#!/bin/sh
# windows/build-msi.sh — produce lmcp-<ver>.msi on Linux via wixl.
#
# This is the first-time-discovered cross-build path: download Lua 5.4
# Win64 binaries from LuaBinaries, cross-compile LuaSocket with mingw-w64,
# stage windows/pkg/lua/, then invoke wixl on the WiX manifest.
#
# Avoids the VM106-clone + WiX-on-Windows path entirely. ~1 minute on a
# warm cache; ~3-5 minutes cold (downloads ~700 KB + cross-compiles).
#
# Prereqs (apt install on Debian aarch64):
#   apt-get install -y wixl unzip gcc-mingw-w64-x86-64 binutils-mingw-w64-x86-64 \
#                      mingw-w64-x86-64-dev
#
# Usage: ./build-msi.sh [output_dir]
#   Output: $output_dir/lmcp-<ver>.msi (default: $PWD)
#
# Version comes from windows/lmcp.wxs Version="…" attribute.
set -eu

here=$(dirname "$(readlink -f "$0")")
root=$(cd "$here/.." && pwd)
out_dir=${1:-$PWD}
work=$(mktemp -d /tmp/lmcp-msi-XXXXXX)
trap "rm -rf $work" EXIT

# Versions — bump as upstream releases.
LUA_VER=5.4.2
LUASOCKET_VER=3.1.0

# Pull current lmcp version from the WiX manifest.
lmcp_ver=$(sed -n 's/.*Version="\([^"]*\)".*/\1/p' "$here/lmcp.wxs" | head -1)
[ -n "$lmcp_ver" ] || { echo "build-msi.sh: cannot parse Version from lmcp.wxs" >&2; exit 1; }

echo "build-msi.sh: lmcp $lmcp_ver, lua $LUA_VER, luasocket $LUASOCKET_VER"

echo "==> 1/5 sync lmcp .lua sources into pkg/"
"$here/sync.sh"

echo "==> 2/5 fetch lua $LUA_VER win64 binaries + dev library"
cd "$work"
curl -sSLf -o lua-bin.zip \
    "https://downloads.sourceforge.net/project/luabinaries/${LUA_VER}/Tools%20Executables/lua-${LUA_VER}_Win64_bin.zip"
curl -sSLf -o lua-lib.zip \
    "https://downloads.sourceforge.net/project/luabinaries/${LUA_VER}/Windows%20Libraries/Dynamic/lua-${LUA_VER}_Win64_dllw6_lib.zip"
mkdir -p luabin lualib include/lua/54 include/lua54 bin/lua/54 bin/lua54 lib/lua/54 lib/lua54
unzip -q -o lua-bin.zip -d luabin
unzip -q -o lua-lib.zip -d lualib
cp lualib/include/*.h include/lua/54/
cp lualib/include/*.h include/lua54/
cp lualib/liblua54.a lib/lua/54/
cp lualib/liblua54.a lib/lua54/
cp lualib/lua54.dll bin/lua/54/
cp lualib/lua54.dll bin/lua54/

echo "==> 3/5 cross-compile LuaSocket $LUASOCKET_VER for win64"
curl -sSLf -o luasocket.tar.gz \
    "https://github.com/lunarmodules/luasocket/archive/refs/tags/v${LUASOCKET_VER}.tar.gz"
tar xzf luasocket.tar.gz
cd "luasocket-${LUASOCKET_VER}"
make -s PLAT=mingw \
    CC=x86_64-w64-mingw32-gcc \
    LD=x86_64-w64-mingw32-gcc \
    LUAV=54 \
    LUAINC_mingw_base="$work/include" \
    LUALIB_mingw_base="$work/bin" \
    > /dev/null

echo "==> 4/5 stage pkg/lua/"
pkg_lua="$here/pkg/lua"
rm -rf "$pkg_lua"
mkdir -p "$pkg_lua/socket" "$pkg_lua/mime"

# WiX manifest expects "lua.exe" (not "lua54.exe").
cp "$work/luabin/lua54.exe"        "$pkg_lua/lua.exe"
cp "$work/luabin/lua54.dll"        "$pkg_lua/lua54.dll"
cp src/socket.lua                  "$pkg_lua/"
cp src/mime.lua                    "$pkg_lua/"
cp src/ltn12.lua                   "$pkg_lua/"
cp src/socket-3.0.0.dll            "$pkg_lua/socket/core.dll"
cp src/ftp.lua                     "$pkg_lua/socket/"
cp src/headers.lua                 "$pkg_lua/socket/"
cp src/http.lua                    "$pkg_lua/socket/"
cp src/smtp.lua                    "$pkg_lua/socket/"
cp src/tp.lua                      "$pkg_lua/socket/"
cp src/url.lua                     "$pkg_lua/socket/"
cp src/mime-1.0.3.dll              "$pkg_lua/mime/core.dll"

echo "==> 5/5 wixl: produce MSI"
# wixl wants forward slashes; rewrite Windows-style backslashes in Source=.
wxs_tmp="$work/lmcp.wxs"
sed 's|Source="pkg\\|Source="pkg/|g; s|\\\([a-zA-Z]\)|/\1|g' "$here/lmcp.wxs" > "$wxs_tmp"
mkdir -p "$out_dir"
out_msi="$out_dir/lmcp-${lmcp_ver}.msi"
(cd "$here" && wixl -v "$wxs_tmp" -o "$out_msi")

echo ""
echo "==> done: $out_msi"
ls -la "$out_msi"
sha256sum "$out_msi"