#include <gint/keyboard.h>
#include <gint/display.h>

#include "input.h"

void input_step(Input *input) {
	/* read all inputs */
	clearevents();
	/* for each key, update it's state */
	for (int i = 0; i < KEYS_COUNT; ++i) {
		uint8_t *state = &input->states[i];
		uint8_t key = input->keys[i];
		/* get if the key is pressed */
		bool pressed = keydown(key);
		/* update input status */
		if (pressed) {
			*state = (*state == S_RELEASED || *state == S_UP) ? S_PRESSED : S_DOWN;
		}
		else {
			*state =  (*state == S_PRESSED || *state == S_DOWN) ? S_RELEASED : S_UP;
		}
	}
}

void input_init(Input *input) {
	input->keys[K_LEFT] = KEY_LEFT;
	input->keys[K_RIGHT] = KEY_RIGHT;
	input->keys[K_UP] = KEY_UP;
	input->keys[K_DOWN] = KEY_DOWN;
	input->keys[K_EXIT] = KEY_EXIT;
	for (int i = 0; i < KEYS_COUNT; ++i) {
		input->states[i] = S_UP;
	}
}

void input_draw_debug(Input *input) {
	for (int i = 0; i < KEYS_COUNT; ++i) {
		dprint(0, i * 10, C_BLACK, "%d", i);
		dprint(16, i * 10, C_BLACK, "%d", input->states[i]);
		dprint(32, i * 10, C_BLACK, "D%d", input_is_down(input, i));
		dprint(48, i * 10, C_BLACK, "P%d", input_is_pressed(input, i));
		dprint(64, i * 10, C_BLACK, "U%d", input_is_up(input, i));
		dprint(80, i * 10, C_BLACK, "R%d", input_is_released(input, i));
		dprint(96, i * 10, C_BLACK, "V%d", (int)input_is_down(input, i));
	}
}

bool input_is_pressed(Input *input, uint8_t key) {
	return input->states[key] == S_PRESSED;
}

bool input_is_down(Input *input, uint8_t key) {
	return (input->states[key] == S_DOWN) || (input->states[key] == S_PRESSED);
}

bool input_is_released(Input *input, uint8_t key) {
	return input->states[key] == S_RELEASED;
}

bool input_is_up(Input *input, uint8_t key) {
	return (input->states[key] == S_UP) || (input->states[key] == S_RELEASED);
}