"""Tests for the WhatsApp chat-group scraper.

Drives the real page-number pagination + normalization logic through
``respx`` by wiring a real ``YunkeClient`` (primed with a fake session so the
login flow is skipped) against a mocked transport.

WA groups reuse the SAME upstream endpoint as WA friends
(``POST /qqweb/WhatsAppUser/businessFriendList``); the ``type="1"`` body
parameter selects groups (``"0"`` selects friends). The response envelope is
identical to the WA friends scraper's (``data.overviews`` +
``data.totalCount``), so this test reuses
:func:`tests.cassettes.wa_friends_fixture.make_wa_friends_response` to build
capture-shaped envelopes.

The records mirror the field names returned by the WeChat
``friend_list/es`` group endpoint (``friendWxId`` / ``friendWxNickname`` /
``friendNum`` / ...) — the WA endpoint is assumed to return the same shape for
groups because both channels share the yunke CRM's friend-list contract.
``_normalize_whatsapp_group`` reuses the WeChat
:func:`app.scraper.wechat._normalize_chat_group` field mapping and overrides
``channel`` to ``"whatsapp"``.

NOTE: the group-type switch ``type="1"`` is UNVERIFIED (云客 risk-control
blocking live API calls as of 2026-08-11) — see the scraper docstring. These
tests pin the STRUCTURE (body shape, normalization, channel override,
pagination); only the param NAME may need a post-risk-control adjustment.

The fixture ships 3 records across 2 pages of size 2, plus a terminating
empty page (the documented primary stop signal for page-number endpoints):

* page 1 -> 2 records, ``totalCount=3``
* page 2 -> 1 record, ``totalCount=3``
* page 3 -> empty ``overviews`` array (no more rows)

The scraper must yield exactly the 3 records (normalized to ``ChatGroup``
snake_case columns + ``raw_json``, ``channel="whatsapp"``), make exactly 3
calls, and stop without a 4th. Member details are NOT surfaced by this
endpoint — ``member_ids`` is ``None`` and ``member_ids_list`` is ``[]`` on
every yielded record.
"""

from __future__ import annotations

import json as _json
from typing import Any

import httpx
import respx

from app.scraper.whatsapp import scrape_whatsapp_groups
from app.session.yunke_client import YunkeClient
from tests.cassettes.wa_friends_fixture import make_wa_friends_response

BASE = "https://crm2.yunkecn.com"
WA_FRIENDS_URL = f"{BASE}/qqweb/WhatsAppUser/businessFriendList"

USERID = "a" * 32
COMPANY = "8m0atd"

# Realistic, capture-shaped WA group records. Field names mirror the WeChat
# ``friend_list/es`` group payload (verified 2026-08-10 Playwright capture) —
# the WA ``businessFriendList`` endpoint is assumed to return the SAME shape
# for the group-type switch because both channels share the yunke CRM's
# friend-list contract. Every field with a target ``ChatGroup`` column is
# populated so the test asserts a full mapping end-to-end. (Member ids are
# NOT in this payload — the endpoint surfaces only the ``friendNum`` count —
# so ``member_ids`` / ``member_ids_list`` are exercised as None / [] on every
# record.)
WA_GROUP_RECORDS: list[dict[str, Any]] = [
    {
        "friendWxId": "120363000000000000@g.us",  # WA group id (not @chatroom)
        "friendWxNickname": "VIP WA Customer Group",
        "friendNum": 5,
        "friendHeadImageUrl": "https://wx.qlogo.cn/wa_group_001.png",
        "wxId": "8613800000001@s.whatsapp.net",  # owning WA staff account
        "ownerName": "Alice Wang",
        "userId": "wa_staff_001",
        "phone": "8613800000001",
        "wechatPhone": "8613900000001",
        "messageCount": 4521,
        "sendNum": 1204,
        "lastChatTime": 1700000000123,
        "version": "v1.20260811.waroom1",
    },
    {
        "friendWxId": "120363111111111111@g.us",
        "friendWxNickname": "East Region WA Sales",
        "friendNum": 8,
        "friendHeadImageUrl": "https://wx.qlogo.cn/wa_group_002.png",
        "wxId": "8613800000002@s.whatsapp.net",
        "ownerName": "Bob Chen",
        "userId": "wa_staff_002",
        "phone": "8613800000002",
        "wechatPhone": "8613900000002",
        "messageCount": 9821,
        "sendNum": 211,
        "lastChatTime": 1700000000456,
        "version": "v1.20260811.waroom2",
    },
    {
        # A group whose owner has no resolved staff id (userId None) — the
        # scraper must still yield it; None-safe fields stay None.
        "friendWxId": "120363222222222222@g.us",
        "friendWxNickname": "External WA Coord",
        "friendNum": 3,
        "friendHeadImageUrl": "https://wx.qlogo.cn/wa_group_003.png",
        "wxId": "8613800000004@s.whatsapp.net",
        "ownerName": "Orphan WA",
        "userId": None,
        "phone": None,
        "wechatPhone": None,
        "messageCount": 12,
        "sendNum": 0,
        "lastChatTime": 1700000000789,
        "version": "v1.20260811.waroom3",
    },
]

