#!/usr/bin/env python
# -*- coding: UTF-8 -*-

try:
    import pifacedigitalio
except ImportError:
    pifacedigitalio = None
import config
import geo
import json
import logging
import mqtt
import state_machine
import task
import random
import socket
import time

try:
    from config import APP_NAME as ROOT_LOGGER_NAME
except ImportError:
    ROOT_LOGGER_NAME = 'root'
logger = logging.getLogger(ROOT_LOGGER_NAME).getChild(__name__)


class pi_face(object):
    LOG_PREFIX = 'PiFace:'

    PF_OUT_NAMES = ['Output 0',     # 0
                    'Output 1',     # 1
                    'Output 2',     # 2
                    'Ploenlein',    # 3
                    'Bakery',       # 4
                    'Mill',         # 5
                    'Reese House',  # 6
                    'Bake House']   # 7

    def __init__(self, client):
        self.__client__ = client

        if pifacedigitalio is not None:
            pifacedigitalio.init()
            pi = pifacedigitalio.PiFaceDigital()
            self.__pf_outputs__ = pi.output_pins
        self.__pf_output_states__ = 8 * [False]
        #
        self._reload = 0
        self._task_10ms = task.periodic(0.01 - 0.007, self.task_10ms)
        #
        for i in range(0, 8):
            self.set_output(i, self.__pf_output_states__[i])

    def set_output(self, index, state, tries=5):
        tries = min(max(1, tries), 5)
        try_txt = ['1st', '2nd', '3rd', '4th', '5th']
        state = state is True
        if pifacedigitalio is not None:
            cnt = 0
            while (cnt < tries) and (self.__pf_outputs__[index].value != state):
                self.__pf_outputs__[index].value = 1 * state
                time.sleep(0.1)
                cnt += 1
            if self.__pf_outputs__[index].value != state:
                logger.warning('%s Control of output[%d] (%s) after %s try not successfull!', self.LOG_PREFIX, index, self.PF_OUT_NAMES[index], try_txt[cnt - 1])
            else:
                logger.info('%s Set output "%s" to %s.', self.LOG_PREFIX, self.PF_OUT_NAMES[index], repr(state))
            self.__pf_output_states__[index] = self.__pf_outputs__[index].value == 1
        else:
            logger.info('%s Set virtual output "%s" to %s.', self.LOG_PREFIX, self.PF_OUT_NAMES[index], repr(state))
            self.__pf_output_states__[index] = state

    def get_output(self, index):
        return self.__pf_output_states__[index]

    def get_ploenlein(self):
        return self.get_output(3)

    def set_bakery(self, state):
        self.set_output(4, state)

    def get_bakery(self):
        return self.get_output(4)

    def set_mill(self, state):
        self.set_output(5, state)

    def get_mill(self):
        return self.get_output(5)

    def set_ploenlein(self, state):
        self.set_output(3, state)

    def set_reese_house(self, state):
        self.set_output(6, state)

    def get_reese_house(self):
        return self.get_output(6)

    def set_bake_house(self, state):
        if state is True:
            self.set_output(7, state)
            self._task_10ms.run()
        elif state is False:
            self._task_10ms.stop()
            self.join()
            time.sleep(0.1)
            self.set_output(7, state)

    def get_bake_house(self):
        return not self._task_10ms._stopped

    def task_10ms(self, task_inst):
        if self._reload <= 0:
            if pifacedigitalio is not None:
                self.__pf_outputs__[7].turn_on()
            self._reload = random.choice(2 * [0] + 20 * [1] + 1 * [2])
        else:
            if pifacedigitalio is not None:
                self.__pf_outputs__[7].turn_off()
            self._reload -= 1

    def join(self):
        self._task_10ms.join()

    def stop(self):
        try:
            self._task_10ms.stop()
            self._task_10ms.join()
        except AttributeError:
            pass    # seems that there was an exception before init of task
        for i in range(0, 8):
            self.set_output(i, False)
        pifacedigitalio.deinit()

    def __del__(self):
        self.stop()


class state_machine_mode(state_machine.state_machine):
    LOG_PREFIX = 'LeykMode:'

