/*  Starshatter OpenSource Distribution
    Copyright (c) 1997-2004, Destroyer Studios LLC.
    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 "Destroyer Studios" 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 HOLDER 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.

    SUBSYSTEM:    Magic.exe
    FILE:         MagicDoc.cpp
    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    Implementation of the MagicDoc class
*/

#include "stdafx.h"
#include "Magic.h"

#include "MagicDoc.h"
#include "ModelFileMAG.h"
#include "ModelFileOBJ.h"
#include "ModelFile3DS.h"
#include "Selection.h"
#include "Selector.h"
#include "Editor.h"
#include "Command.h"

#include "Bitmap.h"
#include "Color.h"
#include "D3DXImage.h"
#include "Geometry.h"
#include "Pcx.h"
#include "Polygon.h"
#include "Solid.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

// +--------------------------------------------------------------------+

IMPLEMENT_DYNCREATE(MagicDoc, CDocument)

BEGIN_MESSAGE_MAP(MagicDoc, CDocument)
    //{{AFX_MSG_MAP(MagicDoc)
    ON_COMMAND(ID_SURFACE_OPTIMIZE, OnSurfaceOptimize)
    ON_COMMAND(ID_SURFACE_EXPLODE, OnSurfaceExplode)
    ON_UPDATE_COMMAND_UI(ID_SURFACE_OPTIMIZE, OnUpdateSurfaceOptimize)
    ON_UPDATE_COMMAND_UI(ID_SURFACE_EXPLODE, OnUpdateSurfaceExplode)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

// +--------------------------------------------------------------------+

MagicDoc::MagicDoc()
  : solid(0), selection(0)
{
   solid     = new Solid;
   selection = new Selection;
   selector  = new Selector(selection);
   editor    = new Editor(this);
}

MagicDoc::~MagicDoc()
{
   if (editor)    delete editor;
   if (selector)  delete selector;
   if (selection) delete selection;
   if (solid)     delete solid;
}

// +--------------------------------------------------------------------+

void
MagicDoc::InitCommandStack()
{
   nundo = 0;
   commands.destroy();
}

void
MagicDoc::Exec(Command* command)
{
   int nredo = commands.size() - nundo;
   
   while (nredo) {
      delete commands.removeIndex(commands.size()-1);
      nredo--;
   }

   if (nundo < 100) {
      nundo++;
   }
   else {
      delete commands.removeIndex(0);
   }

   command->Do();
   commands.append(command);
}

int
MagicDoc::NumUndo() const
{
   return nundo;
}

int
MagicDoc::NumRedo() const
{
   return commands.size() - nundo;
}

const char*
MagicDoc::GetUndoName() const
{
   if (nundo > 0 && nundo <= commands.size())
      return commands[nundo-1]->Name();
   else
      return "";
}

const char*
MagicDoc::GetRedoName() const
{
   if (nundo >= 0 && nundo < commands.size())
      return commands[nundo]->Name();
   else
      return "";
}

void
MagicDoc::Undo()
{
   if (nundo > 0 && nundo <= commands.size())
      commands[--nundo]->Undo();
}

void
MagicDoc::Redo()
{
   if (nundo >= 0 && nundo < commands.size())
      commands[nundo++]->Do();
}

// +--------------------------------------------------------------------+

BOOL MagicDoc::OnNewDocument()
{
    if (!CDocument::OnNewDocument())
        return FALSE;

   InitCommandStack();

   if (solid) delete solid;
   solid = new Solid;

   if (selection)
      selection->Clear();

    return TRUE;
}

// +--------------------------------------------------------------------+

void MagicDoc::Serialize(CArchive& ar)
{
}

// +--------------------------------------------------------------------+

#ifdef _DEBUG
void MagicDoc::AssertValid() const
{
    CDocument::AssertValid();
}

void MagicDoc::Dump(CDumpContext& dc) const
{
    CDocument::Dump(dc);
}
#endif //_DEBUG

// +--------------------------------------------------------------------+

BOOL MagicDoc::OnSaveDocument(LPCTSTR path_name) 
{
   SetModifiedFlag(FALSE);

   ModelFileMAG mod_file(path_name);
   mod_file.Save(solid->GetModel());

   SetModifiedFlag(FALSE);
   UpdateAllViews(NULL);
   return TRUE;
}

BOOL MagicDoc::OnOpenDocument(LPCTSTR path_name) 
{
   FILE* fp = fopen(path_name, "rb");
   if (!fp) {
      ::MessageBox(0, "Open Failed:  could not open file", "ERROR", MB_OK);
      return FALSE;
   }

   int version = 1;
   char file_id[5];
   fread(file_id, 4, 1, fp);
   file_id[4] = '\0';
   fclose(fp);

   if (strncmp(file_id, "MAG", 3)) {
      ::MessageBox(0, "Open Failed:  Invalid file type", "ERROR", MB_OK);
      return FALSE;
   }

   switch (file_id[3]) {
   case '6':   version = 6;   break;
   case '5':   version = 5;   break;
   default:    version = 0;   break;
   }

   if (version < 5 || version > 6) {
      ::MessageBox(0, "Open Failed:  Unsupported version", "ERROR", MB_OK);
      return FALSE;
   }

