#!/usr/bin/env bash

# ─< Check if the given command exists silently >─────────────────────────────────────────
command_exists() {
  command -v "$@" >/dev/null 2>&1
}

# WHY:
# This import will give you the following variables:
# _sudo="sudo -E" <- only if non root user
# distro = <distro name, like 'arch', 'debian', 'fedora'..>
# arch = bool
# fedora = bool
# opensuse =  bool....
# You can then use it for, `if $arch; then`
# Also this gives you the _install command, which installs a package pased on the packagemanager/distro used.
# CAUTION:
# This only wokrs for generic package names, like neovim, or vim, or tmux etc..
# not every package packagemanager has the same packagenames for their packages..
getImports() {
  local url="$1"
  local import="$(mktemp)"

  # ─< if $1 is a local file, source this one instead >─────────────────────────────────────
  if [ -f "$url" ]; then
    source "$url"
    sleep 0.1
    return 0
  else
    # ─< if $1 is a url, grab it and source it, also deletes afterwards >─────────────────────
    if command_exists curl; then
      curl -fsSL $url -o $import
    elif command_exists wget; then
      wget -o $import $url
    else
      echo "curl/wget is required, but missing.."
      exit 69
    fi

    source "$import"
    echo_info "Sourcing external script:${NC} $url"
    sleep 0.1
    rm -f "$import"
  fi
}

init_docker() {
  if command_exists docker; then
    if confirm "Docker was installed correctly. Do you want to add $(whoami) to the docker group? (y/n)"; then
      $_sudo usermod -aG docker "$(whoami)"
    fi

    # spin and run
    spin bold grey "Enabling docker service.."
    if run --err err $_sudo systemctl enable --now docker; then
      check "Docker service is enabled!"
    else
      throw "Could not setup the service.."
      echo_error "${err:-}"
    fi

    echo_info "$(whoami) is now part of the docker group. Restart your session to enable the changes. Also docker was addet as a service. Should autostart from now on."
  else
    echo_error "Something went wrong!"
  fi
}

_arch() {
  local err
  # run _install docker docker-compose --noconfirm

  # spin blue bold "Executing arch.."
  # sleep 1.3

  spin bold grey "Executing arch.. installing $PACKAGE"
  if run --err err _install docker docker-compose --noconfirm; then
    check "Docker was installed"
  else
    throw "Could not install docker"
    echo_error "${err:-}"
  fi
}

_debian() {
  if ! $trixie; then
    echo_info "executing debian"
    sleep 1.3
    run $_sudo apt-get update &&
      run $_sudo apt-get install -y ca-certificates curl &&
      run $_sudo install -m 0755 -d /etc/apt/keyrings &&
      run $_sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc &&
      run $_sudo chmod a+r /etc/apt/keyrings/docker.asc &&
      sleep 0.5
    if [ "$VERSION_CODENAME" == "trixie" ]; then
      VERSION_CODENAME="bookworm"
    fi
    echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
    $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | $_sudo tee /etc/apt/sources.list.d/docker.list >/dev/null

    echo_info "Addet repository. Updating and installing now.."
    sleep 1
    run $_sudo apt-get update
    run checkAndInstall "docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin"
  else
    echo_info "executing trixie.."
    run _install docker.io docker-compose
  fi
}

_ubuntu() {
  echo_info "executing ubuntu"
  sleep 2
  run $_sudo apt-get update &&
    run $_sudo apt-get install -y ca-certificates curl &&
    run $_sudo install -m 0755 -d /etc/apt/keyrings &&
    run $_sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc &&
    run $_sudo chmod a+r /etc/apt/keyrings/docker.asc
  echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
    $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | $_sudo tee /etc/apt/sources.list.d/docker.list >/dev/null

  echo_info "Addet repository. Updating and installing now.."
  sleep 0.5
  run $_sudo apt-get update
  run checkAndInstall "docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin"
}

_fedora() {
  echo_info "executing fedora"
  sleep 2
  run _install dnf-plugins-core
  run $_sudo dnf config-manager --add-repo https://download.docker.com/linux/fedora/docker-ce.repo
  run checkAndInstall "docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin"
}

main() {
  case "$distro" in
  arch) _arch ;;
  debian) _debian ;;
  ubuntu) _ubuntu ;;
  fedora) _fedora ;;
  *) echo "$distro is not supported by this script" ;;
  esac
}

if getImports "https://git.k4li.de/scripts/beddu/raw/branch/main/dist/beddu.sh" && getImports "https://git.k4li.de/scripts/imports/raw/branch/main/distros.sh"; then
  # ─< package variable >───────────────────────────────────────────────────────────────────
  unset PACKAGE

  # ─< argument list variables >────────────────────────────────────────────────────────────
  silent=false

  sleep 0.1

  PACKAGE=docker
  if command_exists "$PACKAGE"; then
    echo_warning "$PACKAGE is already installed!"
    echo_warning "Exiting now!"
    exit 69
  fi

  # ─< parse arguments and get variable contents >──────────────────────────────────────────
  for arg in "$@"; do
    case "$arg" in
    --silent | -s)
      export silent=true
      ;;
    esac
  done

  if main; then
    init_docker
  fi
fi