package handlers

import (
	"archive/zip"
	"fmt"
	"io"
	"os"
	"path/filepath"
	"strings"

	"git.elijahkuntz.com/Elijah/drive/config"
	"git.elijahkuntz.com/Elijah/drive/database"
	"git.elijahkuntz.com/Elijah/drive/middleware"
	"git.elijahkuntz.com/Elijah/drive/workers"
	"github.com/gofiber/fiber/v2"
	"github.com/golang-jwt/jwt/v5"
	"sync"
	"time"
	"mime"
)

type OnlyOfficeHandler struct {
	Config *config.Config
	DB     *database.DB
}

type CallbackRequest struct {
	Status int    `json:"status"`
	Url    string `json:"url"`
	Key    string `json:"key"`
}

func (h *OnlyOfficeHandler) Callback(c *fiber.Ctx) error {
	path := c.Query("path")
	token := c.Query("token")

	if path == "" {
		return c.Status(400).SendString("path required")
	}

	// Validate the token to ensure the callback is authorized.
	// First check if it's a long-lived edit token, fallback to short-lived download token.
	err := middleware.ValidateEditToken(token, h.Config.JWTSecret, "", path)
	if err != nil {
		err = middleware.ValidateDownloadToken(token, h.Config.JWTSecret, "", path)
	}
	if err != nil {
		return c.Status(401).SendString("unauthorized")
	}

	var req CallbackRequest
	if err := c.BodyParser(&req); err != nil {
		return c.Status(400).JSON(fiber.Map{"error": "invalid json"})
	}

	// Status 2: Document is ready for saving
	// Status 6: Document is being edited, force save was triggered
	if req.Status == 2 || req.Status == 6 {
		if req.Url == "" {
			return c.Status(400).JSON(fiber.Map{"error": "url required"})
		}

		// If the server cannot resolve the public URL due to hairpin NAT,
		// we can rewrite it to use the internal Docker IP
		downloadUrl := req.Url

		trustedHosts := []string{h.Config.OnlyOfficeHost}
		if err := validateCallbackURL(downloadUrl, trustedHosts); err != nil {
			return c.Status(403).JSON(fiber.Map{"error": "blocked URL: " + err.Error()})
		}

		// Download modified file from Document Server
		resp, err := SafeHTTPClient.Get(downloadUrl)
		if err != nil {
			return c.Status(500).JSON(fiber.Map{"error": "failed to download file"})
		}
		defer resp.Body.Close()

		targetPath, err := resolveSafe(h.Config.StorageDir, path)
		if err != nil {
			return c.Status(403).JSON(fiber.Map{"error": "invalid path"})
		}
		
		// Save file
		out, err := os.Create(targetPath)
		if err != nil {
			return c.Status(500).JSON(fiber.Map{"error": "failed to open file for writing"})
		}
		defer out.Close()

		if _, err := io.Copy(out, resp.Body); err != nil {
			return c.Status(500).JSON(fiber.Map{"error": "failed to write file"})
		}
		
		h.scheduleThumbnailUpdate(targetPath, path)
	}

	// Send successful response according to OnlyOffice API
	return c.JSON(fiber.Map{"error": 0})
}

var (
	saveDebounceMutex sync.Mutex
	saveTimers        = make(map[string]*time.Timer)
)

func (h *OnlyOfficeHandler) scheduleThumbnailUpdate(targetPath, relativePath string) {
	saveDebounceMutex.Lock()
	defer saveDebounceMutex.Unlock()

	if timer, exists := saveTimers[targetPath]; exists {
		timer.Stop()
	}

	saveTimers[targetPath] = time.AfterFunc(10*time.Second, func() {
		saveDebounceMutex.Lock()
		delete(saveTimers, targetPath)
		saveDebounceMutex.Unlock()

		checksum, err := generateChecksum(targetPath)
		if err != nil {
			return
		}
		info, err := os.Stat(targetPath)
		if err != nil {
			return
		}

		h.DB.Exec(`
			INSERT INTO files (path, name, size, mime_type, checksum) 
			VALUES (?, ?, ?, ?, ?) 
			ON CONFLICT(path) DO UPDATE SET 
				checksum=excluded.checksum, 
				size=excluded.size, 
				updated_at=CURRENT_TIMESTAMP`,
			filepath.ToSlash(relativePath), filepath.Base(relativePath), info.Size(), mime.TypeByExtension(filepath.Ext(relativePath)), checksum,
		)

		workers.Instance.Enqueue(workers.ThumbnailJob{
			FilePath: relativePath,
			Checksum: checksum,
			MimeType: mime.TypeByExtension(filepath.Ext(relativePath)),
		})
	})
}

