#!/bin/bash
#
# windows-bundle-runtime.sh
#
# Make a freshly-built Windows prebuilt self-contained so it can be used WITHOUT
# MSYS2/MinGW or any compiler on the target machine. We copy the addon's entire
# transitive MinGW DLL closure next to the .node, plus the GObject-Introspection
# typelibs and runtime data it needs at runtime.
#
# The set of bundled libraries is driven by the curated seed list
# windows/runtime-libraries.txt (also a user-facing reference). The exact
# resolved DLL set is written to <binding-dir>/bundled-dlls.txt.
#
# Run inside the MINGW64 shell, after building.
#
#   ./scripts/windows-bundle-runtime.sh lib/binding/node-v127-win32-x64
#
set -euo pipefail

SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)

BINDING_DIR="${1:?usage: windows-bundle-runtime.sh <binding-dir> [runtime-libraries.txt]}"
# The curated seed list lives in a text file so it doubles as user-facing
# reference (windows/runtime-libraries.txt). Override with $2 if needed.
LIBS_FILE="${2:-$SCRIPT_DIR/../windows/runtime-libraries.txt}"
# MinGW bin dir the seed names resolve against.
MB="${MINGW_BIN:-/mingw64/bin}"

NODE_FILE="$BINDING_DIR/node_gtk.node"

if [ ! -f "$NODE_FILE" ]; then
  echo "error: $NODE_FILE not found"
  ls -la "$BINDING_DIR" || true
  exit 1
fi
if [ ! -f "$LIBS_FILE" ]; then
  echo "error: seed list $LIBS_FILE not found"
  exit 1
fi

# GObject-Introspection loads each namespace's shared library at runtime via
# g_module_open() when you call gi.require('Gtk', ...). Those libraries
# (libgio, libgtk, libgdk, libpango, libgdk_pixbuf, ...) are NOT linked by
# node_gtk.node, so ntldd on the addon alone misses them. We therefore seed the
# closure from the addon AND from the GTK runtime libraries listed in LIBS_FILE.
echo "## Seed libraries from $LIBS_FILE"
ENTRY_LIBS=("$NODE_FILE")
while IFS= read -r line; do
  # strip comments and surrounding whitespace; skip blanks
  name="${line%%#*}"
  name="$(echo "$name" | tr -d '[:space:]')"
  [ -z "$name" ] && continue
  if [ -f "$MB/$name" ]; then
    ENTRY_LIBS+=("$MB/$name")
    echo "  - $name"
  else
    echo "  (skip missing seed $name)"
  fi
done < "$LIBS_FILE"

echo "## Computing recursive DLL closure for the addon + GTK runtime"
# ntldd -R prints every transitive dependency with its resolved Windows path:
#   libgtk-3-0.dll => C:\msys64\mingw64\bin\libgtk-3-0.dll (0x...)
# Collect the union of every entry's closure, keep only MinGW-provided DLLs
# (skip C:\Windows\System32 OS DLLs), and copy them next to the .node.
: > /tmp/dll-closure.txt
for lib in "${ENTRY_LIBS[@]}"; do
  [ -f "$lib" ] || { echo "  (skip missing entry $lib)"; continue; }
  # the entry library itself (when it is one of the GTK runtime DLLs)
  case "$lib" in *mingw64*) echo "$lib" >> /tmp/dll-closure.txt ;; esac
  ntldd -R "$lib" \
    | sed -n 's/.* => \(.*\) (0x.*/\1/p' \
    | while IFS= read -r winpath; do
        [ -z "$winpath" ] && continue
        u=$(cygpath -u "$winpath" 2>/dev/null || echo "$winpath")
        case "$u" in *mingw64*) echo "$u" >> /tmp/dll-closure.txt ;; esac
      done
done

copied=0
sort -u /tmp/dll-closure.txt | while IFS= read -r u; do
  if [ -f "$u" ]; then
    cp -f "$u" "$BINDING_DIR/"
    echo "  + $(basename "$u")"
    copied=$((copied + 1))
  fi
done
DLL_COUNT=$(ls "$BINDING_DIR"/*.dll 2>/dev/null | wc -l | tr -d ' ')
echo "## DLLs bundled into $BINDING_DIR ($DLL_COUNT total)"

