#!/usr/bin/env bash

linker="x86_64-w64-mingw32-ld"

# Read project directory
proj_dir=`realpath "$1"`
shift

# Read output file destinations
resources_o=`realpath "$1"`
shift
resources_h=`realpath "$1"`
shift

# Make sure that the header does not exist
rm -f "${resources_h}"
rm -f "${resources_o}"

# Recomupte relative paths to parameters
idx=0
resource_files=()

for path in "$@"
do
    resource_files["${idx}"]=`realpath --relative-to="${proj_dir}" "${path}"`
    idx="$(("${idx}" + 1))"
done

# Create the object file
pushd "${proj_dir}" >> /dev/null
$linker -r -b binary -o "${resources_o}" "${resource_files[@]}"
popd >> /dev/null

# Include stddef.h in the resources header (for size_t)
echo "#include <stddef.h>" >> "${resources_h}"

for resource in "${resource_files[@]}"
do
    # Use relative path to the resource as the variable name
    var_name="_binary_${resource}"

    # Replace all non-alphanumeric characters with underscores
    var_name=`printf "${var_name}" | sed "s/[^a-zA-Z0-9]/_/g"`

    # Define externs in the header
    echo "extern void *${var_name}_start;" >> "${resources_h}"
    echo "extern void *${var_name}_size;" >> "${resources_h}"
    echo "" >> "${resources_h}"
done