"""Tests for GET /api/messages — chat timeline.

Seeds 3 messages (2 for talker t_a across times 1000/3000, 1 for talker t_b at
2000) and asserts filters (channel, owner, talker, time window) + ordering
(``timestamp asc``) + pagination.
"""

from __future__ import annotations

from sqlalchemy.ext.asyncio import AsyncSession

from app.db.models import Message


async def _seed(session: AsyncSession) -> None:
    session.add_all(
        [
            Message(
                msg_id="m1",
                channel="wechat",
                owner_account_id="wx_owner_1",
                talker_id="t_a",
                room_id=None,
                text="hello",
                timestamp=1000,
                is_send=True,
                type="text",
                type_raw=1,
            ),
            Message(
                msg_id="m2",
                channel="wechat",
                owner_account_id="wx_owner_1",
                talker_id="t_b",
                room_id=None,
                text="hi",
                timestamp=2000,
                is_send=False,
                type="text",
                type_raw=1,
            ),
            Message(
                msg_id="m3",
                channel="wechat",
                owner_account_id="wx_owner_1",
                talker_id="t_a",
                room_id=None,
                text="bye",
                timestamp=3000,
                is_send=True,
                type="text",
                type_raw=1,
            ),
        ]
    )
    await session.commit()


async def test_default_page_returns_all_ordered_asc(make_client):
    """No filters -> 3 rows ordered by ``timestamp asc`` (timeline order)."""
    client = await make_client(_seed)
    r = await client.get("/api/messages")
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 3
    assert len(body["items"]) == 3
    assert [it["msg_id"] for it in body["items"]] == ["m1", "m2", "m3"]
    for key in (
        "msg_id",
        "channel",
        "owner_account_id",
        "talker_id",
        "room_id",
        "is_send",
        "type",
        "type_raw",
        "text",
        "file_url",
        "sender_name",
        "sender_head_url",
        "timestamp",
        "raw_json",
    ):
        assert key in body["items"][0]


async def test_raw_json_serializes_verbatim(make_client):
    """``raw_json`` round-trips the verbatim upstream message record.

    The seeded messages omit ``raw_json`` (NULL); this test seeds one with a
    populated blob and asserts every camelCase key is preserved verbatim while
    the existing rows still serialize as ``null``.
    """

    async def seed(session: AsyncSession) -> None:
        await _seed(session)
        session.add(
            Message(
                msg_id="m_raw",
                channel="wechat",
                owner_account_id="wx_owner_1",
                talker_id="t_a",
                room_id=None,
                type="image",
                type_raw=3,
                timestamp=5000,
                raw_json={
                    "msgSvrId": "m_raw",
                    "type": 3,
                    "file": "https://oss/full.jpg",
                    "fileTh": "https://oss/th.jpg",
                    "fileHd": "https://oss/hd.jpg",
                    "md5": "abc123",
                    "md5Th": "th123",
                    "md5Hd": "hd123",
                    "duration": 0,
                    "talker": "t_a",
                    "oriTalker": "t_a",
                    "name": "Alice",
                    "headUrl": "https://oss/alice.jpg",
                    "wechatId": "wx_owner_1",
                    "roomid": "",
                    "isSend": 1,
                    "paymsgid": "",
                    "referMsg": {"text": "原文"},
                },
            )
        )
        await session.commit()

    client = await make_client(seed)
    r = await client.get("/api/messages", params={"talker_id": "t_a"})
    assert r.status_code == 200
    by_id = {it["msg_id"]: it for it in r.json()["items"]}

    raw = by_id["m_raw"]["raw_json"]
    assert raw == {
        "msgSvrId": "m_raw",
        "type": 3,
        "file": "https://oss/full.jpg",
        "fileTh": "https://oss/th.jpg",
        "fileHd": "https://oss/hd.jpg",
        "md5": "abc123",
        "md5Th": "th123",
        "md5Hd": "hd123",
        "duration": 0,
        "talker": "t_a",
        "oriTalker": "t_a",
        "name": "Alice",
        "headUrl": "https://oss/alice.jpg",
        "wechatId": "wx_owner_1",
        "roomid": "",
        "isSend": 1,
        "paymsgid": "",
        "referMsg": {"text": "原文"},
    }