// DownloadForEditor serves a file to the OnlyOffice Document Server.
// This is a public endpoint that validates the download token manually,
// bypassing the auth middleware (which can fail when requests are proxied
// through Next.js rewrites).
func (h *OnlyOfficeHandler) DownloadForEditor(c *fiber.Ctx) error {
	path := c.Query("path")
	token := c.Query("token")

	if path == "" {
		return c.Status(400).JSON(fiber.Map{"error": "path required"})
	}

	// Validate the token.
	// Allow both short-lived download tokens and long-lived edit tokens.
	err := middleware.ValidateEditToken(token, h.Config.JWTSecret, "", path)
	if err != nil {
		err = middleware.ValidateDownloadToken(token, h.Config.JWTSecret, "", path)
	}
	if err != nil {
		return c.Status(401).JSON(fiber.Map{"error": "unauthorized"})
	}

	// Jail the path to the storage directory
	fullPath, err := resolveSafe(h.Config.StorageDir, path)
	if err != nil {
		return c.Status(403).JSON(fiber.Map{"error": "invalid path"})
	}

	info, err := os.Stat(fullPath)
	if err != nil || info.IsDir() {
		return c.Status(404).JSON(fiber.Map{"error": "file not found"})
	}

	return c.SendFile(fullPath)
}

// CreateBlank creates an empty document for Docs or Slides mode
func (h *OnlyOfficeHandler) CreateBlank(c *fiber.Ctx) error {
	req := new(struct {
		Type string `json:"type"`
		Name string `json:"name"`
	})

	if err := c.BodyParser(req); err != nil {
		return c.Status(400).JSON(fiber.Map{"error": "invalid request"})
	}

	if req.Name == "" {
		req.Name = "Untitled Document"
		if req.Type == "slide" {
			req.Name = "Untitled Presentation"
		} else if req.Type == "cell" {
			req.Name = "Untitled Spreadsheet"
		}
	}

	ext := ".docx"
	if req.Type == "slide" {
		ext = ".pptx"
	} else if req.Type == "cell" {
		ext = ".xlsx"
	}
	
	// Add extension if missing
	if filepath.Ext(req.Name) != ext {
		req.Name += ext
	}

	// Create Documents directory if it doesn't exist
	docsDir := filepath.Join(h.Config.StorageDir, "Documents")
	os.MkdirAll(docsDir, 0755)

	// Make sure the file name doesn't collide
	basePath := filepath.Join(docsDir, req.Name)
	finalPath := basePath
	counter := 1
	for {
		if _, err := os.Stat(finalPath); os.IsNotExist(err) {
			break
		}
		finalPath = filepath.Join(docsDir, fmt.Sprintf("%s (%d)%s", req.Name[:len(req.Name)-len(ext)], counter, ext))
		counter++
	}

	// Create a valid Office Open XML file (docx/pptx are ZIP archives)
	if err := createBlankOfficeFile(finalPath, ext); err != nil {
		return c.Status(500).JSON(fiber.Map{"error": "failed to create file"})
	}

	// Return the relative path
	relativePath, _ := filepath.Rel(h.Config.StorageDir, finalPath)
	
	// Enqueue for thumbnail generation (with 10s debounce)
	h.scheduleThumbnailUpdate(finalPath, relativePath)
	
	return c.JSON(fiber.Map{
		"path": filepath.ToSlash(relativePath),
		"name": filepath.Base(finalPath),
	})
}

