#include "../rng.h"
#include "./rngtest.h"

namespace splat {
    class runs_test : public RNGTEST {
        public: 
        runs_test(std::vector<std::bitset<32>> &testData) : RNGTEST(testData) {
            testPValue = runTest(data);
            testPassed = testPValue > 0.01;
        }
        std::string getName() override {
            return "Runs";
        }
        double runTest(std::vector<std::bitset<32>> &data) override {
            long long totalSize = data.size() * 32;

            double vnobs = 1;

            double onesproportion = 0;

            for(int i=0; i<totalSize-1; i++){

                if(data[i/32][i%32]!=data[(i+1)/32][(i+1)%32]){
                    vnobs++;
                }
                onesproportion+=data[i/32][i%32];
            }

            onesproportion/=totalSize;

            return std::erfc(
                std::abs(vnobs-(2*totalSize*onesproportion*(1-onesproportion)))
                /
                (2*std::sqrt(2*totalSize)*onesproportion*(1-onesproportion))
            );
        }
    };
}