#!/usr/bin/env bash
# Installs Unity's MIT-licensed vscode-unity-debug adapter for nvim-dap and
# patches it to find editors however they were launched (see patch.cs).
# Re-runnable: always re-extracts and re-patches from the pristine .vsix.
set -euo pipefail

VERSION=3.0.1
HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DEST="${1:-${XDG_DATA_HOME:-$HOME/.local/share}/nvim/unity-debug}"
BIN="$DEST/extension/bin"

for cmd in curl unzip mono mcs; do
    command -v "$cmd" >/dev/null || { echo "unity-debug install: missing '$cmd'" >&2; exit 1; }
done

mkdir -p "$DEST"
VSIX="$DEST/unity-debug-$VERSION.vsix"
[ -f "$VSIX" ] || curl -fsSL -o "$VSIX" \
    "https://github.com/Unity-Technologies/vscode-unity-debug/releases/download/Version-$VERSION/unity-debug-$VERSION.vsix"
rm -rf "$DEST/extension"
unzip -qo "$VSIX" -d "$DEST"

TMP="$(mktemp -d)"
trap 'rm -rf "$TMP"' EXIT
mcs "$HERE/patch.cs" -r:"$BIN/Mono.Cecil.dll" -out:"$TMP/patch.exe"
cp "$BIN/UnityDebug.exe" "$BIN/UnityDebug.exe.orig"
MONO_PATH="$BIN" mono "$TMP/patch.exe" "$BIN/UnityDebug.exe.orig" "$TMP/UnityDebug.exe"
cp "$TMP/UnityDebug.exe" "$BIN/UnityDebug.exe"
echo "unity-debug installed and patched in $DEST"