#!/usr/bin/env miaou-bash

# CONSTANTS

readonly AZERTY_ZONES=(
  'Europe/Paris'
  'Indian/Reunion'
  'Indian/Mayotte'
  'America/Cayenne'
  'America/Guadeloupe'
  'America/Martinique'
  'Pacific/Noumea'
  'Pacific/Tahiti'
)
readonly REQUIRED_PKGS=(file jq vim git)
readonly BACKUP='ORIGINAL'

# FUNCTIONS

function required_packages {
  "$MIAOU_BASH_DIR/tools/idem_apt_install" "${REQUIRED_PKGS[@]}"
}

function no_more_skeleton {
  if [[ -e /etc/skel/.bashrc ]]; then
    rm /etc/skel/.bashrc
    echo "skeleton .bashrc removed!"
  fi
}

function link_etc {
  local filename="$1" subfolder="${2:-}"
  local link_name="$filename"
  [[ -v LINK_NAME ]] && link_name="$LINK_NAME"

  local source="$MIAOU_BASH_DIR/etc"
  local destination="/etc"
  [[ -n "$subfolder" ]] && source+="/${subfolder}" && destination+="/${subfolder}"
  if [[ -L "$destination/$link_name" ]]; then
    if [[ "$(readlink "$destination/$link_name")" != "$source/$filename" ]]; then
      ln -sf "$source/$filename" "$destination/$link_name"
      echo "link $source/$link_name updated"
    fi
  else
    if [[ -f "$destination/$link_name" ]]; then
      mv "$destination/$link_name" "$destination/$link_name.$BACKUP"
      echo "$destination/$link_name.$BACKUP saved!"
    fi
    ln -s "$source/$filename" "$destination/$link_name"
    echo "link $source/$link_name created"
  fi
}

function link_config_files {
  link_etc bash.bashrc
  link_etc inputrc

  [[ "$DISTRO_LIKE" == 'arch' ]] && mkdir -p /etc/vim
  link_etc vimrc.core vim
  link_etc vimrc.miaou vim
  link_etc vimrc.rookie vim

  if in_azerty_zone 2>/dev/null; then
    link_etc vimrc.azerty vim
    LINK_NAME=vimrc.local link_etc vimrc.local.azerty vim
  else
    link_etc vimrc.local vim
  fi
}

function in_azerty_zone {
  local zone
  zone=$(readlink /etc/localtime)
  zone="${zone#/usr/share/zoneinfo/}" # remove prefix
  for i in "${AZERTY_ZONES[@]}"; do [[ "$zone" == "$i" ]] && return 0; done
  return 1
}

# MAIN

[ "$UID" -ne 0 ] && echo 'root privilege required' && exit 1
source "$MIAOU_BASH_DIR/lib/functions.bash"
DISTRO_LIKE=$(fetch_distro_like)

required_packages
no_more_skeleton
link_config_files