package backup

import (
    "crypto/tls"
    "fmt"
    "log"
    "net/http"
    "golang.org/x/crypto/acme/autocert"
)

// GenerateCertForDomain generates an SSL certificate for a domain using Let's Encrypt
func GenerateCertForDomain(domain string) {
    certManager := autocert.Manager{
        Prompt:     autocert.AcceptTOS,
        Cache:      autocert.DirCache("certs"), // Stores certificates in ./certs
        HostPolicy: autocert.HostWhitelist(domain), // Replace with your domain
    }

    server := &http.Server{
        Addr: ":https", // Default HTTPS port
        TLSConfig: &tls.Config{
            GetCertificate: certManager.GetCertificate,
        },
    }

    // Redirect HTTP to HTTPS
    go http.ListenAndServe(":http", certManager.HTTPHandler(nil))

    log.Printf("Starting HTTPS server for %s\n", domain)
    log.Fatal(server.ListenAndServeTLS("", "")) // Keys are provided by Let's Encrypt
}

// HandleJoinRequest handles a join request from a node
func HandleJoinRequest(w http.ResponseWriter, r *http.Request) {
    // TODO: Implement join request logic here
    fmt.Fprintf(w, "Join request received\n")
}

// SendCommandToNode sends a CLI command to a specified node in the cluster
func SendCommandToNode(nodeAddress, command string) {
    // TODO: Implement command sending logic here
    fmt.Printf("Sending command '%s' to node %s\n", command, nodeAddress)
}

// StartMasterServer starts the master API server that listens for join requests and other commands
func StartMasterServer(domain string) {
    http.HandleFunc("/join", HandleJoinRequest) // Endpoint for nodes to join the cluster

    // Generate SSL certificate and start HTTPS server
    GenerateCertForDomain(domain)
}