/*
 * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Unlicense OR CC0-1.0
 */
/* Console example — various system commands

   This example code is in the Public Domain (or CC0 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 <string.h>
#include <ctype.h>
#include <inttypes.h>
#include "esp_log.h"
#include "esp_console.h"
#include "esp_chip_info.h"
#include "esp_flash.h"
#include "argtable3/argtable3.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "cmd_system.h"
#include "sdkconfig.h"

#ifdef CONFIG_FREERTOS_USE_STATS_FORMATTING_FUNCTIONS
#define WITH_TASKS_INFO 1
#endif

static const char *TAG = "cmd_system_common";

static void register_free(void);
static void register_heap(void);
static void register_version(void);
static void register_restart(void);
#if WITH_TASKS_INFO
static void register_tasks(void);
#endif
static void register_log_level(void);

void register_system_common(void)
{
    register_free();
    register_heap();
    register_version();
    register_restart();
#if WITH_TASKS_INFO
    register_tasks();
#endif
    register_log_level();
}


/* 'version' command */
static int get_version(int argc, char **argv)
{
    const char *model;
    esp_chip_info_t info;
    uint32_t flash_size;
    esp_chip_info(&info);

    switch(info.model) {
        case CHIP_ESP32:
            model = "ESP32";
            break;
        case CHIP_ESP32S2:
            model = "ESP32-S2";
            break;
        case CHIP_ESP32S3:
            model = "ESP32-S3";
            break;
        case CHIP_ESP32C3:
            model = "ESP32-C3";
            break;
        case CHIP_ESP32H2:
            model = "ESP32-H2";
            break;
        case CHIP_ESP32C2:
            model = "ESP32-C2";
            break;
        default:
            model = "Unknown";
            break;
    }

    if(esp_flash_get_size(NULL, &flash_size) != ESP_OK) {
        printf("Get flash size failed");
        return 1;
    }
    printf("IDF Version:%s\r\n", esp_get_idf_version());
    printf("Chip info:\r\n");
    printf("\tmodel:%s\r\n", model);
    printf("\tcores:%d\r\n", info.cores);
    printf("\tfeature:%s%s%s%s%"PRIu32"%s\r\n",
           info.features & CHIP_FEATURE_WIFI_BGN ? "/802.11bgn" : "",
           info.features & CHIP_FEATURE_BLE ? "/BLE" : "",
           info.features & CHIP_FEATURE_BT ? "/BT" : "",
           info.features & CHIP_FEATURE_EMB_FLASH ? "/Embedded-Flash:" : "/External-Flash:",
           flash_size / (1024 * 1024), " MB");
    printf("\trevision number:%d\r\n", info.revision);
    return 0;
}

static void register_version(void)
{
    const esp_console_cmd_t cmd = {
        .command = "version",
        .help = "Get version of chip and SDK",
        .hint = NULL,
        .func = &get_version,
    };
    ESP_ERROR_CHECK( esp_console_cmd_register(&cmd) );
}

/** 'restart' command restarts the program */

static int restart(int argc, char **argv)
{
    ESP_LOGI(TAG, "Restarting");
    esp_restart();
}

static void register_restart(void)
{
    const esp_console_cmd_t cmd = {
        .command = "restart",
        .help = "Software reset of the chip",
        .hint = NULL,
        .func = &restart,
    };
    ESP_ERROR_CHECK( esp_console_cmd_register(&cmd) );
}

/** 'free' command prints available heap memory */

static int free_mem(int argc, char **argv)
{
    printf("%"PRIu32"\n", esp_get_free_heap_size());
    return 0;
}

static void register_free(void)
{
    const esp_console_cmd_t cmd = {
        .command = "free",
        .help = "Get the current size of free heap memory",
        .hint = NULL,
        .func = &free_mem,
    };
    ESP_ERROR_CHECK( esp_console_cmd_register(&cmd) );
}

