import esphome.codegen as cg
import esphome.config_validation as cv
from esphome.components import sensor, uart
from esphome.const import (
    CONF_CURRENT,
    CONF_ID,
    CONF_POWER,
    CONF_VOLTAGE,
    CONF_ENERGY,
    DEVICE_CLASS_CURRENT,
    DEVICE_CLASS_ENERGY,
    DEVICE_CLASS_POWER,
    DEVICE_CLASS_VOLTAGE,
    STATE_CLASS_MEASUREMENT,
    STATE_CLASS_TOTAL_INCREASING,
    UNIT_VOLT,
    UNIT_AMPERE,
    UNIT_WATT,
    UNIT_WATT_HOURS,
)

DEPENDENCIES = ["uart"]

pzem004t_ns = cg.esphome_ns.namespace("pzem004t")
PZEM004T = pzem004t_ns.class_("PZEM004T", cg.PollingComponent, uart.UARTDevice)

CONFIG_SCHEMA = (
    cv.Schema(
        {
            cv.GenerateID(): cv.declare_id(PZEM004T),
            cv.Optional(CONF_VOLTAGE): sensor.sensor_schema(
                unit_of_measurement=UNIT_VOLT,
                accuracy_decimals=1,
                device_class=DEVICE_CLASS_VOLTAGE,
                state_class=STATE_CLASS_MEASUREMENT,
            ),
            cv.Optional(CONF_CURRENT): sensor.sensor_schema(
                unit_of_measurement=UNIT_AMPERE,
                accuracy_decimals=2,
                device_class=DEVICE_CLASS_CURRENT,
                state_class=STATE_CLASS_MEASUREMENT,
            ),
            cv.Optional(CONF_POWER): sensor.sensor_schema(
                unit_of_measurement=UNIT_WATT,
                accuracy_decimals=0,
                device_class=DEVICE_CLASS_POWER,
                state_class=STATE_CLASS_MEASUREMENT,
            ),
            cv.Optional(CONF_ENERGY): sensor.sensor_schema(
                unit_of_measurement=UNIT_WATT_HOURS,
                accuracy_decimals=0,
                device_class=DEVICE_CLASS_ENERGY,
                state_class=STATE_CLASS_TOTAL_INCREASING,
            ),
        }
    )
    .extend(cv.polling_component_schema("60s"))
    .extend(uart.UART_DEVICE_SCHEMA)
)


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

    if CONF_VOLTAGE in config:
        conf = config[CONF_VOLTAGE]
        sens = await sensor.new_sensor(conf)
        cg.add(var.set_voltage_sensor(sens))
    if CONF_CURRENT in config:
        conf = config[CONF_CURRENT]
        sens = await sensor.new_sensor(conf)
        cg.add(var.set_current_sensor(sens))
    if CONF_POWER in config:
        conf = config[CONF_POWER]
        sens = await sensor.new_sensor(conf)
        cg.add(var.set_power_sensor(sens))
    if CONF_ENERGY in config:
        conf = config[CONF_ENERGY]
        sens = await sensor.new_sensor(conf)
        cg.add(var.set_energy_sensor(sens))
