import { getMHTdocument } from '../utils'
import { defaultDocumentOptions, DocumentOptions, mergeOptions } from '../internal'
import { defaultMargins, Margins, Orient } from '../templates'
import IRelationFile from './IRelationFile'
import WordFile from './wordFile'

/**
 * 节点文件信息
 */

export default class SectionFileInfo implements IRelationFile {

  /**
   * 编号
   */
  id: string = ''
  /**
   * 目标文件路径
   */
  target: string = ''
  /**
   * html内容
   */
  htmlContent: string = ''
  /**
   * 文档章节配置
   * @private
   */
  private _sectionOption: any

  /**
   * word文件上下文对象引用
   */
  _wordf: WordFile

  get mhtName() {
    return this.target.split('/').pop()
  }

  /**
   * 生成关联文件xml内容
   */
  getRelationXml(): string {
    return `<Relationship Type='http://schemas.openxmlformats.org/officeDocument/2006/relationships/aFChunk' Target='${this.target}' Id='${this.id}' />`
  }

  public constructor(id: string | number, html: string, options: Partial<DocumentOptions>, wordf: WordFile) {
    this._wordf = wordf
    this.id = `htmlChunk${id}`
    this.target = `/word/afchunk${id}.mht`
    this.htmlContent = html
    const documentOptions = mergeOptions(defaultDocumentOptions, options)
    const { orientation, margins } = documentOptions
    const marginsOptions = mergeOptions(defaultMargins, margins)
    let width = 0
    let height = 0
    if (orientation === 'landscape') {
      height = 12240
      width = 15840
    } else {
      width = 12240
      height = 15840
    }
    this._sectionOption = { height, width, orientation, marginsOptions }
  }

  /**
   * 生成MHT内容
   */
  generalMhtDocument() {
    return getMHTdocument(this.htmlContent)
  }

  /**
   * 生成document.xml文件中的openxml文本内容
   */
  documentOPENXML(isLast: boolean = false): string {
    const { width, height, orientation: orient, marginsOptions: margins } = this._sectionOption

    const headerXml = this.getHeaderDocumentXML(isLast)
    const footerXml = this.getFooterDocumentXML(isLast)
    const openXml = `<w:p>
                      <w:altChunk r:id='${this.id}'/>
                  </w:p>`
    const sectPr = `<w:sectPr> ${headerXml} ${footerXml}
                  <w:pgSz w:w='${width}' w:h='${height}' w:orient='${orient}' />
                  <w:pgMar w:top='${margins.top}'
                           w:right='${margins.right}'
                           w:bottom='${margins.bottom}'
                           w:left='${margins.left}'
                           w:header='${margins.header}'
                           w:footer='${margins.footer}'
                           w:gutter='${margins.gutter}'/>
                </w:sectPr>`
    if (isLast) {
      return `${openXml}${sectPr}`
    } else {
      return `${openXml}
              <w:p>
                <w:pPr>${sectPr}</w:pPr>
              </w:p>`
    }

  }

  /**
   * 生成Content_types.xml内容类型引用定义
   */
  getContentTypeXml(): string {
    return `<Override PartName='${this.target}' ContentType='message/rfc822'/>`
  }

  /**
   * 获取页眉xml内容
   * @param isLast
   * @private
   */
  private getHeaderDocumentXML(isLast: boolean = false): string {
    if (this._wordf.headerFile.id) {
      const curIndex = this._wordf.rFileArr.findIndex(r => r.id === this.id)
      if (this._wordf.headerFile.exceptSectionIdx !== -1) {
        if (curIndex === this._wordf.headerFile.exceptSectionIdx) {
          return `<w:headerReference w:type='frist' r:id='rId-empty' />`
        }
      }
      return this._wordf.headerFile.documentOPENXML(isLast)
    }
    return ''
  }

  /**
   * 获取页脚xml内容
   * @param isLast
   * @private
   */
  private getFooterDocumentXML(isLast: boolean = false): string {
    if (this._wordf.footerFile.id) {
      const curIndex = this._wordf.rFileArr.findIndex(r => r.id === this.id)
      if (this._wordf.footerFile.exceptSectionIdx !== -1) {
        if (curIndex === this._wordf.footerFile.exceptSectionIdx) {
          return `<w:footerReference w:type='frist' r:id='rId-empty' />`
        }
      }
      return this._wordf.footerFile.documentOPENXML(isLast)
    }
    return ''
  }


}