package docker

import (
	b64 "encoding/base64"
	"fmt"
	"ledo/app/modules/aws_ledo"
	"ledo/app/modules/context"
	"net/url"
	"os"
)

func trimLeftChars(s string, n int) string {
    m := 0
    for i := range s {
        if m >= n {
            return s[i:]
        }
        m++
    }
    return s[:0]
}

func DockerEcrLogin(ctx *context.LedoContext) error {
	ecr, err := aws_ledo.EcrLogin()
	if err != nil {
		fmt.Println("Ecr login error: %s", err)
		os.Exit(1)
	}
	password := *ecr.AuthorizationData[0].AuthorizationToken
	ecrUrl := *ecr.AuthorizationData[0].ProxyEndpoint
	sDec, _ := b64.StdEncoding.DecodeString(password)
	registryAddr, err := url.Parse(ecrUrl)
	if err != nil {
		fmt.Printf("Ecr endpoint addr parse error: %s", err)
		os.Exit(1)
	}
	ctx.ExecCmdSilent("docker", []string{"login", "-u", "AWS", "-p", string(trimLeftChars(string(sDec), 4)), registryAddr.Host})

	return nil
}