"""Shared constants for protocol, validation, transport, and GUI defaults."""

# ---- Transport / timing

BAUDRATE = 115200
SERIAL_TIMEOUT_SEC = 1.0
WAIT_AFTER_SEND_SEC = 0.15

GUI_POLL_INTERVAL_MS = 150
GUI_STATUS_INTERVAL_MS = 1000

# ---- Packet sizes

GET_DATA_TOTAL_LENGTH = 30
SEND_PARAMS_TOTAL_LENGTH = 30
SHORT_CONTROL_TOTAL_LENGTH = 10
WAVE_DATA_TOTAL_LENGTH = 30
PROFILE_SAVE_CONTROL_TOTAL_LENGTH = 30
PROFILE_SAVE_DATA_TOTAL_LENGTH = 30
SHORT_COMMAND_LENGTH = 2
STATUS_RESPONSE_LENGTH = 2

# ---- Supported firmware commands

CMD_DECODE_ENABLE = 0x1111
CMD_DEFAULT_ENABLE = 0x2222
CMD_TRANS_ENABLE = 0x4444
CMD_STATE = 0x6666
CMD_PROFILE_SAVE_CONTROL = 0x7777
CMD_AD9102_CONTROL = 0x8888
CMD_AD9833_CONTROL = 0x9999
CMD_DS1809_CONTROL = 0xAAAA
CMD_STM32_DAC_CONTROL = 0xBBBB
CMD_AD9102_WAVE_CONTROL = 0xCCCC
CMD_AD9102_WAVE_DATA = 0xDDDD
CMD_PROFILE_SAVE_DATA = 0xEEEE

# ---- Setup-word bit layout from firmware app_decode_work_packet()

SETUP_WORK_ENABLED = 1 << 0
SETUP_SUPPLY_5V1_ENABLED = 1 << 1
SETUP_SUPPLY_5V2_ENABLED = 1 << 2
SETUP_LASER1_ENABLED = 1 << 3
SETUP_LASER2_ENABLED = 1 << 4
SETUP_REFERENCE1_ENABLED = 1 << 5
SETUP_REFERENCE2_ENABLED = 1 << 6
SETUP_TEC1_ENABLED = 1 << 7
SETUP_TEC2_ENABLED = 1 << 8
SETUP_TEMP_SENSOR1_ENABLED = 1 << 9
SETUP_TEMP_SENSOR2_ENABLED = 1 << 10
SETUP_PID1_FROM_HOST = 1 << 12
SETUP_PID2_FROM_HOST = 1 << 13

DEFAULT_SETUP_WORD = (
    SETUP_WORK_ENABLED
    | SETUP_SUPPLY_5V1_ENABLED
    | SETUP_SUPPLY_5V2_ENABLED
    | SETUP_LASER1_ENABLED
    | SETUP_LASER2_ENABLED
    | SETUP_REFERENCE1_ENABLED
    | SETUP_REFERENCE2_ENABLED
    | SETUP_TEC1_ENABLED
    | SETUP_TEC2_ENABLED
    | SETUP_TEMP_SENSOR1_ENABLED
    | SETUP_TEMP_SENSOR2_ENABLED
    | SETUP_PID1_FROM_HOST
    | SETUP_PID2_FROM_HOST
)

# ---- Status-byte flags from firmware app_types.h

STATUS_FLAG_SD_ERROR = 0x01
STATUS_FLAG_UART_ERROR = 0x02
STATUS_FLAG_UART_DECODE_ERROR = 0x04
STATUS_FLAG_TEC1_ERROR = 0x08
STATUS_FLAG_TEC2_ERROR = 0x10
STATUS_FLAG_DEFAULT_ERROR = 0x20
STATUS_FLAG_AD9102_ERROR = 0x80

STATUS_DESCRIPTIONS = {
    STATUS_FLAG_SD_ERROR: "SD card read/write error.",
    STATUS_FLAG_UART_ERROR: "UART framing or header error.",
    STATUS_FLAG_UART_DECODE_ERROR: "Command payload validation error.",
    STATUS_FLAG_TEC1_ERROR: "Laser 1 TEC driver overheat.",
    STATUS_FLAG_TEC2_ERROR: "Laser 2 TEC driver overheat.",
    STATUS_FLAG_DEFAULT_ERROR: "Device reset/default handling error.",
    STATUS_FLAG_AD9102_ERROR: "AD9102 configuration or waveform error.",
}

