/*
Copyright (c) 2003-2012 Sony Pictures Imageworks Inc., et al.
All Rights Reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution.
* Neither the name of Sony Pictures Imageworks nor the names of its
  contributors may be used to endorse or promote products derived from
  this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/


#include "OpenColorIO_AE.h"

#include "OpenColorIO_AE_Context.h"

#include <assert.h>


PF_Err ArbNewDefault(PF_InData *in_data, PF_OutData *out_data,
    void                *refconPV,
    PF_ArbitraryH       *arbPH)
{
    PF_Err err = PF_Err_NONE;
    
    if(arbPH)
    {
        *arbPH = PF_NEW_HANDLE( sizeof(ArbitraryData) );
        
        if(*arbPH)
        {
            ArbitraryData *arb_data = (ArbitraryData *)PF_LOCK_HANDLE(*arbPH);
            
            // set up defaults
            arb_data->version           = CURRENT_ARB_VERSION;
            
            arb_data->action            = OCIO_ACTION_NONE;
            arb_data->invert            = FALSE;
            
            arb_data->storage           = OCIO_STORAGE_NONE;
            arb_data->storage_size      = 0;
            arb_data->source            = OCIO_SOURCE_NONE;
            arb_data->interpolation     = OCIO_INTERP_LINEAR;
            
            arb_data->path[0]           = '\0';
            arb_data->relative_path[0]  = '\0';
            
            arb_data->input[0]          = '\0';
            arb_data->output[0]         = '\0';
            arb_data->transform[0]      = '\0';
            arb_data->device[0]         = '\0';
            arb_data->look[0]           = '\0';
            
            
            // set default with environment variable if it's set
            char *file = std::getenv("OCIO");
            
            if(file)
            {
                try
                {
                    OpenColorIO_AE_Context context(file, OCIO_SOURCE_ENVIRONMENT);
                    
                    strncpy(arb_data->path, file, ARB_PATH_LEN);
                    
                    arb_data->action = context.getAction();
                    arb_data->source = OCIO_SOURCE_ENVIRONMENT;
                    
                    if(arb_data->action != OCIO_ACTION_LUT)
                    {
                        strncpy(arb_data->input, context.getInput().c_str(), ARB_SPACE_LEN);
                        strncpy(arb_data->output, context.getOutput().c_str(), ARB_SPACE_LEN);
                        strncpy(arb_data->transform, context.getTransform().c_str(), ARB_SPACE_LEN);
                        strncpy(arb_data->device, context.getDevice().c_str(), ARB_SPACE_LEN);
                    }
                }
                catch(...) {}
            }
            
            
            PF_UNLOCK_HANDLE(*arbPH);
        }
    }
    
    return err;
}


static PF_Err ArbDispose(PF_InData *in_data, PF_OutData *out_data,
    void                *refconPV,
    PF_ArbitraryH       arbH)
{
    if(arbH)
        PF_DISPOSE_HANDLE(arbH);
    
    return PF_Err_NONE;
}


static void CopyArbData(ArbitraryData *out_arb_data, ArbitraryData *in_arb_data)
{
    // copy contents
    out_arb_data->version = in_arb_data->version;
    
    out_arb_data->action = in_arb_data->action;
    
    out_arb_data->invert = in_arb_data->invert;
    
    out_arb_data->storage = in_arb_data->storage;
    out_arb_data->storage_size = in_arb_data->storage_size;
    
    out_arb_data->source = in_arb_data->source;
    
    out_arb_data->interpolation = in_arb_data->interpolation;
    
    strcpy(out_arb_data->path, in_arb_data->path);
    strcpy(out_arb_data->relative_path, in_arb_data->relative_path);
    
    strcpy(out_arb_data->input, in_arb_data->input);
    strcpy(out_arb_data->output, in_arb_data->output);
    strcpy(out_arb_data->transform, in_arb_data->transform);
    strcpy(out_arb_data->device, in_arb_data->device);
    strcpy(out_arb_data->look, in_arb_data->look);
}


static PF_Err ArbCopy(PF_InData *in_data, PF_OutData *out_data,
    void                *refconPV,
    PF_ArbitraryH       src_arbH,
    PF_ArbitraryH       *dst_arbPH)
{
    PF_Err  err     = PF_Err_NONE;
    
    if(src_arbH && dst_arbPH)
    {
        // allocate using the creation function
        err = ArbNewDefault(in_data, out_data, refconPV, dst_arbPH);
        
        if(!err)
        {
            ArbitraryData *in_arb_data = (ArbitraryData *)PF_LOCK_HANDLE(src_arbH),
                            *out_arb_data = (ArbitraryData *)PF_LOCK_HANDLE(*dst_arbPH);
            
