import { describe, expect, it, vi } from 'vitest';
import { protobuf_encode } from '@snowluma/proton';
import { parseMsgPush, MSG_PUSH_CMD } from '@snowluma/protocol/msg-push';
import { IdentityService } from '@snowluma/protocol/identity-service';
import { GroupInviteTracker } from '@snowluma/protocol/group-invite-tracker';
import { IncomingPacketPipeline } from '@snowluma/protocol/packet-pipeline';
import { BridgeEventBus } from '@snowluma/protocol/event-bus';
import type { GroupMemberInfo, QQGroupInfo } from '@snowluma/protocol/qq-info';
// Proton's call-site analyzer keys off the literal type identifier
// printed in `protobuf_encode<X>` — it walks imports by *original*
// name (not alias). If both `import { X } from 'proto/notify'` and
// `import { X as Y } from 'events'` appear, the analyzer's import
// resolver picks up the second one and the proton-side definition
// loses, so call sites referencing `X` go un-replaced. Side-step by
// re-aliasing the event-side type's *source* (not just the local
// name) — we don't need to import it directly since assertions can
// inline-extract the kind.
import type {
    GroupChange,
    NewFriend,
    FriendRecall,
    OperatorInfo,
    SelfJoinInGroup,
    GroupAdmin,
    InputStatusNotify,
    NotifyMessageBody,
    GroupNameChange,
    GroupSpecialTitleChange,
    OnlineDeviceNotify,
    ProfileLikeTip,
    FriendRemarkChangedNotify,
} from '@snowluma/proto-defs/notify';
import type { PushMsg } from '@snowluma/proto-defs/message';
import type { GroupMemberJoin, FriendAddEvent, QQEventVariant } from '@snowluma/protocol/events';

// Local alias for the event-side recall type — derived via Extract so
// we avoid an `import { FriendRecall as X }` that collides with the
// proton import above.
type FriendRecallEvent = Extract<QQEventVariant, { kind: 'friend_recall' }>;
type GroupAdminEvent = Extract<QQEventVariant, { kind: 'group_admin' }>;
import type { PacketInfo } from '@snowluma/common/protocol-types';
import { subscribeLogs } from '@snowluma/common/logger';

const SELF_UIN = '10001';
const GROUP_ID = 123456789;

function makeGroupMember(uin: number, uid: string): GroupMemberInfo {
    return {
        uin,
        uid,
        nickname: '',
        card: '',
        isRobot: false,
        role: 'member',
        level: 0,
        title: '',
        joinTime: 0,
        lastSentTime: 0,
        shutUpTime: 0,
    };
}

function makeGroup(members: GroupMemberInfo[] = []): QQGroupInfo {
    return {
        groupId: GROUP_ID,
        groupName: '',
        remark: '',
        memberCount: members.length,
        memberMax: 500,
        members: new Map(members.map((member) => [member.uin, member])),
    };
}

function makeIdentity(members: GroupMemberInfo[] = []): IdentityService {
    const identity = IdentityService.memory(SELF_UIN);
    identity.rememberGroups([makeGroup(members)]);

    if (members.length) {
        identity.rememberGroupMembers(GROUP_ID, members);
    }

    return identity;
}

function makeGroupIncreasePacket(
    memberUid: string,
    operatorUid = '',
    fromUin = GROUP_ID,
    operatorBytes: Uint8Array = Buffer.from(operatorUid, 'utf8'),
    operationType = 130,
): PacketInfo {
    const content = protobuf_encode<GroupChange>({
        groupUin: GROUP_ID,
        memberUid,
        decreaseType: operationType,
        operatorBytes,
    });
    const body = protobuf_encode<PushMsg>({
        message: {
            responseHead: { fromUin },
            contentHead: { msgType: 33, timestamp: 1710000000 },
            body: { msgContent: content },
        },
        status: 0,
    });

    return {
        pid: 1,
        uin: SELF_UIN,
        serviceCmd: MSG_PUSH_CMD,
        seqId: 1,
        retCode: 0,
        fromClient: false,
        body,
    };
}

function makeGroupDecreasePacket(
    memberUid: string,
    decreaseType: number,
    operatorBytes: Uint8Array,
    fromUin = GROUP_ID,
): PacketInfo {
    const content = protobuf_encode<GroupChange>({
        groupUin: GROUP_ID,
        memberUid,
        decreaseType,
        operatorBytes,
    });
    const body = protobuf_encode<PushMsg>({
        message: {
            responseHead: { fromUin },
            contentHead: { msgType: 34, timestamp: 1710000000 },
            body: { msgContent: content },
        },
        status: 0,
    });

    return {
        pid: 1,
        uin: SELF_UIN,
        serviceCmd: MSG_PUSH_CMD,
        seqId: 1,
        retCode: 0,
        fromClient: false,
        body,
    };
}

