import esphome.codegen as cg
from esphome.components import light, spi
import esphome.config_validation as cv
from esphome.const import (
    CONF_CHIPSET,
    CONF_NUM_LEDS,
    CONF_OUTPUT_ID,
    CONF_RGB_ORDER,
)
from esphome.types import ConfigType

spi_led_strip_ns = cg.esphome_ns.namespace("spi_led_strip")
SpiLedStrip = spi_led_strip_ns.class_(
    "SpiLedStrip", light.AddressableLight, spi.SPIDevice
)
SpiLedChipset = spi_led_strip_ns.enum("SpiLedChipset", is_class=True)
RGBOrder = spi_led_strip_ns.enum("RGBOrder", is_class=True)

CHIPSET_APA102 = "APA102"
CHIPSET_WS2801 = "WS2801"

CHIPSETS = {
    CHIPSET_APA102: SpiLedChipset.SPI_LED_CHIPSET_APA102,
    CHIPSET_WS2801: SpiLedChipset.SPI_LED_CHIPSET_WS2801,
}

RGB_ORDERS = {
    "RGB": RGBOrder.ORDER_RGB,
    "RBG": RGBOrder.ORDER_RBG,
    "GRB": RGBOrder.ORDER_GRB,
    "GBR": RGBOrder.ORDER_GBR,
    "BGR": RGBOrder.ORDER_BGR,
    "BRG": RGBOrder.ORDER_BRG,
}

BASE_SCHEMA = light.ADDRESSABLE_LIGHT_SCHEMA.extend(
    {
        cv.GenerateID(CONF_OUTPUT_ID): cv.declare_id(SpiLedStrip),
        cv.Optional(CONF_NUM_LEDS, default=1): cv.positive_not_null_int,
    }
)


def rgb_order_schema(default: str) -> cv.Schema:
    return cv.Schema(
        {
            cv.Optional(CONF_RGB_ORDER, default=default): cv.enum(
                RGB_ORDERS, upper=True
            ),
        }
    )


CONFIG_SCHEMA = cv.typed_schema(
    {
        CHIPSET_APA102: BASE_SCHEMA.extend(rgb_order_schema("BGR")).extend(
            spi.spi_device_schema(False, "1MHz")
        ),
        # WS2801 latches the data when the clock stays low, so the clock must idle low
        CHIPSET_WS2801: BASE_SCHEMA.extend(rgb_order_schema("RGB")).extend(
            spi.spi_device_schema(False, "1MHz", "MODE0")
        ),
    },
    key=CONF_CHIPSET,
    default_type=CHIPSET_APA102,
    enum=CHIPSETS,
    upper=True,
)


async def to_code(config: ConfigType) -> None:
    chipset = config[CONF_CHIPSET]
    if chipset == CHIPSET_WS2801:
        cg.add_define("USE_SPI_LED_STRIP_WS2801")
    var = cg.new_Pvariable(config[CONF_OUTPUT_ID], config[CONF_NUM_LEDS], chipset)
    cg.add(var.set_rgb_order(config[CONF_RGB_ORDER]))
    await light.register_light(var, config)
    await spi.register_spi_device(var, config)
    await cg.register_component(var, config)