"""
Cannabis Licenses | Get Illinois Licenses
Copyright (c) 2022 Cannlytics

Authors:
    Keegan Skeate <https://github.com/keeganskeate>
    Candace O'Sullivan-Sutherland <https://github.com/candy-o>
Created: 9/29/2022
Updated: 10/3/2022
License: <https://github.com/cannlytics/cannlytics/blob/main/LICENSE>

Description:

    Collect Illinois cannabis license data.

Data Source:

    - Illinois Department of Financial and Professional Regulation
    Licensed Adult Use Cannabis Dispensaries
    URL: <https://www.idfpr.com/LicenseLookup/AdultUseDispensaries.pdf>

"""
# Standard imports.
from datetime import datetime
import os
from typing import Optional

# External imports.
from dotenv import dotenv_values
from cannlytics.data.gis import geocode_addresses
import pandas as pd
import pdfplumber
import requests


# Specify where your data lives.
DATA_DIR = '../data/il'
ENV_FILE = '../.env'

# Specify state-specific constants.
STATE = 'IL'
ILLINOIS = {
    'licensing_authority_id': 'IDFPR',
    'licensing_authority': 'Illinois Department of Financial and Professional Regulation',
    'retailers': {
        'url': 'https://www.idfpr.com/LicenseLookup/AdultUseDispensaries.pdf',
        'columns': [
            'business_legal_name',
            'business_dba_name',
            'address',
            'medical',
            'issue_date',
            'license_number', 
        ],
    },
}


def get_licenses_il(
        data_dir: Optional[str] = None,
        env_file: Optional[str] = '.env',
        **kwargs,
    ):
    """Get Illinois cannabis license data."""

    # Create necessary directories.
    pdf_dir = f'{data_dir}/pdfs'
    if not os.path.exists(data_dir): os.makedirs(data_dir)
    if not os.path.exists(pdf_dir): os.makedirs(pdf_dir)

    # Download the retailers PDF.
    retailers_url = ILLINOIS['retailers']['url']
    filename = f'{pdf_dir}/illinois_retailers.pdf'
    response = requests.get(retailers_url)
    with open(filename, 'wb') as f:
        f.write(response.content)

    # Read the retailers PDF.
    pdf = pdfplumber.open(filename)

    # Get the table data, excluding the headers and removing empty cells.
    table_data = []
    for i, page in enumerate(pdf.pages):
        table = page.extract_table()
        if i == 0:
            table = table[4:]
            table = [c for row in table
                if (c := [elem for elem in row if elem is not None])]
        table_data += table
        
    # Standardize the data.
    licensee_columns = ILLINOIS['retailers']['columns']
    retailers = pd.DataFrame(table_data, columns=licensee_columns)
    retailers = retailers.assign(
        licensing_authority_id=ILLINOIS['licensing_authority_id'],
        licensing_authority=ILLINOIS['licensing_authority'],
        license_designation='Adult-Use',
        premise_state=STATE,
        license_status='Active',
        license_status_date=None,
        license_type='Commercial - Retailer',
        license_term=None,
        expiration_date=None,
        business_legal_name=retailers['business_dba_name'],
        business_owner_name=None,
        business_structure=None,
        business_email=None,
        activity=None,
        parcel_number=None,
        id=retailers['license_number'],
        business_image_url=None,
        business_website=None,
    )

    # Apply `medical` to `license_designation`
    retailers.loc[retailers['medical'] == 'Yes', 'license_designation'] = 'Adult-Use and Medicinal'
    retailers.drop(columns=['medical'], inplace=True)

    # Clean the organization names.
    retailers['business_legal_name'] = retailers['business_legal_name'].str.replace('\n', '', regex=False)
    retailers['business_dba_name'] = retailers['business_dba_name'].str.replace('*', '', regex=False)

    # Separate address into 'street', 'city', 'state', 'zip_code', 'phone_number'.
    streets, cities, states, zip_codes, phone_numbers = [], [], [], [], []
    for index, row in retailers.iterrows():
        parts = row.address.split(' \n')
        streets.append(parts[0])
        phone_numbers.append(parts[-1])
        locales = parts[1]
        city_locales = locales.split(', ')
        state_locales = city_locales[-1].split(' ')
        cities.append(city_locales[0])
        states.append(state_locales[0])
        zip_codes.append(state_locales[-1])
    retailers['premise_street_address'] = pd.Series(streets)
    retailers['premise_city'] = pd.Series(cities)
    retailers['premise_state'] = pd.Series(states)
    retailers['premise_zip_code'] = pd.Series(zip_codes)
    retailers['business_phone'] = pd.Series(phone_numbers)

    # Convert the issue date to ISO format.
    retailers['issue_date'] = retailers['issue_date'].apply(
        lambda x: pd.to_datetime(x).isoformat()
    )

    # Get the refreshed date.
    date = pdf.metadata['ModDate'].replace('D:', '')
    date = date[:4] + '-' + date[4:6] + '-' + date[6:8] + 'T' + date[8:10] + \
        ':' + date[10:12] + ':' + date[12:].replace("'", ':').rstrip(':')
    retailers['data_refreshed_date'] = date

    # Geocode licenses to get `premise_latitude` and `premise_longitude`.
    config = dotenv_values(env_file)
    google_maps_api_key = config['GOOGLE_MAPS_API_KEY']
    retailers['address'] = retailers['address'].str.replace('*', '', regex=False)
    retailers = geocode_addresses(
        retailers,
        api_key=google_maps_api_key,
        address_field='address',
    )
    drop_cols = ['state', 'state_name', 'address', 'formatted_address']
    retailers.drop(columns=drop_cols, inplace=True)
    gis_cols = {
        'county': 'premise_county',
        'latitude': 'premise_latitude',
        'longitude': 'premise_longitude'
    }
    retailers.rename(columns=gis_cols, inplace=True)

    # Save and return the data.
    if data_dir is not None:
        timestamp = datetime.now().isoformat()[:19].replace(':', '-')
        retailers.to_csv(f'{data_dir}/retailers-{STATE.lower()}-{timestamp}.csv', index=False)
    return retailers


# === Test ===
if __name__ == '__main__':

    # Support command line usage.
    import argparse
    try:
        arg_parser = argparse.ArgumentParser()
        arg_parser.add_argument('--d', dest='data_dir', type=str)
        arg_parser.add_argument('--data_dir', dest='data_dir', type=str)
        arg_parser.add_argument('--env', dest='env_file', type=str)
        args = arg_parser.parse_args()
    except SystemExit:
        args = {'d': DATA_DIR, 'env_file': ENV_FILE}

    # Get licenses, saving them to the specified directory.
    data_dir = args.get('d', args.get('data_dir'))
    env_file = args.get('env_file')
    data = get_licenses_il(data_dir, env_file=env_file)