#include "minecraft/world/level/ChunkPos.h"

#include <memory>
#include <string>

#include "util/StringHelpers.h"
#include "minecraft/world/entity/Entity.h"
#include "minecraft/world/level/TilePos.h"

ChunkPos::ChunkPos(int x, int z) : x(x), z(z) {}

int64_t ChunkPos::hashCode(int x, int z) {
    int64_t xx = x;
    int64_t zz = z;
    return (xx & 0xffffffffl) | ((zz & 0xffffffffl) << 32l);
}

int ChunkPos::hashCode() {
    int64_t hash = hashCode(x, z);
    int h1 = (int)(hash);
    int h2 = (int)(hash >> 32l);
    return h1 ^ h2;
}

double ChunkPos::distanceToSqr(std::shared_ptr<Entity> e) {
    double xPos = x * 16 + 8;
    double zPos = z * 16 + 8;

    double xd = xPos - e->x;
    double zd = zPos - e->z;

    return xd * xd + zd * zd;
}

double ChunkPos::distanceToSqr(double px, double pz) {
    double xPos = x * 16 + 8;
    double zPos = z * 16 + 8;

    double xd = xPos - px;
    double zd = zPos - pz;

    return xd * xd + zd * zd;
}

int ChunkPos::getMiddleBlockX() { return (x << 4) + 8; }

int ChunkPos::getMiddleBlockZ() { return (z << 4) + 8; }

TilePos ChunkPos::getMiddleBlockPosition(int y) {
    return TilePos(getMiddleBlockX(), y, getMiddleBlockZ());
}

std::string ChunkPos::toString() {
    return "[" + toWString<int>(x) + ", " + toWString<int>(z) + "]";
}

int64_t ChunkPos::hash_fnct(const ChunkPos& k) { return k.hashCode(k.x, k.z); }

bool ChunkPos::eq_test(const ChunkPos& x, const ChunkPos& y) {
    return x.x == y.x && x.z == y.z;
}