import uuid

import httpx
import pytest

from app.integrations import (
    DependencyFailure,
    OpenLinesClient,
    SafetyClient,
    fresh_openlines_payload,
)
from app.settings import Settings


def settings() -> Settings:
    common = {
        "APP_ENV": "test",
        "DATABASE_URL": "postgresql+asyncpg://u:p@localhost/db",
        "REDIS_URL": "redis://localhost/0",
        "REDIS_REALTIME_URL": "redis://localhost/1",
        "KEYCLOAK_PUBLIC_URL": "https://auth.example",
        "KEYCLOAK_INTERNAL_URL": "http://keycloak:8080",
        "KEYCLOAK_REALM": "han",
        "KEYCLOAK_AUDIENCE": "api",
        "MESSAGE_SAFETY_URL": "http://safety:8080",
        "MESSAGE_SAFETY_SERVICE_TOKEN": "safety-token",
        "BITRIX_LOCAL_APP_BASE_URL": "http://bitrix:8080",
        "BITRIX_LOCAL_APP_INTERNAL_TOKEN": "bitrix-token",
        "BITRIX_API_INBOX_TOKEN": "inbox-token",
        "KEYCLOAK_SETTINGS_BRIDGE_TOKEN": "settings-token",
        "SELECTEL_S3_ENDPOINT_URL": "https://s3.example",
        "SELECTEL_S3_BUCKET_DOCUMENTS": "documents",
        "SELECTEL_S3_BUCKET_ATTACHMENTS": "attachments",
        "SELECTEL_S3_BUCKET_QUARANTINE": "quarantine",
        "SELECTEL_S3_ACCESS_KEY": "access",
        "SELECTEL_S3_SECRET_KEY": "secret",
        "CURSOR_HMAC_SECRET": "x" * 32,
    }
    return Settings.model_validate(common)


@pytest.mark.asyncio
async def test_safety_contract_status_and_service_token() -> None:
    async def handler(request: httpx.Request) -> httpx.Response:
        assert request.headers["X-Service-Token"] == "safety-token"
        assert request.url.path == "/internal/safety/v1/messages/check"
        return httpx.Response(203, json={"verdict": "pending", "task_id": "task-1"})

    async with httpx.AsyncClient(transport=httpx.MockTransport(handler)) as http:
        result = await SafetyClient(settings(), http).check(
            {"message_id": str(uuid.uuid4()), "content_kind": "text", "text": "hello"},
            "request-1",
        )
    assert result == {"verdict": "pending", "task_id": "task-1", "_status": 203}


@pytest.mark.asyncio
async def test_safety_file_body_uses_exact_attachment_schema() -> None:
    attachment_id = uuid.uuid4()

    async def handler(request: httpx.Request) -> httpx.Response:
        body = __import__("json").loads(request.content)
        assert body["attachment"] == {
            "attachment_id": str(attachment_id),
            "quarantine_object_key": "quarantine/users/u/file",
            "mime_type": "application/pdf",
            "size_bytes": 42,
            "checksum": "sha256:" + "a" * 64,
        }
        assert "file" not in body
        return httpx.Response(200, json={"verdict": "allow"})

    payload = {
        "message_id": str(uuid.uuid4()),
        "content_kind": "file",
        "text": "",
        "attachment": {
            "attachment_id": str(attachment_id),
            "quarantine_object_key": "quarantine/users/u/file",
            "mime_type": "application/pdf",
            "size_bytes": 42,
            "checksum": "sha256:" + "a" * 64,
        },
    }
    async with httpx.AsyncClient(transport=httpx.MockTransport(handler)) as http:
        await SafetyClient(settings(), http).check(payload, "request-1")


@pytest.mark.asyncio
async def test_safety_auth_failure_is_dependency_failure() -> None:
    async def handler(_: httpx.Request) -> httpx.Response:
        return httpx.Response(401, json={"error": {"code": "service_unauthorized"}})

    async with httpx.AsyncClient(transport=httpx.MockTransport(handler)) as http:
        with pytest.raises(DependencyFailure):
            await SafetyClient(settings(), http).check(
                {"message_id": str(uuid.uuid4()), "content_kind": "text", "text": "hello"},
                "request-1",
            )


@pytest.mark.asyncio
async def test_openlines_contract_uses_bearer_and_idempotency() -> None:
    message_id = uuid.uuid4()

    async def handler(request: httpx.Request) -> httpx.Response:
        assert request.headers["Authorization"] == "Bearer bitrix-token"
        assert request.headers["Idempotency-Key"] == str(message_id)
        assert request.url.path == "/internal/openlines/v1/messages"
        return httpx.Response(201, json={"status": "accepted"})

    async with httpx.AsyncClient(transport=httpx.MockTransport(handler)) as http:
        result = await OpenLinesClient(settings(), http).send(
            message_id, {"message_id": str(message_id)}, "request-1"
        )
    assert result["status"] == "accepted"


@pytest.mark.asyncio
async def test_openlines_payload_gets_fresh_download_url_without_storage_fields() -> None:
    class FakeS3:
        calls = 0

        async def presign_get(self, bucket: str, key: str, ttl: int = 300) -> str:
            self.calls += 1
            return f"https://download.example/{bucket}/{key}?generation={self.calls}"

    payload = {
        "message_id": str(uuid.uuid4()),
        "external_chat_id": str(uuid.uuid4()),
        "occurred_at": "2026-07-10T12:00:00+00:00",
        "user": {"id": str(uuid.uuid4()), "display_name": "+79990000000"},
        "message": {
            "content_kind": "file",
            "text": "",
            "files": [{
                "attachment_id": str(uuid.uuid4()),
                "name": "file.pdf",
                "mime_type": "application/pdf",
                "size_bytes": 42,
                "_storage_bucket": "attachments",
                "_object_key": "dialogs/d/file",
            }],
        },
    }
    s3 = FakeS3()
    first = await fresh_openlines_payload(payload, s3)  # type: ignore[arg-type]
    second = await fresh_openlines_payload(payload, s3)  # type: ignore[arg-type]
    assert first["occurred_at"] and first["user"]["id"]
    assert first["message"]["content_kind"] == "file"
    assert (
        first["message"]["files"][0]["download_url"]
        != second["message"]["files"][0]["download_url"]
    )
    assert all(not key.startswith("_") for key in first["message"]["files"][0])