from esphome import pins
import esphome.codegen as cg
from esphome.components import spi
import esphome.config_validation as cv
from esphome.const import CONF_ID, CONF_REFERENCE_VOLTAGE

MULTI_CONF = True

CONF_DRDY_PIN = "drdy_pin"
CONF_SYNC_RESET_PIN = "sync_reset_pin"
CONF_CLOCK_FREQUENCY = "clock_frequency"
CONF_ADS131M08_ID = "ads131m08_id"
CONF_OVERSAMPLING_RATIO = "oversampling_ratio"
CONF_POWER_MODE = "power_mode"
CONF_GLOBAL_CHOP = "global_chop"
CONF_GLOBAL_CHOP_DELAY = "global_chop_delay"
CONF_DCBLOCK_FILTER = "dcblock_filter"
CONF_CURRENT_DETECT = "current_detect"
CONF_CURRENT_DETECT_ALL = "current_detect_all"
CONF_CURRENT_DETECT_NUMBER = "current_detect_number"
CONF_CURRENT_DETECT_LENGTH = "current_detect_length"
CONF_CURRENT_DETECT_THRESHOLD = "current_detect_threshold"

DEPENDENCIES = ["spi"]

ads131m08_ns = cg.esphome_ns.namespace("ads131m08")
ADS131M08Hub = ads131m08_ns.class_("ADS131M08Hub", cg.Component, spi.SPIDevice)

POWER_MODE = ads131m08_ns.enum("ADC_POWERMODE")
POWER_MODES = {
    0: POWER_MODE.VERY_LOW_POWER,
    1: POWER_MODE.LOW_POWER,
    2: POWER_MODE.HIGH_RESOLUTION, # default
    3: POWER_MODE.HIGH_RESOLUTION2,
    "very_low": POWER_MODE.VERY_LOW_POWER,
    "very_low_power": POWER_MODE.VERY_LOW_POWER,
    "low": POWER_MODE.LOW_POWER,
    "low_power": POWER_MODE.LOW_POWER,
    "high": POWER_MODE.HIGH_RESOLUTION,
    "high_resolution": POWER_MODE.HIGH_RESOLUTION,
    "very low": POWER_MODE.VERY_LOW_POWER,
    "very low power": POWER_MODE.VERY_LOW_POWER,
    "low power": POWER_MODE.LOW_POWER,
    "high resolution": POWER_MODE.HIGH_RESOLUTION,
}

GLOBAL_CHOP_DELAY = ads131m08_ns.enum("ADC_GLOBAL_CHOP_DELAY")
GLOBAL_CHOP_DELAYS = {
  2: GLOBAL_CHOP_DELAY.GC_DEL2,
  4: GLOBAL_CHOP_DELAY.GC_DEL4,
  8: GLOBAL_CHOP_DELAY.GC_DEL8,
  16: GLOBAL_CHOP_DELAY.GC_DEL16, # default
  32: GLOBAL_CHOP_DELAY.GC_DEL32,
  64: GLOBAL_CHOP_DELAY.GC_DEL64,
  128: GLOBAL_CHOP_DELAY.GC_DEL128,
  256: GLOBAL_CHOP_DELAY.GC_DEL256,
  512: GLOBAL_CHOP_DELAY.GC_DEL512,
  1024: GLOBAL_CHOP_DELAY.GC_DEL1024,
  2048: GLOBAL_CHOP_DELAY.GC_DEL2048,
  4096: GLOBAL_CHOP_DELAY.GC_DEL4096,
  8192: GLOBAL_CHOP_DELAY.GC_DEL8192,
  16384: GLOBAL_CHOP_DELAY.GC_DEL16384,
  32768: GLOBAL_CHOP_DELAY.GC_DEL32768,
  65536: GLOBAL_CHOP_DELAY.GC_DEL65536,
}

CURRENT_DETECT_NUMBER = ads131m08_ns.enum("ADC_CURRENT_DETECT_NUMBER")
CURRENT_DETECT_NUMBERS = {
    1: CURRENT_DETECT_NUMBER.CD_NUM1, # default
    2: CURRENT_DETECT_NUMBER.CD_NUM2,
    4: CURRENT_DETECT_NUMBER.CD_NUM4,
    8: CURRENT_DETECT_NUMBER.CD_NUM8,
    16: CURRENT_DETECT_NUMBER.CD_NUM16,
    32: CURRENT_DETECT_NUMBER.CD_NUM32,
    64: CURRENT_DETECT_NUMBER.CD_NUM64,
    128: CURRENT_DETECT_NUMBER.CD_NUM128,
}

CURRENT_DETECT_LENGTH = ads131m08_ns.enum("ADC_CURRENT_DETECT_LENGTH")
CURRENT_DETECT_LENGTHS = {
    128: CURRENT_DETECT_LENGTH.CD_LEN128,  # default
    256: CURRENT_DETECT_LENGTH.CD_LEN256,
    512: CURRENT_DETECT_LENGTH.CD_LEN512,
    768: CURRENT_DETECT_LENGTH.CD_LEN768,
    1280: CURRENT_DETECT_LENGTH.CD_LEN1280,
    1792: CURRENT_DETECT_LENGTH.CD_LEN1792,
    2560: CURRENT_DETECT_LENGTH.CD_LEN2560,
    3584: CURRENT_DETECT_LENGTH.CD_LEN3584,
}