    # Seeded messages without raw_json serialize as JSON null.
    assert by_id["m1"]["raw_json"] is None


async def test_filter_by_talker_id(make_client):
    """``?talker_id=t_a`` -> 2 messages for that 1:1 conversation."""
    client = await make_client(_seed)
    r = await client.get("/api/messages", params={"talker_id": "t_a"})
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 2
    assert {it["msg_id"] for it in body["items"]} == {"m1", "m3"}


async def test_filter_by_owner_account_id(make_client):
    """``?owner_account_id=wx_owner_1`` -> all 3 (all owned by this account)."""
    client = await make_client(_seed)
    r = await client.get("/api/messages", params={"owner_account_id": "wx_owner_1"})
    assert r.status_code == 200
    assert r.json()["total"] == 3


async def test_filter_by_owner_account_id_no_match(make_client):
    """A non-existent owner account -> 0 rows."""
    client = await make_client(_seed)
    r = await client.get("/api/messages", params={"owner_account_id": "nobody"})
    assert r.status_code == 200
    assert r.json()["total"] == 0


async def test_time_window_filter(make_client):
    """``?start=1500&end=2500`` -> only m2 (timestamp 2000)."""
    client = await make_client(_seed)
    r = await client.get(
        "/api/messages", params={"start": 1500, "end": 2500}
    )
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 1
    assert body["items"][0]["msg_id"] == "m2"


async def test_time_window_combined_with_talker(make_client):
    """``talker_id=t_a & start=1500`` -> only m3 (t_a's later message)."""
    client = await make_client(_seed)
    r = await client.get(
        "/api/messages", params={"talker_id": "t_a", "start": 1500}
    )
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 1
    assert body["items"][0]["msg_id"] == "m3"


async def test_channel_filter(make_client):
    """``?channel=whatsapp`` -> 0 (all seeded are wechat)."""
    client = await make_client(_seed)
    r = await client.get("/api/messages", params={"channel": "whatsapp"})
    assert r.status_code == 200
    assert r.json()["total"] == 0


async def test_pagination_page_size_one(make_client):
    """``page_size=1&page=1`` -> 1 item, total still 3; page 2 -> next item."""
    client = await make_client(_seed)
    r1 = await client.get(
        "/api/messages", params={"page": 1, "page_size": 1}
    )
    b1 = r1.json()
    assert b1["total"] == 3
    assert len(b1["items"]) == 1
    assert b1["items"][0]["msg_id"] == "m1"

    r2 = await client.get(
        "/api/messages", params={"page": 2, "page_size": 1}
    )
    b2 = r2.json()
    assert len(b2["items"]) == 1
    assert b2["items"][0]["msg_id"] == "m2"


async def test_group_chat_filter_by_room_id(make_client):
    """``?room_id=room_x`` -> only the group message."""
    async def seed(session: AsyncSession) -> None:
        await _seed(session)
        session.add(
            Message(
                msg_id="m4",
                channel="wechat",
                owner_account_id="wx_owner_1",
                talker_id=None,
                room_id="room_x",
                text="group hi",
                timestamp=4000,
                type="text",
                type_raw=1,
            )
        )
        await session.commit()

    client = await make_client(seed)
    r = await client.get("/api/messages", params={"room_id": "room_x"})
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 1
    assert body["items"][0]["msg_id"] == "m4"


async def test_media_fields_serialize(make_client):
    """Image thumbnail/HD URLs, voice duration/transcription, md5, room_id and
    sender avatar round-trip through MessageOut so the timeline can render
    media + group messages without a second call.
    """

    async def seed(session: AsyncSession) -> None:
        session.add_all(
            [
                Message(
                    msg_id="img1",
                    channel="wechat",
                    owner_account_id="wx_owner_1",
                    talker_id="t_a",
                    room_id=None,
                    type="image",
                    type_raw=3,
                    timestamp=1000,
                    file_url="https://oss/full.jpg",
                    file_th_url="https://oss/th.jpg",
                    file_hd_url="https://oss/hd.jpg",
                    md5="abc123",
                    sender_name="Alice",
                    sender_head_url="https://oss/alice.jpg",
                ),
                Message(
                    msg_id="voice1",
                    channel="wechat",
                    owner_account_id="wx_owner_1",
                    talker_id=None,
                    room_id="room_x",
                    type="voice",
                    type_raw=34,
                    timestamp=2000,
                    duration=12,
                    transcription_text="hello there",
                    sender_name="Bob",
                    sender_head_url="https://oss/bob.jpg",
                ),
            ]
        )
        await session.commit()