function makeNestedOperatorInfoFixture(): Uint8Array {
    // QQ may wrap GroupChange.operatorBytes in OperatorInfo and append metadata
    // after the UID, including for GroupChange.decreaseType=131.
    return Buffer.from('0a180a0a755f6f70657261746f7210061a060102030405062001', 'hex');
}

describe('parseMsgPush group member increase', () => {
    it('does not fall back to the group id when a joining uid is unresolved', () => {
        const [event] = parseMsgPush(
            makeGroupIncreasePacket('u_new_member'),
            makeIdentity(),
        ) as GroupMemberJoin[];

        expect(event.kind).toBe('group_member_join');
        expect(event.groupId).toBe(GROUP_ID);
        expect(event.userUin).toBe(0);
        expect(event.operatorUin).toBe(0);
        expect(event.userUid).toBe('u_new_member');
    });

    it('decodes the raw operator uid used by member-increase pushes (#228)', () => {
        const member = makeGroupMember(22222, 'u_member');
        const operator = makeGroupMember(33333, 'u_operator');
        const [event] = parseMsgPush(
            makeGroupIncreasePacket(member.uid, operator.uid),
            makeIdentity([member, operator]),
        ) as GroupMemberJoin[];

        expect(event.userUin).toBe(member.uin);
        expect(event.operatorUin).toBe(operator.uin);
        expect(event.userUid).toBe(member.uid);
        expect(event.operatorUid).toBe(operator.uid);
    });

    it('decodes nested operator info used by member-increase pushes', () => {
        const member = makeGroupMember(22222, 'u_member');
        const operator = makeGroupMember(33333, 'u_operator');
        const [event] = parseMsgPush(
            makeGroupIncreasePacket(member.uid, '', GROUP_ID, makeNestedOperatorInfoFixture()),
            makeIdentity([member, operator]),
        ) as GroupMemberJoin[];

        expect(event.userUin).toBe(member.uin);
        expect(event.operatorUin).toBe(operator.uin);
        expect(event.userUid).toBe(member.uid);
        expect(event.operatorUid).toBe(operator.uid);
    });

    it('derives approve vs invite from the member-change operation code (#237)', () => {
        const member = makeGroupMember(22222, 'u_member');
        const operator = makeGroupMember(33333, 'u_operator');
        const identity = makeIdentity([member, operator]);

        const [approved] = parseMsgPush(
            makeGroupIncreasePacket(
                member.uid,
                operator.uid,
                GROUP_ID,
                Buffer.from(operator.uid, 'utf8'),
                130,
            ),
            identity,
        ) as GroupMemberJoin[];
        const [invited] = parseMsgPush(
            makeGroupIncreasePacket(
                member.uid,
                operator.uid,
                GROUP_ID,
                Buffer.from(operator.uid, 'utf8'),
                131,
            ),
            identity,
        ) as GroupMemberJoin[];
        const [unknownHighBits] = parseMsgPush(
            makeGroupIncreasePacket(
                member.uid,
                operator.uid,
                GROUP_ID,
                Buffer.from(operator.uid, 'utf8'),
                0x103,
            ),
            identity,
        ) as GroupMemberJoin[];

        expect(approved.joinType).toBe('approve');
        expect(invited.joinType).toBe('invite');
        expect(unknownHighBits.joinType).toBe('approve');
    });

    it('reports malformed raw operator bytes with bounded context', () => {
        const captured: string[] = [];
        const unsubscribe = subscribeLogs((entry) => {
            if (entry.scope === 'MsgPush') {
                captured.push(entry.message);
            }
        });

        try {
            const events = parseMsgPush(
                makeGroupIncreasePacket('u_new_member', '', GROUP_ID, new Uint8Array([0xff])),
                makeIdentity(),
            );

            expect(events).toEqual([]);
            expect(
                captured.some(
                    (message) =>
                        message.includes('group member increase operator UID') &&
                        message.includes('bytes=1') &&
                        message.includes('preview=ff'),
                ),
            ).toBe(true);
        } finally {
            unsubscribe();
        }
    });
});

describe('parseMsgPush group member decrease', () => {
    it('ignores structured field 5 metadata for a voluntary leave (#237)', () => {
        const member = makeGroupMember(22222, 'u_member');
        const [event] = parseMsgPush(
            makeGroupDecreasePacket(member.uid, 130, new Uint8Array([0x12, 0x02, 0x08, 0x00])),
            makeIdentity([member]),
        ) as Extract<QQEventVariant, { kind: 'group_member_leave' }>[];

        expect(event.leaveType).toBe('leave');
        expect(event.userUin).toBe(member.uin);
        expect(event.operatorUin).toBe(member.uin);
        expect(event.operatorUid).toBe(member.uid);
    });

    it('decodes a raw operator uid for ordinary member removals', () => {
        const member = makeGroupMember(22222, 'u_member');
        const operator = makeGroupMember(33333, 'u_operator');
        const [event] = parseMsgPush(
            makeGroupDecreasePacket(member.uid, 131, Buffer.from(operator.uid, 'utf8')),
            makeIdentity([member, operator]),
        ) as Extract<QQEventVariant, { kind: 'group_member_leave' }>[];

