func addHeader(pdf *gofpdf.Fpdf, text string, size int) {
	if pdf == nil {
		return
	}
	pdf.SetFillColor(255, 255, 255)
	pdf.SetTextColor(0, 0, 0)
	pdf.SetFont("Arial", "", (float64)(size))
	pdf.CellFormat((float64)(len(text)*5), (float64)(size/2), text, "0", 0, "L", true, 0, "")
	pdf.Ln(-1)
}

func docWriter(pdf *gofpdf.Fpdf, idx int) *pdfWriter {
	pw := new(pdfWriter)
	pw.pdf = pdf
	pw.idx = idx
	if pdf.Ok() {
		var err error
		fileStr := fmt.Sprintf("%s/pdf/tutorial%02d.pdf", cnGofpdfDir, idx)
		pw.fl, err = os.Create(fileStr)
		if err != nil {
			pdf.SetErrorf("Error opening output file %s", fileStr)
		}
	}
	return pw
}

func tutorialSummary(f *gofpdf.Fpdf, fileStr string) {
	if f.Ok() {
		fl, err := os.Create(fileStr)
		defer fl.Close()
		if err == nil {
			f.Output(fl)
		} else {
			f.SetError(err)
		}
	}
	if f.Ok() {
		fmt.Printf("Successfully generated %s\n", fileStr)
	} else {
		errPrintf("%s\n", f.Error())
	}
}

func createTable(pdf *gofpdf.Fpdf, header []string, data [][]string, columnSize []float64) {
	if pdf == nil {
		return
	}
	fmt.Println(header)
	fmt.Println("---")
	fmt.Println(data)
	fmt.Println("---")
	fmt.Println(columnSize)
	fmt.Println("---")

	cLen := len(columnSize)
	if cLen == 0 {
		return
	}
	fmt.Println("cLen > 0")
	if len(header) != 0 && cLen != len(header) {
		return
	}
	fmt.Println("len header 0 or eq to cLen")
	for _, v := range data {
		if len(v) != cLen {
			return
		}
	}
	fmt.Println("Check done")
	pdf.SetFillColor(128, 128, 128)
	pdf.SetTextColor(255, 255, 255)
	pdf.SetDrawColor(128, 0, 0)
	pdf.SetLineWidth(.3)
	pdf.SetFont("Arial", "", 12)
	// display header fields
	for i, str := range header {
		pdf.CellFormat(columnSize[i], 7, str, "1", 0, "C", true, 0, "")
	}
	// only advance a line if we wrote a header
	if len(header) > 0 {
		pdf.Ln(-1)
	}
	// display data /w alternating background
	pdf.SetFillColor(224, 235, 255)
	pdf.SetTextColor(0, 0, 0)
	pdf.SetFont("", "", 0)
	//  Data
	fill := false
	for _, c := range data {
		for i, str := range c {
			pdf.CellFormat(columnSize[i], 6, str, "LR", 0, "", fill, 0, "")
		}
		pdf.Ln(-1)
		fill = !fill
	}
}

// SaveToPdfFile creates and saves a pdf document to a file
func SaveToPdfFile(filePath string, pdf *gofpdf.Fpdf) error {
	return pdf.OutputFileAndClose(filePath)
}

func smiley(pdf *gofpdf.Fpdf, x, y float64) {
	pdf.Circle(0.75+x+0.5, 1+y, 0.4, "D")
	pdf.Circle(1.1+x, 0.8+y, 0.05, "DF")
	pdf.Circle(1.4+x, 0.8+y, 0.05, "DF")
	pdf.Arc(0.75+x+0.5, 1.1+y, 0.2, 0.2, 180, 90, 270, "FD")
}

func addSpaces(pdf *gofpdf.Fpdf, spaces ...Space) {
	for _, space := range spaces {
		pdf.SetFillColor(space.Color.R, space.Color.G, space.Color.B)
		pdf.Rect(space.X+0.75, space.Y+0.5, 1, 1, "FD")
	}
}

func poly(pdf *gofpdf.Fpdf, style string, points ...gofpdf.PointType) {
	pdf.Polygon(points, style)
}

func docWriter(pdf *gofpdf.Fpdf, idx int) *pdfWriter {
	pw := new(pdfWriter)
	pw.pdf = pdf
	pw.idx = idx
	if pdf.Ok() {
		var err error
		fileStr := fmt.Sprintf("%s\\test_pdf_%02d.pdf", cnGofpdfDir, idx)
		pw.fl, err = os.Create(fileStr)
		if err != nil {
			pdf.SetErrorf("Error opening output file %s", fileStr)
		}
	}
	fileLock1 := Locker{false, "lock#1"}
	printIsLocked(fileLock1)
	fileLock1.locked = true
	printIsLocked(fileLock1)

	fileLock2 := Locker{true, "lock#2"}
	printIsLocked(fileLock2)

	return pw
}