/* 
 * File:   Piece.cpp
 * Author: amr
 * 
 * Created on July 30, 2025, 9:21 PM
 */

#include "Piece.hpp"

Piece::~Piece() {
    return;
}

// because the Piece class is instantiated in another class using
// unique_ptr, non-pure virtual functions apparently *must*
// have definitions, or the linker freaks out
// so this is just a stub that does nothing. it doesn't matter
// because only the derived class versions should be called.

std::vector<Move> Piece::getLegalMoves(const Square &from, const Board &board) const {
    std::vector<Move> moveList;
    return moveList;
}

std::vector<Move> King::getLegalMoves(const Square &from, const Board &board) const {
    std::vector<Move> moveList;

}

std::vector<Move> Rook::getLegalMoves(const Square &from, const Board &board) const {
    std::vector<Move> moveList;
    const int directions[8][2] = {
        {-1, 0}, // Up
        {1, 0}, // Down
        {0, -1}, // Left
        {0, 1} // Right
    };
    for (auto& dir : directions) {
        int r = from.rank + dir[0];
        int f = from.file + dir[1];

        while (r >= 0 && r < 8 && f >= 0 && f < 8) {
            const auto& target = board[r][f];

            if (!target) {
                moves.push_back({from,
                    {r, f}});
            } else if (target->color != this->color) {
                moves.push_back({from,
                    {r, f}});
                break;
            } else {
                break;
            }

            r += dir[0];
            f += dir[1];
        }
    }

    // calculate legal moves somehow
    return moveList;
}