// Regression test for the "two images in one message" bug user report.
//
// User saw: 1st image fast-uploaded (server already had the bytes), 2nd
// image triggered an actual highway PUT and the highway server returned
// `error_code=921`.
//
// This test walks two `runNtv2Upload` calls back-to-back through the
// real pipeline + buildHighwayExtend code path with the highway TCP/HTTP
// transport stubbed, and verifies:
//
//   - the two calls don't share state (each has its own session, its
//     own OIDB request, its own extend bytes),
//   - the second call's extend payload is well-formed (uKey + msgInfoBody
//     + ipv4s come from the *second* call's response, not the first),
//   - the highway PUT receives the second image's bytes + md5 + sha1
//     verbatim (no aliasing / truncation across calls).
//
// If this test ever starts failing, it's a real bug in the pipeline
// (state sharing, async race, or wrong-buffer aliasing). If it
// continues to pass, the user's 921 is almost certainly server-side
// (rate limit, malformed image rejection, expired session) rather than
// a client-emit issue.

import { describe, it, expect, vi, beforeEach } from 'vitest';
import { protobuf_decode, protobuf_encode } from '@snowluma/proton';

vi.mock('@snowluma/protocol/highway', async () => {
    const real = await vi.importActual<typeof import('@snowluma/protocol/highway')>(
        '@snowluma/protocol/highway',
    );
    return {
        ...real,
        // Only the TCP/HTTP transport is mocked — we keep real
        // `buildHighwayExtend` so we can inspect its output bytes.
        fetchHighwaySession: vi.fn(async () => ({
            sigSession: new Uint8Array([0xaa]),
            sessionKey: new Uint8Array([0xbb]),
            servers: [{ host: 'highway.example', port: 80 }],
        })),
        uploadHighwayHttp: vi.fn(async () => undefined),
    };
});

import * as highway from '@snowluma/protocol/highway';
import { runNtv2Upload, type MediaSubFileUpload } from '@snowluma/protocol/highway/pipeline';
import type { OidbBase } from '@snowluma/proto-defs/oidb';
import type {
    NTV2UploadRichMediaReq,
    NTV2UploadRichMediaResp,
    NTV2RichMediaHighwayExt,
} from '@snowluma/proto-defs/highway';

function encodeOidbResponse(body: any): Buffer {
    return Buffer.from(
        protobuf_encode<OidbBase<NTV2UploadRichMediaResp>>({
            command: 0x11c4,
            subCommand: 100,
            errorCode: 0,
            body: body as Record<string, unknown>,
            errorMsg: '',
            reserved: 1,
        }),
    );
}

function makeBridge(responses: Buffer[]) {
    const sendRawPacket = vi.fn();

    for (const r of responses) {
        sendRawPacket.mockResolvedValueOnce({
            success: true,
            gotResponse: true,
            errorCode: 0,
            errorMessage: '',
            responseData: r,
        });
    }

    return { sendRawPacket, identity: { uin: '10001' } } as any;
}

const baseParams = (bridge: any) => ({
    bridge,
    isGroup: true,
    targetIdOrUid: 894750076,
    oidbCmd: 0x11c4,
    serviceCmd: 'OidbSvcTrpcTcp.0x11c4_100',
    requestId: 1,
    businessType: 1,
    compatQmsgSceneType: 2,
    extBizInfo: { pic: { bizType: 0, textSummary: '[image]' } },
});

describe('runNtv2Upload — two images in one message (sequential)', () => {
    beforeEach(() => {
        vi.mocked(highway.fetchHighwaySession).mockClear();
        vi.mocked(highway.uploadHighwayHttp).mockClear();
    });

    it("does not leak the first image's upload metadata into the second's extend", async () => {
        // Image 1 server response: NO uKey (fast-upload hit). The pipeline
        // must skip the highway PUT entirely for this call.
        // Image 2 server response: uKey + ipv4s + msgInfoBody set → real PUT.
        const image1Bytes = Buffer.from(new Uint8Array(238963));
        const image1Md5 = new Uint8Array(16).fill(0xf4);
        const image2Bytes = Buffer.from(new Uint8Array(58));
        const image2Md5 = new Uint8Array(16).fill(0xdd);
        const image2Sha1 = new Uint8Array(20).fill(0x11);

        const bridge = makeBridge([
            // First OIDB upload response: fast-path hit (no uKey).
            encodeOidbResponse({
                upload: {
                    msgInfo: {
                        msgInfoBody: [{ index: { fileUuid: 'uuid-1' } }],
                        extBizInfo: {},
                    },
                },
            }),
            // Second OIDB upload response: needs highway PUT.
            encodeOidbResponse({
                upload: {
                    uKey: 'ukey-image-2',
                    ipv4s: [{ outIp: 0x04030201, outPort: 8080 }],
                    msgInfo: {
                        msgInfoBody: [
                            {
                                index: {
                                    fileUuid: 'uuid-2',
                                    info: { fileHash: 'dd', fileSha1: '11' },
                                },
                            },
                        ],
                        extBizInfo: {},
                    },
                },
            }),
        ]);

        const uploads1: MediaSubFileUpload[] = [
            {
                source: 'top',
                cmdId: 1004,
                bytes: image1Bytes,
                md5: image1Md5,
                sha1: new Uint8Array(20).fill(0xab),
                fastOnlyError: 'image fast-upload not available',
            },
        ];
        const uploads2: MediaSubFileUpload[] = [
            {
                source: 'top',
                cmdId: 1004,
                bytes: image2Bytes,
                md5: image2Md5,
                sha1: image2Sha1,
                fastOnlyError: 'image fast-upload not available',
            },
        ];

