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

import { FetchCustomFaceList } from '../../../src/oidb-services/custom-face/fetch-custom-face-list';

const SAMPLE_UIN = '10001';
const EMOJI_A = '10001_0_0_0_AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA_0_0';
const EMOJI_B = '10001_0_0_0_BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB_0_0';

function encodeLegacyList(uin: string): Uint8Array {
    return protobuf_encode<FaceroamOpReq>({
        inner: { field1: 1, osVersion: '10.0.26200', qqVersion: '9.9.28-46928' },
        uin: BigInt(uin),
        field3: 1,
        field6: 1,
    });
}

function makeSender(
    opts: {
        faces?: FaceroamOpResp;
        success?: boolean;
        gotResponse?: boolean;
        errorMessage?: string;
        responseData?: Uint8Array | null;
    } = {},
) {
    const result: SendPacketResult = {
        success: opts.success ?? true,
        gotResponse: opts.gotResponse ?? true,
        errorCode: 0,
        errorMessage: opts.errorMessage ?? '',
        responseData:
            opts.responseData !== undefined
                ? opts.responseData
                : Buffer.from(
                      protobuf_encode<FaceroamOpResp>(
                          opts.faces ?? { retCode: 0, item: { faceIds: [EMOJI_A, EMOJI_B] } },
                      ),
                  ),
    };
    return { sendRawPacket: vi.fn(async () => result) };
}

describe('FetchCustomFaceList namespace', () => {
    describe('serialize + encode', () => {
        it('keeps the list request bytes the ProfileApi fetch already sent', () => {
            const req = FetchCustomFaceList.serialize({} as any, { uin: SAMPLE_UIN });
            const hex = Buffer.from(FetchCustomFaceList.encode(req)).toString('hex');
            expect(hex).toBe(Buffer.from(encodeLegacyList(SAMPLE_UIN)).toString('hex'));
        });

        it('sends qqVersion on inner and sets field3=1 / field6=1', () => {
            const req = FetchCustomFaceList.serialize({} as any, { uin: SAMPLE_UIN });
            expect(req.inner?.qqVersion).toBe('9.9.28-46928');
            expect(req.inner?.osVersion).toBe('10.0.26200');
            expect(req.field3).toBe(1);
            expect(req.field6).toBe(1);
            expect(req.body).toBeUndefined();
        });
    });

    describe('invoke', () => {
        it('routes through "Faceroam.OpReq" and returns the id list', async () => {
            const sender = makeSender();
            await expect(FetchCustomFaceList.invoke(sender, { uin: SAMPLE_UIN })).resolves.toEqual([
                EMOJI_A,
                EMOJI_B,
            ]);
            expect(sender.sendRawPacket.mock.calls[0]![0]).toBe('Faceroam.OpReq');
            const [, body] = sender.sendRawPacket.mock.calls[0]!;
            expect(Buffer.from(body as Uint8Array).toString('hex')).toBe(
                Buffer.from(encodeLegacyList(SAMPLE_UIN)).toString('hex'),
            );
        });

        it('returns an empty list when the item is missing', async () => {
            const sender = makeSender({ faces: { retCode: 0 } });
            await expect(FetchCustomFaceList.invoke(sender, { uin: SAMPLE_UIN })).resolves.toEqual(
                [],
            );
        });

        it('throws when the sender reports no response', async () => {
            const sender = makeSender({
                success: false,
                gotResponse: false,
                errorMessage: 'timeout',
                responseData: null,
            });
            await expect(FetchCustomFaceList.invoke(sender, { uin: SAMPLE_UIN })).rejects.toThrow(
                /timeout/,
            );
        });

        it('throws when the Faceroam retCode is non-zero', async () => {
            const sender = makeSender({ faces: { retCode: 1, message: 'denied' } });
            await expect(FetchCustomFaceList.invoke(sender, { uin: SAMPLE_UIN })).rejects.toThrow(
                /fetch custom face error: denied/,
            );
        });
    });
});