/*
 * Copyright (C) the FFLAS-FFPACK group
 * Written by Clément Pernet
 *            Brice Boyer (briceboyer) <boyer.brice@gmail.com>
 * This file is Free Software and part of FFLAS-FFPACK.
 *
 * ========LICENCE========
 * This file is part of the library FFLAS-FFPACK.
 *
 * FFLAS-FFPACK is free software: you can redistribute it and/or modify
 * it under the terms of the  GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * ========LICENCE========
 *.
 */

// #ifndef NEWINO
// #define NEWWINO
// #endif

// #define WINOTHRESHOLD 100
// #define OLD_DYNAMIC_PEELING

#define ENABLE_CHECKER_fgemm 1

#include "fflas-ffpack/fflas-ffpack-config.h"

#include <iomanip>
#include <iostream>

#include <givaro/modular.h>

#include <recint/rint.h>

#include "fflas-ffpack/utils/timer.h"
#include "fflas-ffpack/fflas/fflas.h"

#include "fflas-ffpack/utils/args-parser.h"
#include "fflas-ffpack/utils/test-utils.h"

#include <random>

using namespace std;
using namespace FFLAS;
using namespace FFPACK;

using Givaro::Modular;
using Givaro::ModularBalanced;


// checks that D = alpha . C + beta . A ^ta * B ^tb
template<class Field>
bool check_MM(const Field                   & F,
              const typename Field::Element_ptr  Cd, // c0
              enum FFLAS_TRANSPOSE   & ta,
              enum FFLAS_TRANSPOSE   & tb,
              const size_t                    m,
              const size_t                    n,
              const size_t                    k,
              const typename Field::Element & alpha,
              const typename Field::Element_ptr  A, size_t lda,
              const typename Field::Element_ptr  B, size_t ldb,
              const typename Field::Element & beta,
              const typename Field::Element_ptr C, size_t ldc)
{
    bool wrong = false;

    typedef typename Field::Element Element;
    typedef typename Field::Element_ptr Element_ptr;
    typedef typename Field::ConstElement_ptr ConstElement_ptr;
    Element tmp;
    ConstElement_ptr ail,blj;
    Element_ptr D  = fflas_new (F,m,n);
    fassign(F,m,n,Cd,n,D,n);

    for (size_t i = 0; i < m; ++i)
        for (size_t j = 0; j < n; ++j){
            F.mulin(*(D+i*n+j),beta);
            F.assign (tmp, F.zero);
            for ( size_t l = 0; l < k ; ++l ){
                if ( ta == FflasNoTrans )
                    ail = A+i*lda+l;
                else
                    ail = A+l*lda+i;
                if ( tb == FflasNoTrans )
                    blj = B+l*ldb+j;
                else
                    blj = B+j*ldb+l;
                F.axpyin (tmp, *ail, *blj);
            }
            F.axpyin (*(D+i*n+j), alpha, tmp);
            if ( !F.areEqual( *(D+i*n+j), *(C+i*ldc+j) ) ) {
                wrong = true;
            }
        }
    if ( wrong ){
        size_t ici = 20 ;
        std::cerr<<"FAIL"<<std::endl;
        std::cerr << "a   :" << alpha<<", b   : " << beta << std::endl;
        std::cerr << "m   :" << m   << ", n   : " <<  n  << ", k   : " << k << std::endl;
        std::cerr << "ldA :" << lda << ", ldB : " << ldb << ", ldC : " << ldc << std::endl;
        for (size_t i=0; i<m && ici; ++i){
            for (size_t j =0; j<n && ici; ++j)
                if (!F.areEqual( *(C+i*ldc+j), *(D+i*n+j) ) ) {
                    std::cerr<<"Error C["<<i<<","<<j<<"]="
                    <<(*(C+i*ldc+j))<<" D["<<i<<","<<j<<"]="
                    <<(*(D+i*n+j))<<std::endl;
                    ici--;
                }
        }
        if (m<80 && n<80) {
            for (size_t i=0; i<m ; ++i){
                for (size_t j =0; j<n ; ++j) {
                    if ( !F.areEqual( *(C+i*ldc+j), *(D+i*n+j) ) )
                        std::cout << 'X' ;
                    else
                        std::cout << '.' ;
                }
                std::cout << std::endl;
            }
        }
    }
    // else std::cout<<"COOL"<<std::endl;

    fflas_delete (D);

    return !wrong ;

