#!/usr/bin/env miaou-bash

PREFIX_NESTED="__nested__"
INSPECT_SIMPLE='-> '
INSPECT_NESTED='=> '
INSPECT_END='~~~~'

function array_new {
  ref_name="$1"
  shift
  [[ -v nested_count ]] && ((nested_count++)) || nested_count=1
  nested_name="${PREFIX_NESTED}$nested_count"
  declare -ga "$nested_name"
  declare -gn "$ref_name"="$nested_name"
  local -n internal="$nested_name"
  internal+=("$@")
}

function array_inspect {
  local ref prefix i
  declare -n ref="$1"
  prefix="${2:-}"
  echo "${prefix}array '$1' contains ${#ref[@]} elements"
  for i in "${ref[@]}"; do
    if [[ -R $i ]]; then
      array_inspect "$i" "${prefix}${INSPECT_NESTED}"
    else
      echo "${prefix}${INSPECT_SIMPLE}${i}"
    fi
  done
  echo "${prefix}${INSPECT_END}"
}

# initialization
array_new mine1 'Albert Dupontel' 20
array_new mine2 'Bob Sinclar' 24
array_new mine3 'Conrad Ademayor' 31 true
array_new nested mine1 mine2 mine3
array_inspect nested

# change values
mine1+=(false)
mine3[1]=$((mine3[1] + 8))
mine3[2]=false
array_inspect nested

# nested twice
declare -n other="${nested[1]:?}" # ':?' fix shellcheck issue
array_inspect other
array_new mine4 'Darryl' 30
other+=(mine4)
array_inspect nested

# CAN'T PREVENT LOOP!
# other+=(nested)
# array_inspect nested