"""Tests for slack-bot _handle_swap — now creates a pending swap + DMs the target
instead of reassigning immediately."""

from freezegun import freeze_time

MON = "2026-06-01 12:00:00"


def _setup(seed):
    seed.roster("114", "Alice", slack_user_id="U_ALICE")
    seed.roster("115", "Bob", slack_user_id="U_BOB")
    seed.weekly("Monday", "114", "Alice")  # Alice is on the Monday shift


@freeze_time(MON)
def test_request_creates_pending_and_dms_target(
    slackbot_app, schedule, seed, respond, client, routing_spy, text_of
):
    _setup(seed)
    slackbot_app._handle_swap(
        respond, schedule, "U_ALICE", "swap today <@U_BOB>", "C1", client, "C_TEST"
    )

    swap = schedule.get_swap("2026-06-01")
    assert swap["status"] == "pending" and swap["target_ext"] == "115"
    # Not applied yet — the shift still belongs to Alice.
    assert schedule.get_override("2026-06-01") is None
    routing_spy.assert_not_called()
    # DM'd the target, told the requester.
    assert client.chat_postMessage.call_args.kwargs["channel"] == "U_BOB"
    assert "Swap request sent" in text_of(respond)


@freeze_time(MON)
def test_request_by_extension(
    slackbot_app, schedule, seed, respond, client, routing_spy
):
    _setup(seed)
    slackbot_app._handle_swap(
        respond, schedule, "U_ALICE", "swap today 115", "C1", client, "C_TEST"
    )
    assert schedule.get_swap("2026-06-01")["target_ext"] == "115"


@freeze_time(MON)
def test_later_request_supersedes(slackbot_app, schedule, seed, respond, client):
    _setup(seed)
    seed.roster("116", "Carol", slack_user_id="U_CAROL")
    slackbot_app._handle_swap(
        respond, schedule, "U_ALICE", "swap today <@U_BOB>", "C1", client, "C_TEST"
    )
    slackbot_app._handle_swap(
        respond, schedule, "U_ALICE", "swap today <@U_CAROL>", "C1", client, "C_TEST"
    )
    assert schedule.get_swap("2026-06-01")["target_ext"] == "116"


@freeze_time(MON)
def test_target_not_linked_to_slack(
    slackbot_app, schedule, seed, respond, client, text_of
):
    seed.roster("114", "Alice", slack_user_id="U_ALICE")
    seed.roster("115", "Bob")  # registered but never linked Slack
    seed.weekly("Monday", "114", "Alice")
    slackbot_app._handle_swap(
        respond, schedule, "U_ALICE", "swap today 115", "C1", client, "C_TEST"
    )
    assert "isn't linked to Slack" in text_of(respond)
    assert schedule.get_swap("2026-06-01") is None


@freeze_time(MON)
def test_swap_to_self_rejected(slackbot_app, schedule, seed, respond, client, text_of):
    _setup(seed)
    slackbot_app._handle_swap(
        respond, schedule, "U_ALICE", "swap today 114", "C1", client, "C_TEST"
    )
    assert "already yours" in text_of(respond).lower()


@freeze_time(MON)
def test_not_your_shift(slackbot_app, schedule, seed, respond, client, text_of):
    seed.roster("114", "Alice", slack_user_id="U_ALICE")
    seed.roster("115", "Bob", slack_user_id="U_BOB")
    seed.weekly("Monday", "115", "Bob")  # Bob's shift, not Alice's
    slackbot_app._handle_swap(
        respond, schedule, "U_ALICE", "swap today <@U_BOB>", "C1", client, "C_TEST"
    )
    assert "not your shift" in text_of(respond).lower()
    assert schedule.get_swap("2026-06-01") is None


@freeze_time(MON)
def test_target_mention_unregistered(
    slackbot_app, schedule, seed, respond, client, text_of
):
    seed.roster("114", "Alice", slack_user_id="U_ALICE")
    seed.weekly("Monday", "114", "Alice")
    slackbot_app._handle_swap(
        respond, schedule, "U_ALICE", "swap today <@U_GHOST>", "C1", client, "C_TEST"
    )
    assert "isn't registered" in text_of(respond)


@freeze_time(MON)
def test_target_extension_not_found(
    slackbot_app, schedule, seed, respond, client, text_of
):
    seed.roster("114", "Alice", slack_user_id="U_ALICE")
    seed.weekly("Monday", "114", "Alice")
    slackbot_app._handle_swap(
        respond, schedule, "U_ALICE", "swap today 999", "C1", client, "C_TEST"
    )
    assert "not found" in text_of(respond).lower()


@freeze_time(MON)
def test_past_date(slackbot_app, schedule, seed, respond, client, text_of):
    _setup(seed)
    slackbot_app._handle_swap(
        respond, schedule, "U_ALICE", "swap 2026-05-01 <@U_BOB>", "C1", client, "C_TEST"
    )
    assert "past" in text_of(respond).lower()


@freeze_time(MON)
def test_unregistered_requester(slackbot_app, schedule, respond, client, text_of):
    slackbot_app._handle_swap(
        respond, schedule, "U_NOBODY", "swap today 115", "C1", client, "C_TEST"
    )
    assert "not registered" in text_of(respond).lower()


@freeze_time(MON)
def test_usage(slackbot_app, schedule, respond, client, text_of):
    slackbot_app._handle_swap(
        respond, schedule, "U_ALICE", "swap today", "C1", client, "C_TEST"
    )
    assert "Usage" in text_of(respond)