#!/bin/bash
# Configuration script for the feddy project

usage() {
    cat <<EOF
Usage: $0 [OPTION]...

Configuration options:
  --help                   display this help message
  --build=BUILD            system on which the package is built
  --host=HOST              system on which the package will run
  --program-prefix=PREFIX  prefix for installed program names
  --disable-dependency-tracking
                           disable dependency tracking
  --prefix=DIR             install files in PREFIX [/usr/local]
  --exec-prefix=DIR        install binaries in EPREFIX [PREFIX]
  --bindir=DIR             install user executables in DIR [EPREFIX/bin]
  --sbindir=DIR            install admin executables in DIR [EPREFIX/sbin]
  --sysconfdir=DIR         install configuration files in DIR [PREFIX/etc]
  --datadir=DIR            install data files in DIR [PREFIX/share]
  --includedir=DIR         install headers in DIR [PREFIX/include]
  --libdir=DIR             install libraries in DIR [EPREFIX/lib]
  --libexecdir=DIR         install internal programs in DIR [EPREFIX/libexec]
  --localstatedir=DIR      install variable state data in DIR [PREFIX/var]
  --sharedstatedir=DIR     install modifiable state data in DIR [PREFIX/com]
  --mandir=DIR             install man pages in DIR [DATADIR/man]
  --infodir=DIR            install info files in DIR [DATADIR/info]
EOF
    exit 0
}

# Default values
build="$(uname -m)-unknown-linux"
host="$(uname -m)-unknown-linux"
program_prefix=''
dependency_tracking='yes'
prefix='/usr/local'
exec_prefix='${prefix}'
bindir='${exec_prefix}/bin'
sbindir='${exec_prefix}/sbin'
sysconfdir='${prefix}/etc'
datadir='${prefix}/share'
includedir='${prefix}/include'
libdir='${exec_prefix}/lib'
libexecdir='${exec_prefix}/libexec'
localstatedir='${prefix}/var'
sharedstatedir='${prefix}/com'
mandir='${datadir}/man'
infodir='${datadir}/info'

# Argument processing
for arg in "$@"; do
    case $arg in
        --help)
            usage
            ;;
        --build=*)
            build="${arg#*=}"
            ;;
        --host=*)
            host="${arg#*=}"
            ;;
        --program-prefix=*)
            program_prefix="${arg#*=}"
            ;;
        --disable-dependency-tracking)
            dependency_tracking="yes"
            ;;
        --prefix=*)
            prefix="${arg#*=}"
            ;;
        --exec-prefix=*)
            exec_prefix="${arg#*=}"
            ;;
        --bindir=*)
            bindir="${arg#*=}"
            ;;
        --sbindir=*)
            sbindir="${arg#*=}"
            ;;
        --sysconfdir=*)
            sysconfdir="${arg#*=}"
            ;;
        --datadir=*)
            datadir="${arg#*=}"
            ;;
        --includedir=*)
            includedir="${arg#*=}"
            ;;
        --libdir=*)
            libdir="${arg#*=}"
            ;;
        --libexecdir=*)
            libexecdir="${arg#*=}"
            ;;
        --localstatedir=*)
            localstatedir="${arg#*=}"
            ;;
        --sharedstatedir=*)
            sharedstatedir="${arg#*=}"
            ;;
        --mandir=*)
            mandir="${arg#*=}"
            ;;
        --infodir=*)
            infodir="${arg#*=}"
            ;;
        *)
            ;;
    esac
done

# Check for cargo (required for compilation)
if ! command -v cargo &> /dev/null; then
    echo "Error: cargo is required but not installed. Please install Rust and cargo."
    exit 1
fi

# Generate Makefile.config
cat > Makefile.config <<EOF
# Automatically generated by the configure script
build = $build
host = $host
program_prefix = $program_prefix
dependency_tracking = $dependency_tracking
prefix = $prefix
exec_prefix = $exec_prefix
bindir = $bindir
sbindir = $sbindir
sysconfdir = $sysconfdir
datadir = $datadir
includedir = $includedir
libdir = $libdir
libexecdir = $libexecdir
localstatedir = $localstatedir
sharedstatedir = $sharedstatedir
mandir = $mandir
infodir = $infodir
EOF

echo "Configuration complete."
echo "  Build: $build"
echo "  Host: $host"
echo "  Prefix: $prefix"
echo "  Bindir: $bindir"