TOTAL = len(WA_GROUP_RECORDS)
DEFAULT_PAGE_SIZE = 2


def _primed_client() -> YunkeClient:
    """A YunkeClient already in a logged-in state (login flow skipped)."""
    return YunkeClient(base_url=BASE, userid=USERID, company=COMPANY)


# ---------------------------------------------------------------------------
# End-to-end: pagination + field mapping + channel override
# ---------------------------------------------------------------------------


@respx.mock
async def test_scrape_whatsapp_groups_yields_records_and_paginates():
    """Two full pages + a terminating empty page -> 3 records, 3 calls."""
    page1 = make_wa_friends_response(
        WA_GROUP_RECORDS[:2], total_count=TOTAL, page=1, page_size=DEFAULT_PAGE_SIZE
    )
    page2 = make_wa_friends_response(
        WA_GROUP_RECORDS[2:], total_count=TOTAL, page=2, page_size=DEFAULT_PAGE_SIZE
    )
    page3 = make_wa_friends_response(
        [], total_count=TOTAL, page=3, page_size=DEFAULT_PAGE_SIZE
    )

    route = respx.post(WA_FRIENDS_URL).mock(
        side_effect=[
            httpx.Response(200, json=page1),
            httpx.Response(200, json=page2),
            httpx.Response(200, json=page3),
        ]
    )

    client = _primed_client()
    try:
        results = [
            r async for r in scrape_whatsapp_groups(client, page_size=DEFAULT_PAGE_SIZE)
        ]
    finally:
        await client.aclose()

    # Pagination: exactly 3 calls (page1, page2, empty-page stop).
    assert route.call_count == 3

    # Exactly the 3 fixture records (not duplicated, not dropped).
    assert len(results) == 3
    assert {r["room_id"] for r in results} == {
        rec["friendWxId"] for rec in WA_GROUP_RECORDS
    }

    # Field mapping for each record (compare against the source record).
    for result, record in zip(results, WA_GROUP_RECORDS, strict=True):
        # Identity + channel override (whatsapp, NOT wechat).
        assert result["room_id"] == record["friendWxId"]
        assert result["channel"] == "whatsapp"

        # Naming + ownership.
        assert result["room_name"] == record["friendWxNickname"]
        assert result["owner_account_id"] == record["wxId"]
        assert result["owner_account_nickname"] == record["ownerName"]
        assert result["owner_user_id"] == record["userId"]
        # phone preferred, wechatPhone fallback.
        assert result["owner_user_phone"] == (
            record["phone"] or record["wechatPhone"]
        )

        # Counts.
        assert result["member_count"] == record["friendNum"]
        assert result["message_count"] == record["messageCount"]
        assert result["own_message_count"] == record["sendNum"]

        # Avatar + timestamps.
        assert result["head_image_url"] == record["friendHeadImageUrl"]
        assert result["last_chat_time"] == record["lastChatTime"]