    STATE_AUTOMATIC = 'automatic'
    STATE_MANUAL = 'manual'

    CONDITION_EXTERNAL_TRIGGER = 'external_trigger'

    TRANSITIONS = {
        STATE_AUTOMATIC: (
            (CONDITION_EXTERNAL_TRIGGER, 1, STATE_MANUAL),
        ),
        STATE_MANUAL: (
            (CONDITION_EXTERNAL_TRIGGER, 1, STATE_AUTOMATIC),
        ),
    }

    def __init__(self, **kwargs):
        state_machine.state_machine.__init__(self, self.STATE_AUTOMATIC, logging.INFO)
        self.__reset_triggers__()

    def __reset_triggers__(self):
        self.__to_automatic__ = False
        self.__to_manual__ = False

    def external_trigger(self):
        rv = False
        if self.this_state() == self.STATE_AUTOMATIC:
            rv = self.__to_manual__
        elif self.this_state() == self.STATE_MANUAL:
            rv = self.__to_automatic__
        self.__reset_triggers__()
        return rv
        
    def trigger_to_maual(self):
        if self.this_state() == self.STATE_AUTOMATIC:
            self.__to_manual__ = True
            return True
        return False

    def trigger_to_automatic(self):
        if self.this_state() == self.STATE_MANUAL:
            self.__to_automatic__ = True
            return True
        return False


class state_machine_day_state(state_machine.state_machine):
    LOG_PREFIX = 'LeykState:'

    STATE_IDLE = 'idle'
    STATE_WAKE = 'wake'
    STATE_SUNRISE = 'sunrise'
    STATE_SUNSET = 'sunset'
    STATE_SLEEP = 'sleep'

    CONDITION_WAKE = 'condition_wake'
    CONDITION_SUNRISE = 'condition_sunrise'
    CONDITION_SUNSET = 'condition_sunset'
    CONDITION_SLEEP = 'condition_sleep'
    CONDITION_IDLE = 'condition_idle'

    TRANSITIONS = {
        STATE_IDLE: (
            (CONDITION_WAKE, 1, STATE_WAKE),
            (CONDITION_SUNRISE, 1, STATE_SUNRISE),
            (CONDITION_SUNSET, 1, STATE_SUNSET),
            (CONDITION_SLEEP, 1, STATE_SLEEP),
        ),
        STATE_WAKE: (
            (CONDITION_SUNRISE, 1, STATE_SUNRISE),
            (CONDITION_IDLE, 1, STATE_IDLE),
        ),
        STATE_SUNRISE: (
            (CONDITION_SLEEP, 1, STATE_SLEEP),
            (CONDITION_SUNSET, 1, STATE_SUNSET),
            (CONDITION_IDLE, 1, STATE_IDLE),
        ),
        STATE_SUNSET: (
            (CONDITION_SLEEP, 1, STATE_SLEEP),
            (CONDITION_IDLE, 1, STATE_IDLE),
        ),
        STATE_SLEEP: (
            (CONDITION_WAKE, 1, STATE_WAKE),
            (CONDITION_SUNRISE, 1, STATE_SUNRISE),
            (CONDITION_IDLE, 1, STATE_IDLE),
        ),
    }

    def __init__(self, **kwargs):
        state_machine.state_machine.__init__(self, self.STATE_IDLE, logging.INFO, **kwargs)

    def __current_state_calc__(self):
        def wake_time():
            tm = time.localtime()
            tm = list(tm)
            tm[3] = 6   # tm_hour
            tm[4] = 0   # tm_min
            tm[5] = 0   # tm_sec=0
            return time.mktime(time.struct_time(tm))
    
        def sunrise_time():
            return time.mktime(geo.sun.sunrise(config.GEO_POSITION)) + 30 * 60
    
        def sunset_time():
            return time.mktime(geo.sun.sunset(config.GEO_POSITION)) - 30 * 60
    
        def sleep_time():
            tm = time.localtime()
            tm = list(tm)
            tm[3] = 21  # tm_hour
            tm[4] = 15  # tm_min
            tm[5] = 0   # tm_sec=0
            return time.mktime(time.struct_time(tm))

