#!/bin/bash

set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
VERSION="${1:-${VERSION:-0.0.0}}"
VERSION="${VERSION#v}"
# Debian versions must start with a digit; fall back to 0.0.0+<sha/tag>.
if [[ ! "$VERSION" =~ ^[0-9] ]]; then
  VERSION="0.0.0+${VERSION}"
fi
ARCH="${ARCH:-$(dpkg --print-architecture)}"
BUILD_DIR="${BUILD_DIR:-$ROOT_DIR/build-$ARCH}"
DIST_DIR="$ROOT_DIR/dist"
STAGE_DIR="$BUILD_DIR/deb"
QMAKE_BIN="${QMAKE_BIN:-qmake}"
MAKE_JOBS="${MAKE_JOBS:-2}"

QMAKE_ARGS=()
if [[ -n "${QMAKESPEC:-}" ]]; then
  QMAKE_ARGS+=("-spec" "$QMAKESPEC")
fi
if [[ -n "${QMAKE_QTCONF:-}" ]]; then
  QMAKE_ARGS+=("-qtconf" "$QMAKE_QTCONF")
fi
if [[ -n "${QMAKE_CC:-}" ]]; then
  QMAKE_ARGS+=("QMAKE_CC=$QMAKE_CC")
fi
if [[ -n "${QMAKE_CXX:-}" ]]; then
  QMAKE_ARGS+=("QMAKE_CXX=$QMAKE_CXX")
fi
if [[ -n "${QMAKE_LINK:-}" ]]; then
  QMAKE_ARGS+=("QMAKE_LINK=$QMAKE_LINK")
fi
if [[ -n "${QMAKE_CFLAGS:-}" ]]; then
  QMAKE_ARGS+=("QMAKE_CFLAGS=$QMAKE_CFLAGS")
fi
if [[ -n "${QMAKE_CXXFLAGS:-}" ]]; then
  QMAKE_ARGS+=("QMAKE_CXXFLAGS=$QMAKE_CXXFLAGS")
fi
if [[ -n "${QMAKE_LFLAGS:-}" ]]; then
  QMAKE_ARGS+=("QMAKE_LFLAGS=$QMAKE_LFLAGS")
fi

PACKAGE_NAME="slide"

cd "$ROOT_DIR"
mkdir -p "$BUILD_DIR"
"$QMAKE_BIN" "${QMAKE_ARGS[@]}" "$ROOT_DIR/src/slide.pro" -o "$BUILD_DIR/Makefile"
make -C "$BUILD_DIR" -j"$MAKE_JOBS"

rm -rf "$STAGE_DIR"
mkdir -p "$STAGE_DIR/DEBIAN" "$STAGE_DIR/usr/local/bin" "$DIST_DIR"

install -m 0755 "$BUILD_DIR/slide" "$STAGE_DIR/usr/local/bin/slide"

cat > "$STAGE_DIR/DEBIAN/control" <<EOF
Package: ${PACKAGE_NAME}
Version: ${VERSION}
Section: graphics
Priority: optional
Architecture: ${ARCH}
Maintainer: slide build
Depends: libqt5core5a, libqt5gui5, libqt5widgets5, libqt5network5, libexif12, qt5-image-formats-plugins, libmosquitto1
Description: Lightweight slideshow for photo frames
 Simple, lightweight slideshow designed for low power devices.
EOF

dpkg-deb --build -Zgzip "$STAGE_DIR" "$DIST_DIR/${PACKAGE_NAME}_${VERSION}_${ARCH}.deb"