"""This module contains functions for recognizing servers associated with different player IDs."""

from typing import Optional, Mapping, Sequence
from simnet.utils.enum_ import Game, Region

UID_RANGE: Mapping[Game, Mapping[Region, Sequence[int]]] = {
    Game.GENSHIN: {
        Region.OVERSEAS: (6, 7, 8, 9),
        Region.CHINESE: (1, 2, 5),
    },
    Game.STARRAIL: {
        Region.OVERSEAS: (6, 7, 8, 9),
        Region.CHINESE: (1, 2),
    },
    Game.HONKAI: {
        Region.OVERSEAS: (1, 2),
        Region.CHINESE: (3, 4),
    },
}


def recognize_genshin_server(player_id: int) -> str:
    """Recognize which server a Genshin UID is from.

    Args:
        player_id (int): The player ID to recognize the server for.

    Returns:
        str: The name of the server associated with the given player ID.

    Raises:
        ValueError: If the player ID is not associated with any server.
    """
    server = {
        "1": "cn_gf01",
        "2": "cn_gf01",
        "5": "cn_qd01",
        "6": "os_usa",
        "7": "os_euro",
        "8": "os_asia",
        "9": "os_cht",
    }.get(str(player_id)[0])

    if server:
        return server

    raise ValueError(f"Player id {player_id} isn't associated with any server")


def recognize_starrail_server(player_id: int) -> str:
    """Recognize which server a StarRail UID is from.

    Args:
        player_id (int): The player ID to recognize the server for.

    Returns:
        str: The name of the server associated with the given player ID.

    Raises:
        ValueError: If the player ID is not associated with any server.
    """
    server = {
        "1": "prod_gf_cn",
        "2": "prod_gf_cn",
        "5": "",
        "6": "",
        "7": "",
        "8": "",
        "9": "",
    }.get(str(player_id)[0])

    if server:
        return server

    raise ValueError(f"player id {player_id} isn't associated with any server")


def recognize_region(player_id: int, game: Game) -> Optional[Region]:
    """
    Recognizes the region of a player ID for a given game.

    Args:
        player_id (int): The player ID to recognize the region for.
        game (Game): The game the player ID belongs to.

    Returns:
        Optional[Region]: The region the player ID belongs to if it can be recognized, None otherwise.
    """
    first = int(str(player_id)[0])

    for region, digits in UID_RANGE[game].items():
        if first in digits:
            return region

    return None


def recognize_server(player_id: int, game: Game) -> str:
    """
    Recognizes the server of a player ID for a given game.

    Args:
        player_id (int): The player ID to recognize the server for.
        game (Game): The game the player ID belongs to.

    Returns:
        str: The server the player ID belongs to.

    Raises:
        ValueError: If the specified game is not supported.
    """
    if game == Game.GENSHIN:
        return recognize_genshin_server(player_id)
    if game == Game.STARRAIL:
        return recognize_starrail_server(player_id)
    raise ValueError(f"{game} is not a valid game")