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#pragma once
#include <array>
#include <functional>
#include <list>
#include <queue>
#include <vector>
#include "euclidean.hpp"
#include "octree.hpp"
#include "quantity.hpp"
#include "spin.hpp"
#include "random.hpp"
#include "transformation.hpp"
template <class U, int D, class R, class S> class Model;
template <class U, int D, class R, class S> class measurement {
public:
virtual void pre_cluster(const Model<U, D, R, S>&, unsigned, const R&){};
virtual void plain_bond_visited(const Model<U, D, R, S>&, const Spin<U, D, S>*,
const Spin<U, D, S>*, const Spin<U, D, S>&, double){};
virtual void plain_site_transformed(const Model<U, D, R, S>&, const Spin<U, D, S>*,
const Spin<U, D, S>&){};
virtual void ghost_bond_visited(const Model<U, D, R, S>&, const Spin<U, D, S>&,
const Spin<U, D, S>&, double){};
virtual void ghost_site_transformed(const Model<U, D, R, S>&, const R&){};
virtual void post_cluster(const Model<U, D, R, S>&){};
};
template <class U, int D, class R, class S> class Model {
public:
U L;
R s0;
std::vector<Spin<U, D, S>*> s;
Octree<U, D, S> dict;
std::function<double(const Spin<U, D, S>&, const Spin<U, D, S>&)> Z;
std::function<double(const Spin<U, D, S>&)> B;
Rng rng;
Model(U L, std::function<double(const Spin<U, D, S>&, const Spin<U, D, S>&)> Z,
std::function<double(const Spin<U, D, S>&)> B)
: L(L), s0(L), Z(Z), B(B), rng(), dict(L, std::floor(L)) {}
void step(double T, Transformation<U, D, R, S>* t0, measurement<U, D, R, S>& A) {
std::queue<Transformation<U, D, R, S>*> queue;
queue.push(t0);
std::set<Spin<U, D, S>*> visited;
while (!queue.empty()) {
Transformation<U, D, R, S>* t = queue.front();
queue.pop();
std::set<Spin<U, D, S>*> c = t->current();
if (!std::any_of(c.begin(), c.end(), [&visited](Spin<U, D, S>* s) { return visited.contains(s); })) {
visited.insert(c.begin(), c.end());
for (Spin<U, D, S>* s : t->toConsider()) {
double ΔE = t->ΔE(s);
if (ΔE > 0 && 1.0 - exp(-ΔE / T) > rng.uniform<double>(0, 1)) {
queue.push(t->createNew(T, visited, s, rng));
}
}
t->apply();
}
delete t;
}
}
void resize(double T, double P) {}
void wolff(double T, std::vector<Gen<U, D, R, S>> gs,
measurement<U, D, R, S>& A, unsigned N) {
for (unsigned i = 0; i < N; i++) {
Gen<U, D, R, S>& g = rng.pick(gs);
Transformation<U, D, R, S> *t = g(*this, rng);
this->step(T, t, A);
A.post_cluster(*this);
}
}
};
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