#include "engine/InputProcessor.h"

InputProcessor createInputProcessor()
{
	InputProcessor inputProcessor = { .tabButton		 = array_P_Button_Create(),
									  .tabTextInput		 = array_TextInput_Create(),
									  .selectedTextInput = NULL };
	SDL_StopTextInput();
	return inputProcessor;
}

void freeInputProcessor(InputProcessor* inputProcessor)
{
	array_P_Button_Free(&inputProcessor->tabButton);
}


InputElement interpretSDL_EventInput(InputProcessor* inputProcessor, const SDL_Event* event)
{
	switch (event->type)
	{
		case SDL_QUIT: return createInputElementUIQuit();
		case SDL_MOUSEBUTTONUP:
		{
			const SDL_Point mousePoint = { .x = event->button.x, .y = event->button.y };

			for (size_t i = 0; i < inputProcessor->tabButton.size; ++i)
			{
				P_Button* b = &inputProcessor->tabButton.elems[i];
				if (isHover(b))
				{
					b->onClick(b);
					break;
				}
			}
			bool textInputClicked = false;
			for (size_t i = 0; i < inputProcessor->tabTextInput.size; ++i)
			{
				TextInput* ti = &inputProcessor->tabTextInput.elems[i];
				if (SDL_PointInRect(&mousePoint, &ti->size))
				{
					if (inputProcessor->selectedTextInput == NULL)
					{
						SDL_StartTextInput();
					}
					else
					{
						inputProcessor->selectedTextInput->isActive = false;
					}
					inputProcessor->selectedTextInput			= ti;
					textInputClicked							= true;
					inputProcessor->selectedTextInput->isActive = true;
					inputProcessor->selectedTextInput->cursorPosition =
							strlen(inputProcessor->selectedTextInput->value);
					break;
				}
			}
			if (!textInputClicked && inputProcessor->selectedTextInput != NULL)
			{
				inputProcessor->selectedTextInput->isActive = false;
				inputProcessor->selectedTextInput			= NULL;

				SDL_StopTextInput();
			}
			return createInputElementNone();
		}
		case SDL_MOUSEMOTION:
		{
			for (size_t i = 0; i < inputProcessor->tabButton.size; ++i)
			{
				P_Button* b = &inputProcessor->tabButton.elems[i];
				int res		= isButtonInteractWithCursor(b, event->motion.x, event->motion.y);
				if (res != BUTTON_NOTHING)
				{
					return createInputElementButtonChanged(b, res);
				}
			}
			break;
		}
		case SDL_WINDOWEVENT:
			if (event->window.event == SDL_WINDOWEVENT_SIZE_CHANGED)
			{
				return createInputElementResizeWindow(event->window.data1, event->window.data2);
			}
			if (event->window.event == SDL_WINDOWEVENT_CLOSE)
			{
				return createInputElementCloseWindow();
			}
			break;
		case SDL_TEXTINPUT:
			addStringToInputTextValue(inputProcessor->selectedTextInput, event->text.text);
			return createInputElementTextInput(inputProcessor->selectedTextInput);
			break;
		case SDL_TEXTEDITING:
			inputProcessor->selectedTextInput->cursorPosition = event->edit.start;
			return createInputElementTextInput(inputProcessor->selectedTextInput);
			break;
		case SDL_KEYDOWN:
			if (inputProcessor->selectedTextInput != NULL && event->key.keysym.sym == SDLK_BACKSPACE)
			{
				removeCharacterToInputTextValueAtCursor(inputProcessor->selectedTextInput);
				return createInputElementTextInput(inputProcessor->selectedTextInput);
			}
			break;
	}

	return createInputElementNone();
}

InputElement proccessInput(InputProcessor* inputProcessor)
{
	SDL_Event event;
	if (!SDL_PollEvent(&event))
	{
		return createInputElementNone();
	}

	return interpretSDL_EventInput(inputProcessor, &event);
}