#!/bin/sh
# Installs a global `opencode-sandbox` shim at ~/.local/bin so that command,
# run from any directory, launches OpenCode v2 from the local sbx template
# registered by `make build` — with the directory you're standing in as the
# sandbox's workspace.
#
# POSIX sh only (no bashisms) -- this may run under any login shell's `sh`,
# not necessarily the user's interactive shell.
#
# Named opencode-sandbox, not opencode, so it doesn't shadow a real,
# locally-installed opencode CLI on PATH.
#
# Pattern (shell/OS detection, marker-based idempotent PATH edit, resolving
# the login shell via $SHELL rather than the script's own running shell)
# adapted from https://cloud.inputobjects.eu/forge/jrozanski/opencode-sandbox/src/branch/main/scripts/install-shortcut.sh
set -eu

BIN_DIR="$HOME/.local/bin"
SHIM="$BIN_DIR/opencode-sandbox"

mkdir -p "$BIN_DIR"

cat > "$SHIM" <<'EOF'
#!/bin/sh
# sbx run accepts -t/--template only at sandbox creation time; re-running
# against an existing sandbox with a template fails. So pass the template
# only when the named sandbox doesn't exist yet.
TEMPLATE=localhost/opencode-v2:local

# Extract --name VALUE / --name=VALUE from the arguments, if given.
name=
prev=
for arg in "$@"; do
  [ "$prev" = --name ] && name=$arg
  case "$arg" in
    --name=*) name=${arg#--name=} ;;
  esac
  prev=$arg
done

if [ -n "$name" ] && sbx ls -q 2>/dev/null | grep -Fxq -- "$name"; then
  exec sbx run "$@" opencode
fi

exec sbx run -t "$TEMPLATE" "$@" opencode
EOF
chmod +x "$SHIM"
echo "==> Installed shim: $SHIM"

# Already on PATH? Nothing left to do.
case ":$PATH:" in
  *":$BIN_DIR:"*)
    echo "==> $BIN_DIR is already on PATH."
    exit 0
    ;;
esac

# Resolve the user's *login* shell via $SHELL, not the shell running this
# script, so the right config file gets edited regardless of how this
# script itself was invoked.
shell_name=$(basename "${SHELL:-}")

if [ "$shell_name" = fish ] && command -v fish >/dev/null 2>&1; then
  # fish_add_path persists via a universal variable -- no config file to edit.
  fish -c "fish_add_path $BIN_DIR"
  echo "==> Added $BIN_DIR to PATH via fish_add_path."
  exit 0
fi

case "$shell_name" in
  zsh)
    # Prefer .zshrc (the standard interactive-shell file); if it doesn't
    # exist but .zshenv does, respect that existing setup instead of
    # scattering PATH across two files. Only create .zshrc if neither exists.
    if [ -f "$HOME/.zshrc" ]; then
      rc="$HOME/.zshrc"
    elif [ -f "$HOME/.zshenv" ]; then
      rc="$HOME/.zshenv"
    else
      rc="$HOME/.zshrc"
    fi
    ;;
  bash)
    # macOS Terminal.app runs bash as a login shell, sourcing
    # ~/.bash_profile (not ~/.bashrc) unless the user's profile chains to it.
    case "$(uname -s)" in
      Darwin) rc="$HOME/.bash_profile" ;;
      *)      rc="$HOME/.bashrc" ;;
    esac
    ;;
  *) rc="$HOME/.profile" ;;
esac

marker_begin="# >>> opencode-sandbox >>>"
marker_end="# <<< opencode-sandbox <<<"

if [ -f "$rc" ] && grep -qF "$marker_begin" "$rc"; then
  echo "==> $rc already configures PATH for opencode-sandbox; skipping."
else
  touch "$rc"
  {
    printf '\n%s\n' "$marker_begin"
    printf 'export PATH="%s:$PATH"\n' "$BIN_DIR"
    printf '%s\n' "$marker_end"
  } >> "$rc"
  echo "==> Added $BIN_DIR to PATH in $rc."
  echo "==> Restart your shell (or run: . $rc) to pick it up."
fi