#!/bin/bash
# prepare_offline_bundle.sh - Создание офлайн-пакета (с подключённым VPN)
# Запустите с VPN: proxychains ./prepare_offline_bundle.sh
# Получите bundle.tar.gz для переноса на компьютер без доступа к GitHub

set -e
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
BUNDLE_DIR="/tmp/zapret-bundle-$$"
BUNDLE_FILE="$SCRIPT_DIR/zapret-discord-youtube-linux-bundle.tar.gz"

echo "================================================"
echo "  Offline Bundle Preparation"
echo "  Run this WITH VPN/proxy enabled"
echo "================================================"
echo ""

# Check for GitHub access
echo "[*] Testing GitHub connectivity..."
if ! curl -sfL --max-time 10 "https://github.com" >/dev/null 2>&1; then
    echo "[WARN] GitHub not reachable."
    echo "    Proxychains or VPN needed!"
    echo ""
    echo "Examples:"
    echo "    proxychains ./prepare_offline_bundle.sh"
    echo "    HTTPS_PROXY=socks5://localhost:1080 ./prepare_offline_bundle.sh"
    read -rp "Continue anyway? [y/N]: " ans
    [[ "$ans" == [yY]* ]] || exit 1
fi

mkdir -p "$BUNDLE_DIR/sources"
mkdir -p "$BUNDLE_DIR/upstream"

# Step 1: Download zapret source
echo ""
echo "[*] Step 1/3: Downloading bol-van/zapret..."
if command -v git >/dev/null 2>&1; then
    git clone --depth=1 https://github.com/bol-van/zapret.git "$BUNDLE_DIR/sources/zapret"
else
    echo "  git not found. Using HTTPS:"
    curl -sfL -o "/tmp/zapret.tar.gz" "https://api.github.com/repos/bol-van/zapret/tarball/master" 2>/dev/null || {
        echo "[FAIL] Could not download zapret. Try with proxychains."
        exit 1
    }
    mkdir -p "$BUNDLE_DIR/sources/zapret"
    tar -xzf "/tmp/zapret.tar.gz" -C "$BUNDLE_DIR/sources/zapret" --strip-components=1
    rm -f "/tmp/zapret.tar.gz"
fi
echo "  [OK] zapret source downloaded"

# Step 2: Download upstream Flowseal lists
echo ""
echo "[*] Step 2/3: Downloading upstream lists/strategies..."
UPSTREAM_TMP="/tmp/upstream-$$"
if command -v git >/dev/null 2>&1; then
    git clone --depth=1 https://github.com/Flowseal/zapret-discord-youtube.git "$UPSTREAM_TMP"
else
    (cd "$BUNDLE_DIR" && curl -sfL -o "zapret-win.tar.gz" "https://api.github.com/repos/Flowseal/zapret-discord-youtube/tarball/main" && \
     mkdir -p "$UPSTREAM_TMP" && tar -xzf zapret-win.tar.gz -C "$UPSTREAM_TMP" --strip-components=1)
fi

# Copy needed files
cp "$UPSTREAM_TMP/.service/hosts" "$BUNDLE_DIR/hosts" 2>/dev/null || true
cp "$UPSTREAM_TMP/.service/version.txt" "$BUNDLE_DIR/version.txt" 2>/dev/null || true
cp "$UPSTREAM_TMP/lists/"*.txt "$BUNDLE_DIR/" 2>/dev/null || true
cp "$UPSTREAM_TMP/general"*.bat "$BUNDLE_DIR/" 2>/dev/null || true

echo "  [OK] Upstream content downloaded: lists, bat files, hosts, version"

# Step 3: Download fake .bin files
echo ""
echo "[*] Step 3/3: Downloading fake packet binaries..."
FAKE_URL="https://github.com/bol-van/zapret/raw/master/files/fake"
for f in quic_initial_www_google_com.bin quic_initial_dbankcloud_ru.bin tls_clienthello_www_google_com.bin tls_clienthello_4pda_to.bin tls_clienthello_max_ru.bin stun.bin; do
    if curl -sfL "$FAKE_URL/$f" -o "$BUNDLE_DIR/$f" 2>/dev/null; then
        echo "  [OK] $f"
    else
        echo "  [SKIP] $f (will build at install time)"
    fi
done

# Package everything
echo ""
echo "[*] Packaging..."
mkdir -p "$BUNDLE_DIR/installed-scripts"
cp "$SCRIPT_DIR"/*.sh "$BUNDLE_DIR/installed-scripts/" 2>/dev/null || true
cp "$SCRIPT_DIR/lib/"*.sh "$BUNDLE_DIR/installed-scripts/lib/" 2>/dev/null || true
cp "$SCRIPT_DIR/strategies/"*.conf "$BUNDLE_DIR/installed-scripts/strategies/" 2>/dev/null || true
cp "$SCRIPT_DIR/systemd/"*.service "$BUNDLE_DIR/installed-scripts/systemd/" 2>/dev/null || true
cp "$SCRIPT_DIR/systemd/"*.timer "$BUNDLE_DIR/installed-scripts/systemd/" 2>/dev/null || true

tar -czf "$BUNDLE_FILE" -C "/tmp" "$(basename "$BUNDLE_DIR")"
rm -rf "$BUNDLE_DIR" "$UPSTREAM_TMP"

echo ""
echo "================================================"
echo "  BUNDLE READY"
echo "  File: $BUNDLE_FILE"
echo "================================================"
echo ""
echo "To install on target machine without internet:"
echo "  cd /opt"
echo "  tar -xzf zapret-discord-youtube-linux-bundle.tar.gz"
echo "  cd zapret-bundle-*/installed-scripts"
echo "  sudo ./install.sh --offline"
echo ""
echo "Or if you have proxy on target:"
echo "  export HTTP_PROXY=http://proxy:port"
echo "  sudo ./install.sh"
echo ""