"""Tests for the weekly-post Lambda handler orchestration."""

import json
from pathlib import Path
from unittest.mock import MagicMock

import pytest
from freezegun import freeze_time

# 2026-06-08 is a Monday. Frozen to ET 08:00; handler is invoked with force=True
# to bypass the 7am DST guard except where the guard itself is under test.
MON_0800 = "2026-06-08 12:00:00"


@pytest.fixture
def slack(weeklypost_app, monkeypatch):
    """Fake Slack WebClient; chat_postMessage returns a message ts."""
    fake = MagicMock(name="slack")
    fake.chat_postMessage.return_value = {"ts": "999.000"}
    monkeypatch.setattr(weeklypost_app, "WebClient", MagicMock(return_value=fake))
    monkeypatch.setattr(weeklypost_app, "get_secret", lambda _id: "xoxb-test")
    return fake


@pytest.fixture
def env(monkeypatch):
    monkeypatch.setenv(
        "SLACK_BOT_TOKEN_SECRET", "afterhours-shift-manager/slack-bot-token"
    )
    monkeypatch.setenv("PAY_REPORT_USER", "U_BOSS")
    monkeypatch.setenv(
        "CHECKCOMPONENTS_QUEUE_URL",
        "https://sqs.us-east-1.amazonaws.com/011934824531/paychex-checkcomponents",
    )


@pytest.fixture
def sqs(weeklypost_app, monkeypatch):
    fake = MagicMock(name="sqs")

    def client(svc, **kw):
        if svc == "sqs":
            return fake
        return MagicMock(name=svc)

    monkeypatch.setattr(weeklypost_app.boto3, "client", client)
    return fake


@freeze_time(MON_0800)
def test_posts_schedule_and_saves_post(weeklypost_app, schedule, seed, slack, env, sqs):
    result = weeklypost_app.handler({"force": True}, None)

    assert result["posted"] is True
    assert result["message_ts"] == "999.000"
    # The new schedule post was persisted for next week's cleanup.
    assert schedule.get_schedule_post("C_TEST")["message_ts"] == "999.000"
    slack.chat_postMessage.assert_called()
    sqs.send_message.assert_not_called()


@freeze_time(MON_0800)
def test_calculates_and_dms_pay(weeklypost_app, schedule, seed, slack, env, sqs):
    # Previous week (Mon 2026-06-01) had Alice on the Monday night shift.
    seed.config(shift_rate="50")
    seed.weekly("Monday", "114", "Alice")

    result = weeklypost_app.handler({"force": True}, None)

    assert result["pay_calculated"] is True
    # Pay record saved under previous Monday's key.
    assert schedule.get_pay_record("2026-06-01") is not None
    # A DM went to the configured pay-report user.
    dm_calls = [
        c
        for c in slack.chat_postMessage.call_args_list
        if c.kwargs.get("channel") == "U_BOSS"
    ]
    assert dm_calls
    sqs.send_message.assert_called_once()
    body = json.loads(sqs.send_message.call_args.kwargs["MessageBody"])
    assert body["type"] == "checkcomponents"
    assert body["kind"] == "after_hours"
    assert body["windowStart"] == "2026-06-01"
    assert body["windowEnd"] == "2026-06-07"
    assert "payPeriodId" not in body
    assert body["lines"] == [{"extension": "114", "amount": "50.00"}]
    assert schedule.get_pay_record("2026-06-01")["checkcomponents_sent"] is True


@freeze_time(MON_0800)
def test_rolls_existing_post_forward(weeklypost_app, schedule, seed, slack, env, sqs):
    # An existing post is deleted + reposted so it lands at the bottom every
    # Monday. The old ts is cleaned up and a new one is stored.
    seed.schedule_post("C_TEST", "111.111")
    result = weeklypost_app.handler({"force": True}, None)

    slack.chat_delete.assert_called_once()
    assert slack.chat_delete.call_args.kwargs["ts"] == "111.111"
    slack.chat_update.assert_not_called()
    slack.chat_postMessage.assert_called_once()
    # New ts from the repost is stored.
    assert result["message_ts"] == "999.000"
    assert schedule.get_schedule_post("C_TEST")["message_ts"] == "999.000"


@freeze_time(MON_0800)
def test_reposts_when_delete_fails(weeklypost_app, schedule, seed, slack, env, sqs):
    # A stored post that can no longer be deleted (e.g. was already removed
    # manually) still reposts — the delete failure is non-fatal.
    seed.schedule_post("C_TEST", "111.111")
    slack.chat_delete.side_effect = Exception("message_not_found")

    result = weeklypost_app.handler({"force": True}, None)

    slack.chat_postMessage.assert_called()
    assert result["message_ts"] == "999.000"
    assert schedule.get_schedule_post("C_TEST")["message_ts"] == "999.000"