}


template<class Field, class RandIter>
bool launch_MM(const Field & F,
               const size_t   m,
               const size_t   n,
               const size_t   k,
               const typename Field::Element alpha,
               const typename Field::Element beta,
               const size_t ldc,
               const size_t lda,
               enum FFLAS_TRANSPOSE    ta,
               const size_t ldb,
               enum FFLAS_TRANSPOSE    tb,
               size_t iters,
               int nbw,
               bool par,
               RandIter& G)
{

    bool ok = true;

    typedef typename Field::Element_ptr Element_ptr;
    Element_ptr A ;
    Element_ptr B ;
    Element_ptr C = fflas_new (F,m,ldc);
    FFLASFFPACK_check(ldc >= n);
    fzero(F,m,n,C,ldc);
    Element_ptr D = fflas_new (F, m, n);
    for(size_t i = 0;i<iters;++i){
        if (ta == FflasNoTrans) {
            FFLASFFPACK_check(lda >= k);
            A = fflas_new (F, m, lda);
            fzero(F,m,lda,A,lda);
            RandomMatrix(F, m, k, A, lda, G);
        }
        else {
            FFLASFFPACK_check(lda >= m);
            A = fflas_new (F, k, lda);
            fzero(F,k,lda,A,lda);
            RandomMatrix (F, k, m, A, lda, G);
        }
        if (tb == FflasNoTrans) {
            FFLASFFPACK_check(ldb >= n);
            B = fflas_new (F,k,ldb);
            fzero(F,k,ldb,B,ldb);
            RandomMatrix (F, k, n, B, ldb, G);
        }
        else {
            FFLASFFPACK_check(ldb >= k);
            B = fflas_new (F,n,ldb);
            fzero(F,n,ldb,B,ldb);
            RandomMatrix (F, n, k, B, ldb, G);
        }
        RandomMatrix (F, m, n, C, ldc, G);
        fassign(F,m,n,C,ldc,D,n);
        if (par){
            MMHelper<Field,MMHelperAlgo::Auto, typename ModeTraits<Field>::value, ParSeqHelper::Parallel<CuttingStrategy::Recursive,StrategyParameter::ThreeDAdaptive> > WH (F, nbw);
            PAR_BLOCK{
                fgemm (F, ta, tb,m,n,k,alpha, A,lda, B,ldb, beta,C,ldc,WH);
            }
        }else{
            MMHelper<Field,MMHelperAlgo::Auto,typename ModeTraits<Field>::value> WH(F,nbw,ParSeqHelper::Sequential());
            fgemm (F, ta, tb,m,n,k,alpha, A,lda, B,ldb, beta,C,ldc,WH);
        }
        ok = ok && check_MM(F, D, ta, tb,m,n,k,alpha, A,lda, B,ldb, beta,C,ldc);

        fflas_delete(A);
        fflas_delete(B);

        if (!ok)
            break;
    }
    fflas_delete (C);
    fflas_delete (D);

    return ok ;
}


template<class Field, class RandIter>
bool launch_MM_dispatch(const Field &F,
                        const int mm,
                        const int nn,
                        const int kk,
                        const typename Field::Element alpha,
                        const typename Field::Element beta,
                        const size_t iters,
                        const int nbw,
                        const bool par,
                        RandIter& G)
{
    bool ok = true;
    size_t m,n,k;
    size_t lda,ldb,ldc;
    //!@bug test for ldX equal
    //!@bug test for transpo
    //!@todo does nbw actually do nbw recursive calls and then call blas (check ?) ?
    size_t ld = 13 ;
    {
        FFLAS_TRANSPOSE ta = FflasNoTrans ;
        FFLAS_TRANSPOSE tb = FflasNoTrans ;
        if (! par) {
            if (random()%2) ta = FflasTrans ;
            if (random()%2) tb = FflasTrans ;
        }

