#!/usr/bin/env python3

from bluepy import btle
from bluepy.btle import BTLEDisconnectError

from miband import miband
import sleepdata

import threading
import re
import random

import subprocess
import time
from datetime import datetime

auth_key_filename = 'auth_key.txt'
mac_filename = 'mac.txt'
csv_filename = "sleep_data.csv"

band = None

buzz_timer = time.time()
buzz_minutes = 45
buzz_delay = buzz_minutes * 60

#-------------------------------------------------------------------------#

class regex_patterns():
    mac_regex_pattern = re.compile(r'([0-9a-fA-F]{2}(?::[0-9a-fA-F]{2}){5})')
    authkey_regex_pattern = re.compile(r'([0-9a-fA-F]){32}')


def get_mac_address(filename):
    try:
        with open(filename, "r") as f:
            hwaddr_search = re.search(regex_patterns.mac_regex_pattern, f.read().strip())
            if hwaddr_search:
                MAC_ADDR = hwaddr_search[0]
            else:
                print ("No valid MAC address found in {}".format(filename))
                exit(1)
    except FileNotFoundError:
            print ("MAC file not found: {}".format(filename))
            exit(1)
    return MAC_ADDR


def get_auth_key(filename):
    try:
        with open(filename, "r") as f:
            key_search = re.search(regex_patterns.authkey_regex_pattern, f.read().strip())
            if key_search:
                AUTH_KEY = bytes.fromhex(key_search[0])
            else:
                print ("No valid auth key found in {}".format(filename))
                exit(1)
    except FileNotFoundError:
            print ("Auth key file not found: {}".format(filename))
            exit(1)
    return AUTH_KEY

def process_data(data, tick_time):
    if data[0] == "GYRO":
        sleepdata.process_gyro_data(data[1], tick_time)
    elif data[0] == "HR":
        sleepdata.process_heartrate_data(data[1], tick_time)

def average_data(tick_time):
    if (tick_time - sleepdata.last_tick_time) >= sleepdata.tick_seconds:
        sleepdata.average_raw_data(tick_time)
        sleepdata.last_tick_time = time.time()

def timed_buzzing(buzz_delay, buzz_duration):
    buzz_timer = time.time()
    tick_time = time.time()
    while True:
        elapsed_time = tick_time - buzz_timer
        if elapsed_time >= buzz_delay:
            print("Buzz timer expired, buzzing")
            vibrate_random(buzz_duration)
            buzz_timer = tick_time
        else:
             tick_time = time.time()
        time.sleep(1)

def generate_random_vibration_pattern(count):
    pulse_pattern = []
    pulse_range = [120, 240]
    pulse_interval_range = [1, 8]
    for _ in range(count):
        buzz_pulse = random.randrange(pulse_range[0], pulse_range[1])
        buzz_delay = random.randrange(pulse_interval_range[0], pulse_interval_range[1])/10
        pulse_pattern.append([buzz_pulse, buzz_delay])
    return pulse_pattern

def vibrate_random(duration):
    print("Sending random vibration...")
    duration_start = time.time()

    pulse_pattern = generate_random_vibration_pattern(20)

    while True:
        if (time.time() - duration_start) >= duration:
            print ("Stopping vibration")
            band.vibrate(0)
            break
        else:
            for pattern in pulse_pattern:
                if (time.time() - duration_start) >= duration:
                    break
                vibrate_ms = pattern[0]
                vibro_delay = pattern[1]
                band.vibrate(vibrate_ms)
                time.sleep(vibro_delay)
    


def sleep_monitor_callback(data):
    tick_time = time.time()
    if not sleepdata.last_tick_time:
        sleepdata.last_tick_time = time.time()
    process_data(data, tick_time)
    average_data(tick_time)

def connect(mac_filename, auth_key_filename):
    global band
    success = False
    timeout = 3
    msg = 'Connection to the band failed. Trying again in {} seconds'

    MAC_ADDR = get_mac_address(mac_filename)
    AUTH_KEY = get_auth_key(auth_key_filename)

    while not success:
        try:
            band = miband(MAC_ADDR, AUTH_KEY, debug=True)
            success = band.initialize()
        except BTLEDisconnectError:
            print(msg.format(timeout))
            time.sleep(timeout)
        except KeyboardInterrupt:
            print("\nExit.")
            exit()

def start_data_pull():
    while True:
        try:
            band.start_heart_and_gyro(sensitivity=1, callback=sleep_monitor_callback)
        except BTLEDisconnectError:
            band.gyro_started_flag = False
            connect()

def vibrate_pattern(duration):
    print("Sending vibration...")
    duration_start = time.time()
    pulse_pattern = [[30, 0.01], [60, 0.01], [90, 0.01], [120, 0.01], [150, 0.01], [180, 0.01]]

    while True:
        if (time.time() - duration_start) >= duration:
            print ("Stopping vibration")
            band.vibrate(0)
            break
        else:
            for pattern in pulse_pattern:
                if (time.time() - duration_start) >= duration:
                    break
                vibrate_ms = pattern[0]
                vibro_delay = pattern[1]
                band.vibrate(vibrate_ms)
                time.sleep(vibro_delay)

def vibrate_rolling():
    print("Sending rolling vibration...")
    for x in range(10):
        for x in range(20, 40, 1):
            band.vibrate(x)
        for x in range(40, 20, -1):
            band.vibrate(x)

if __name__ == "__main__":
    connect(mac_filename, auth_key_filename)
    threading.Thread(target=start_data_pull).start()
    threading.Thread(target=timed_buzzing, args=([buzz_delay, 15])).start()
    #sleepdata.init_graph()



#import simpleaudio as sa
# comfort_wav = 'comfort.wav'
# wave_obj = sa.WaveObject.from_wave_file(comfort_wav)
# comfort_delay = 30
# comfort_lasttime = time.time()