        expect(event.userUin).toBe(member.uin);
        expect(event.operatorUin).toBe(operator.uin);
        expect(event.operatorUid).toBe(operator.uid);
        expect(event.leaveType).toBe('kick');
    });

    it('decodes nested operator info for ordinary member removals (#253)', () => {
        const member = makeGroupMember(22222, 'u_member');
        const operator = makeGroupMember(33333, 'u_operator');
        const [event] = parseMsgPush(
            makeGroupDecreasePacket(member.uid, 131, makeNestedOperatorInfoFixture()),
            makeIdentity([member, operator]),
        ) as Extract<QQEventVariant, { kind: 'group_member_leave' }>[];

        expect(event.userUin).toBe(member.uin);
        expect(event.operatorUin).toBe(operator.uin);
        expect(event.operatorUid).toBe(operator.uid);
        expect(event.leaveType).toBe('kick');
    });

    it('decodes nested operator info when the bot itself is kicked', () => {
        const operator = makeGroupMember(33333, 'u_operator');
        const operatorBytes = protobuf_encode<OperatorInfo>({
            operatorField: { uid: operator.uid },
        });
        const [event] = parseMsgPush(
            makeGroupDecreasePacket('u_self', 3, operatorBytes),
            makeIdentity([operator]),
        ) as Extract<QQEventVariant, { kind: 'group_member_leave' }>[];

        expect(event.operatorUin).toBe(operator.uin);
        expect(event.operatorUid).toBe(operator.uid);
        expect(event.leaveType).toBe('kick');
    });
});

describe('parseMsgPush Event0x210 subType=38 (acknowledged-but-silent)', () => {
    // Tracked back to the stock-QQ-android decompiled decoder
    // `com.tencent.imcore.message.ext.codec.decoder.msgType0x210.SubType0x26`
    // — it's the QQ-client-internal "troop shortcut bar" / discussion
    // app state push (badge counts + in-app tips), not a chat event.
    // We acknowledge it via `Event0x210SubType.GroupAppStatePush` and
    // drop silently — no OneBot-level event, and — critically —
    // **no** "unknown subType=38" fallback log spam anymore.
    function makeEvent0x210Packet(subType: number, content = new Uint8Array(0)): PacketInfo {
        const body = protobuf_encode<PushMsg>({
            message: {
                responseHead: { fromUin: 22222, type: 0, sigMap: 0 },
                // 528 = Event0x210
                contentHead: { msgType: 528, subType, timestamp: 1710000000 },
                body: { msgContent: content },
            },
            status: 0,
        });
        return {
            pid: 1,
            uin: SELF_UIN,
            serviceCmd: MSG_PUSH_CMD,
            seqId: 1,
            retCode: 0,
            fromClient: false,
            body,
        };
    }

    it('returns [] for subType 38 without falling through to the MsgPush.Unknown log', () => {
        const captured: string[] = [];
        const unsubscribe = subscribeLogs((entry) => {
            // Only care about the spam that the prior implementation produced
            // ("MsgPush.Unknown" with subType=38). Other modules log freely
            // during identity setup etc., we ignore them.
            if (entry.scope === 'MsgPush.Unknown' && /subType=38/.test(entry.message)) {
                captured.push(entry.message);
            }
        });

        try {
            const events = parseMsgPush(makeEvent0x210Packet(38), makeIdentity());
            expect(events).toEqual([]);
            expect(captured).toEqual([]); // no "unknown subType=38" debug log
        } finally {
            unsubscribe();
        }
    });

    it('still flags genuinely-unknown subTypes via MsgPush.Unknown (regression guard)', () => {
        // Counterpart to the silent-on-38 case: anything we *haven't*
        // claimed in the enum should still hit the fallback so it's
        // visible to whoever's tailing debug logs.
        const captured: string[] = [];
        const unsubscribe = subscribeLogs((entry) => {
            if (entry.scope === 'MsgPush.Unknown' && /subType=999/.test(entry.message)) {
                captured.push(entry.message);
            }
        });

        try {
            parseMsgPush(makeEvent0x210Packet(999), makeIdentity());
            expect(captured.length).toBeGreaterThan(0);
        } finally {
            unsubscribe();
        }
    });
});

