"""
Tests for services/matrix-bridge-dagi/app/room_mapping.py
"""

import sys
from pathlib import Path

import pytest

_BRIDGE = Path(__file__).parent.parent / "services" / "matrix-bridge-dagi"
if str(_BRIDGE) not in sys.path:
    sys.path.insert(0, str(_BRIDGE))

from app.room_mapping import RoomMappingConfig, parse_room_map, RoomMapping  # noqa: E402

ALLOWED = frozenset({"sofiia", "druid"})
ROOM1 = "!QwHczWXgefDHBEVkTH:daarion.space"
ROOM2 = "!AnotherRoom123:daarion.space"


# ── Parsing — valid ────────────────────────────────────────────────────────────

def test_parse_single_mapping():
    cfg = parse_room_map(f"sofiia:{ROOM1}", ALLOWED)
    assert cfg.total_mappings == 1
    assert cfg.mappings[0].agent_id == "sofiia"
    assert cfg.mappings[0].room_id == ROOM1


def test_parse_multiple_mappings():
    raw = f"sofiia:{ROOM1},druid:{ROOM2}"
    cfg = parse_room_map(raw, ALLOWED)
    assert cfg.total_mappings == 2


def test_parse_empty_string():
    cfg = parse_room_map("", ALLOWED)
    assert cfg.total_mappings == 0


def test_parse_whitespace_only():
    cfg = parse_room_map("   ", ALLOWED)
    assert cfg.total_mappings == 0


def test_parse_trailing_comma():
    cfg = parse_room_map(f"sofiia:{ROOM1},", ALLOWED)
    assert cfg.total_mappings == 1


def test_parse_spaces_around_entries():
    cfg = parse_room_map(f"  sofiia:{ROOM1}  ,  druid:{ROOM2}  ", ALLOWED)
    assert cfg.total_mappings == 2


# ── Parsing — invalid ─────────────────────────────────────────────────────────

def test_parse_missing_colon_raises():
    with pytest.raises(ValueError, match="parse errors"):
        parse_room_map("sofiia_no_colon", ALLOWED)


def test_parse_invalid_room_id_format_raises():
    with pytest.raises(ValueError, match="invalid room_id format"):
        # Room ID must start with !
        parse_room_map(f"sofiia:#badroom:server", ALLOWED)


def test_parse_absolute_path_as_room_raises():
    with pytest.raises(ValueError, match="invalid room_id format"):
        parse_room_map("sofiia:/etc/passwd", ALLOWED)


def test_parse_empty_agent_id_raises():
    with pytest.raises(ValueError, match="parse errors"):
        parse_room_map(f":{ROOM1}", ALLOWED)


def test_parse_empty_room_id_raises():
    with pytest.raises(ValueError, match="parse errors"):
        parse_room_map("sofiia:", ALLOWED)


# ── agent_for_room ────────────────────────────────────────────────────────────

def test_agent_for_room_found():
    cfg = parse_room_map(f"sofiia:{ROOM1}", ALLOWED)
    assert cfg.agent_for_room(ROOM1) == "sofiia"


def test_agent_for_room_not_found():
    cfg = parse_room_map(f"sofiia:{ROOM1}", ALLOWED)
    assert cfg.agent_for_room("!unknownroom:server") is None


def test_agent_for_room_not_allowed():
    """Agent in mapping but not in allowed_agents → None."""
    cfg = parse_room_map(f"druid:{ROOM1}", frozenset({"sofiia"}))  # druid not allowed
    # mapping is accepted but agent_for_room returns None
    assert cfg.agent_for_room(ROOM1) is None


def test_agent_for_room_allowed_when_in_set():
    cfg = parse_room_map(f"druid:{ROOM1}", frozenset({"druid"}))
    assert cfg.agent_for_room(ROOM1) == "druid"


# ── rooms_for_agent ───────────────────────────────────────────────────────────

def test_rooms_for_agent_single():
    cfg = parse_room_map(f"sofiia:{ROOM1}", ALLOWED)
    assert cfg.rooms_for_agent("sofiia") == [ROOM1]


def test_rooms_for_agent_multiple():
    cfg = parse_room_map(f"sofiia:{ROOM1},sofiia:{ROOM2}", ALLOWED)
    rooms = cfg.rooms_for_agent("sofiia")
    assert ROOM1 in rooms
    assert ROOM2 in rooms


def test_rooms_for_agent_unknown():
    cfg = parse_room_map(f"sofiia:{ROOM1}", ALLOWED)
    assert cfg.rooms_for_agent("nonexistent") == []


