package verify

import (
	"bytes"
	"encoding/base64"
	"html/template"
	"image/png"
	"net/http"

	"github.com/boombuler/barcode"
	"github.com/boombuler/barcode/code128"
	"github.com/boombuler/barcode/qr"
	"github.com/gin-gonic/gin"

	"edge-infra.dev/pkg/edge/iam/log"
	"edge-infra.dev/pkg/edge/iam/verify/templates"
)

func (v *Verifier) viewBarcode(ctx *gin.Context) {
	log := log.Get(ctx.Request.Context())
	// Access the form data
	barcodeValue := ctx.Query("barcode")
	if barcodeValue == "" {
		log.Info("No barcode value found")
		ctx.AbortWithStatus(http.StatusBadRequest)
		return
	}

	result := &BarcodeScanner{}

	result.Token = barcodeValue
	var bc barcode.Barcode
	// generate image for the code128 barcode
	if len(barcodeValue) == GetBarcodeLength() {
		bc, _ = code128.EncodeWithoutChecksum(barcodeValue)
		bc, _ = barcode.Scale(bc, 700, 150)
	} else {
		bc, _ = qr.Encode(barcodeValue, qr.L, qr.Auto)
		bc, _ = barcode.Scale(bc, 256, 256)
	}
	var buf bytes.Buffer
	_ = png.Encode(&buf, bc)
	result.Image = base64.StdEncoding.EncodeToString(buf.Bytes())

	result.ScanBarcodeURI = v.ClientURL + "/verify/scan-barcode?barcode="

	t, err := template.New("").Parse(templates.BarcodeScanner)
	tpl := template.Must(t, err)
	var w bytes.Buffer
	_ = tpl.Execute(&w, result)

	// Write the HTML to the response
	ctx.Data(http.StatusOK, gin.MIMEHTML, w.Bytes())
}