    client = await make_client(seed)
    r = await client.get("/api/messages", params={"owner_account_id": "wx_owner_1"})
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 2
    by_id = {it["msg_id"]: it for it in body["items"]}

    img = by_id["img1"]
    assert img["file_th_url"] == "https://oss/th.jpg"
    assert img["file_hd_url"] == "https://oss/hd.jpg"
    assert img["md5"] == "abc123"
    assert img["room_id"] is None
    assert img["sender_head_url"] == "https://oss/alice.jpg"

    voice = by_id["voice1"]
    assert voice["duration"] == 12
    assert voice["transcription_text"] == "hello there"
    assert voice["room_id"] == "room_x"
    assert voice["sender_head_url"] == "https://oss/bob.jpg"


async def test_media_fields_default_none_when_unset(make_client):
    """A text message with no media columns set serializes the new keys as None."""

    async def seed(session: AsyncSession) -> None:
        session.add(
            Message(
                msg_id="t1",
                channel="wechat",
                owner_account_id="wx_owner_1",
                talker_id="t_a",
                type="text",
                type_raw=1,
                timestamp=1000,
                text="plain",
            )
        )
        await session.commit()

    client = await make_client(seed)
    r = await client.get("/api/messages")
    assert r.status_code == 200
    it = r.json()["items"][0]
    for key in (
        "file_th_url",
        "file_hd_url",
        "duration",
        "transcription_text",
        "md5",
        "room_id",
        "sender_head_url",
    ):
        assert key in it
        assert it[key] is None


# ---------------------------------------------------------------------------
# msg_type / q 过滤(Task 4: 类型归一化扩展 + API 过滤, 对齐云客 10 类下拉)
# ---------------------------------------------------------------------------


async def _seed_types(session: AsyncSession) -> None:
    """text / image / image_legacy / red_packet / transfer 各一条 + 关键词行。"""
    session.add_all(
        [
            Message(
                msg_id="ty_text", channel="wechat", owner_account_id="wx_owner_1",
                talker_id="t_a", text="报价 135800 元", timestamp=1000, is_send=True,
                type="text", type_raw=1,
            ),
            Message(
                msg_id="ty_img", channel="wechat", owner_account_id="wx_owner_1",
                talker_id="t_a", text="", timestamp=2000, is_send=False,
                type="image", type_raw=2,
            ),
            Message(
                msg_id="ty_img_legacy", channel="wechat", owner_account_id="wx_owner_1",
                talker_id="t_a", text="", timestamp=2500, is_send=False,
                type="image_legacy", type_raw=3,
            ),
            Message(
                msg_id="ty_red", channel="wechat", owner_account_id="wx_owner_1",
                talker_id="t_a", text="", timestamp=3000, is_send=True,
                type="red_packet", type_raw=5,
            ),
            Message(
                msg_id="ty_transfer", channel="wechat", owner_account_id="wx_owner_1",
                talker_id="t_a", text="发送转账：￥100.00", timestamp=4000, is_send=True,
                type="transfer", type_raw=11,
            ),
            Message(
                msg_id="ty_text_2", channel="wechat", owner_account_id="wx_owner_1",
                talker_id="t_a", text="含 100% 通配符字面量", timestamp=5000, is_send=True,
                type="text", type_raw=1,
            ),
        ]
    )
    await session.commit()


async def test_msg_type_filter_text(make_client):
    client = await make_client(_seed_types)
    r = await client.get("/api/messages", params={"msg_type": "text"})
    assert r.status_code == 200
    body = r.json()
    assert {it["msg_id"] for it in body["items"]} == {"ty_text", "ty_text_2"}


async def test_msg_type_filter_image_includes_legacy(make_client):
    """msg_type=image 覆盖 image + image_legacy(过渡期兼容)。"""
    client = await make_client(_seed_types)
    r = await client.get("/api/messages", params={"msg_type": "image"})
    assert r.status_code == 200
    body = r.json()
    assert {it["msg_id"] for it in body["items"]} == {"ty_img", "ty_img_legacy"}


