#!/bin/sh

if [ "$#" -eq 0 ]; then
    programname=$(basename "$0")
    echo "ERROR: No program supplied"
    echo
    echo "Usage: $programname <program>"
    exit 1
fi

# Names of executables that we do not want LD_PRELOAD set for
DISABLE_LD_PRELOAD=("cs2.sh")

# Combine all command line arguments into a single string
command_line="$0 $@"
disable_preload=false

MANGOHUD_LIB_NAME="@ld_libdir_mangohud@libMangoHud_opengl.so"

if [ "$1" = "--dlsym" ]; then
    MANGOHUD_LIB_NAME="@ld_libdir_mangohud@libMangoHud_dlsym.so:${MANGOHUD_LIB_NAME}"
    shift  # shift will only be executed if $1 is "--dlsym"
elif [ "$MANGOHUD_DLSYM" = "1" ]; then
    MANGOHUD_LIB_NAME="@ld_libdir_mangohud@libMangoHud_dlsym.so:${MANGOHUD_LIB_NAME}"
fi

if [ "$1" = "--version" ]; then
    echo @version@
    exit 0
fi

# Check if any of the names in DISABLE_LD_PRELOAD are in the command line
for name in "${DISABLE_LD_PRELOAD[@]}"; do
    if echo "$command_line" | grep -q "$name"; then
        disable_preload=true
        break
    fi
done

if [ "$disable_preload" = true ]; then
    exec env MANGOHUD=1 "$@"
else
    # Make sure we don't append mangohud lib multiple times
    # otherwise, this could cause issues with the steam runtime
    case ":${LD_PRELOAD-}:" in
        (*:$MANGOHUD_LIB_NAME:*)
            ;;
        (*)
            # Preload using the plain filenames of the libs, the dynamic linker will
            # figure out whether the 32 or 64 bit version should be used
            LD_PRELOAD="${LD_PRELOAD:+$LD_PRELOAD:}${MANGOHUD_LIB_NAME}"
    esac

    exec env MANGOHUD=1 LD_PRELOAD="${LD_PRELOAD}" "$@"
fi