// ── P1 coverage extension: subTypes confirmed by LagrangeGo / acidify
//    that we were previously dropping into the "unknown" fallback. ──

function makeEvent0x210PacketAny(subType: number, content: Uint8Array): PacketInfo {
    const body = protobuf_encode<PushMsg>({
        message: {
            responseHead: { fromUin: 22222, type: 0, sigMap: 0 },
            contentHead: { msgType: 528, subType, timestamp: 1710000000 },
            body: { msgContent: content },
        },
        status: 0,
    });
    return {
        pid: 1,
        uin: SELF_UIN,
        serviceCmd: MSG_PUSH_CMD,
        seqId: 1,
        retCode: 0,
        fromClient: false,
        body,
    };
}

describe('parseMsgPush Event0x210 subType=179/226 (NewFriend → friend_add)', () => {
    // 179 fires when bot sent a request and other side accepted; 226
    // when bot accepted other side's request. Both share the
    // `NewFriend` wire shape (LagrangeGo registers both via
    // case-fallthrough in `client/listener.go:248`). We surface them
    // identically as `kind: 'friend_add'`.

    function makeNewFriendPacket(
        subType: 179 | 226,
        friendUid: string,
        time = 1710000000,
    ): PacketInfo {
        const content = protobuf_encode<NewFriend>({
            field1: 0,
            info: { uid: friendUid, time, message: 'hello', nickName: 'Alice' },
        });
        return makeEvent0x210PacketAny(subType, content);
    }

    it('emits friend_add for subType 179', () => {
        const member = makeGroupMember(99999, 'u_new_friend');
        const [event] = parseMsgPush(
            makeNewFriendPacket(179, member.uid),
            makeIdentity([member]),
        ) as FriendAddEvent[];

        expect(event.kind).toBe('friend_add');
        expect(event.userUin).toBe(99999);
        expect(event.time).toBe(1710000000);
    });

    it('emits friend_add for subType 226 (same wire shape, different surface)', () => {
        const member = makeGroupMember(88888, 'u_other_friend');
        const [event] = parseMsgPush(
            makeNewFriendPacket(226, member.uid),
            makeIdentity([member]),
        ) as FriendAddEvent[];

        expect(event.kind).toBe('friend_add');
        expect(event.userUin).toBe(88888);
    });

    it('falls back to the packet routingHead.fromUin when the uid is not in the local cache', () => {
        // No member registered for `u_unknown_uid`, but the packet itself
        // carries the new friend's uin on `fromUin` (22222 in
        // makeEvent0x210PacketAny). That's the wire-level convention
        // (LagrangeGo emits unconditionally then calls `ResolveUin` post
        // hoc, see `client/listener.go:259`). Without the fallback the
        // event would either drop or surface `user_id: 0`, both of which
        // confuse OneBot consumers.
        const [event] = parseMsgPush(
            makeNewFriendPacket(179, 'u_unknown_uid'),
            makeIdentity(),
        ) as FriendAddEvent[];
        expect(event.kind).toBe('friend_add');
        expect(event.userUin).toBe(22222); // the packet's fromUin
    });
});

describe('parseMsgPush Event0x210 subType=364 (friend remark synchronization)', () => {
    function makeFriendRemarkPacket(uid: string, uin: number, remark: string): PacketInfo {
        const content = protobuf_encode<FriendRemarkChangedNotify>({
            change: {
                target: { uid, uin: BigInt(uin) },
                remark,
            },
            updateTime: 1710000000,
            nickname: 'Alice',
            changeType: 1,
        });
        return makeEvent0x210PacketAny(364, content);
    }

    it('decodes a pure internal synchronization event', () => {
        const identity = makeIdentity();
        identity.rememberFriends([
            {
                uin: 22222,
                uid: 'u_friend',
                nickname: 'Alice',
                remark: 'old-remark',
            },
        ]);

        expect(
            parseMsgPush(makeFriendRemarkPacket('u_friend', 22222, 'new-remark'), identity),
        ).toEqual([
            {
                kind: 'friend_remark_changed',
                time: 1710000000,
                selfUin: Number(SELF_UIN),
                userUid: 'u_friend',
                userUin: 22222,
                remark: 'new-remark',
            },
        ]);
        expect(identity.findFriend(22222)?.remark).toBe('old-remark');
    });

    it('applies the synchronization at the packet-pipeline boundary', async () => {
        const identity = makeIdentity();
        identity.rememberFriends([
            {
                uin: 22222,
                uid: 'u_friend',
                nickname: 'Alice',
                remark: 'old-remark',
            },
        ]);
        const pipeline = new IncomingPacketPipeline({
            identity,
            events: new BridgeEventBus(),
            fetchGroupList: vi.fn(async () => {}),
            fetchGroupMemberList: vi.fn(async () => {}),
            resolveGroupJoinRequest: vi.fn(async () => null),
            groupInvites: new GroupInviteTracker(),
        });
        pipeline.registerCmd(MSG_PUSH_CMD, parseMsgPush);

        await pipeline.process(makeFriendRemarkPacket('u_friend', 22222, 'new-remark'));

        expect(identity.findFriend(22222)?.remark).toBe('new-remark');
    });
});

describe('parseMsgPush Event0x210 subType=277 (input status → 对方正在输入)', () => {
    // RE'd from wrapper.linux.node aio_input_state_worker.cc: 0x210/0x115 sys_msg,
    // body = InputStatusNotify {fromUid, toUid, notifyItem{eventType@f4}}.
    type FriendInputStatusEvent = Extract<QQEventVariant, { kind: 'friend_input_status' }>;