@freeze_time(MON_0800)
def test_rolls_back_repost_when_save_fails(
    weeklypost_app, schedule, seed, slack, env, monkeypatch, sqs
):
    # If persisting the fresh post's ts fails after the repost has already
    # landed, the just-posted message is deleted so an async retry can't leave
    # an orphaned duplicate. The error still propagates.
    seed.schedule_post("C_TEST", "111.111")
    monkeypatch.setattr(
        weeklypost_app.ShiftSchedule,
        "save_schedule_post",
        MagicMock(side_effect=Exception("dynamo down")),
    )

    with pytest.raises(Exception, match="dynamo down"):
        weeklypost_app.handler({"force": True}, None)

    # Old post deleted for the rollover, then the fresh (999.000) post rolled
    # back when its ts couldn't be persisted.
    deleted_ts = [c.kwargs["ts"] for c in slack.chat_delete.call_args_list]
    assert deleted_ts == ["111.111", "999.000"]


@freeze_time(MON_0800)
def test_skips_when_not_7am_and_not_forced(weeklypost_app, schedule, slack, env, sqs):
    # Frozen hour is 08:00 ET, not 07:00 → skip unless forced.
    result = weeklypost_app.handler({}, None)
    assert result == {"skipped": True}
    slack.chat_postMessage.assert_not_called()
    sqs.send_message.assert_not_called()


@freeze_time(MON_0800)
def test_checkcomponents_failure_does_not_block_schedule_post(
    weeklypost_app, schedule, seed, slack, env, monkeypatch, sqs
):
    seed.config(shift_rate="50")
    seed.weekly("Monday", "114", "Alice")
    monkeypatch.setattr(
        weeklypost_app,
        "_send_checkcomponents",
        MagicMock(side_effect=Exception("SQS AccessDenied")),
    )

    result = weeklypost_app.handler({"force": True}, None)

    assert result["posted"] is True
    assert schedule.get_schedule_post("C_TEST")["message_ts"] == "999.000"


@freeze_time(MON_0800)
def test_empty_queue_url_skips_checkcomponents(
    weeklypost_app, schedule, seed, slack, env, sqs, monkeypatch
):
    monkeypatch.setenv("CHECKCOMPONENTS_QUEUE_URL", "")
    seed.config(shift_rate="50")
    seed.weekly("Monday", "114", "Alice")

    result = weeklypost_app.handler({"force": True}, None)

    assert result["posted"] is True
    sqs.send_message.assert_not_called()
    assert "checkcomponents_sent" not in (schedule.get_pay_record("2026-06-01") or {})


@freeze_time(MON_0800)
def test_save_failure_does_not_enqueue_checkcomponents(
    weeklypost_app, schedule, seed, slack, env, monkeypatch, sqs
):
    seed.config(shift_rate="50")
    seed.weekly("Monday", "114", "Alice")
    monkeypatch.setattr(
        weeklypost_app.ShiftSchedule,
        "save_schedule_post",
        MagicMock(side_effect=Exception("dynamo down")),
    )

    with pytest.raises(Exception, match="dynamo down"):
        weeklypost_app.handler({"force": True}, None)

    sqs.send_message.assert_not_called()
    assert "checkcomponents_sent" not in (schedule.get_pay_record("2026-06-01") or {})


@freeze_time(MON_0800)
def test_retry_does_not_resend_checkcomponents(
    weeklypost_app, schedule, seed, slack, env, sqs
):
    seed.config(shift_rate="50")
    seed.weekly("Monday", "114", "Alice")

    weeklypost_app.handler({"force": True}, None)
    weeklypost_app.handler({"force": True}, None)

    sqs.send_message.assert_called_once()
    assert schedule.get_pay_record("2026-06-01")["checkcomponents_sent"] is True


def test_payload_skips_fallback_and_zero(weeklypost_app):
    payload = weeklypost_app.build_checkcomponents_payload(
        {
            "week_start": "2026-06-01",
            "totals": {
                "Alice": {"extension": "114", "total": "75.5"},
                "Desk": {"extension": "100", "total": "50"},
                "Zero": {"extension": "200", "total": "0"},
            },
        }
    )
    assert payload["kind"] == "after_hours"
    assert payload["windowStart"] == "2026-06-01"
    assert payload["windowEnd"] == "2026-06-07"
    assert payload["lines"] == [{"extension": "114", "amount": "75.50"}]
    assert "payPeriodId" not in payload


def test_weekly_post_has_no_payroll_email_path():
    root = Path(__file__).resolve().parents[2]
    tf_text = "".join(p.read_text() for p in (root / "terraform").glob("*.tf"))
    for token in ("PAYROLL_RECIPIENTS", "SES_SENDER", "ses:", "PayrollEmailFailure"):
        assert token not in tf_text, token
    source = (root / "src" / "weekly-post" / "app.py").read_text()
    for token in ("_send_pay_email", "_build_pay_email_html", 'boto3.client("ses")'):
        assert token not in source, token