#!/usr/bin/env elixir

# Simple test script for BusinessLogic placeholder implementation
# This script tests the basic module structure without complex dependencies

IO.puts("Testing BusinessLogic module structure...")

# Create a minimal test that doesn't require ISOMsg
defmodule BusinessLogicStructureTest do
  def test_module_structure do
    IO.puts("\n=== BusinessLogic Module Structure Test ===")
    
    try do
      # Read the file content to verify it exists and basic structure
      file_path = "lib/da_product_app/mercury_iso8583/processors/business_logic.ex"
      
      if File.exists?(file_path) do
        content = File.read!(file_path)
        
        IO.puts("✓ BusinessLogic file exists at #{file_path}")
        
        # Check for key module declaration
        if String.contains?(content, "defmodule DaProductApp.MercuryISO8583.Processors.BusinessLogic") do
          IO.puts("✓ Module declaration found")
        else
          IO.puts("❌ Module declaration missing")
        end
        
        # Check for main function
        if String.contains?(content, "def process_message(") do
          IO.puts("✓ Main process_message function found")
        else
          IO.puts("❌ process_message function missing")
        end
        
        # Check for configuration functions
        if String.contains?(content, "def get_transaction_limits") do
          IO.puts("✓ get_transaction_limits function found")
        else
          IO.puts("❌ get_transaction_limits function missing")
        end
        
        if String.contains?(content, "def get_response_codes") do
          IO.puts("✓ get_response_codes function found")
        else
          IO.puts("❌ get_response_codes function missing")
        end
        
        # Check for business logic functions
        business_functions = [
          "analyze_message_type",
          "validate_business_rules", 
          "assess_risk",
          "authorize_transaction",
          "generate_business_response"
        ]
        
        IO.puts("\n=== Business Logic Functions ===")
        Enum.each(business_functions, fn func ->
          if String.contains?(content, "def #{func}(") do
            IO.puts("✓ #{func} function found")
          else
            IO.puts("❌ #{func} function missing")
          end
        end)
        
        # Count lines for complexity estimation
        line_count = content |> String.split("\n") |> length()
        IO.puts("\n📊 File Statistics:")
        IO.puts("   - Total lines: #{line_count}")
        IO.puts("   - File size: #{byte_size(content)} bytes")
        
        IO.puts("\n✅ BusinessLogic module structure test completed!")
        
        IO.puts("\n📝 Implementation Status:")
        IO.puts("   ✓ Module structure created")
        IO.puts("   ✓ Function signatures defined")
        IO.puts("   ✓ Placeholder implementations added")
        IO.puts("   ✓ Configuration constants defined")
        IO.puts("   ✓ Documentation and TODOs added")
        
        IO.puts("\n🚀 Next Steps for Developers:")
        IO.puts("   1. Implement real authorization logic")
        IO.puts("   2. Add risk assessment algorithms")
        IO.puts("   3. Create business rule validation")
        IO.puts("   4. Integrate with external card networks")
        IO.puts("   5. Add fraud detection mechanisms")
        IO.puts("   6. Implement transaction routing")
        IO.puts("   7. Add proper error handling")
        IO.puts("   8. Create configuration management")
        IO.puts("   9. Add logging and monitoring")
        IO.puts("  10. Write unit tests for all functions")
        
      else
        IO.puts("❌ BusinessLogic file not found at #{file_path}")
        System.halt(1)
      end
      
    rescue
      error ->
        IO.puts("❌ Error testing BusinessLogic module: #{inspect(error)}")
        System.halt(1)
    end
  end
end

BusinessLogicStructureTest.test_module_structure()