/*
    Copyright 2005-2015 Intel Corporation.  All Rights Reserved.

    This file is part of Threading Building Blocks. Threading Building Blocks is free software;
    you can redistribute it and/or modify it under the terms of the GNU General Public License
    version 2  as  published  by  the  Free Software Foundation.  Threading Building Blocks 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 General Public License for more details.   You should have received a copy of
    the  GNU General Public License along with Threading Building Blocks; if not, write to the
    Free Software Foundation, Inc.,  51 Franklin St,  Fifth Floor,  Boston,  MA 02110-1301 USA

    As a special exception,  you may use this file  as part of a free software library without
    restriction.  Specifically,  if other files instantiate templates  or use macros or inline
    functions from this file, or you compile this file and link it with other files to produce
    an executable,  this file does not by itself cause the resulting executable to be covered
    by the GNU General Public License. This exception does not however invalidate any other
    reasons why the executable file might be covered by the GNU General Public License.
*/

// Workaround for ICC 11.0 not finding __sync_fetch_and_add_4 on some of the Linux platforms.
#if __linux__ && defined(__INTEL_COMPILER)
#define __sync_fetch_and_add(ptr,addend) _InterlockedExchangeAdd(const_cast<void*>(reinterpret_cast<volatile void*>(ptr)), addend)
#endif
#include <string>
#include <cstring>
#include <cctype>
#include <cstdlib>
#include <cstdio>
#include "tbb/concurrent_hash_map.h"
#include "tbb/blocked_range.h"
#include "tbb/parallel_for.h"
#include "tbb/tick_count.h"
#include "tbb/task_scheduler_init.h"
#include "tbb/tbb_allocator.h"
#include "../../common/utility/utility.h"


//! String type with scalable allocator.
/** On platforms with non-scalable default memory allocators, the example scales 
    better if the string allocator is changed to tbb::tbb_allocator<char>. */
typedef std::basic_string<char,std::char_traits<char>,tbb::tbb_allocator<char> > MyString;

using namespace tbb;
using namespace std;

//! Set to true to counts.
static bool verbose = false;
static bool silent = false;
//! Problem size
long N = 1000000;
const int size_factor = 2;

//! A concurrent hash table that maps strings to ints.
typedef concurrent_hash_map<MyString,int> StringTable;

//! Function object for counting occurrences of strings.
struct Tally {
    StringTable& table;
    Tally( StringTable& table_ ) : table(table_) {}
    void operator()( const blocked_range<MyString*> range ) const {
        for( MyString* p=range.begin(); p!=range.end(); ++p ) {
            StringTable::accessor a;
            table.insert( a, *p );
            a->second += 1;
        }
    }
};

static MyString* Data;

static void CountOccurrences(int nthreads) {
    StringTable table;

    tick_count t0 = tick_count::now();
    parallel_for( blocked_range<MyString*>( Data, Data+N, 1000 ), Tally(table) );
    tick_count t1 = tick_count::now();

    int n = 0;
    for( StringTable::iterator i=table.begin(); i!=table.end(); ++i ) {
        if( verbose && nthreads )
            printf("%s %d\n",i->first.c_str(),i->second);
        n += i->second;
    }

    if ( !silent ) printf("total = %d  unique = %u  time = %g\n", n, unsigned(table.size()), (t1-t0).seconds());
}

