#!/usr/bin/env bash
#
# Build + package Ultimate Media Tracker for Windows.
# Run from the project root inside the MSYS2 *MINGW64* shell.
#
# Usage:
#   ./build-windows.sh           configure + build + bundle (+ installer)
#   ./build-windows.sh clean     wipe build/dist first
#
# Produces:
#   dist/                          portable build (zip & ship this folder)
#   UltimateMediaTracker-Setup.exe NSIS installer (if makensis is installed)
#
set -euo pipefail
cd "$(dirname "$0")"

BUILD_DIR="build-win"
DIST_DIR="dist"
EXE="umt.exe"
BUILD_TYPE="${BUILD_TYPE:-Release}"

# Must run in the MINGW64 environment so CMake finds Qt under /mingw64.
if [[ "${MSYSTEM:-}" != "MINGW64" ]]; then
    echo "ERROR: run this from the MSYS2 MINGW64 shell (MSYSTEM=MINGW64)." >&2
    exit 1
fi

WINDEPLOY="$(command -v windeployqt6 || command -v windeployqt || true)"
if [[ -z "$WINDEPLOY" ]]; then
    echo "ERROR: windeployqt not found. Install with:" >&2
    echo "       pacman -S mingw-w64-x86_64-qt6-tools" >&2
    exit 1
fi

if [[ "${1:-}" == "clean" ]]; then
    echo "==> Removing $BUILD_DIR and $DIST_DIR"
    rm -rf "$BUILD_DIR" "$DIST_DIR"
fi

echo "==> Configuring ($BUILD_TYPE)"
# Set the generator only on a fresh dir; reusing one with -G errors out.
GEN=()
if [[ ! -f "$BUILD_DIR/CMakeCache.txt" ]]; then
    GEN=(-G Ninja)
fi
cmake -S . -B "$BUILD_DIR" "${GEN[@]}" -DCMAKE_BUILD_TYPE="$BUILD_TYPE"

echo "==> Building"
cmake --build "$BUILD_DIR" -j

echo "==> Assembling $DIST_DIR"
rm -rf "$DIST_DIR"
mkdir -p "$DIST_DIR"
cp "$BUILD_DIR/$EXE" "$DIST_DIR/"

echo "==> Running windeployqt"
"$WINDEPLOY" --release --no-translations "$DIST_DIR/$EXE"

echo "==> Bundling MinGW runtime + transitive dependencies"
# windeployqt does not copy third-party MinGW DLLs (harfbuzz, freetype, png,
# pcre2, zlib, glib, libgcc/libstdc++/winpthread ...). Resolve them via ldd and
# repeat a few passes so transitive deps (incl. those of the deployed plugins)
# are all picked up.
( cd "$DIST_DIR"
  for _ in $(seq 1 6); do
    find . \( -name '*.exe' -o -name '*.dll' \) -print0 \
      | xargs -0 -I{} ldd "{}" 2>/dev/null \
      | grep -io '/mingw64/bin/[^ ]*\.dll' \
      | sort -u \
      | while read -r f; do
          [ -e "./$(basename "$f")" ] || cp "$f" .
        done
  done
)

echo "==> Verifying dependencies"
if command -v ntldd >/dev/null 2>&1; then
    missing="$(cd "$DIST_DIR" && ntldd -R "$EXE" 2>/dev/null | grep -i 'not found' || true)"
    if [[ -n "$missing" ]]; then
        echo "WARNING: unresolved dependencies remain:" >&2
        echo "$missing" >&2
    else
        echo "    all dependencies resolved."
    fi
else
    echo "    (install mingw-w64-x86_64-ntldd to auto-verify)"
fi

if command -v makensis >/dev/null 2>&1; then
    echo "==> Building NSIS installer"
    makensis installer.nsi
    echo "==> Installer: UltimateMediaTracker-Setup.exe"
else
    echo "NOTE: makensis not found; skipping installer."
    echo "      Install it with: pacman -S mingw-w64-x86_64-nsis"
fi

echo
echo "==> Done. Portable build in: $DIST_DIR/"