"""Tests for per-user IM channel connection persistence."""

from __future__ import annotations

from datetime import UTC, datetime, timedelta

import pytest
from sqlalchemy import select

from deerflow.persistence.channel_connections import (
    ChannelConnectionRepository,
    ChannelConnectionRow,
    ChannelCredentialCipher,
    ChannelCredentialRow,
    ChannelOAuthStateRow,
)


@pytest.fixture
async def repo(tmp_path):
    from deerflow.persistence.engine import close_engine, get_session_factory, init_engine

    url = f"sqlite+aiosqlite:///{tmp_path / 'channels.db'}"
    await init_engine("sqlite", url=url, sqlite_dir=str(tmp_path))
    try:
        yield ChannelConnectionRepository(
            get_session_factory(),
            cipher=ChannelCredentialCipher.from_key("test-encryption-key"),
        )
    finally:
        await close_engine()


class TestChannelConnectionRepository:
    @pytest.mark.anyio
    async def test_connections_are_listed_per_owner(self, repo):
        alice = await repo.upsert_connection(
            owner_user_id="alice",
            provider="slack",
            external_account_id="U-alice",
            external_account_name="Alice",
            workspace_id="T1",
            workspace_name="Team One",
            scopes=["chat:write"],
        )
        await repo.upsert_connection(
            owner_user_id="bob",
            provider="slack",
            external_account_id="U-bob",
            external_account_name="Bob",
            workspace_id="T1",
            workspace_name="Team One",
            scopes=["chat:write"],
        )

        results = await repo.list_connections("alice")

        assert [item["id"] for item in results] == [alice["id"]]
        assert results[0]["owner_user_id"] == "alice"
        assert results[0]["provider"] == "slack"
        assert results[0]["scopes"] == ["chat:write"]
        assert "encrypted_access_token" not in results[0]

    @pytest.mark.anyio
    async def test_upsert_connection_updates_existing_provider_identity(self, repo):
        first = await repo.upsert_connection(
            owner_user_id="alice",
            provider="telegram",
            external_account_id="42",
            external_account_name="Alice",
            workspace_id=None,
            workspace_name=None,
            status="pending",
        )
        second = await repo.upsert_connection(
            owner_user_id="alice",
            provider="telegram",
            external_account_id="42",
            external_account_name="Alice Telegram",
            workspace_id=None,
            workspace_name=None,
            status="connected",
        )

        assert second["id"] == first["id"]
        assert second["status"] == "connected"
        assert second["external_account_name"] == "Alice Telegram"
        assert len(await repo.list_connections("alice")) == 1

    @pytest.mark.anyio
    async def test_credentials_are_encrypted_at_rest_and_decrypted_by_repository(self, repo):
        connection = await repo.upsert_connection(
            owner_user_id="alice",
            provider="slack",
            external_account_id="U-alice",
            workspace_id="T1",
        )
        expires_at = datetime.now(UTC) + timedelta(hours=1)

        await repo.store_credentials(
            connection["id"],
            access_token="xoxb-secret-access-token",
            refresh_token="secret-refresh-token",
            token_type="Bearer",
            expires_at=expires_at,
            extra={"bot_user_id": "B123"},
        )

        async with repo.session_factory() as session:
            row = (await session.execute(select(ChannelCredentialRow))).scalar_one()
            assert row.encrypted_access_token is not None
            assert "xoxb-secret-access-token" not in row.encrypted_access_token
            assert "secret-refresh-token" not in (row.encrypted_refresh_token or "")
            assert "B123" not in (row.encrypted_extra_json or "")

        credentials = await repo.get_credentials(connection["id"])

        assert credentials is not None
        assert credentials["access_token"] == "xoxb-secret-access-token"
        assert credentials["refresh_token"] == "secret-refresh-token"
        assert credentials["token_type"] == "Bearer"
        assert credentials["expires_at"] == expires_at
        assert credentials["extra"] == {"bot_user_id": "B123"}

    @pytest.mark.anyio
    async def test_conversations_are_scoped_by_connection(self, repo):
        alice = await repo.upsert_connection(
            owner_user_id="alice",
            provider="slack",
            external_account_id="U-alice",
            workspace_id="T1",
        )
        bob = await repo.upsert_connection(
            owner_user_id="bob",
            provider="slack",
            external_account_id="U-bob",
            workspace_id="T1",
        )

        await repo.set_thread_id(
            connection_id=alice["id"],
            owner_user_id="alice",
            provider="slack",
            external_conversation_id="C-shared",
            external_topic_id="1710000000.000100",
            thread_id="thread-alice",
        )
        await repo.set_thread_id(
            connection_id=bob["id"],
            owner_user_id="bob",
            provider="slack",
            external_conversation_id="C-shared",
            external_topic_id="1710000000.000100",
            thread_id="thread-bob",
        )

        assert await repo.get_thread_id(alice["id"], "C-shared", "1710000000.000100") == "thread-alice"
        assert await repo.get_thread_id(bob["id"], "C-shared", "1710000000.000100") == "thread-bob"

    @pytest.mark.anyio
    async def test_disconnect_connection_revokes_owner_connection_and_removes_credentials(self, repo):
        connection = await repo.upsert_connection(
            owner_user_id="alice",
            provider="telegram",
            external_account_id="42",
        )
        await repo.store_credentials(connection["id"], access_token="secret-token")

        disconnected = await repo.disconnect_connection(
            connection_id=connection["id"],
            owner_user_id="alice",
        )

        assert disconnected is True
        async with repo.session_factory() as session:
            connection_row = await session.get(ChannelConnectionRow, connection["id"])
            credential_row = await session.get(ChannelCredentialRow, connection["id"])
        assert connection_row is not None
        assert connection_row.status == "revoked"
        assert credential_row is None
        assert (
            await repo.find_connection_by_external_identity(
                provider="telegram",
                external_account_id="42",
            )
            is None
        )

    @pytest.mark.anyio
    async def test_disconnect_connection_is_owner_scoped(self, repo):
        connection = await repo.upsert_connection(
            owner_user_id="alice",
            provider="telegram",
            external_account_id="42",
        )

        disconnected = await repo.disconnect_connection(
            connection_id=connection["id"],
            owner_user_id="bob",
        )

        assert disconnected is False
        assert (await repo.list_connections("alice"))[0]["status"] == "connected"

    @pytest.mark.anyio
    async def test_consume_oauth_state_deletes_expired_states(self, repo):
        now = datetime.now(UTC)
        await repo.create_oauth_state(
            owner_user_id="alice",
            provider="slack",
            state="expired-state",
            expires_at=now - timedelta(minutes=1),
        )
        await repo.create_oauth_state(
            owner_user_id="alice",
            provider="slack",
            state="active-state",
            expires_at=now + timedelta(minutes=5),
        )

        consumed = await repo.consume_oauth_state(provider="slack", state="expired-state", now=now)

        assert consumed is None
        async with repo.session_factory() as session:
            states = (await session.execute(select(ChannelOAuthStateRow))).scalars().all()
        assert [state.state_hash for state in states] == [repo.hash_state("active-state")]