/// Generator of random words

struct Sound {
    const char *chars;
    int rates[3];// beginning, middle, ending
};
Sound Vowels[] = {
    {"e", {445,6220,1762}}, {"a", {704,5262,514}}, {"i", {402,5224,162}}, {"o", {248,3726,191}},
    {"u", {155,1669,23}}, {"y", {4,400,989}}, {"io", {5,512,18}}, {"ia", {1,329,111}},
    {"ea", {21,370,16}}, {"ou", {32,298,4}}, {"ie", {0,177,140}}, {"ee", {2,183,57}},
    {"ai", {17,206,7}}, {"oo", {1,215,7}}, {"au", {40,111,2}}, {"ua", {0,102,4}},
    {"ui", {0,104,1}}, {"ei", {6,94,3}}, {"ue", {0,67,28}}, {"ay", {1,42,52}},
    {"ey", {1,14,80}}, {"oa", {5,84,3}}, {"oi", {2,81,1}}, {"eo", {1,71,5}},
    {"iou", {0,61,0}}, {"oe", {2,46,9}}, {"eu", {12,43,0}}, {"iu", {0,45,0}},
    {"ya", {12,19,5}}, {"ae", {7,18,10}}, {"oy", {0,10,13}}, {"ye", {8,7,7}},
    {"ion", {0,0,20}}, {"ing", {0,0,20}}, {"ium", {0,0,10}}, {"er", {0,0,20}}
};
Sound Consonants[] = {
    {"r", {483,1414,1110}}, {"n", {312,1548,1114}}, {"t", {363,1653,251}}, {"l", {424,1341,489}},
    {"c", {734,735,260}}, {"m", {732,785,161}}, {"d", {558,612,389}}, {"s", {574,570,405}},
    {"p", {519,361,98}}, {"b", {528,356,30}}, {"v", {197,598,16}}, {"ss", {3,191,567}},
    {"g", {285,430,42}}, {"st", {142,323,180}}, {"h", {470,89,30}}, {"nt", {0,350,231}},
    {"ng", {0,117,442}}, {"f", {319,194,19}}, {"ll", {1,414,83}}, {"w", {249,131,64}},
    {"k", {154,179,47}}, {"nd", {0,279,92}}, {"bl", {62,235,0}}, {"z", {35,223,16}},
    {"sh", {112,69,79}}, {"ch", {139,95,25}}, {"th", {70,143,39}}, {"tt", {0,219,19}},
    {"tr", {131,104,0}}, {"pr", {186,41,0}}, {"nc", {0,223,2}}, {"j", {184,32,1}},
    {"nn", {0,188,20}}, {"rt", {0,148,51}}, {"ct", {0,160,29}}, {"rr", {0,182,3}},
    {"gr", {98,87,0}}, {"ck", {0,92,86}}, {"rd", {0,81,88}}, {"x", {8,102,48}},
    {"ph", {47,101,10}}, {"br", {115,43,0}}, {"cr", {92,60,0}}, {"rm", {0,131,18}},
    {"ns", {0,124,18}}, {"sp", {81,55,4}}, {"sm", {25,29,85}}, {"sc", {53,83,1}},
    {"rn", {0,100,30}}, {"cl", {78,42,0}}, {"mm", {0,116,0}}, {"pp", {0,114,2}},
    {"mp", {0,99,14}}, {"rs", {0,96,16}}, /*{"q", {52,57,1}},*/ {"rl", {0,97,7}},
    {"rg", {0,81,15}}, {"pl", {56,39,0}}, {"sn", {32,62,1}}, {"str", {38,56,0}},
    {"dr", {47,44,0}}, {"fl", {77,13,1}}, {"fr", {77,11,0}}, {"ld", {0,47,38}},
    {"ff", {0,62,20}}, {"lt", {0,61,19}}, {"rb", {0,75,4}}, {"mb", {0,72,7}},
    {"rc", {0,76,1}}, {"gg", {0,74,1}}, {"pt", {1,56,10}}, {"bb", {0,64,1}},
    {"sl", {48,17,0}}, {"dd", {0,59,2}}, {"gn", {3,50,4}}, {"rk", {0,30,28}},
    {"nk", {0,35,20}}, {"gl", {40,14,0}}, {"wh", {45,6,0}}, {"ntr", {0,50,0}},
    {"rv", {0,47,1}}, {"ght", {0,19,29}}, {"sk", {23,17,5}}, {"nf", {0,46,0}},
    {"cc", {0,45,0}}, {"ln", {0,41,0}}, {"sw", {36,4,0}}, {"rp", {0,36,4}},
    {"dn", {0,38,0}}, {"ps", {14,19,5}}, {"nv", {0,38,0}}, {"tch", {0,21,16}},
    {"nch", {0,26,11}}, {"lv", {0,35,0}}, {"wn", {0,14,21}}, {"rf", {0,32,3}},
    {"lm", {0,30,5}}, {"dg", {0,34,0}}, {"ft", {0,18,15}}, {"scr", {23,10,0}},
    {"rch", {0,24,6}}, {"rth", {0,23,7}}, {"rh", {13,15,0}}, {"mpl", {0,29,0}},
    {"cs", {0,1,27}}, {"gh", {4,10,13}}, {"ls", {0,23,3}}, {"ndr", {0,25,0}},
    {"tl", {0,23,1}}, {"ngl", {0,25,0}}, {"lk", {0,15,9}}, {"rw", {0,23,0}},
    {"lb", {0,23,1}}, {"tw", {15,8,0}}, /*{"sq", {15,8,0}},*/ {"chr", {18,4,0}},
    {"dl", {0,23,0}}, {"ctr", {0,22,0}}, {"nst", {0,21,0}}, {"lc", {0,22,0}},
    {"sch", {16,4,0}}, {"ths", {0,1,20}}, {"nl", {0,21,0}}, {"lf", {0,15,6}},
    {"ssn", {0,20,0}}, {"xt", {0,18,1}}, {"xp", {0,20,0}}, {"rst", {0,15,5}},
    {"nh", {0,19,0}}, {"wr", {14,5,0}}
};
const int VowelsNumber = sizeof(Vowels)/sizeof(Sound);
const int ConsonantsNumber = sizeof(Consonants)/sizeof(Sound);
int VowelsRatesSum[3] = {0,0,0}, ConsonantsRatesSum[3] = {0,0,0};

