#!/usr/bin/env python3
# builtins
import click
import uvicorn
import os
import sys
import re
import importlib
from pprint import pprint
import urllib
import requests
import json
from datetime import datetime

from pyheatpump.logger import logger_init
from pyheatpump.models import *
from pyheatpump.db import commit

CONTEXT_SETTINGS={
    'default_map':{'run': {}}
}

@click.group(invoke_without_command=True, context_settings=CONTEXT_SETTINGS)
@click.option('--version', is_flag=True)
@click.pass_context
def cli(ctx, version):
    if version:
        from pyheatpump import version
        return click.echo(pyheatpump.version())


@click.option('--host', default=None)
@click.option('--port', default=None)
@cli.command()
def run(host, port):
    logger = logger_init()

    from .config import (API_HOST, API_PORT)

    if not host:
        host = API_HOST

    if not port:
        port = API_PORT

    log_level = 'info'

    click.echo('Launching PyHeatpump application')

    uvicorn.run('pyheatpump.app:application',
        host=host,
        port=int(port),
        log_level=log_level,
        workers=1)


@click.option('--type', '-t', default=None, multiple=True)
@cli.command()
def fetch(type):
    logger = logger_init()

    from pyheatpump import modbus

    if type is None:
        var_types = VariableType.getall()
    else:
        var_types = {}
        for label, var_type in VariableType.getall().items():
            if label in type or var_type.slabel in type:
                var_types[label] = var_type

    # Analog - float
    if 'Analog' in var_types.keys():
        analog = var_types['Analog']
        logger.info('Read analog variables in registers [{}, {}]'.format(
            analog.start_address, analog.end_address
        ))
        res = modbus.read_holding_registers(analog.start_address, analog.end_address)

        for r in range(len(res)):
            var = Variable(**{
                'type': analog,
                'address': r + analog.start_address})

            if not var.exists():
                logger.info('Insert variable {}:{}'.format(
                    var.type, var.address))
                var.insert()

            val = VariableValue(**{
                'type': var.type,
                'address': var.address,
                'value': res[r]})
            val.insert()


    # Integer - int
    if 'Integer' in var_types.keys():
        integer = var_types['Integer']
        logger.info('Read integer variables in registers [{}, {}]'.format(
            integer.start_address, integer.end_address
        ))
        res = modbus.read_holding_registers(integer.start_address, integer.end_address)

        for r in range(len(res)):
            var = Variable(**{
                'type': integer,
                'address': r + integer.start_address})

            if not var.exists():
                logger.info('Insert variable {}:{}'.format(
                    var.type, var.address))
                var.insert()

            val = VariableValue(**{
                'type': var.type,
                'address': var.address,
                'value': res[r]})
            val.insert()

    # Digital - bool
    if 'Digital' in var_types.keys():
        digital = var_types['Digital']
        logger.info('Read digital variables in coils [{}, {}]'.format(
            digital.start_address, digital.end_address
        ))
        res = modbus.read_coils(digital.start_address, digital.end_address)

        for r in range(len(res)):
            var = Variable(**{
                'type': digital,
                'address': r + digital.start_address})

            if not var.exists():
                logger.info('Insert variable {}:{}'.format(
                    var.type, var.address))
                var.insert()

            val = VariableValue(**{
                'type': var.type,
                'address': var.address,
                'value': res[r]})
            val.insert()

    commit()
    logger.info('Successfully read all variables')


@click.option('--since', is_flag=True)
@cli.command()
def supervise(since):
    logger = logger_init()

    from .config import config, mac_address_init, get_last_update, set_last_update
    mac_address = config.get('heatpump','mac_address')
    if mac_address == 'None':
        mac_address = mac_address_init()

    from .models.heatpump import Heatpump


    if not since:
        last_update = 0
    else:
        last_update = get_last_update()

    h = Heatpump(mac_address, last_update)

    base_url = {
        'scheme':config.get('supervisor', 'scheme'),
        'hostname':config.get('supervisor', 'host'),
        'port':config.getint('supervisor', 'port')
    }

    build_url = lambda d: '{scheme}://{hostname}:{port}{path}'.format(**d)

    """
    @TODO : Use a proper certificate 

    if base_url['scheme'] == 'https':
        certificate = config.get('supervisor', 'certificate')
        if not os.path.isfile(certificate):
            raise Exception(f'Certificate not found :{certificate}') 
        print(certificate)
    else:
        certificate = None
    """

    post_url = {
        **base_url,
        **{'path': config.get('supervisor', 'post_path')}
    }

    logger.info(build_url(post_url))
    data = h.__dict__()
    try:
        logger.debug(json.dumps(data))
    except Exception as e:
        print(e)
        sys.exit(1)


    post_resp = requests.post(
        url=build_url(post_url),
        json=data,
        verify=False
    )
    if post_resp.status_code == 200:
        logger.info('POST to supervisor succeeded')
        set_last_update(int(datetime.now().strftime('%s')))

    get_path = '/'.join((
        config.get('supervisor', 'get_path'),
        h.macformat
    ))
    get_url = {
        **base_url,
        **{'path': get_path}
    }

    get_resp = requests.get(
        url=build_url(get_url),
        verify=False
    )

    control_data = get_resp.json()
    if h.control(control_data):
        commit()
        logger.info('GET to supervisor succeded : updated values')
        set_last_update(int(datetime.now().strftime('%s')))
    else:
        logger.warn('Unable to set data from supervisor\n{}'.format(control_data))