package admin

import (
	"fmt"
	"math/rand"
	"os"
	"time"
)

type (
    Session struct {
        UserID string
        Token string
        Expires int64
    }
)

const TOKEN_LENGTH = 64
const TOKEN_CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"

var ADMIN_ID_DISCORD = func() string {
    envvar := os.Getenv("DISCORD_ADMIN_ID")
    if envvar == "" {
        fmt.Printf("DISCORD_ADMIN_ID was not provided. Admin login will be unavailable.\n")
    }
    return envvar
}()

var sessions []*Session

func createSession(UserID string) Session {
    return Session{
        UserID: UserID,
        Token: string(generateToken()),
        Expires: time.Now().Add(24 * time.Hour).Unix(),
    }
}

func generateToken() string {
    var token []byte

    for i := 0; i < TOKEN_LENGTH; i++ {
        token = append(token, TOKEN_CHARS[rand.Intn(len(TOKEN_CHARS))])
    }

    return string(token)
}