# Test YSP Transaction Processor with Actual Device Packet
# This simulates a real POS device sending a sale transaction

alias DaProductApp.MercuryISO8583.Packagers.ISOMsg
alias DaProductApp.Acquirer.YSP.TransactionProcessor
alias DaProductApp.Switch.UpstreamRouter

IO.puts("=== Testing YSP Transaction with Actual Device Packet ===")

# Real device packet data (Sale transaction - MTI 0200)
# This represents what a real POS terminal would send
# Using Visa BIN to test that YSP acquirer can handle any card network
device_packet_data = %{
  mti: "0200",
  fields: %{
    2 => "4854980600736740",           # Primary Account Number (Visa BIN)
    3 => "000000",                     # Processing Code (Sale)
    4 => "000000002600",               # Transaction Amount ($26.00)
    11 => "000453",                    # System Trace Audit Number (STAN)
    12 => "144505",                    # Local Transaction Time (HHMMSS)
    13 => "0924",                      # Local Transaction Date (MMDD)
    14 => "3105",                      # Expiration Date (YYMM)
    22 => "051",                       # POS Entry Mode (Chip with PIN)
    23 => "000",                       # Card Sequence Number
    24 => "782",                       # Network Identification Number (YSP)
    25 => "00",                        # POS Condition Code (Normal)
    35 => "4854980600736740=31052060011790", # Track 2 Data (Visa)
    37 => "25267144338",               # Retrieval Reference Number
    41 => "12345671",                  # Terminal ID
    42 => "123456789012345",           # Merchant ID
    49 => "840"                        # Currency Code (USD)
  }
}

IO.puts("Device Packet Details:")
IO.puts("- MTI: #{device_packet_data.mti} (Sale Request)")
IO.puts("- Terminal ID: #{device_packet_data.fields[41]}")
IO.puts("- Merchant ID: #{device_packet_data.fields[42]}")
IO.puts("- Amount: $#{String.to_integer(device_packet_data.fields[4]) / 100}")
IO.puts("- Card Number: #{String.slice(device_packet_data.fields[2], 0..5)}...#{String.slice(device_packet_data.fields[2], -4..-1)}")
IO.puts("- NII: #{device_packet_data.fields[24]} (YSP Network)")
IO.puts("")

# Create ISOMsg from device packet
device_message = ISOMsg.new(device_packet_data.mti)

# Set all fields from device packet
final_message = 
  Enum.reduce(device_packet_data.fields, device_message, fn {field_num, value}, msg ->
    ISOMsg.set(msg, field_num, value)
  end)

IO.puts("Created ISOMsg from device packet:")
IO.puts("MTI: #{final_message.mti}")
IO.puts("Fields present: #{Map.keys(final_message.fields) |> Enum.sort() |> Enum.join(", ")}")
IO.puts("")

# Check upstream router status
IO.puts("=== Checking Upstream Router Status ===")
router_status = GenServer.call(UpstreamRouter, :get_status)
IO.puts("Router Status: #{inspect(router_status)}")

# Find which network this will route to
ysp_networks = Enum.filter(router_status.networks, fn {name, _} -> 
  String.contains?(to_string(name), "ysp") 
end)

IO.puts("Available YSP Networks:")
Enum.each(ysp_networks, fn {name, info} ->
  IO.puts("- #{name}: #{info.status} (#{info.host}:#{info.port})")
end)
IO.puts("")

# Transaction context
context = %{
  transaction_trace_id: "DEVICE_TEST_#{:rand.uniform(999999)}",
  source: "actual_device_simulation",
  timestamp: DateTime.utc_now()
}

IO.puts("=== Processing Transaction with YSP TransactionProcessor ===")
IO.puts("Trace ID: #{context.transaction_trace_id}")
IO.puts("Starting transaction processing...")
IO.puts("")

try do
  # Process the transaction
  result = TransactionProcessor.process_sale(final_message, context)
  
  case result do
    {:ok, response_message, final_transaction} ->
      IO.puts("✅ TRANSACTION SUCCESSFUL!")
      IO.puts("")
      IO.puts("Response Message:")
      IO.puts("- MTI: #{response_message.mti}")
      IO.puts("- Response Code: #{ISOMsg.get(response_message, 39)}")
      IO.puts("- Auth Code: #{ISOMsg.get(response_message, 38)}")
      IO.puts("- Reference: #{ISOMsg.get(response_message, 37)}")
      IO.puts("")
      IO.puts("Final Transaction Record:")
      IO.puts("- ID: #{final_transaction.id}")
      IO.puts("- Amount: #{final_transaction.total_amount}")
      IO.puts("- Response Code: #{final_transaction.response_code}")
      IO.puts("- Response Message: #{final_transaction.response_message}")
      IO.puts("- Approval Code: #{final_transaction.approval_code}")
      IO.puts("- Reference No: #{final_transaction.reference_no}")
      IO.puts("- Terminal: #{final_transaction.s_tid}")
      IO.puts("- Merchant: #{final_transaction.s_mid}")
      IO.puts("")
      
    {:error, reason} ->
      IO.puts("❌ TRANSACTION FAILED!")
      IO.puts("Reason: #{inspect(reason)}")
      IO.puts("")
      
    other ->
      IO.puts("❓ UNEXPECTED RESULT!")
      IO.puts("Result: #{inspect(other)}")
      IO.puts("")
  end
  
rescue
  exception ->
    IO.puts("💥 EXCEPTION OCCURRED!")
    IO.puts("Exception: #{inspect(exception)}")
    IO.puts("Stacktrace:")
    IO.puts(Exception.format_stacktrace(__STACKTRACE__))
end

IO.puts("=== Test Complete ===")