#include "Move.hpp"

#include <ostream>

Move::Move(const Square &from, const Square &to, const std::optional<PieceType> &promotion)
        : mFrom(from), mTo(to), mPromotion(promotion) {
}

Move::Optional Move::fromUci(const std::string &uci) {
    if (uci.length() < 4 || uci.length() > 5)
        return std::nullopt;

    std::optional<PieceType> promotion = std::nullopt;
    if (uci.length() == 5) {
        promotion = Piece::pieceTypeFromSymbol(uci[4]);
        if (!promotion.has_value()) {
            return std::nullopt;
        }
    }

    auto from = Square::fromName(uci.substr(0, 2));
    auto to = Square::fromName(uci.substr(2, 2));
    if (!from.has_value() || !to.has_value())
        return std::nullopt;

    return Move(from.value(), to.value(), promotion);
}

Square Move::from() const {
    return mFrom;
}

Square Move::to() const {
    return mTo;
}

std::optional<PieceType> Move::promotion() const {
    return mPromotion;
}

std::ostream &operator<<(std::ostream &os, const Move &move) {
    (void) move;
    return os;
}

bool operator<(const Move &lhs, const Move &rhs) {
    (void) lhs;
    (void) rhs;
    return false;
}

bool operator==(const Move &lhs, const Move &rhs) {
    return lhs.from() == rhs.from()
            && lhs.to() == rhs.to()
            && lhs.promotion() == rhs.promotion();
}