import esphome.codegen as cg
import esphome.config_validation as cv
from esphome import pins
from esphome.components import i2c
from esphome.const import CONF_ID, CONF_NUMBER, CONF_MODE, CONF_INVERTED

DEPENDENCIES = ["i2c"]
MULTI_CONF = True

pcf8574_ns = cg.esphome_ns.namespace("pcf8574")
PCF8574GPIOMode = pcf8574_ns.enum("PCF8574GPIOMode")
PCF8674_GPIO_MODES = {
    "INPUT": PCF8574GPIOMode.PCF8574_INPUT,
    "OUTPUT": PCF8574GPIOMode.PCF8574_OUTPUT,
}

PCF8574Component = pcf8574_ns.class_("PCF8574Component", cg.Component, i2c.I2CDevice)
PCF8574GPIOPin = pcf8574_ns.class_("PCF8574GPIOPin", cg.GPIOPin)

CONF_PCF8574 = "pcf8574"
CONF_PCF8575 = "pcf8575"
CONFIG_SCHEMA = (
    cv.Schema(
        {
            cv.Required(CONF_ID): cv.declare_id(PCF8574Component),
            cv.Optional(CONF_PCF8575, default=False): cv.boolean,
        }
    )
    .extend(cv.COMPONENT_SCHEMA)
    .extend(i2c.i2c_device_schema(0x21))
)


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)
    cg.add(var.set_pcf8575(config[CONF_PCF8575]))


def validate_pcf8574_gpio_mode(value):
    value = cv.string(value)
    if value.upper() == "INPUT_PULLUP":
        raise cv.Invalid(
            "INPUT_PULLUP mode has been removed in 1.14 and been combined into "
            "INPUT mode (they were the same thing). Please use INPUT instead."
        )
    return cv.enum(PCF8674_GPIO_MODES, upper=True)(value)


PCF8574_OUTPUT_PIN_SCHEMA = cv.Schema(
    {
        cv.Required(CONF_PCF8574): cv.use_id(PCF8574Component),
        cv.Required(CONF_NUMBER): cv.int_,
        cv.Optional(CONF_MODE, default="OUTPUT"): validate_pcf8574_gpio_mode,
        cv.Optional(CONF_INVERTED, default=False): cv.boolean,
    }
)
PCF8574_INPUT_PIN_SCHEMA = cv.Schema(
    {
        cv.Required(CONF_PCF8574): cv.use_id(PCF8574Component),
        cv.Required(CONF_NUMBER): cv.int_,
        cv.Optional(CONF_MODE, default="INPUT"): validate_pcf8574_gpio_mode,
        cv.Optional(CONF_INVERTED, default=False): cv.boolean,
    }
)


@pins.PIN_SCHEMA_REGISTRY.register(
    "pcf8574", (PCF8574_OUTPUT_PIN_SCHEMA, PCF8574_INPUT_PIN_SCHEMA)
)
async def pcf8574_pin_to_code(config):
    parent = await cg.get_variable(config[CONF_PCF8574])
    return PCF8574GPIOPin.new(
        parent, config[CONF_NUMBER], config[CONF_MODE], config[CONF_INVERTED]
    )