"""Integration tests for channels message_router endpoints."""

from __future__ import annotations

import httpx
import pytest

from .conftest import (
    BASE_URL,
    DEFAULT_CHANNEL_TYPE,
    ISO_TIME_END,
    ISO_TIME_START,
    NON_EXISTENT_MESSAGE_ID,
)

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

MESSAGES_URL = f"{BASE_URL}/messages"


# =============================================================================
# === Auth three-tier for GET /messages ===
# =============================================================================


async def test_list_messages_requires_auth(test_client: httpx.AsyncClient):
    # Act
    response = await test_client.get(MESSAGES_URL)
    # Assert
    assert response.status_code == 401


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


async def test_admin_can_list_messages(test_client: httpx.AsyncClient, admin_headers):
    # Act
    response = await test_client.get(MESSAGES_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 isinstance(payload["data"]["items"], list)


# =============================================================================
# === GET /messages pagination validation ===
# =============================================================================


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


async def test_list_messages_rejects_limit_over_max(test_client: httpx.AsyncClient, admin_headers):
    # Act — limit=201 violates le=200
    response = await test_client.get(
        MESSAGES_URL,
        params={"limit": 201},
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 422, response.text


async def test_admin_can_list_messages_with_time_range(test_client: httpx.AsyncClient, admin_headers):
    # Arrange
    params = {
        "channel_type": DEFAULT_CHANNEL_TYPE,
        "start_time": ISO_TIME_START,
        "end_time": ISO_TIME_END,
        "limit": 10,
        "offset": 0,
    }
    # Act
    response = await test_client.get(MESSAGES_URL, params=params, 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 isinstance(payload["data"]["items"], list)


# =============================================================================
# === GET /messages/search ===
# =============================================================================


async def test_search_messages_requires_keyword(test_client: httpx.AsyncClient, admin_headers):
    # Act — keyword is required
    response = await test_client.get(f"{MESSAGES_URL}/search", headers=admin_headers)
    # Assert
    assert response.status_code == 422, response.text


async def test_search_messages_rejects_short_keyword(test_client: httpx.AsyncClient, admin_headers):
    # Act — keyword shorter than min_length=2
    response = await test_client.get(
        f"{MESSAGES_URL}/search",
        params={"keyword": "a"},
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 422, response.text


async def test_admin_can_search_messages(test_client: httpx.AsyncClient, admin_headers):
    # Arrange
    params = {
        "keyword": "pytest",
        "channel_type": DEFAULT_CHANNEL_TYPE,
        "limit": 5,
        "offset": 0,
    }
    # Act
    response = await test_client.get(
        f"{MESSAGES_URL}/search",
        params=params,
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 200, response.text

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


# =============================================================================
# === POST /messages/batch-recall ===
# =============================================================================


async def test_batch_recall_rejects_empty_message_ids(test_client: httpx.AsyncClient, admin_headers):
    # Arrange — message_ids min_length=1
    body = {"message_ids": []}
    # Act
    response = await test_client.post(
        f"{MESSAGES_URL}/batch-recall",
        json=body,
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 422, response.text


async def test_batch_recall_rejects_too_many_message_ids(test_client: httpx.AsyncClient, admin_headers):
    # Arrange — message_ids max_length=500
    body = {"message_ids": [f"msg_{i}" for i in range(501)]}
    # Act
    response = await test_client.post(
        f"{MESSAGES_URL}/batch-recall",
        json=body,
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 422, response.text


async def test_batch_recall_with_non_existent_ids_returns_partial_success(
    test_client: httpx.AsyncClient, admin_headers
):
    # Arrange — non-existent message_ids, partial success semantics
    body = {"message_ids": [NON_EXISTENT_MESSAGE_ID], "reason": "pytest recall"}
    # Act
    response = await test_client.post(
        f"{MESSAGES_URL}/batch-recall",
        json=body,
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 200, response.text

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


# =============================================================================
# === GET /messages/{message_id} ===
# =============================================================================


async def test_get_message_returns_404_for_non_existent(test_client: httpx.AsyncClient, admin_headers):
    # Act
    response = await test_client.get(
        f"{MESSAGES_URL}/{NON_EXISTENT_MESSAGE_ID}",
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text


async def test_get_message_status_returns_404_for_non_existent(test_client: httpx.AsyncClient, admin_headers):
    # Act
    response = await test_client.get(
        f"{MESSAGES_URL}/{NON_EXISTENT_MESSAGE_ID}/status",
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text


