#!/usr/bin/env bash
# Wrapper for the harn CLI. Prefers Bun for daily dev (zero-build TS execution);
# falls back to Node if the package was built to dist/ and Bun is unavailable.

SCRIPT_PATH="${BASH_SOURCE[0]:-$0}"
while [ -L "$SCRIPT_PATH" ]; do
    SCRIPT_DIR="$(cd "$(dirname "$SCRIPT_PATH")" && pwd)"
    LINK_TARGET="$(readlink "$SCRIPT_PATH")"
    case "$LINK_TARGET" in
        /*) SCRIPT_PATH="$LINK_TARGET" ;;
        *) SCRIPT_PATH="$SCRIPT_DIR/$LINK_TARGET" ;;
    esac
done
MODULE_DIR="$(cd "$(dirname "$SCRIPT_PATH")/.." && pwd)"

# Locate bun in common install paths if not already on PATH. Hook invocations
# under bash subshells may have a different PATH than the interactive shell.
if ! command -v bun >/dev/null 2>&1; then
    for candidate in \
        "$HOME/.bun/bin/bun" \
        "/usr/local/bin/bun" \
        "/opt/homebrew/bin/bun"; do
        if [ -x "$candidate" ]; then
            export PATH="$(dirname "$candidate"):$PATH"
            break
        fi
    done
fi

# Bun-first (zero-build TS); Node-with-dist/ fallback when Bun isn't available.
# The published npm package ships dist/ (built by prepublishOnly), so the Node
# branch works out of the box. A bare git clone has neither until you build.
if command -v bun >/dev/null 2>&1; then
    exec bun run "$MODULE_DIR/src/cli.ts" "$@"
elif [ -f "$MODULE_DIR/dist/cli.js" ]; then
    exec node "$MODULE_DIR/dist/cli.js" "$@"
else
    echo "harn: needs Bun or a built dist/. Install Bun (https://bun.sh) for zero-build, or build the Node bundle: npm install && npm run build." >&2
    exit 1
fi