        now = time.mktime(time.localtime())
        if now > sleep_time():
            return self.STATE_SLEEP
        elif now > sunset_time():
            return self.STATE_SUNSET
        elif now > sunrise_time():
            return self.STATE_SUNRISE
        elif now > wake_time():
            return self.STATE_WAKE
        else:
            return self.STATE_IDLE

    def condition_wake(self):
        if self.condition_idle():
            return False
        return self.__current_state_calc__() == self.STATE_WAKE

    def condition_sunrise(self):
        if self.condition_idle():
            return False
        return self.__current_state_calc__() == self.STATE_SUNRISE

    def condition_sunset(self):
        if self.condition_idle():
            return False
        return self.__current_state_calc__() == self.STATE_SUNSET

    def condition_sleep(self):
        if self.condition_idle():
            return False
        return self.__current_state_calc__() == self.STATE_SLEEP

    def condition_idle(self):
        return not self.sm_mode.this_state_is(self.sm_mode.STATE_AUTOMATIC)

    def report_sunset_sunrise(self):
        state_machine.logger.debug('Sunrise: %s - Sunset: %s;', time.strftime("%H:%M", geo.sun.sunrise(config.GEO_POSITION)), time.strftime("%H:%M", geo.sun.sunset(config.GEO_POSITION))
)


class leyk(object):
    LOG_PREFIX = 'Leyk:'

    TOPIC_BAKE_HOUSE = config.MQTT_TOPIC + '/status/Bake House'
    TOPIC_BAKERY = config.MQTT_TOPIC + '/status/Bakery'
    TOPIC_MILL = config.MQTT_TOPIC + '/status/Mill'
    TOPIC_MODE = config.MQTT_TOPIC + '/status/mode'
    TOPIC_MODE_BOOL = config.MQTT_TOPIC + '/status/mode_bool'
    TOPIC_PLOENLEIN = config.MQTT_TOPIC + '/status/Ploenlein'
    TOPIC_REESE_HOUSE = config.MQTT_TOPIC + '/status/Reese House'
    TOPIC_STATE = config.MQTT_TOPIC + '/status/state'


    RX_TOPIC_BAKE_HOUSE = config.MQTT_TOPIC + '/set/Bake House'
    RX_TOPIC_BAKERY = config.MQTT_TOPIC + '/set/Bakery'
    RX_TOPIC_MILL = config.MQTT_TOPIC + '/set/Mill'
    RX_TOPIC_MODE = config.MQTT_TOPIC + '/set/mode'
    RX_TOPIC_PLOENLEIN = config.MQTT_TOPIC + '/set/Ploenlein'
    RX_TOPIC_REESE_HOUSE = config.MQTT_TOPIC + '/set/Reese House'

    RX_TOPICS = [
        RX_TOPIC_BAKE_HOUSE,
        RX_TOPIC_BAKERY,
        RX_TOPIC_MILL,
        RX_TOPIC_MODE,
        RX_TOPIC_PLOENLEIN,
        RX_TOPIC_REESE_HOUSE
    ]


    def __init__(self):
        self.__client__ = mqtt.mqtt_client(config.APP_NAME, config.MQTT_SERVER, 1883, config.MQTT_USER, config.MQTT_PASS)
        self.__client__.add_callback(self.RX_TOPIC_BAKE_HOUSE, self.__rx_bake_house__)
        self.__client__.add_callback(self.RX_TOPIC_BAKERY, self.__rx_bakery__)
        self.__client__.add_callback(self.RX_TOPIC_MILL, self.__rx_mill__)
        self.__client__.add_callback(self.RX_TOPIC_PLOENLEIN, self.__rx_ploenlein__)
        self.__client__.add_callback(self.RX_TOPIC_REESE_HOUSE, self.__rx_reese_house__)
        self.__client__.add_callback(self.RX_TOPIC_MODE, self.__rx_mode__)

