//
// Created by misaki on 2025/9/4.
//

#include "app_ota.h"
#include "esp_log.h"
#include "esp_ota_ops.h"
#include "esp_http_client.h"
#include "esp_https_ota.h"
#include "freertos/task.h"

static const char *TAG = "app_ota";
#define DEFAULT_VERSION "0.0.1"

/* 本地版本号，编译时可由构建系统注入 */
#ifndef APP_FW_VERSION
#define APP_FW_VERSION DEFAULT_VERSION
#endif

static const char s_version[] = APP_FW_VERSION;

const char *app_ota_current_version(void)
{
    return s_version;
}

/* 简单版本号比较：a.b.c 字符串比较即可 */
static bool need_update(const char *server_ver)
{
    if (!server_ver) return false;
    return strcmp(server_ver, s_version) > 0;
}

/* HTTP 事件回调，仅打印进度 */
static esp_err_t http_evt(esp_http_client_event_t *evt)
{
    switch (evt->event_id) {
        case HTTP_EVENT_ON_DATA:
            /* 数据流直接走 OTA，这里不打印 */
            break;
        default:
            break;
    }
    return ESP_OK;
}

static void ota_task(void *pv)
{
    char url[256];
    strncpy(url, (const char *)pv, sizeof(url) - 1);
    url[sizeof(url) - 1] = '\0';

    ESP_LOGI(TAG, "开始 OTA，URL=%s", url);

    esp_http_client_config_t http_cfg = {
        .url = url,
        .event_handler = http_evt,
        .keep_alive_enable = true,
        // 如用 https，把 cert_pem 打开即可
        // .cert_pem = (const char *)server_cert_pem_start,
    };

    esp_https_ota_config_t ota_cfg = {
        .http_config = &http_cfg,
    };

    /* 执行升级 */
    esp_err_t ret = esp_https_ota(&ota_cfg);
    if (ret == ESP_OK) {
        ESP_LOGI(TAG, "OTA 完成，准备重启");
        esp_restart();
    } else {
        ESP_LOGE(TAG, "OTA 失败，err=%s", esp_err_to_name(ret));
    }

    vTaskDelete(NULL);
}

esp_err_t app_ota_start(const char *url)
{
    if (!url) return ESP_ERR_INVALID_ARG;
    /* 内部建 Task，栈 8 KB */
    BaseType_t ok = xTaskCreate(ota_task, "ota_task", 8192, (void *)url, 5, NULL);
    return ok == pdPASS ? ESP_OK : ESP_FAIL;
}