import { Document, Packer, Paragraph, ImageRun, TextRun, HeadingLevel } from "docx"

interface Screenshot {
  id: string
  name: string
  url: string
  dataUrl?: string
  timestamp: Date
  status: string
}

interface DocumentSettings {
  title: string
  author: string
  description: string
  includeTimestamp: boolean
  includePageUrls: boolean
  imageFormat: string
  imageQuality: number
  pageSize: string
  orientation: string
}

export async function generateDocx(screenshots: Screenshot[], settings: DocumentSettings): Promise<ArrayBuffer> {
  try {
    const children: Paragraph[] = []

    // 添加标题
    children.push(
      new Paragraph({
        children: [
          new TextRun({
            text: settings.title,
            bold: true,
            size: 32,
          }),
        ],
        heading: HeadingLevel.TITLE,
      }),
    )

    // 添加描述
    if (settings.description) {
      children.push(
        new Paragraph({
          children: [
            new TextRun({
              text: settings.description,
              size: 24,
            }),
          ],
        }),
      )
    }

    // 添加生成信息
    if (settings.includeTimestamp) {
      children.push(
        new Paragraph({
          children: [
            new TextRun({
              text: `生成时间: ${new Date().toLocaleString()}`,
              size: 20,
              italics: true,
            }),
          ],
        }),
      )
    }

    children.push(
      new Paragraph({
        children: [
          new TextRun({
            text: `作者: ${settings.author}`,
            size: 20,
            italics: true,
          }),
        ],
      }),
    )

    // 添加分隔符
    children.push(
      new Paragraph({
        children: [
          new TextRun({
            text: "─".repeat(50),
            size: 20,
          }),
        ],
      }),
    )

    // 添加每个截图
    for (const screenshot of screenshots) {
      // 页面标题
      children.push(
        new Paragraph({
          children: [
            new TextRun({
              text: screenshot.name,
              bold: true,
              size: 28,
            }),
          ],
          heading: HeadingLevel.HEADING_1,
        }),
      )

      // 页面URL
      if (settings.includePageUrls) {
        children.push(
          new Paragraph({
            children: [
              new TextRun({
                text: `页面地址: ${screenshot.url}`,
                size: 20,
                color: "666666",
              }),
            ],
          }),
        )
      }

      // 截图时间
      if (settings.includeTimestamp) {
        children.push(
          new Paragraph({
            children: [
              new TextRun({
                text: `截图时间: ${screenshot.timestamp.toLocaleString()}`,
                size: 20,
                color: "666666",
              }),
            ],
          }),
        )
      }

      // 添加截图
      if (screenshot.dataUrl) {
        try {
          // 将 dataUrl 转换为 ArrayBuffer
          const base64Data = screenshot.dataUrl.split(",")[1]
          const binaryString = atob(base64Data)
          const bytes = new Uint8Array(binaryString.length)
          for (let i = 0; i < binaryString.length; i++) {
            bytes[i] = binaryString.charCodeAt(i)
          }

          children.push(
            new Paragraph({
              children: [
                new ImageRun({
                  data: bytes,
                  transformation: {
                    width: 600,
                    height: 400,
                  },
                }),
              ],
            }),
          )
        } catch (error) {
          console.error("添加图片失败:", error)
          children.push(
            new Paragraph({
              children: [
                new TextRun({
                  text: "[图片加载失败]",
                  color: "FF0000",
                  italics: true,
                }),
              ],
            }),
          )
        }
      }

      // 添加分隔符
      children.push(
        new Paragraph({
          children: [
            new TextRun({
              text: "",
            }),
          ],
        }),
      )
    }

    // 创建文档
    const doc = new Document({
      sections: [
        {
          properties: {},
          children: children,
        },
      ],
    })

    // 生成文档
    const buffer = await Packer.toBuffer(doc)
    return buffer
  } catch (error) {
    console.error("生成文档失败:", error)
    throw new Error(`文档生成失败: ${error instanceof Error ? error.message : "未知错误"}`)
  }
}