import asyncio
from datetime import datetime, timezone

import app.webhooks_chatwoot as webhook
import app.persistence as persistence
from app.persistence import _message_created_at


def _payload(*, private=False, message_id=712, content="Resposta pública"):
    return {
        "event": "message_created",
        "id": message_id,
        "message_type": "outgoing",
        "private": private,
        "content": content,
        "created_at": 1_700_000_000,
        "conversation": {"id": 2450},
        "sender": {"id": 9, "name": "Operador", "type": "user"},
    }


def test_chatwoot_timestamp_preserves_epoch_and_iso():
    assert _message_created_at(1_700_000_000) == datetime.fromtimestamp(1_700_000_000, tz=timezone.utc)
    assert _message_created_at("2026-08-15T10:20:30Z") == datetime(2026, 8, 15, 10, 20, 30, tzinfo=timezone.utc)


def test_outgoing_public_persists_fact_before_existing_outgoing_processing(monkeypatch):
    calls = []
    monkeypatch.setattr(webhook, "save_factual_chatwoot_message", lambda **kw: (calls.append(("message", kw)) or ("msg-1", True)))
    monkeypatch.setattr(webhook, "auto_complete_task_from_outgoing_message", lambda **kw: (calls.append(("outgoing", kw)) or {"status": "no_matching_pending_task"}))
    monkeypatch.setattr(webhook, "mark_raw_event_processed", lambda **kw: calls.append(("processed", kw)))

    result = asyncio.run(webhook.process_saved_chatwoot_raw_event("00000000-0000-0000-0000-000000000001", _payload()))

    assert [call[0] for call in calls] == ["message", "outgoing", "processed"]
    assert calls[0][1]["direction"] == "outbound"
    assert calls[0][1]["source_event_id"] == "712"
    assert calls[0][1]["contact_id"] is None
    assert calls[0][1]["source_created_at"] == 1_700_000_000
    assert result["message_id"] == "msg-1"


def test_outgoing_public_does_not_enter_inbound_analysis(monkeypatch):
    monkeypatch.setattr(webhook, "save_factual_chatwoot_message", lambda **kw: ("msg-1", True))
    monkeypatch.setattr(webhook, "auto_complete_task_from_outgoing_message", lambda **kw: {"status": "no_matching_pending_task"})
    monkeypatch.setattr(webhook, "mark_raw_event_processed", lambda **kw: None)

    async def forbidden(*args, **kwargs):
        raise AssertionError("outgoing factual messages must not enter classification")

    monkeypatch.setattr(webhook, "analyze", forbidden)
    asyncio.run(webhook.process_saved_chatwoot_raw_event("00000000-0000-0000-0000-000000000001", _payload()))


def test_outgoing_private_note_is_not_persisted_as_public_message(monkeypatch):
    monkeypatch.setattr(webhook, "save_factual_chatwoot_message", lambda **kw: (_ for _ in ()).throw(AssertionError("private note persisted")))
    monkeypatch.setattr(webhook, "auto_complete_task_from_outgoing_message", lambda **kw: {"status": "ignored_private_note"})
    monkeypatch.setattr(webhook, "mark_raw_event_processed", lambda **kw: None)

    result = asyncio.run(webhook.process_saved_chatwoot_raw_event("00000000-0000-0000-0000-000000000001", _payload(private=True)))
    assert result["message_id"] is None


def test_string_false_private_value_is_public():
    assert webhook.extract_chatwoot_event(_payload(private="false"))["is_private"] is False


def test_non_message_created_outgoing_event_is_not_persisted(monkeypatch):
    payload = _payload()
    payload["event"] = "conversation_updated"
    monkeypatch.setattr(webhook, "save_factual_chatwoot_message", lambda **kw: (_ for _ in ()).throw(AssertionError("wrong event persisted")))
    monkeypatch.setattr(webhook, "auto_complete_task_from_outgoing_message", lambda **kw: {"status": "no_matching_pending_task"})
    monkeypatch.setattr(webhook, "mark_raw_event_processed", lambda **kw: None)
    asyncio.run(webhook.process_saved_chatwoot_raw_event("00000000-0000-0000-0000-000000000001", payload))


class _Rows:
    def __init__(self, row=None):
        self.row = row

    def first(self):
        return self.row


class _PersistenceConnection:
    def __init__(self):
        self.message_id = None
        self.inserts = 0

    def execute(self, statement, params=None):
        sql = str(statement)
        if "pg_advisory_xact_lock" in sql:
            return _Rows()
        if "SELECT id::text FROM messages" in sql:
            return _Rows((self.message_id,)) if self.message_id else _Rows()
        if "INSERT INTO messages" in sql:
            self.inserts += 1
            self.message_id = "00000000-0000-0000-0000-000000000099"
            return _Rows((self.message_id,))
        if "UPDATE raw_events SET message_id" in sql:
            return _Rows()
        raise AssertionError(sql)


class _Begin:
    def __init__(self, connection):
        self.connection = connection

    def __enter__(self):
        return self.connection

    def __exit__(self, *_args):
        return False


class _PersistenceEngine:
    def __init__(self):
        self.connection = _PersistenceConnection()

    def begin(self):
        return _Begin(self.connection)


def test_factual_persistence_is_idempotent_by_source_identity(monkeypatch):
    fake = _PersistenceEngine()
    monkeypatch.setattr(persistence, "engine", fake)
    monkeypatch.setattr(persistence.settings, "clientflow_persist", True)
    kwargs = {
        "raw_event_id": "00000000-0000-0000-0000-000000000001",
        "source_event_id": "712",
        "conversation_id": "2450",
        "contact_id": None,
        "direction": "outbound",
        "raw_body": "Resposta",
        "source_created_at": 1_700_000_000,
    }
    first = persistence.save_factual_chatwoot_message(**kwargs)
    second = persistence.save_factual_chatwoot_message(**kwargs)
    assert first[1] is True
    assert second == (first[0], False)
    assert fake.connection.inserts == 1


class _BackfillPresence:
    def __init__(self, present=False):
        self.present = present

    def execute(self, statement, params=None):
        return _Rows((1,)) if self.present else _Rows()

    def rollback(self):
        return None

    def __enter__(self):
        return self

    def __exit__(self, *_args):
        return False


class _BackfillEngine:
    def __init__(self, presence):
        self.presence = presence

    def connect(self):
        return self.presence


def test_outbound_backfill_dry_run_apply_and_repeat(monkeypatch):
    import scripts.backfill_chatwoot_outbound_messages as backfill

    row = {
        "id": "00000000-0000-0000-0000-000000000001",
        "source_event_id": "712",
        "conversation_id": "2450",
        "contact_id": None,
        "payload": _payload(),
        "created_at": datetime(2026, 8, 15, tzinfo=timezone.utc),
    }
    presence = _BackfillPresence(False)
    monkeypatch.setattr(backfill, "_candidate_rows", lambda: [row])
    monkeypatch.setattr(backfill, "engine", _BackfillEngine(presence))
    writes = []

    def save(**kwargs):
        writes.append(kwargs)
        presence.present = True
        return "msg-1", True

    monkeypatch.setattr(backfill, "save_factual_chatwoot_message", save)

    assert backfill.backfill(apply=False) == {
        "candidates": 1, "inserted": 0, "already_present": 0, "skipped": 0, "errors": 0,
    }
    assert writes == []
    assert backfill.backfill(apply=True)["inserted"] == 1
    repeated = backfill.backfill(apply=True)
    assert repeated["inserted"] == 0
    assert repeated["already_present"] == 1
    assert len(writes) == 1