    function makeInputStatusPacket(fromUid: string, eventType: number): PacketInfo {
        const content = protobuf_encode<InputStatusNotify>({
            fromUid,
            toUid: 'u_self',
            notifyItem: { eventType },
        });
        return makeEvent0x210PacketAny(277, content);
    }

    it('emits friend_input_status (typing) for eventType 1', () => {
        const member = makeGroupMember(77777, 'u_typer');
        const [event] = parseMsgPush(
            makeInputStatusPacket(member.uid, 1),
            makeIdentity([member]),
        ) as FriendInputStatusEvent[];

        expect(event.kind).toBe('friend_input_status');
        expect(event.userUin).toBe(77777);
        expect(event.eventType).toBe(1);
        expect(event.statusText).toBe('对方正在输入...');
    });

    it('surfaces eventType 3 as the voice-recording status text', () => {
        const member = makeGroupMember(77777, 'u_typer');
        const [event] = parseMsgPush(
            makeInputStatusPacket(member.uid, 3),
            makeIdentity([member]),
        ) as FriendInputStatusEvent[];

        expect(event.eventType).toBe(3);
        expect(event.statusText).toBe('对方正在讲话...');
    });

    it('drops a body with no fromUid (nothing to key user_id on)', () => {
        const events = parseMsgPush(
            makeEvent0x210PacketAny(
                277,
                protobuf_encode<InputStatusNotify>({ notifyItem: { eventType: 1 } }),
            ),
            makeIdentity(),
        );
        expect(events).toEqual([]);
    });
});

describe('parseMsgPush Event0x210 subType=349 (online-device snapshot)', () => {
    it('decodes the complete device fields recovered from the QQ wire handler', () => {
        const content = protobuf_encode<OnlineDeviceNotify>({
            appId: 537242075,
            instanceId: 101,
            clientType: 1,
            platform: 3,
            devices: [
                {
                    appId: 537242075,
                    instanceId: 202,
                    clientType: 1,
                    platform: 3,
                    deviceName: 'DESKTOP-TEST',
                },
                {
                    appId: 537242075,
                    instanceId: 203,
                    clientType: 5,
                    platform: 3,
                    deviceName: 'DESKTOP-DUPLICATE',
                },
                {
                    appId: 537242075,
                    instanceId: 303,
                    clientType: 4,
                    platform: 2,
                    deviceName: 'Pixel 9',
                },
            ],
        });

        const events = parseMsgPush(makeEvent0x210PacketAny(349, content), makeIdentity());

        expect(events).toEqual([
            {
                kind: 'online_devices_changed',
                time: 1710000000,
                selfUin: Number(SELF_UIN),
                devices: [
                    {
                        appId: 537242075,
                        instanceId: 202,
                        clientType: 1,
                        platform: 3,
                        deviceName: 'DESKTOP-TEST',
                        deviceKind: 'computer',
                    },
                    {
                        appId: 537242075,
                        instanceId: 303,
                        clientType: 4,
                        platform: 2,
                        deviceName: 'Pixel 9',
                        deviceKind: 'phone',
                    },
                ],
            },
        ]);
    });

    it('normalizes packed wire client types before classification and deduplication', () => {
        const content = protobuf_encode<OnlineDeviceNotify>({
            devices: [
                {
                    appId: 1001,
                    instanceId: 202,
                    clientType: 83714, // 0x14702 -> phone client type 2
                    platform: 3,
                    deviceName: 'BOT-HOST',
                },
                {
                    appId: 1001,
                    instanceId: 203,
                    clientType: 65799, // 0x10107 -> phone client type 7
                    platform: 2,
                    deviceName: 'MOBILE-DUPLICATE',
                },
            ],
        });

        const events = parseMsgPush(makeEvent0x210PacketAny(349, content), makeIdentity());

        expect(events).toEqual([
            {
                kind: 'online_devices_changed',
                time: 1710000000,
                selfUin: Number(SELF_UIN),
                devices: [
                    {
                        appId: 1001,
                        instanceId: 202,
                        clientType: 2,
                        platform: 3,
                        deviceName: 'BOT-HOST',
                        deviceKind: 'phone',
                    },
                ],
            },
        ]);
    });

    it('rejects entries that omit required identity fields', () => {
        const content = protobuf_encode<OnlineDeviceNotify>({
            devices: [{ instanceId: 202, platform: 3, deviceName: 'BROKEN' }],
        });
        const captured: string[] = [];
        const unsubscribe = subscribeLogs((entry) => {
            if (entry.scope === 'MsgPush' && /online-device entry 0/.test(entry.message)) {
                captured.push(entry.message);
            }
        });

