"""Integration tests for channels session_router endpoints."""

from __future__ import annotations

import httpx
import pytest

from .conftest import (
    BASE_URL,
    NON_EXISTENT_SESSION_ID,
)

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

SESSIONS_URL = f"{BASE_URL}/sessions"


# =============================================================================
# === Auth three-tier for list sessions ===
# =============================================================================


async def test_list_sessions_requires_auth(test_client: httpx.AsyncClient):
    # Act
    response = await test_client.get(SESSIONS_URL)
    # Assert
    assert response.status_code == 401, response.text


async def test_list_sessions_forbids_standard_user(test_client: httpx.AsyncClient, standard_user):
    # Act
    response = await test_client.get(SESSIONS_URL, headers=standard_user["headers"])
    # Assert
    assert response.status_code == 403, response.text


async def test_admin_can_list_sessions(test_client: httpx.AsyncClient, admin_headers):
    # Act
    response = await test_client.get(SESSIONS_URL, headers=admin_headers)
    # Assert
    assert response.status_code == 200, response.text

    payload = response.json()
    assert payload["success"] is True
    assert isinstance(payload["data"], dict)
    assert "items" in payload["data"]


# =============================================================================
# === Pagination validation for list sessions ===
# =============================================================================


async def test_list_sessions_rejects_limit_zero(test_client: httpx.AsyncClient, admin_headers):
    # Act — limit=0 violates ge=1
    response = await test_client.get(
        SESSIONS_URL,
        params={"limit": 0},
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 422, response.text


async def test_list_sessions_rejects_limit_over_max(test_client: httpx.AsyncClient, admin_headers):
    # Act — limit=1001 violates le=1000
    response = await test_client.get(
        SESSIONS_URL,
        params={"limit": 1001},
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 422, response.text


# =============================================================================
# === batch-close ===
# =============================================================================


async def test_batch_close_sessions_requires_auth(test_client: httpx.AsyncClient):
    # Arrange
    body = {"session_ids": [NON_EXISTENT_SESSION_ID]}
    # Act
    response = await test_client.post(f"{SESSIONS_URL}/batch-close", json=body)
    # Assert
    assert response.status_code == 401, response.text


async def test_batch_close_sessions_forbids_standard_user(test_client: httpx.AsyncClient, standard_user):
    # Arrange
    body = {"session_ids": [NON_EXISTENT_SESSION_ID]}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/batch-close",
        json=body,
        headers=standard_user["headers"],
    )
    # Assert
    assert response.status_code == 403, response.text


async def test_batch_close_sessions_rejects_empty_body(test_client: httpx.AsyncClient, admin_headers):
    # Arrange — session_ids 与 filter 同时为空，dispatch 校验返回 400
    body = {"session_ids": None, "filter": None}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/batch-close",
        json=body,
        headers=admin_headers,
    )
    # Assert
    assert response.status_code in (400, 422), response.text


async def test_batch_close_sessions_with_non_existent_ids_returns_success(
    test_client: httpx.AsyncClient, admin_headers
):
    # Arrange — 不存在的 session_ids，部分成功语义下应返回 200
    body = {"session_ids": [NON_EXISTENT_SESSION_ID], "max_count": 100, "reason": "pytest"}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/batch-close",
        json=body,
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 200, response.text

    payload = response.json()
    assert payload["success"] is True


# =============================================================================
# === get session detail ===
# =============================================================================


async def test_get_session_requires_auth(test_client: httpx.AsyncClient):
    # Act
    response = await test_client.get(f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}")
    # Assert
    assert response.status_code == 401, response.text


async def test_get_session_forbids_standard_user(test_client: httpx.AsyncClient, standard_user):
    # Act
    response = await test_client.get(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}",
        headers=standard_user["headers"],
    )
    # Assert
    assert response.status_code == 403, response.text


async def test_get_session_non_existent_returns_404(test_client: httpx.AsyncClient, admin_headers):
    # Act
    response = await test_client.get(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}",
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text


# =============================================================================
# === merge session ===
# =============================================================================


async def test_merge_session_requires_auth(test_client: httpx.AsyncClient):
    # Arrange
    body = {"source_conversation_id": "conv_xxx", "reason": "pytest"}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/merge",
        json=body,
    )
    # Assert
    assert response.status_code == 401, response.text


async def test_merge_session_forbids_standard_user(test_client: httpx.AsyncClient, standard_user):
    # Arrange
    body = {"source_conversation_id": "conv_xxx", "reason": "pytest"}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/merge",
        json=body,
        headers=standard_user["headers"],
    )
    # Assert
    assert response.status_code == 403, response.text


async def test_merge_session_non_existent_returns_404(test_client: httpx.AsyncClient, admin_headers):
    # Arrange
    body = {"source_conversation_id": "conv_xxx", "reason": "pytest"}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/merge",
        json=body,
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text


