#include "editor.h"
#include <memory>

#include "text_view.h"
#include "gfx/types.h"
#include "ui/window_action.h"

Editor::Editor(void)
    : _should_close(false), _pending_action({ActionType::NONE}),
      _filename("untitled.txt") {
  _view = std::make_unique<TextView>(&_buffer, true, true, true);
  _menu_bar = std::make_unique<MenuBar>(25);
  _menu_bar->add_menu("File");
  _menu_bar->add_menu_item("File", "Save", [this]() {
    _pending_action = {ActionType::WRITE_FILE, _filename, _buffer.get_text()};
  });
}

Editor::Editor(const std::string& filename)
    : _should_close(false), _pending_action({ActionType::NONE}),
      _filename(filename) {
  _view = std::make_unique<TextView>(&_buffer, true, true, true);
  _menu_bar = std::make_unique<MenuBar>(25);
  _menu_bar->add_menu("File");
  _menu_bar->add_menu_item("File", "Save", [this]() {
    _pending_action = {ActionType::WRITE_FILE, _filename, _buffer.get_text()};
  });
}

Editor::~Editor(void) {}

void Editor::update(void) {
  /* Nothing to do yet. */
}

void Editor::handle_input(SDL_Event* event, int window_x, int window_y, int window_gl_y) {
  if(!event) return;

  _menu_bar->handle_event(event, window_x, window_y);

  /* We don't care about the return val here. RET is just newline. */
  if(event->type == SDL_EVENT_KEY_DOWN && event->key.key == SDLK_S &&
      (event->key.mod & SDL_KMOD_CTRL)) {
    /* C-S pressed, create a save action. */
    _pending_action = { ActionType::WRITE_FILE, _filename, _buffer.get_text() };
  } else {
    _view->handle_event(event);
  }
}

void Editor::render(const RenderContext& context, int x, int y_screen, int y_gl,
                    int width, int height) {
  int menu_bar_height = _menu_bar->get_height();
  int content_y = y_screen + menu_bar_height;
  int content_height = height - menu_bar_height;

  /* Pass 1: Main Bar Background.*/
  context.ui_renderer->begin_shapes();
  _menu_bar->render_bar_bg(context.ui_renderer, x, y_screen, width);
  context.ui_renderer->flush_shapes();

  /* Pass 2: Main text view. */
  context.ui_renderer->begin_text();
  _view->render_text_content(context.ui_renderer, _theme, x, content_y, width, content_height);
  context.ui_renderer->flush_text();

  /* Pass 3: Editor cursor. */
  if(context.show_cursor) {
    context.ui_renderer->begin_shapes();
    _view->render_cursor(context.ui_renderer, _theme, x, content_y, width, content_height);
    context.ui_renderer->flush_shapes();
  }

  /* Pass 4: Menu bar text and dropdown. */
  context.ui_renderer->begin_text();
  _menu_bar->render_bar_text(context.ui_renderer, x, y_screen, width);
  _menu_bar->render_dropdown(context.ui_renderer, x, y_screen, width);
  context.ui_renderer->flush_text();
}

void Editor::scroll(int amount, int content_height) {
  _view->scroll(amount, content_height);
}

bool Editor::should_close(void) {
  return _should_close;
}

void Editor::set_buffer_content(const std::string& content) {
  _buffer.set_text(content);
}

WindowAction Editor::get_pending_action(void) {
  WindowAction action = _pending_action;
  _pending_action.type = ActionType::NONE; /* Clear action. */
  return action;
}

const std::string& Editor::get_filename(void) const {
  return _filename;
}