        self.TOPIC_DATA = {
            self.TOPIC_BAKE_HOUSE: self.get_bake_house,
            self.TOPIC_BAKERY: self.get_bakery,
            self.TOPIC_MILL: self.get_mill,
            self.TOPIC_MODE: self.get_mode,
            self.TOPIC_MODE_BOOL: self.get_mode_bool,
            self.TOPIC_PLOENLEIN: self.get_ploenlein,
            self.TOPIC_REESE_HOUSE: self.get_reese_house,
            self.TOPIC_STATE: self.get_state
        }

        self.sm_mode = state_machine_mode()
        self.sm_day_state = state_machine_day_state(sm_mode=self.sm_mode)
        self.__pf__ = pi_face(self.__client__)
        self._queue = task.threaded_queue()
        self._queue.run()
        self._task_1s = task.periodic(1, self.task_1s)
        self._task_1s.run()
        self.sm_mode.register_state_change_callback(self.sm_mode.STATE_MANUAL, None, self._queue.clean_queue)
        self.sm_mode.register_state_change_callback(None, None, self.publish, self.TOPIC_MODE)
        self.sm_mode.register_state_change_callback(None, None, self.publish, self.TOPIC_MODE_BOOL)
        self.sm_day_state.register_state_change_callback(None, None, self.clean_queue)
        self.sm_day_state.register_state_change_callback(None, None, self.publish, self.TOPIC_STATE)
        self.sm_day_state.register_state_change_callback(self.sm_day_state.STATE_SLEEP, None, self.sm_day_state.report_sunset_sunrise)
        self.sm_day_state.register_state_change_callback(self.sm_day_state.STATE_SLEEP, None, self.fill_sleep_queue)
        self.sm_day_state.register_state_change_callback(self.sm_day_state.STATE_SUNRISE, None, self.sm_day_state.report_sunset_sunrise)
        self.sm_day_state.register_state_change_callback(self.sm_day_state.STATE_SUNRISE, None, self.fill_sunrise_queue)
        self.sm_day_state.register_state_change_callback(self.sm_day_state.STATE_SUNSET, None, self.sm_day_state.report_sunset_sunrise)
        self.sm_day_state.register_state_change_callback(self.sm_day_state.STATE_SUNSET, None, self.fill_sunset_queue)
        self.sm_day_state.register_state_change_callback(self.sm_day_state.STATE_WAKE, None, self.sm_day_state.report_sunset_sunrise)
        self.sm_day_state.register_state_change_callback(self.sm_day_state.STATE_WAKE, None, self.fill_wake_queue)

        self.publish(self.TOPIC_MODE)
        self.publish(self.TOPIC_MODE_BOOL)
        self.publish(self.TOPIC_STATE)

    def __rx_bake_house__(self, client, userdata, message):
        self.set_bake_house(message.payload == b'true')

    def __rx_bakery__(self, client, userdata, message):
        self.set_bakery(message.payload == b'true')

    def __rx_mill__(self, client, userdata, message):
        self.set_mill(message.payload == b'true')

    def __rx_ploenlein__(self, client, userdata, message):
        self.set_ploenlein(message.payload == b'true')

    def __rx_reese_house__(self, client, userdata, message):
        self.set_reese_house(message.payload == b'true')

    def __rx_mode__(self, client, userdata, message):
        self.set_mode(self.sm_mode.STATE_AUTOMATIC if message.payload == b'true' else self.sm_mode.STATE_MANUAL)

    def publish_states(self):
        for name in self.TOPIC_DATA:
            self.publish(name)

    def publish(self, topic):
        logger.info("Sending Leyk status information to mqtt %s = %s", topic, json.dumps(self.TOPIC_DATA[topic]()))
        try:
            self.__client__.send(topic, json.dumps(self.TOPIC_DATA[topic]()))
        except (socket.timeout, OSError) as e:
            logger.warning("Error while sending state information information")

    def set_mode(self, mode):
        if mode == self.sm_mode.STATE_AUTOMATIC:
            rv = self.sm_mode.trigger_to_automatic()
        elif mode == self.sm_mode.STATE_MANUAL:
            rv = self.sm_mode.trigger_to_maual()
        else:
            rv = False
        return rv

