#include "edit_expression_controller.h"
#include "app.h"
#include <assert.h>

namespace Calculation {

EditExpressionController::ContentView::ContentView(View * subview) :
  View(),
  m_mainView(subview),
  m_textField(nullptr, m_textBody, 255)
{
  m_textBody[0] = 0;
}

int EditExpressionController::ContentView::numberOfSubviews() const {
  return 2;
}

View * EditExpressionController::ContentView::subviewAtIndex(int index) {
  switch (index) {
    case 0:
      return m_mainView;
    case 1:
      return &m_textField;
    default:
      assert(false);
      return nullptr;
  }
}

void EditExpressionController::ContentView::layoutSubviews() {
  KDRect mainViewFram(0, 0, bounds().width(), bounds().height() - k_textFieldHeight);
  m_mainView->setFrame(mainViewFram);
  KDRect inputViewFram(0, bounds().height() - k_textFieldHeight, bounds().width(), k_textFieldHeight);
  m_textField.setFrame(inputViewFram);
}

TextField * EditExpressionController::ContentView::textField() {
  return &m_textField;
}

EditExpressionController::EditExpressionController(Responder * parentResponder, HistoryController * historyController, CalculationStore * calculationStore) :
  ViewController(parentResponder),
  m_contentView(historyController->view()),
  m_historyController(historyController),
  m_calculationStore(calculationStore)
{
  m_contentView.textField()->setParentResponder(this);
}

View * EditExpressionController::view() {
  return &m_contentView;
}

const char * EditExpressionController::title() const {
  return "EditExpressionController";
}

const char * EditExpressionController::textBody() {
  return m_contentView.textField()->textBuffer();
}

void EditExpressionController::setTextBody(const char * text) {
  m_contentView.textField()->setTextBuffer(text);
}

bool EditExpressionController::handleEvent(Ion::Events::Event event) {
  switch (event) {
    case Ion::Events::Event::ENTER:
    {
      Calculation * calculation = m_calculationStore->addEmptyCalculation();
      App * calculationApp = (App *)app();
      calculation->setContent(textBody(), calculationApp->globalContext());
      m_historyController->reload();
      m_contentView.textField()->setTextBuffer("");
      return true;
    }
    case Ion::Events::Event::ESC:
      return true;
    case Ion::Events::Event::UP_ARROW:
      app()->setFirstResponder(m_historyController);
      return true;
    default:
      return false;
  }
}

void EditExpressionController::didBecomeFirstResponder() {
  app()->setFirstResponder(m_contentView.textField());
}

void EditExpressionController::edit(const char * initialContent) {
  setTextBody(initialContent);
  app()->setFirstResponder(this);
}

}