#!/usr/bin/env bash

SDLDEV_VERS=2.0.14
SDLTTF_VERS=2.0.15
SODIUM_VERS=1.0.18
ZLIB_VERS=1.2.11

# exit when any command fails
set -euo pipefail

# detect architecture from script name
if echo "$(basename $0)" | grep -q 64; then
    MINGW_ARCH=x86_64-w64-mingw32
    SODIUM_ARCH=win64
else
    MINGW_ARCH=i686-w64-mingw32
    SODIUM_ARCH=win32
fi

# set MINGW_PREFIX
MINGW_PREFIX=/usr/${MINGW_ARCH}
if [ ! -d "${MINGW_PREFIX}" ]; then
    echo "MinGW prefix not found (${MINGW_PREFIX})"
    exit 1
else
    echo "Installing to ${MINGW_PREFIX}"
fi

# only use sudo when necessary
if [ `id -u` -ne 0 ]; then
    SUDO=sudo
else
    SUDO=""
fi

wget -q https://www.libsdl.org/release/SDL2-devel-${SDLDEV_VERS}-mingw.tar.gz -OSDL2-devel-${SDLDEV_VERS}-mingw.tar.gz
tar -xzf SDL2-devel-${SDLDEV_VERS}-mingw.tar.gz
wget -q https://www.libsdl.org/projects/SDL_ttf/release/SDL2_ttf-devel-${SDLTTF_VERS}-mingw.tar.gz -OSDL2_ttf-devel-${SDLTTF_VERS}-mingw.tar.gz
tar -xzf SDL2_ttf-devel-${SDLTTF_VERS}-mingw.tar.gz
$SUDO cp -r SDL2*/${MINGW_ARCH}/* ${MINGW_PREFIX}

wget -q https://github.com/jedisct1/libsodium/releases/download/${SODIUM_VERS}-RELEASE/libsodium-${SODIUM_VERS}-mingw.tar.gz -Olibsodium-${SODIUM_VERS}-mingw.tar.gz
tar -xzf libsodium-${SODIUM_VERS}-mingw.tar.gz --no-same-owner
$SUDO cp -r libsodium-${SODIUM_ARCH}/* ${MINGW_PREFIX}

wget -q https://zlib.net/zlib-${ZLIB_VERS}.tar.gz -Ozlib-${ZLIB_VERS}.tar.gz
tar -xzf zlib-${ZLIB_VERS}.tar.gz
$SUDO cp zlib-${ZLIB_VERS}/zconf.h ${MINGW_PREFIX}/include
$SUDO cp zlib-${ZLIB_VERS}/zlib.h ${MINGW_PREFIX}/include
$SUDO ln -sf ../bin/zlib1.dll ${MINGW_PREFIX}/lib/libzlib1.dll.a

# Fixup pkgconfig prefix:
find "${MINGW_PREFIX}/lib/pkgconfig/" -name '*.pc' -exec \
  $SUDO sed -i "s|^prefix=.*|prefix=${MINGW_PREFIX}|" '{}' \;

# Fixup CMake prefix:
find "${MINGW_PREFIX}" -name '*.cmake' -exec \
  $SUDO sed -i "s|/opt/local/${MINGW_ARCH}|${MINGW_PREFIX}|" '{}' \;

# Fixup SDL2's cmake file
# See https://github.com/libsdl-org/SDL/issues/3665
sed "s|@prefix@|${MINGW_PREFIX}|;
s|@exec_prefix@|\${prefix}|;
s|@libdir@|\${exec_prefix}/lib|;
s|@includedir@|\${prefix}/include|;
s|@SDL_RLD_FLAGS@||;
s|@SDL_LIBS@||;
" "$(dirname $0)"/sdl2-config.cmake.in | $SUDO tee "${MINGW_PREFIX}/lib/cmake/SDL2/sdl2-config.cmake" > /dev/null