import { strToU8, zipSync } from "fflate";

type XmlParts = Record<string, string>;

interface NodeBufferLike extends Uint8Array {
  toString(encoding?: string): string;
}

const nodeBuffer = (
  globalThis as unknown as {
    Buffer: {
      from(value: string | Uint8Array): NodeBufferLike;
    };
  }
).Buffer;

export interface OoxmlFixture {
  buffer: NodeBufferLike;
  mimeType: string;
  name: string;
}

const XML_DECLARATION =
  '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>';

function packageFixture(
  name: string,
  mimeType: string,
  parts: XmlParts,
): OoxmlFixture {
  const archive = Object.fromEntries(
    Object.entries(parts)
      .sort(([left], [right]) => left.localeCompare(right))
      .map(([path, xml]) => [path, strToU8(xml)]),
  );

  return {
    buffer: nodeBuffer.from(zipSync(archive, { level: 6 })),
    mimeType,
    name,
  };
}

function contentTypes(overrides: string): string {
  return `${XML_DECLARATION}
<Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types">
  <Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/>
  <Default Extension="xml" ContentType="application/xml"/>
  ${overrides}
</Types>`;
}

function rootRelationships(target: string): string {
  return `${XML_DECLARATION}
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="${target}"/>
</Relationships>`;
}

export function createMinimalDocx(): OoxmlFixture {
  return packageFixture(
    "three-page-document.docx",
    "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
    {
      "[Content_Types].xml": contentTypes(`
  <Override PartName="/word/document.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml"/>
  <Override PartName="/word/styles.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.styles+xml"/>`),
      "_rels/.rels": rootRelationships("word/document.xml"),
      "word/_rels/document.xml.rels": `${XML_DECLARATION}
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles" Target="styles.xml"/>
</Relationships>`,
      "word/styles.xml": `${XML_DECLARATION}
<w:styles xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main">
  <w:docDefaults>
    <w:rPrDefault><w:rPr><w:sz w:val="24"/><w:szCs w:val="24"/></w:rPr></w:rPrDefault>
    <w:pPrDefault><w:pPr/></w:pPrDefault>
  </w:docDefaults>
  <w:style w:type="paragraph" w:default="1" w:styleId="Normal">
    <w:name w:val="Normal"/><w:qFormat/>
  </w:style>
  <w:style w:type="paragraph" w:styleId="Title">
    <w:name w:val="Title"/><w:basedOn w:val="Normal"/><w:next w:val="Normal"/>
    <w:rPr><w:b/><w:sz w:val="36"/></w:rPr>
  </w:style>
</w:styles>`,
      "word/document.xml": `${XML_DECLARATION}
<w:document xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main">
  <w:body>
    <w:p>
      <w:pPr><w:pStyle w:val="Title"/></w:pPr>
      <w:r><w:t>Office Tools Document Fixture</w:t></w:r>
    </w:p>
    <w:p><w:r><w:t>This text is rendered from a project-authored DOCX package.</w:t></w:r></w:p>
    <w:tbl>
      <w:tblPr><w:tblW w:w="0" w:type="auto"/></w:tblPr>
      <w:tblGrid><w:gridCol w:w="3600"/><w:gridCol w:w="3600"/></w:tblGrid>
      <w:tr>
        <w:tc><w:p><w:r><w:t>Feature</w:t></w:r></w:p></w:tc>
        <w:tc><w:p><w:r><w:t>Status</w:t></w:r></w:p></w:tc>
      </w:tr>
      <w:tr>
        <w:tc><w:p><w:r><w:t>Local viewing</w:t></w:r></w:p></w:tc>
        <w:tc><w:p><w:r><w:t>Ready</w:t></w:r></w:p></w:tc>
      </w:tr>
    </w:tbl>
    <w:p><w:r><w:br w:type="page"/></w:r></w:p>
    <w:p><w:r><w:t>Second Page Search Marker</w:t></w:r></w:p>
    <w:p><w:r><w:t>Navigation reaches this independently laid-out page.</w:t></w:r></w:p>
    <w:p><w:r><w:br w:type="page"/></w:r></w:p>
    <w:p><w:r><w:t>Third page trailing marker</w:t></w:r></w:p>
    <w:p><w:r><w:t>This trailing page makes the middle page a stable scroll target.</w:t></w:r></w:p>
    <w:sectPr>
      <w:pgSz w:w="12240" w:h="15840"/>
      <w:pgMar w:top="1440" w:right="1440" w:bottom="1440" w:left="1440" w:header="720" w:footer="720" w:gutter="0"/>
    </w:sectPr>
  </w:body>
</w:document>`,
    },
  );
}

