#!/usr/bin/env bash
# Builds a self-contained Windows release zip from Linux:
#   tools/package_windows.sh [version]      ->  dist/BrandlingSafari-<version>-win64.zip
#
# Needs: x86_64-w64-mingw32-g++ (Arch: mingw-w64-gcc), cmake, ninja, curl, zstd-capable tar, zip.
# The Windows libraries (GLFW, libepoxy, SQLite, ...) come from the MSYS2 ucrt64 repository and
# are cached in ~/.cache/brandling-safari/msys2-ucrt64. The engine checkout is ../Vibe-HD-2D
# (or $HD2D_ENGINE_DIR).
set -euo pipefail

ROOT="$(cd "$(dirname "$0")/.." && pwd)"
ENGINE="${HD2D_ENGINE_DIR:-$ROOT/../Vibe-HD-2D}"
VERSION="${1:-$(git -C "$ROOT" describe --tags --always --dirty 2>/dev/null || echo dev)}"
NAME="BrandlingSafari-$VERSION-win64"
CACHE="${XDG_CACHE_HOME:-$HOME/.cache}/brandling-safari/msys2-ucrt64"
SYSROOT="$CACHE/ucrt64"
BUILD="$ROOT/build_win"
STAGE="$ROOT/dist/$NAME"
REPO="https://repo.msys2.org/mingw/ucrt64"
PACKAGES=(glfw libepoxy sqlite3 nlohmann-json glm libwinpthread)

# --- 1. Windows libraries ------------------------------------------------------
mkdir -p "$CACHE"
if [[ ! -f "$CACHE/.done" ]]; then
    echo "== downloading MSYS2 ucrt64 packages"
    curl -fsSL "$REPO/" -o "$CACHE/index.html"
    for p in "${PACKAGES[@]}"; do
        f=$(grep -oE "mingw-w64-ucrt-x86_64-$p-[0-9][^\"]*-any\.pkg\.tar\.zst\"" "$CACHE/index.html" | tr -d '"' | sort -V | tail -1)
        [[ -n "$f" ]] || { echo "package $p not found in $REPO" >&2; exit 1; }
        echo "   $f"
        curl -fsSL "$REPO/$f" -o "$CACHE/$f"
        tar --zstd -xf "$CACHE/$f" -C "$CACHE" 2>/dev/null
    done
    touch "$CACHE/.done"
fi

# --- 2. Build ------------------------------------------------------------------
echo "== building"
cmake -S "$ROOT" -B "$BUILD" -G Ninja -DCMAKE_BUILD_TYPE=Release \
      -DCMAKE_TOOLCHAIN_FILE="$ROOT/cmake/mingw-w64-x86_64.cmake" -DMINGW_SYSROOT="$SYSROOT" \
      -DHD2D_ENGINE_DIR="$ENGINE" > /dev/null
ninja -C "$BUILD" safari_client safari_server

# --- 3. Stage --------------------------------------------------------------------
echo "== staging $STAGE"
rm -rf "$STAGE"
mkdir -p "$STAGE/assets" "$STAGE/engine/textures" "$STAGE/engine/models"
cp "$BUILD/safari_client.exe" "$BUILD/safari_server.exe" "$STAGE/"
x86_64-w64-mingw32-strip "$STAGE"/*.exe

# Every non-system DLL the executables import (one level deep is enough: the MSYS2 DLLs
# used here only import Windows system DLLs).
for dll in $(x86_64-w64-mingw32-objdump -p "$STAGE"/*.exe | awk '/DLL Name/ {print $3}' | sort -u); do
    for dir in "$SYSROOT/bin" /usr/x86_64-w64-mingw32/bin; do
        if [[ -f "$dir/$dll" ]]; then cp "$dir/$dll" "$STAGE/"; break; fi
    done
done

# Game assets (no review sheets, no Blender texture sources: the .glb embeds them).
cp -r "$ROOT/assets/characters" "$ROOT/assets/data" "$STAGE/assets/"
mkdir -p "$STAGE/assets/creatures" "$STAGE/assets/models"
cp -r "$ROOT/assets/creatures/sprites" "$ROOT/assets/creatures/roster.json" "$STAGE/assets/creatures/"
cp "$ROOT/assets/models/safari.glb" "$STAGE/assets/models/"
# Engine assets the game uses.
cp -r "$ENGINE/assets/shaders" "$ENGINE/assets/fonts" "$STAGE/engine/"
cp "$ENGINE"/assets/textures/*.png "$STAGE/engine/textures/"
cp "$ENGINE/assets/models/scenery.glb" "$STAGE/engine/models/"

cat > "$STAGE/README.txt" <<EOF
Brandling Safari $VERSION (Windows, 64-bit)

PLAY
  Double-click safari_client.exe.
  - Host & Play: starts a game on this PC that friends on the same network can join.
    Windows Firewall will ask about safari_server.exe the first time: allow it on
    private networks (UDP ports 27420 and 27421).
  - Join a LAN Game: lists games found on your network, or type the host's IP address.
  Windows may show "Windows protected your PC" because the game is not code-signed:
  click "More info" then "Run anyway".

CONTROLS
  WASD / arrows move, Shift run, Space throw a Safari Capsule, F cast / reel a fishing line,
  E talk to Professor Henry, Tab your Brandlings, Enter chat, Q/E or right-drag camera,
  mouse wheel zoom, Esc menu, F12 screenshot.

DEDICATED SERVER
  safari_server.exe --port 27420 --name "My Safari"     (type "help" in its window)

Saves, your identity and server.log are in %APPDATA%\\brandling-safari.
Needs a GPU with OpenGL 4.5 (any GPU from the last ~10 years with current drivers).
EOF
sed -i 's/$/\r/' "$STAGE/README.txt"

# --- 4. Zip -------------------------------------------------------------------------
rm -f "$ROOT/dist/$NAME.zip"
(cd "$ROOT/dist" && zip -qr9 "$NAME.zip" "$NAME")
echo "== $(du -h "$ROOT/dist/$NAME.zip" | cut -f1)  $ROOT/dist/$NAME.zip"