import esphome.codegen as cg
import esphome.config_validation as cv
from esphome.components import i2c, sensor

from esphome.const import (
    CONF_ID,
    CONF_CO2,
    CONF_HUMIDITY,
    CONF_TEMPERATURE,
    DEVICE_CLASS_CARBON_DIOXIDE,
    DEVICE_CLASS_HUMIDITY,
    DEVICE_CLASS_TEMPERATURE,
    STATE_CLASS_MEASUREMENT,
    UNIT_PARTS_PER_MILLION,
    ICON_MOLECULE_CO2,
    ICON_THERMOMETER,
    ICON_WATER_PERCENT,
    UNIT_CELSIUS,
    UNIT_PERCENT,
)

CODEOWNERS = ["@sjtrny"]
DEPENDENCIES = ["i2c"]

scd4x_ns = cg.esphome_ns.namespace("scd4x")
SCD4XComponent = scd4x_ns.class_("SCD4XComponent", cg.PollingComponent, i2c.I2CDevice)

CONF_AUTOMATIC_SELF_CALIBRATION = "automatic_self_calibration"
CONF_ALTITUDE_COMPENSATION = "altitude_compensation"
CONF_AMBIENT_PRESSURE_COMPENSATION = "ambient_pressure_compensation"
CONF_TEMPERATURE_OFFSET = "temperature_offset"
CONF_AMBIENT_PRESSURE_COMPENSATION_SOURCE = "ambient_pressure_compensation_source"

CONFIG_SCHEMA = (
    cv.Schema(
        {
            cv.GenerateID(): cv.declare_id(SCD4XComponent),
            cv.Optional(CONF_CO2): sensor.sensor_schema(
                unit_of_measurement=UNIT_PARTS_PER_MILLION,
                icon=ICON_MOLECULE_CO2,
                accuracy_decimals=0,
                device_class=DEVICE_CLASS_CARBON_DIOXIDE,
                state_class=STATE_CLASS_MEASUREMENT,
            ),
            cv.Optional(CONF_TEMPERATURE): sensor.sensor_schema(
                unit_of_measurement=UNIT_CELSIUS,
                icon=ICON_THERMOMETER,
                accuracy_decimals=2,
                device_class=DEVICE_CLASS_TEMPERATURE,
                state_class=STATE_CLASS_MEASUREMENT,
            ),
            cv.Optional(CONF_HUMIDITY): sensor.sensor_schema(
                unit_of_measurement=UNIT_PERCENT,
                icon=ICON_WATER_PERCENT,
                accuracy_decimals=2,
                device_class=DEVICE_CLASS_HUMIDITY,
                state_class=STATE_CLASS_MEASUREMENT,
            ),
            cv.Optional(CONF_AUTOMATIC_SELF_CALIBRATION, default=True): cv.boolean,
            cv.Optional(CONF_ALTITUDE_COMPENSATION, default="0m"): cv.All(
                cv.float_with_unit("altitude", "(m|m a.s.l.|MAMSL|MASL)"),
                cv.int_range(min=0, max=0xFFFF, max_included=False),
            ),
            cv.Optional(CONF_AMBIENT_PRESSURE_COMPENSATION): cv.pressure,
            cv.Optional(CONF_TEMPERATURE_OFFSET, default="4°C"): cv.temperature,
            cv.Optional(CONF_AMBIENT_PRESSURE_COMPENSATION_SOURCE): cv.use_id(
                sensor.Sensor
            ),
        }
    )
    .extend(cv.polling_component_schema("60s"))
    .extend(i2c.i2c_device_schema(0x62))
)

SENSOR_MAP = {
    CONF_CO2: "set_co2_sensor",
    CONF_TEMPERATURE: "set_temperature_sensor",
    CONF_HUMIDITY: "set_humidity_sensor",
}

SETTING_MAP = {
    CONF_AUTOMATIC_SELF_CALIBRATION: "set_automatic_self_calibration",
    CONF_ALTITUDE_COMPENSATION: "set_altitude_compensation",
    CONF_AMBIENT_PRESSURE_COMPENSATION: "set_ambient_pressure_compensation",
    CONF_TEMPERATURE_OFFSET: "set_temperature_offset",
}


async def to_code(config):
    var = cg.new_Pvariable(config[CONF_ID])
    await cg.register_component(var, config)
    await i2c.register_i2c_device(var, config)

    for key, funcName in SETTING_MAP.items():
        if key in config:
            cg.add(getattr(var, funcName)(config[key]))

    for key, funcName in SENSOR_MAP.items():
        if key in config:
            sens = await sensor.new_sensor(config[key])
            cg.add(getattr(var, funcName)(sens))

    if CONF_AMBIENT_PRESSURE_COMPENSATION_SOURCE in config:
        sens = await cg.get_variable(config[CONF_AMBIENT_PRESSURE_COMPENSATION_SOURCE])
        cg.add(var.set_ambient_pressure_source(sens))