"""Get, drop, and inventory commands for items."""

from mudlib.commands import CommandDefinition, register
from mudlib.player import Player
from mudlib.thing import Thing
from mudlib.zone import Zone


def _find_thing_at(name: str, zone: Zone, x: int, y: int) -> Thing | None:
    """Find a thing on the ground matching name or alias."""
    name_lower = name.lower()
    for obj in zone.contents_at(x, y):
        if not isinstance(obj, Thing):
            continue
        if obj.name.lower() == name_lower:
            return obj
        if name_lower in (a.lower() for a in obj.aliases):
            return obj
    return None


def _find_thing_in_inventory(name: str, player: Player) -> Thing | None:
    """Find a thing in the player's inventory matching name or alias."""
    name_lower = name.lower()
    for obj in player.contents:
        if not isinstance(obj, Thing):
            continue
        if obj.name.lower() == name_lower:
            return obj
        if name_lower in (a.lower() for a in obj.aliases):
            return obj
    return None


async def cmd_get(player: Player, args: str) -> None:
    """Pick up an item from the ground."""
    if not args.strip():
        await player.send("Get what?\r\n")
        return

    zone = player.location
    if zone is None or not isinstance(zone, Zone):
        await player.send("You are nowhere.\r\n")
        return

    thing = _find_thing_at(args.strip(), zone, player.x, player.y)
    if thing is None:
        await player.send(f"You don't see '{args.strip()}' here.\r\n")
        return

    if not player.can_accept(thing):
        await player.send("You can't pick that up.\r\n")
        return

    thing.move_to(player)
    await player.send(f"You pick up {thing.name}.\r\n")


async def cmd_drop(player: Player, args: str) -> None:
    """Drop an item from inventory onto the ground."""
    if not args.strip():
        await player.send("Drop what?\r\n")
        return

    zone = player.location
    if zone is None or not isinstance(zone, Zone):
        await player.send("You can't drop things here.\r\n")
        return

    thing = _find_thing_in_inventory(args.strip(), player)
    if thing is None:
        await player.send(f"You're not carrying '{args.strip()}'.\r\n")
        return

    thing.move_to(zone, x=player.x, y=player.y)
    await player.send(f"You drop {thing.name}.\r\n")


async def cmd_inventory(player: Player, args: str) -> None:
    """List items in the player's inventory."""
    things = [obj for obj in player.contents if isinstance(obj, Thing)]

    if not things:
        await player.send("You aren't carrying anything.\r\n")
        return

    lines = ["You are carrying:\r\n"]
    for thing in things:
        lines.append(f"  {thing.name}\r\n")

    await player.send("".join(lines))


register(CommandDefinition("get", cmd_get, aliases=["take", "pick"]))
register(CommandDefinition("drop", cmd_drop))
register(CommandDefinition("inventory", cmd_inventory, aliases=["i"]))