# Script to add a new item to the log

from datetime import datetime
from dotenv import load_dotenv
import json
import logging
import os
import re
import requests
from urllib.request import urlopen

logging.basicConfig(filename='./logs/run.log', encoding='utf-8', level=logging.DEBUG)

load_dotenv()

TMDB_API_KEY = os.getenv('TMDB_API_KEY')
TVDB_API_KEY = os.getenv('TVDB_API_KEY')

if "" == TMDB_API_KEY: logging.error("TMDB API key not found")
if "" == TVDB_API_KEY: logging.error("TVDB API key not found")


def add_item_to_log(item_id, media_type, log):
    """Add a film, book, TV series or TV episode to a log"""
    logging.info(f"Processing {item_id}…")

    item = import_by_id(item_id, media_type)

    if log in ['log', 'current']:

        # TODO - review this when moving from one log to another
        if media_type in ['books', 'tv-series', 'games']:
            date_started = ''
            while re.search('[0-9]{4}-[0-9]{2}-[0-9]{2}', date_started) is None:
                date_started = input("Enter date started [YYYY-MM-DD, t for today]: ")
                if 't' == date_started: date_started = datetime.today().strftime('%Y-%m-%d')
            item['date_started'] = date_started

        if 'log' == log:
            date_finished = ''
            while re.search('[0-9]{4}-[0-9]{2}-[0-9]{2}', date_finished) is None:
                date_finished = input("Enter date finished [YYYY-MM-DD, t for today]: ")
                if 't' == date_finished: date_finished = datetime.today().strftime('%Y-%m-%d')
            item['date_finished'] = date_finished

        # TODO - do this automatically
        is_repeat = ''
        while is_repeat not in ['y', 'n']:
            is_repeat = input(f"Is this a repeat entry? [y/n]: ")
            if 'y' == is_repeat: item['is_repeat'] = True
        item['added_by_id'] = item_id

    comments = input("Enter comments (optional): ")
    if '' != comments: item['comments'] = comments

    # Validation step
    correct = ''
    print(f"{media_type} data to add:\n")
    print(json.dumps(item, indent=4))
    if 'y' != input("\nDoes this look correct? [y]: "): return

    # Save changes
    logging.info(f"Adding {media_type} to {log}…")

    with open(f"./data/{media_type}/{log}.json", "r") as log_file:
        log_items = json.load(log_file)

    log_items.insert(0, item)

    with open(f"./data/{media_type}/{log}.json", "w") as log_file:
       json.dump(log_items, log_file, indent=4)

    logging.info(f"Added {media_type} {item_id} to {log}")


def import_by_id(import_id, media_type):
    if media_type in ['films', 'tv-series']:
        return import_from_imdb_by_id(import_id, media_type)

    elif media_type in ['tv-episodes']:
        return #import_from_tvdb_by_id(import_id, media_type)

    elif media_type in ['books']:
        return import_from_openlibrary_by_id(import_id, media_type)


def import_from_imdb_by_id(imdb_id, media_type):
    """Retrieve a film, TV show or TV episode from TMDB using an IMDB ID"""

    api_url = f"https://api.themoviedb.org/3/find/{imdb_id}"

    # Sending API request
    response = requests.get(
        api_url,
        params={
            'external_source': 'imdb_id'
        },
        headers={'Authorization': f"Bearer {TMDB_API_KEY}"}
    )

    # Process the response
    if (200 == response.status_code):
        logging.info(response.status_code)

    elif (429 == response.status_code):
        time.sleep(2)
        import_from_imdb_by_id(imdb_id, media_type)
        return

    else:
        raise Exception(f"Error {response.status_code}: {response.text}")

    if ('films' == media_type): results_key = 'movie_results'
    elif ('tv-episodes' == media_type): results_key = 'TODO'
    elif ('tv-series' == media_type): results_key = 'tv_results'

    response_data = json.loads(response.text)[results_key]

    if 1 == len(response_data):
        item = response_data[0]

    elif 0 == len(response_data):
        raise Exception(f"Returned no results for {imdb_id}")

    elif 1 < len(response_data):
        logging.warning(f"Returned more than one {media_type} for ID '{imdb_id}'")
        print(f"Returned more than one {media_type} for ID '{imdb_id}':\n")
        print(json.dumps(response_data, indent=4))
        idx = input("\nEnter the index of the result to use: ")
        try:
            item = response_data[int(idx)]

        except:
            raise Exception(f"Index {idx} is invalid")

    # Modify the returned result to add additional data
    return cleanup_result(item, media_type)


def import_from_openlibrary_by_id(isbn, media_type):
    """Retrieve a film, TV show or TV episode from TMDB using an IMDB ID"""

    api_url = f"https://openlibrary.org/isbn/{isbn}"

    # Sending API request
    response = requests.get(
        api_url,
        headers={'accept': 'application/json'}
    )

    # Process the response
    if (200 == response.status_code):
        logging.info(response.status_code)

    elif (429 == response.status_code):
        time.sleep(2)
        import_from_openlibrary_by_id(isbn, media_type)
        return

    else:
        raise Exception(f"Error {reponse.status_code}: {response.text}")

    item = json.loads(response.text)

    for key in ['authors', 'works']:
        if key in item:
            for i, sub_item in enumerate(item[key]):
                item[key][i] = import_from_openlibrary_by_ol_key(sub_item['key'])

    if 'works' in item:
        if len(item['works']) > 1:
            raise Exception(f"Multiple works found for {isbn}")

        else:
            item['work'] = item['works'][0]
            del item['works']