            CopyArbData(out_arb_data, in_arb_data);
            
            PF_UNLOCK_HANDLE(src_arbH);
            PF_UNLOCK_HANDLE(*dst_arbPH);
        }
    }
    
    return err;
}


static PF_Err ArbFlatSize(PF_InData *in_data, PF_OutData *out_data,
    void                *refconPV,
    PF_ArbitraryH       arbH,
    A_u_long            *flat_data_sizePLu)
{
    // flat is the same size as inflated
    if(arbH)
        *flat_data_sizePLu = PF_GET_HANDLE_SIZE(arbH);
    
    return PF_Err_NONE;
}


static void SwapArbData(ArbitraryData *arb_data)
{

}


static PF_Err ArbFlatten(PF_InData *in_data, PF_OutData *out_data,
    void                *refconPV,
    PF_ArbitraryH       arbH,
    A_u_long            buf_sizeLu,
    void                *flat_dataPV)
{
    PF_Err  err     = PF_Err_NONE;
    
    if(arbH && flat_dataPV)
    {
        // they provide the buffer, we just move data
        ArbitraryData *in_arb_data = (ArbitraryData *)PF_LOCK_HANDLE(arbH),
                        *out_arb_data = (ArbitraryData *)flat_dataPV;

        assert(buf_sizeLu >= PF_GET_HANDLE_SIZE(arbH));
    
        CopyArbData(out_arb_data, in_arb_data);
        
    #ifdef AE_BIG_ENDIAN
        // not that we're doing a PPC version of this...
        SwapArbData(out_arb_data);
    #endif
    
        PF_UNLOCK_HANDLE(arbH);
    }
    
    return err;
}


static PF_Err ArbUnFlatten(PF_InData *in_data, PF_OutData *out_data,
    void                *refconPV,
    A_u_long            buf_sizeLu,
    const void          *flat_dataPV,
    PF_ArbitraryH       *arbPH)
{
    PF_Err  err     = PF_Err_NONE;
    
    if(arbPH && flat_dataPV)
    {
        // they provide a flat buffer, we have to make the handle
        err = ArbNewDefault(in_data, out_data, refconPV, arbPH);
        
        if(!err && *arbPH)
        {
            ArbitraryData *in_arb_data = (ArbitraryData *)flat_dataPV,
                            *out_arb_data = (ArbitraryData *)PF_LOCK_HANDLE(*arbPH);

            assert(buf_sizeLu <= PF_GET_HANDLE_SIZE(*arbPH));
        
            CopyArbData(out_arb_data, in_arb_data);
            
        #ifdef AE_BIG_ENDIAN
            SwapArbData(out_arb_data);
        #endif
        
            PF_UNLOCK_HANDLE(*arbPH);
        }
    }
    
    return err;
}

static PF_Err ArbInterpolate(PF_InData *in_data, PF_OutData *out_data,
    void                *refconPV,
    PF_ArbitraryH       left_arbH,
    PF_ArbitraryH       right_arbH,
    PF_FpLong           tF,
    PF_ArbitraryH       *interpPH)
{
    PF_Err  err     = PF_Err_NONE;
    
    assert(FALSE); // we shouldn't be doing this
    
    if(left_arbH && right_arbH && interpPH)
    {
        // allocate using our own func
        err = ArbNewDefault(in_data, out_data, refconPV, interpPH);
        
        if(!err && *interpPH)
        {
            // we're just going to copy the left_data
            ArbitraryData *in_arb_data = (ArbitraryData *)PF_LOCK_HANDLE(left_arbH),
                            *out_arb_data = (ArbitraryData *)PF_LOCK_HANDLE(*interpPH);
            
            CopyArbData(out_arb_data, in_arb_data);
            
