/*  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:         UVMapView.cpp
    AUTHOR:       John DiCamillo


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

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

#include "MagicDoc.h"
#include "UVMapView.h"
#include "Selector.h"
#include "Selection.h"

#include "ActiveWindow.h"
#include "Color.h"
#include "Screen.h"
#include "Video.h"

DWORD GetRealTime();

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

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

UVMapView::UVMapView(Window* c)
   : View(c), material(0), zoom(1), x_offset(0), y_offset(0),
     nmarks(0), select_mode(SELECT_REPLACE), active(false)
{
}

UVMapView::~UVMapView()
{
}

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

const int BATCH_SIZE = 64;

void 
UVMapView::Refresh()
{
   video = Video::GetInstance();
   if (!video)
      return;

   window->FillRect(window->GetRect(), Color::LightGray);

   if (material && material->tex_diffuse) {
      Bitmap*  bmp = material->tex_diffuse;
      int      w   = bmp->Width();
      int      h   = bmp->Height();

      double   cx  = window->Width()  / 2 + x_offset;
      double   cy  = window->Height() / 2 + y_offset;

      int      x1  = (int) (cx - (zoom * w/2));
      int      x2  = (int) (cx + (zoom * w/2));
      int      y1  = (int) (cy - (zoom * h/2));
      int      y2  = (int) (cy + (zoom * h/2));

      window->DrawBitmap(x1, y1, x2, y2, bmp);

      ListIter<Poly> iter = polys;
      while (++iter) {
         Poly*       p     = iter.value();
         VertexSet*  vset  = p->vertex_set;

         if (p->material != material)
            continue;

         for (int i = 0; i < p->nverts; i++) {
            int    n1   = p->verts[i];
            int    n2   = p->verts[0];
            if (i < p->nverts-1)
               n2 = p->verts[i+1];

            double tu1  = vset->tu[n1];
            double tv1  = vset->tv[n1];
            double tu2  = vset->tu[n2];
            double tv2  = vset->tv[n2];

            x1 = (int) (cx + zoom * w * (tu1-0.5));
            x2 = (int) (cx + zoom * w * (tu2-0.5));
            y1 = (int) (cy + zoom * h * (tv1-0.5));
            y2 = (int) (cy + zoom * h * (tv2-0.5));

            window->DrawLine(x1,   y1,   x2,   y2,   Color::Yellow);

            if (IsSelected(p, i))
               window->FillRect(x1-3, y1-3, x1+3, y1+3, Color::Yellow);
            else
               window->DrawRect(x1-2, y1-2, x1+2, y1+2, Color::Yellow);
         }
      }
   }

   if (active && nmarks > 1) {
      float points[4*BATCH_SIZE + 4];

      for (int batch = 0; batch < nmarks; batch += BATCH_SIZE) {
         int end = batch + BATCH_SIZE;
         if (end > nmarks-1)
            end = nmarks-1;
         int nlines = end-batch;

         for (int i = 0; i < nlines; i++) {
            points[4*i+0] = (float) marks[batch + i].x;
            points[4*i+1] = (float) marks[batch + i].y;
            points[4*i+2] = (float) marks[batch + i + 1].x;
            points[4*i+3] = (float) marks[batch + i + 1].y;
         }

         video->DrawScreenLines(nlines, points, Color::Cyan);
      }
   }

   const char* title = "UV Editor";

   int  len = strlen(title);
   Rect r(6,4,200,20);

   r.x += window->GetRect().x;
   r.y += window->GetRect().y;

   video->DrawText(title, len, r, DT_LEFT|DT_SINGLELINE, Color::Black);

   r.x--;
   r.y--;

   video->DrawText(title, len, r, DT_LEFT|DT_SINGLELINE, Color::White);
}

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

void
UVMapView::UseMaterial(Material* m)
{
   if (material != m) {
      material = m;
      zoom     = 1;
      x_offset = 0;
      y_offset = 0;
   }
}

void 
UVMapView::UsePolys(List<Poly>& p)
{
   polys.clear();
   polys.append(p);
}

void
UVMapView::MoveBy(double dx, double dy)
{
   x_offset += dx;
   y_offset += dy;
}

void
UVMapView::DragBy(double dx, double dy)
{
   if (!material || !material->tex_diffuse || selverts.size() < 1)
      return;

   Bitmap*  bmp = material->tex_diffuse;
   double   w   = zoom * bmp->Width();
   double   h   = zoom * bmp->Height();
   float    du  = (float) (dx/w);
   float    dv  = (float) (dy/h);

   for (auto svi = selverts.begin(); svi != selverts.end(); ++svi) {
      DWORD value = *svi;
      DWORD p     = value >> 16;
      DWORD n     = value & 0xffff;

      Poly* poly = polys[p];
      if (poly && n < poly->nverts) {
         VertexSet*  vset = poly->vertex_set;
         int         v    = poly->verts[n];

         vset->tu[v] += du;
         vset->tv[v] += dv;
      }
   }
}

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

void
UVMapView::Clear()
{
   selverts.clear();
}

void
UVMapView::Begin(int seln_mode)
{
   nmarks      = 0;
   select_mode = seln_mode;
   active      = true;
}

void
UVMapView::AddMark(CPoint& p)
{
   if (nmarks < MAX_MARK)
      marks[nmarks++] = p;
}

void
UVMapView::End()
{
   active = false;

   // get the model:
   if (!nmarks || !material || !material->tex_diffuse) return;
   
