package main

import (
	"crypto/x509"
	"fmt"
	"io/ioutil"
	"net/url"
	"strings"
)

func (cp *CertPool) Decode(value string) error {
	*cp = CertPool{x509.NewCertPool()}
	caPEM, err := ioutil.ReadFile(value)
	if err != nil {
		return fmt.Errorf("unable to open CA file: %w", err)
	}
	ok := cp.AppendCertsFromPEM(caPEM)
	if !ok {
		return fmt.Errorf("unable to parse CA")
	}
	return nil
}

func (cl *CertList) Decode(value string) error {
	crlData, err := ioutil.ReadFile(value)
	if err != nil {
		return fmt.Errorf("unable to open CRL file: %w", err)
	}
	crl, err := x509.ParseCRL(crlData)
	if err != nil {
		return fmt.Errorf("unable to parse CRL file: %w", err)
	}
	*cl = CertList{crl}
	return nil
}

func (t *Targets) Decode(value string) error {
	splitted := strings.Split(value, ",")
	*t = Targets{
		targets: make([]*url.URL, len(splitted)),
	}
	for i, urlString := range splitted {
		u, err := url.Parse(urlString)
		if err != nil {
			return err
		}
		t.targets[i] = u
	}
	return nil
}