// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at

//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

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

#include "esp_err.h"
#include "esp_event.h"
#include "esp_log.h"
#include "esp_netif.h"
#include "esp_netif_types.h"
#include "esp_openthread.h"
#include "esp_openthread_defaults.h"
#include "esp_openthread_lock.h"
#include "esp_openthread_netif_glue.h"
#include "esp_openthread_types.h"
#include "esp_vfs_eventfd.h"
#include "driver/uart.h"
#include "freertos/FreeRTOS.h"
#include "freertos/portmacro.h"
#include "freertos/task.h"
#include "hal/uart_types.h"
#include "openthread/cli.h"
#include "openthread/instance.h"
#include "openthread/tasklet.h"

#if CONFIG_OPENTHREAD_CUSTOM_COMMAND
#include "esp_ot_cli_extension.h"
#endif // CONFIG_OPENTHREAD_CUSTOM_COMMAND

#define TAG "ot_esp_cli"

extern void otAppCliInit(otInstance *instance);

static esp_netif_t *init_openthread_netif(void)
{
    esp_netif_config_t cfg = ESP_NETIF_DEFAULT_OPENTHREAD();
    esp_netif_t *netif = esp_netif_new(&cfg);
    assert(netif != NULL);
    ESP_ERROR_CHECK(esp_netif_attach(netif, esp_openthread_netif_glue_init()));

    return netif;
}

static void ot_task_worker(void *aContext)
{
    esp_openthread_platform_config_t config = {
        .radio_config = ESP_OPENTHREAD_DEFAULT_RADIO_UART_RCP_CONFIG(4, 5),
        .host_config = ESP_OPENTHREAD_DEFAULT_UART_HOST_CONFIG(),
    };
    esp_netif_t *openthread_netif;

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

    // Initialize the OpenThread cli
    otAppCliInit(esp_openthread_get_instance());

    // Initialize the esp_netif bindings
    openthread_netif = init_openthread_netif();

#if CONFIG_OPENTHREAD_CUSTOM_COMMAND
    esp_cli_custom_command_init();
#endif // CONFIG_OPENTHREAD_CUSTOM_COMMAND

    // Run the main loop
    esp_openthread_launch_mainloop();

    // Clean up
    esp_netif_destroy(openthread_netif);
    esp_openthread_netif_glue_deinit();
    esp_vfs_eventfd_unregister();
    vTaskDelete(NULL);
}

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

    ESP_ERROR_CHECK(esp_event_loop_create_default());
    ESP_ERROR_CHECK(esp_netif_init());
    ESP_ERROR_CHECK(esp_vfs_eventfd_register(&eventfd_config));
    xTaskCreate(ot_task_worker, "ot_cli_main", 10240, xTaskGetCurrentTaskHandle(), 5, NULL);
}