        try {
            expect(parseMsgPush(makeEvent0x210PacketAny(349, content), makeIdentity())).toEqual([]);
            expect(captured).toHaveLength(1);
            expect(captured[0]).toMatch(/appIdPresent=false clientTypePresent=false/);
        } finally {
            unsubscribe();
        }
    });
});

describe('parseMsgPush Event0x210 subType=39 (profile like → 名片赞)', () => {
    // 0x210/39 is multiplexed; body.msgContent decodes as ProfileLikeTip and is a
    // like only when inner msgType==0 && subType==203. Proto shape from NapCat's
    // raw-bytes decoder (pending a real like capture to validate byte-exactly).
    type FriendProfileLikeEvent = Extract<QQEventVariant, { kind: 'friend_profile_like' }>;

    function makeLikePacket(opts: {
        msgType?: number;
        subType?: number;
        uin?: number;
        nick?: string;
        txt?: string;
        time?: number;
    }): PacketInfo {
        const content = protobuf_encode<ProfileLikeTip>({
            msgType: opts.msgType ?? 0,
            subType: opts.subType ?? 203,
            content: {
                msg: {
                    time: opts.time ?? 1710001111,
                    detail: {
                        txt: opts.txt ?? '',
                        uin: BigInt(opts.uin ?? 0),
                        nickname: opts.nick ?? '',
                    },
                },
            },
        });
        return makeEvent0x210PacketAny(39, content);
    }

    it('emits friend_profile_like with liker uin, nick and parsed count', () => {
        // txt shape taken from a real capture: "赞了我的资料卡N次".
        const [event] = parseMsgPush(
            makeLikePacket({ uin: 1206069534, nick: '墨白灵MotricLuck', txt: '赞了我的资料卡2次' }),
            makeIdentity(),
        ) as FriendProfileLikeEvent[];

        expect(event.kind).toBe('friend_profile_like');
        expect(event.operatorUin).toBe(1206069534);
        expect(event.operatorNick).toBe('墨白灵MotricLuck');
        expect(event.times).toBe(2);
        expect(event.time).toBe(1710001111);
    });

    it('ignores a non-like 39 variant (inner subType != 203)', () => {
        const events = parseMsgPush(
            makeLikePacket({ subType: 999, uin: 1787882683 }),
            makeIdentity(),
        );
        expect(events).toEqual([]);
    });
});

describe('parseMsgPush Event0x2DC subType=16 field13=6 (group special title)', () => {
    // Built from a REAL on-wire capture: eventParam f2 = the gray-tip template
    // "恭喜<{member}>获得群主授予的<{…"text":TITLE…}>头衔", f5 = member uin. The title
    // is the last <{…}> token's text.
    type GroupTitleChangeEvent = Extract<QQEventVariant, { kind: 'group_title_change' }>;

    const TIP =
        '恭喜<{"cmd":5,"data":"3433035623","text":"星屿"}>获得群主授予的' +
        '<{"cmd":1,"data":"https://qun.qq.com/x?medal=302&uin=3433035623","text":"摸鱼冠军",' +
        '"url":"https://qun.qq.com/x?medal=302&uin=3433035623"}>头衔';

    function makeTitlePacket(memberUin: number, tip: string): PacketInfo {
        const notify = protobuf_encode<NotifyMessageBody>({
            groupUin: GROUP_ID,
            field13: 6,
            eventParam: protobuf_encode<GroupSpecialTitleChange>({ tipText: tip, memberUin }),
        });
        const content = new Uint8Array(7 + notify.length);
        content.set(notify, 7);
        const body = protobuf_encode<PushMsg>({
            message: {
                responseHead: { fromUin: 0, type: 0, sigMap: 0 },
                contentHead: { msgType: 732, subType: 16, timestamp: 1710000000 },
                body: { msgContent: content },
            },
            status: 0,
        });
        return {
            pid: 1,
            uin: SELF_UIN,
            serviceCmd: MSG_PUSH_CMD,
            seqId: 1,
            retCode: 0,
            fromClient: false,
            body,
        };
    }

    it('emits group_title_change with the granted title + member', () => {
        const [event] = parseMsgPush(
            makeTitlePacket(22222, TIP),
            makeIdentity([makeGroupMember(22222, 'u_member')]),
        ) as GroupTitleChangeEvent[];

        expect(event.kind).toBe('group_title_change');
        expect(event.groupId).toBe(GROUP_ID);
        expect(event.userUin).toBe(22222);
        expect(event.title).toBe('摸鱼冠军'); // last <{…}> token's text
    });

    it('drops a title tip with no parseable title token', () => {
        const events = parseMsgPush(makeTitlePacket(22222, '恭喜获得头衔'), makeIdentity());
        expect(events).toEqual([]);
    });
});

