#!/usr/bin/env elixir

Mix.install([])

defmodule HeaderConfigFixTest do
  def test_fixed_config do
    IO.puts("🔧 Testing Fixed Header Configuration")
    
    # Updated configuration (HEX instead of BCD)
    header_config = %{
      enabled: true,
      type: :base1,
      encoding: :hex,  # Fixed from :bcd to :hex
      pattern: "6000782000",
      length: 5,
      source_address_offset: 2,
      source_address_length: 2,
      dest_address_offset: 4,
      dest_address_length: 2
    }
    
    # Your actual packet data
    packet_hex = "60007820000400703C078000C282051648549806007367400000000000000000050000000220912500917310500510000078200313233343536373131323334353637383930313233343500817B226F72696744617465223A223230323530393137222C226F7269674D7469223A2230323030222C226F7269675472616365223A22303030303232222C226F72696754696D65223A22303931323530227D3738340028950500800400009F1E0832333733303030319F100706011203A0A80200063030303030311234567812345678"
    
    case Base.decode16(packet_hex) do
      {:ok, packet_data} ->
        IO.puts("✅ Packet decoded: #{byte_size(packet_data)} bytes")
        
        # Test header extraction with correct HEX encoding
        case Base.decode16(header_config.pattern) do
          {:ok, expected_header_binary} ->
            IO.puts("✅ Pattern converts from HEX: #{Base.encode16(expected_header_binary)}")
            
            # Check if packet starts with expected header
            header_size = header_config.length
            <<actual_header::binary-size(header_size), remaining::binary>> = packet_data
            
            if actual_header == expected_header_binary do
              IO.puts("✅ Header matches! Extracted #{byte_size(actual_header)} bytes")
              IO.puts("   Header (hex): #{Base.encode16(actual_header)}")
              IO.puts("   Remaining ISO data: #{byte_size(remaining)} bytes")
              IO.puts("   First 10 bytes of ISO: #{Base.encode16(binary_part(remaining, 0, 10))}")
            else
              IO.puts("❌ Header mismatch!")
              IO.puts("   Expected: #{Base.encode16(expected_header_binary)}")
              IO.puts("   Got:      #{Base.encode16(actual_header)}")
            end
            
          :error ->
            IO.puts("❌ Invalid hex pattern")
        end
        
      :error ->
        IO.puts("❌ Failed to decode packet")
    end
    
    IO.puts("\n📋 Configuration Summary:")
    IO.puts("   Port: 8583")
    IO.puts("   Encoding: #{header_config.encoding} (was :bcd, now :hex)")
    IO.puts("   Pattern: #{header_config.pattern}")
    IO.puts("   Length: #{header_config.length} bytes")
    IO.puts("   Type: #{header_config.type}")
  end
end

HeaderConfigFixTest.test_fixed_config()