#!/usr/bin/env bash
# Thin launch vehicle for the Knoe installer.
#
# Local execution (from a repo checkout):
#   ./install.sh [args...]
#
# Bootstrap via curl (first-time install):
#   curl -fsSL https://knoey.com/install.sh | bash
#
# ---------------------------------------------------------------------------
# Dual-cluster GKE architecture (prod / k8s mode)
# ---------------------------------------------------------------------------
#   knoe-dev-0      — Autopilot cluster: app workloads (GitLab, platform), service mesh knoe-0
#   knoe-cnpg-0     — Standard GKE cluster: CloudNative-PG only (rw/ro/r pod separation)
#                     3 nodes × e2-standard-2, node pool: cnpg-db-pool
#
# GCP quota requirements (project: plenary-truck-485623-p7, region: us-west3):
#   pd-standard : node boot disks  (3 × 50 GB = 150 GB — does NOT count against pd-ssd quota)
#   pd-ssd      : PGDATA PVCs      (3 × 50 Gi = 150 Gi)
#                 WAL PVCs         (3 × 50 Gi = 150 Gi)
#                 Total pd-ssd     = 300 Gi  (requires 300 GB pd-ssd regional quota)
#
# To patch an existing knoe-cnpg-0 cluster with wrong boot disk type:
#   ./scripts/patch_clusters.sh          # dry-run first: DRY_RUN=true ./scripts/patch_clusters.sh
# ---------------------------------------------------------------------------

set -euo pipefail

# Repo URL used only during bootstrap (curl-pipe) installs.
KNOE_REPO_URL="${KNOE_REPO_URL:-https://gitlab.knoey.com/knoe/knoe.git}"
# Default install directory for bootstrap installs.
_INSTALL_DIR="${KNOE_HOME:-$HOME/knoe}"

_check_gcp_tools() {
  # gcloud is only required for GKE (k8s) deploys — skip for k3d, k3s, and min modes
  for arg in "$@"; do
    if [[ "$arg" == "--min" || "$arg" == "--k3d" || "$arg" == "--k3s" ]]; then
      return 0
    fi
  done
  # Skip when a non-GKE config is explicitly passed (only gke.cfg needs gcloud)
  local prev=""
  for arg in "$@"; do
    if [[ ("$prev" == "-c" || "$prev" == "--config") && "$arg" != *gke* ]]; then
      return 0
    fi
    prev="$arg"
  done

  local missing=0
  if ! command -v gcloud >/dev/null 2>&1; then
    echo "Error: gcloud CLI is required for GKE cluster management." >&2
    echo "  Install: https://cloud.google.com/sdk/docs/install" >&2
    missing=1
  fi
  if ! command -v kubectl >/dev/null 2>&1; then
    echo "Error: kubectl is required for Kubernetes cluster operations." >&2
    echo "  Install: https://kubernetes.io/docs/tasks/tools/" >&2
    missing=1
  fi
  if [[ "$missing" -ne 0 ]]; then
    echo "" >&2
    echo "Install missing tools and re-run install.sh." >&2
    exit 1
  fi
}

_bootstrap() {
  echo "==> Bootstrapping Knoe installer..."
  command -v git     >/dev/null 2>&1 || { echo "Error: git is required." >&2; exit 1; }
  command -v python3 >/dev/null 2>&1 || { echo "Error: python3 is required." >&2; exit 1; }

  if [[ -d "${_INSTALL_DIR}/.git" ]]; then
    echo "==> Updating existing checkout at ${_INSTALL_DIR} ..."
    git -C "${_INSTALL_DIR}" pull --ff-only
  else
    echo "==> Cloning to ${_INSTALL_DIR} ..."
    git clone "${KNOE_REPO_URL}" "${_INSTALL_DIR}"
  fi

  exec "${_INSTALL_DIR}/install.sh" "$@"
}

# Resolve script directory; empty when running via curl pipe.
_src="${BASH_SOURCE[0]:-}"
_script_dir="$(cd "$(dirname "${_src:-/}")" 2>/dev/null && pwd || echo "")"

if [[ -n "${_script_dir}" && -d "${_script_dir}/knoe" ]]; then
  # Local checkout: delegate to the Python installer module.
  cd "${_script_dir}"

  # kubectl-context notice. install.sh defers mode selection to the Python
  # TUI, so we can't strictly verify here — but printing the inherited
  # context up-front gives the user a chance to abort before the TUI
  # launches if it looks wrong (e.g. shell on GKE while planning a k3d
  # install). Filed against docs/TODO.md queue item #1 (drift R4); the
  # mode-aware strict guard runs in deploy.sh (which knows its config) and
  # should also run Python-side once the welcome screen records a mode.
  if [[ -f "${_script_dir}/etc/preflight_kubecontext.sh" ]]; then
    _is_min=0
    for arg in "$@"; do
      if [[ "$arg" == "--min" ]]; then _is_min=1; break; fi
    done
    if [[ "$_is_min" -eq 0 ]]; then
      # shellcheck source=etc/preflight_kubecontext.sh
      source "${_script_dir}/etc/preflight_kubecontext.sh"
      print_kubecontext_notice
    fi
    unset _is_min
  fi

  # 1Password preflight — sign in, create 'knoey' vault, ensure 'administrator' item.
  # Skipped in --min mode (init_1password.sh handles the flag check itself).
  if [[ -f "${_script_dir}/etc/init_1password.sh" ]]; then
    bash "${_script_dir}/etc/init_1password.sh" "$@" || true
  fi

  # If a built binary exists, prefer it.
  if [[ -x "dist/knoe" ]]; then
    exec "./dist/knoe" "$@"
  fi

  # Prefer the venv Python at KNOE_HOME (or the repo root) when available;
  # it carries all knoe_requirements.txt dependencies.
  _VENV_PYTHON="${KNOE_HOME:-${_script_dir}}/bin/python3"
  _check_gcp_tools "$@"
  if [[ -x "${_VENV_PYTHON}" ]]; then
    exec "${_VENV_PYTHON}" -m knoe.ui.screens "$@"
  fi
  exec python3 -m knoe.ui.screens "$@"
else
  # No local checkout found — bootstrap from the remote repo.
  _bootstrap "$@"
fi