#!/bin/sh -e

# ANSI color codes
RED='\033[0;31m'
CYAN='\033[0;36m'
YELLOW='\033[0;33m'
LIGHT_GREEN='\033[0;92m'
BOLD='\033[1m'
NC='\033[0m' # No Color

echo_error() {
  printf "${BOLD}${RED}ERROR: ${NC}${RED}%s${NC}\n" "$1" >&2
}

echo_info() {
  printf "${BOLD}${CYAN}INFO: ${NC}${CYAN}%s${NC}\n" "$1"
}

echo_warning() {
  printf "${BOLD}${YELLOW}WARNING: ${NC}${YELLOW}%s${NC}\n" "$1"
}

echo_note() {
  printf "${BOLD}${LIGHT_GREEN}NOTE: ${NC}${LIGHT_GREEN}%s${NC}\n" "$1"
}

# ─< Silent execution >─────────────────────────────────────────────────────────────────
silentexec() {
  "$@" >/dev/null 2>&1
}

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

# Check if the user is root and set sudo variable if necessary
check_root() {
  if [ "$(id -u)" -ne 0 ]; then
    if command_exists sudo; then
      echo_note "User is not root. Using sudo for privileged operations."
      _sudo="sudo"
    else
      echo_error "No sudo found and you're not root! Can't install packages."
      return 1
    fi
  else
    echo_note "Root access confirmed."
    _sudo=""
  fi
}

flatpak_init() {
  if command_exists flatpak; then
    echo_info "Flatpak exists, initializing flathub repository!"
    flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
  else
    echo_error "Flatpak was not found!"
  fi
}

inst_arch() {
  echo_note "Using Arch script, btw!"

  if command_exists yay; then
    i_arch="yay"
  elif command_exists paru; then
    i_arch="paru"
  elif command_exists pacman; then
    i_arch="$_sudo pacman"
  fi

  if [ -n "$i_arch" ]; then
    i_arch -S flatpak
  else
    echo_error "No packager for installation found.. (not even pacman...)"
  fi

}

inst_debian() {
  echo_note "Using Debian script!"
  if command_exists nala; then
    $_sudo nala update
    $_sudo nala install flatpak -y
  elif command_exists apt-get; then
    echo_info "Couldn't find nala, falling back to apt-get"
    $_sudo apt-get update
    $_sudo apt-get install flatpak -y
  fi
}

inst_ubuntu() {
  echo_note "Using Ubuntu script!"
  if command_exists nala; then
    $_sudo nala update
    $_sudo nala install flatpak -y
  elif command_exists apt-get; then
    echo_info "Couldn't find nala, falling back to apt-get"
    $_sudo apt-get update
    $_sudo apt-get install flatpak -y
  fi
}

# ─< Distribution detection and installation >────────────────────────────────────────
get_packager() {
  if [ -e /etc/os-release ]; then
    echo_info "Detecting distribution..."
    . /etc/os-release

    # Convert $ID and $ID_LIKE to lowercase
    ID=$(printf "%s" "$ID" | tr '[:upper:]' '[:lower:]')
    ID_LIKE=$(printf "%s" "$ID_LIKE" | tr '[:upper:]' '[:lower:]')

    case "$ID" in
    ubuntu | pop) inst_ubuntu ;;
    debian) inst_debian ;;
    fedora) inst_fedora ;;
    alpine) inst_alpine ;;
    arch | manjaro | garuda | endeavour) inst_arch ;;
    opensuse*) inst_opensuse ;;
    *)
      # Use standard [ ] syntax for string matching
      if [ "${ID_LIKE#*debian}" != "$ID_LIKE" ]; then
        inst_debian
      elif [ "${ID_LIKE#*ubuntu}" != "$ID_LIKE" ]; then
        inst_ubuntu
      elif [ "${ID_LIKE#*arch}" != "$ID_LIKE" ]; then
        inst_arch
      elif [ "${ID_LIKE#*fedora}" != "$ID_LIKE" ]; then
        inst_fedora
      elif [ "${ID_LIKE#*suse}" != "$ID_LIKE" ]; then
        inst_opensuse
      else
        echo_error "Unsupported distribution: $ID"
        exit 1
      fi
      ;;
    esac
  else
    echo_error "Unable to detect distribution. /etc/os-release not found."
    exit 1
  fi
}

install_flatpak() {
  check_root &&
    get_packager &&
    flatpak_init
}

install_flatpak