import { readFileSync } from 'node:fs';
import { fileURLToPath } from 'node:url';
import { describe, expect, it } from 'vitest';
import { protobuf_decode, protobuf_encode } from '@snowluma/proton';
import { decodeRichBody } from '../../src/msg-push/rich-body-decoder';
import type { MessageBody, PushMsg } from '@snowluma/proto-defs/message';
import type { MarkdownData } from '@snowluma/proto-defs/action';

// Build a svc=45 richui markdown commonElem carrying a FlashTransfer card, the
// way older QQ clients (≤9.9.30) deliver a 闪传 file (#199/#200).
function flashBody(json: unknown): MessageBody {
    const markdown = `[闪传](mqqapi://markdown/node?nodeType=richui&json=${encodeURIComponent(JSON.stringify(json))})`;
    const pbElem = protobuf_encode<MarkdownData>({ content: markdown });
    return {
        richText: {
            elems: [{ commonElem: { serviceType: 45, businessType: 3, pbElem } } as never],
        },
    };
}

describe('decodeRichBody / 闪传 flash_file (#199/#200)', () => {
    it('extracts filesetId, title, sceneType from a nested FlashTransfer card', () => {
        const out = decodeRichBody(
            flashBody({
                busId: 'FlashTransfer',
                templateId: 'flash',
                version: 2,
                layout: { viewId: 'flash_file', width: -2, height: -2 },
                data: { fileSetId: 'fs-abc-123', title: 'report.pdf', sceneType: 2 },
            }),
            true,
        );
        expect(out).toEqual([
            { type: 'flash_file', filesetId: 'fs-abc-123', fileName: 'report.pdf', sceneType: 2 },
        ]);
    });

    it('recursive search finds the fields at any depth + accepts the filesetId alias', () => {
        const out = decodeRichBody(
            flashBody({
                busId: 'FlashTransfer',
                templateId: 'flash',
                layout: { deep: { nested: { filesetId: 'fs-deep', name: 'a.zip' } } },
            }),
            true,
        );
        expect(out).toEqual([
            { type: 'flash_file', filesetId: 'fs-deep', fileName: 'a.zip', sceneType: 0 },
        ]);
    });

    it('drops a malformed card that has no fileset identity', () => {
        const out = decodeRichBody(
            flashBody({ busId: 'FlashTransfer', templateId: 'flash' }),
            true,
        );
        expect(out).toEqual([]);
    });

    it('does not misclassify a non-FlashTransfer markdown card as flash_file', () => {
        const out = decodeRichBody(
            flashBody({ busId: 'SomethingElse', templateId: 'button' }),
            true,
        );
        expect(out.some((e) => e.type === 'flash_file')).toBe(false);
        expect(out[0]?.type).toBe('markdown');
    });
});

// Current NT cards (#358) put fileset identity on MarkdownData.extInfo
// (extType=1 / DecodeMdExtInfoFileTransfer) and in the click scheme. The
// richui JSON no longer has `data.fileSetId`.
function currentNtFlashBody(
    json: unknown,
    ext?: MarkdownData['extInfo'],
    summary?: string,
): MessageBody {
    const markdown = `[闪传](mqqapi://markdown/node?nodeType=richui&json=${encodeURIComponent(JSON.stringify(json))})`;
    const pbElem = protobuf_encode<MarkdownData>({
        content: markdown,
        summary,
        extType: ext ? 1 : undefined,
        extInfo: ext,
    });
    return {
        richText: {
            elems: [{ commonElem: { serviceType: 45, businessType: 3, pbElem } } as never],
        },
    };
}

const currentNtCardJson = {
    busId: 'FlashTransfer',
    templateId: 'flash',
    version: 2,
    layout: { viewId: 'flash_file', width: -2, height: -2, direction: 'horizontal' },
    attributes: {
        viewId: 'flash_file',
        attributes: [
            {
                viewId: 'file',
                scheme: 'mqqrouter://flash_transfer/open_fileset?fileset_id=fs-nt-358&version=1&channel_id=1&src_type=internal&scene_type=1',
            },
        ],
    },
};