describe('parseMsgPush Event0x2DC subType=16 field13=12 (group name change)', () => {
    // RE cross-ref: Lagrange Event0x2DCSubType16Field13.GroupNameChangeNotice = 12,
    // EventParam(f5) → GroupNameChange{f2=name}, operator = NotifyMessageBody.f21.
    // The 0x2DC subType16 body carries a 7-byte prefix (groupUin+byte+len) before
    // the NotifyMessageBody proto — the decoder strips it via subarray(7).
    type GroupNameChangeEvent = Extract<QQEventVariant, { kind: 'group_name_change' }>;

    function makeGroupNamePacket(groupUin: number, operatorUid: string, name: string): PacketInfo {
        const notify = protobuf_encode<NotifyMessageBody>({
            groupUin,
            field13: 12,
            operatorUid,
            eventParam: protobuf_encode<GroupNameChange>({ name }),
        });
        const content = new Uint8Array(7 + notify.length); // 7-byte prefix + proto
        content.set(notify, 7);
        const body = protobuf_encode<PushMsg>({
            message: {
                responseHead: { fromUin: 0, type: 0, sigMap: 0 },
                contentHead: { msgType: 732, subType: 16, timestamp: 1710000000 },
                body: { msgContent: content },
            },
            status: 0,
        });
        return {
            pid: 1,
            uin: SELF_UIN,
            serviceCmd: MSG_PUSH_CMD,
            seqId: 1,
            retCode: 0,
            fromClient: false,
            body,
        };
    }

    it('emits group_name_change with the new name + operator', () => {
        const member = makeGroupMember(54321, 'u_operator');
        const [event] = parseMsgPush(
            makeGroupNamePacket(GROUP_ID, member.uid, '新的群名'),
            makeIdentity([member]),
        ) as GroupNameChangeEvent[];

        expect(event.kind).toBe('group_name_change');
        expect(event.groupId).toBe(GROUP_ID);
        expect(event.name).toBe('新的群名');
        expect(event.operatorUin).toBe(54321);
    });

    it('drops a name-change body with an empty name', () => {
        const events = parseMsgPush(
            makeGroupNamePacket(GROUP_ID, 'u_operator', ''),
            makeIdentity(),
        );
        expect(events).toEqual([]);
    });
});

describe('parseMsgPush Event0x210 subType=139 (self-recall direction)', () => {
    // 138 = friend recalled their own message sent to bot
    //       (peer in friend_recall event = fromUid)
    // 139 = bot recalled own message sent to friend
    //       (peer in friend_recall event = toUid)
    // Same wire shape; the subType is the direction discriminator.
    // Acidify makes the same split in `parseFriendRecall:380`. Without
    // 139, self-recalls used to fall through and disappear.

    function makeFriendRecallPacket(
        subType: 138 | 139,
        fromUid: string,
        toUid: string,
    ): PacketInfo {
        const content = protobuf_encode<FriendRecall>({
            info: {
                fromUid,
                toUid,
                clientSequence: 4242,
                newId: 0n,
                time: 1710000000,
                random: 0,
                pkgNum: 1,
                pkgIndex: 0,
                divSeq: 1,
            },
        });
        return makeEvent0x210PacketAny(subType, content);
    }

    it('subType 138 keeps fromUid as the resolved peer (other recalled their own msg to us)', () => {
        const friend = makeGroupMember(77777, 'u_friend');
        const [event] = parseMsgPush(
            makeFriendRecallPacket(138, friend.uid, 'u_self'),
            makeIdentity([friend]),
        ) as FriendRecallEvent[];

        expect(event.kind).toBe('friend_recall');
        expect(event.userUin).toBe(77777);
        expect(event.msgSeq).toBe(4242);
        expect(event.clientSeq).toBe(4242);
        expect(event.recalledBySelf).toBe(false);
    });

    it('subType 139 picks toUid as the peer (we recalled our msg sent to friend)', () => {
        const friend = makeGroupMember(77777, 'u_friend');
        const [event] = parseMsgPush(
            makeFriendRecallPacket(139, 'u_self', friend.uid),
            makeIdentity([friend]),
        ) as FriendRecallEvent[];

        expect(event.kind).toBe('friend_recall');
        expect(event.userUin).toBe(77777); // resolved from toUid (the friend), not fromUid (us)
        expect(event.recalledBySelf).toBe(true);
    });
});

describe('parseMsgPush PkgType 85 (bot self-joined a group)', () => {
    // PkgType 33 (GroupMemberIncreaseNotice) fires for *other* members
    // joining; the bot's own join after `set_group_add_request` approval
    // / invite-accept arrives at 85 instead. We surface it as
    // `group_member_join` with `userUin = selfUin` so the OneBot
    // converter naturally produces `notice.group_increase`.
    function makeSelfJoinPacket(groupId: number, operatorUid = ''): PacketInfo {
        const content = protobuf_encode<SelfJoinInGroup>({
            groupUin: BigInt(groupId),
            field2: 1,
            operatorUid,
            field4: 0,
            field6: 48,
            field7: '',
        });
        const body = protobuf_encode<PushMsg>({
            message: {
                responseHead: { fromUin: groupId, type: 0, sigMap: 0 },
                contentHead: { msgType: 85, subType: 0, timestamp: 1710000000 },
                body: { msgContent: content },
            },
            status: 0,
        });
        return {
            pid: 1,
            uin: SELF_UIN,
            serviceCmd: MSG_PUSH_CMD,
            seqId: 1,
            retCode: 0,
            fromClient: false,
            body,
        };
    }

