/**
 * @file fc41d_ble_priv.h
 * @brief FC41D BLE 后端私有上下文（与 tcp_link_ctx_t 在 comm_link 中 union 复用）
 */

#ifndef FC41D_BLE_PRIV_H
#define FC41D_BLE_PRIV_H

#include <stdint.h>
#include "fc41d_ble.h"

#define FC41D_AT_RX_ACC_SIZE    768U
#define FC41D_AT_LINE_MAX       128U
#define FC41D_AT_CMD_MAX        1200U

/** link 解析缓冲（AT 行与 +QBLERECV） */
#define FC41D_LINK_RX_NORMAL    512U
/** 固件升级：单包 1024B Base64 JSON + UART 残包 */
#define FC41D_LINK_RX_UPGRADE   2048U

/** 应用 RX 环（心跳/参数查询等） */
#define FC41D_APP_RX_NORMAL     1024U
/** 固件升级 Data JSON 拼包（1024B 载荷约 1.6KB JSON） */
#define FC41D_APP_RX_UPGRADE    2048U

typedef enum {
    FC41D_BLE_ST_IDLE = 0,
    FC41D_BLE_ST_POWER_ON,
    FC41D_BLE_ST_WAIT_CONNECT,
    FC41D_BLE_ST_CONNECTED,
    FC41D_BLE_ST_ERROR,
} fc41d_ble_state_t;

typedef enum {
    FC41D_BLE_URC_NONE = 0,
    FC41D_BLE_URC_CONNECTED,
    FC41D_BLE_URC_DISCONNECTED,
} fc41d_ble_urc_t;

typedef struct {
    char rx_acc[FC41D_AT_RX_ACC_SIZE];
    uint16_t rx_acc_len;
    fc41d_ble_urc_t pending_urc;
    char at_cmd_buf[FC41D_AT_LINE_MAX];
    char ble_cmd_buf[64];
    char gatt_at_cmd[FC41D_AT_CMD_MAX];
} fc41d_ble_at_t;

typedef struct {
    uint8_t *link_rx_acc;
    uint16_t link_rx_acc_cap;
    uint16_t link_rx_acc_len;
    uint16_t qble_payload_need;
    uint8_t *app_rx;
    uint16_t app_rx_cap;
    uint16_t app_rx_wr;
    uint16_t app_rx_rd;
} fc41d_ble_io_t;

typedef struct {
    fc41d_ble_state_t state;
    uint64_t connect_deadline_ms;
    uint64_t power_on_deadline_ms;
    uint64_t last_stat_poll_ms;
    uint8_t transparent;            /* 1=QBLETRANMODE 已生效，UART 直传 JSON */
    uint8_t gatt_fallback;          /* 1=透传 AT 失败，回退 +QBLERECV/QBLEGATTSNTFY */
} fc41d_ble_sm_t;

typedef struct {
    fc41d_ble_at_t at;
    fc41d_ble_io_t io;
    fc41d_ble_sm_t sm;
} fc41d_ble_ctx_t;

#endif /* FC41D_BLE_PRIV_H */