import datetime
import json
import re
import shutil

with open('web/templates/review.html', 'r') as f:
    REVIEW_TEMPLATE = f.read()


def review_id(review):
    return "_".join(re.sub('\s+', '-', x.lower() if x else '') for x in (review['company'], review['name'], review['variant']))

def review_title(review):
    return '{} "{}" {}'.format(
        review['company'], review['name'], 
        '({})'.format(review['variant']) if review['variant'] else ''
    )

def generate_website(website_source: str, json_source: str, dest: str):
    with open(website_source, 'r') as f:
        website_content = f.read()
    with open(json_source, 'r') as f:
        data = json.load(f)
    
    website = populate_template_str(website_content, {
        'index': generate_index(data['reviews']),
        'pesto_ratings': '\n\n'.join(generate_review_html(review) for review in data['reviews']),
        'current_year': str(datetime.date.today().year)
    })

    with open(dest, 'w') as f:
        f.write(website)
        f.write('<!-- auto generated on the {} -->'.format(datetime.datetime.now()))


def generate_review_html(review: dict) -> str:
    return populate_template_str(REVIEW_TEMPLATE, {
        'review_id': review_id(review)
        , 'title': review_title(review)
        , 'date': review['date']
        , 'notes': review['notes']
        , 'ingredients': ', '.join(review['ingredients'])
        , 'rating_taste': review['rating_value']['taste']
        , 'rating_consistency': review['rating_value']['consistency']
        , 'rating_ingredients': review['rating_value']['ingredients']
        , 'rating_price': review['rating_value']['price']
        , 'rating_size': review['rating_value']['size']
        , 'rating': review['final_verdict']['string']
    })

def generate_index(reviews):
    return "<ul>{}</ul>".format(
        "\n".join('<li><a href="#{}">{}</a></li>'.format(
            review_id(review), review_title(review)
        ) for review in reviews)
    )

def populate_template_str(templatestr, fields: dict[str, str]):
    def fill(match):
        return fields.get(match.group(1).lower(), 'Unknown field {}'.format(match.group(1)))

    return re.sub(r'{([A-Z_]+)}', fill, templatestr)
    
if __name__ == '__main__':
    generate_website('web/templates/index.html', 'reviews.json', 'web/index.html')
    shutil.copy('reviews.json', 'web/reviews.json')