#!/usr/bin/env bash
set -euo pipefail

DEFAULT_BASE_URL="https://get.orbnetes.cloud"
ORBN_GET_BASE_URL="${ORBN_GET_BASE_URL:-$DEFAULT_BASE_URL}"
ORBN_RELEASE_CHANNEL="${ORBN_RELEASE_CHANNEL:-stable}"

usage() {
  cat <<'EOF'
Orbnetes installer (latest stable wrapper)

Usage:
  bash install.sh [installer args...]

Environment:
  ORBN_GET_BASE_URL       Base URL for installer assets (default: https://get.orbnetes.cloud)
  ORBN_RELEASE_CHANNEL    Release channel key from latest.json (default: stable)

Example:
  curl -fsSL https://get.orbnetes.cloud/install.sh | bash
  curl -fsSL https://get.orbnetes.cloud/install.sh | bash -s -- --app-url http://localhost:8080
EOF
}

if [ "${1:-}" = "-h" ] || [ "${1:-}" = "--help" ]; then
  usage
  exit 0
fi

require_cmd() {
  local c="$1"
  if ! command -v "$c" >/dev/null 2>&1; then
    echo "Required command not found: $c"
    exit 1
  fi
}

require_cmd curl
require_cmd bash

LATEST_URL="${ORBN_GET_BASE_URL%/}/latest.json"
latest_json="$(curl -fsSL "$LATEST_URL")"

extract_version() {
  local json="$1"
  local channel="$2"
  if command -v jq >/dev/null 2>&1; then
    printf '%s' "$json" | jq -r --arg ch "$channel" '.[$ch] // empty'
    return
  fi

  # Fallback parser for simple flat JSON: {"stable":"1.8.0","beta":"1.9.0-beta.1"}
  printf '%s' "$json" \
    | tr -d '\n' \
    | sed -E 's/[[:space:]]+//g' \
    | sed -nE "s/.*\"${channel}\":\"([^\"]+)\".*/\1/p"
}

version="$(extract_version "$latest_json" "$ORBN_RELEASE_CHANNEL")"
if [ -z "$version" ]; then
  echo "Unable to resolve version for channel '${ORBN_RELEASE_CHANNEL}' from ${LATEST_URL}"
  exit 1
fi

installer_url="${ORBN_GET_BASE_URL%/}/install-v${version}.sh"
tmp_installer="$(mktemp -t orbnetes-install-XXXXXX.sh)"
trap 'rm -f "$tmp_installer"' EXIT

echo "Resolved ${ORBN_RELEASE_CHANNEL} -> v${version}"
echo "Downloading ${installer_url}"
curl -fsSL "$installer_url" -o "$tmp_installer"
chmod +x "$tmp_installer"

exec bash "$tmp_installer" "$@"