#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import time
from decimal import Decimal
from typing import cast

from bluepy.btle import BTLEDisconnectError
from serial import SerialException

from .config import get_config, get_consumers
from .constants import MAC
from .lib.feasycom_ble import BTLEUart
from .protocol import parse_battery_state, parse_historical_entry, try_read_parse
from .solar_types import DataName
from .util import Periodical, log


class CommunicationError(BTLEDisconnectError, SerialException):
    pass


def main():
    conf = get_config()
    consumers = get_consumers(conf)

    per_voltages = Periodical(interval=15)
    per_current_hist = Periodical(interval=60)
    # import serial

    # ser = serial.Serial()

    try:
        while True:
            try:
                log("Connecting...")
                with BTLEUart(MAC, timeout=5) as dev:
                    log("Connected.")

                    # write(dev, construct_request(0, 32))

                    # Memory dump
                    # for address in range(0, 0x10000, 16):
                    #    log(f"Reading 0x{address:04X}...")
                    #    write(wd, construct_request(address, 16))
                    days = 7
                    res = try_read_parse(dev, 0x010B, 21, parse_historical_entry)
                    if res:
                        log(res)
                        for consumer in consumers:
                            consumer.write(res)
                        days = cast(int, res.get("run_days", 7))

                    for i in range(days):
                        res = try_read_parse(
                            dev, 0xF000 + i, 10, parse_historical_entry
                        )
                        if res:
                            log({i: res})
                            for consumer in consumers:
                                consumer.write({str(i): res})

                    while True:
                        now = time.time()

                        if per_voltages(now):
                            data = try_read_parse(dev, 0x0100, 11, parse_battery_state)
                            if data:
                                data[DataName.CALCULATED_BATTERY_POWER] = float(
                                    Decimal(str(data.get(DataName.BATTERY_VOLTAGE, 0)))
                                    * Decimal(
                                        str(data.get(DataName.BATTERY_CURRENT, 0))
                                    )
                                )
                                data[DataName.CALCULATED_PANEL_POWER] = float(
                                    Decimal(str(data.get(DataName.PANEL_VOLTAGE, 0)))
                                    * Decimal(str(data.get(DataName.PANEL_CURRENT, 0)))
                                )
                                data[DataName.CALCULATED_LOAD_POWER] = float(
                                    Decimal(str(data.get(DataName.LOAD_VOLTAGE, 0)))
                                    * Decimal(str(data.get(DataName.LOAD_CURRENT, 0)))
                                )
                                log(data)
                                for consumer in consumers:
                                    consumer.write(data)

                        if per_current_hist(now):
                            data = try_read_parse(
                                dev, 0x010B, 21, parse_historical_entry
                            )
                            if data:
                                log(data)
                                for consumer in consumers:
                                    consumer.write(data)

                        # print(".")
                        for consumer in consumers:
                            consumer.poll()

                        time.sleep(max(0, 1 - time.time() - now))

                    # if STATUS.get('load_enabled'):
                    #    write(wd, CMD_DISABLE_LOAD)
                    # else:
                    #    write(wd, CMD_ENABLE_LOAD)

            except CommunicationError:
                log("ERROR: Disconnected")
                time.sleep(1)

    except (KeyboardInterrupt, SystemExit, Exception) as e:
        for consumer in consumers:
            consumer.exit()

        if type(e) is not KeyboardInterrupt:
            raise


if __name__ == "__main__":
    main()