hive-ai-rando.js

"use strict";

/* 
hive-ai-rando.js
	"Rando[m]"
	This AI module just chooses a move at rando[m]
*/

function process_message( message ) {
	var response;
	switch( message.request_type ) {
		
		case "Greetings":
			response = {
				response_type: message.request_type,
				response_id: message.request_id
			};
			var package_json = require("./package.json");
			for( var key in package_json )
				response[key] = package_json[key];
			break;
		
		case "Choose Turn":
			var possible_turns = message.game_state.possible_turns;
			if( !has_nonzero_key_set_length( possible_turns ))
				throw "Cannot choose from empty object possible_turns";
			response = {
				response_type: message.request_type,
				response_id: message.request_id,
				game_id: message.game_id,
				turn_type: random_object_key( possible_turns )
			};
			switch( response.turn_type ) {
				case "Placement":
					response.piece_type = random_array_item( possible_turns[ response.turn_type ].piece_types );
					response.destination = random_array_item( possible_turns[ response.turn_type ].positions );
					break;
				case "Movement":
					response.source = random_object_key( possible_turns[ response.turn_type ]);
					response.destination = random_array_item( possible_turns[ response.turn_type ][ response.source ]);
					break;
				case "Special Ability":
					response.ability_user = random_object_key( possible_turns[ response.turn_type ]);
					response.source = random_object_key( possible_turns[ response.turn_type ][ response.ability_user ]);
					response.destination = random_array_item( possible_turns[ response.turn_type ][ response.ability_user ][ response.source ]);
					break;
				case "Forfeit":
					break;
			}
			break;
	}
	return response;
}

function has_nonzero_key_set_length( object ) {
	return( typeof object != "undefined" && object != null && Object.keys( object ).length > 0 );
}

function random_object_key( object ) {
	var keys = Object.keys( object );
	return keys[ random_int( 0, keys.length - 1 )];
}

function random_array_item( array ) {
	return array[ random_int( 0, array.length - 1 )];
}

function random_int( min, max ) {
	return Math.floor( Math.random() * (max - min + 1) ) + min;
}


// exports

exports.process_message = process_message;