    # Modify the returned result to add additional data
    return cleanup_result(item, media_type)


def import_from_openlibrary_by_ol_key(key):
    """Retrieves an item (author or work) from OpenLibrary using an OL key"""

    _, mode, ol_id = key.split('/')

    if mode in ['works', 'authors']:
        api_url = f"https://openlibrary.org{key}"

        # Sending API request
        response = requests.get(
            api_url,
            headers={'accept': 'application/json'}
        )

        # Process the response
        if (200 == response.status_code):
            logging.info(response.status_code)

        elif (429 == response.status_code):
            time.sleep(2)
            import_from_openlibrary_by_ol_key(key)
            return

        else:
            raise Exception(f"Error {reponse.status_code}: {response.text}")

        item = json.loads(response.text)

        if 'authors' == mode:
            author = {
                'id': ol_id,
                'name': item['name']
            }

            if 'personal_name' in item:
                if item['name'] != item['personal_name']: author['personal_name'] = item['personal_name']

            return author

        elif 'works' == mode:
            work = {
                'id': ol_id,
                'title': item['title']
            }

            for key in ['first_publish_date', 'subjects']:
                if key in item: work[key] = item[key]

            return work

    else:
        raise Exception(f"Unknown OpenLibrary key '{mode}'")


def cleanup_result(item, media_type):
    """Process a film, TV series, TV episode or book returned by their respecitve APIs by removing unnecessary fields and adding others"""

    for field_name in [
        'adult', # TMDB
        'backdrop_path', # TMDB
        'copyright_date', # OpenLibrary
        'classifications', # OpenLibrary
        'created', # OpenLibrary
        'episode_type', # TMDB
        'first_sentence', # OpenLibrary
        'genre_ids', # TMDB
        'identifiers', # OpenLibrary
        'media_type', # TMDB
        'last_modified', # OpenLibrary
        'latest_revision', # OpenLibrary
        'lc_classifications', # OpenLibrary
        'local_id', # OpenLibrary
        'ocaid', # OpenLibrary
        'popularity', # TMDB
        'production_code', # TMDB
        'revision', # OpenLibrary
        'runtime', # TMDB
        'source_records', # OpenLibrary
        'still_path', # TMDB
        'type', # OpenLibrary
        'video', # TMDB
        'vote_average', # TMDB
        'vote_count' # TMDB
    ]:
        if field_name in item: del item[field_name]

    if media_type in ['films', 'tv-series']:
        title_key = 'name' if 'tv-series' == media_type else 'title'

        if f"original_{title_key}" in item and 'original_language' in item:
            if item[f"original_{title_key}"] == item[title_key] and item['original_language'] == 'en':
                del item[f"original_{title_key}"], item['original_language']

    if 'books' == media_type:
        _, _, item['id'] = item['key'].split('/')
        del item['key']

        for key in ['isbn_10', 'isbn_13']:
            if key in item:
                if len(item[key]) > 1:
                    raise Exception("Multiple ISBN results")

                else:
                    item[key] = item[key][0]

        if 'publish_places' in item:
            if len(item['publish_places']) > 1:
                raise Exception("Multiple publish_places")

            else:
                item['published_in'] = item['publish_places'][0]
                del item['publish_places']

        if 'languages' in item:
            item['languages'] = [lang['key'].split('/')[2] for lang in item['languages']]

        if 'translation_of' in item:
            if item['translation_of'] == item['work']['title']:
                del item['translation_of']
            else:
                raise Exception(f"translation_of '{item['translation_of']}' is different to work title '{item['work']['title']}'")

        if 'translated_from' in item:
            if len(item['translated_from']) > 1:
                raise Exception("Multiple translated_from results")

            else:
                item['work']['original_language'] = item['translated_from'][0]['key'].split('/')[2]
                del item['translated_from']


    if 'date_added' not in item: item['date_added'] = datetime.today().strftime('%Y-%m-%d')

    return item


def main():
    media_type = ''
    while media_type not in ['films', 'tv-episodes', 'tv-series', 'books']:
        media_type = input("Select media type [films|tv-episodes|tv-series|books]: ")

        try:
            if 'films' == media_type:
                log = ''
                while log not in ['log', 'wishlist']:
                    log = input ("Enter log to update [log|wishlist]: ")

                imdb_id = ''
                while re.search("tt[0-9]+", imdb_id) is None:
                    imdb_id = input("Enter IMDB ID: ")

                add_item_to_log(imdb_id, media_type, log)

            elif 'books' == media_type:
                log = ''
                while log not in ['log', 'current', 'wishlist']:
                    log = input ("Enter log to update [log|current|wishlist]: ")

                isbn = ''
                while re.search("[0-9]+", isbn) is None:
                    isbn = input("Enter ISBN: ")

                add_item_to_log(isbn, media_type, log)

            elif 'tv-episodes' == media_type:
                imdb_id = ''
                while re.search("tt[0-9]+", imdb_id) is None:
                    imdb_id = input("Enter IMDB ID: ")

                add_item_to_log(imdb_id, media_type, 'log')

            elif 'tv-series' == media_type:
                log = ''
                while log not in ['log', 'current', 'wishlist']:
                    log = input ("Enter log to update [log|current|wishlist]: ")

                imdb_id = ''
                while re.search("tt[0-9]+", imdb_id) is None:
                    imdb_id = input("Enter IMDB ID: ")

                add_item_to_log(imdb_id, media_type, log)

        except Exception as error:
            logging.error(repr(error))
            print(error)


if __name__ == "__main__":
    main()