import (
	"fmt"
	"strings"
	"testing"

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

	"github.com/fraktal/mev-beta/internal/validation"
)

// TestValidationFixForKnownAddresses tests the validation fixes against the specific addresses causing errors in production
func TestValidationFixForKnownAddresses(t *testing.T) {
	validator := validation.NewAddressValidator()

	// Test the specific addresses that were causing "Error getting pool data" logs
	testCases := []struct {
		name             string
		address          string
		expectERC20      bool
		expectValidPool  bool
		expectValidation bool
		description      string
	}{
		{
			name:             "WETH - should be recognized as ERC-20",
			address:          "0x82aF49447D8a07e3bd95BD0d56f35241523fBab1",
			expectERC20:      true,
			expectValidPool:  false,
			expectValidation: true,
			description:      "WETH was being treated as a pool causing slot0 errors",
		},
		{
			name:             "USDC - should be recognized as ERC-20",
			address:          "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
			expectERC20:      true,
			expectValidPool:  false,
			expectValidation: true,
			description:      "USDC was being treated as a pool causing execution reverts",
		},
		{
			name:             "USDT - should be recognized as ERC-20",
			address:          "0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9",
			expectERC20:      true,
			expectValidPool:  false,
			expectValidation: true,
			description:      "USDT was being treated as a pool causing execution reverts",
		},
		{
			name:             "ARB Token - should be recognized as ERC-20",
			address:          "0x912CE59144191C1204E64559FE8253a0e49E6548",
			expectERC20:      true,
			expectValidPool:  false,
			expectValidation: true,
			description:      "ARB token was being treated as a pool",
		},
		{
			name:             "Zero address - should be rejected",
			address:          "0x0000000000000000000000000000000000000000",
			expectERC20:      false,
			expectValidPool:  false,
			expectValidation: false,
			description:      "Zero address corruption causing massive log spam",
		},
		{
			name:             "Corrupted address pattern 1",
			address:          "0x0000000000000000000000000000001202a5e794",
			expectERC20:      false,
			expectValidPool:  false,
			expectValidation: false,
			description:      "Leading zeros corruption pattern",
		},
		{
			name:             "Corrupted address pattern 2",
			address:          "0x00000003000000000000000000000000003528C0",
			expectERC20:      false,
			expectValidPool:  false,
			expectValidation: false,
			description:      "Mixed zero corruption pattern",
		},
	}

	fmt.Println("🧪 Testing Validation Fixes for Production Error Addresses")
	fmt.Println(strings.Repeat("=", 80))

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			addr := common.HexToAddress(tc.address)

			// Test basic validation
			result := validator.ValidateAddress(tc.address)

			// Test pool operation validation
			poolOpErr := validator.ValidatePoolOperation(addr, "slot0")

			// Test detailed analysis
			analysis := validator.GetDetailedAddressAnalysis(addr)

			fmt.Printf("\n🔍 Testing: %s\n", tc.name)
			fmt.Printf("   Address: %s\n", tc.address)
			fmt.Printf("   Description: %s\n", tc.description)
			fmt.Printf("   Valid: %v (Expected: %v)\n", result.IsValid, tc.expectValidation)
			fmt.Printf("   Corruption Score: %d\n", result.CorruptionScore)
			fmt.Printf("   Contract Type: %s\n", result.ContractType.String())

			if isERC20, ok := analysis["is_known_erc20"].(bool); ok {
				fmt.Printf("   Known ERC-20: %v (Expected: %v)\n", isERC20, tc.expectERC20)
				if isERC20 != tc.expectERC20 {
					t.Errorf("ERC-20 recognition failed: expected %v, got %v", tc.expectERC20, isERC20)
				}
			}

			if tokenName, ok := analysis["token_name"].(string); ok && tc.expectERC20 {
				fmt.Printf("   Token Name: %s\n", tokenName)
			}

