// Solutions to the Advent Of Code 2024.
// Copyright (C) 2024  Stefan Müller
//
// This program is free software: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation, either version 3 of the License, or (at your option) any later
// version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with
// this program.  If not, see <http://www.gnu.org/licenses/>.

#include <aoc/Point2.hpp>

const Point2 Point2::left{ -1, 0 };
const Point2 Point2::right{ 1, 0 };
const Point2 Point2::up{ 0, -1 };
const Point2 Point2::down{ 0, 1 };
const Point2 Point2::upLeft{ -1, -1 };
const Point2 Point2::upRight{ 1, -1 };
const Point2 Point2::downLeft{ -1, 1 };
const Point2 Point2::downRight{ 1, 1 };
const std::array<Point2, 8> Point2::directions = { Point2::down, Point2::downRight, Point2::right, Point2::upRight,
    Point2::up, Point2::upLeft, Point2::left, Point2::downLeft };
const std::array<Point2, 4> Point2::cardinalDirections = { Point2::down, Point2::right, Point2::up, Point2::left };

Point2 Point2::getCardinalDirection(const char directionChar)
{
    switch (directionChar)
    {
        case 'v' :
            return Point2::down;
        case '>' :
            return Point2::right;
        case '^' :
            return Point2::up;
        case '<' :
            return Point2::left;
        default :
            return { 0, 0 };
    }
}


Point2::Point2()
    : Point2{ 0, 0 }
{
}

Point2::Point2(const int x, const int y)
    : x{ x }, y{ y }
{
}

bool Point2::operator==(const Point2& rhs) const
{
    return x == rhs.x && y == rhs.y;
}

bool Point2::operator!=(const Point2& rhs) const
{
    return !(*this == rhs);
}

bool Point2::operator<(const Point2& rhs) const
{
    return x < rhs.x || (x == rhs.x && y < rhs.y);
}

Point2 Point2::operator+(const Point2& rhs) const
{
    return Point2(x + rhs.x, y + rhs.y);
}

Point2 Point2::operator-(const Point2& rhs) const
{
    return Point2(x - rhs.x, y - rhs.y);
}

Point2 Point2::operator*(const int rhs) const
{
    return Point2(x * rhs, y * rhs);
}

Point2 Point2::operator-() const
{
    return Point2(-x, -y);
}

Point2& Point2::operator+=(const Point2& rhs)
{
    *this = *this + rhs;
    return *this;
}

Point2& Point2::operator-=(const Point2& rhs)
{
    *this = *this - rhs;
    return *this;
}

Point2& Point2::operator*=(const int rhs)
{
    *this = *this * rhs;
    return *this;
}

int& Point2::operator[](size_t coordinateIndex)
{
    return coordinateIndex == 0 ? x : y;
}

std::ostream& operator<<(std::ostream& os, const Point2& rhs)
{
    os << "(" << rhs.x << ", " << rhs.y << ")";
    return os;
}