// POST /api/onlyoffice/template
func (h *OnlyOfficeHandler) CreateFromTemplate(c *fiber.Ctx) error {
	var req struct {
		TemplateName string `json:"template"` // e.g., "apa.docx"
	}
	if err := c.BodyParser(&req); err != nil {
		return c.Status(400).JSON(fiber.Map{"error": "invalid request"})
	}

	srcPath := filepath.Join("templates", req.TemplateName)
	if _, err := os.Stat(srcPath); os.IsNotExist(err) {
		return c.Status(404).JSON(fiber.Map{"error": "template not found"})
	}

	// Figure out a safe name in root directory
	baseName := "Untitled Document"
	ext := ".docx"
	if strings.HasSuffix(req.TemplateName, ".pptx") {
		baseName = "Untitled Presentation"
		ext = ".pptx"
	}
	if req.TemplateName == "apa.docx" {
		baseName = "APA Paper"
	} else if req.TemplateName == "resume.docx" {
		baseName = "Resume"
	}

	// Create Documents directory if it doesn't exist
	docsDir := filepath.Join(h.Config.StorageDir, "Documents")
	os.MkdirAll(docsDir, 0755)

	finalPath := filepath.Join(docsDir, baseName+ext)
	counter := 1
	for {
		if _, err := os.Stat(finalPath); os.IsNotExist(err) {
			break
		}
		finalPath = filepath.Join(docsDir, fmt.Sprintf("%s (%d)%s", baseName, counter, ext))
		counter++
	}

	// Copy the template file
	srcFile, err := os.Open(srcPath)
	if err != nil {
		return c.Status(500).JSON(fiber.Map{"error": "failed to open template"})
	}
	defer srcFile.Close()

	destFile, err := os.Create(finalPath)
	if err != nil {
		return c.Status(500).JSON(fiber.Map{"error": "failed to create destination file"})
	}
	defer destFile.Close()

	if _, err := io.Copy(destFile, srcFile); err != nil {
		return c.Status(500).JSON(fiber.Map{"error": "failed to copy template data"})
	}

	relativePath, _ := filepath.Rel(h.Config.StorageDir, finalPath)
	
	h.scheduleThumbnailUpdate(finalPath, relativePath)

	return c.JSON(fiber.Map{
		"path": filepath.ToSlash(relativePath),
		"name": filepath.Base(finalPath),
	})
}

// ListOfficeFiles returns all .docx, .pptx, or .xlsx files across the entire storage directory.
// GET /api/onlyoffice/files?type=docx|pptx|xlsx
func (h *OnlyOfficeHandler) ListOfficeFiles(c *fiber.Ctx) error {
	fileType := c.Query("type", "docx") // "docx", "pptx", or "xlsx"
	ext := ".docx"
	if fileType == "pptx" {
		ext = ".pptx"
	} else if fileType == "xlsx" {
		ext = ".xlsx"
	}

	type OfficeFile struct {
		Name     string `json:"name"`
		Path     string `json:"path"`
		Size     int64  `json:"size"`
		ModTime  string `json:"mod_time"`
		Checksum string `json:"checksum,omitempty"`
	}

	var results []OfficeFile

	checksums := make(map[string]string)
	dbPaths := []string{}
	rows, err := h.DB.Query("SELECT path, checksum FROM files WHERE checksum IS NOT NULL AND checksum != ''")
	if err == nil {
		defer rows.Close()
		for rows.Next() {
			var p, c string
			if rows.Scan(&p, &c) == nil {
				checksums[p] = c
				dbPaths = append(dbPaths, p)
			}
		}
	}
	
	walkPaths := []string{}

	filepath.Walk(h.Config.StorageDir, func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return nil
		}

		if info.IsDir() {
			base := filepath.Base(path)
			if strings.HasPrefix(base, ".") && path != h.Config.StorageDir {
				return filepath.SkipDir
			}
			return nil
		}

		if strings.HasSuffix(strings.ToLower(info.Name()), ext) {
			relPath, _ := filepath.Rel(h.Config.StorageDir, path)
			relPathSlash := filepath.ToSlash(relPath)
			
			chk := checksums[relPathSlash]
			walkPaths = append(walkPaths, relPathSlash)
			
			results = append(results, OfficeFile{
				Name:     info.Name(),
				Path:     relPathSlash,
				Size:     info.Size(),
				ModTime:  info.ModTime().UTC().Format("2006-01-02T15:04:05Z"),
				Checksum: chk,
			})
		}
		return nil
	})

	if results == nil {
		results = []OfficeFile{}
	}

	return c.JSON(fiber.Map{
		"files": results,
		"count": len(results),
		"debug_db": dbPaths,
		"debug_walk": walkPaths,
	})
}

