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

CONF_KEYPAD = 'keypad'
CONF_KEY_ROWS = 'key_rows'
CONF_KEY_COLUMNS = 'key_columns'
CONF_SLEEP_TIME = 'sleep_time'
CONF_SCAN_TIME = 'scan_time'
CONF_DEBOUNCE_TIME = 'debounce_time'

DEPENDENCIES = ['i2c']
MULTI_CONF = True

sx1509_ns = cg.esphome_ns.namespace('sx1509')
SX1509GPIOMode = sx1509_ns.enum('SX1509GPIOMode')
SX1509_GPIO_MODES = {
    'INPUT': SX1509GPIOMode.SX1509_INPUT,
    'INPUT_PULLUP': SX1509GPIOMode.SX1509_INPUT_PULLUP,
    'OUTPUT': SX1509GPIOMode.SX1509_OUTPUT
}

SX1509Component = sx1509_ns.class_('SX1509Component', cg.Component, i2c.I2CDevice)
SX1509GPIOPin = sx1509_ns.class_('SX1509GPIOPin', cg.GPIOPin)

KEYPAD_SCHEMA = cv.Schema({
    cv.Required(CONF_KEY_ROWS): cv.int_range(min=1, max=8),
    cv.Required(CONF_KEY_COLUMNS): cv.int_range(min=1, max=8),
    cv.Optional(CONF_SLEEP_TIME): cv.int_range(min=128, max=8192),
    cv.Optional(CONF_SCAN_TIME): cv.int_range(min=1, max=128),
    cv.Optional(CONF_DEBOUNCE_TIME): cv.int_range(min=1, max=64),
})

CONFIG_SCHEMA = cv.Schema({
    cv.GenerateID(): cv.declare_id(SX1509Component),
    cv.Optional(CONF_KEYPAD): cv.Schema(KEYPAD_SCHEMA),
}).extend(cv.COMPONENT_SCHEMA).extend(i2c.i2c_device_schema(0x3E))


def to_code(config):
    var = cg.new_Pvariable(config[CONF_ID])
    yield cg.register_component(var, config)
    yield i2c.register_i2c_device(var, config)
    if CONF_KEYPAD in config:
        keypad = config[CONF_KEYPAD]
        cg.add(var.set_rows_cols(keypad[CONF_KEY_ROWS], keypad[CONF_KEY_COLUMNS]))
        if CONF_SLEEP_TIME in keypad and CONF_SCAN_TIME in keypad and CONF_DEBOUNCE_TIME in keypad:
            cg.add(var.set_sleep_time(keypad[CONF_SLEEP_TIME]))
            cg.add(var.set_scan_time(keypad[CONF_SCAN_TIME]))
            cg.add(var.set_debounce_time(keypad[CONF_DEBOUNCE_TIME]))


CONF_SX1509 = 'sx1509'
CONF_SX1509_ID = 'sx1509_id'

SX1509_OUTPUT_PIN_SCHEMA = cv.Schema({
    cv.Required(CONF_SX1509): cv.use_id(SX1509Component),
    cv.Required(CONF_NUMBER): cv.int_,
    cv.Optional(CONF_MODE, default="OUTPUT"): cv.enum(SX1509_GPIO_MODES, upper=True),
    cv.Optional(CONF_INVERTED, default=False): cv.boolean,
})
SX1509_INPUT_PIN_SCHEMA = cv.Schema({
    cv.Required(CONF_SX1509): cv.use_id(SX1509Component),
    cv.Required(CONF_NUMBER): cv.int_,
    cv.Optional(CONF_MODE, default="INPUT"): cv.enum(SX1509_GPIO_MODES, upper=True),
    cv.Optional(CONF_INVERTED, default=False): cv.boolean,
})


@pins.PIN_SCHEMA_REGISTRY.register(CONF_SX1509,
                                   (SX1509_OUTPUT_PIN_SCHEMA, SX1509_INPUT_PIN_SCHEMA))
def sx1509_pin_to_code(config):
    parent = yield cg.get_variable(config[CONF_SX1509])
    yield SX1509GPIOPin.new(parent, config[CONF_NUMBER], config[CONF_MODE],
                            config[CONF_INVERTED])