int CountRateSum(Sound sounds[], const int num, const int part)
{
    int sum = 0;
    for(int i = 0; i < num; i++)
        sum += sounds[i].rates[part];
    return sum;
}

const char *GetLetters(int type, const int part)
{
    Sound *sounds; int rate, i = 0;
    if(type & 1)
        sounds = Vowels, rate = rand() % VowelsRatesSum[part];
    else
        sounds = Consonants, rate = rand() % ConsonantsRatesSum[part];
    do {
        rate -= sounds[i++].rates[part];
    } while(rate > 0);
    return sounds[--i].chars;
}

static void CreateData() {
    for(int i = 0; i < 3; i++) {
        ConsonantsRatesSum[i] = CountRateSum(Consonants, ConsonantsNumber, i);
        VowelsRatesSum[i] = CountRateSum(Vowels, VowelsNumber, i);
    }
    for( int i=0; i<N; ++i ) {
        int type = rand();
        Data[i] = GetLetters(type++, 0);
        for( int j = 0; j < type%size_factor; ++j )
            Data[i] += GetLetters(type++, 1);
        Data[i] += GetLetters(type, 2);
    }
    MyString planet = Data[12]; planet[0] = toupper(planet[0]);
    MyString helloworld = Data[0]; helloworld[0] = toupper(helloworld[0]);
    helloworld += ", "+Data[1]+" "+Data[2]+" "+Data[3]+" "+Data[4]+" "+Data[5];
    if ( !silent ) printf("Message from planet '%s': %s!\nAnalyzing whole text...\n", planet.c_str(), helloworld.c_str());
}

int main( int argc, char* argv[] ) {
    try {
        tbb::tick_count mainStartTime = tbb::tick_count::now();
        srand(2);

        //! Working threads count
        // The 1st argument is the function to obtain 'auto' value; the 2nd is the default value
        // The example interprets 0 threads as "run serially, then fully subscribed"
        utility::thread_number_range threads(tbb::task_scheduler_init::default_num_threads,0);

        utility::parse_cli_arguments(argc,argv,
            utility::cli_argument_pack()
            //"-h" option for displaying help is present implicitly
            .positional_arg(threads,"n-of-threads",utility::thread_number_range_desc)
            .positional_arg(N,"n-of-strings","number of strings")
            .arg(verbose,"verbose","verbose mode")
            .arg(silent,"silent","no output except elapsed time")
            );

        if ( silent ) verbose = false;

        Data = new MyString[N];
        CreateData();

        if ( threads.first ) {
            for(int p = threads.first;  p <= threads.last; p = threads.step(p)) {
                if ( !silent ) printf("threads = %d  ", p );
                task_scheduler_init init( p );
                CountOccurrences( p );
            }
        } else { // Number of threads wasn't set explicitly. Run serial and parallel version
            { // serial run
                if ( !silent ) printf("serial run   ");
                task_scheduler_init init_serial(1);
                CountOccurrences(1);
            }
            { // parallel run (number of threads is selected automatically)
                if ( !silent ) printf("parallel run ");
                task_scheduler_init init_parallel;
                CountOccurrences(0);
            }
        }

        delete[] Data;

        utility::report_elapsed_time((tbb::tick_count::now() - mainStartTime).seconds());

        return 0;
    } catch(std::exception& e) {
        std::cerr<<"error occurred. error text is :\"" <<e.what()<<"\"\n";
    }
}
