Problem: Implement Game Metadata Lookups

You are tasked with building an in-memory system to store and query game metadata. The system should be initialized with a list of game records, each containing various attributes. Subsequently, it must support several lookup functions over this data.

Game Metadata Structure

Each game record will include the following fields:

• name (string): The title of the game.
• release_date (string): The game's release date (e.g., "YYYY-MM-DD").
• platform (list of strings): A list of platforms the game is available on.
• genre (string): The primary genre of the game.
• publisher (string): The game's publisher.
• country (string, optional): The country of origin or primary market.
• discord_servers (list of strings, optional): Relevant Discord server IDs or names.

Example Input

games = [
    {
        "name": "Cyber Quest",
        "release_date": "2025-01-01",
        "platform": ["playstation", "xbox"],
        "genre": "RPG",
        "publisher": "GameStudio A"
    },
    {
        "name": "Battle Arena",
        "release_date": "2024-11-15",
        "platform": ["pc"],
        "genre": "Action",
        "publisher": "GameStudio B"
    },
    {
        "name": "Sky Adventure",
        "release_date": "2025-02-10",
        "platform": ["playstation"],
        "genre": "Adventure",
        "publisher": "GameStudio A"
    },
    {
        "name": "Mystery World",
        "release_date": "2023-07-20",
        "platform": ["xbox", "pc"],
        "genre": "Puzzle",
        "publisher": "GameStudio C"
    },
    {
        "name": "Speed Racer",
        "release_date": "2025-03-05",
        "platform": ["pc", "playstation"],
        "genre": "Racing",
        "publisher": "GameStudio B"
    }
]

Required Functions

Implement the following Python functions:

• def get_genre(input_game: str) -> str | None:

  • Given a game name, return the genre of that game. Return None if the game is not found.

• def get_games(input_genre: str) -> list[str]:

  • Given a genre, return a list of game names associated with that genre.

• def get_most_available_games() -> list[str]:

  • Return a list of all game names that are available on the largest number of unique platforms.

• def get_available_games(number_of_platform: int) -> list[str]:

  • Return a list of all game names that are available on exactly number_of_platform unique platforms.

Requirements

• Game name and genre lookups must be case-insensitive.
• When counting platforms, only unique platforms for each game should be considered.
• If multiple games tie for the largest number of platforms in get_most_available_games, all such game names must be returned.
• All returned game names must preserve their original casing.