"""Unit tests for participant utility functions."""

from datetime import UTC, datetime

from src.utils.participant import (
    can_update_profile,
    can_withdraw,
    get_active_participants,
    is_withdrawn,
)


def test_get_active_participants_excludes_withdrawn(
    exchange_factory, participant_factory
):
    """Test that get_active_participants excludes withdrawn participants."""
    exchange = exchange_factory()

    # Create 2 active, 1 withdrawn
    active1 = participant_factory(exchange=exchange, name="Alice")
    active2 = participant_factory(exchange=exchange, name="Bob")
    withdrawn = participant_factory(
        exchange=exchange, name="Charlie", withdrawn_at=datetime.now(UTC)
    )

    participants = get_active_participants(exchange.id)

    assert len(participants) == 2
    assert active1 in participants
    assert active2 in participants
    assert withdrawn not in participants


def test_get_active_participants_ordered_by_name(exchange_factory, participant_factory):
    """Test that participants are ordered alphabetically."""
    exchange = exchange_factory()

    participant_factory(exchange=exchange, name="Zoe")
    participant_factory(exchange=exchange, name="Alice")
    participant_factory(exchange=exchange, name="Bob")

    participants = get_active_participants(exchange.id)

    assert len(participants) == 3
    assert participants[0].name == "Alice"
    assert participants[1].name == "Bob"
    assert participants[2].name == "Zoe"


def test_get_active_participants_empty_when_all_withdrawn(
    exchange_factory, participant_factory
):
    """Test that empty list returned when all participants withdrawn."""
    exchange = exchange_factory()

    participant_factory(exchange=exchange, withdrawn_at=datetime.now(UTC))
    participant_factory(exchange=exchange, withdrawn_at=datetime.now(UTC))

    participants = get_active_participants(exchange.id)

    assert len(participants) == 0


def test_get_active_participants_different_exchanges(
    exchange_factory, participant_factory
):
    """Test that participants are filtered by exchange_id."""
    exchange1 = exchange_factory()
    exchange2 = exchange_factory()

    participant_factory(exchange=exchange1, name="Alice")
    participant_factory(exchange=exchange2, name="Bob")

    participants = get_active_participants(exchange1.id)

    assert len(participants) == 1
    assert participants[0].name == "Alice"


def test_is_withdrawn_true(participant_factory):
    """Test is_withdrawn returns True for withdrawn participant."""
    participant = participant_factory(withdrawn_at=datetime.now(UTC))
    assert is_withdrawn(participant) is True


def test_is_withdrawn_false(participant_factory):
    """Test is_withdrawn returns False for active participant."""
    participant = participant_factory()
    assert is_withdrawn(participant) is False


def test_can_update_profile_draft_state(participant_factory, exchange_factory):
    """Profile updates allowed in draft state."""
    exchange = exchange_factory(state="draft")
    participant = participant_factory(exchange=exchange)
    assert can_update_profile(participant) is True


def test_can_update_profile_registration_open(participant_factory, exchange_factory):
    """Profile updates allowed when registration open."""
    exchange = exchange_factory(state="registration_open")
    participant = participant_factory(exchange=exchange)
    assert can_update_profile(participant) is True


def test_can_update_profile_registration_closed(participant_factory, exchange_factory):
    """Profile updates allowed when registration closed."""
    exchange = exchange_factory(state="registration_closed")
    participant = participant_factory(exchange=exchange)
    assert can_update_profile(participant) is True


def test_can_update_profile_matched_state(participant_factory, exchange_factory):
    """Profile updates blocked after matching."""
    exchange = exchange_factory(state="matched")
    participant = participant_factory(exchange=exchange)
    assert can_update_profile(participant) is False


def test_can_update_profile_completed_state(participant_factory, exchange_factory):
    """Profile updates blocked when completed."""
    exchange = exchange_factory(state="completed")
    participant = participant_factory(exchange=exchange)
    assert can_update_profile(participant) is False


def test_can_withdraw_draft_state(participant_factory, exchange_factory):
    """Withdrawal allowed in draft state."""
    exchange = exchange_factory(state="draft")
    participant = participant_factory(exchange=exchange)
    assert can_withdraw(participant) is True


def test_can_withdraw_registration_open(participant_factory, exchange_factory):
    """Withdrawal allowed when registration open."""
    exchange = exchange_factory(state="registration_open")
    participant = participant_factory(exchange=exchange)
    assert can_withdraw(participant) is True


def test_can_withdraw_registration_closed(participant_factory, exchange_factory):
    """Withdrawal blocked when registration closed."""
    exchange = exchange_factory(state="registration_closed")
    participant = participant_factory(exchange=exchange)
    assert can_withdraw(participant) is False


def test_can_withdraw_matched_state(participant_factory, exchange_factory):
    """Withdrawal blocked after matching."""
    exchange = exchange_factory(state="matched")
    participant = participant_factory(exchange=exchange)
    assert can_withdraw(participant) is False


def test_can_withdraw_already_withdrawn(participant_factory):
    """Withdrawal blocked if already withdrawn."""
    participant = participant_factory(withdrawn_at=datetime.now(UTC))
    assert can_withdraw(participant) is False