        // Image 1 — fast path; must NOT touch the highway transport.
        await runNtv2Upload({
            ...baseParams(bridge),
            uploadInfo: [
                {
                    fileInfo: { fileName: 'a.jpg', fileSize: 238963 },
                    subFileType: 0,
                },
            ],
            uploads: uploads1,
            label: 'image',
        });
        expect(highway.fetchHighwaySession).not.toHaveBeenCalled();
        expect(highway.uploadHighwayHttp).not.toHaveBeenCalled();

        // Image 2 — must PUT through highway exactly once.
        await runNtv2Upload({
            ...baseParams(bridge),
            uploadInfo: [
                {
                    fileInfo: { fileName: 'b.jpg', fileSize: 58 },
                    subFileType: 0,
                },
            ],
            uploads: uploads2,
            label: 'image',
        });
        expect(highway.fetchHighwaySession).toHaveBeenCalledOnce();
        expect(highway.uploadHighwayHttp).toHaveBeenCalledOnce();

        // The PUT receives image-2's bytes, image-2's md5, and the
        // image-2-derived extend (NOT image-1's data).
        const [, , cmdId, putSource, putMd5, putExtend] = vi.mocked(highway.uploadHighwayHttp).mock
            .calls[0]!;
        expect(cmdId).toBe(1004);
        // The PUT source is a ChunkSource wrapping image-2's bytes — verify it
        // yields image-2 exactly (not image-1) through its public read().
        expect(putSource.size).toBe(image2Bytes.length);
        expect(
            Buffer.from(await putSource.read(0, putSource.size)).equals(Buffer.from(image2Bytes)),
        ).toBe(true);
        expect(putMd5).toBe(image2Md5);

        // Decode the extend bytes; uKey + fileUuid must come from image-2's
        // response, ipv4s must come from image-2's response.
        const extend = protobuf_decode<NTV2RichMediaHighwayExt>(putExtend);
        expect(extend.uKey).toBe('ukey-image-2');
        expect(extend.fileUuid).toBe('uuid-2');
        expect(extend.msgInfoBody?.[0]?.index?.fileUuid).toBe('uuid-2');
        expect(extend.network?.ipv4s?.length).toBeGreaterThan(0);
    });

    it('image 2 fetches its own fresh session (no leftover from a prior call)', async () => {
        // Both images hit the highway PUT path. The pipeline must call
        // fetchHighwaySession once PER runNtv2Upload (not share session
        // across calls), matching NapCat's per-context lifetime semantics
        // would actually be a future optimisation, but for now correctness
        // = "session is non-null when PUT runs".
        const ok = encodeOidbResponse({
            upload: {
                uKey: 'ukey',
                ipv4s: [{ outIp: 1, outPort: 80 }],
                msgInfo: { msgInfoBody: [{ index: { fileUuid: 'u' } }], extBizInfo: {} },
            },
        });
        const bridge = makeBridge([ok, ok]);

        const uploads: MediaSubFileUpload[] = [
            {
                source: 'top',
                cmdId: 1004,
                bytes: Buffer.from([1, 2, 3]),
                md5: new Uint8Array(16),
                sha1: new Uint8Array(20),
                fastOnlyError: 'image fast-upload not available',
            },
        ];

        await runNtv2Upload({
            ...baseParams(bridge),
            uploadInfo: [{ fileInfo: { fileName: 'a.jpg' }, subFileType: 0 }],
            uploads,
            label: 'image',
        });
        await runNtv2Upload({
            ...baseParams(bridge),
            uploadInfo: [{ fileInfo: { fileName: 'b.jpg' }, subFileType: 0 }],
            uploads,
            label: 'image',
        });

        expect(highway.fetchHighwaySession).toHaveBeenCalledTimes(2);
        expect(highway.uploadHighwayHttp).toHaveBeenCalledTimes(2);

        // The session object passed to the PUT must be non-null both times.
        for (const call of vi.mocked(highway.uploadHighwayHttp).mock.calls) {
            const session = call[1];
            expect(session).toBeDefined();
            expect((session as any).sigSession).toBeDefined();
        }
    });

    it("image 2's OIDB request body carries image-2's fileInfo (not image-1's)", async () => {
        // Catches a hypothetical bug where someone mutates a shared body
        // object across calls. Today the pipeline always builds a fresh
        // body, but the regression is cheap to guard.
        const ok = encodeOidbResponse({
            upload: { msgInfo: { msgInfoBody: [], extBizInfo: {} } },
        });
        const bridge = makeBridge([ok, ok]);

        await runNtv2Upload({
            ...baseParams(bridge),
            uploadInfo: [{ fileInfo: { fileName: 'first.jpg', fileSize: 100 }, subFileType: 0 }],
            uploads: [],
            label: 'image',
        });
        await runNtv2Upload({
            ...baseParams(bridge),
            uploadInfo: [{ fileInfo: { fileName: 'second.jpg', fileSize: 200 }, subFileType: 0 }],
            uploads: [],
            label: 'image',
        });

        expect(bridge.sendRawPacket).toHaveBeenCalledTimes(2);
        const body1 = protobuf_decode<OidbBase<NTV2UploadRichMediaReq>>(
            bridge.sendRawPacket.mock.calls[0]![1],
        );
        const body2 = protobuf_decode<OidbBase<NTV2UploadRichMediaReq>>(
            bridge.sendRawPacket.mock.calls[1]![1],
        );
        expect(body1.body?.upload?.uploadInfo?.[0]?.fileInfo?.fileName).toBe('first.jpg');
        expect(body2.body?.upload?.uploadInfo?.[0]?.fileInfo?.fileName).toBe('second.jpg');

        // And the clientRandomId is different per call (sanity).
        expect(body1.body?.upload?.clientRandomId).not.toBe(body2.body?.upload?.clientRandomId);
    });
});