/*
 * ESPRESSIF MIT License
 *
 * Copyright (c) 2018 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
 *
 * Permission is hereby granted for use on all ESPRESSIF SYSTEMS products, in
 * which case, it is free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the
 * Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 */

#include "periph_adc_button.h"
#include "audio_error.h"
#include "audio_mem.h"
#include "esp_log.h"
#include <string.h>

static const char *TAG = "PERIPH_ADC_BUTTON";

typedef struct
{
  int adc_channels;
  adc_btn_list *list;
  adc_btn_task_cfg_t task_cfg;
} periph_adc_btn_t;

static void
btn_cb (void *user_data, int adc, int id, adc_btn_state_t state)
{
  esp_periph_handle_t self = (esp_periph_handle_t)user_data;
  periph_adc_button_event_id_t event_id = PERIPH_ADC_BUTTON_IDLE;
  if (state == ADC_BTN_STATE_PRESSED)
    {
      event_id = PERIPH_ADC_BUTTON_PRESSED;
    }
  else if (state == ADC_BTN_STATE_LONG_PRESSED)
    {
      event_id = PERIPH_ADC_BUTTON_LONG_PRESSED;
    }
  else if (state == ADC_BTN_STATE_RELEASE)
    {
      event_id = PERIPH_ADC_BUTTON_RELEASE;
    }
  else if (state == ADC_BTN_STATE_LONG_RELEASE)
    {
      event_id = PERIPH_ADC_BUTTON_LONG_RELEASE;
    }
  // Send ID as data and ADC as data_len
  esp_periph_send_event (self, event_id, (void *)id, adc);
}

static esp_err_t
_adc_button_destroy (esp_periph_handle_t self)
{
  periph_adc_btn_t *periph_adc_btn = esp_periph_get_data (self);
  adc_btn_delete_task ();
  adc_btn_destroy_list (periph_adc_btn->list);
  audio_free (periph_adc_btn);
  return ESP_OK;
}

static esp_err_t
_adc_button_init (esp_periph_handle_t self)
{
  periph_adc_btn_t *periph_adc_btn = esp_periph_get_data (self);
  adc_btn_init ((void *)self, btn_cb, periph_adc_btn->list,
                &periph_adc_btn->task_cfg);
  return ESP_OK;
}

esp_periph_handle_t
periph_adc_button_init (periph_adc_button_cfg_t *config)
{
  esp_periph_handle_t periph
      = esp_periph_create (PERIPH_ID_ADC_BTN, "periph_adc_btn");
  AUDIO_MEM_CHECK (TAG, periph, return NULL);

  periph_adc_btn_t *periph_adc_btn
      = audio_calloc (1, sizeof (periph_adc_btn_t));
  AUDIO_MEM_CHECK (TAG, periph_adc_btn, {
    audio_free (periph);
    return NULL;
  });
  periph_adc_btn->adc_channels = config->arr_size;
  periph_adc_btn->list = adc_btn_create_list (config->arr, config->arr_size);
  memcpy (&periph_adc_btn->task_cfg, &config->task_cfg,
          sizeof (adc_btn_task_cfg_t));
  AUDIO_MEM_CHECK (TAG, periph_adc_btn->list, {
    audio_free (periph);
    audio_free (periph_adc_btn);
    return NULL;
  });

  esp_periph_set_data (periph, periph_adc_btn);
  esp_periph_set_function (periph, _adc_button_init, NULL,
                           _adc_button_destroy);
  return periph;
}