#include "FileManager.h"
#include "Window.h"


bool FileManager::writeTriangle(xmlTextWriterPtr writer, const Triangle &triangle, float height) {
  // <triangle>
  if(xmlTextWriterStartElement(writer, (xmlChar*)"triangle") < 0)
    return false;
  
  //if(xmlTextWriterWriteAttribute(writer, (xmlChar*)"texture", (xmlChar*)"t0") < 0)
  //  return false;
  
  float y = 0.0f;
  if(triangle.getDirection() == Triangle::CW) y = height;
  
  if(!writeVertex(writer, triangle.getVertexA().getX(), y, triangle.getVertexA().getY()))
    return false;
  //if(!writeTexCoords(writer, triangle.getVertexA().getX(), triangle.getVertexA().getY()))
  //  return false;
  
  if(!writeVertex(writer, triangle.getVertexB().getX(), y, triangle.getVertexB().getY()))
    return false;
  //if(!writeTexCoords(writer, triangle.getVertexB().getX(), triangle.getVertexB().getY()))
  //  return false;
  
  if(!writeVertex(writer, triangle.getVertexC().getX(), y, triangle.getVertexC().getY()))
    return false;
  //if(!writeTexCoords(writer, triangle.getVertexC().getX(), triangle.getVertexC().getY()))
  //  return false;
  
  // </triangle>
  if(xmlTextWriterEndElement(writer) < 0)
    return false;
  
  // <triangle>
  if(xmlTextWriterStartElement(writer, (xmlChar*)"triangle") < 0)
    return false;
  
  //if(xmlTextWriterWriteAttribute(writer, (xmlChar*)"texture", (xmlChar*)"t0") < 0)
  //  return false;
  
  y = height;
  if(triangle.getDirection() == Triangle::CW) y = 0.0f;
  
  if(!writeVertex(writer, triangle.getVertexC().getX(), y, triangle.getVertexC().getY()))
    return false;
  //if(!writeTexCoords(writer, triangle.getVertexC().getX(), triangle.getVertexC().getY()))
  //  return false;
  
  if(!writeVertex(writer, triangle.getVertexB().getX(), y, triangle.getVertexB().getY()))
    return false;
  //if(!writeTexCoords(writer, triangle.getVertexB().getX(), triangle.getVertexB().getY()))
  //  return false;
  
  if(!writeVertex(writer, triangle.getVertexA().getX(), y, triangle.getVertexA().getY()))
    return false;
  //if(!writeTexCoords(writer, triangle.getVertexA().getX(), triangle.getVertexA().getY()))
  //  return false;
  
  // </triangle>
  if(xmlTextWriterEndElement(writer) < 0)
    return false;
  
  return true;
}

bool FileManager::writeSide(xmlTextWriterPtr writer, const Vertex &v1, const Vertex &v2, float height) {
  // <triangle>
  if(xmlTextWriterStartElement(writer, (xmlChar*)"triangle") < 0)
    return false;
  
  //if(xmlTextWriterWriteAttribute(writer, (xmlChar*)"texture", (xmlChar*)"t0") < 0)
  //  return false;
  
  if(!writeVertex(writer, v1.getX(), 0, v1.getY()))
    return false;
  if(!writeTexCoords(writer, v1.getX(), v1.getY()))
    return false;
  
  if(!writeVertex(writer, v2.getX(), 0, v2.getY()))
    return false;
  if(!writeTexCoords(writer, v2.getX(), v2.getY()))
    return false;
  
  if(!writeVertex(writer, v2.getX(), height, v2.getY()))
      return false;
  if(!writeTexCoords(writer, v2.getX(), v2.getY()))
    return false;
  
  // </triangle>
  if(xmlTextWriterEndElement(writer) < 0)
    return false;
  
  // <triangle>
  if(xmlTextWriterStartElement(writer, (xmlChar*)"triangle") < 0)
    return false;
  
  //if(xmlTextWriterWriteAttribute(writer, (xmlChar*)"texture", (xmlChar*)"t0") < 0)
  //  return false;
  
  if(!writeVertex(writer, v2.getX(), height, v2.getY()))
    return false;
  if(!writeTexCoords(writer, v2.getX(), v2.getY()))
    return false;
  
  if(!writeVertex(writer, v1.getX(), height, v1.getY()))
    return false;
  if(!writeTexCoords(writer, v1.getX(), v1.getY()))
    return false;
  
  if(!writeVertex(writer, v1.getX(), 0, v1.getY()))
      return false;
    if(!writeTexCoords(writer, v1.getX(), v1.getY()))
      return false;
  
  // </triangle>
  if(xmlTextWriterEndElement(writer) < 0)
    return false;
  
  return true;
}

bool FileManager::writeVertex(xmlTextWriterPtr writer, float x, float y, float z) {
  // <vertex>
  if(xmlTextWriterStartElement(writer, (xmlChar*)"vertex") < 0)
    return false;
  
  if(xmlTextWriterWriteFormatAttribute(writer, (xmlChar*)"x", "%f", x) < 0)
    return false;
  
  if(xmlTextWriterWriteFormatAttribute(writer, (xmlChar*)"y", "%f", y) < 0)
    return false;
  
  if(xmlTextWriterWriteFormatAttribute(writer, (xmlChar*)"z", "%f", z) < 0)
    return false;
  
