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#include "ccrp.h"
#include <vector>
#include <iostream>
#include "tdict.h"
#include "transliterations.h"
using namespace std;
MT19937 rng;
static bool verbose = false;
struct Model {
Model() : bp(), base(0.2, 0.6) , ccrps(5, CCRP<int>(0.8, 0.5)) {}
double p0(int x) const {
assert(x > 0);
assert(x < 5);
return 1.0/4.0;
}
double llh() const {
double lh = bp + base.log_crp_prob();
for (int ctx = 1; ctx < 5; ++ctx)
lh += ccrps[ctx].log_crp_prob();
return lh;
}
double prob(int ctx, int x) const {
assert(ctx > 0 && ctx < 5);
return ccrps[ctx].prob(x, base.prob(x, p0(x)));
}
void increment(int ctx, int x) {
assert(ctx > 0 && ctx < 5);
if (ccrps[ctx].increment(x, base.prob(x, p0(x)), &rng)) {
if (base.increment(x, p0(x), &rng)) {
bp += log(1.0 / 4.0);
}
}
}
// this is just a biased estimate
double est_base_prob(int x) {
return (x + 1) * x / 40.0;
}
void increment_is(int ctx, int x) {
assert(ctx > 0 && ctx < 5);
SampleSet<double> ss;
const int PARTICLES = 25;
vector<CCRP<int> > s1s(PARTICLES, CCRP<int>(0.5,0.5));
vector<CCRP<int> > sbs(PARTICLES, CCRP<int>(0.5,0.5));
vector<double> sp0s(PARTICLES);
CCRP<int> s1 = ccrps[ctx];
CCRP<int> sb = base;
double sp0 = bp;
for (int pp = 0; pp < PARTICLES; ++pp) {
if (pp > 0) {
ccrps[ctx] = s1;
base = sb;
bp = sp0;
}
double q = 1;
double gamma = 1;
double est_p = est_base_prob(x);
//base.prob(x, p0(x)) + rng.next() * 0.1;
if (ccrps[ctx].increment(x, est_p, &rng, &q)) {
gamma = q * base.prob(x, p0(x));
q *= est_p;
if (verbose) cerr << "(DP-base draw) ";
double qq = -1;
if (base.increment(x, p0(x), &rng, &qq)) {
if (verbose) cerr << "(G0 draw) ";
bp += log(p0(x));
qq *= p0(x);
}
} else { gamma = q; }
double w = gamma / q;
if (verbose)
cerr << "gamma=" << gamma << " q=" << q << "\tw=" << w << endl;
ss.add(w);
s1s[pp] = ccrps[ctx];
sbs[pp] = base;
sp0s[pp] = bp;
}
int ps = rng.SelectSample(ss);
ccrps[ctx] = s1s[ps];
base = sbs[ps];
bp = sp0s[ps];
if (verbose) {
cerr << "SELECTED: " << ps << endl;
static int cc = 0; cc++; if (cc ==10) exit(1);
}
}
void decrement(int ctx, int x) {
assert(ctx > 0 && ctx < 5);
if (ccrps[ctx].decrement(x, &rng)) {
if (base.decrement(x, &rng)) {
bp -= log(p0(x));
}
}
}
double bp;
CCRP<int> base;
vector<CCRP<int> > ccrps;
};
int main(int argc, char** argv) {
if (argc > 1) { verbose = true; }
vector<int> counts(15, 0);
vector<int> tcounts(15, 0);
int points[] = {1,2, 2,2, 3,2, 4,1, 3, 4, 3, 3, 2, 3, 4, 1, 4, 1, 3, 2, 1, 3, 1, 4, 0, 0};
double tlh = 0;
double tt = 0;
for (int n = 0; n < 1000; ++n) {
if (n % 10 == 0) cerr << '.';
if ((n+1) % 400 == 0) cerr << " [" << (n+1) << "]\n";
Model m;
for (int *x = points; *x; x += 2)
m.increment(x[0], x[1]);
for (int j = 0; j < 24; ++j) {
for (int *x = points; *x; x += 2) {
if (rng.next() < 0.8) {
m.decrement(x[0], x[1]);
m.increment_is(x[0], x[1]);
}
}
}
counts[m.base.num_customers()]++;
tcounts[m.base.num_tables()]++;
tlh += m.llh();
tt += 1.0;
}
cerr << "mean LLH = " << (tlh / tt) << endl;
for (int i = 0; i < 15; ++i)
cerr << i << ": " << (counts[i] / tt) << "\t" << (tcounts[i] / tt) << endl;
}
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