"""Tests for the Dead Souls textual parser."""
from __future__ import annotations

from progetto2.deadsouls import (
    EXIT_ALIASES,
    RollingRoomParser,
    parse_exits,
    parse_room_block,
)


def test_parse_exits_brackets() -> None:
    assert parse_exits("[ Exits: n e s ]") == ["n", "e", "s"]


def test_parse_exits_plain() -> None:
    assert parse_exits("Exits: north, east") == ["n", "e"]


def test_parse_exits_dedup() -> None:
    assert parse_exits("[ Exits: n n n east east ]") == ["n", "e"]


def test_parse_exits_unknown_extra() -> None:
    # unknown ids are dropped, but the recognised ones stay
    assert parse_exits("[ Exits: n fluffy w ]") == ["n", "w"]


def test_parse_room_block_minimal() -> None:
    blk = "Outer Courtyard\n\nThe cobbles are uneven.\n[ Exits: n e ]\n"
    room = parse_room_block(blk)
    assert room is not None
    assert room.name == "Outer Courtyard"
    assert set(room.exits) == {"n", "e"}


def test_parse_room_block_no_exits() -> None:
    blk = "Dead End\n\nA wall blocks the way.\nNo exits.\n"
    room = parse_room_block(blk)
    assert room is not None
    assert room.exits == []


def test_parse_room_block_no_exits_line_returns_none() -> None:
    blk = "Plain Text\n\nNo block markers here.\n"
    assert parse_room_block(blk) is None


def test_aliases_directions() -> None:
    assert EXIT_ALIASES["northeast"] == "ne"
    assert EXIT_ALIASES["up"] == "u"
    assert EXIT_ALIASES["enter"] == "enter"


def test_rolling_parser_emits_complete_block() -> None:
    """Rooms are emitted incrementally *only* once an ``Exits:`` line closes
    the block. Across two ``feed_text`` calls, the first room completes
    on the first call (its Exits: line is observed) and the second room
    completes on the second call (its Exits: line is observed there)."""
    p = RollingRoomParser()
    rooms: list[RoomBlock] = []
    rooms.extend(p.feed_text("Outer Courtyard\n\nCobbles. \n[ Exits: n ]\n\nInn "))
    rooms.extend(p.feed_text("Hall\n\nA warm fire.\n[ Exits: s ]\n\n"))
    assert len(rooms) == 2
    assert rooms[0].name == "Outer Courtyard"
    assert rooms[1].name == "Inn Hall"