#include "PluginManager.h"
#include "StockpileUtils.h"
#include "StockpileSerializer.h"

#include "modules/Filesystem.h"
#include "modules/Gui.h"

using std::vector;
using std::string;

using namespace DFHack;

DFHACK_PLUGIN("stockpiles");

static command_result savestock ( color_ostream &out, vector <string> & parameters );
static command_result loadstock ( color_ostream &out, vector <string> & parameters );

DFhackCExport command_result plugin_init ( color_ostream &out, std::vector <PluginCommand> &commands )
{
    commands.push_back(PluginCommand(
        "savestock",
        "Save the active stockpile's settings to a file.",
        savestock,
        Gui::any_stockpile_hotkey));
    commands.push_back(PluginCommand(
        "loadstock",
        "Load and apply stockpile settings from a file.",
        loadstock,
        Gui::any_stockpile_hotkey));

    return CR_OK;
}

DFhackCExport command_result plugin_shutdown ( color_ostream &out )
{
    return CR_OK;
}

//  exporting
static command_result savestock ( color_ostream &out, vector <string> & parameters )
{
    df::building_stockpilest *sp = Gui::getSelectedStockpile(out, true);
    if ( !sp )
    {
        out.printerr ( "Selected building isn't a stockpile.\n" );
        return CR_WRONG_USAGE;
    }

    if ( parameters.size() > 2 )
    {
        out.printerr ( "Invalid parameters\n" );
        return CR_WRONG_USAGE;
    }

    bool debug = false;
    std::string file;
    for ( size_t i = 0; i < parameters.size(); ++i )
    {
        const std::string o = parameters.at ( i );
        if ( o == "--debug"  ||  o ==  "-d" )
            debug =  true;
        else  if ( !o.empty() && o[0] !=  '-' )
        {
            file = o;
        }
    }
    if ( file.empty() )
    {
        out.printerr ( "You must supply a valid filename.\n" );
        return CR_WRONG_USAGE;
    }

    StockpileSerializer cereal ( sp );
    if ( debug )
        cereal.enable_debug ( out );

    if ( !is_dfstockfile ( file ) ) file += ".dfstock";
    try
    {
        if ( !cereal.serialize_to_file ( file ) )
        {
            out.printerr ( "could not save to %s\n", file.c_str() );
            return CR_FAILURE;
        }
    }
    catch ( std::exception &e )
    {
        out.printerr ( "serialization failed: protobuf exception: %s\n", e.what() );
        return CR_FAILURE;
    }

    return CR_OK;
}


// importing
static command_result loadstock ( color_ostream &out, vector <string> & parameters )
{
    df::building_stockpilest *sp = Gui::getSelectedStockpile(out, true);
    if ( !sp )
    {
        out.printerr ( "Selected building isn't a stockpile.\n" );
        return CR_WRONG_USAGE;
    }

    if ( parameters.size() < 1 ||  parameters.size() > 2 )
    {
        out.printerr ( "Invalid parameters\n" );
        return CR_WRONG_USAGE;
    }

    bool debug = false;
    std::string file;
    for ( size_t i = 0; i < parameters.size(); ++i )
    {
        const std::string o = parameters.at ( i );
        if ( o == "--debug"  ||  o ==  "-d" )
            debug =  true;
        else  if ( !o.empty() && o[0] !=  '-' )
        {
            file = o;
        }
    }
    if ( file.empty() ) {
        out.printerr ( "ERROR: missing .dfstock file parameter\n");
        return DFHack::CR_WRONG_USAGE;
    }
    if ( !is_dfstockfile ( file ) )
        file += ".dfstock";
    if ( !Filesystem::exists ( file ) )
    {
        out.printerr ( "ERROR: the .dfstock file doesn't exist: %s\n",  file.c_str());
        return CR_WRONG_USAGE;
    }

    StockpileSerializer cereal ( sp );
    if ( debug )
        cereal.enable_debug ( out );
    try
    {
        if ( !cereal.unserialize_from_file ( file ) )
        {
            out.printerr ( "unserialization failed: %s\n", file.c_str() );
            return CR_FAILURE;
        }
    }
    catch ( std::exception &e )
    {
        out.printerr ( "unserialization failed: protobuf exception: %s\n", e.what() );
        return CR_FAILURE;
    }
    return CR_OK;
}