export function createMinimalXlsx(): OoxmlFixture {
  return packageFixture(
    "two-sheet-workbook.xlsx",
    "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    {
      "[Content_Types].xml": contentTypes(`
  <Override PartName="/xl/workbook.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml"/>
  <Override PartName="/xl/worksheets/sheet1.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"/>
  <Override PartName="/xl/worksheets/sheet2.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"/>
  <Override PartName="/xl/sharedStrings.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml"/>
  <Override PartName="/xl/styles.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml"/>`),
      "_rels/.rels": rootRelationships("xl/workbook.xml"),
      "xl/workbook.xml": `${XML_DECLARATION}
<workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships">
  <bookViews><workbookView xWindow="0" yWindow="0" windowWidth="18000" windowHeight="10000"/></bookViews>
  <sheets>
    <sheet name="Summary" sheetId="1" state="visible" r:id="rId1"/>
    <sheet name="Details" sheetId="2" state="visible" r:id="rId2"/>
  </sheets>
  <calcPr calcId="191029"/>
</workbook>`,
      "xl/_rels/workbook.xml.rels": `${XML_DECLARATION}
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet" Target="worksheets/sheet1.xml"/>
  <Relationship Id="rId2" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet" Target="worksheets/sheet2.xml"/>
  <Relationship Id="rId3" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles" Target="styles.xml"/>
  <Relationship Id="rId4" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings" Target="sharedStrings.xml"/>
</Relationships>`,
      "xl/sharedStrings.xml": `${XML_DECLARATION}
<sst xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" count="6" uniqueCount="6">
  <si><t>Office Tools Workbook Fixture</t></si>
  <si><t>Amount</t></si>
  <si><t>Total</t></si>
  <si><t>Details Sheet Search Marker</t></si>
  <si><t>Item</t></si>
  <si><t>Quantity</t></si>
</sst>`,
      "xl/styles.xml": `${XML_DECLARATION}
<styleSheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">
  <fonts count="2">
    <font><sz val="11"/><name val="Calibri"/><family val="2"/><scheme val="minor"/></font>
    <font><b/><sz val="11"/><name val="Calibri"/><family val="2"/><scheme val="minor"/></font>
  </fonts>
  <fills count="2"><fill><patternFill patternType="none"/></fill><fill><patternFill patternType="gray125"/></fill></fills>
  <borders count="1"><border><left/><right/><top/><bottom/><diagonal/></border></borders>
  <cellStyleXfs count="1"><xf numFmtId="0" fontId="0" fillId="0" borderId="0"/></cellStyleXfs>
  <cellXfs count="2">
    <xf numFmtId="0" fontId="0" fillId="0" borderId="0" xfId="0"/>
    <xf numFmtId="0" fontId="1" fillId="0" borderId="0" xfId="0" applyFont="1"/>
  </cellXfs>
  <cellStyles count="1"><cellStyle name="Normal" xfId="0" builtinId="0"/></cellStyles>
</styleSheet>`,
      "xl/worksheets/sheet1.xml": `${XML_DECLARATION}
<worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">
  <dimension ref="A1:B4"/>
  <sheetViews><sheetView workbookViewId="0"><selection activeCell="A1" sqref="A1"/></sheetView></sheetViews>
  <sheetFormatPr defaultRowHeight="15"/>
  <cols><col min="1" max="1" width="34" customWidth="1"/><col min="2" max="2" width="14" customWidth="1"/></cols>
  <sheetData>
    <row r="1"><c r="A1" s="1" t="s"><v>0</v></c></row>
    <row r="2"><c r="A2" s="1" t="s"><v>1</v></c></row>
    <row r="3"><c r="A3" t="n"><v>19</v></c><c r="B3" t="n"><v>23</v></c></row>
    <row r="4"><c r="A4" s="1" t="s"><v>2</v></c><c r="B4"><f>SUM(A3:B3)</f><v>42</v></c></row>
  </sheetData>
  <pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/>
</worksheet>`,
      "xl/worksheets/sheet2.xml": `${XML_DECLARATION}
<worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">
  <dimension ref="A1:B3"/>
  <sheetViews><sheetView workbookViewId="0"><selection activeCell="A1" sqref="A1"/></sheetView></sheetViews>
  <sheetFormatPr defaultRowHeight="15"/>
  <cols><col min="1" max="1" width="34" customWidth="1"/><col min="2" max="2" width="14" customWidth="1"/></cols>
  <sheetData>
    <row r="1"><c r="A1" s="1" t="s"><v>3</v></c></row>
    <row r="2"><c r="A2" s="1" t="s"><v>4</v></c><c r="B2" s="1" t="s"><v>5</v></c></row>
    <row r="3"><c r="A3" t="inlineStr"><is><t>Local parser</t></is></c><c r="B3" t="n"><v>2</v></c></row>
  </sheetData>
  <pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/>
</worksheet>`,
    },
  );
}

const PRESENTATION_NS =
  'xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"';