/* 'heap' command prints minumum heap size */
static int heap_size(int argc, char **argv)
{
    uint32_t heap_size = heap_caps_get_minimum_free_size(MALLOC_CAP_DEFAULT);
    printf("min heap size: %"PRIu32"\n", heap_size);
    return 0;
}

static void register_heap(void)
{
    const esp_console_cmd_t heap_cmd = {
        .command = "heap",
        .help = "Get minimum size of free heap memory that was available during program execution",
        .hint = NULL,
        .func = &heap_size,
    };
    ESP_ERROR_CHECK( esp_console_cmd_register(&heap_cmd) );

}

/** 'tasks' command prints the list of tasks and related information */
#if WITH_TASKS_INFO

static int tasks_info(int argc, char **argv)
{
    const size_t bytes_per_task = 40; /* see vTaskList description */
    char *task_list_buffer = malloc(uxTaskGetNumberOfTasks() * bytes_per_task);
    if (task_list_buffer == NULL) {
        ESP_LOGE(TAG, "failed to allocate buffer for vTaskList output");
        return 1;
    }
    fputs("Task Name\tStatus\tPrio\tHWM\tTask#", stdout);
#ifdef CONFIG_FREERTOS_VTASKLIST_INCLUDE_COREID
    fputs("\tAffinity", stdout);
#endif
    fputs("\n", stdout);
    vTaskList(task_list_buffer);
    fputs(task_list_buffer, stdout);
    free(task_list_buffer);
    return 0;
}

static void register_tasks(void)
{
    const esp_console_cmd_t cmd = {
        .command = "tasks",
        .help = "Get information about running tasks",
        .hint = NULL,
        .func = &tasks_info,
    };
    ESP_ERROR_CHECK( esp_console_cmd_register(&cmd) );
}

#endif // WITH_TASKS_INFO

/** log_level command changes log level via esp_log_level_set */

static struct {
    struct arg_str *tag;
    struct arg_str *level;
    struct arg_end *end;
} log_level_args;

static const char* s_log_level_names[] = {
    "none",
    "error",
    "warn",
    "info",
    "debug",
    "verbose"
};

static int log_level(int argc, char **argv)
{
    int nerrors = arg_parse(argc, argv, (void **) &log_level_args);
    if (nerrors != 0) {
        arg_print_errors(stderr, log_level_args.end, argv[0]);
        return 1;
    }
    assert(log_level_args.tag->count == 1);
    assert(log_level_args.level->count == 1);
    const char* tag = log_level_args.tag->sval[0];
    const char* level_str = log_level_args.level->sval[0];
    esp_log_level_t level;
    size_t level_len = strlen(level_str);
    for (level = ESP_LOG_NONE; level <= ESP_LOG_VERBOSE; level++) {
        if (memcmp(level_str, s_log_level_names[level], level_len) == 0) {
            break;
        }
    }
    if (level > ESP_LOG_VERBOSE) {
        printf("Invalid log level '%s', choose from none|error|warn|info|debug|verbose\n", level_str);
        return 1;
    }
    if (level > CONFIG_LOG_MAXIMUM_LEVEL) {
        printf("Can't set log level to %s, max level limited in menuconfig to %s. "
               "Please increase CONFIG_LOG_MAXIMUM_LEVEL in menuconfig.\n",
               s_log_level_names[level], s_log_level_names[CONFIG_LOG_MAXIMUM_LEVEL]);
        return 1;
    }
    esp_log_level_set(tag, level);
    return 0;
}

static void register_log_level(void)
{
    log_level_args.tag = arg_str1(NULL, NULL, "<tag|*>", "Log tag to set the level for, or * to set for all tags");
    log_level_args.level = arg_str1(NULL, NULL, "<none|error|warn|debug|verbose>", "Log level to set. Abbreviated words are accepted.");
    log_level_args.end = arg_end(2);

    const esp_console_cmd_t cmd = {
        .command = "log_level",
        .help = "Set log level for all tags or a specific tag.",
        .hint = NULL,
        .func = &log_level,
        .argtable = &log_level_args
    };
    ESP_ERROR_CHECK( esp_console_cmd_register(&cmd) );
}
