/*
  Copyright 2013 Statoil ASA.

  This file is part of the Open Porous Media project (OPM).

  OPM is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  OPM 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 OPM.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <config.h>

#if HAVE_DYNAMIC_BOOST_TEST
#define BOOST_TEST_DYN_LINK
#endif

#define NVERBOSE  // Suppress own messages when throw()ing

#define BOOST_TEST_MODULE WellsManagerTests
#include <boost/test/unit_test.hpp>

#include <opm/parser/eclipse/Parser/Parser.hpp>
#include <opm/parser/eclipse/EclipseState/Schedule/Schedule.hpp>

#include <opm/core/wells/WellsManager.hpp>
#include <opm/core/wells.h>
#include <opm/core/well_controls.h>

#include <opm/core/grid/GridManager.hpp>


void wells_static_check(const Wells* wells) {
    BOOST_CHECK_EQUAL(2 , wells->number_of_wells);
    BOOST_CHECK_EQUAL(3 , wells->number_of_phases);

    BOOST_CHECK_EQUAL("INJ1" , wells->name[0]);
    BOOST_CHECK_EQUAL("PROD1" , wells->name[1]);

    /* The mapping from well number into the wells->WI and wells->well_cells arrays. */
    BOOST_CHECK_EQUAL(0 , wells->well_connpos[0]);
    BOOST_CHECK_EQUAL(1 , wells->well_connpos[1]);
    BOOST_CHECK_EQUAL(2 , wells->well_connpos[2]);

    /* Connection factor */
    BOOST_CHECK_CLOSE(1.2279166666666664e-12 , wells->WI[0] , 0.001);
    BOOST_CHECK_CLOSE(1.2279166666666664e-12 , wells->WI[1] , 0.001);

    /* Completed cells */
    BOOST_CHECK_EQUAL(0 , wells->well_cells[0]);
    BOOST_CHECK_EQUAL(9 + 2*10 + 2*10*10 , wells->well_cells[1]);
}


/*
   The number of controls is determined by looking at which elements
   have been given explicit - non-default - values in the WCONxxxx
   keyword. Is that at all interesting?
*/


void check_controls_epoch0( struct WellControls ** ctrls) {
    // The injector
    {
        const struct WellControls * ctrls0 = ctrls[0];
        BOOST_CHECK_EQUAL( 3 , well_controls_get_num(ctrls0));   // The number of controls for the injector == 3??

        BOOST_CHECK_EQUAL( SURFACE_RATE   , well_controls_iget_type(ctrls0 , 0) );
        BOOST_CHECK_EQUAL( RESERVOIR_RATE , well_controls_iget_type(ctrls0 , 1) );
        BOOST_CHECK_EQUAL( BHP            , well_controls_iget_type(ctrls0 , 2) );

        // The different targets
        BOOST_CHECK_EQUAL( 100.0 / 86400 , well_controls_iget_target(ctrls0,0));
        BOOST_CHECK_EQUAL( 200.0 / 86400 , well_controls_iget_target(ctrls0,1));
        BOOST_CHECK_EQUAL( 400 * 100000  , well_controls_iget_target(ctrls0,2));

        // Which control is active
        BOOST_CHECK_EQUAL( 0 , well_controls_get_current(ctrls0) );

        // The phase distribution in the active target
        {
             const double * distr = well_controls_iget_distr( ctrls0 , 0 );
             BOOST_CHECK_EQUAL( 0 , distr[0] );  // Water
             BOOST_CHECK_EQUAL( 0 , distr[1] );  // Oil
             BOOST_CHECK_EQUAL( 1 , distr[2] );  // Gas
        }
    }

    // The producer
    {
        const struct WellControls * ctrls1 = ctrls[1];
        BOOST_CHECK_EQUAL( 2 , well_controls_get_num( ctrls1 ));   // The number of controls for the producer == 2??
        BOOST_CHECK_EQUAL( SURFACE_RATE   , well_controls_iget_type(ctrls1 , 0) );
        BOOST_CHECK_EQUAL( BHP            , well_controls_iget_type(ctrls1 , 1) );

        // The different targets
        BOOST_CHECK_EQUAL( -20000.0 / 86400 , well_controls_iget_target(ctrls1,0));
        BOOST_CHECK_EQUAL(  1000 * 100000   , well_controls_iget_target(ctrls1,1));

        // Which control is active
        BOOST_CHECK_EQUAL( 0 , well_controls_get_current(ctrls1));

        // The phase distribution in the active target
       {
            const double * distr = well_controls_iget_distr( ctrls1 , 0 );
            BOOST_CHECK_EQUAL( 0 , distr[0] );  // Water
            BOOST_CHECK_EQUAL( 1 , distr[1] );  // Oil
            BOOST_CHECK_EQUAL( 0 , distr[2] );  // Gas
        }
    }
}




void check_controls_epoch1( struct WellControls ** ctrls) {
    // The injector
    {
        const struct WellControls * ctrls0 = ctrls[0];
        BOOST_CHECK_EQUAL( 3 , well_controls_get_num(ctrls0));   // The number of controls for the injector == 3??