function slideXml(title: string, body: string): string {
  return `${XML_DECLARATION}
<p:sld ${PRESENTATION_NS}>
  <p:cSld>
    <p:spTree>
      <p:nvGrpSpPr><p:cNvPr id="1" name=""/><p:cNvGrpSpPr/><p:nvPr/></p:nvGrpSpPr>
      <p:grpSpPr><a:xfrm><a:off x="0" y="0"/><a:ext cx="0" cy="0"/><a:chOff x="0" y="0"/><a:chExt cx="0" cy="0"/></a:xfrm></p:grpSpPr>
      <p:sp>
        <p:nvSpPr><p:cNvPr id="2" name="Fixture title"/><p:cNvSpPr/><p:nvPr/></p:nvSpPr>
        <p:spPr>
          <a:xfrm><a:off x="685800" y="685800"/><a:ext cx="7772400" cy="914400"/></a:xfrm>
          <a:prstGeom prst="rect"><a:avLst/></a:prstGeom><a:noFill/><a:ln><a:noFill/></a:ln>
        </p:spPr>
        <p:txBody><a:bodyPr/><a:lstStyle/><a:p><a:r><a:rPr lang="en-US" sz="2800" b="1"/><a:t>${title}</a:t></a:r><a:endParaRPr lang="en-US"/></a:p></p:txBody>
      </p:sp>
      <p:sp>
        <p:nvSpPr><p:cNvPr id="3" name="Fixture body"/><p:cNvSpPr/><p:nvPr/></p:nvSpPr>
        <p:spPr>
          <a:xfrm><a:off x="914400" y="2057400"/><a:ext cx="7315200" cy="2286000"/></a:xfrm>
          <a:prstGeom prst="roundRect"><a:avLst/></a:prstGeom>
          <a:solidFill><a:srgbClr val="E8F0FE"/></a:solidFill><a:ln><a:solidFill><a:srgbClr val="356AC3"/></a:solidFill></a:ln>
        </p:spPr>
        <p:txBody><a:bodyPr lIns="228600" rIns="228600" tIns="228600" bIns="228600"/><a:lstStyle/><a:p><a:r><a:rPr lang="en-US" sz="1800"/><a:t>${body}</a:t></a:r><a:endParaRPr lang="en-US"/></a:p></p:txBody>
      </p:sp>
    </p:spTree>
  </p:cSld>
  <p:clrMapOvr><a:masterClrMapping/></p:clrMapOvr>
</p:sld>`;
}

function slideRelationships(): string {
  return `${XML_DECLARATION}
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideLayout" Target="../slideLayouts/slideLayout1.xml"/>
</Relationships>`;
}

