/* SPDX-License-Identifier: MIT
 * Copyright (c) 2021 KikooDX
 * This file is part of
 * [Painfull Success CG](https://git.sr.ht/~kikoodx/painfull-success-cg),
 * which is MIT licensed. The MIT license requires this copyright notice to be
 * included in all copies and substantial portions of the software. */
#include "conf.h"
#include "input.h"
#include "lazyint.h"
#include "level.h"
#include "player.h"
#include <gint/clock.h>
#include <gint/display.h>
#include <gint/timer.h>
#include <stdbool.h>

int
callback(volatile int *arg)
{
	*arg = true;
	return 0;
}

int
main(void)
{
	/* Initialize player. */
	Player player;
	player_init(&player);
	/* Initialize level. */
	Level level = (Level){};
	u8 level_id = 0;
	level_load(&level, &player, level_id);
	/* Initialize input. */
	Input input = (Input){};
	input_init(&input);
	/* Initalize y offset. */
	i16 y_offset = DRAW_OFFSET_Y_DEFAULT;

	/* UPS control. */
	volatile int has_ticked = true;
	int timer = timer_configure(TIMER_ANY, 1000000 / TARGET_UPS,
	                            GINT_CALL(callback, &has_ticked));
	timer_start(timer);

	/* Core loop. */
	while (!input_is_down(input, K_EXIT)) {
		/* Repeat step event so the UPS is constant. */
		for (u8 i = 0; i < TARGET_UPS / TARGET_FPS; i += 1) {
			/* UPS control. */
			while (!has_ticked)
				sleep();
			has_ticked = false;
			/* Update. */
			input_update(&input);
			player_update(&player, &level, input, &level_id);
			/* Y offset. */
			if (input_is_pressed(input, K_CAM_UP) &&
			    y_offset < DRAW_OFFSET_Y_MAX)
				y_offset += DRAW_OFFSET_Y_STEP;
			if (input_is_pressed(input, K_CAM_DOWN) &&
			    y_offset > DRAW_OFFSET_Y_MIN)
				y_offset -= DRAW_OFFSET_Y_STEP;
		}
		/* Draw. */
		dclear(C_BLACK);
		level_draw(level, y_offset);
		player_draw(player, y_offset);
		/* Black borders. */
		drect(0, 0, DRAW_OFFSET_X - 1, DHEIGHT, C_BLACK);
		drect(DRAW_OFFSET_X + LEVEL_WIDTH_PX, 0, DWIDTH, DHEIGHT,
		      C_BLACK);
		dupdate();
	}

	return 1;
}