#include "../Video.h"

#include <SDL_events.h>

#include "Events.h"
#include "../../util/Asm.h"

#define VGA_DAC_ADDR_RD 0x3c7
#define VGA_DAC_ADDR_WR 0x3c8
#define VGA_DAC_DATA 0x3c9
#define VGA_EXT_INPUT_STATUS 0x3da
#define VGA_EXT_INPUT_STATUS_VRETRACE 8

Video video;

Video::Video() {
	// TODO
}

Video::~Video() {
	Exit();
}

void Video::Enter() {
}

void Video::Exit() {

}

void Video::SetMode(uint8_t mode) {
	switch (mode) {
		default:
		case 0x13:
			_fb = 0; // TODO get from SDL
	}
}

uint8_t Video::GetMode() {
	// Fixed
	return 0x13;
}

void Video::SetPaletteEntry(uint8_t index, PaletteEntry entry) {
	SetPaletteEntry(index, &entry);
}

Video::PaletteEntry Video::GetPaletteEntry(uint8_t index) {
	PaletteEntry entry;
	GetPaletteEntry(index, &entry);
	return entry;
}

void Video::SetPaletteEntry(uint8_t index, PaletteEntry *entry) {
	// TODO
}

void Video::GetPaletteEntry(uint8_t index, PaletteEntry *entry) {
	// TODO
}

void *Video::GetFB() {
	return _renderBuffer;
}

void Video::WaitForVerticalSync() {
	// TODO
}

void Video::UpdateRect(const Rect &rect) {
	// Merge rect if it overlaps with an existing rect
	for (auto i = 0; i < _updateRectIndex; i++) {
		auto &r = _updatedRects[i];
		if (r.overlaps(rect)) {
			r += rect;
			return;
		}
	}

	// Add a new rect to the list
	_updatedRects[_updateRectIndex++] = rect;
}

void Video::Flip() {
	for (auto i = 0; i <= MAX_UPDATE_RECT_INDEX; i++) {
		auto &rect = _updatedRects[i];
		for (auto y = rect.y1; y <= rect.y2; y++) {
			auto yOffset = y * SCREEN_WIDTH;

			for (auto x = rect.x1; x <= rect.x2; x++) {
				// TODO
			}
		}
	}

	_updateRectIndex = 0;

	events.poll();
}