        BOOST_CHECK_EQUAL( SURFACE_RATE   , well_controls_iget_type(ctrls0 , 0 ));
        BOOST_CHECK_EQUAL( RESERVOIR_RATE , well_controls_iget_type(ctrls0 , 1 ));
        BOOST_CHECK_EQUAL( BHP            , well_controls_iget_type(ctrls0 , 2 ));

        // The different targets
        BOOST_CHECK_CLOSE( 10.0 / 86400 , well_controls_iget_target(ctrls0 , 0) , 0.001);
        BOOST_CHECK_CLOSE( 20.0 / 86400 , well_controls_iget_target(ctrls0 , 1) , 0.001);
        BOOST_CHECK_CLOSE( 40 * 100000  , well_controls_iget_target(ctrls0 , 2) , 0.001);

        // Which control is active
        BOOST_CHECK_EQUAL( 1 , well_controls_get_current(ctrls0));

        {
            const double * distr = well_controls_iget_distr( ctrls0 , 1 );
            BOOST_CHECK_EQUAL( 1 , distr[0] );  // Water
            BOOST_CHECK_EQUAL( 0 , distr[1] );  // Oil
            BOOST_CHECK_EQUAL( 0 , distr[2] );  // Gas
        }
    }

    // The producer
    {
        const struct WellControls * ctrls1 = ctrls[1];
        BOOST_CHECK_EQUAL( 3 , well_controls_get_num(ctrls1));   // The number of controls for the producer - now 3.
        BOOST_CHECK_EQUAL( SURFACE_RATE   , well_controls_iget_type(ctrls1 , 0) );
        BOOST_CHECK_EQUAL( RESERVOIR_RATE , well_controls_iget_type(ctrls1 , 1) );
        BOOST_CHECK_EQUAL( BHP            , well_controls_iget_type(ctrls1 , 2) );

        // The different targets
        BOOST_CHECK_CLOSE( -999.0 / 86400 , well_controls_iget_target(ctrls1 , 0), 0.001);
        BOOST_CHECK_CLOSE( -123.0 / 86400 , well_controls_iget_target(ctrls1 , 1), 0.001);
        BOOST_CHECK_CLOSE(  100 * 100000  , well_controls_iget_target(ctrls1 , 2), 0.001);

        // Which control is active
        BOOST_CHECK_EQUAL( 1 , well_controls_get_current(ctrls1) );

        {
            const double * distr = well_controls_iget_distr( ctrls1 , 1 );
            BOOST_CHECK_EQUAL( 1 , distr[0] );  // Water
            BOOST_CHECK_EQUAL( 1 , distr[1] );  // Oil
            BOOST_CHECK_EQUAL( 1 , distr[2] );  // Gas
        }
    }
}


void check_controls_epoch3( struct WellControls ** ctrls) {
    // The new producer
    const struct WellControls * ctrls1 = ctrls[1];
    // Note: controls include default (1 atm) BHP control.
    BOOST_CHECK_EQUAL( 6 , well_controls_get_num(ctrls1));
}




BOOST_AUTO_TEST_CASE(New_Constructor_Works) {

    const std::string filename = "wells_manager_data.data";
    Opm::ParserPtr parser(new Opm::Parser());
    Opm::DeckConstPtr deck(parser->parseFile(filename));

    Opm::EclipseStateConstPtr eclipseState(new Opm::EclipseState(deck));
    Opm::GridManager gridManager(deck);

    {
        Opm::WellsManager wellsManager(eclipseState, 0, *gridManager.c_grid(), NULL);
        wells_static_check( wellsManager.c_wells() );
        check_controls_epoch0( wellsManager.c_wells()->ctrls );
    }

    {
        Opm::WellsManager wellsManager(eclipseState, 1, *gridManager.c_grid(), NULL);
        wells_static_check( wellsManager.c_wells() );
        check_controls_epoch1( wellsManager.c_wells()->ctrls );
    }


    {
        Opm::WellsManager wellsManager(eclipseState, 3, *gridManager.c_grid(), NULL);
        const Wells* wells = wellsManager.c_wells();

