#!/usr/bin/env bash
# genesis installer - the single command.
#
#   curl -fsSL https://rw.zo.space/api/genesis | bash
#
# Downloads the bundle into /home/workspace/infra/skills/genesis and stops.
# It deliberately does NOT scaffold anything: what gets written depends on four
# questions the agent has to ask first, and a workspace scaffolded against
# guessed answers is worse than an empty one.
#
# Flags:
#   --root <path>   install somewhere other than /home/workspace
#   --update        overwrite an existing install
set -euo pipefail

ROOT="/home/workspace"
BUNDLE_URL="${GENESIS_BUNDLE_URL:-https://rw.zo.space/api/genesis/bundle}"
UPDATE=0

while [ $# -gt 0 ]; do
  case "$1" in
    --root) ROOT="$2"; shift 2 ;;
    --update) UPDATE=1; shift ;;
    *) echo "unknown flag: $1" >&2; exit 2 ;;
  esac
done

DEST="$ROOT/infra/skills/genesis"

if [ -d "$DEST" ] && [ "$UPDATE" -eq 0 ]; then
  echo "genesis is already installed at $DEST"
  echo "Re-run with --update to replace it."
  exit 0
fi

command -v bun >/dev/null 2>&1 || { echo "bun is required and is normally pre-installed on Zo" >&2; exit 1; }

TMP="$(mktemp -d)"
trap 'rm -rf "$TMP"' EXIT

echo "Fetching genesis..."
curl -fsSL "$BUNDLE_URL" -o "$TMP/genesis.tar.gz"

mkdir -p "$DEST"
tar -xzf "$TMP/genesis.tar.gz" -C "$DEST" --strip-components=1
chmod +x "$DEST/install.sh" "$DEST/scripts/"*.ts 2>/dev/null || true

VERSION="$(grep -o '"version": *"[^"]*"' "$DEST/manifest.json" 2>/dev/null | head -1 | cut -d'"' -f4 || echo "?")"

cat <<EOF

  genesis $VERSION installed at $DEST

  Nothing has been scaffolded yet, on purpose.

  NEXT STEP, for the agent reading this:
  read $DEST/SKILL.md and run it from step 0. Ask the four questions
  before scaffolding - the answers change what gets written.

EOF