ai.h

#ifndef AI_H_
#define AI_H_

#include <string>

// AI agents for connect 4.
// Each agent corresponds a function. AI functions assume that the board
// is not full and may crash the game if given an invalid board state.
// This file also defines the main types of players (including human),
// and the strings used in command-line flags to pick player types.

enum class PlayerType { kHuman, kRandom, kFirst, kInvalid };


// AI chooses first open space.
// Corresponds to kFirst player type.
int FirstOpenAgent(int board[6][7], int ai_player);

// AI chooses a random open space.
// Corresponds to kRandom player type.
int RandomAgent(int board[6][7], int ai_player);

// String names of player types.
PlayerType GetPlayerType(const std::string &arg);

#endif