# ---- Peripheral control flags from firmware app_types.h

AD9102_FLAG_ENABLE = 0x0001
AD9102_FLAG_TRIANGLE = 0x0002
AD9102_FLAG_SRAM = 0x0004
AD9102_FLAG_SRAM_FORMAT_ALT = 0x0008

AD9833_FLAG_ENABLE = 0x0001
AD9833_FLAG_TRIANGLE = 0x0002

DS1809_FLAG_INCREMENT = 0x0001
DS1809_FLAG_DECREMENT = 0x0002

STM32_DAC_FLAG_ENABLE = 0x0001

AD9102_WAVE_OPCODE_BEGIN = 0x0001
AD9102_WAVE_OPCODE_COMMIT = 0x0002
AD9102_WAVE_OPCODE_CANCEL = 0x0003

PROFILE_SAVE_OPCODE_BEGIN = 0x0001
PROFILE_SAVE_OPCODE_COMMIT = 0x0002
PROFILE_SAVE_OPCODE_CANCEL = 0x0003

PROFILE_SAVE_SECTION_PROFILE_TEXT = 0x0001
PROFILE_SAVE_SECTION_WAVEFORM_TEXT = 0x0002

# ---- Physical constants from the existing conversion formulas

VREF = 2.5

R1 = 10000
R2 = 2200
R3 = 27000
R4 = 30000
R5 = 27000
R6 = 56000

RREF = 30

R7 = 22000
R8 = 22000
R9 = 5100
R10 = 180000

BETA_INTERNAL = 3900
BETA_EXTERNAL = 3455
T0_K = 298
R0 = 10000

ADC_BITS_16 = 65535
ADC_BITS_12 = 4095

U3V3_COEFF = 1.221e-3
U5V_COEFF = 1.8315e-3
U7V_COEFF = 6.72e-3

# ---- Validation limits

TEMP_MIN_C = 15.0
TEMP_MAX_C = 40.0

CURRENT_MIN_MA = 15.0
CURRENT_MAX_MA = 60.0

AD9102_SAW_STEP_MIN = 1
AD9102_SAW_STEP_MAX = 63
AD9102_PAT_BASE_MIN = 0
AD9102_PAT_BASE_MAX = 15
AD9102_PAT_PERIOD_MIN = 0
AD9102_PAT_PERIOD_MAX = 65535
AD9102_SRAM_SAMPLE_MIN = 2
AD9102_SRAM_SAMPLE_MAX = 4096
AD9102_SRAM_HOLD_MIN = 0
AD9102_SRAM_HOLD_MAX = 15
AD9102_SRAM_AMPLITUDE_MIN = 0
AD9102_SRAM_AMPLITUDE_MAX = 8191
AD9102_WAVE_SAMPLE_MIN = -8192
AD9102_WAVE_SAMPLE_MAX = 8191
AD9102_WAVE_MAX_CHUNK_SAMPLES = 12
AD9102_CLOCK_HZ = 150_000_000

AD9833_FREQ_WORD_MIN = 0
AD9833_FREQ_WORD_MAX = 0x0FFFFFFF
AD9833_MCLK_HZ = 20_000_000
AD9833_OUTPUT_FREQ_MIN_HZ = 0
AD9833_OUTPUT_FREQ_MAX_HZ = AD9833_MCLK_HZ // 2

DS1809_COUNT_MIN = 1
DS1809_COUNT_MAX = 64
DS1809_PULSE_MS_MIN = 1
DS1809_PULSE_MS_MAX = 500
DS1809_PROFILE_POSITION_MIN = 0
DS1809_PROFILE_POSITION_MAX = 63

STM32_DAC_CODE_MIN = 0
STM32_DAC_CODE_MAX = 4095

# ---- Rail tolerances

VOLT_3V3_MIN = 3.1
VOLT_3V3_MAX = 3.5
VOLT_5V_MIN = 4.8
VOLT_5V_MAX = 5.3
VOLT_7V_MIN = 6.5
VOLT_7V_MAX = 7.5

# ---- UI / runtime defaults

DEFAULT_TEMP1_C = 28.0
DEFAULT_TEMP2_C = 29.2
DEFAULT_CURRENT1_MA = 33.0
DEFAULT_CURRENT2_MA = 60.0

DEFAULT_AD9102_SAW_STEP = 1
DEFAULT_AD9102_PAT_BASE = 2
DEFAULT_AD9102_PAT_PERIOD = 0xFFFF
DEFAULT_AD9102_SAMPLE_COUNT = 16
DEFAULT_AD9102_HOLD_CYCLES = 1
DEFAULT_AD9102_AMPLITUDE = 8191
DEFAULT_AD9102_SAW_FREQUENCY_HZ = 4577
DEFAULT_AD9102_SRAM_FREQUENCY_HZ = 9_375_000
DEFAULT_AD9833_FREQ_WORD = 0
DEFAULT_AD9833_FREQUENCY_HZ = 1_000_000
DEFAULT_DS1809_COUNT = 1
DEFAULT_DS1809_PULSE_MS = 2
DEFAULT_DS1809_PROFILE_POSITION = 39
DEFAULT_STM32_DAC_VOLT = 0.52
DEFAULT_STM32_DAC_VREF = 2.5
DEFAULT_STM32_DAC_CODE = round(
    DEFAULT_STM32_DAC_VOLT / DEFAULT_STM32_DAC_VREF * STM32_DAC_CODE_MAX
)

DEFAULT_PI_P = 2560
DEFAULT_PI_I = 128

PROFILE_NAME_MAX_LENGTH = 16
PROFILE_NAME_ALLOWED_PATTERN = r"[A-Za-z0-9 _-]{1,16}"
PROFILE_SAVE_DATA_CHUNK_BYTES = 22

PLOT_POINTS = 100