#!/usr/bin/env bash
set -euo pipefail

INSTALL_DIR="${VPN_PROXY_INSTALL_DIR:-$HOME/.vpn-proxy-client}"
REPO_URL="${VPN_PROXY_REPO_URL:-https://git.dokops.ru/dokril/vpn-proxy.git}"
BRANCH="${VPN_PROXY_BRANCH:-master}"
COMPOSE_FILE="docker-compose.client.yml"

log() {
  printf '[vpn-proxy-client] %s\n' "$*"
}

die() {
  printf '[vpn-proxy-client] error: %s\n' "$*" >&2
  exit 1
}

need() {
  command -v "$1" >/dev/null 2>&1 || die "$1 is required"
}

if [[ "$(uname -s)" != "Darwin" ]]; then
  die "this installer is intended for macOS"
fi

need git
need docker

docker compose version >/dev/null 2>&1 || die "Docker Compose plugin is required"
docker info >/dev/null 2>&1 || die "Docker Desktop is not running"

if [[ -d "$INSTALL_DIR/.git" ]]; then
  log "updating $INSTALL_DIR"
  git -C "$INSTALL_DIR" fetch origin "$BRANCH"
  git -C "$INSTALL_DIR" checkout "$BRANCH"
  git -C "$INSTALL_DIR" pull --ff-only origin "$BRANCH"
else
  log "cloning $REPO_URL#$BRANCH to $INSTALL_DIR"
  mkdir -p "$(dirname "$INSTALL_DIR")"
  git clone --branch "$BRANCH" "$REPO_URL" "$INSTALL_DIR"
fi

cd "$INSTALL_DIR"

if [[ ! -f .env && -f .env.example ]]; then
  cp .env.example .env
fi

log "building and starting Docker client"
docker compose -f "$COMPOSE_FILE" up -d --build

cat <<'EOF'

VPN Proxy Client is running.

UI:
  http://127.0.0.1:3456

Proxy:
  HTTP/SOCKS5 127.0.0.1:8080

Useful commands:
  cd ~/.vpn-proxy-client
  docker compose -f docker-compose.client.yml logs -f
  docker compose -f docker-compose.client.yml restart
  docker compose -f docker-compose.client.yml down

Optional macOS system proxy example:
  networksetup -setwebproxy Wi-Fi 127.0.0.1 8080
  networksetup -setsecurewebproxy Wi-Fi 127.0.0.1 8080
  networksetup -setsocksfirewallproxy Wi-Fi 127.0.0.1 8080

Disable later:
  networksetup -setwebproxystate Wi-Fi off
  networksetup -setsecurewebproxystate Wi-Fi off
  networksetup -setsocksfirewallproxystate Wi-Fi off

EOF