#!/usr/bin/env bash
set -euo pipefail

pips=(Ace Two Three Four Five Six Seven Eight Nine Ten Page Knight Queen King)
suits=(Swords Cups Wands Coins)
majors=( \
    'The Fool' 'The Magician' 'The High Priestess' 'The Empress' 'The Emperor' 'The Hierophant' \
    'The Lovers' 'The Chariot' 'Strength' 'The Hermit' 'Wheel of Fortune' 'Justice' 'The Hanged Man' \
    'Death' 'Temperance' 'The Devil' 'The Tower' 'The Star' 'The Moon' 'The Sun' 'Judgment' 'The World' \
)

deck() {
    minors=()
    for pip in "${pips[@]}"; do
        for suit in "${suits[@]}"; do
            minors+=("$pip of $suit")
        done
    done
    arcana=( "${minors[@]}" "${majors[@]}" )
}

draw() {
    local num_cards=$1
    local allow_reversed=$2
    local drawn=()

    mapfile -t drawn < <(shuf -e -n "$num_cards" "${arcana[@]}")

    if [[ "$allow_reversed" == "true" ]]; then
        for i in "${!drawn[@]}"; do
            if (( RANDOM % 2 )); then
                drawn[$i]+=" Reversed"
            fi
        done
    fi

    for card in "${drawn[@]}"; do
        echo "$card"
    done
}

if [[ $# -lt 1 ]]; then
    echo "Usage: $0 [-r] <number_of_cards>"
    exit 1
fi

reversed_flag="false"

if [[ $1 == "-r" ]]; then
    reversed_flag="true"
    shift
fi

num_cards="$1"

deck
draw "$num_cards" "$reversed_flag"