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/**
 * @file updates.c
 * @brief Updates management.
 */

#include "config.h"


#define BUFFSIZE 1024
static char ota_write_data[BUFFSIZE + 1] = { 0 };

static const char               *TAG = "update";

extern sButton                  Buttons[MAXBUTTONS];
extern int                      Main_Screen;


static void http_cleanup(esp_http_client_handle_t client)
{
    esp_http_client_close(client);
    esp_http_client_cleanup(client);
}



void run_update(void)
{
    char                        temp[64];
    esp_err_t                   err;
    const esp_partition_t       *update_partition = NULL;
    esp_ota_handle_t            update_handle = 0;

    TFT_setFont(DEJAVU18_FONT, NULL);
    _fg = TFT_CYAN;
    const esp_partition_t       *running = esp_ota_get_running_partition();
    snprintf(temp, 63, "Running part.type %d sub %d,\r\nat offset 0x%08x\r\n",
		running->type, running->subtype, running->address);
    TFT_print(temp, 0, 25);

    /*
     * Don't use https because it costs more then 100K memory.
     */
    esp_http_client_config_t update = {
	.url = "http://seaport.mbse.ym/update/brewboard.bin",
    };

    esp_http_client_handle_t client = esp_http_client_init(&update);
    if (client == NULL) {
	ESP_LOGI(TAG, "Failed to init HTTP connection");
	goto updateerr;
    }

    err = esp_http_client_open(client, 0);
    if (err != ESP_OK) {
	ESP_LOGE(TAG, "Failed to open HTTP connection: %s", esp_err_to_name(err));
	esp_http_client_cleanup(client);
	goto updateerr;
    }

    esp_http_client_fetch_headers(client);
    update_partition = esp_ota_get_next_update_partition(NULL);
    if (update_partition == NULL) {
	ESP_LOGE(TAG, "No update partition");
	esp_http_client_cleanup(client);
	goto updateerr;
    }
    ESP_LOGI(TAG, "Update to partition subtype %d at offset 0x%x", update_partition->subtype, update_partition->address);

    err = esp_ota_begin(update_partition, OTA_SIZE_UNKNOWN, &update_handle);
    if (err != ESP_OK) {
	ESP_LOGE(TAG, "esp_ota_begin failed (%s)", esp_err_to_name(err));
	http_cleanup(client);
	goto updateerr;
    }

    TFT_print("Begin download.\r\n", 0, LASTY);
    ESP_LOGI(TAG, "Download update %s", update.url);
    int binary_file_length = 0;
    /*deal with all receive packet*/
    while (1) {
	int data_read = esp_http_client_read(client, ota_write_data, BUFFSIZE);
	if (data_read < 0) {
	    ESP_LOGE(TAG, "Error: data read error");
	    http_cleanup(client);
	    goto updateerr;;
	} else if (data_read > 0) {
	    err = esp_ota_write( update_handle, (const void *)ota_write_data, data_read);
	    if (err != ESP_OK) {
		http_cleanup(client);
		goto updateerr;;
	    }
	    binary_file_length += data_read;
//	    ESP_LOGD(TAG, "Written image length %d", binary_file_length);
	} else if (data_read == 0) {
	    break;
	}
    }

    ESP_LOGI(TAG, "Download complete, binary data length: %d", binary_file_length);
    http_cleanup(client);

    if (esp_ota_end(update_handle) != ESP_OK) {
	ESP_LOGE(TAG, "esp_ota_end failed!");
	goto updateerr;
    }
    snprintf(temp, 63, "Received image %d bytes\r\n", binary_file_length);
    TFT_print(temp, 0, LASTY);

    if (esp_partition_check_identity(esp_ota_get_running_partition(), update_partition) == true) {
	ESP_LOGI(TAG, "Already the latest version");
	TFT_print("Already the latest version.\r\n", LASTX, LASTY);
	goto updateok;
    }

    /*
     * Here we have a different and hopefully newer version, install and boot it.
     */
    err = esp_ota_set_boot_partition(update_partition);
    if (err != ESP_OK) {
	ESP_LOGE(TAG, "esp_ota_set_boot_partition failed (%s)!", esp_err_to_name(err));
	goto updateerr;
    }

    ESP_LOGI(TAG, "Prepare to restart system!");
    TFT_print("Rebooting ...", 0, LASTY);
    vTaskDelay(1000 / portTICK_PERIOD_MS);
    esp_restart();
    return ;

updateerr:
    _fg = TFT_RED;
    TFT_print("Error\r\n", 0, LASTY);

updateok:
    vTaskDelay(3000 / portTICK_PERIOD_MS);
}



/*
 * Files init function, only runs once a new screen is entered.
 */
void Updates_Init(void)
{
    switch (Main_Screen) {
	case MAIN_TOOLS_UPDATES:
			_bg = TFT_BLACK;
			TFT_fillScreen(_bg);
			TopMessage("Update");
			break;

	default:	break;
    }
}



/*
 * Updates management loop, non-blocking.
 */
void Updates_Loop(void)
{
    switch (Main_Screen) {

	case MAIN_TOOLS_UPDATES:
			run_update();
			Main_Screen = MAIN_TOOLS;
			break;

	default:	break;
    }
}