// createBlankOfficeFile creates a minimal valid .docx or .pptx file.
// These formats are ZIP archives containing XML files following the
// Office Open XML (OOXML) standard.
func createBlankOfficeFile(path string, ext string) error {
	f, err := os.Create(path)
	if err != nil {
		return err
	}
	defer f.Close()

	w := zip.NewWriter(f)
	defer w.Close()

	if ext == ".pptx" {
		return writePptxContents(w)
	} else if ext == ".xlsx" {
		return writeXlsxContents(w)
	}
	return writeDocxContents(w)
}

func writeDocxContents(w *zip.Writer) error {
	files := map[string]string{
		"[Content_Types].xml": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<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"/>
  <Override PartName="/word/document.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml"/>
</Types>`,
		"_rels/.rels": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="word/document.xml"/>
</Relationships>`,
		"word/document.xml": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<w:document xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main">
  <w:body>
    <w:p><w:r><w:t></w:t></w:r></w:p>
  </w:body>
</w:document>`,
	}
	for name, content := range files {
		fw, err := w.Create(name)
		if err != nil {
			return err
		}
		if _, err := fw.Write([]byte(content)); err != nil {
			return err
		}
	}
	return nil
}

func writePptxContents(w *zip.Writer) error {
	files := map[string]string{
		"[Content_Types].xml": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<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"/>
  <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/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"/>
</Types>`,
		"_rels/.rels": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="ppt/presentation.xml"/>
</Relationships>`,
		"ppt/presentation.xml": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<p:presentation xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main"
  xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"
  xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main">
  <p:sldMasterIdLst><p:sldMasterId id="2147483648" r:id="rId1"/></p:sldMasterIdLst>
  <p:sldIdLst><p:sldId id="256" r:id="rId2"/></p:sldIdLst>
  <p:sldSz cx="12192000" cy="6858000"/>
  <p:notesSz cx="6858000" cy="9144000"/>
</p:presentation>`,
		"ppt/_rels/presentation.xml.rels": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<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/theme" Target="theme/theme1.xml"/>
</Relationships>`,
		"ppt/theme/theme1.xml": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<a:theme xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" name="Office Theme">
  <a:themeElements>
    <a:clrScheme name="Office">
      <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="44546A"/></a:dk2>
      <a:lt2><a:srgbClr val="E7E6E6"/></a:lt2>
      <a:accent1><a:srgbClr val="4472C4"/></a:accent1>
      <a:accent2><a:srgbClr val="ED7D31"/></a:accent2>
      <a:accent3><a:srgbClr val="A5A5A5"/></a:accent3>
      <a:accent4><a:srgbClr val="FFC000"/></a:accent4>
      <a:accent5><a:srgbClr val="5B9BD5"/></a:accent5>
      <a:accent6><a:srgbClr val="70AD47"/></a:accent6>
      <a:hlink><a:srgbClr val="0563C1"/></a:hlink>
      <a:folHlink><a:srgbClr val="954F72"/></a:folHlink>
    </a:clrScheme>
    <a:fontScheme name="Office">
      <a:majorFont><a:latin typeface="Calibri Light"/><a:ea typeface=""/><a:cs typeface=""/></a:majorFont>
      <a:minorFont><a:latin typeface="Calibri"/><a:ea typeface=""/><a:cs typeface=""/></a:minorFont>
    </a:fontScheme>
    <a:fmtScheme name="Office">
      <a:fillStyleLst>
        <a:solidFill><a:schemeClr val="phClr"/></a:solidFill>
        <a:solidFill><a:schemeClr val="phClr"/></a:solidFill>
        <a:solidFill><a:schemeClr val="phClr"/></a:solidFill>
      </a:fillStyleLst>
      <a:lnStyleLst>
        <a:ln w="6350" cap="flat" cmpd="sng" algn="ctr"><a:solidFill><a:schemeClr val="phClr"/></a:solidFill></a:ln>
        <a:ln w="12700" cap="flat" cmpd="sng" algn="ctr"><a:solidFill><a:schemeClr val="phClr"/></a:solidFill></a:ln>
        <a:ln w="19050" cap="flat" cmpd="sng" algn="ctr"><a:solidFill><a:schemeClr val="phClr"/></a:solidFill></a:ln>
      </a:lnStyleLst>
      <a:effectStyleLst>
        <a:effectStyle><a:effectLst/></a:effectStyle>
        <a:effectStyle><a:effectLst/></a:effectStyle>
        <a:effectStyle><a:effectLst/></a:effectStyle>
      </a:effectStyleLst>
      <a:bgFillStyleLst>
        <a:solidFill><a:schemeClr val="phClr"/></a:solidFill>
        <a:solidFill><a:schemeClr val="phClr"/></a:solidFill>
        <a:solidFill><a:schemeClr val="phClr"/></a:solidFill>
      </a:bgFillStyleLst>
    </a:fmtScheme>
  </a:themeElements>
</a:theme>`,
		"ppt/slideMasters/slideMaster1.xml": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<p:sldMaster xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main"
  xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"
  xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main">
  <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 bg1="lt1" tx1="dk1" bg2="lt2" tx2="dk2" accent1="accent1" accent2="accent2" accent3="accent3" accent4="accent4" accent5="accent5" accent6="accent6" hlink="hlink" folHlink="folHlink"/>
  <p:sldLayoutIdLst><p:sldLayoutId id="2147483649" r:id="rId1"/></p:sldLayoutIdLst>
</p:sldMaster>`,
		"ppt/slideMasters/_rels/slideMaster1.xml.rels": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<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/slideLayouts/slideLayout1.xml": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<p:sldLayout xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main"
  xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"
  xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" type="blank">
  <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:sldLayout>`,
		"ppt/slideLayouts/_rels/slideLayout1.xml.rels": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<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/slides/slide1.xml": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<p:sld xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main"
  xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"
  xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main">
  <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:sld>`,
		"ppt/slides/_rels/slide1.xml.rels": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<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>`,
	}
	for name, content := range files {
		fw, err := w.Create(name)
		if err != nil {
			return err
		}
		if _, err := fw.Write([]byte(content)); err != nil {
			return err
		}
	}
	return nil
}