        if (mm<0)
            m = 1+(size_t)random() % -mm;
        else m = mm;
        if (nn<0)
            n = 1+(size_t)random() % -nn;
        else n = nn;
        if (kk<0)
            k = 1+(size_t)random() % -kk;
        else k = kk;

        int logdim = (int)floor(log(std::min(std::min(m,k),n))/log(2.));
        int nw = std::min (logdim,nbw);

        lda = std::max(k,m)+(size_t)random()%ld;
        ldb = std::max(n,k)+(size_t)random()%ld;
        ldc = n+(size_t)random()%ld;
#ifdef __FFLASFFPACK_DEBUG
        std::cerr <<"q = "<<F.characteristic()<<" nw = "<<nw<<" m,k,n = "<<m<<", "<<k<<", "<<n<<" C := "
        <<alpha<<".A"<<((ta==FflasTrans)?"^T":"")
        <<" * B"<<((tb==FflasTrans)?"^T":"");
        if (!F.isZero(beta))
            cerr<<" + "<<beta<<" C";
#endif

        ok = ok && launch_MM (F, m, n, k, alpha,beta, ldc, lda, ta,ldb, tb, iters,nw, par, G);

#ifdef __FFLASFFPACK_DEBUG
        std::cerr<<(ok?" -> ok ":" -> KO")<<std::endl;
#endif
    }
    return ok ;
}

template <class Field>
bool run_with_field (Givaro::Integer q, uint64_t b, int m, int n, int k, int nbw, size_t iters, bool par, size_t seed){
    bool ok = true ;

    int nbit=(int)iters;

    while (ok &&  nbit){
        typedef typename Field::Element Element ;
        // choose Field
        Field* F= chooseField<Field>(q,b,seed);
        if (F==nullptr)
            return true;

        std::ostringstream oss;
        F->write(oss);
        std::cout.fill('.');
        std::cout<<"Checking ";
        std::cout.width(50);
        std::cout<<oss.str();
        std::cout<<" ... ";

        if (nbw<0)
            nbw = (int) random() % 7;
#ifdef __FFLASFFPACK_DEBUG
        F->write(std::cerr) << std::endl;
#endif
        typedef typename Field::Element  Element ;
        typename Field::RandIter R(*F,b,seed++);
        typename Field::NonZeroRandIter NZR(R);

        //size_t k = 0 ;
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,F->one,F->zero,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,F->zero,F->zero,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,F->mOne,F->zero,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,F->one ,F->one,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,F->zero,F->one,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,F->mOne,F->one,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,F->one ,F->mOne,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,F->zero,F->mOne,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,F->mOne,F->mOne,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;

        Element alpha,beta ;
        NZR.random(alpha);
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,F->one ,alpha,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,F->zero,alpha,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,F->mOne,alpha,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,alpha,F->one ,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,alpha,F->zero,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;
        ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,alpha,F->mOne,iters,nbw, par, R);
        //std::cout << k << "/24" << std::endl; ++k;

        for (size_t j = 0 ; j < 3 ; ++j) {
            R.random(alpha);
            R.random(beta);
            ok = ok && launch_MM_dispatch<Field>(*F,m,n,k,alpha,beta,iters,nbw, par, R);
            //std::cout << k << "/24" << std::endl; ++k;
        }
        //std::cout<<std::endl;
        nbit--;
        if ( !ok )
            //std::cout << "\033[1;31mFAILED\033[0m "<<std::endl;
            std::cout << "FAILED "<<std::endl;
        else
            //std::cout << "\033[1;32mPASSED\033[0m "<<std::endl;
            std::cout << "PASSED "<<std::endl;
        delete F;
    }
    return ok;
}
int main(int argc, char** argv)
{
    std::cout<<setprecision(17);
    std::cerr<<setprecision(17);