# Write the exact set that shipped, as a reference manifest (ships in the
# bundle and the artifact). Generated from the curated seed list above.
MANIFEST="$BINDING_DIR/bundled-dlls.txt"
{
  echo "# bundled-dlls.txt — Windows DLLs shipped with this node-gtk prebuilt."
  echo "# GENERATED by scripts/windows-bundle-runtime.sh; do not edit by hand."
  echo "# Edit the curated seed list windows/runtime-libraries.txt instead."
  echo "# $DLL_COUNT DLLs, expanded from the seed list via 'ntldd -R'."
  echo "#"
  ( cd "$BINDING_DIR" && ls -1 *.dll 2>/dev/null | sort )
} > "$MANIFEST"
echo "## Wrote manifest $MANIFEST"

echo "## Bundling GObject-Introspection typelibs"
TYPELIB_SRC=$(pkg-config --variable=typelibdir gobject-introspection-1.0 2>/dev/null || true)
if [ -z "$TYPELIB_SRC" ] || [ ! -d "$TYPELIB_SRC" ]; then
  TYPELIB_SRC=/mingw64/lib/girepository-1.0
fi
TYPELIB_DST="$BINDING_DIR/girepository-1.0"
mkdir -p "$TYPELIB_DST"
# Copy the full typelib set; it is small and guarantees every transitive
# namespace dependency (Gdk, Pango, cairo, GdkPixbuf, Graphene, ...) is present.
cp -f "$TYPELIB_SRC"/*.typelib "$TYPELIB_DST/"
echo "## Typelibs bundled from $TYPELIB_SRC -> $TYPELIB_DST"

# ---------------------------------------------------------------------------
# Runtime DATA a real GTK4/Adwaita app needs at run time (beyond DLLs/typelibs).
# These are copied so we can MEASURE the realistic bundle size and ship a
# self-contained app. cp is best-effort: a missing source is not fatal.
# ---------------------------------------------------------------------------
copy_tree() { # src dst
  if [ -d "$1" ]; then mkdir -p "$2"; cp -rf "$1"/. "$2"/ 2>/dev/null || true; fi
}

echo "## Bundling runtime data (loaders, schemas, icons, gtksourceview)"
# gdk-pixbuf image loaders (PNG/SVG/... — needed for icons/images)
copy_tree /mingw64/lib/gdk-pixbuf-2.0 "$BINDING_DIR/lib/gdk-pixbuf-2.0"
# compiled GSettings schemas (GTK4/Adw/GtkSourceView read settings)
copy_tree /mingw64/share/glib-2.0/schemas "$BINDING_DIR/share/glib-2.0/schemas"
# icon themes (Adwaita + hicolor fallback) — typically the biggest chunk
copy_tree /mingw64/share/icons/Adwaita "$BINDING_DIR/share/icons/Adwaita"
copy_tree /mingw64/share/icons/hicolor "$BINDING_DIR/share/icons/hicolor"
# GtkSourceView language definitions + style schemes
copy_tree /mingw64/share/gtksourceview-5 "$BINDING_DIR/share/gtksourceview-5"

# Make the gdk-pixbuf loaders cache path-portable: the build machine bakes in
# absolute paths to each loader DLL, which don't exist on the user's machine.
# Rewrite each loader path to its bare file name; lib/native.js puts the loaders
# dir on PATH so g_module_open() resolves the bare name at run time.
LOADER_CACHE="$BINDING_DIR/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache"
if [ -f "$LOADER_CACHE" ]; then
  sed -i -E 's#^"[^"]*[\\/]([^"\\/]+\.dll)"#"\1"#' "$LOADER_CACHE"
  echo "## Rewrote $LOADER_CACHE to portable (bare) loader names"
fi

echo
echo "## ===== SIZE BREAKDOWN ====="
size() { # label dir-or-glob
  local label="$1"; shift
  local total
  total=$(du -ch "$@" 2>/dev/null | tail -1 | cut -f1)
  printf '  %-26s %s\n' "$label" "${total:-0}"
}
size "DLLs (load-critical)"        "$BINDING_DIR"/*.dll
size "typelibs (load-critical)"    "$TYPELIB_DST"
size "  + .node"                   "$NODE_FILE"
size "gdk-pixbuf loaders"          "$BINDING_DIR/lib/gdk-pixbuf-2.0"
size "glib schemas"                "$BINDING_DIR/share/glib-2.0/schemas"
size "icons (Adwaita+hicolor)"     "$BINDING_DIR/share/icons"
size "gtksourceview data"          "$BINDING_DIR/share/gtksourceview-5"
echo "  --------------------------------------"
size "TOTAL (uncompressed)"        "$BINDING_DIR"
echo "## =========================="