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

import { KickMember } from '../../../src/oidb-services/group-admin/kick-member';
import { m, s, v } from '../_pb-oracle';

/** 24-byte uid: success items on the wire are `{ result:0, uid }` with uid length 0x18. */
const TRACE_UID = 'u_abcdefghijklmnopqrstuv';

function kickResultItem(result: number, uid: string): number[] {
    return [...v(1, result), ...s(2, uid)];
}

function kickResponseBytes(groupUin: number, items: number[][]): Buffer {
    const body = [...v(1, groupUin), ...items.flatMap((item) => m(2, item))];
    return Buffer.from(m(4, body));
}

function makeDeps(responseData: Buffer = Buffer.alloc(0)) {
    const r: SendPacketResult = {
        success: true,
        gotResponse: true,
        errorCode: 0,
        errorMessage: '',
        responseData,
    };
    return {
        sendRawPacket: vi.fn(async () => r),
        resolveUserUid: vi.fn(async () => 'resolved-uid'),
    };
}

describe('KickMember namespace', () => {
    it('declares 0x8A0_1', () => {
        expect(KickMember.command).toBe(0x8a0);
        expect(KickMember.subCommand).toBe(1);
    });

    it('resolves uid per-group and forwards reject + reason', async () => {
        const deps = makeDeps();
        await KickMember.invoke(deps, {
            groupId: 12345,
            userId: 67890,
            reject: true,
            reason: 'bye',
        });
        expect(deps.resolveUserUid).toHaveBeenCalledWith(67890, 12345);
        const [wire, bytes] = deps.sendRawPacket.mock.calls[0]!;
        expect(wire).toBe('OidbSvcTrpcTcp.0x8a0_1');
        const env = protobuf_decode<OidbBase<OidbKickMember>>(bytes);
        expect(env.body).toMatchObject({
            groupUin: 12345,
            targetUid: 'resolved-uid',
            rejectAddRequest: true,
            reason: 'bye',
        });
    });

    it('defaults reason to empty string', async () => {
        const deps = makeDeps();
        await KickMember.invoke(deps, { groupId: 1, userId: 2, reject: false });
        const [, bytes] = deps.sendRawPacket.mock.calls[0]!;
        const env = protobuf_decode<OidbBase<OidbKickMember>>(bytes);
        expect(env.body?.reason ?? '').toBe('');
        expect(env.body?.rejectAddRequest ?? false).toBe(false);
    });

    it('treats an empty body as success', async () => {
        await expect(
            KickMember.invoke(makeDeps(), {
                groupId: 1,
                userId: 2,
                reject: false,
            }),
        ).resolves.toBeUndefined();
    });

    it('treats a zero per-member result plus uid as success (#413)', async () => {
        const bytes = kickResponseBytes(12345, [kickResultItem(0, TRACE_UID)]);
        const decoded = KickMember.decode(bytes);
        expect(decoded.body?.groupUin).toBe(12345);
        expect(decoded.body?.results).toEqual([{ result: 0, uid: TRACE_UID }]);

        await expect(
            KickMember.invoke(makeDeps(bytes), {
                groupId: 12345,
                userId: 67890,
                reject: false,
            }),
        ).resolves.toBeUndefined();
    });

    it('rejects a non-zero per-member result with the numeric code, not the uid (#298)', async () => {
        const bytes = kickResponseBytes(12345, [kickResultItem(7, TRACE_UID)]);
        await expect(
            KickMember.invoke(makeDeps(bytes), {
                groupId: 12345,
                userId: 67890,
                reject: false,
            }),
        ).rejects.toThrow('kick member failed: result=7');
    });

    it('deserialize: omitted/zero results succeed; non-zero throws', () => {
        expect(() => KickMember.deserialize({} as never, {})).not.toThrow();
        expect(() => KickMember.deserialize({} as never, { results: [] })).not.toThrow();
        expect(() =>
            KickMember.deserialize({} as never, {
                results: [{ result: 0, uid: TRACE_UID }],
            }),
        ).not.toThrow();
        expect(() =>
            KickMember.deserialize({} as never, {
                results: [{ uid: TRACE_UID }],
            }),
        ).not.toThrow();
        expect(() =>
            KickMember.deserialize({} as never, {
                results: [{ result: 1, uid: TRACE_UID }],
            }),
        ).toThrow('kick member failed: result=1');
    });
});