    def get_mode(self):
        return self.sm_mode.this_state()

    def get_mode_bool(self):
        return self.get_mode() == self.sm_mode.STATE_AUTOMATIC

    def get_state(self):
        return self.sm_day_state.this_state()

    def __queue_wrapper__(self, queue_inst, function, *args, **kwargs):
        function(*args, **kwargs)

    def set_ploenlein(self, state, force=False):
        if force or self.sm_mode.this_state_is(self.sm_mode.STATE_MANUAL):
            self.__pf__.set_ploenlein(state)
            self.publish(self.TOPIC_PLOENLEIN)
            return True
        else:
            return False

    def get_ploenlein(self):
        return self.__pf__.get_ploenlein()

    def set_bakery(self, state, force=False):
        if force or self.sm_mode.this_state_is(self.sm_mode.STATE_MANUAL):
            self.__pf__.set_bakery(state)
            self.publish(self.TOPIC_BAKERY)
            return True
        else:
            return False

    def get_bakery(self):
        return self.__pf__.get_bakery()

    def set_bake_house(self, state, force=False):
        if force or self.sm_mode.this_state_is(self.sm_mode.STATE_MANUAL):
            self.__pf__.set_bake_house(state)
            self.publish(self.TOPIC_BAKE_HOUSE)
            return True
        else:
            return False

    def get_bake_house(self):
        return self.__pf__.get_bake_house()

    def set_mill(self, state, force=False):
        if force or self.sm_mode.this_state_is(self.sm_mode.STATE_MANUAL):
            self.__pf__.set_mill(state)
            self.publish(self.TOPIC_MILL)
            return True
        else:
            return False

    def get_mill(self):
        return self.__pf__.get_mill()

    def set_reese_house(self, state, force=False):
        if force or self.sm_mode.this_state_is(self.sm_mode.STATE_MANUAL):
            self.__pf__.set_reese_house(state)
            self.publish(self.TOPIC_REESE_HOUSE)
            return True
        else:
            return False

    def get_reese_house(self):
        return self.__pf__.get_reese_house()

    def wake_time(self):
        tm = time.localtime()
        tm = list(tm)
        tm[3] = 6   # tm_hour
        tm[4] = 0   # tm_min
        tm[5] = 0   # tm_sec=0
        return time.mktime(time.struct_time(tm))

    def sunrise_time(self):
        return time.mktime(geo.sun.sunrise(config.GEO_POSITION)) + 30 * 60

    def sunset_time(self):
        return time.mktime(geo.sun.sunset(config.GEO_POSITION)) - 30 * 60

    def sleep_time(self):
        tm = time.localtime()
        tm = list(tm)
        tm[3] = 21  # tm_hour
        tm[4] = 15  # tm_min
        tm[5] = 0   # tm_sec=0
        return time.mktime(time.struct_time(tm))

    def identify_current_state(self):
        now = time.mktime(time.localtime())
        if now > self.sleep_time():
            return self.ST_SLEEP
        elif now > self.sunset_time():
            return self.ST_SUNSET
        elif now > self.sunrise_time():
            return self.ST_SUNRISE
        elif now > self.wake_time():
            return self.ST_WAKE
        else:
            return self.ST_SLEEP

    def wait(self, queue_inst, delay):
        if delay > 0:
            logger.debug('%s Wait for %d seconds initiated. %d elements left in queue.', self.LOG_PREFIX, delay, queue_inst.qsize())
            cnt = 0
            while cnt < delay * 5:
                if queue_inst.qsize() == 0:
                    logger.debug('%s Quit wait for %d seconds. %d elements left in queue.', self.LOG_PREFIX, delay, queue_inst.qsize())
                    break
                time.sleep(0.2)
                cnt += 1

    def clean_queue(self):
        if self._queue.qsize() > 0:
            logger.info('Cleaning up remaining %d elements from queue', self._queue.qsize())
            self._queue.clean_queue()

