"""Constants for the Xiaoxiang Smart BMS integration."""

DOMAIN = "xiaoxiang_bms"

CONF_ADDRESS = "address"
CONF_POLL_INTERVAL = "poll_interval"

DEFAULT_POLL_INTERVAL = 5   # seconds — fast for solar/energy monitoring
MIN_POLL_INTERVAL = 2
MAX_POLL_INTERVAL = 60

# GATT UUIDs (Xiaoxiang BMS UART-over-GATT)
UART_SERVICE_UUID = "0000ff00-0000-1000-8000-00805f9b34fb"
RX_CHAR_UUID      = "0000ff01-0000-1000-8000-00805f9b34fb"  # BMS → HA (notify)
TX_CHAR_UUID      = "0000ff02-0000-1000-8000-00805f9b34fb"  # HA → BMS (write)

# Request frames: [0xDD, 0xA5, CMD, 0x00, CHK_HI, CHK_LO, 0x77]
CMD_GENERAL = bytes([0xDD, 0xA5, 0x03, 0x00, 0xFF, 0xFD, 0x77])  # pack info
CMD_CELL    = bytes([0xDD, 0xA5, 0x04, 0x00, 0xFF, 0xFC, 0x77])  # cell voltages

# Frame markers
FRAME_START = 0xDD
FRAME_END   = 0x77

# Response command IDs (byte 1 of frame)
CMD_ID_GENERAL = 0x03
CMD_ID_CELL    = 0x04