/*
 * Copyright (c) 2020 Samsung Electronics Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

// CLASS HEADER
#include "contact-card-layouter.h"

// INTERNAL INCLUDES
#include "contact-card.h"

using namespace Dali;

namespace
{
const float DEFAULT_PADDING = 25.0f;

const float MINIMUM_ITEMS_PER_ROW_OR_COLUMN(3.0f);

const float   HEADER_HEIGHT_TO_UNFOLDED_SIZE_RATIO(0.1f);
const Vector2 HEADER_FOLDED_POSITION_AS_RATIO_OF_SIZE(-0.05f, -1.5f);
const Vector2 HEADER_UNFOLDED_POSITION(Vector2::ZERO);

const float   IMAGE_SIZE_AS_RATIO_TO_FOLDED_SIZE(0.5f);
const Vector2 IMAGE_FOLDED_POSITION_AS_RATIO_OF_SIZE(0.5f, 0.25f);

const float FOLDED_TEXT_POSITION_AS_RATIO_OF_IMAGE_SIZE(1.01f);
} // unnamed namespace

ContactCardLayouter::ContactCardLayouter()
: mContactCardLayoutInfo(),
  mContactCards(),
  mLastPosition(),
  mPositionIncrementer(),
  mItemsPerRow(0),
  mInitialized(false)
{
}

ContactCardLayouter::~ContactCardLayouter()
{
  // Nothing to do as ContactCardContainer uses intrusive pointers so they will be automatically deleted
}

void ContactCardLayouter::AddContact(Dali::Window window, const std::string& contactName, const std::string& contactAddress, const std::string& imagePath)
{
  if(!mInitialized)
  {
    // Set up the common layouting info shared between all contact cards when first called

    mContactCardLayoutInfo.unfoldedPosition = mContactCardLayoutInfo.padding = Vector2(DEFAULT_PADDING, DEFAULT_PADDING);
    mContactCardLayoutInfo.unfoldedSize                                      = Vector2(window.GetSize()) - mContactCardLayoutInfo.padding * (MINIMUM_ITEMS_PER_ROW_OR_COLUMN - 1.0f);

    // Calculate the size of the folded card (use the minimum of width/height as size)
    mContactCardLayoutInfo.foldedSize       = (mContactCardLayoutInfo.unfoldedSize - (mContactCardLayoutInfo.padding * (MINIMUM_ITEMS_PER_ROW_OR_COLUMN - 1.0f))) / MINIMUM_ITEMS_PER_ROW_OR_COLUMN;
    mContactCardLayoutInfo.foldedSize.width = mContactCardLayoutInfo.foldedSize.height = std::min(mContactCardLayoutInfo.foldedSize.width, mContactCardLayoutInfo.foldedSize.height);

    // Set the size and positions of the header
    mContactCardLayoutInfo.headerSize.width       = mContactCardLayoutInfo.unfoldedSize.width;
    mContactCardLayoutInfo.headerSize.height      = mContactCardLayoutInfo.unfoldedSize.height * HEADER_HEIGHT_TO_UNFOLDED_SIZE_RATIO;
    mContactCardLayoutInfo.headerFoldedPosition   = mContactCardLayoutInfo.headerSize * HEADER_FOLDED_POSITION_AS_RATIO_OF_SIZE;
    mContactCardLayoutInfo.headerUnfoldedPosition = HEADER_UNFOLDED_POSITION;

    // Set the image size and positions
    mContactCardLayoutInfo.imageSize               = mContactCardLayoutInfo.foldedSize * IMAGE_SIZE_AS_RATIO_TO_FOLDED_SIZE;
    mContactCardLayoutInfo.imageFoldedPosition     = mContactCardLayoutInfo.imageSize * IMAGE_FOLDED_POSITION_AS_RATIO_OF_SIZE;
    mContactCardLayoutInfo.imageUnfoldedPosition.x = mContactCardLayoutInfo.padding.width;
    mContactCardLayoutInfo.imageUnfoldedPosition.y = mContactCardLayoutInfo.headerSize.height + mContactCardLayoutInfo.padding.height;

    // Set the positions of the contact name
    mContactCardLayoutInfo.textFoldedPosition.x   = 0.0f;
    mContactCardLayoutInfo.textFoldedPosition.y   = mContactCardLayoutInfo.imageFoldedPosition.x + mContactCardLayoutInfo.imageSize.height * FOLDED_TEXT_POSITION_AS_RATIO_OF_IMAGE_SIZE;
    mContactCardLayoutInfo.textUnfoldedPosition.x = mContactCardLayoutInfo.padding.width;
    mContactCardLayoutInfo.textUnfoldedPosition.y = mContactCardLayoutInfo.imageUnfoldedPosition.y + mContactCardLayoutInfo.imageSize.height + mContactCardLayoutInfo.padding.height;

    // Figure out the positions of the contact cards
    mItemsPerRow           = (mContactCardLayoutInfo.unfoldedSize.width + mContactCardLayoutInfo.padding.width) / (mContactCardLayoutInfo.foldedSize.width + mContactCardLayoutInfo.padding.width);
    mLastPosition          = mContactCardLayoutInfo.unfoldedPosition;
    mPositionIncrementer.x = mContactCardLayoutInfo.foldedSize.width + mContactCardLayoutInfo.padding.width;
    mPositionIncrementer.y = mContactCardLayoutInfo.foldedSize.height + mContactCardLayoutInfo.padding.height;

    mInitialized = true;
  }

  // Create a new contact card and add to our container
  mContactCards.push_back(new ContactCard(window, mContactCardLayoutInfo, contactName, contactAddress, imagePath, NextCardPosition()));
}

const Vector2& ContactCardLayouter::NextCardPosition()
{
  size_t currentNumOfCards = mContactCards.size();

  if(currentNumOfCards)
  {
    if(currentNumOfCards % mItemsPerRow)
    {
      mLastPosition.x += mPositionIncrementer.x;
    }
    else // go to the next row
    {
      mLastPosition.x = mContactCardLayoutInfo.unfoldedPosition.x;
      mLastPosition.y += mPositionIncrementer.y;
    }
  }
  return mLastPosition;
}