describe('decodeRichBody / 闪传 flash_file (#358 current NT card)', () => {
    it('reads filesetId and name from markdown extInfo when the JSON has no data.fileSetId', () => {
        const out = decodeRichBody(
            currentNtFlashBody(
                currentNtCardJson,
                {
                    filesetId: 'fs-nt-358',
                    name: 'cpwd截图.zip',
                    fileSize: 9196055,
                    expireTime: 1787815533,
                },
                '[QQ闪传] cpwd截图.zip',
            ),
            true,
        );
        expect(out).toEqual([
            {
                type: 'flash_file',
                filesetId: 'fs-nt-358',
                fileName: 'cpwd截图.zip',
                sceneType: 1,
            },
        ]);
    });

    it('reads the cover URL from extInfo.thumbnail', () => {
        const out = decodeRichBody(
            currentNtFlashBody(currentNtCardJson, {
                filesetId: 'fs-nt-358',
                name: 'a.zip',
                thumbnail: {
                    download: { field1: 2, downloadUrl: 'https://example.test/cover.jpg' },
                },
            }),
            true,
        );
        expect(out).toEqual([
            {
                type: 'flash_file',
                filesetId: 'fs-nt-358',
                fileName: 'a.zip',
                sceneType: 1,
                thumbUrl: 'https://example.test/cover.jpg',
            },
        ]);
    });

    it('falls back to the open_fileset scheme when extInfo is absent', () => {
        const out = decodeRichBody(currentNtFlashBody(currentNtCardJson), true);
        expect(out).toEqual([
            {
                type: 'flash_file',
                filesetId: 'fs-nt-358',
                fileName: '',
                sceneType: 1,
            },
        ]);
    });

    it('still decodes from extInfo when the richui JSON is truncated', () => {
        const markdown =
            '[闪传](mqqapi://markdown/node?nodeType=richui&json=%7B%22busId%22%3A%22FlashTransfer%22%2C%22src%22%3A%22';
        const pbElem = protobuf_encode<MarkdownData>({
            content: markdown,
            summary: '[QQ闪传] report.pdf',
            extType: 1,
            extInfo: { filesetId: 'fs-from-ext', name: 'report.pdf' },
        });
        const out = decodeRichBody(
            {
                richText: {
                    elems: [{ commonElem: { serviceType: 45, businessType: 3, pbElem } } as never],
                },
            },
            true,
        );
        expect(out).toEqual([
            {
                type: 'flash_file',
                filesetId: 'fs-from-ext',
                fileName: 'report.pdf',
                sceneType: 0,
            },
        ]);
    });

    it('drops the compatibility text sibling after a successful flash_file decode', () => {
        const markdown = `[闪传](mqqapi://markdown/node?nodeType=richui&json=${encodeURIComponent(JSON.stringify(currentNtCardJson))})`;
        const pbElem = protobuf_encode<MarkdownData>({
            content: markdown,
            extType: 1,
            extInfo: { filesetId: 'fs-nt-358', name: 'a.zip' },
        });
        const out = decodeRichBody(
            {
                richText: {
                    elems: [
                        { commonElem: { serviceType: 45, businessType: 3, pbElem } } as never,
                        { text: { str: '[闪传]' } } as never,
                    ],
                },
            },
            true,
        );
        expect(out).toEqual([
            {
                type: 'flash_file',
                filesetId: 'fs-nt-358',
                fileName: 'a.zip',
                sceneType: 1,
            },
        ]);
    });

    it('decodes the sanitized #358 C2C push (extInfo + open_fileset scheme)', () => {
        const hex = readFileSync(
            fileURLToPath(new URL('./fixtures/issue-358-flash-push.hex', import.meta.url)),
            'utf8',
        ).trim();
        const push = protobuf_decode<PushMsg>(Buffer.from(hex, 'hex'));
        const out = decodeRichBody(push.message?.body, false);
        // Reporter redacted the richui JSON (unterminated src), so scene_type
        // cannot be recovered from the scheme. extInfo still supplies fileset + name
        // and the cover URL (placeholder).
        expect(out).toEqual([
            {
                type: 'flash_file',
                filesetId: '[UUID]',
                fileName: 'cpwd截图.zip',
                sceneType: 0,
                thumbUrl: '[FILE_URL]',
            },
        ]);
    });
});