// Copyright 2022 King Kévin <kingkevin@cuvoodoo.info>
//
// 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 <stdint.h>
#include "esp_check.h"
#include "esp_err.h"
#include "esp_log.h"
#include "esp_partition.h"
#include "esp_ota_ops.h"
#include "tusb.h"
#include "tusb_dfu_rt.h"
#include "sdkconfig.h"

static const char *TAG = "tusb_dfu_rt";

esp_err_t tusb_dfu_rf_init(void)
{
    // verify if factory partition exists
    const esp_partition_t *factory = esp_partition_find_first(ESP_PARTITION_TYPE_APP, ESP_PARTITION_SUBTYPE_APP_FACTORY, NULL);
    if (!factory) {
        return ESP_ERR_NOT_FOUND;
    }
    // verify if ota data partition exists
    const esp_partition_t *otadata = esp_partition_find_first(ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_OTA, NULL);
    if (!otadata) {
        return ESP_ERR_NOT_FOUND;
    }
    return ESP_OK;
}

/* TinyUSB callbacks */

// Invoked on DFU_DETACH request to reboot to the bootloader
// WARNING: function linked until public function (e.g. tusb_dfu_rf_init) is called
void tud_dfu_runtime_reboot_to_dfu_cb(void)
{
    ESP_LOGI(TAG, "reboot");
    // switch to dfu factory
    const esp_partition_t *factory = esp_partition_find_first(ESP_PARTITION_TYPE_APP, ESP_PARTITION_SUBTYPE_APP_FACTORY, NULL);
    if (!factory) {
        ESP_LOGE(TAG, "factory partition not found");
        return;
    }
    esp_err_t rc = esp_ota_set_boot_partition(factory);
    if (ESP_OK != rc) {
        ESP_LOGE(TAG, "can't set boot to factory");
        return;
    }
    esp_restart();
}