        // There is 3 wells in total in the deck at the 3rd schedule step.
        // PROD1 is shut and should therefore not be counted.
        // The new well is therefore the secound well.
        BOOST_CHECK_EQUAL(2 , wells->number_of_wells);
        BOOST_CHECK_EQUAL( wells->name[0] , "INJ1");
        BOOST_CHECK_EQUAL( wells->name[1] , "NEW");

        check_controls_epoch3( wellsManager.c_wells()->ctrls );
    }

}



BOOST_AUTO_TEST_CASE(WellsEqual) {
    const std::string filename = "wells_manager_data.data";
    Opm::ParserPtr parser(new Opm::Parser());
    Opm::DeckConstPtr deck(parser->parseFile(filename));

    Opm::EclipseStateConstPtr eclipseState(new Opm::EclipseState(deck));
    Opm::GridManager gridManager(deck);

    Opm::WellsManager wellsManager0(eclipseState , 0 , *gridManager.c_grid(), NULL);
    Opm::WellsManager wellsManager1(eclipseState , 1 , *gridManager.c_grid(), NULL);

    BOOST_CHECK(  wells_equal( wellsManager0.c_wells() , wellsManager0.c_wells(),false) );
    BOOST_CHECK( !wells_equal( wellsManager0.c_wells() , wellsManager1.c_wells(),false) );
}


BOOST_AUTO_TEST_CASE(ControlsEqual) {
    const std::string filename = "wells_manager_data.data";
    Opm::ParserPtr parser(new Opm::Parser());
    Opm::DeckConstPtr deck(parser->parseFile(filename));

    Opm::EclipseStateConstPtr eclipseState(new Opm::EclipseState(deck));
    Opm::GridManager gridManager(deck);

    Opm::WellsManager wellsManager0(eclipseState , 0 , *gridManager.c_grid(), NULL);
    Opm::WellsManager wellsManager1(eclipseState , 1 , *gridManager.c_grid(), NULL);

    BOOST_CHECK(  well_controls_equal( wellsManager0.c_wells()->ctrls[0] , wellsManager0.c_wells()->ctrls[0] , false));
    BOOST_CHECK(  well_controls_equal( wellsManager0.c_wells()->ctrls[1] , wellsManager0.c_wells()->ctrls[1] , false));
    BOOST_CHECK(  well_controls_equal( wellsManager1.c_wells()->ctrls[0] , wellsManager1.c_wells()->ctrls[0] , false));
    BOOST_CHECK(  well_controls_equal( wellsManager1.c_wells()->ctrls[1] , wellsManager1.c_wells()->ctrls[1] , false));

    BOOST_CHECK(  !well_controls_equal( wellsManager0.c_wells()->ctrls[0] , wellsManager0.c_wells()->ctrls[1] , false));
    BOOST_CHECK(  !well_controls_equal( wellsManager0.c_wells()->ctrls[1] , wellsManager0.c_wells()->ctrls[0] , false));
    BOOST_CHECK(  !well_controls_equal( wellsManager1.c_wells()->ctrls[0] , wellsManager0.c_wells()->ctrls[0] , false));
    BOOST_CHECK(  !well_controls_equal( wellsManager1.c_wells()->ctrls[1] , wellsManager0.c_wells()->ctrls[1] , false));
}



BOOST_AUTO_TEST_CASE(WellShutOK) {
    const std::string filename = "wells_manager_data.data";
    Opm::ParserPtr parser(new Opm::Parser());
    Opm::DeckConstPtr deck(parser->parseFile(filename));

    Opm::EclipseStateConstPtr eclipseState(new Opm::EclipseState(deck));
    Opm::GridManager gridManager(deck);

    Opm::WellsManager wellsManager2(eclipseState , 2 , *gridManager.c_grid(), NULL);

    // Shut wells are not added to the deck. i.e number of wells should be 2-1
    BOOST_CHECK( wellsManager2.c_wells()->number_of_wells == 1);

    //BOOST_CHECK_NO_THROW( Opm::WellsManager wellsManager2(eclipseState , 2 , *gridManager.c_grid(), NULL));
}



BOOST_AUTO_TEST_CASE(WellSTOPOK) {
    const std::string filename = "wells_manager_data_wellSTOP.data";
    Opm::ParserPtr parser(new Opm::Parser());
    Opm::DeckConstPtr deck(parser->parseFile(filename));

    Opm::EclipseStateConstPtr eclipseState(new Opm::EclipseState(deck));
    Opm::GridManager gridManager(deck);

    Opm::WellsManager wellsManager(eclipseState , 0 , *gridManager.c_grid(), NULL);

    const Wells* wells = wellsManager.c_wells();
    const struct WellControls* ctrls0 = wells->ctrls[0];
    const struct WellControls* ctrls1 = wells->ctrls[1];

    BOOST_CHECK(well_controls_well_is_stopped(ctrls0)); // The first well is closed
    BOOST_CHECK(well_controls_well_is_open(ctrls1));  // The second well is open
}