import csv
import re
import click
import requests
from flask.cli import AppGroup
from formity.models import FaceshieldRequest, PostalCode, Status
from formity.extensions import db


cli = AppGroup('formity')

models = {
    'FaceshieldRequest': FaceshieldRequest,
    'PostalCode': PostalCode,
}

@cli.command('import')
@click.argument('input_file', type=click.File('r'))
@click.option('--model', type=click.Choice(models.keys()), default='FaceshieldRequest')
@click.option('--lookup', help='On which fields to lookup existing records', multiple=True)
@click.option('--columns', help='Override column names in CSV file')
@click.option('--map', help='CSV column -> model field mapping (ex. ID:id)', multiple=True)
@click.option('--nullable', help='If specified field is empty, assume it is None', multiple=True)
@click.option('--delimiter')
@click.option('--ignore-header/--no-ignore-header', help='Ignore first line of output if specifying custom fields', default=False)
@click.option('--commit-chunk', default=0)
def import_file(input_file, model, lookup, columns=None, delimiter=',', ignore_header=False, map=[], commit_chunk=0, nullable=[]):
    m = models.get(model)

    csv_reader = csv.reader(input_file, delimiter=delimiter)
    if columns:
        columns = columns.split(',')
        if ignore_header:
            next(csv_reader, None)
    else:
        columns = next(csv_reader, None)
    mapping = dict([m.split(':') for m in map])

    for idx, row in enumerate(csv_reader):
        row_data = {mapping.get(k, k): (None if v == '' and mapping.get(k,k) in nullable else v) for k, v in zip(columns, row)}
        lookup_query = {f: row_data[f] for f in lookup}
        try:
            obj = m.query.filter_by(**lookup_query).one()
            print('Updating object', lookup_query)
        except Exception as exc:
            obj = m()
            print('Creating new object', lookup_query, exc)

        for k, v in row_data.items():
            setattr(obj, k, v)
        db.session.add(obj)

        if commit_chunk and idx % commit_chunk == commit_chunk - 1:
            print('Commiting')
            db.session.commit()

    db.session.commit()


@cli.command('extract-postalcodes')
def extract_postalcodes():
    for r in FaceshieldRequest.query.all():
        code = re.findall(r'(\d{2})\s*-\s*(\d{3})', str(r.entity_info))
        if code and not r.shipping_postalcode:
            r.shipping_postalcode = '-'.join(code[0])
            r.shipping_city = PostalCode.query.get(r.shipping_postalcode).city
            print(r.id, r.shipping_postalcode)
    db.session.commit()


@cli.command('extract-places')
@click.option('--apikey')
def extract_places(apikey):
    places = FaceshieldRequest.query.filter(FaceshieldRequest.shipping_postalcode == None, FaceshieldRequest.status != Status.rejected, FaceshieldRequest.status != Status.spam).all()

    for data in places:
        print(' * [%d] %r' % (data.id, data.entity_info,))
        try:
            results = requests.get('https://maps.googleapis.com/maps/api/place/findplacefromtext/json', params={
                'input': data.entity_info,
                'inputtype': 'textquery',
                'fields': 'formatted_address',
                'key': apikey,
            }).json()

            if results['status'] == 'OK':
                address = results['candidates'][0]['formatted_address']
                re_result = re.findall(r'^(.*), (\d{2}-\d{3}) (.*), Polska$', address)
                if not re_result:
                    print(' -> unparseable', address)
                else:
                    data.shipping_street, data.shipping_postalcode, data.shipping_city = re_result[0]
                    print(' -> saved', data.shipping_street, data.shipping_postalcode, data.shipping_city)
            else:
                print(' -> not found (%s)' % (results['status'],))
        except Exception as exc:
            print(' -> failed (%s)' % (exc,))

    db.session.commit()