   DeleteContents();

   ModelFileMAG mod_file(path_name);
   solid->Load(&mod_file);
   solid->CreateShadows();

   SetModifiedFlag(FALSE);
   UpdateAllViews(NULL);
   return TRUE;
}

bool
MagicDoc::ImportFile(LPCTSTR path_name)
{
   if (strstr(path_name, ".obj") || strstr(path_name, ".OBJ")) {
      ModelFileOBJ obj_file(path_name);

      if (solid->GetModel()) {
         Solid* s = new Solid;

         if (s->Load(&obj_file)) {
            // todo: insert command here
            Model* orig = solid->GetModel();
            Model* imported = s->GetModel();

            orig->GetMaterials().append(imported->GetMaterials());
            orig->GetSurfaces().append(imported->GetSurfaces());
            orig->OptimizeMaterials();

            imported->GetMaterials().clear();
            imported->GetSurfaces().clear();

            SetModifiedFlag(FALSE);
            UpdateAllViews(NULL);
            delete s;
            return true;
         }

         delete s;
      }
      else {
         if (solid->Load(&obj_file)) {
            SetModifiedFlag(FALSE);
            UpdateAllViews(NULL);
            return true;
         }
      }

      return false;
   }

   if (strstr(path_name, ".3ds") || strstr(path_name, ".3DS")) {
      ModelFile3DS model_file(path_name);

      if (solid->GetModel()) {
         Solid* s = new Solid;

         if (s->Load(&model_file)) {
            // todo: insert command here
            Model* orig = solid->GetModel();
            Model* imported = s->GetModel();

            orig->GetMaterials().append(imported->GetMaterials());
            orig->GetSurfaces().append(imported->GetSurfaces());
            orig->OptimizeMaterials();

            imported->GetMaterials().clear();
            imported->GetSurfaces().clear();

            SetModifiedFlag(FALSE);
            UpdateAllViews(NULL);
            delete s;
            return true;
         }

         delete s;
      }
      else {
         if (solid->Load(&model_file)) {
            SetModifiedFlag(FALSE);
            UpdateAllViews(NULL);
            return true;
         }
      }

      return false;
   }

   FILE* fp = fopen(path_name, "rb");
   if (!fp) {
      ::MessageBox(0, "Import Failed:  could not open file", "ERROR", MB_OK);
      return false;
   }

   int version = 1;
   char file_id[5];
   fread(file_id, 4, 1, fp);
   file_id[4] = '\0';
   fclose(fp);

   if (strncmp(file_id, "MAG", 3)) {
      ::MessageBox(0, "Open Failed:  Invalid file type", "ERROR", MB_OK);
      return false;
   }

   switch (file_id[3]) {
   case '6':   version = 6;   break;
   case '5':   version = 5;   break;
   default:    version = 0;   break;
   }

   if (version < 5 || version > 6) {
      ::MessageBox(0, "Open Failed:  Unsupported version", "ERROR", MB_OK);
      return false;
   }

   ModelFileMAG mag_file(path_name);

   if (solid->GetModel()) {
      Solid* s = new Solid;
      if (s->Load(&mag_file)) {
         // todo: insert command here
         Model* orig = solid->GetModel();
         Model* imported = s->GetModel();

         orig->GetMaterials().append(imported->GetMaterials());
         orig->GetSurfaces().append(imported->GetSurfaces());
         orig->OptimizeMaterials();

         imported->GetMaterials().clear();
         imported->GetSurfaces().clear();

         SetModifiedFlag(FALSE);
         UpdateAllViews(NULL);
         delete s;
         return true;
      }

      delete s;
   }
   else {
      InitCommandStack();

      if (solid->Load(&mag_file)) {
         SetModifiedFlag(FALSE);
         UpdateAllViews(NULL);
         return true;
      }
   }

   return false;
}

bool
MagicDoc::ExportFile(LPCTSTR path_name)
{
   if (!solid->GetModel())
      return false;

   if (strstr(path_name, ".obj") || strstr(path_name, ".OBJ")) {
      ModelFileOBJ obj_file(path_name);
      obj_file.Save(solid->GetModel());
      return true;
   }

   if (strstr(path_name, ".3ds") || strstr(path_name, ".3DS")) {
      return false;
   }

   if (strstr(path_name, ".mag") || strstr(path_name, ".MAG")) {
      ModelFileMAG mod_file(path_name);
      mod_file.Save(solid->GetModel());
      return true;
   }

   return false;
}

// +--------------------------------------------------------------------+

int LoadBuffer(const char* filename, BYTE*& buf, bool null_terminate)
{
   buf = 0;

   FILE* f = ::fopen(filename, "rb");

   if (f) {
      ::fseek(f, 0, SEEK_END);
      int len = ftell(f);
      ::fseek(f, 0, SEEK_SET);

      if (null_terminate) {
         buf = new BYTE[len+1];
         if (buf)
            buf[len] = 0;
      }

      else {
         buf = new BYTE[len];
      }

      if (buf)
         ::fread(buf, len, 1, f);

