#!/usr/bin/env bash
# MSD Core bootstrap — one-line install from the public repo.
#
#   curl -fsSL https://msd.golem15.com | bash
#   curl -fsSL https://msd.golem15.com | bash -s -- --codex --profile standard
#
# Clones (or updates) the MSD checkout into $MSD_HOME, builds it, and runs
# bin/install.js globally for the chosen runtime(s). Installs Claude Code
# first when it is the target runtime and `claude` is not on PATH.
#
# Everything lives inside main() so a truncated download never runs half a script.

main() {
  set -euo pipefail

  local repo="${MSD_REPO:-https://git.golem15.com/golem15/msd-core.git}"
  local ref="${MSD_REF:-next}"
  local home_dir="${MSD_HOME:-$HOME/.local/share/msd-core}"
  local profile="${MSD_PROFILE:-full}"
  local install_claude=true
  local runtimes=()

  while (($#)); do
    case "$1" in
      --claude|--codex|--opencode|--cursor|--zcode|--antigravity) runtimes+=("$1") ;;
      --profile)
        shift
        (($#)) || { echo "ERROR: --profile requires a value." >&2; exit 2; }
        profile="$1"
        ;;
      --profile=*) profile="${1#--profile=}" ;;
      --ref)
        shift
        (($#)) || { echo "ERROR: --ref requires a value." >&2; exit 2; }
        ref="$1"
        ;;
      --skip-claude-install) install_claude=false ;;
      -h|--help)
        cat <<'EOF'
MSD Core bootstrap

Usage: curl -fsSL https://msd.golem15.com | bash -s -- [options]

Options:
  --claude, --codex, --opencode, --cursor, --zcode, --antigravity
                         Runtime(s) to install for (default: --claude)
  --profile NAME         Skill profile: core, standard or full (default: full)
  --ref REF              Branch or tag to install (default: next)
  --skip-claude-install  Do not install Claude Code when it is missing

Environment: MSD_HOME (checkout dir, default ~/.local/share/msd-core),
             MSD_REPO, MSD_REF, MSD_PROFILE
EOF
        exit 0
        ;;
      *) echo "ERROR: unknown argument: $1 (try --help)" >&2; exit 2 ;;
    esac
    shift
  done
  ((${#runtimes[@]})) || runtimes=(--claude)

  case "$profile" in
    core|standard|full) ;;
    *) echo "ERROR: profile must be core, standard or full; got: $profile" >&2; exit 2 ;;
  esac

  say() { printf '\033[36m==>\033[0m %s\n' "$*"; }

  command -v git >/dev/null 2>&1 || { echo "ERROR: git is required." >&2; exit 1; }
  local node_major
  node_major=$(node -p 'process.versions.node.split(".")[0]' 2>/dev/null || echo 0)
  if ((node_major < 24)); then
    cat >&2 <<EOF
ERROR: MSD needs Node.js 24 or newer (found: $(node --version 2>/dev/null || echo none)).
Install it, e.g. with nvm:
  curl -fsSL https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.3/install.sh | bash
  nvm install 24
then rerun this command.
EOF
    exit 1
  fi

  if ! command -v jq >/dev/null 2>&1; then
    printf '\033[33mWARNING:\033[0m jq is not installed; MSD workflows rely on it.\n' >&2
    echo '         Install it (apt install jq / brew install jq) after this finishes.' >&2
  fi

  if [[ " ${runtimes[*]} " == *" --claude "* ]] && $install_claude \
    && ! command -v claude >/dev/null 2>&1 && [[ ! -x "$HOME/.local/bin/claude" ]]; then
    say "Installing Claude Code"
    curl -fsSL https://claude.ai/install.sh | bash
  fi

  if [[ -d "$home_dir/.git" ]]; then
    say "Updating $home_dir ($ref)"
    if [[ -n "$(git -C "$home_dir" status --porcelain --untracked-files=no)" ]]; then
      echo "ERROR: $home_dir has local changes; commit or discard them first." >&2
      exit 1
    fi
    git -C "$home_dir" fetch --quiet origin "$ref"
    git -C "$home_dir" checkout --quiet --detach FETCH_HEAD
  else
    say "Cloning MSD into $home_dir ($ref)"
    mkdir -p "$(dirname "$home_dir")"
    git clone --quiet --branch "$ref" "$repo" "$home_dir"
  fi

  cd "$home_dir"
  say "Installing dependencies and building"
  npm ci --no-audit --no-fund --loglevel=error
  npm run --silent build:hooks

  local rt
  for rt in "${runtimes[@]}"; do
    say "Installing MSD for ${rt#--} (profile: $profile)"
    node bin/install.js "$rt" --global "--profile=$profile"
  done

  cat <<EOF

MSD installed from $home_dir ($(git rev-parse --short HEAD)).
Update any time by rerunning:  curl -fsSL https://msd.golem15.com | bash
EOF
  if [[ " ${runtimes[*]} " == *" --claude "* ]] && ! command -v claude >/dev/null 2>&1; then
    echo 'Add Claude Code to your PATH:  export PATH="$HOME/.local/bin:$PATH"'
  fi
}

main "$@"