#!/bin/bash

# Defaults
FEAT_COUNT=1
SUCCESS_COUNT=0

# Help function
show_help() {
    echo "Usage: $0 [FEAT_DICE] [SUCCESS_DICE]"
    echo ""
    echo "Arguments:"
    echo "  FEAT_DICE     Number of 1d12 Feat Dice to roll (default: 1)"
    echo "  SUCCESS_DICE  Number of 1d6 Success Dice to roll (default: 0)"
    echo ""
    echo "Options:"
    echo "  -h, --help    Show this help message"
    echo ""
    echo "Examples:"
    echo "  $0          # Rolls 1 Feat Die"
    echo "  $0 1 3      # Rolls 1 Feat Die and 3 Success Dice"
    echo "  $0 2 0      # Rolls 2 Feat Dice"
    exit 0
}

# Check for help flag
if [[ "$1" == "-h" || "$1" == "--help" ]]; then
    show_help
fi

# Check for arguments
if [[ "$1" =~ ^[0-9]+$ ]]; then
    FEAT_COUNT=$1
    if [[ "$2" =~ ^[0-9]+$ ]]; then
        SUCCESS_COUNT=$2
    fi
fi

# Colors and formatting
BOLD='\033[1m'
RED='\033[31m'
GREEN='\033[32m'
CYAN='\033[36m' # Using Cyan for Gandalf as it's bright/distinct
RESET='\033[0m'

# Function to generate a random number between 1 and max
roll() {
    local max=$1
    # Read 2 bytes from /dev/urandom, convert to decimal, modulo max, add 1
    # This provides better randomness than $RANDOM
    val=$(od -An -N2 -tu2 /dev/urandom)
    echo $(( (val % max) + 1 ))
}

echo -e "${BOLD}Rolling for The One Ring...${RESET}\n"

TOTAL=0

# Roll Feat Dice (1d12)
if [ "$FEAT_COUNT" -gt 0 ]; then
    echo -n -e "Feat Dice (${FEAT_COUNT}d12): "
    for ((i=0; i<FEAT_COUNT; i++)); do
        RESULT=$(roll 12)
        ((TOTAL+=RESULT))
        
        if [ "$RESULT" -eq 1 ]; then
            # Eye of Mordor
            echo -n -e "[ ${BOLD}${RED}1 (EYE)${RESET} ] "
        elif [ "$RESULT" -eq 12 ]; then
            # Gandalf
            echo -n -e "[ ${BOLD}${CYAN}12 (GANDALF)${RESET} ] "
        else
            echo -n "[ $RESULT ] "
        fi
    done
    echo ""
fi

# Roll Success Dice (1d6)
if [ "$SUCCESS_COUNT" -gt 0 ]; then
    echo -n -e "Success Dice (${SUCCESS_COUNT}d6): "
    for ((i=0; i<SUCCESS_COUNT; i++)); do
        RESULT=$(roll 6)
        ((TOTAL+=RESULT))
        
        if [ "$RESULT" -eq 6 ]; then
            # Magnificent Outcome
            echo -n -e "[ ${BOLD}${GREEN}6 (MAGNIFICENT)${RESET} ] "
        else
            echo -n "[ $RESULT ] "
        fi
    done
    echo ""
fi

echo -e "\n${BOLD}Total Face Value: $TOTAL${RESET}"