#!/usr/bin/env bash
# Build the games binary, bundle it with deploy files into a tarball,
# base64-encode it, and split into 25MB chunks for transfer.
set -euo pipefail

REPO_DIR="$(cd "$(dirname "$0")/.." && pwd)"
cd "$REPO_DIR"

TIMESTAMP=$(date +%Y%m%d-%H%M%S)
TARBALL="games-deploy-${TIMESTAMP}.tar.gz"
BASE64_FILE="games-deploy-${TIMESTAMP}_b64.txt"

#==============================================================================
# Clean previous artifacts
#==============================================================================
echo "--- Cleaning old artifacts ---"
rm -f ./games games-deploy-*.tar.gz games-deploy-*_b64*.txt

#==============================================================================
# Build
#==============================================================================
echo "--- Building CSS ---"
go tool gotailwind -i assets/css/input.css -o assets/css/output.css --minify

echo "--- Building binary (linux/amd64) ---"
CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o games .

#==============================================================================
# Verify required files
#==============================================================================
echo "--- Verifying files ---"
REQUIRED_FILES=(
  games
  deploy/setup.sh
  deploy/deploy.sh
  deploy/reassemble.sh
  deploy/games.service
)
for f in "${REQUIRED_FILES[@]}"; do
  if [[ ! -f "$f" ]]; then
    echo "ERROR: Missing required file: $f" >&2
    exit 1
  fi
  echo "  OK $f"
done

#==============================================================================
# Create tarball
#==============================================================================
echo "--- Creating tarball ---"
tar -czf "/tmp/${TARBALL}" --transform 's,^,games/,' \
  games \
  deploy/setup.sh \
  deploy/deploy.sh \
  deploy/reassemble.sh \
  deploy/games.service

mv "/tmp/${TARBALL}" .
echo "  -> ${TARBALL} ($(du -h "${TARBALL}" | cut -f1))"

#==============================================================================
# Base64 encode and split
#==============================================================================
echo "--- Base64 encoding ---"
base64 "${TARBALL}" > "${BASE64_FILE}"
echo "  -> ${BASE64_FILE} ($(du -h "${BASE64_FILE}" | cut -f1))"

echo "--- Splitting into 25MB chunks ---"
split -b 25M -d --additional-suffix=.txt "${BASE64_FILE}" "games-deploy-${TIMESTAMP}_b64_part"
rm -f "${BASE64_FILE}"

CHUNKS=(games-deploy-${TIMESTAMP}_b64_part*.txt)
echo "  -> ${#CHUNKS[@]} chunk(s):"
for chunk in "${CHUNKS[@]}"; do
  echo "     $chunk ($(du -h "$chunk" | cut -f1))"
done

#==============================================================================
# Done
#==============================================================================
echo ""
echo "=== Package Complete ==="
echo ""
echo "Transfer the chunk files to the target server, then run:"
echo "  ./reassemble.sh"
echo "  cd ~/games && sudo ./deploy/setup.sh   # first time only"
echo "  cd ~/games && sudo ./deploy/deploy.sh"