"""
Add a new item to a media catalogue, using various APIs.
"""

import json
import logging
import os
import re
import time
from datetime import datetime
import requests
from dotenv import load_dotenv


def setup_logger(name="add_item"):
    """Set up the logger for console and file"""

    logging.root.setLevel(logging.NOTSET)

    logr = logging.getLogger(name)

    c_handler = logging.StreamHandler()
    f_handler = logging.FileHandler("./logs/run.log")

    c_handler.setLevel(logging.INFO)
    f_handler.setLevel(logging.ERROR)

    c_format = logging.Formatter("%(name)s - %(levelname)s - %(message)s")
    f_format = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")

    c_handler.setFormatter(c_format)
    f_handler.setFormatter(f_format)

    logr.addHandler(c_handler)
    logr.addHandler(f_handler)

    return logr


logger = setup_logger()

load_dotenv()

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

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


def add_item_to_log(item_id, media_type, log) -> None:
    """Add a film, book, TV series or TV episode to a log"""

    logger.info(f"Processing {item_id}…")

    item: dict = 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("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
    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
    logger.info(f"Adding {media_type} to {log}…")

    with open(f"./data/{media_type}/{log}.json", "r", encoding='utf-8') as log_file:
        log_items = json.load(log_file)

    log_items.insert(0, item)

    with open(f"./data/{media_type}/{log}.json", "w", encoding='utf-8') as log_file:
        json.dump(log_items, log_file, indent=4)

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


def import_by_id(import_id, media_type) -> dict:
    """Import from the appropriate API by unique ID"""

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

    if media_type in ["tv-episodes"]:
        return #import_from_tvdb_by_id(import_id, media_type)

    if media_type in ["books"]:
        return import_from_openlibrary_by_id(import_id, media_type)


def import_from_imdb_by_id(imdb_id, media_type) -> dict:
    """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}"},
        timeout=15
    )

    # Process the response
    if 200 == response.status_code:
        logger.debug(response.status_code)

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

    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):
        logger.warning(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 Exception as exc:
            raise Exception(f"Index {idx} is invalid") from exc

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


def import_from_openlibrary_by_id(isbn, media_type) -> dict:
    """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"}, timeout=15)

    # Process the response
    if 200 == response.status_code:
        logger.debug(response.status_code)

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

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

        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) -> dict:
    """Retrieves an item (author or work, NOT edition) 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"}, timeout=15)

        # Process the response
        if 200 == response.status_code:
            logger.debug(response.status_code)

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

        else:
            raise Exception(f"Error {response.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

        if "works" == mode:
            work = {"id": ol_id, "title": item["title"]}

            for result_key in ["first_publish_date", "subjects"]:
                if result_key in item:
                    work[result_key] = item[result_key]

            return work

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


def cleanup_result(item, media_type) -> dict:
    """Process a film, TV series, TV episode or book returned by their
    respective 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
        "oclc_numbers",  # 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")

                item[key] = item[key][0]

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

            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")

            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() -> None:
    """Prompt user to select media type and log to process"""

    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:
            logger.exception("Exception occurred")


if __name__ == "__main__":
    main()