"""Play interactive fiction games."""

import pathlib

from mudlib.commands import CommandDefinition, register
from mudlib.if_session import IFSession
from mudlib.player import Player

# Story files directory
_stories_dir = pathlib.Path(__file__).resolve().parents[3] / "content" / "stories"

# Map of game name -> file extension for lookup
_STORY_EXTENSIONS = (".z3", ".z5", ".z8", ".zblorb")


def _find_story(name: str) -> pathlib.Path | None:
    """Find a story file by name in content/stories/."""
    for ext in _STORY_EXTENSIONS:
        path = _stories_dir / f"{name}{ext}"
        if path.exists():
            return path
    return None


async def cmd_play(player: Player, args: str) -> None:
    """Start playing an interactive fiction game."""
    game_name = args.strip().lower()
    if not game_name:
        await player.send("play what? (try: play zork1)\r\n")
        return

    story_path = _find_story(game_name)
    if not story_path:
        await player.send(f"no story found for '{game_name}'.\r\n")
        return

    # Create and start IF session
    session = IFSession(player, str(story_path), game_name)
    try:
        intro = await session.start()
    except FileNotFoundError:
        await player.send("error: dfrotz not found. cannot play IF games.\r\n")
        return
    except OSError as e:
        await player.send(f"error starting game: {e}\r\n")
        return

    player.if_session = session
    player.mode_stack.append("if")

    if intro:
        await player.send(intro + "\r\n")


register(
    CommandDefinition(
        "play", cmd_play, mode="normal", help="play an interactive fiction game"
    )
)