import { readFileSync } from 'node:fs';
import { createRequire } from 'node:module';
import { resolve } from 'node:path';
import { describe, expect, it } from 'vitest';

const require = createRequire(import.meta.url);
const { parseTableByFileName, parseXlsxBuffer } = require('../miniapp/utils/sankey.js') as {
  parseTableByFileName: (fileName: string, payload: string | ArrayBuffer) => {
    headers: string[];
    rows: string[][];
  };
  parseXlsxBuffer: (buffer: ArrayBuffer) => {
    headers: string[];
    rows: string[][];
  };
};

describe('miniapp utils sankey', () => {
  it('按文件后缀分流解析 csv', () => {
    const table = parseTableByFileName('demo.csv', 'source,value,target\nA,12,T1');
    expect(table.headers).toEqual(['source', 'value', 'target']);
    expect(table.rows).toEqual([['A', '12', 'T1']]);
  });

  it('按文件后缀分流解析 xlsx', () => {
    const filePath = resolve(process.cwd(), 'data/example0.xlsx');
    const buffer = readFileSync(filePath);
    const arrayBuffer = buffer.buffer.slice(buffer.byteOffset, buffer.byteOffset + buffer.byteLength);
    const table = parseTableByFileName('demo.xlsx', arrayBuffer);

    expect(table.headers.length).toBeGreaterThan(1);
    expect(table.rows.length).toBeGreaterThan(0);
  });

  it('直接解析 xlsx buffer', () => {
    const filePath = resolve(process.cwd(), 'data/example0.xlsx');
    const buffer = readFileSync(filePath);
    const arrayBuffer = buffer.buffer.slice(buffer.byteOffset, buffer.byteOffset + buffer.byteLength);
    const table = parseXlsxBuffer(arrayBuffer);

    expect(table.headers.length).toBeGreaterThan(1);
    expect(table.rows.length).toBeGreaterThan(0);
  });
});