#!/usr/bin/env bash
# ==========================================================
#  Eduxel Installer Proxy (/i)
#  Lädt den neuesten Installer aus den GitHub Releases
#  Command bleibt: curl -sSL https://edu-core.dev/i | sudo bash
# ==========================================================

set -euo pipefail

REPO="EduCore-Development/eduxel-server-application-installer"
ASSET="install.sh"
TMP="/tmp/eduxel-install.sh"

fail() { echo "[Eduxel] Fehler: $*" >&2; exit 1; }

need_root() {
  if [[ "${EUID:-999}" -ne 0 ]]; then
    fail "Bitte mit sudo ausführen: curl -sSL https://edu-core.dev/i | sudo bash"
  fi
}

pm_detect() {
  if command -v apt-get >/dev/null 2>&1; then echo apt; return; fi
  if command -v dnf >/dev/null 2>&1; then echo dnf; return; fi
  if command -v yum >/dev/null 2>&1; then echo yum; return; fi
  if command -v pacman >/dev/null 2>&1; then echo pacman; return; fi
  if command -v zypper >/dev/null 2>&1; then echo zypper; return; fi
  if command -v apk >/dev/null 2>&1; then echo apk; return; fi
  echo unknown
}

pm_install() {
  local pm="$1"; shift
  local pkgs=("$@")
  case "$pm" in
    apt)
      apt-get update -y >/dev/null 2>&1 || true
      DEBIAN_FRONTEND=noninteractive apt-get install -y "${pkgs[@]}" >/dev/null 2>&1
      ;;
    dnf) dnf install -y "${pkgs[@]}" >/dev/null 2>&1 ;;
    yum) yum install -y "${pkgs[@]}" >/dev/null 2>&1 ;;
    pacman) pacman -Sy --noconfirm "${pkgs[@]}" >/dev/null 2>&1 ;;
    zypper) zypper --non-interactive in "${pkgs[@]}" >/dev/null 2>&1 ;;
    apk) apk add --no-cache "${pkgs[@]}" >/dev/null 2>&1 ;;
    *) fail "Kein unterstützter Package Manager gefunden." ;;
  esac
}

ensure_curl() {
  if command -v curl >/dev/null 2>&1; then return; fi
  local pm
  pm="$(pm_detect)"
  [[ "$pm" != "unknown" ]] || fail "Kein Package Manager gefunden, kann curl nicht installieren."

  echo "[Eduxel] Bootstrap: installiere curl..."
  case "$pm" in
    apt) pm_install "$pm" ca-certificates curl ;;
    dnf|yum) pm_install "$pm" ca-certificates curl ;;
    pacman) pm_install "$pm" ca-certificates curl ;;
    zypper) pm_install "$pm" ca-certificates curl ;;
    apk) pm_install "$pm" ca-certificates curl ;;
  esac

  command -v curl >/dev/null 2>&1 || fail "curl konnte nicht installiert werden."
}

main() {
  need_root
  ensure_curl

  echo "[Eduxel] Lade neuesten Installer aus GitHub Releases..."
  URL="https://github.com/${REPO}/releases/latest/download/${ASSET}"

  curl -fsSL "$URL" -o "$TMP" || fail "Konnte ${ASSET} nicht laden (Release Asset fehlt oder URL down)."
  chmod +x "$TMP"

  echo "[Eduxel] Starte Installer..."
  exec bash "$TMP" "$@"
}

main "$@"