#!/usr/bin/env bash

# This is an example bot for the game Tui48.
# All it does is print out some information,
# and then it chooses a random action for
# the game to do.

# To use this bot, you can pass the path to
# this file to Tui48:
# $: tui48 --bot <PATH_TO_THIS_FILE> --bot-file /tmp/bot-file

# If it wasn't already clear, this script was written with Linux in mind,
# but you can easily port this to Windows. This script is just here to serve
# as documentation and a demo.

# Arguments:
#   1: The path for the bot file. (This is where the final chosen action is written.)
#   2: How many tiles are in a row, and how many rows are in the board?
#   3: The current game score.
#   4..: All the tile values. (0 == Empty Tile)

file_path="$1"
tile_count="$2"
game_score="$3"
shift 3 # Shift over all the command arguments. (The first tile is now argument 1.)

echo "Bot File Path: '$file_path'"
echo "Tile Count: $tile_count"
echo "Game Score: $game_score"

# This syntax is a bit confusing, but it is essentially just
# printing out all the tile values and their position on the board.
for i in $(seq 1 $(( ${tile_count} * ${tile_count} ))); do
    row=$(( $(( ${i} - 1 )) / ${tile_count} ))
    col=$(( $(( ${i} - 1 )) % ${tile_count} ))

    echo -n "(${col}, ${row}) = "

    if [[ "$1" == "0" ]]; then
        echo "EMPTY"
    else
        echo "$1"
    fi

    shift 1
done

actions=(
    "up"
    "down"
    "left"
    "right"
)

# Choose a random action.
chosen_action=${actions[$(( ${RANDOM} % ${#actions[@]} ))]}

echo "Chosen Action: '${chosen_action}'"

# Save that action to the bot file.
echo "${chosen_action}" > "${file_path}"