#include "Bishop.h"
#include "Position.h"
#include <utility>
#include <stdexcept>
#include <iostream>


Bishop::Bishop(Position pos, char c) {
    if (c != 'B' and c != 'W')
        throw std::invalid_argument("Impossible color of figure!");
    position = pos;
    color = c;
}

Figure* Bishop::copy()
{
    static Bishop b(position, color);
    Figure* f = &b;
    return f;
}

vector<Position> Bishop::get_moves()
{
    // У ладьи всегда 14 ходов, если нет преград
    vector<Position> moves;
    for(int i = 1; i < 8; i++) {
        for(int j = -1; j < 2; j+=2) {
            for(int k = -1; k < 2; k+=2) {
                // Не добавляем невозможные ходы
                if (not (position.posSym + i*j <= 'H' and position.posNum + i*k <= '8' and position.posSym + i*j >= 'A' and position.posNum + i*k >= '1')) 
                    continue;
                // Position создаст ошибку, если создать невозможный ход
                Position p;
                try {
                    p = Position((char)(position.posSym+i*j), (char)(position.posNum+i*k));
                }
                catch (const std::invalid_argument) {
                    continue;
                }
                moves.push_back(p);
            }
        }
    }
    return moves;
}

const char* Bishop::print()
{
    const char* me;
    if (color == 'B')
        me = "♝";
    else
        me = "♗";
    return me;
}