OSR = ads131m08_ns.enum("ADS131M08_OVERSAMPLING_RATIO")
OSRS = {
    128: OSR.OSR_128,
    256: OSR.OSR_256,
    512: OSR.OSR_512,
    1024: OSR.OSR_1024,
    2048: OSR.OSR_2048,
    4096: OSR.OSR_4096,
    8192: OSR.OSR_8192,
    16256: OSR.OSR_16256,
}

CLOCK_FREQUENCIES = {
    2048000: 2048000,
    4096000: 4096000,
    8192000: 8192000,
    "2048kHz": 2048000,
    "4096kHz": 4096000,
    "8192kHz": 8192000,
    "2.048MHz": 2048000,
    "4.096MHz": 4096000,
    "8.192MHz": 8192000,
}

CONFIG_SCHEMA = (
    cv.Schema(
        {
            cv.GenerateID(): cv.declare_id(ADS131M08Hub),
            cv.Required(CONF_DRDY_PIN): pins.internal_gpio_input_pin_schema,
            cv.Optional(CONF_SYNC_RESET_PIN): pins.internal_gpio_input_pin_schema,
            cv.Optional(CONF_CLOCK_FREQUENCY, default="8192kHz"): cv.All(
                cv.frequency, cv.one_of(*CLOCK_FREQUENCIES.keys())
            ),
            cv.Optional(CONF_OVERSAMPLING_RATIO, default=1024): cv.enum(
                OSRS, int=True
            ),
            cv.Optional(CONF_REFERENCE_VOLTAGE, default=1.2): cv.float_range(
                min=1.1, max=1.3
            ),
            cv.Optional(CONF_DCBLOCK_FILTER, default=0): cv.int_range(min=0, max=15),
            cv.Optional(CONF_POWER_MODE, default=2): cv.enum(POWER_MODES, int=False),
            cv.Optional(CONF_GLOBAL_CHOP, default=False):  cv.boolean,
            cv.Optional(CONF_GLOBAL_CHOP_DELAY, default=16): cv.enum(GLOBAL_CHOP_DELAYS, int=True),
            cv.Optional(CONF_CURRENT_DETECT, default=False): cv.boolean,
            cv.Optional(CONF_CURRENT_DETECT_ALL, default=False): cv.boolean,
            cv.Optional(CONF_CURRENT_DETECT_NUMBER, default=1): cv.enum(CURRENT_DETECT_NUMBERS, int=True),
            cv.Optional(CONF_CURRENT_DETECT_LENGTH, default=128): cv.enum(CURRENT_DETECT_LENGTHS, int=True),
            cv.Optional(CONF_CURRENT_DETECT_THRESHOLD, default=0):cv.int_range(min=-8388608, max=8388607),
        }
    )
    .extend(cv.COMPONENT_SCHEMA)
    .extend(spi.spi_device_schema(cs_pin_required=True, default_data_rate="10MHz"))
)


async def to_code(config):
    id = config[CONF_ID]
    var = cg.new_Pvariable(id)
    await cg.register_component(var, config)
    await spi.register_spi_device(var, config)
    cg.add(var.set_id(str(id)))
    drdy = await cg.gpio_pin_expression(config[CONF_DRDY_PIN])
    if CONF_SYNC_RESET_PIN in config:
        sync_reset = await cg.gpio_pin_expression(config[CONF_SYNC_RESET_PIN])
        cg.add(var.set_sync_reset_pin(sync_reset))
    clock_frequency = CLOCK_FREQUENCIES[config[CONF_CLOCK_FREQUENCY]]
    cg.add(var.set_clock_frequency(clock_frequency))
    osr = config[CONF_OVERSAMPLING_RATIO]
    cg.add(var.set_osr(osr))
    reference_voltage = config[CONF_REFERENCE_VOLTAGE]
    cg.add(var.set_reference_voltage(reference_voltage))
    dcblock_filter = config[CONF_DCBLOCK_FILTER]
    cg.add(var.set_dcblock_filter(dcblock_filter))
    power_mode = config[CONF_POWER_MODE]
    cg.add(var.set_power_mode(power_mode))
    global_chop = config[CONF_GLOBAL_CHOP]
    cg.add(var.set_global_chop(global_chop))
    global_chop_delay = config[CONF_GLOBAL_CHOP_DELAY]
    cg.add(var.set_global_chop_delay(global_chop_delay))
    current_detect = config[CONF_CURRENT_DETECT]
    cg.add(var.set_current_detect(current_detect))
    current_detect_all = config[CONF_CURRENT_DETECT_ALL]
    cg.add(var.set_current_detect_all(current_detect_all))
    current_detect_number = config[CONF_CURRENT_DETECT_NUMBER]
    cg.add(var.set_current_detect_number(current_detect_number))
    current_detect_length = config[CONF_CURRENT_DETECT_LENGTH]
    cg.add(var.set_current_detect_length(current_detect_length))
    current_detect_threshold = config[CONF_CURRENT_DETECT_THRESHOLD]
    cg.add(var.set_current_detect_threshold(current_detect_threshold))
    cg.add(var.set_drdy_pin(drdy))