            PF_UNLOCK_HANDLE(left_arbH);
            PF_UNLOCK_HANDLE(*interpPH);
        }
    }
    
    return err;
}


static PF_Err ArbCompare(PF_InData *in_data, PF_OutData *out_data,
    void                *refconPV,
    PF_ArbitraryH       a_arbH,
    PF_ArbitraryH       b_arbH,
    PF_ArbCompareResult *compareP)
{
    PF_Err  err     = PF_Err_NONE;
    
    if(a_arbH && b_arbH)
    {
        ArbitraryData *a_data = (ArbitraryData *)PF_LOCK_HANDLE(a_arbH),
                        *b_data = (ArbitraryData *)PF_LOCK_HANDLE(b_arbH);
        
        
        if( a_data->version == b_data->version &&
            a_data->action == b_data->action &&
            a_data->invert == b_data->invert &&
            a_data->source == b_data->source &&
            a_data->interpolation == b_data->interpolation &&
            !strcmp(a_data->path, b_data->path) &&
            !strcmp(a_data->input, b_data->input) &&
            !strcmp(a_data->output, b_data->output) &&
            !strcmp(a_data->transform, b_data->transform) &&
            !strcmp(a_data->device, b_data->device) &&
            !strcmp(a_data->look, b_data->look) )
        {
            *compareP = PF_ArbCompare_EQUAL;
        }
        else
        {
            *compareP = PF_ArbCompare_NOT_EQUAL;
        }
        
        
        PF_UNLOCK_HANDLE(a_arbH);
        PF_UNLOCK_HANDLE(b_arbH);
    }
    
    return err;
}


PF_Err HandleArbitrary(
    PF_InData           *in_data,
    PF_OutData          *out_data,
    PF_ParamDef         *params[],
    PF_LayerDef         *output,
    PF_ArbParamsExtra   *extra)
{
    PF_Err  err     = PF_Err_NONE;
    
    if(extra->id == OCIO_DATA_ID)
    {
        switch(extra->which_function)
        {
            case PF_Arbitrary_NEW_FUNC:
                err = ArbNewDefault(in_data, out_data,
                                    extra->u.new_func_params.refconPV,
                                    extra->u.new_func_params.arbPH);
                break;
            case PF_Arbitrary_DISPOSE_FUNC:
                err = ArbDispose(in_data, out_data,
                                    extra->u.dispose_func_params.refconPV,
                                    extra->u.dispose_func_params.arbH);
                break;
            case PF_Arbitrary_COPY_FUNC:
                err = ArbCopy(in_data, out_data, extra->u.copy_func_params.refconPV,
                                extra->u.copy_func_params.src_arbH,
                                extra->u.copy_func_params.dst_arbPH);
                break;
            case PF_Arbitrary_FLAT_SIZE_FUNC:
                err = ArbFlatSize(in_data, out_data,
                                    extra->u.flat_size_func_params.refconPV,
                                    extra->u.flat_size_func_params.arbH,
                                    extra->u.flat_size_func_params.flat_data_sizePLu);
                break;
            case PF_Arbitrary_FLATTEN_FUNC:
                err = ArbFlatten(in_data, out_data,
                                    extra->u.flatten_func_params.refconPV,
                                    extra->u.flatten_func_params.arbH,
                                    extra->u.flatten_func_params.buf_sizeLu,
                                    extra->u.flatten_func_params.flat_dataPV);
                break;
            case PF_Arbitrary_UNFLATTEN_FUNC:
                err = ArbUnFlatten(in_data, out_data,
                                    extra->u.unflatten_func_params.refconPV,
                                    extra->u.unflatten_func_params.buf_sizeLu,
                                    extra->u.unflatten_func_params.flat_dataPV,
                                    extra->u.unflatten_func_params.arbPH);
                break;
            case PF_Arbitrary_INTERP_FUNC:
                err = ArbInterpolate(in_data, out_data,
                                        extra->u.interp_func_params.refconPV,
                                        extra->u.interp_func_params.left_arbH,
                                        extra->u.interp_func_params.right_arbH,
                                        extra->u.interp_func_params.tF,
                                        extra->u.interp_func_params.interpPH);
                break;
            case PF_Arbitrary_COMPARE_FUNC:
                err = ArbCompare(in_data, out_data,
                                    extra->u.compare_func_params.refconPV,
                                    extra->u.compare_func_params.a_arbH,
                                    extra->u.compare_func_params.b_arbH,
                                    extra->u.compare_func_params.compareP);
                break;
            // these are necessary for copying and pasting keyframes
            // for now, we better not be called to do this
            case PF_Arbitrary_PRINT_SIZE_FUNC:
                assert(FALSE);
                break;
            case PF_Arbitrary_PRINT_FUNC:
                assert(FALSE);
                break;
            case PF_Arbitrary_SCAN_FUNC:
                assert(FALSE);
                break;
        }
    }
    
    
    return err;
}