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package acme

import (
	"io"
	"net/http"
	"path"
)

// WellKnown URL path
const WellKnown = `/.well-known/acme-challenge/`

// Solver decribes a solving interface
type Solver interface {
	Solve(token, keyAuth string) error
}

type httpSolver struct {
	http.Server
}

func NewHTTPSolver(addr string) Solver {
	var s httpSolver
	s.Server = http.Server{Addr: addr}
	go s.ListenAndServe()
	return &s
}

func (s httpSolver) Solve(token, keyAuth string) error {
	p := path.Join(WellKnown, token)
	http.HandleFunc(p, func(w http.ResponseWriter, r *http.Request) {
		io.WriteString(w, keyAuth)
	})
	return nil
}

type webRootSolver struct {
	webroot string
}

func NewWebRootSolver(webroot string) Solver {
	return &webRootSolver{webroot}
}

func (s webRootSolver) Solve(token, keyAuth string) error {
	p := path.Join(s.webroot, WellKnown, token)
	fd, err := CreatePubFile(p)
	if err != nil {
		return err
	}
	defer fd.Close()
	_, err = io.WriteString(fd, keyAuth)
	return err
}

type tlsSolver struct {
	http.Server
}

func (s tlsSolver) Solve(token, keyAuth string) error {
	return nil
}