async def test_msg_type_filter_red_packet_only(make_client):
    client = await make_client(_seed_types)
    r = await client.get("/api/messages", params={"msg_type": "red_packet"})
    assert r.status_code == 200
    body = r.json()
    assert [it["msg_id"] for it in body["items"]] == ["ty_red"]
    assert body["total"] == 1


async def test_msg_type_filter_no_rows_returns_empty(make_client):
    """voice_call 等暂无样本类型: 过滤语法有效, 查空是数据现实。"""
    client = await make_client(_seed_types)
    r = await client.get("/api/messages", params={"msg_type": "voice_call"})
    assert r.status_code == 200
    body = r.json()
    assert body["items"] == []
    assert body["total"] == 0


async def test_msg_type_unknown_rejected_422(make_client):
    client = await make_client(_seed_types)
    r = await client.get("/api/messages", params={"msg_type": "bogus"})
    assert r.status_code == 422


async def test_q_substring_filter(make_client):
    client = await make_client(_seed_types)
    r = await client.get("/api/messages", params={"q": "报价"})
    assert r.status_code == 200
    body = r.json()
    assert [it["msg_id"] for it in body["items"]] == ["ty_text"]
    assert body["total"] == 1


async def test_q_escapes_like_wildcards(make_client):
    """q 里的 %/_ 按字面匹配, 不当通配符。"""
    client = await make_client(_seed_types)
    r = await client.get("/api/messages", params={"q": "100%"})
    assert r.status_code == 200
    body = r.json()
    # 只命中字面含 "100%" 的行; 不因 % 通配漏扩到 "￥100.00" 之外的行
    assert [it["msg_id"] for it in body["items"]] == ["ty_text_2"]
    r2 = await client.get("/api/messages", params={"q": "100"})
    ids2 = {it["msg_id"] for it in r2.json()["items"]}
    assert ids2 == {"ty_transfer", "ty_text_2"}


async def test_msg_type_and_q_combine(make_client):
    client = await make_client(_seed_types)
    r = await client.get("/api/messages", params={"msg_type": "transfer", "q": "转账"})
    assert r.status_code == 200
    body = r.json()
    assert [it["msg_id"] for it in body["items"]] == ["ty_transfer"]


# ---------------------------------------------------------------------------
# order=desc + before_ts/before_id 游标(2026-09-07 深分页超时修复:
# 大对话 ASC 末页 OFFSET 数万行逐条回表 2.5s+,群聊 filesoort 10s+ 撞前端
# 15s 超时 ECONNABORTED。DESC 首页+游标上翻每页恒 O(page_size))
# ---------------------------------------------------------------------------


async def _seed_desc(session: AsyncSession) -> None:
    """t_a 会话 5 条,含两组同 timestamp 平手——验证 (timestamp, msg_id) 全序。

    ASC 全序 = a1,a2,a3,a4,a5;DESC 全序 = a5,a4,a3,a2,a1。
    """
    rows = [("a1", 1000), ("a2", 1000), ("a3", 2000), ("a4", 3000), ("a5", 3000)]
    session.add_all(
        [
            Message(
                msg_id=mid,
                channel="wechat",
                owner_account_id="wx_owner_1",
                talker_id="t_a",
                type="text",
                type_raw=1,
                is_send=True,
                timestamp=ts,
            )
            for mid, ts in rows
        ]
    )
    await session.commit()


async def test_order_desc_returns_newest_first(make_client):
    """order=desc → 按 (timestamp, msg_id) 降序,平手时 msg_id 大者在前。"""
    client = await make_client(_seed_desc)
    r = await client.get(
        "/api/messages", params={"talker_id": "t_a", "order": "desc"}
    )
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 5
    assert [it["msg_id"] for it in body["items"]] == ["a5", "a4", "a3", "a2", "a1"]


