#!/bin/python3

import requests
import os
import pathlib
from enum import Enum
from argparse import ArgumentParser
from dotenv import load_dotenv
from tabulate import tabulate
from datetime import datetime, timedelta, timezone


class Mod:
    def __init__(self, data):
        self.id = int(data["id"])
        self.name = str(data["name"])
        self.downloads = int(data["downloadCount"])
        self.date_created = str(data["dateCreated"])
        year_created = ""
        try:
            year_created = datetime.strptime(
                data["dateCreated"], "%Y-%m-%dT%H:%M:%S.%f%z"
            ).strftime("%Y")
        except ValueError:
            year_created = datetime.strptime(
                data["dateCreated"], "%Y-%m-%dT%H:%M:%S%z"
            ).strftime("%Y")
        self.year_created = year_created
        self.date_modified = str(data["dateModified"])
        try:
            self.date_released = datetime.strptime(
                data["dateReleased"], "%Y-%m-%dT%H:%M:%S.%f%z"
            )
        except ValueError:
            self.date_released = datetime.strptime(
                data["dateReleased"], "%Y-%m-%dT%H:%M:%S%z"
            )


class FilterType(Enum):
    LastYear = "last-year"
    Downloads = "downloads"


class SortType(Enum):
    Downloads = "downloads"
    InvDownloads = "-downloads"
    ReleaseYear = "release-year"
    InvReleaseYear = "-release-year"


if __name__ == "__main__":
    load_dotenv()

    def clamp(val: int, smallest: int, largest: int) -> int:
        return max(smallest, min(val, largest))

    pathlib.Path("./out").mkdir(exist_ok=True)

    parser = ArgumentParser()
    parser.add_argument(
        "-f",
        "--filter",
        help="Filters what mods are included",
        type=FilterType,
        required=False,
        action="append",
        nargs="+",
        dest="filter",
    )
    parser.add_argument(
        "-s",
        "--sort",
        help="Sorts the mods before putting them in a table",
        type=SortType,
        required=False,
        action="append",
        nargs="+",
        dest="sort",
    )
    parser.add_argument(
        "--page-size",
        help="Entries per page",
        type=int,
        default=50,
        required=False,
        dest="page_size",
    )
    parser.add_argument(
        "--max-index",
        help="Max amount of entries fetched",
        type=int,
        default=10_000,
        required=False,
        dest="max_index",
    )
    args = parser.parse_args()

    page_size = clamp(args.page_size, 10, 50)

    # Merge all filters into 1 array regardless of the arg format
    filters = []
    if args.filter is not None:
        for filter_list in args.filter:
            for filter in filter_list:
                filters.append(filter)

    sorts = []
    if args.sort is not None:
        for sort_list in args.sort:
            for sort_logic in sort_list:
                sorts.append(sort_logic)

    def sort_mod(mod: Mod, sorts: list[SortType]):
        sorting = []
        for sort in sorts:
            if sort is SortType.Downloads:
                sorting.append(mod.downloads)
            elif sort is SortType.InvDownloads:
                sorting.append(-mod.downloads)
            elif sort is SortType.ReleaseYear:
                sorting.append(mod.year_created)
            elif sort is SortType.InvReleaseYear:
                sorting.append(-int(mod.year_created))

        return tuple(sorting)

    PAGE_SIZE = page_size
    MAX_INDEX = args.max_index
    URL = "https://api.curseforge.com/v1/mods/search"
    PARAMS = {
        "gameId": "432",  # minecraft
        "classId": 6,  # mods
        "sortField": 6,  # downloads
        "sortOrder": "desc",
        "pageSize": PAGE_SIZE,
        "index": 0,
    }
    CURSE_API_TOKEN = os.environ["CURSE_API_TOKEN"]
    HEADERS = {"x-api-key": CURSE_API_TOKEN}

    all_mods = []

    for i in range(0, MAX_INDEX, PAGE_SIZE):
        PARAMS["index"] = i
        r = requests.get(url=URL, params=PARAMS, headers=HEADERS)
        try:
            data = r.json()
        except ValueError as err:
            print(err)
            break

        data = data["data"]

        for entry in data:
            mod = Mod(entry)

            # filter mods with under 1M downloads
            if FilterType.Downloads in filters:
                if mod.downloads < 1_000_000:
                    continue

            # filter mods without a release in the past year
            if FilterType.LastYear in filters:
                past = datetime.now(timezone.utc) - timedelta(days=365)
                if mod.date_released < past:
                    continue

            all_mods.append(mod)
        print(f"{i} / {MAX_INDEX}")

    all_mods.sort(key=lambda m: sort_mod(m, sorts))

    all_mods = map(
        lambda m: [
            m.name,
            "{0:,d}".format(m.downloads),
            m.date_created,
            m.date_released,
        ],
        all_mods,
    )
    table = tabulate(
        all_mods,
        headers=["Name", "Downloads", "Created Date", "Last Release Date"],
        tablefmt="double_grid",
        showindex=True,
    )

    # Write the above table in a file for logging with today's date as the file's name
    with open("./out/mods", "w") as f:
        f.write(table)