/*
 * SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: CC0-1.0
 *
 * OpenThread Radio Co-Processor (RCP) Example
 *
 * This example code is in the Public Domain (or CC0-1.0 licensed, at your option.)
 *
 * Unless required by applicable law or agreed to in writing, this
 * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
 * CONDITIONS OF ANY KIND, either express or implied.
 */

#include <stdio.h>
#include <unistd.h>

#include "esp_event.h"
#include "nvs_flash.h"
#include "esp_openthread.h"
#include "esp_ot_config.h"
#include "esp_vfs_eventfd.h"
#include "driver/uart.h"
#include "driver/rmt.h"
#include "led_strip.h"
#include "esp_err.h"
#include "driver/rmt_tx.h"

#if CONFIG_EXTERNAL_COEX_ENABLE
#include "esp_coexist.h"
#endif

#if !SOC_IEEE802154_SUPPORTED
#error "RCP is only supported for the SoCs which have IEEE 802.15.4 module"
#endif

#define TAG "ot_esp_rcp"

extern void otAppNcpInit(otInstance *instance);

#if CONFIG_EXTERNAL_COEX_ENABLE
#if SOC_EXTERNAL_COEX_ADVANCE
static void ot_external_coexist_init(void)
{
    esp_external_coex_gpio_set_t gpio_pin = ESP_OPENTHREAD_DEFAULT_EXTERNAL_COEX_CONFIG();
    esp_external_coex_set_work_mode(EXTERNAL_COEX_FOLLOWER_ROLE);
    ESP_ERROR_CHECK(esp_enable_extern_coex_gpio_pin(CONFIG_EXTERNAL_COEX_WIRE_TYPE, gpio_pin));
}
#endif // SOC_EXTERNAL_COEX_ADVANCE
#endif // CONFIG_EXTERNAL_COEX_ENABLE

static void ot_task_worker(void *aContext)
{
    esp_openthread_platform_config_t config = {
        .radio_config = ESP_OPENTHREAD_DEFAULT_RADIO_CONFIG(),
        .host_config = ESP_OPENTHREAD_DEFAULT_HOST_CONFIG(),
        .port_config = ESP_OPENTHREAD_DEFAULT_PORT_CONFIG(),
    };

    // Initialize the OpenThread stack
    ESP_ERROR_CHECK(esp_openthread_init(&config));

#if CONFIG_EXTERNAL_COEX_ENABLE
    ot_external_coexist_init();
#endif // CONFIG_EXTERNAL_COEX_ENABLE

    // Initialize the OpenThread ncp
    otAppNcpInit(esp_openthread_get_instance());

    // Run the main loop
    esp_openthread_launch_mainloop();

    // Clean up
    esp_vfs_eventfd_unregister();
    vTaskDelete(NULL);
}

#define LED_GPIO    18
#define LED_COUNT   1

static led_strip_handle_t led_strip = NULL;

void init_led_strip(void)
{
    led_strip_config_t strip_config = {
        .strip_gpio_num = LED_GPIO,
        .max_leds       = LED_COUNT,
    };

    led_strip_rmt_config_t rmt_cfg = {
        .clk_src        = RMT_CLK_SRC_DEFAULT,
        .resolution_hz  = 10 * 1000 * 1000,  // 10MHz is typical
        .mem_block_symbols = 0,              // 0 to use default
        .flags.with_dma  = false,            // DMA optional
    };

    ESP_ERROR_CHECK(led_strip_new_rmt_device(&strip_config, &rmt_cfg, &led_strip));

    ESP_ERROR_CHECK(led_strip_clear(led_strip));

    ESP_ERROR_CHECK(led_strip_set_pixel(led_strip, 0, 255, 0, 255));
    ESP_ERROR_CHECK(led_strip_refresh(led_strip));
}

void app_main(void)
{
    // Used eventfds:
    // * ot task queue
    // * radio driver
    esp_vfs_eventfd_config_t eventfd_config = {
        .max_fds = 2,
    };

    ESP_ERROR_CHECK(nvs_flash_init());
    ESP_ERROR_CHECK(esp_event_loop_create_default());
    ESP_ERROR_CHECK(esp_vfs_eventfd_register(&eventfd_config));
    xTaskCreate(ot_task_worker, "ot_rcp_main", 3072, xTaskGetCurrentTaskHandle(), 5, NULL);
}