/* main.c - Main entry point and event loop for sbc-harness
 *
 * Copyright (C) 2024  Luke T. Shumaker <lukeshu@lukeshu.com>
 * SPDX-Licence-Identifier: AGPL-3.0-or-later
 */

/* pico-sdk */
#include <stdio.h>
#include "pico/stdlib.h"

/* TinyUSB */
#include "bsp/board_api.h"
#include "tusb.h"

/* local */
#include "coroutine.h"
#include "usb_keyboard.h"

typedef struct {
	usb_keyboard_chan_t *chan;
	size_t               i;
} hello_world_stack_t;

void hello_world_cr(void *_stack) {
	const char *msg = "Hello world!\n";
	hello_world_stack_t *stack = _stack;

	cr_begin();
	for (;;) {
		cr_chan_req(stack->chan, NULL, msg[stack->i]);
		stack->i = (stack->i + 1) % strlen(msg);
	}
	cr_end();
}

int main() {
	/* pico-sdk initialization */
	stdio_uart_init();
	gpio_init(PICO_DEFAULT_LED_PIN);
	gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);

	usb_keyboard_init();

	/* TinyUSB initialization */
	board_init();
	tud_init(BOARD_TUD_RHPORT);
	if (board_init_after_tusb)
		board_init_after_tusb();

	/* coroutine initialization */
	coroutine_init();

	usb_keyboard_chan_t keyboard_chan;

	usb_keyboard_init();
	usb_keyboard_stack_t usb_keyboard_stack = {0};
	usb_keyboard_stack.chan = &keyboard_chan;
	coroutine_add(usb_keyboard_cr, &usb_keyboard_stack);

	hello_world_stack_t hello_world_stack = {0};
	hello_world_stack.chan = &keyboard_chan;
	coroutine_add(hello_world_cr, &hello_world_stack);

	/* Event loop. */
	for (;;) {
		tud_task();
		coroutine_task();
	}
}