import { describe, expect, it, vi } from 'vitest';
import { protobuf_decode, protobuf_encode } from '@snowluma/proton';
import type { OidbBase, OidbSvcTrpcTcp0xFE7_3Response } from '@snowluma/proto-defs/oidb';
import type { OidbGroupMemberListRequest } from '@snowluma/proto-defs/oidb-actions/base';
import type { SendPacketResult } from '@snowluma/common/packet-sender';

import { FetchGroupMemberListPage } from '../../../src/oidb-services/contacts/fetch-group-member-list-page';

function makeSender(body?: OidbSvcTrpcTcp0xFE7_3Response) {
    const responseData =
        body !== undefined
            ? Buffer.from(protobuf_encode<OidbBase<OidbSvcTrpcTcp0xFE7_3Response>>({ body }))
            : Buffer.alloc(0);
    const r: SendPacketResult = {
        success: true,
        gotResponse: true,
        errorCode: 0,
        errorMessage: '',
        responseData,
    };
    return { sendRawPacket: vi.fn(async () => r) };
}

describe('FetchGroupMemberListPage namespace', () => {
    it('declares 0xFE7_3', () => {
        expect(FetchGroupMemberListPage.command).toBe(0xfe7);
        expect(FetchGroupMemberListPage.subCommand).toBe(3);
    });

    describe('serialize', () => {
        it('omits the token on the first page', () => {
            const out = FetchGroupMemberListPage.serialize({} as any, {
                groupId: 12345,
                token: '',
            }) as any;
            expect(out.token).toBeUndefined();
            expect(out.groupUin).toBe(12345);
        });

        it('threads the server-issued token into follow-up pages', () => {
            const out = FetchGroupMemberListPage.serialize({} as any, {
                groupId: 12345,
                token: 'next-cursor',
            }) as any;
            expect(out.token).toBe('next-cursor');
        });

        it('always requests the full member-field projection', () => {
            const out = FetchGroupMemberListPage.serialize({} as any, {
                groupId: 1,
                token: '',
            }) as any;
            expect(out.body).toMatchObject({
                memberName: true,
                memberCard: true,
                level: true,
                joinTimestamp: true,
                lastMsgTimestamp: true,
                shutUpTimestamp: true,
                permission: true,
            });
        });
    });

    describe('invoke (e2e)', () => {
        it('routes to OidbSvcTrpcTcp.0xfe7_3', async () => {
            const sender = makeSender();
            await FetchGroupMemberListPage.invoke(sender, { groupId: 1, token: '' });
            expect(sender.sendRawPacket.mock.calls[0]![0]).toBe('OidbSvcTrpcTcp.0xfe7_3');
        });

        it('encodes envelope body with the groupId', async () => {
            const sender = makeSender();
            await FetchGroupMemberListPage.invoke(sender, { groupId: 12345, token: '' });
            const [, bytes] = sender.sendRawPacket.mock.calls[0]!;
            const env = protobuf_decode<OidbBase<OidbGroupMemberListRequest>>(bytes);
            expect(env.body?.groupUin).toBe(12345);
        });

        it('maps members into GroupMemberInfo and leaves isRobot unset-false', async () => {
            const sender = makeSender({
                token: 'next',
                members: [
                    {
                        uin: { uid: 'u_admin', uin: 22222 },
                        memberName: 'Ada',
                        specialTitle: 't',
                        memberCard: { memberCard: Buffer.from('card') },
                        level: { level: 12 },
                        joinTimestamp: 1,
                        lastMsgTimestamp: 2,
                        shutUpTimestamp: 3,
                        permission: 2,
                    },
                ],
            });
            await expect(
                FetchGroupMemberListPage.invoke(sender, { groupId: 42, token: '' }),
            ).resolves.toEqual({
                token: 'next',
                members: [
                    {
                        uin: 22222,
                        uid: 'u_admin',
                        nickname: 'Ada',
                        card: 'card',
                        isRobot: false,
                        role: 'admin',
                        level: 12,
                        title: 't',
                        joinTime: 1,
                        lastSentTime: 2,
                        shutUpTime: 3,
                    },
                ],
            });
        });

        it('maps permission 1 to owner and missing fields to 0 / empty', () => {
            expect(
                FetchGroupMemberListPage.deserialize({} as any, {
                    members: [{ permission: 1 }, {}],
                }),
            ).toEqual({
                token: '',
                members: [
                    {
                        uin: 0,
                        uid: '',
                        nickname: '',
                        card: '',
                        isRobot: false,
                        role: 'owner',
                        level: 0,
                        title: '',
                        joinTime: 0,
                        lastSentTime: 0,
                        shutUpTime: 0,
                    },
                    {
                        uin: 0,
                        uid: '',
                        nickname: '',
                        card: '',
                        isRobot: false,
                        role: 'member',
                        level: 0,
                        title: '',
                        joinTime: 0,
                        lastSentTime: 0,
                        shutUpTime: 0,
                    },
                ],
            });
        });
    });
});