#!/usr/bin/env bash

set -u
BASE_DIR="/srv/manifests"

# Compose-Binary ermitteln
if docker compose version >/dev/null 2>&1; then
  COMPOSE() { docker compose "$@"; }
elif command -v docker-compose >/dev/null 2>&1; then
  COMPOSE() { docker-compose "$@"; }
else
  echo "ERROR: Weder 'docker compose' noch 'docker-compose' gefunden." >&2
  exit 1
fi

compose_files=(docker-compose.yml docker-compose.yaml compose.yml compose.yaml)

cd "$BASE_DIR" || { echo "ERROR: Kann $BASE_DIR nicht betreten"; exit 1; }

# Ordnerliste (optional: nur übergebene)
if [ "$#" -gt 0 ]; then
  dirs=("$@")
else
  mapfile -t dirs < <(find . -maxdepth 1 -mindepth 1 -type d -printf "%P\n" | LC_ALL=C sort)
fi

overall_rc=0

detect_strategy() {
  local dir="$1"
  local strategy="pull"  # default

  # 1) Markerdateien
  if [ -f "$dir/.update-with-build" ]; then
    strategy="build"
  elif [ -f "$dir/.update-with-pull" ]; then
    strategy="pull"
  # 2) .env Variable
  elif [ -f "$dir/.env" ]; then
    # Nur einfache, robuste Extraktion
    local val
    val="$(grep -E '^\s*UPDATE_STRATEGY\s*=' "$dir/.env" | tail -n1 | cut -d= -f2 | tr -d '[:space:]' || true)"
    if [ "$val" = "build" ]; then
      strategy="build"
    elif [ "$val" = "pull" ]; then
      strategy="pull"
    fi
  fi

  echo "$strategy"
}

has_compose_file() {
  local dir="$1"
  for f in "${compose_files[@]}"; do
    [ -f "$dir/$f" ] && return 0
  done
  return 1
}

for d in "${dirs[@]}"; do
  [ -d "$d" ] || { echo "SKIP: $d ist kein Ordner"; continue; }
  if ! has_compose_file "$d"; then
    echo "SKIP: $d (keine Compose-Datei gefunden)"
    continue
  fi

  strategy="$(detect_strategy "$d")"

  case "$strategy" in
    build)
      echo "==== $d: up -d --build ===="
      if ! (cd "$d" && COMPOSE up -d --build); then
        echo "WARN: $d -> up -d --build fehlgeschlagen"
        overall_rc=1
        continue
      fi
      ;;
    pull|*)
      echo "==== $d: pull ===="
      if ! (cd "$d" && COMPOSE pull); then
        echo "WARN: $d -> pull fehlgeschlagen"
        overall_rc=1
        # trotzdem versuchen zu starten
      fi
      echo "==== $d: up -d ===="
      if ! (cd "$d" && COMPOSE up -d); then
        echo "WARN: $d -> up -d fehlgeschlagen"
        overall_rc=1
        continue
      fi
      ;;
  esac

  echo "OK: $d aktualisiert"
done

exit "$overall_rc"