# =============================================================================
# === Static paths not captured by /{message_id} ===
# =============================================================================


async def test_search_path_not_captured_by_message_id(test_client: httpx.AsyncClient, admin_headers):
    # Act — /search must route to search endpoint, not /{message_id}
    response = await test_client.get(
        f"{MESSAGES_URL}/search",
        params={"keyword": "pytest"},
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 200, response.text


async def test_batch_recall_path_not_captured_by_message_id(test_client: httpx.AsyncClient, admin_headers):
    # Act — /batch-recall must route to batch-recall endpoint
    response = await test_client.post(
        f"{MESSAGES_URL}/batch-recall",
        json={"message_ids": [NON_EXISTENT_MESSAGE_ID]},
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 200, response.text


# =============================================================================
# === POST /{channel_type}/messages (admin send) ===
# =============================================================================


async def test_send_admin_message_requires_idempotency_key(test_client: httpx.AsyncClient, admin_headers):
    # Arrange — missing X-Idempotency-Key header
    body = {
        "target": "test_target",
        "content": {"text": "pytest message"},
        "conversation_policy": "reuse-or-create",
    }
    # Act
    response = await test_client.post(
        f"{BASE_URL}/{DEFAULT_CHANNEL_TYPE}/messages",
        json=body,
        headers=admin_headers,
    )
    # Assert — FastAPI Header(...) 缺失返回 422（RequestValidationError）
    assert response.status_code == 422, response.text


async def test_send_admin_message_with_non_existent_account_returns_404_or_400(
    test_client: httpx.AsyncClient, admin_headers
):
    # Arrange — idempotency key present but target references non-existent account.
    # target 必须为 ``channel_type:account_id:session_id`` 三段格式，否则
    # _resolveTarget 返回 channel_type=None 直接进入 per-target failures 分支
    # （返回 200），无法触发 NotFoundError（404）路径。
    body = {
        "target": f"{DEFAULT_CHANNEL_TYPE}:nonexistent_account:session123",
        "content": {"text": "pytest message"},
        "conversation_policy": "reuse-or-create",
    }
    headers = {**admin_headers, "X-Idempotency-Key": "test-key-send-non-existent"}
    # Act
    response = await test_client.post(
        f"{BASE_URL}/{DEFAULT_CHANNEL_TYPE}/messages",
        json=body,
        headers=headers,
    )
    # Assert — non-existent target / account yields 404 or 400
    assert response.status_code in (400, 404), response.text


# =============================================================================
# === POST /{channel_type}/messages/attachments ===
# =============================================================================


async def test_upload_attachment_requires_file(test_client: httpx.AsyncClient, admin_headers):
    # Arrange — missing file upload
    data = {"account_id": "test_account", "purpose": "test"}
    # Act
    response = await test_client.post(
        f"{BASE_URL}/{DEFAULT_CHANNEL_TYPE}/messages/attachments",
        data=data,
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 422, response.text


# =============================================================================
# === POST /{channel_type}/messages/{message_id}/recall ===
# =============================================================================


async def test_recall_message_returns_404_for_non_existent(test_client: httpx.AsyncClient, admin_headers):
    # Act
    response = await test_client.post(
        f"{BASE_URL}/{DEFAULT_CHANNEL_TYPE}/messages/{NON_EXISTENT_MESSAGE_ID}/recall",
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text


# =============================================================================
# === POST /{channel_type}/messages/{message_id}/resend ===
# =============================================================================


async def test_resend_message_returns_404_for_non_existent(test_client: httpx.AsyncClient, admin_headers):
    # Arrange
    body = {"target": "test_target", "reason": "pytest resend"}
    # Act
    response = await test_client.post(
        f"{BASE_URL}/{DEFAULT_CHANNEL_TYPE}/messages/{NON_EXISTENT_MESSAGE_ID}/resend",
        json=body,
        headers=admin_headers,
    )
    # Assert
    assert response.status_code == 404, response.text