async def test_order_desc_pagination_from_newest(make_client):
    """desc 的 page 从最新端数:page1=最新 slice(前端首屏即此页)。"""
    client = await make_client(_seed_desc)
    r1 = await client.get(
        "/api/messages",
        params={"talker_id": "t_a", "order": "desc", "page": 1, "page_size": 2},
    )
    assert [it["msg_id"] for it in r1.json()["items"]] == ["a5", "a4"]
    r2 = await client.get(
        "/api/messages",
        params={"talker_id": "t_a", "order": "desc", "page": 2, "page_size": 2},
    )
    assert [it["msg_id"] for it in r2.json()["items"]] == ["a3", "a2"]


async def test_order_invalid_rejected_422(make_client):
    client = await make_client(_seed_desc)
    r = await client.get("/api/messages", params={"order": "bogus"})
    assert r.status_code == 422


async def test_before_cursor_returns_preceding_slice(make_client):
    """before=(3000,a4) → 严格早于该游标的消息按 desc 取,平手边界不含游标本行。"""
    client = await make_client(_seed_desc)
    r = await client.get(
        "/api/messages",
        params={
            "talker_id": "t_a",
            "order": "desc",
            "page_size": 2,
            "before_ts": 3000,
            "before_id": "a4",
        },
    )
    assert r.status_code == 200
    body = r.json()
    # 游标后剩余 a1/a2/a3;desc 前 2 条
    assert [it["msg_id"] for it in body["items"]] == ["a3", "a2"]
    assert body["total"] == 3


async def test_before_cursor_tie_boundary_exclusive(make_client):
    """before=(3000,a5):同 ts=3000 的 a4 因 msg_id<a5 仍在界内。"""
    client = await make_client(_seed_desc)
    r = await client.get(
        "/api/messages",
        params={"talker_id": "t_a", "order": "desc", "before_ts": 3000, "before_id": "a5"},
    )
    body = r.json()
    assert [it["msg_id"] for it in body["items"]] == ["a4", "a3", "a2", "a1"]
    assert body["total"] == 4


async def test_before_requires_both_params_422(make_client):
    """游标两参必须成对:单传任一 422,防止静默忽略半个游标查错页。"""
    client = await make_client(_seed_desc)
    r1 = await client.get("/api/messages", params={"before_ts": 3000})
    assert r1.status_code == 422
    r2 = await client.get("/api/messages", params={"before_id": "a5"})
    assert r2.status_code == 422


async def test_before_cursor_with_window_filter(make_client):
    """游标与 start/end 过滤叠加(loadOlder 带日期窗场景)。"""
    client = await make_client(_seed_desc)
    r = await client.get(
        "/api/messages",
        params={"talker_id": "t_a", "order": "desc", "start": 1500},
    )
    assert [it["msg_id"] for it in r.json()["items"]] == ["a5", "a4", "a3"]
    r2 = await client.get(
        "/api/messages",
        params={
            "talker_id": "t_a",
            "order": "desc",
            "start": 1500,
            "before_ts": 2000,
            "before_id": "a3",
        },
    )
    body = r2.json()
    assert body["items"] == []
    assert body["total"] == 0


async def test_load_older_flow_reproduces_full_asc_order(make_client):
    """前端新流程端到端不变式:desc 首页反转 + 逐游标上翻反转,拼接 = 全量 ASC。

    这正是 ChatMain/ChatTimeline 的首屏+「加载更多」序列——顺序若与旧
    ASC 分页不一致,时间线就会错乱。
    """
    client = await make_client(_seed_desc)
    page_size = 2

    async def fetch(**extra):
        r = await client.get(
            "/api/messages",
            params={"talker_id": "t_a", "order": "desc", "page_size": page_size, **extra},
        )
        assert r.status_code == 200
        return r.json()

    displayed: list[str] = []
    body = await fetch()
    # 会话总数以首屏(无游标)响应为准;游标响应的 total 是「游标后剩余数」
    conv_total = body["total"]
    displayed = [it["msg_id"] for it in body["items"][::-1]]
    while len(displayed) < conv_total:
        oldest = body["items"][-1]
        body = await fetch(before_ts=oldest["timestamp"], before_id=oldest["msg_id"])
        assert body["items"], "游标还未走完 total 就断了"
        displayed = [it["msg_id"] for it in body["items"][::-1]] + displayed

    assert displayed == ["a1", "a2", "a3", "a4", "a5"]