const fs = require("fs");
const path = require("path");
const {
  Document, Packer, Paragraph, TextRun, Table, TableRow, TableCell,
  Header, Footer, AlignmentType, HeadingLevel, BorderStyle, WidthType,
  ShadingType, PageNumber, PageBreak,
} = require("docx");

const OUTPUT = path.join(__dirname, "验收环境说明.docx");

const A4_WIDTH = 11906;
const A4_HEIGHT = 16838;
const MARGIN = 1440;
const CONTENT_WIDTH = A4_WIDTH - 2 * MARGIN;

const border = { style: BorderStyle.SINGLE, size: 1, color: "999999" };
const borders = { top: border, bottom: border, left: border, right: border };
const cellMargins = { top: 60, bottom: 60, left: 100, right: 100 };

function makeTable(rows, colWidths) {
  if (!colWidths) {
    const colCount = rows[0].length;
    const cw = Math.floor(CONTENT_WIDTH / colCount);
    colWidths = Array(colCount).fill(cw);
    colWidths[colCount - 1] = CONTENT_WIDTH - cw * (colCount - 1);
  }

  return new Table({
    width: { size: CONTENT_WIDTH, type: WidthType.DXA },
    columnWidths: colWidths,
    rows: rows.map((row, rowIdx) =>
      new TableRow({
        children: row.map((cell, colIdx) =>
          new TableCell({
            borders,
            width: { size: colWidths[colIdx], type: WidthType.DXA },
            margins: cellMargins,
            ...(rowIdx === 0 ? { shading: { fill: "D5E8F0", type: ShadingType.CLEAR } } : {}),
            children: [
              new Paragraph({
                children: [
                  new TextRun({
                    text: cell.replace(/\*\*/g, ""),
                    font: "SimSun",
                    size: 22,
                    bold: rowIdx === 0,
                  }),
                ],
                spacing: { line: 300 },
              }),
            ],
          })
        ),
      })
    ),
  });
}

const doc = new Document({
  styles: {
    default: { document: { run: { font: "SimSun", size: 24 } } },
    paragraphStyles: [
      {
        id: "Heading1", name: "Heading 1", basedOn: "Normal", next: "Normal", quickFormat: true,
        run: { size: 44, bold: true, font: "SimHei" },
        paragraph: { spacing: { before: 360, after: 240 }, outlineLevel: 0 },
      },
      {
        id: "Heading2", name: "Heading 2", basedOn: "Normal", next: "Normal", quickFormat: true,
        run: { size: 32, bold: true, font: "SimHei" },
        paragraph: { spacing: { before: 240, after: 160 }, outlineLevel: 1 },
      },
    ],
  },
  sections: [
    {
      properties: {
        page: {
          size: { width: A4_WIDTH, height: A4_HEIGHT },
          margin: { top: MARGIN, right: MARGIN, bottom: MARGIN, left: MARGIN },
        },
      },
      headers: {
        default: new Header({
          children: [
            new Paragraph({
              children: [new TextRun({ text: "陇耘鲜达系统验收环境说明", font: "SimSun", size: 18, color: "888888" })],
              alignment: AlignmentType.CENTER,
            }),
          ],
        }),
      },
      footers: {
        default: new Footer({
          children: [
            new Paragraph({
              children: [
                new TextRun({ text: "第 ", font: "SimSun", size: 18, color: "888888" }),
                new TextRun({ children: [PageNumber.CURRENT], font: "SimSun", size: 18, color: "888888" }),
                new TextRun({ text: " 页", font: "SimSun", size: 18, color: "888888" }),
              ],
              alignment: AlignmentType.CENTER,
            }),
          ],
        }),
      },
      children: [
        new Paragraph({
          children: [new TextRun({ text: "陇耘鲜达系统验收环境说明", font: "SimHei", size: 44, bold: true })],
          alignment: AlignmentType.CENTER,
          spacing: { after: 360 },
        }),