  // </vertex>
  if(xmlTextWriterEndElement(writer) < 0)
    return false;
  
  return true;
}

bool FileManager::writeTexCoords(xmlTextWriterPtr writer, float s, float t) {
  // <texcoords>
  if(xmlTextWriterStartElement(writer, (xmlChar*)"texcoords") < 0)
    return false;
  
  if(xmlTextWriterWriteFormatAttribute(writer, (xmlChar*)"s", "%f", s) < 0)
    return false;
  
  if(xmlTextWriterWriteFormatAttribute(writer, (xmlChar*)"t", "%f", t) < 0)
    return false;
  
  // </texcoords>
  if(xmlTextWriterEndElement(writer) < 0)
    return false;
  
  return true;
}

FileManager::FileManager(Window *window) {
  this->window = window;
  
  filename = NULL;
  dirty = false;
}

FileManager::~FileManager() {
  if(filename)
    g_free(filename);
}

bool FileManager::save(GtkWindow *parent) {
  if(filename == NULL)
    return saveAs(parent);
  
  return write();
}

bool FileManager::saveAs(GtkWindow *parent) {
  GtkWidget *dialog = gtk_file_chooser_dialog_new(NULL, parent, GTK_FILE_CHOOSER_ACTION_SAVE,
      GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT, NULL);
  
  if(filename)
    gtk_file_chooser_set_filename(GTK_FILE_CHOOSER(dialog), filename);
  else
    gtk_file_chooser_set_current_name(GTK_FILE_CHOOSER(dialog), "level.lvl");
  
  if(gtk_dialog_run(GTK_DIALOG(dialog)) != GTK_RESPONSE_ACCEPT) {
    gtk_widget_destroy(dialog);
    return false;
  }
  
  if(filename)
    g_free(filename);
  
  filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
  
  gtk_widget_destroy(dialog);
  
  if(!filename)
    return false;
  
 return write();
}

bool FileManager::write() {
  xmlTextWriterPtr writer;
  
  writer = xmlNewTextWriterFilename(filename, 9);
  if(!writer)
    return false;
  
  if(xmlTextWriterStartDocument(writer, NULL, "UTF-8", NULL) < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  if(xmlTextWriterStartDTD(writer, (xmlChar*)"level", (xmlChar*)"-//libzoom//DTD level 0.1//EN", (xmlChar*)"level.dtd") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  if(xmlTextWriterSetIndent(writer, 1) < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  if(xmlTextWriterSetIndentString(writer, (xmlChar*)"  ") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  if(xmlTextWriterEndDTD(writer) < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  // <level>
  if(xmlTextWriterStartElement(writer, (xmlChar*)"level") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  // <info>
  if(xmlTextWriterStartElement(writer, (xmlChar*)"info") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  if(xmlTextWriterWriteElement(writer, (xmlChar*)"name", (xmlChar*)"Level") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  if(xmlTextWriterWriteElement(writer, (xmlChar*)"desc", (xmlChar*)"Description") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  // <start>
  if(xmlTextWriterStartElement(writer, (xmlChar*)"start") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  if(xmlTextWriterWriteAttribute(writer, (xmlChar*)"x", (xmlChar*)"0.0") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  if(xmlTextWriterWriteAttribute(writer, (xmlChar*)"y", (xmlChar*)"2.0") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  if(xmlTextWriterWriteAttribute(writer, (xmlChar*)"z", (xmlChar*)"0.0") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  // </start>
  if(xmlTextWriterEndElement(writer) < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  // </info>
  if(xmlTextWriterEndElement(writer) < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  // <rooms>
  if(xmlTextWriterStartElement(writer, (xmlChar*)"rooms") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  for(Level::iterator room = window->getLevel().begin(); room != window->getLevel().end(); room++) {
    // <room>
    if(xmlTextWriterStartElement(writer, (xmlChar*)"room") < 0) {
      xmlFreeTextWriter(writer);
      return false;
    }
    
    if(xmlTextWriterWriteAttribute(writer, (xmlChar*)"id", (xmlChar*)room->getName().c_str()) < 0) {
      xmlFreeTextWriter(writer);
      return false;
    }
    
    std::vector<Triangle> triangles;
    room->triangulate(triangles);
    
    for(std::vector<Triangle>::iterator triangle = triangles.begin(); triangle != triangles.end(); triangle++) {
      if(!writeTriangle(writer, *triangle, room->getHeight())) {
        xmlFreeTextWriter(writer);
        return false;
      }
    }
    
    std::vector<Vertex> vertices = *room;
    
    if(room->getDirection() == Triangle::CCW) {
      vertices = std::vector<Vertex>(vertices.rbegin(), vertices.rend());
    }
    
    for(std::vector<Vertex>::iterator v1 = vertices.begin(); v1 != vertices.end(); v1++) {
      std::vector<Vertex>::iterator v2 = v1+1;
      if(v2 == vertices.end()) v2 = vertices.begin();
      
      if(!writeSide(writer, *v1, *v2, room->getHeight())) {
        xmlFreeTextWriter(writer);
        return false;
      }
    }
    
    // </room>
    if(xmlTextWriterEndElement(writer) < 0) {
      xmlFreeTextWriter(writer);
      return false;
    }
  }
  
  // </rooms>
  if(xmlTextWriterEndElement(writer) < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  // <gates>
  if(xmlTextWriterStartElement(writer, (xmlChar*)"gates") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  // </gates>
  if(xmlTextWriterEndElement(writer) < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  // <textures>
  if(xmlTextWriterStartElement(writer, (xmlChar*)"textures") < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  // </textures>
  if(xmlTextWriterEndElement(writer) < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  // </level>
  if(xmlTextWriterEndElement(writer) < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  if(xmlTextWriterEndDocument(writer) < 0) {
    xmlFreeTextWriter(writer);
    return false;
  }
  
  xmlFreeTextWriter(writer);
  
  return true;
}