package pdf

import (
	"encoding/base64"
	"github.com/SebastiaanKlippert/go-wkhtmltopdf"
	"strings"
)

// html转 Pdf dataType = 1 为网页url dataType = 2为网页内容 outFile为空则不保存
func HtmlToPdfBase64(content string, dataType int, outFile ...string) (string, error) {
	pdfg, err := wkhtmltopdf.NewPDFGenerator()
	if err != nil {
		return "", err
	}
	switch dataType {
	case 1: //网页地址
		pdfg.AddPage(wkhtmltopdf.NewPage(content))
	case 2: //网页内容
		pdfg.AddPage(wkhtmltopdf.NewPageReader(strings.NewReader(content)))
	}
	//模式
	pdfg.Orientation.Set(wkhtmltopdf.OrientationPortrait)
	//pdf尺寸默认A4纸
	pdfg.PageSize.Set(wkhtmltopdf.PageSizeA4)
	// Create PDF document in memory
	if err = pdfg.Create(); err != nil {
		return "", err
	}
	// Write PDF to file
	if len(outFile) != 0 {
		if err = pdfg.WriteFile(outFile[0]); err != nil {
			return "", err
		}
	}
	return base64.StdEncoding.EncodeToString(pdfg.Bytes()), nil
}