   // if not adding to selection:
   if (select_mode == SELECT_REPLACE) {
      Clear();
   }

   Bitmap*  bmp = material->tex_diffuse;
   int      w   = bmp->Width();
   int      h   = bmp->Height();

   double   cx  = window->Width()  / 2 + x_offset;
   double   cy  = window->Height() / 2 + y_offset;


   // if only one mark:
   if (nmarks < 2) {
      // find all selected verts:
      ListIter<Poly> iter = polys;
      while (++iter) {
         Poly*       p     = iter.value();
         VertexSet*  vset  = p->vertex_set;

         for (int i = 0; i < p->nverts; i++) {
            int    n1   = p->verts[i];
            double tu1  = vset->tu[n1];
            double tv1  = vset->tv[n1];

            int x1 = (int) (cx + zoom * w * (tu1-0.5));
            int y1 = (int) (cy + zoom * h * (tv1-0.5));

            int dx = abs(marks[0].x - x1);
            int dy = abs(marks[0].y - y1);

            if (dx < 4 && dy < 4) {
               WORD  p_index = iter.index();
               DWORD value   = (p_index << 16) | i;

               if (select_mode == SELECT_REMOVE) {
                   for (auto svi = selverts.begin(); svi != selverts.end(); ++svi) {
                       if (*svi == value) {
                           selverts.erase(svi);
                       }
                   }
               }
               else {
                   bool contains = false;
                   for (auto svi = selverts.begin(); svi != selverts.end(); ++svi) {
                       if (*svi == value) {
                            contains = true;
                       }
                   }
                   if (!contains)
                       selverts.push_back(value);
               }
            }
         }
      }
   }

   // otherwise, build a region:
   else {
      CRgn rgn;
      rgn.CreatePolygonRgn(marks, nmarks, WINDING);

      // find all selected verts:
      ListIter<Poly> iter = polys;
      while (++iter) {
         Poly*       p     = iter.value();
         VertexSet*  vset  = p->vertex_set;

         for (int i = 0; i < p->nverts; i++) {
            int    n1   = p->verts[i];
            double tu1  = vset->tu[n1];
            double tv1  = vset->tv[n1];

            int x1 = (int) (cx + zoom * w * (tu1-0.5));
            int y1 = (int) (cy + zoom * h * (tv1-0.5));

            CPoint p(x1,y1);

            if (rgn.PtInRegion(p)) {
               WORD  p_index = iter.index();
               DWORD value   = (p_index << 16) | i;

               if (select_mode == SELECT_REMOVE) {
                   for (auto svi = selverts.begin(); svi != selverts.end(); ++svi) {
                       if (*svi == value)
                           selverts.erase(svi);
                   }
               }
               else {
                   bool contains = false;
                   for (auto svi = selverts.begin(); svi != selverts.end(); ++svi) {
                       if (*svi == value)
                           contains = true;
                   }
                   if (!contains)
                       selverts.push_back(value);
               }
            }
         }
      }
   }

   nmarks = 0;
}

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

void
UVMapView::SelectAll()
{
   selverts.clear();

   ListIter<Poly> iter = polys;
   while (++iter) {
      Poly* p = iter.value();

      if (p->material != material)
         continue;

      for (int i = 0; i < p->nverts; i++) {
         WORD  p_index = iter.index();
         DWORD value   = (p_index << 16) | i;
         selverts.push_back(value);
      }
   }
}

void
UVMapView::SelectNone()
{
   selverts.clear();
}

void
UVMapView::SelectInverse()
{
   ListIter<Poly> iter = polys;
   while (++iter) {
      Poly* p = iter.value();

      if (p->material != material)
         continue;

      for (int i = 0; i < p->nverts; i++) {
         WORD  p_index = iter.index();
         DWORD value   = (p_index << 16) | i;

         bool contains = false;
         auto svi = selverts.begin();
         for (; svi != selverts.end(); ++svi) {
             if (*svi == value) {
                 contains = true;
                 break;
             }
         }

         if (contains)
            selverts.erase(svi);
         else
             selverts.push_back(value);
      }
   }
}

bool
UVMapView::IsSelected(Poly* poly, WORD v)
{
   WORD p = polys.index(poly);
   DWORD value = (p << 16) | v;

   bool contains = false;
    
    for (auto svi = selverts.begin(); svi != selverts.end(); ++svi) {
        if (*svi == value)
            return true;
    }

   return false;
}

bool
UVMapView::WillSelect(CPoint& p)
{
   if (!material || !material->tex_diffuse)
      return false;
   
   Bitmap*  bmp = material->tex_diffuse;
   int      w   = bmp->Width();
   int      h   = bmp->Height();

   double   cx  = window->Width()  / 2 + x_offset;
   double   cy  = window->Height() / 2 + y_offset;

   // find first selected vert:
   ListIter<Poly> iter = polys;
   while (++iter) {
      Poly*       poly  = iter.value();
      VertexSet*  vset  = poly->vertex_set;

      for (int i = 0; i < poly->nverts; i++) {
         int    n1   = poly->verts[i];
         double tu1  = vset->tu[n1];
         double tv1  = vset->tv[n1];

         int x1 = (int) (cx + zoom * w * (tu1-0.5));
         int y1 = (int) (cy + zoom * h * (tv1-0.5));

         int dx = abs(p.x - x1);
         int dy = abs(p.y - y1);

         if (dx < 4 && dy < 4) {
            return true;
         }
      }
   }

   return false;
}