# ── as_summary ────────────────────────────────────────────────────────────────

def test_summary_contains_expected_fields():
    cfg = parse_room_map(f"sofiia:{ROOM1}", ALLOWED)
    summary = cfg.as_summary()
    assert len(summary) == 1
    entry = summary[0]
    assert entry["room_id"] == ROOM1
    assert entry["agent_id"] == "sofiia"
    assert entry["allowed"] is True


def test_summary_allowed_false_for_unknown_agent():
    cfg = parse_room_map(f"druid:{ROOM1}", frozenset({"sofiia"}))
    summary = cfg.as_summary()
    assert summary[0]["allowed"] is False


def test_summary_no_tokens_in_output():
    """Access tokens must never appear in summary."""
    cfg = parse_room_map(f"sofiia:{ROOM1}", ALLOWED)
    summary = cfg.as_summary()
    for entry in summary:
        assert "token" not in str(entry).lower()
        assert "secret" not in str(entry).lower()


# ── M2.0: N rooms, duplicate validation, multi-room lookup ────────────────────

ROOM3 = "!ThirdRoom456:daarion.space"
ROOM4 = "!FourthRoom789:daarion.space"
ROOM5 = "!FifthRoom000:daarion.space"
ALLOWED_MULTI = frozenset({"sofiia", "druid", "helion", "nutra", "alateya"})


def test_parse_five_rooms():
    """N rooms (up to 5) should all parse correctly."""
    raw = (
        f"sofiia:{ROOM1},druid:{ROOM2},helion:{ROOM3},"
        f"nutra:{ROOM4},alateya:{ROOM5}"
    )
    cfg = parse_room_map(raw, ALLOWED_MULTI)
    assert cfg.total_mappings == 5
    assert cfg.agent_for_room(ROOM1) == "sofiia"
    assert cfg.agent_for_room(ROOM2) == "druid"
    assert cfg.agent_for_room(ROOM3) == "helion"
    assert cfg.agent_for_room(ROOM4) == "nutra"
    assert cfg.agent_for_room(ROOM5) == "alateya"


def test_duplicate_room_id_raises():
    """Same room_id bound to two agents must raise ValueError (M2.0 fail-fast)."""
    raw = f"sofiia:{ROOM1},druid:{ROOM1}"
    with pytest.raises(ValueError, match="Duplicate room_id"):
        parse_room_map(raw, ALLOWED_MULTI)


def test_duplicate_room_id_same_agent_raises():
    """Even same agent repeated for same room must raise — 1 room = 1 agent."""
    raw = f"sofiia:{ROOM1},sofiia:{ROOM1}"
    with pytest.raises(ValueError, match="Duplicate room_id"):
        parse_room_map(raw, ALLOWED_MULTI)


def test_multi_room_o1_lookup():
    """agent_for_room must return correct agent for each of N rooms (O(1) index)."""
    raw = f"sofiia:{ROOM1},druid:{ROOM2},helion:{ROOM3}"
    cfg = parse_room_map(raw, ALLOWED_MULTI)
    assert cfg.agent_for_room(ROOM1) == "sofiia"
    assert cfg.agent_for_room(ROOM2) == "druid"
    assert cfg.agent_for_room(ROOM3) == "helion"
    assert cfg.agent_for_room("!unknown:server") is None


def test_rooms_for_agent_multi_room():
    """rooms_for_agent returns all rooms bound to a given agent."""
    raw = f"sofiia:{ROOM1},sofiia:{ROOM2},druid:{ROOM3}"
    allowed = frozenset({"sofiia", "druid"})
    cfg = parse_room_map(raw, allowed)
    sofiia_rooms = cfg.rooms_for_agent("sofiia")
    assert set(sofiia_rooms) == {ROOM1, ROOM2}
    assert cfg.rooms_for_agent("druid") == [ROOM3]


def test_multi_room_summary_count():
    """as_summary() must return one entry per mapping."""
    raw = f"sofiia:{ROOM1},druid:{ROOM2},helion:{ROOM3}"
    cfg = parse_room_map(raw, ALLOWED_MULTI)
    summary = cfg.as_summary()
    assert len(summary) == 3
    room_ids = {s["room_id"] for s in summary}
    assert room_ids == {ROOM1, ROOM2, ROOM3}


def test_multi_room_unknown_agent_filtered():
    """agent_for_room returns None if agent not in allowed_agents (even if mapping exists)."""
    raw = f"sofiia:{ROOM1},unknown_bot:{ROOM2}"
    allowed = frozenset({"sofiia"})  # unknown_bot not allowed
    cfg = parse_room_map(raw, allowed)
    assert cfg.agent_for_room(ROOM1) == "sofiia"
    assert cfg.agent_for_room(ROOM2) is None   # not in allowed_agents