# Start the services before running:
#   docker compose -f tests/docker/docker-compose.yml up -d
# Stop after:
#   docker compose -f tests/docker/docker-compose.yml down -v

from contextlib import asynccontextmanager
from uuid import uuid4

import obstore
import pytest

from haiku.rag.app import HaikuRAGApp
from haiku.rag.client import HaikuRAG
from haiku.rag.client.scope import DatabaseScope
from haiku.rag.config.models import AppConfig, LanceDBConfig
from haiku.rag.s3 import make_s3_store
from haiku.rag.store.engine import ConnectionMode, Store
from tests.services import reachable

S3_ENDPOINT = "http://localhost:8333"
S3_BUCKET = "test-bucket"
S3_STORAGE_OPTIONS = {
    "endpoint": S3_ENDPOINT,
    "region": "us-east-1",
    "allow_http": "true",
    "aws_access_key_id": "testkey",
    "aws_secret_access_key": "testsecret",
}


pytestmark = [
    pytest.mark.integration,
    pytest.mark.skipif(
        not reachable("localhost", 8333),
        reason="SeaweedFS not running on localhost:8333",
    ),
]


def _make_config() -> AppConfig:
    unique_prefix = uuid4().hex[:8]
    return AppConfig(
        lancedb=LanceDBConfig(
            uri=f"s3://{S3_BUCKET}/test-{unique_prefix}",
            storage_options=S3_STORAGE_OPTIONS,
        )
    )


@pytest.fixture
def config():
    """A config pointing at a unique S3 prefix, cleaned up after the test.

    SeaweedFS reclaims volume space lazily, so leaving each run's data behind
    eventually fills the volume server and seals its volumes read-only, which
    makes every subsequent write block forever.
    """
    config = _make_config()
    yield config

    bucket, _, prefix = config.lancedb.uri.removeprefix("s3://").partition("/")
    store = make_s3_store(bucket, S3_STORAGE_OPTIONS)
    paths = [obj["path"] for batch in store.list(prefix=f"{prefix}/") for obj in batch]
    if paths:
        obstore.delete(store, paths)


def _remote_scope(config: AppConfig) -> DatabaseScope:
    """The configured S3 database.

    These tests name no path, and the assertion pins that the scope resolved to
    the URI.
    """
    scope = DatabaseScope.resolve(config)
    [ref] = scope.databases
    assert ref.db_path is None and ref.uri.startswith("s3://")
    return scope


@asynccontextmanager
async def _remote_client(config: AppConfig):
    """A client on the configured S3 database, asserting it went there."""
    async with HaikuRAG(config=config, create=True) as rag:
        assert rag.store._connection_mode is ConnectionMode.OBJECT_STORAGE
        yield rag


@pytest.mark.asyncio
async def test_store_connect_and_create(tmp_path, config):
    from haiku.rag.store.info import get_database_stats

    async with Store(tmp_path / "unused", config=config, create=True) as store:
        stats = await get_database_stats(store.db)
        assert stats["documents"]["exists"]
        assert stats["chunks"]["exists"]


@pytest.mark.asyncio
async def test_store_vacuum(tmp_path, config):
    async with Store(tmp_path / "unused", config=config, create=True) as store:
        await store.vacuum()


@pytest.mark.asyncio
async def test_store_add_document(tmp_path, config):
    from haiku.rag.store.info import get_database_stats
    from haiku.rag.store.schema import DocumentRecord

    async with Store(tmp_path / "unused", config=config, create=True) as store:
        doc = DocumentRecord(content="The quick brown fox jumps over the lazy dog.")
        await store.documents_table.add([doc])

        stats = await get_database_stats(store.db)
        assert stats["documents"]["num_rows"] == 1


@pytest.mark.asyncio
async def test_client_create_document(config):
    async with _remote_client(config) as rag:
        doc = await rag.create_document(
            "Python is a programming language.", uri="test://python"
        )
        assert doc.id
        assert doc.uri == "test://python"


@pytest.mark.asyncio
async def test_client_list_documents(config):
    async with _remote_client(config) as rag:
        await rag.create_document("First document.", uri="test://first")
        await rag.create_document("Second document.", uri="test://second")

        docs = await rag.list_documents()
        assert len(docs) == 2


@pytest.mark.asyncio
async def test_client_search(config):
    async with _remote_client(config) as rag:
        await rag.create_document(
            "The Eiffel Tower is located in Paris, France.", uri="test://eiffel"
        )
        results = await rag.search("Eiffel Tower")
        assert len(results) > 0
        assert "Eiffel" in results[0].content


@pytest.mark.asyncio
async def test_client_delete_document(config):
    async with _remote_client(config) as rag:
        doc = await rag.create_document("Temporary document.", uri="test://temp")
        await rag.delete_document(doc.id)
        docs = await rag.list_documents()
        assert len(docs) == 0


@pytest.mark.asyncio
async def test_app_info(capsys, config):
    async with _remote_client(config) as rag:
        await rag.create_document("Info test document.", uri="test://info")

    app = HaikuRAGApp(scope=_remote_scope(config), config=config)
    await app.info()

    out = capsys.readouterr().out
    assert "path:" in out
    assert config.lancedb.uri in out
    assert "documents: 1" in out


@pytest.mark.asyncio
async def test_app_info_empty_db(capsys, config):
    app = HaikuRAGApp(scope=_remote_scope(config), config=config)
    await app.info()

    out = capsys.readouterr().out
    assert "Database is empty" in out