			// Test pool operation validation
			if tc.expectERC20 {
				if poolOpErr == nil {
					t.Errorf("Expected pool operation to be rejected for ERC-20 token %s", tc.address)
					fmt.Printf("   ❌ Pool Operation: Should have been rejected but was allowed\n")
				} else {
					fmt.Printf("   ✅ Pool Operation: Correctly rejected - %s\n", poolOpErr.Error())
				}
			} else if tc.expectValidation {
				if poolOpErr != nil {
					fmt.Printf("   ℹ️  Pool Operation: Rejected - %s\n", poolOpErr.Error())
				} else {
					fmt.Printf("   ✅ Pool Operation: Allowed for valid pool\n")
				}
			} else {
				if poolOpErr != nil {
					fmt.Printf("   ✅ Pool Operation: Correctly rejected for invalid address\n")
				} else {
					t.Errorf("Expected pool operation to be rejected for invalid address %s", tc.address)
				}
			}

			// Verify corruption pattern detection
			if corruptionPattern, ok := analysis["corruption_pattern"].(string); ok {
				fmt.Printf("   Corruption Pattern: %s\n", corruptionPattern)
			}

			// Verify basic validation expectation
			if result.IsValid != tc.expectValidation {
				t.Errorf("Validation result mismatch for %s: expected %v, got %v",
					tc.address, tc.expectValidation, result.IsValid)
			}
		})
	}

	fmt.Println("\n" + strings.Repeat("=", 80))
	fmt.Println("🎯 Validation Fix Test Summary:")
	fmt.Println("   - Major ERC-20 tokens (WETH, USDC, USDT, ARB) should be recognized")
	fmt.Println("   - Pool operations on ERC-20 tokens should be prevented")
	fmt.Println("   - Corrupted addresses should be properly detected and rejected")
	fmt.Println("   - This should eliminate the 535K+ log spam from production")
}

// TestCorruptionSourceAnalysis tests the system's ability to identify corruption sources
func TestCorruptionSourceAnalysis(t *testing.T) {
	validator := validation.NewAddressValidator()

	// Test various corruption patterns found in the logs
	corruptionCases := []struct {
		corrupted   string
		pattern     string
		description string
	}{
		{
			corrupted:   "0x0000000000000000000000000000000000000000",
			pattern:     "ZERO_ADDRESS",
			description: "Complete zero address - most common corruption (6,895 occurrences)",
		},
		{
			corrupted:   "0x0000000000000000000000000000001202a5e794",
			pattern:     "LEADING_ZEROS_CORRUPTION",
			description: "Leading zeros with trailing data - ABI decoding issue",
		},
		{
			corrupted:   "0x82af49447d8a07e3bd95bd0d56f35241523fbab1weth",
			pattern:     "EMBEDDED_WETH_PATTERN",
			description: "WETH address with embedded corruption",
		},
	}

	fmt.Println("\n🔍 Testing Corruption Pattern Detection")
	fmt.Println(strings.Repeat("=", 60))

	for _, tc := range corruptionCases {
		t.Run(tc.pattern, func(t *testing.T) {
			// Note: This would require modifying the test to handle invalid hex
			// For now, test with valid hex patterns
			if len(tc.corrupted) == 42 && tc.corrupted[:2] == "0x" {
				addr := common.HexToAddress(tc.corrupted)
				analysis := validator.GetDetailedAddressAnalysis(addr)

				fmt.Printf("\n   Pattern: %s\n", tc.pattern)
				fmt.Printf("   Address: %s\n", tc.corrupted)
				fmt.Printf("   Description: %s\n", tc.description)

				if detectedPattern, ok := analysis["corruption_pattern"].(string); ok {
					fmt.Printf("   Detected: %s\n", detectedPattern)
					if detectedPattern == tc.pattern {
						fmt.Printf("   ✅ Correctly identified\n")
					} else {
						fmt.Printf("   ⚠️  Different pattern detected\n")
					}
				}

				if corruptionScore, ok := analysis["corruption_score"].(int); ok {
					fmt.Printf("   Corruption Score: %d\n", corruptionScore)
				}
			}
		})
	}
}