    def fill_wake_queue(self):
        no_delay = self.sm_day_state.previous_state_was(self.sm_day_state.STATE_IDLE)
        # WAKE
        self._queue.enqueue(1, self.__queue_wrapper__, self.set_bakery, True, True)
        self._queue.enqueue(2, self.wait, 0 if no_delay else 5 * 60)
        self._queue.enqueue(3, self.__queue_wrapper__, self.set_bake_house, True, True)
        self._queue.enqueue(4, self.wait, 0 if no_delay else 10 * 60)
        self._queue.enqueue(5, self.__queue_wrapper__, self.set_reese_house, True, True)
        self._queue.enqueue(6, self.wait, 0 if no_delay else 7 * 60)
        self._queue.enqueue(7, self.__queue_wrapper__, self.set_ploenlein, True, True)
        self._queue.enqueue(8, self.wait, 0 if no_delay else 8 * 60)
        self._queue.enqueue(9, self.__queue_wrapper__, self.set_mill, True, True)

    def fill_sunrise_queue(self):
        no_delay = self.sm_day_state.previous_state_was(self.sm_day_state.STATE_IDLE)
        # SUNRISE
        self._queue.enqueue(1, self.__queue_wrapper__, self.set_bake_house, True, True)
        self._queue.enqueue(2, self.__queue_wrapper__, self.set_ploenlein, False, True)
        self._queue.enqueue(3, self.wait, 0 if no_delay else 5 * 60)
        self._queue.enqueue(4, self.__queue_wrapper__, self.set_mill, False, True)
        self._queue.enqueue(5, self.wait, 0 if no_delay else 8 * 60)
        self._queue.enqueue(6, self.__queue_wrapper__, self.set_bakery, False, True)
        self._queue.enqueue(7, self.wait, 0 if no_delay else 12 * 60)
        self._queue.enqueue(8, self.__queue_wrapper__, self.set_reese_house, False, True)

    def fill_sunset_queue(self):
        no_delay = self.sm_day_state.previous_state_was(self.sm_day_state.STATE_IDLE)
        # SUNSET
        self._queue.enqueue(1, self.__queue_wrapper__, self.set_bake_house, True, True)
        self._queue.enqueue(2, self.__queue_wrapper__, self.set_bakery, True, True)
        self._queue.enqueue(3, self.wait, 0 if no_delay else 10 * 60)
        self._queue.enqueue(4, self.__queue_wrapper__, self.set_reese_house, True, True)
        self._queue.enqueue(5, self.wait, 0 if no_delay else 8 * 60)
        self._queue.enqueue(6, self.__queue_wrapper__, self.set_mill, True, True)
        self._queue.enqueue(7, self.wait, 0 if no_delay else 7 * 60)
        self._queue.enqueue(8, self.__queue_wrapper__, self.set_ploenlein, True, True)

    def fill_sleep_queue(self):
        no_delay = self.sm_day_state.previous_state_was(self.sm_day_state.STATE_IDLE)
        # SLEEP
        self._queue.enqueue(1, self.__queue_wrapper__, self.set_bake_house, False, True)
        self._queue.enqueue(2, self.wait, 0 if no_delay else 5 * 60)
        self._queue.enqueue(3, self.__queue_wrapper__, self.set_bakery, False, True)
        self._queue.enqueue(4, self.wait, 0 if no_delay else 9 * 60)
        self._queue.enqueue(5, self.__queue_wrapper__, self.set_ploenlein, False, True)
        self._queue.enqueue(6, self.wait, 0 if no_delay else 9 * 60)
        self._queue.enqueue(7, self.__queue_wrapper__, self.set_mill, False, True)
        self._queue.enqueue(8, self.wait, 0 if no_delay else 6 * 60)
        self._queue.enqueue(9, self.__queue_wrapper__, self.set_reese_house, False, True)

    def task_1s(self, task_inst):
        self.sm_mode.work()
        self.sm_day_state.work()

    def join(self):
        self._task_1s.join()
        self._queue.join()

    def stop(self):
        self._task_1s.stop()
        self._queue.stop()

    def __del__(self):
        self.__client__.loop_stop()                                              # stop the loop
        self.stop()