import esphome.codegen as cg
import esphome.config_validation as cv
from esphome.components import sensor, modbus
from esphome.const import CONF_CURRENT, CONF_ID, CONF_POWER, CONF_VOLTAGE, \
    UNIT_VOLT, ICON_FLASH, UNIT_AMPERE, UNIT_WATT, ICON_POWER, ICON_CURRENT_AC

AUTO_LOAD = ['modbus']

pzemdc_ns = cg.esphome_ns.namespace('pzemdc')
PZEMDC = pzemdc_ns.class_('PZEMDC', cg.PollingComponent, modbus.ModbusDevice)

CONFIG_SCHEMA = cv.Schema({
    cv.GenerateID(): cv.declare_id(PZEMDC),
    cv.Optional(CONF_VOLTAGE): sensor.sensor_schema(UNIT_VOLT, ICON_FLASH, 1),
    cv.Optional(CONF_CURRENT): sensor.sensor_schema(UNIT_AMPERE, ICON_CURRENT_AC, 3),
    cv.Optional(CONF_POWER): sensor.sensor_schema(UNIT_WATT, ICON_POWER, 1),
}).extend(cv.polling_component_schema('60s')).extend(modbus.modbus_device_schema(0x01))


def to_code(config):
    var = cg.new_Pvariable(config[CONF_ID])
    yield cg.register_component(var, config)
    yield modbus.register_modbus_device(var, config)

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