#!/bin/bash
set -euo pipefail

usage() {
  echo "Usage: arduino-sim <firmware.elf> [platform]"
  echo ""
  echo "Launch Renode with a GDB server for debugging firmware."
  echo "Connect nvim-dap or gdb to localhost:3333"
  echo ""
  echo "Platforms:"
{{range .Platforms}}  echo "  {{.Name}}    {{.Machine}}"
{{end}}  exit 1
}

[[ $# -lt 1 ]] && usage

ELF="$1"
PLATFORM="${2:-{{(index .Platforms 0).Name}}}"

[[ ! -f "$ELF" ]] && echo "Error: $ELF not found" && exit 1

case "$PLATFORM" in
{{range .Platforms}}  {{.Name}})
    RENODE_PLATFORM="{{.ReplPath}}"
    MACHINE="{{.Machine}}"
    ;;
{{end}}  *)
    echo "Unknown platform: $PLATFORM"
    usage
    ;;
esac

RESC=$(mktemp /tmp/renode-XXXXXX.resc)
cat >"$RESC" <<EOF
using sysbus

mach create "$MACHINE"
machine LoadPlatformDescription @$RENODE_PLATFORM

sysbus LoadELF @$(realpath "$ELF")

machine StartGdbServer 3333

showAnalyzer sysbus.uart0 Antmicro.Renode.Analyzers.LoggingUartAnalyzer

start
EOF

echo "Starting Renode ($MACHINE) with GDB server on :3333"
echo "Connect debugger:  nvim → <leader>ds  or  gdb → target remote :3333"
echo ""

renode --disable-xwt "$RESC"
rm -f "$RESC"