# =============================================================================
# === transfer session owner ===
# =============================================================================


async def test_transfer_session_requires_auth(test_client: httpx.AsyncClient):
    # Arrange
    body = {"new_owner_id": "owner_xxx"}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/transfer",
        json=body,
    )
    # Assert
    assert response.status_code == 401, response.text


async def test_transfer_session_forbids_standard_user(test_client: httpx.AsyncClient, standard_user):
    # Arrange
    body = {"new_owner_id": "owner_xxx"}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/transfer",
        json=body,
        headers=standard_user["headers"],
    )
    # Assert
    assert response.status_code == 403, response.text


async def test_transfer_session_non_existent_returns_404(test_client: httpx.AsyncClient, admin_headers):
    # Arrange
    body = {"new_owner_id": "owner_xxx"}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/transfer",
        json=body,
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text


# =============================================================================
# === close session ===
# =============================================================================


async def test_close_session_requires_auth(test_client: httpx.AsyncClient):
    # Arrange
    body = {"reason": "pytest"}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/close",
        json=body,
    )
    # Assert
    assert response.status_code == 401, response.text


async def test_close_session_forbids_standard_user(test_client: httpx.AsyncClient, standard_user):
    # Arrange
    body = {"reason": "pytest"}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/close",
        json=body,
        headers=standard_user["headers"],
    )
    # Assert
    assert response.status_code == 403, response.text


async def test_close_session_non_existent_returns_404(test_client: httpx.AsyncClient, admin_headers):
    # Arrange
    body = {"reason": "pytest"}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/close",
        json=body,
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text


# =============================================================================
# === list session messages ===
# =============================================================================


async def test_list_session_messages_requires_auth(test_client: httpx.AsyncClient):
    # Act
    response = await test_client.get(f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/messages")
    # Assert
    assert response.status_code == 401, response.text


async def test_list_session_messages_forbids_standard_user(test_client: httpx.AsyncClient, standard_user):
    # Act
    response = await test_client.get(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/messages",
        headers=standard_user["headers"],
    )
    # Assert
    assert response.status_code == 403, response.text


async def test_list_session_messages_non_existent_returns_404(
    test_client: httpx.AsyncClient, admin_headers
):
    # Act
    response = await test_client.get(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/messages",
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text


async def test_list_session_messages_rejects_invalid_limit(
    test_client: httpx.AsyncClient, admin_headers
):
    # Act — limit=0 violates ge=1
    response = await test_client.get(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/messages",
        params={"limit": 0},
        headers=admin_headers,
    )
    # Assert — session 不存在或参数非法，至少不应是 200
    assert response.status_code in (404, 422), response.text


# =============================================================================
# === session stats ===
# =============================================================================


async def test_get_session_stats_requires_auth(test_client: httpx.AsyncClient):
    # Act
    response = await test_client.get(f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/stats")
    # Assert
    assert response.status_code == 401, response.text


async def test_get_session_stats_forbids_standard_user(test_client: httpx.AsyncClient, standard_user):
    # Act
    response = await test_client.get(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/stats",
        headers=standard_user["headers"],
    )
    # Assert
    assert response.status_code == 403, response.text


async def test_get_session_stats_non_existent_returns_404(
    test_client: httpx.AsyncClient, admin_headers
):
    # Act
    response = await test_client.get(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/stats",
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text


# =============================================================================
# === bind-user / unbind-user / identity (P3) ===
# =============================================================================


async def test_bind_session_user_non_existent_returns_404(
    test_client: httpx.AsyncClient, admin_headers
):
    # Arrange
    body = {"user_uid": "non_existent_user_uid"}
    # Act
    response = await test_client.post(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/bind-user",
        json=body,
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text


async def test_unbind_session_user_non_existent_returns_404(
    test_client: httpx.AsyncClient, admin_headers
):
    # Act
    response = await test_client.delete(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/bind-user",
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text


async def test_get_session_identity_non_existent_returns_404(
    test_client: httpx.AsyncClient, admin_headers
):
    # Act
    response = await test_client.get(
        f"{SESSIONS_URL}/{NON_EXISTENT_SESSION_ID}/identity",
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text