#!/usr/bin/env bash
# build-installer.sh
# Builds livetrace-3.3.2-setup.exe on Linux — natively or via Docker.
#
# Usage:
#   ./installer/build-installer.sh           # requires: apt install nsis
#   ./installer/build-installer.sh --docker  # requires: docker

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
VERSION="3.3.2"
OUTPUT="livetrace-${VERSION}-setup.exe"

# ── Docker build ───────────────────────────────────────────────────────────
if [[ "${1:-}" == "--docker" ]]; then
  echo ">>> Building installer via Docker …"
  docker build \
    -f "${SCRIPT_DIR}/Dockerfile.installer" \
    -t livetrace-installer \
    "${PROJECT_ROOT}"

  docker run --rm \
    -v "${PROJECT_ROOT}/dist":/out \
    livetrace-installer

  echo ""
  echo "✓ Done: ${PROJECT_ROOT}/dist/${OUTPUT}"
  exit 0
fi

# ── Native build ───────────────────────────────────────────────────────────
if ! command -v makensis &>/dev/null; then
  echo "ERROR: makensis not found."
  echo "       Install:  sudo apt install nsis"
  echo "       Or run:   $0 --docker"
  exit 1
fi

SRC_EXE="${PROJECT_ROOT}/dist/livetrace-windows-amd64.exe"
if [[ ! -f "${SRC_EXE}" ]]; then
  echo "ERROR: ${SRC_EXE} not found."
  echo "       Run your Go build first, e.g.:"
  echo "         GOOS=windows GOARCH=amd64 go build -o dist/livetrace-windows-amd64.exe ./src"
  exit 1
fi

echo ">>> Building installer with makensis …"
# Copy binary next to the .nsi script so NSIS can find it
cp "${SRC_EXE}" "${SCRIPT_DIR}/livetrace-windows-amd64.exe"

cd "${SCRIPT_DIR}"
makensis livetrace-installer.nsi

# Move the output to dist/
mv "${SCRIPT_DIR}/${OUTPUT}" "${PROJECT_ROOT}/dist/${OUTPUT}"
rm -f "${SCRIPT_DIR}/livetrace-windows-amd64.exe"

echo ""
echo "✓ Done: ${PROJECT_ROOT}/dist/${OUTPUT}"
echo "  Size: $(du -sh "${PROJECT_ROOT}/dist/${OUTPUT}" | cut -f1)"