#!/usr/bin/env bash

# Copyright (c) 2021-2026 community-scripts ORG
# Author: MickLesk (CanbiZ)
# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
# Source: https://github.com/portainer/portainer
if ! command -v curl &>/dev/null; then
  printf "\r\e[2K%b" '\033[93m Setup Source \033[m' >&2
  apt-get update >/dev/null 2>&1
  apt-get install -y curl >/dev/null 2>&1
fi
source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/core.func)
source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/tools.func)
source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/error_handler.func)
source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/api.func) 2>/dev/null || true
declare -f init_tool_telemetry &>/dev/null && init_tool_telemetry "portainer" "addon"

# Enable error handling
set -Eeuo pipefail
trap 'error_handler' ERR

# ==============================================================================
# CONFIGURATION
# ==============================================================================
APP="Portainer"
APP_TYPE="addon"
INSTALL_PATH="/opt/portainer"
COMPOSE_FILE="${INSTALL_PATH}/compose.yaml"
DEFAULT_PORT=9443

# Initialize all core functions (colors, formatting, icons, STD mode)
load_functions

# ==============================================================================
# UNINSTALL
# ==============================================================================
function uninstall() {
  msg_info "Uninstalling ${APP}"

  if [[ -f "$COMPOSE_FILE" ]]; then
    msg_info "Stopping and removing Docker containers"
    cd "$INSTALL_PATH"
    $STD docker compose down --volumes --remove-orphans
    msg_ok "Stopped and removed Docker containers"
  fi

  rm -rf "$INSTALL_PATH"
  rm -f "/usr/local/bin/update_portainer"
  msg_ok "${APP} has been uninstalled"
}

# ==============================================================================
# UPDATE
# ==============================================================================
function update() {
  msg_info "Pulling latest ${APP} image"
  cd "$INSTALL_PATH"
  $STD docker compose pull
  msg_ok "Pulled latest image"

  msg_info "Restarting ${APP}"
  $STD docker compose up -d --remove-orphans
  msg_ok "Restarted ${APP}"

  msg_ok "Updated successfully"
  exit
}

# ==============================================================================
# CHECK DOCKER
# ==============================================================================
function check_docker() {
  if ! command -v docker &>/dev/null; then
    msg_error "Docker is not installed. This script requires an existing Docker LXC. Exiting."
    exit 10
  fi
  if ! docker compose version &>/dev/null; then
    msg_error "Docker Compose plugin is not available. Please install it before running this script. Exiting."
    exit 10
  fi
  msg_ok "Docker $(docker --version | cut -d' ' -f3 | tr -d ',') and Docker Compose are available"
}

# ==============================================================================
# CHECK EXISTING CONTAINER
# ==============================================================================
function check_existing_container() {
  # Guards against clobbering a Portainer container not managed by this addon
  # (e.g. Business/Enterprise Edition installed manually or via the legacy docker.sh flow)
  if docker ps -a --format '{{.Names}}' | grep -q '^portainer$'; then
    msg_error "A container named 'portainer' already exists but is not managed by this addon."
    msg_error "This may be a Portainer Business/Enterprise Edition install or a manual setup."
    msg_error "Remove/rename that container first, or manage it manually. Exiting."
    exit 10
  fi
}

# ==============================================================================
# INSTALL
# ==============================================================================
function install() {
  check_docker
  check_existing_container

  msg_info "Creating install directory"
  mkdir -p "$INSTALL_PATH"
  msg_ok "Created ${INSTALL_PATH}"

  msg_info "Downloading Docker Compose file"
  curl -fsSL "https://downloads.portainer.io/ce-sts/portainer-compose.yaml" -o "$COMPOSE_FILE"
  msg_ok "Downloaded Docker Compose file"

  msg_info "Starting ${APP}"
  cd "$INSTALL_PATH"
  $STD docker compose up -d
  msg_ok "Started ${APP}"

  # Create update script
  msg_info "Creating update script"
  cat <<'UPDATEEOF' >/usr/local/bin/update_portainer
#!/usr/bin/env bash
# Portainer Update Script
type=update bash -c "$(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/tools/addon/portainer.sh)"
UPDATEEOF
  chmod +x /usr/local/bin/update_portainer
  msg_ok "Created update script (/usr/local/bin/update_portainer)"

  echo ""
  msg_ok "${APP} is reachable at: ${BL}https://${LOCAL_IP}:${DEFAULT_PORT}${CL}"
  echo ""
  msg_warn "On first access, you'll be prompted to create an admin account."
}

# ==============================================================================
# MAIN
# ==============================================================================

# Handle type=update (called from update script)
if [[ "${type:-}" == "update" ]]; then
  header_info
  if [[ -f "$COMPOSE_FILE" ]]; then
    update
  else
    msg_error "${APP} is not installed. Nothing to update."
    exit 233
  fi
  exit 0
fi

header_info
get_lxc_ip

# Check if already installed
if [[ -f "$COMPOSE_FILE" ]]; then
  msg_warn "${APP} is already installed."
  echo ""

  echo -n "${TAB}Uninstall ${APP}? (y/N): "
  read -r uninstall_prompt
  if [[ "${uninstall_prompt,,}" =~ ^(y|yes)$ ]]; then
    uninstall
    exit 0
  fi

  echo -n "${TAB}Update ${APP}? (y/N): "
  read -r update_prompt
  if [[ "${update_prompt,,}" =~ ^(y|yes)$ ]]; then
    update
    exit 0
  fi

  msg_warn "No action selected. Exiting."
  exit 0
fi

# Fresh installation
msg_warn "${APP} is not installed."
echo ""
echo -e "${TAB}${INFO} This will install:"
echo -e "${TAB}  - Portainer (via Docker Compose)"
echo ""

echo -n "${TAB}Install ${APP}? (y/N): "
read -r install_prompt
if [[ "${install_prompt,,}" =~ ^(y|yes)$ ]]; then
  install
else
  msg_warn "Installation cancelled. Exiting."
  exit 0
fi