      ::fclose(f);

      return len;
   }

   return 0;
}

// +--------------------------------------------------------------------+

void MagicDoc::DeleteContents() 
{
    CDocument::DeleteContents();
   InitCommandStack();

   if (solid) {
      delete solid;
      solid = new Solid;
   }

   if (selection)
      selection->Clear();
}

// +--------------------------------------------------------------------+

int LoadTexture(const char* fname, Bitmap*& bitmap, int type)
{
   int   result = 0;
   
   if (!fname || !*fname)
      return result;

   bitmap = Bitmap::CheckCache(fname);

   if (!bitmap) {
      bool pcx_file = strstr(fname, ".pcx") || strstr(fname, ".PCX");

      // handle PCX formats:
      if (pcx_file) {
         PcxImage pcx;

         if (pcx.Load((char*) fname) == PCX_OK) {
            bitmap = new Bitmap;

            // 32-bit image
            if (pcx.himap) {
               bitmap->CopyHighColorImage(pcx.width, pcx.height, pcx.himap);
            }

            // 8-bit image, check for 32-bit image as well
            else if (pcx.bitmap) {
               bitmap->CopyImage(pcx.width, pcx.height, pcx.bitmap);

               char tmp[256];
               int  len = strlen(fname);
               bool found = false;

               ZeroMemory(tmp, sizeof(tmp));

               for (int i = 0; i < len && !found; i++) {
                  if (strstr(fname + i, ".pcx") == (fname+i)) {
                     found = true;
                  }
                  else {
                     tmp[i] = fname[i];
                  }
               }

               if (found) {
                  strcat_s(tmp, "+.pcx");
                  if (pcx.Load(tmp) == PCX_OK && pcx.himap != 0) {
                     bitmap->CopyHighColorImage(pcx.width, pcx.height, pcx.himap);
                  }
               }
            }
         }
      }

      // for all other formats, use D3DX:
      else {
         D3DXImage d3dx;
         if (d3dx.Load((char*) fname)) {
            bitmap = new Bitmap;
            bitmap->CopyHighColorImage(d3dx.width, d3dx.height, d3dx.image);
         }
      }

      if (bitmap) {
         LoadAlpha(fname, *bitmap, type);

         bitmap->SetFilename(fname);
         bitmap->SetType(type);
         bitmap->MakeTexture();

         Bitmap::AddToCache(bitmap);
      }
   }

   return result;
}

int LoadAlpha(const char* name, Bitmap& bitmap, int type)
{
   PcxImage    pcx;
   D3DXImage   d3dx;
   bool        pcx_file = strstr(name, ".pcx") || strstr(name, ".PCX");
   bool        bmp_file = strstr(name, ".bmp") || strstr(name, ".BMP");
   bool        jpg_file = strstr(name, ".jpg") || strstr(name, ".JPG");
   bool        png_file = strstr(name, ".png") || strstr(name, ".PNG");
   bool        tga_file = strstr(name, ".tga") || strstr(name, ".TGA");

   // check for an associated alpha-only (grayscale) bitmap:
   char filename[256];
   strcpy_s(filename, name);

   char* dot = strrchr(filename, '.');
   if (dot && pcx_file)
      strcpy(dot, "@.pcx");
   else if (dot && bmp_file)
      strcpy(dot, "@.bmp");
   else if (dot && jpg_file)
      strcpy(dot, "@.jpg");
   else if (dot && png_file)
      strcpy(dot, "@.png");
   else if (dot && tga_file)
      strcpy(dot, "@.tga");
   else
      return 0;

   // first try to load from current directory:
   bool loaded = false;
   
   if (pcx_file)
      loaded = pcx.Load(filename) == PCX_OK;

   else
      loaded = d3dx.Load(filename);

   // now copy the alpha values into the bitmap:
   if (loaded) {
      if (pcx_file && pcx.bitmap) {
         bitmap.CopyAlphaImage(pcx.width, pcx.height, pcx.bitmap);
      }
      else if (pcx_file && pcx.himap) {
         bitmap.CopyAlphaRedChannel(pcx.width, pcx.height, pcx.himap);
      }
      else if (d3dx.image) {
         bitmap.CopyAlphaRedChannel(d3dx.width, d3dx.height, d3dx.image);
      }
   }

   return 0;
}


void MagicDoc::OnSurfaceOptimize() 
{
   if (solid && solid->GetModel()) {
      solid->GetModel()->OptimizeMesh();
      solid->InvalidateSurfaceData();
      solid->InvalidateSegmentData();
   }
}

void MagicDoc::OnUpdateSurfaceOptimize(CCmdUI* pCmdUI) 
{
   pCmdUI->Enable(solid && solid->GetModel());
}

void MagicDoc::OnSurfaceExplode() 
{
   if (solid && solid->GetModel()) {
      solid->GetModel()->ExplodeMesh();
      solid->InvalidateSurfaceData();
      solid->InvalidateSegmentData();
   }
}

void MagicDoc::OnUpdateSurfaceExplode(CCmdUI* pCmdUI) 
{
   pCmdUI->Enable(solid && solid->GetModel());
}