#include "RasterPlugin.h"
#include "LayerFactory.h"
#include "USGSDEMLayer.h"

// Name and Mask for Plugin Identification
static const char* g_strPluginName = "USGS DEM";
static const char* g_strMasks      = "*.dem;*.1;*.2";

// Layer list
LayerFactory g_layers;

// Instance handle
HANDLE g_hInstance = NULL;

// DLL Entry function
BOOL WINAPI DllMain( HINSTANCE hInstance, DWORD fdwReason, LPVOID fImpLoad )
{
    // Save the instance handle
    g_hInstance = hInstance;

    return TRUE;
}

// Plugin ID functions
const char* getName()
{
    return g_strPluginName;
}

const char* getMasks()
{
    return g_strMasks;
}

void destroyOverlay( int layerID )
{
    g_layers.removeLayer( layerID );
}

void getBoundingRect( int layerID, double* pLeft, double* pBottom,
                      double* pRight, double* pTop )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        pLayer->getBoundingRect( *pLeft, *pBottom, *pRight, *pTop );
    }
}

const char* getDescription( int layerID )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        return pLayer->getDescription();
    }

    return NULL;
}

long getImageHeight( int layerID )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        return pLayer->getImageHeight();
    }

    return 0;
}

long getImageWidth( int layerID )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        return pLayer->getImageWidth();
    }

    return 0;
}

void getProjection( int layerID, PROJSYS* pProjSys, DATUM* pDatum, UNIT* pUnit, 
                    int* pZone, double* pParams )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        pLayer->getProjection( *pProjSys, *pDatum, *pUnit, *pZone, pParams );
    }
}

bool getRowColColor( int layerID, long row, long col,
                     unsigned char* pR, unsigned char* pG, unsigned char* pB )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        return pLayer->getRowColColor( row, col, *pR, *pG, *pB );
    }

    return false;
}

bool loadOverlay( int layerID, const char* strFilename )
{
    // Create a new instance of the plugin layer type
    RasterPluginLayer* pLayer = new USGSDEMLayer( layerID, strFilename, (struct HINSTANCE__ *)g_hInstance );

    // Add the layer to the list
    g_layers.addLayer( pLayer );

    // Load the layer
    return pLayer->load();
}

bool getElevation( int layerID, long row, long col, float* pElev )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        return pLayer->getElevation( row, col, *pElev );
    }

    return false;
}

void getMinMaxSampleValue( int layerID, float* pMin, float* pMax )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        pLayer->getMinMaxSampleValue( *pMin, *pMax );
    }
}

float getVerticalPixelScale( int layerID )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        return pLayer->getVerticalPixelScale();
    }

    return 30;
}

UNIT getVerticalUnits( int layerID )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        return pLayer->getVerticalUnits();
    }

    return METERS;
}

bool isVertical( int layerID )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        return pLayer->isVertical();
    }

    return false;
}

bool showOptionsDialog( int layerID )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        return pLayer->showOptionsDialog();
    }

    return false;
}

void showPropertiesDialog( int layerID )
{
    RasterPluginLayer* pLayer = g_layers.getLayer( layerID );
    if ( NULL != pLayer )
    {
        pLayer->showPropertiesDialog();
    }
}