/**
 * @file app_main.h
 * @brief AliceRC application header
 */
#pragma once

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"

#ifdef __cplusplus
extern "C" {
#endif

/* GPIO Pin Mapping - ESP32S3 */
/* ADC Channels */
#define ADC_CH1_GPIO     4
#define ADC_CH2_GPIO     5
#define ADC_CH3_GPIO     6
#define ADC_CH4_GPIO     7
#define ADC_CH5_GPIO     15
#define ADC_CH6_GPIO     16
#define ADC_CH7_GPIO     17
#define ADC_CH8_GPIO     9
#define ADC_BAT_GPIO     8

/* NRF24L01 - ESP32S3 */
#define NRF_MOSI_GPIO    1
#define NRF_MISO_GPIO    40
#define NRF_SCLK_GPIO    39
#define NRF_CS_GPIO      38
#define NRF_CE_GPIO      2
#define NRF_IRQ_GPIO     42

/* LLCC68 (E220) - ESP32S3 only */
#define LLCC_CS_GPIO     10
#define LLCC_SCLK_GPIO   11
#define LLCC_MISO_GPIO   12
#define LLCC_MOSI_GPIO   13
#define LLCC_NRST_GPIO   14
#define LLCC_BUSY_GPIO   45
#define LLCC_IRQ_GPIO    45  /* shared with BUSY? Check datasheet */

/* OLED SSD1315 - I2C */
#define OLED_SCL_GPIO    37
#define OLED_SDA_GPIO    36

/* Buttons */
#define BTN_UP_GPIO      35
#define BTN_DOWN_GPIO    48
#define BTN_SEL_GPIO     47
#define BTN_BACK_GPIO    3

/* Other peripherals */
#define USB_DM_GPIO      19
#define USB_DP_GPIO      20
#define AUDIO_PWM_GPIO   26  /* ESP32S3: PWM audio */
#define AUDIO_DAC_GPIO   26  /* ESP32: DAC audio */
#define PWR_EN_GPIO      41
#define STATUS_LED_GPIO  0

/* ESP32 (basic) GPIO mapping */
/* ADC Channels */
#define ESP32_ADC_CH1_GPIO   36
#define ESP32_ADC_CH2_GPIO   39
#define ESP32_ADC_CH3_GPIO   34
#define ESP32_ADC_CH4_GPIO   35
#define ESP32_ADC_CH5_GPIO   32
#define ESP32_ADC_CH6_GPIO   33
#define ESP32_ADC_CH7_GPIO   25
#define ESP32_ADC_CH8_GPIO   13

/* NRF24L01 - ESP32 */
#define ESP32_NRF_MOSI_GPIO  23
#define ESP32_NRF_MISO_GPIO  19
#define ESP32_NRF_SCLK_GPIO  18
#define ESP32_NRF_CS_GPIO    5
#define ESP32_NRF_CE_GPIO    22
#define ESP32_NRF_IRQ_GPIO   21

/* OLED - ESP32 */
#define ESP32_OLED_SCL_GPIO  17
#define ESP32_OLED_SDA_GPIO  16

/* Buttons - ESP32 */
#define ESP32_BTN_UP_GPIO    4
#define ESP32_BTN_DOWN_GPIO  2
#define ESP32_BTN_SEL_GPIO   15

/* Battery */
#define BAT_ADC_CHANNEL      ADC_CHANNEL_0
#define BAT_DIVIDER_RATIO    2.0f    /* Voltage divider ratio */
#define BAT_FULL_MV          4200    /* Full battery mV */
#define BAT_EMPTY_MV         3200    /* Empty battery mV */

/* Task priorities */
#define TASK_PRIO_RF         5
#define TASK_PRIO_UI         4
#define TASK_PRIO_ADC        3
#define TASK_PRIO_AUDIO      2

/* Task stack sizes */
#define TASK_STACK_RF        4096
#define TASK_STACK_UI        4096
#define TASK_STACK_ADC       2048
#define TASK_STACK_AUDIO     2048

/* Function declarations */
void app_init(void);
void app_init_gpio(void);
void app_create_tasks(void);
uint8_t battery_get_percent(uint16_t mv);

/* Data type definitions */
typedef struct adc_data_s {
    uint16_t channels[8];
    uint16_t battery_mv;
} adc_data_t;

typedef struct {
    uint8_t key;    /* KEY_UP, KEY_DOWN, KEY_SEL, KEY_BACK */
    uint8_t action; /* 0=press, 1=release, 2=long_press */
} ui_event_t;

/* Queue handles (defined in app_main.c) */
extern QueueHandle_t adc_data_queue;
extern QueueHandle_t rf_command_queue;
extern QueueHandle_t ui_event_queue;

/* RF task */
void rf_task(void *pvParameters);
/* UI task */
void ui_task(void *pvParameters);
/* ADC task */
void adc_task(void *pvParameters);
/* Audio task */
void audio_task(void *pvParameters);

#ifdef __cplusplus
}
#endif