func writeXlsxContents(w *zip.Writer) error {
	files := map[string]string{
		"[Content_Types].xml": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<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"/>
  <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"/>
</Types>`,
		"_rels/.rels": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="xl/workbook.xml"/>
</Relationships>`,
		"xl/workbook.xml": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships">
  <sheets>
    <sheet name="Sheet1" sheetId="1" r:id="rId1"/>
  </sheets>
</workbook>`,
		"xl/_rels/workbook.xml.rels": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<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"/>
</Relationships>`,
		"xl/worksheets/sheet1.xml": `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">
  <sheetData/>
</worksheet>`,
	}
	for name, content := range files {
		fw, err := w.Create(name)
		if err != nil {
			return err
		}
		if _, err := fw.Write([]byte(content)); err != nil {
			return err
		}
	}
	return nil
}

// SignConfig takes the OnlyOffice configuration payload and signs it with the JWT secret
func (h *OnlyOfficeHandler) SignConfig(c *fiber.Ctx) error {
	if h.Config.OnlyOfficeJWT == "" {
		return c.Status(500).JSON(fiber.Map{"error": "JWT secret is not configured on the server"})
	}

	var payload map[string]interface{}
	if err := c.BodyParser(&payload); err != nil {
		return c.Status(400).JSON(fiber.Map{"error": "invalid json payload"})
	}

	// Create a new JWT token using the HS256 algorithm
	token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims(payload))

	// Sign the token with our secret
	signedToken, err := token.SignedString([]byte(h.Config.OnlyOfficeJWT))
	if err != nil {
		return c.Status(500).JSON(fiber.Map{"error": "failed to sign token"})
	}

	return c.JSON(fiber.Map{
		"token": signedToken,
	})
}