import datetime
import json
import logging
import os
import shutil
import threading
import time

from w1thermsensor import W1ThermSensor
import RPi.GPIO as GPIO

import heat

class Control(threading.Thread):
    def __init__(self, configfile):
        threading.Thread.__init__(self)
        self.__run_condition = True
        self.__config_file = configfile
        self.__config = None
        self.__log = logging.getLogger()
        self.__sensor = W1ThermSensor()
        self.__heat = None
        self.__trigger_read_config = True
        self.__water_state = []
        self.__temperature = None

    def reload_config(self):
        self.__log.info("Reloading configuration triggered")
        self.__trigger_read_config = True

    def load_config(self):
        try:
            with open(self.__config_file, "r", encoding="UTF-8") as handle:
                self.__config = json.load(handle)
        except FileNotFoundError:
            # create default config
            os.makedirs(os.path.dirname(self.__config_file), exist_ok=True)
            shutil.copyfile("config/config.json", self.__config_file)
            with open(self.__config_file, "r", encoding="UTF-8") as handle:
                self.__config = json.load(handle)
        if self.__heat is not None:
            self.__heat.stop()
        self.__heat = heat.Heat(int(self.__config['heat'][0]['pin']))
        for _ in range(len(self.__config['water'])):
            self.__water_state.append(False)
        # Configure all water pins
        GPIO.setwarnings(False)
        GPIO.setmode(GPIO.BCM)
        for entry in self.__config['water']:
            pin = int(entry['pin'])
            GPIO.setup(pin, GPIO.OUT)
            GPIO.output(pin, 1)

    def run(self):
        while self.__run_condition:
            if self.__trigger_read_config:
                self.__trigger_read_config = False
                self.load_config()
                self.__heat.start()

            tmp = round(float(self.__sensor.get_temperature()), 1)
            if tmp != self.__temperature:
                self.__temperature = tmp
                self.__log.info("Temperature: %.1f °C", self.__temperature)

            # handle heat
            if self.__config['heat'][0]['autostate']:
                on_temperature = float(self.__config['heat'][0]['on_temperature'])
                off_temperature = float(self.__config['heat'][0]['off_temperature'])
                if self.__temperature < on_temperature and not self.__heat.state():
                    self.__heat.on()
                    self.__log.info("heat on")
                elif self.__temperature > off_temperature and self.__heat.state():
                    self.__heat.off()
                    self.__log.info("heat off")

            # handle water entries
            water = self.__config['water']
            water_index = 0
            for entry in water:
                now = datetime.datetime.now()
                if entry['autostate']:
                    idx = 0
                    if int(now.hour) >= 12:
                        idx = 1
                    on_time_pattern = entry['times'][idx]['on_time']
                    on_time_pattern = on_time_pattern.split(':')
                    on_time = now.replace(hour=int(on_time_pattern[0]),
                                          minute=int(on_time_pattern[1]),
                                          second=0,
                                          microsecond=0)
                    off_time_pattern = entry['times'][idx]['off_time']
                    off_time_pattern = off_time_pattern.split(':')
                    off_time = now.replace(hour=int(off_time_pattern[0]),
                                           minute=int(off_time_pattern[1]),
                                           second=0,
                                           microsecond=0)
                    pin = int(entry['pin'])

                    if now > on_time and now <= off_time and not self.__water_state[water_index]:
                        GPIO.output(pin, 0)
                        self.__water_state[water_index] = True
                        self.__log.info("water on")
                    elif now > off_time and self.__water_state[water_index]:
                        GPIO.output(pin, 1)
                        self.__water_state[water_index] = False
                        self.__log.info("water off")
                water_index += 1


            time.sleep(1)
        self.__heat.stop()


    def stop(self):
        self.__run_condition = False
        self.join()

    def get_current_temperature(self, ident: int):
        return f"{self.__temperature:.1f}"

    def get_current_heat_state(self, ident: int):
        return self.__heat.state()

    def get_current_water_state(self, ident: int):
        if ident > 0 and ident < len(self.__water_state):
            return self.__water_state[ident -1]
        return None

    def set_heat_state(self, ident: str):
        self.__heat.on()
        self.__log.info("heat on by button")

    def clear_heat_state(self, ident: str):
        self.__heat.off()
        self.__log.info("heat off by button")

    def set_water_state(self, ident: str):
        ident = int(ident)
        if ident > 0 and ident < len(self.__water_state):
            pin = int(self.__config['water'][ident - 1]['pin'])
            self.__water_state[ident - 1] = True
            self.__log.info("water on by button")
            GPIO.output(pin, 0)

    def clear_water_state(self, ident: str):
        ident = int(ident)
        if ident > 0 and ident < len(self.__water_state):
            pin = int(self.__config['water'][ident - 1]['pin'])
            self.__water_state[ident - 1] = False
            self.__log.info("water off by button")
            GPIO.output(pin, 1)