        makeTable([
          ["项目", "内容"],
          ["文档名称", "陇耘鲜达系统验收环境说明"],
          ["版本", "v1.0"],
          ["日期", "2026-05-07"],
          ["关联文档", "陇耘鲜达系统操作手册 v1.0"],
        ]),

        new Paragraph({ children: [new PageBreak()] }),

        new Paragraph({
          heading: HeadingLevel.HEADING_2,
          children: [new TextRun({ text: "系统访问信息", font: "SimHei", size: 32, bold: true })],
          spacing: { before: 240, after: 160 },
        }),

        makeTable([
          ["项目", "地址"],
          ["Web 运营端", "[待填写]"],
          ["小程序 H5 预览", "[待填写]"],
          ["后端 API", "[待填写]"],
        ]),

        new Paragraph({ children: [new PageBreak()] }),

        new Paragraph({
          heading: HeadingLevel.HEADING_2,
          children: [new TextRun({ text: "演示账号", font: "SimHei", size: 32, bold: true })],
          spacing: { before: 240, after: 160 },
        }),

        makeTable([
          ["角色", "用户名", "密码", "说明"],
          ["Web 超级管理员", "[待填写]", "[待填写]", "验证运营端全部菜单与功能"],
          ["客户端账号", "[待填写]", "[待填写]", "验证小程序客户端下单、支付等功能"],
          ["供应商端账号", "[待填写]", "[待填写]", "验证小程序供应商端商品管理、接单等功能"],
          ["配送员端账号", "[待填写]", "[待填写]", "验证小程序配送员端接单、配送等功能"],
        ]),

        new Paragraph({ children: [new PageBreak()] }),

        new Paragraph({
          heading: HeadingLevel.HEADING_2,
          children: [new TextRun({ text: "客户端环境要求", font: "SimHei", size: 32, bold: true })],
          spacing: { before: 240, after: 160 },
        }),

        makeTable([
          ["项目", "要求"],
          ["浏览器", "Chrome 90+ 或其他现代浏览器"],
          ["小程序", "微信 7.0+ 或 H5 浏览器预览"],
          ["Web 分辨率", "1920×1080"],
          ["小程序模拟", "iPhone 尺寸"],
        ]),

        new Paragraph({ children: [new PageBreak()] }),

        new Paragraph({
          heading: HeadingLevel.HEADING_2,
          children: [new TextRun({ text: "数据说明", font: "SimHei", size: 32, bold: true })],
          spacing: { before: 240, after: 160 },
        }),

        new Paragraph({
          children: [
            new TextRun({ text: "演示数据范围：", font: "SimSun", size: 24, bold: true }),
            new TextRun({ text: "系统已预置测试区域、测试商品、测试订单等数据，覆盖操作手册所述主要业务场景。", font: "SimSun", size: 24 }),
          ],
          spacing: { line: 360 },
        }),

        new Paragraph({
          children: [
            new TextRun({ text: "截图来源：", font: "SimSun", size: 24, bold: true }),
            new TextRun({ text: "操作手册中的截图均取自 H5 本地预览环境，实际小程序界面以微信端为准。", font: "SimSun", size: 24 }),
          ],
          spacing: { line: 360 },
        }),

        new Paragraph({ children: [new PageBreak()] }),

        new Paragraph({
          heading: HeadingLevel.HEADING_2,
          children: [new TextRun({ text: "保密说明", font: "SimHei", size: 32, bold: true })],
          spacing: { before: 240, after: 160 },
        }),

        new Paragraph({
          children: [new TextRun({ text: "本文档包含系统访问地址与演示账号信息，仅供项目验收期间使用。验收完成后，相关账号应及时回收或销毁，本文档不再分发。", font: "SimSun", size: 24 })],
          spacing: { line: 360 },
        }),
      ],
    },
  ],
});

Packer.toBuffer(doc).then(buffer => {
  fs.writeFileSync(OUTPUT, buffer);
  console.log(`✅ Environment spec saved to: ${OUTPUT}`);
  console.log(`   Size: ${(buffer.length / 1024).toFixed(1)} KB`);
});