#!/bin/bash

usage() {
    >&2 echo -e "VLESS-TCP-TLS proxy builder"
    >&2 echo -e "Usage: proxy-ltt <id@domain.com:443>[,xtls][,fingerprint=safari]"
}

if [ -z "$1" ]; then
    >&2 echo -e "Missing command options.\n"
    usage; exit 1
fi

# id@domain.com:443,fingerprint=safari
args=(`echo $1 |tr ',' ' '`)
dest="${args[0]}"
for ext_opt in "${args[@]}"
do
    kv=(`echo $ext_opt |tr '=' ' '`)
    case "${kv[0]}" in
        a|alpn)
            ALPN+=("${kv[1]}")
            ;;
        s|serverName)
            serverName="${kv[1]}"
            ;;
        f|fingerprint)
            fingerprint="${kv[1]}"
            ;;
        xtls)
            flow="xtls-rprx-vision"
            ;;
    esac
done
options=(`echo $dest |tr '@' ' '`)
id="${options[0]}"
options=(`echo ${options[1]} |tr ':' ' '`)
host="${options[0]}"
port="${options[1]}"

if [ -z "${fingerprint}" ]; then fingerprint="safari"; fi

if [ -z "${id}" ]; then >&2 echo -e "Error: id undefined.\n"; usage; exit 1; fi

if [ -z "${host}" ]; then >&2 echo -e "Error: destination host undefined.\n"; usage; exit 1; fi

if [ -z "${port}" ]; then port=443; fi

if ! [ "${port}" -eq "${port}" ] 2>/dev/null; then >&2 echo -e "Port number must be numeric.\n"; exit 1; fi

# User settings
Jusers=`jq -nc --arg uuid "${id}" --arg flow "${flow}" '. += {"flow":$flow,"id":$uuid,"encryption":"none","level":0}'`

# Vnext settings
Jvnext=`jq -nc --arg host "${host}" --arg port "${port}" --argjson juser "${Jusers}" \
'. += {"address":$host,"port":($port|tonumber),"users":[$juser]}' `

# Stream Settings
Jalpn=`printf '%s\n' "${ALPN[@]}"|jq -R|jq -sc`
JstreamSettings=`jq -nc --arg serverName "${serverName}" --arg fingerprint "${fingerprint}" --argjson Jalpn "${Jalpn}" \
'. += {"network":"tcp","security":"tls","tlsSettings":{"serverName":$serverName,"fingerprint":$fingerprint,"alpn":$Jalpn}}' `

Jproxy=`jq -nc --arg host "${host}" --argjson jvnext "${Jvnext}" --argjson jstreamSettings "${JstreamSettings}" \
'. += { "tag":"proxy","protocol":"vless","settings":{"vnext":[$jvnext]},"streamSettings":$jstreamSettings}' `

echo "$Jproxy"
exit 0