#!/usr/bin/env bash
set -euo pipefail
# Serve the built workflow-runner binary over HTTP for local VMs to download.
# This is intended for local development only.
#
# Env:
#   SOL_RUNNER_PORT   - port to bind (default: 8089)
#   SOL_RUNNER_BIND   - bind address (default: 0.0.0.0)
#   SOL_RUNNER_BINARY - path to runner binary (default: target/debug/solstice-runner)
#
# The file will be exposed at http://HOST:PORT/solstice-runner

ROOT_DIR=$(cd "$(dirname "$0")/../../.." && pwd)
cd "$ROOT_DIR"

command -v cargo >/dev/null 2>&1 || { echo "cargo is required" >&2; exit 127; }
PYTHON=${PYTHON:-python3}
if ! command -v "$PYTHON" >/dev/null 2>&1; then
  echo "python3 is required to run a simple HTTP server" >&2
  exit 127
fi

# Build runner if not present
BINARY_DEFAULT="$ROOT_DIR/target/debug/solstice-runner"
export SOL_RUNNER_BINARY=${SOL_RUNNER_BINARY:-$BINARY_DEFAULT}
if [[ ! -x "$SOL_RUNNER_BINARY" ]]; then
  cargo build -p workflow-runner >/dev/null
  if [[ ! -x "$SOL_RUNNER_BINARY" ]]; then
    echo "runner binary not found at $SOL_RUNNER_BINARY after build" >&2
    exit 1
  fi
fi

# Prepare serve dir under target
SERVE_DIR="$ROOT_DIR/target/runner-serve"
mkdir -p "$SERVE_DIR"
cp -f "$SOL_RUNNER_BINARY" "$SERVE_DIR/solstice-runner"
chmod +x "$SERVE_DIR/solstice-runner" || true

PORT=${SOL_RUNNER_PORT:-8089}
BIND=${SOL_RUNNER_BIND:-0.0.0.0}

echo "Serving solstice-runner from $SERVE_DIR on http://$BIND:$PORT (Ctrl-C to stop)" >&2
exec "$PYTHON" -m http.server "$PORT" --bind "$BIND" --directory "$SERVE_DIR"