    it('emits group_member_join with userUin == selfUin', () => {
        const [event] = parseMsgPush(
            makeSelfJoinPacket(GROUP_ID),
            makeIdentity(),
        ) as GroupMemberJoin[];

        expect(event.kind).toBe('group_member_join');
        expect(event.groupId).toBe(GROUP_ID);
        expect(event.userUin).toBe(Number(SELF_UIN));
    });

    it('resolves operator uid through identity when present', () => {
        const admin = makeGroupMember(11111, 'u_admin');
        const [event] = parseMsgPush(
            makeSelfJoinPacket(GROUP_ID, admin.uid),
            makeIdentity([admin]),
        ) as GroupMemberJoin[];

        expect(event.operatorUin).toBe(admin.uin);
        expect(event.operatorUid).toBe(admin.uid);
    });
});

describe('parseMsgPush PkgType 44 (group admin set/unset) keeps the member cache fresh', () => {
    // Regression for #93: get_group_member_info serves the cache. Role
    // patch is IncomingPacketPipeline observation, not Decoder.
    function makeGroupAdminPacket(adminUid: string, set: boolean, fromUin = GROUP_ID): PacketInfo {
        const extra = { adminUid };
        const content = protobuf_encode<GroupAdmin>({
            groupUin: GROUP_ID,
            body: set ? { extraEnable: extra } : { extraDisable: extra },
        });
        const body = protobuf_encode<PushMsg>({
            message: {
                responseHead: { fromUin },
                contentHead: { msgType: 44, timestamp: 1710000000 },
                body: { msgContent: content },
            },
            status: 0,
        });
        return {
            pid: 1,
            uin: SELF_UIN,
            serviceCmd: MSG_PUSH_CMD,
            seqId: 1,
            retCode: 0,
            fromClient: false,
            body,
        };
    }

    async function processAdmin(identity: IdentityService, packet: PacketInfo): Promise<void> {
        const pipeline = new IncomingPacketPipeline({
            identity,
            events: new BridgeEventBus(),
            fetchGroupList: vi.fn(async () => {}),
            fetchGroupMemberList: vi.fn(async () => {}),
            resolveGroupJoinRequest: vi.fn(async () => null),
            groupInvites: new GroupInviteTracker(),
        });
        pipeline.registerCmd(MSG_PUSH_CMD, parseMsgPush);
        await pipeline.process(packet);
    }

    it('Decoder emits the event without writing Identity', () => {
        const member = makeGroupMember(22222, 'u_member');
        const identity = makeIdentity([member]);

        const [event] = parseMsgPush(
            makeGroupAdminPacket(member.uid, true),
            identity,
        ) as GroupAdminEvent[];

        expect(event.kind).toBe('group_admin');
        expect(event.userUin).toBe(member.uin);
        expect(event.set).toBe(true);
        expect(identity.findGroupMember(GROUP_ID, member.uin)?.role).toBe('member');
    });

    it('promotes a cached member to admin at the packet-pipeline boundary', async () => {
        const member = makeGroupMember(22222, 'u_member');
        const identity = makeIdentity([member]);

        await processAdmin(identity, makeGroupAdminPacket(member.uid, true));

        expect(identity.findGroupMember(GROUP_ID, member.uin)?.role).toBe('admin');
    });

    it('demotes a cached admin back to member on an unset push', async () => {
        const admin = { ...makeGroupMember(22222, 'u_admin'), role: 'admin' };
        const identity = makeIdentity([admin]);

        await processAdmin(identity, makeGroupAdminPacket(admin.uid, false));

        expect(identity.findGroupMember(GROUP_ID, admin.uin)?.role).toBe('member');
    });

    it('never downgrades the owner', async () => {
        const owner = { ...makeGroupMember(22222, 'u_owner'), role: 'owner' };
        const identity = makeIdentity([owner]);

        await processAdmin(identity, makeGroupAdminPacket(owner.uid, false));

        expect(identity.findGroupMember(GROUP_ID, owner.uin)?.role).toBe('owner');
    });

    it('is a no-op (no throw, no phantom member) when the target is not cached', async () => {
        const identity = makeIdentity();

        const [event] = parseMsgPush(
            makeGroupAdminPacket('u_unknown', true),
            identity,
        ) as GroupAdminEvent[];
        await processAdmin(identity, makeGroupAdminPacket('u_unknown', true));

        expect(event.kind).toBe('group_admin');
        expect(event.userUin).toBe(0);
        expect(identity.findGroupMember(GROUP_ID, GROUP_ID)).toBeNull();
    });
});