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

import { GetGroupFileUrl } from '../../../src/oidb-services/group-file/get-group-file-url';

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

describe('GetGroupFileUrl namespace', () => {
    it('declares 0x6D6_2 with uinForm=true', () => {
        expect(GetGroupFileUrl.command).toBe(0x6d6);
        expect(GetGroupFileUrl.subCommand).toBe(2);
        expect(GetGroupFileUrl.uinForm).toBe(true);
    });

    it('packages the download slot with the supplied busId', async () => {
        const deps = makeDeps({
            download: { downloadDns: 'cdn', downloadUrl: new Uint8Array([1, 2]) } as any,
        });
        await GetGroupFileUrl.invoke(deps, { groupId: 12345, fileId: 'fid', busId: 102 });
        const [wire, bytes] = deps.sendRawPacket.mock.calls[0]!;
        expect(wire).toBe('OidbSvcTrpcTcp.0x6d6_2');
        const env = protobuf_decode<OidbBase<OidbGroupFileReq>>(bytes);
        expect(env.body?.download).toMatchObject({
            groupUin: 12345,
            appId: 7,
            busId: 102,
            fileId: 'fid',
        });
    });

    it('composes the https ftn_handler URL and checks download.retCode', async () => {
        const deps = makeDeps({
            download: { downloadDns: 'cdn', downloadUrl: new Uint8Array([0x01, 0x02]) } as any,
        });
        await expect(
            GetGroupFileUrl.invoke(deps, { groupId: 1, fileId: 'fid-xyz', busId: 102 }),
        ).resolves.toBe('https://cdn/ftn_handler/0102/?fname=fid-xyz');
    });

    it('throws when download.retCode is non-zero', async () => {
        const deps = makeDeps({
            download: {
                retCode: 1,
                retMsg: 'denied',
                downloadDns: 'cdn',
                downloadUrl: new Uint8Array([1]),
            } as any,
        });
        await expect(
            GetGroupFileUrl.invoke(deps, { groupId: 1, fileId: 'f', busId: 102 }),
        ).rejects.toThrow(/group file url failed: code=1/);
    });

    it('throws when the download sub-message is missing', async () => {
        const deps = makeDeps({});
        await expect(
            GetGroupFileUrl.invoke(deps, { groupId: 1, fileId: 'f', busId: 102 }),
        ).rejects.toThrow(/url response missing/);
    });

    it('falls back to downloadIp when downloadDns is empty', async () => {
        const deps = makeDeps({
            download: { downloadIp: '1.2.3.4', downloadUrl: new Uint8Array([0xab]) } as any,
        });
        await expect(
            GetGroupFileUrl.invoke(deps, { groupId: 1, fileId: 'fid', busId: 102 }),
        ).resolves.toBe('https://1.2.3.4/ftn_handler/AB/?fname=fid');
    });
});