    uint64_t seed = getSeed();
    size_t iters = 2 ;
    Givaro::Integer q = -1 ;
    uint64_t b = 0 ;
    int m = -50 ;
    int n = -50 ;
    int k = -50 ;
    int nbw = -1 ;
    bool loop = false;
    bool p = false;
    Argument as[] = {
        { 'q', "-q Q", "Set the field characteristic (-1 for random).",         TYPE_INTEGER , &q },
        { 'b', "-b B", "Set the bitsize of the random characteristic.",         TYPE_INT , &b },
        { 'm', "-m M", "Set the dimension of the matrix (negative values, mean, any random value between 0 and |n|).",      TYPE_INT , &m },
        { 'n', "-n N", "Set the dimension of the matrix (negative values, mean, any random value between 0 and |n|).",      TYPE_INT , &n },
        { 'k', "-k K", "Set the dimension of the matrix (negative values, mean, any random value between 0 and |k|).",      TYPE_INT , &k },
        { 'w', "-w N", "Set the number of winograd levels (-1 for random).",    TYPE_INT , &nbw },
        { 'i', "-i R", "Set number of repetitions.",            TYPE_INT , &iters },
        { 'l', "-l Y/N", "run the test in an infinte loop.", TYPE_BOOL , &loop },
        { 'p', "-p Y/N", "run the parallel fgemm.", TYPE_BOOL , &p },
        { 's', "-s seed", "Set seed for the random generator", TYPE_UINT64, &seed },
        END_OF_ARGUMENTS
    };

    parseArguments(argc,argv,as);

    bool ok = true;
    srand(seed);
    do{
        ok = ok && run_with_field<Modular<double> >(q,b,m,n,k,nbw,iters,p, seed);
        ok = ok && run_with_field<ModularBalanced<double> >(q,b,m,n,k,nbw,iters,p, seed);
        ok = ok && run_with_field<Modular<float> >(q,b,m,n,k,nbw,iters,p, seed);
        ok = ok && run_with_field<ModularBalanced<float> >(q,b,m,n,k,nbw,iters,p, seed);
#ifndef __FFLASFFPACK_HAVE_AVX512F_INSTRUCTIONS
        // int32_t simd not yet fully implemented over AVX512
        ok = ok && run_with_field<Modular<int32_t> >(q,b,m,n,k,nbw,iters,p, seed);
        ok = ok && run_with_field<ModularBalanced<int32_t> >(q,b,m,n,k,nbw,iters,p, seed);
#endif
        ok = ok && run_with_field<Modular<int64_t> >(q,b,m,n,k,nbw,iters, p, seed);
        ok = ok && run_with_field<Modular<int64_t> >(q,b?b:25,m,n,k,nbw,iters, p, seed);
        ok = ok && run_with_field<ModularBalanced<int64_t> >(q,b,m,n,k,nbw,iters, p, seed);
        ok = ok && run_with_field<ModularBalanced<int64_t> >(q,b?b:25,m,n,k,nbw,iters, p, seed);
        ok = ok && run_with_field<Modular<RecInt::rint<7> > >(q,b?b:63_ui64,m,n,k,nbw,iters, p, seed);
        ok = ok && run_with_field<Modular<RecInt::rint<8> > >(q,b?b:127_ui64,m,n,k,nbw,iters, p, seed);
        ok = ok && run_with_field<Modular<RecInt::ruint<7>,RecInt::ruint<8> > >(q,b?b:127_ui64,m,n,k,nbw,iters, p, seed);
        ok = ok && run_with_field<Modular<Givaro::Integer> >(q,(b?b:512_ui64),m,n,k,nbw,iters,p, seed);
        ok = ok && run_with_field<Givaro::ZRing<Givaro::Integer> >(0,(b?b:512_ui64),m,n,k,nbw,iters,p, seed);
        seed++;
    } while (loop && ok);




    return !ok ;
}
/* -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
// vim:sts=4:sw=4:ts=4:et:sr:cino=>s,f0,{0,g0,(0,\:0,t0,+0,=s