"""
Integration tests for the task management router.
"""

from __future__ import annotations

import asyncio
import os
import uuid

import pytest

pytestmark = [pytest.mark.asyncio, pytest.mark.integration]

_LITE_MODE = os.getenv("LITE_MODE", "").lower() in {"true", "1"}


async def test_task_routes_require_admin(test_client, standard_user):
    """Non-admin users should be blocked from accessing task APIs."""
    headers = standard_user["headers"]

    list_response = await test_client.get("/api/tasks", headers=headers)
    assert list_response.status_code == 403

    detail_response = await test_client.get("/api/tasks/some-task", headers=headers)
    assert detail_response.status_code == 403

    cancel_response = await test_client.post("/api/tasks/some-task/cancel", headers=headers)
    assert cancel_response.status_code == 403


async def test_admin_can_list_tasks(test_client, admin_headers):
    """Admin should receive a well-formed task list payload."""
    response = await test_client.get("/api/tasks", headers=admin_headers)
    assert response.status_code == 200, response.text

    payload = response.json()
    assert "tasks" in payload
    assert isinstance(payload["tasks"], list)
    assert "summary" in payload
    assert isinstance(payload["summary"], dict)


async def test_cancel_unknown_task_returns_client_error(test_client, admin_headers):
    """Cancelling a non-existent task should surface a 400 response."""
    response = await test_client.post("/api/tasks/not-real/cancel", headers=admin_headers)
    assert response.status_code == 400, response.text


async def test_enqueue_document_creates_task(
    test_client,
    admin_headers,
):
    """Trigger knowledge ingestion to ensure a task record is materialised."""
    if _LITE_MODE:
        enqueue_response = await test_client.post(
            "/api/knowledge/databases/lite-mode-disabled/documents",
            json={"items": [], "params": {"content_type": "file"}},
            headers=admin_headers,
        )
        assert enqueue_response.status_code == 404
        return

    create_response = await test_client.post(
        "/api/knowledge/databases",
        json={
            "database_name": f"pytest_task_router_{uuid.uuid4().hex[:8]}",
            "description": "Task router integration test",
            "embedding_model_spec": "siliconflow-cn:Pro/BAAI/bge-m3",
            "kb_type": "milvus",
            "additional_params": {},
        },
        headers=admin_headers,
    )
    assert create_response.status_code == 200, create_response.text
    kb_id = create_response.json()["kb_id"]

    try:
        enqueue_response = await test_client.post(
            f"/api/knowledge/databases/{kb_id}/documents",
            json={
                "items": [],
                "params": {"content_type": "file"},
            },
            headers=admin_headers,
        )
        assert enqueue_response.status_code == 200, enqueue_response.text

        enqueue_payload = enqueue_response.json()
        assert enqueue_payload.get("status") == "queued"
        task_id = enqueue_payload.get("task_id")
        assert task_id, "Knowledge ingestion did not return a task_id"

        # The task should be queryable immediately after enqueueing.
        detail_response = await test_client.get(f"/api/tasks/{task_id}", headers=admin_headers)
        assert detail_response.status_code == 200, detail_response.text
        detail_payload = detail_response.json().get("task", {})
        assert detail_payload.get("id") == task_id
        assert detail_payload.get("status") in {"queued", "pending", "running", "failed", "success", "cancelled"}

        # Ensure the task surfaces in the list endpoint within a short window.
        for _ in range(10):
            list_response = await test_client.get("/api/tasks", headers=admin_headers)
            assert list_response.status_code == 200, list_response.text
            all_tasks = list_response.json().get("tasks", [])
            if any(entry.get("id") == task_id for entry in all_tasks):
                break
            await asyncio.sleep(0.2)
        else:
            pytest.fail("Task did not appear in list endpoint within timeout window")

        # Poll for terminal state to validate worker bookkeeping.
        for _ in range(20):
            detail_response = await test_client.get(f"/api/tasks/{task_id}", headers=admin_headers)
            task_status = detail_response.json().get("task", {}).get("status")
            if task_status in {"success", "failed", "cancelled"}:
                break
            await asyncio.sleep(0.5)
        else:
            pytest.fail("Task did not reach a terminal status within timeout window")
    finally:
        await test_client.delete(f"/api/knowledge/databases/{kb_id}", headers=admin_headers)