export function createMinimalPptx(): OoxmlFixture {
  return packageFixture(
    "two-slide-presentation.pptx",
    "application/vnd.openxmlformats-officedocument.presentationml.presentation",
    {
      "[Content_Types].xml": contentTypes(`
  <Override PartName="/ppt/presentation.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.presentation.main+xml"/>
  <Override PartName="/ppt/slides/slide1.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slide+xml"/>
  <Override PartName="/ppt/slides/slide2.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slide+xml"/>
  <Override PartName="/ppt/slideLayouts/slideLayout1.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"/>
  <Override PartName="/ppt/slideMasters/slideMaster1.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideMaster+xml"/>
  <Override PartName="/ppt/theme/theme1.xml" ContentType="application/vnd.openxmlformats-officedocument.theme+xml"/>`),
      "_rels/.rels": rootRelationships("ppt/presentation.xml"),
      "ppt/presentation.xml": `${XML_DECLARATION}
<p:presentation ${PRESENTATION_NS}>
  <p:sldMasterIdLst><p:sldMasterId id="2147483648" r:id="rId1"/></p:sldMasterIdLst>
  <p:sldIdLst><p:sldId id="256" r:id="rId2"/><p:sldId id="257" r:id="rId3"/></p:sldIdLst>
  <p:sldSz cx="9144000" cy="5143500" type="screen16x9"/>
  <p:notesSz cx="6858000" cy="9144000"/>
</p:presentation>`,
      "ppt/_rels/presentation.xml.rels": `${XML_DECLARATION}
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideMaster" Target="slideMasters/slideMaster1.xml"/>
  <Relationship Id="rId2" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide" Target="slides/slide1.xml"/>
  <Relationship Id="rId3" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide" Target="slides/slide2.xml"/>
</Relationships>`,
      "ppt/slides/slide1.xml": slideXml(
        "Office Tools Presentation Fixture",
        "This first slide is rendered entirely in the browser.",
      ),
      "ppt/slides/slide2.xml": slideXml(
        "Second Slide Search Marker",
        "Navigation reaches the second project-authored slide.",
      ),
      "ppt/slides/_rels/slide1.xml.rels": slideRelationships(),
      "ppt/slides/_rels/slide2.xml.rels": slideRelationships(),
      "ppt/slideLayouts/slideLayout1.xml": `${XML_DECLARATION}
<p:sldLayout ${PRESENTATION_NS} type="blank" preserve="1">
  <p:cSld name="Blank"><p:spTree><p:nvGrpSpPr><p:cNvPr id="1" name=""/><p:cNvGrpSpPr/><p:nvPr/></p:nvGrpSpPr><p:grpSpPr><a:xfrm><a:off x="0" y="0"/><a:ext cx="0" cy="0"/><a:chOff x="0" y="0"/><a:chExt cx="0" cy="0"/></a:xfrm></p:grpSpPr></p:spTree></p:cSld>
  <p:clrMapOvr><a:masterClrMapping/></p:clrMapOvr>
</p:sldLayout>`,
      "ppt/slideLayouts/_rels/slideLayout1.xml.rels": `${XML_DECLARATION}
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideMaster" Target="../slideMasters/slideMaster1.xml"/>
</Relationships>`,
      "ppt/slideMasters/slideMaster1.xml": `${XML_DECLARATION}
<p:sldMaster ${PRESENTATION_NS}>
  <p:cSld><p:spTree><p:nvGrpSpPr><p:cNvPr id="1" name=""/><p:cNvGrpSpPr/><p:nvPr/></p:nvGrpSpPr><p:grpSpPr><a:xfrm><a:off x="0" y="0"/><a:ext cx="0" cy="0"/><a:chOff x="0" y="0"/><a:chExt cx="0" cy="0"/></a:xfrm></p:grpSpPr></p:spTree></p:cSld>
  <p:clrMap accent1="accent1" accent2="accent2" accent3="accent3" accent4="accent4" accent5="accent5" accent6="accent6" bg1="lt1" bg2="lt2" folHlink="folHlink" hlink="hlink" tx1="dk1" tx2="dk2"/>
  <p:sldLayoutIdLst><p:sldLayoutId id="1" r:id="rId1"/></p:sldLayoutIdLst>
  <p:txStyles><p:titleStyle/><p:bodyStyle/><p:otherStyle/></p:txStyles>
</p:sldMaster>`,
      "ppt/slideMasters/_rels/slideMaster1.xml.rels": `${XML_DECLARATION}
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideLayout" Target="../slideLayouts/slideLayout1.xml"/>
  <Relationship Id="rId2" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme" Target="../theme/theme1.xml"/>
</Relationships>`,
      "ppt/theme/theme1.xml": `${XML_DECLARATION}
<a:theme xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" name="Office Tools Fixture">
  <a:themeElements>
    <a:clrScheme name="Fixture">
      <a:dk1><a:sysClr val="windowText" lastClr="000000"/></a:dk1><a:lt1><a:sysClr val="window" lastClr="FFFFFF"/></a:lt1>
      <a:dk2><a:srgbClr val="1F2937"/></a:dk2><a:lt2><a:srgbClr val="F8FAFC"/></a:lt2>
      <a:accent1><a:srgbClr val="356AC3"/></a:accent1><a:accent2><a:srgbClr val="D97706"/></a:accent2>
      <a:accent3><a:srgbClr val="059669"/></a:accent3><a:accent4><a:srgbClr val="7C3AED"/></a:accent4>
      <a:accent5><a:srgbClr val="0891B2"/></a:accent5><a:accent6><a:srgbClr val="DB2777"/></a:accent6>
      <a:hlink><a:srgbClr val="0563C1"/></a:hlink><a:folHlink><a:srgbClr val="954F72"/></a:folHlink>
    </a:clrScheme>
    <a:fontScheme name="Fixture"><a:majorFont><a:latin typeface="Arial"/><a:ea typeface=""/><a:cs typeface=""/></a:majorFont><a:minorFont><a:latin typeface="Arial"/><a:ea typeface=""/><a:cs typeface=""/></a:minorFont></a:fontScheme>
    <a:fmtScheme name="Fixture"><a:fillStyleLst><a:solidFill><a:schemeClr val="phClr"/></a:solidFill></a:fillStyleLst><a:lnStyleLst><a:ln w="9525"><a:solidFill><a:schemeClr val="phClr"/></a:solidFill></a:ln></a:lnStyleLst><a:effectStyleLst><a:effectStyle><a:effectLst/></a:effectStyle></a:effectStyleLst><a:bgFillStyleLst><a:solidFill><a:schemeClr val="phClr"/></a:solidFill></a:bgFillStyleLst></a:fmtScheme>
  </a:themeElements>
</a:theme>`,
    },
  );
}

export function createMalformedDocx(): OoxmlFixture {
  return {
    buffer: nodeBuffer.from("This is deliberately not an OOXML ZIP package."),
    mimeType:
      "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
    name: "malformed-document.docx",
  };
}