        # Member details NOT surfaced by this endpoint -> None / [].
        assert result["member_ids"] is None
        assert result["member_ids_list"] == []
        # Fields the endpoint does not carry.
        assert result["loss_members"] is None
        assert result["add_members"] is None
        assert result["update_time"] is None

        # Version carried verbatim; raw_json preserves the original record.
        assert result["version"] == record["version"]
        assert result["raw_json"] == record


# ---------------------------------------------------------------------------
# member_ids behaviour: always None / [] (not surfaced by this endpoint)
# ---------------------------------------------------------------------------


@respx.mock
async def test_scrape_whatsapp_groups_emits_empty_member_ids():
    """The endpoint does not surface member ids; they are always
    ``None`` / ``[]`` on yielded records (member mirroring deferred)."""
    record = dict(WA_GROUP_RECORDS[0])
    page1 = make_wa_friends_response([record], total_count=1, page=1)
    page2 = make_wa_friends_response([], total_count=1, page=2)
    respx.post(WA_FRIENDS_URL).mock(
        side_effect=[httpx.Response(200, json=page1), httpx.Response(200, json=page2)]
    )

    client = _primed_client()
    try:
        results = [
            r async for r in scrape_whatsapp_groups(client, page_size=DEFAULT_PAGE_SIZE)
        ]
    finally:
        await client.aclose()

    assert len(results) == 1
    assert results[0]["member_ids"] is None
    assert results[0]["member_ids_list"] == []


# ---------------------------------------------------------------------------
# Pagination body: page/pageSize advanced + type="1" (UNVERIFIED group switch)
# ---------------------------------------------------------------------------


@respx.mock
async def test_scrape_whatsapp_groups_sends_pagination_body():
    """Outgoing body carries page/pageSize, departmentId, and ``type="1"``.

    The ``type="1"`` group switch is UNVERIFIED (see scraper docstring); this
    test pins the current choice so a future post-risk-control adjustment is
    surfaced as a deliberate test update, not a silent regression.
    """
    page1 = make_wa_friends_response(
        [WA_GROUP_RECORDS[0]], total_count=TOTAL, page=1, page_size=1
    )
    page2 = make_wa_friends_response([], total_count=TOTAL, page=2, page_size=1)
    route = respx.post(WA_FRIENDS_URL).mock(
        side_effect=[httpx.Response(200, json=page1), httpx.Response(200, json=page2)]
    )

    client = _primed_client()
    try:
        results = [
            r
            async for r in scrape_whatsapp_groups(
                client, department_id="ROOT_DEPT", page_size=1
            )
        ]
    finally:
        await client.aclose()

    # One record on page 1, empty page 2 stops the loop.
    assert len(results) == 1
    assert route.call_count == 2

    body1 = _json.loads(route.calls[0].request.content.decode())
    # businessFriendList uses `page` (not pageNum) + departmentId + type.
    assert body1["page"] == 1
    assert body1["pageSize"] == 1
    assert body1["departmentId"] == "ROOT_DEPT"
    # The crucial (UNVERIFIED) switch: type="1" selects GROUPS ("0" = friends).
    assert body1["type"] == "1"

    body2 = _json.loads(route.calls[1].request.content.decode())
    assert body2["page"] == 2
    assert body2["pageSize"] == 1
    assert body2["type"] == "1"


# ---------------------------------------------------------------------------
# Empty first page -> no yields, single call
# ---------------------------------------------------------------------------


@respx.mock
async def test_scrape_whatsapp_groups_stops_on_empty_first_page():
    """If the very first page is empty, scraper stops without over-fetching."""
    empty = make_wa_friends_response([], total_count=0, page=1)
    route = respx.post(WA_FRIENDS_URL).mock(
        return_value=httpx.Response(200, json=empty)
    )

    client = _primed_client()
    try:
        results = [r async for r in scrape_whatsapp_groups(client)]
    finally:
        await client.aclose()

    assert results == []
    assert route.call_count == 1