#!/usr/bin/env bash
# Usage: {script} RULE_FILENAME
# Update list of TLD

set -euo pipefail

declare -r IFS=$'\n'

declare -r LIST_URL="https://publicsuffix.org/list/public_suffix_list.dat"
declare -r LIST_FILENAME=$(mktemp)

declare -r RULE_FILENAME_TEMPORARY=$(mktemp)

echo "- Downloading list"
curl --silent --location "${LIST_URL}" --output  "${LIST_FILENAME}"

echo "- Removing old data"
rm -Rf data/domain/*
mkdir -p data/domain/public-suffix

parse_tlds_list () {
    sed '/^\/\/*/d' |
    idn2 |
    tr '[:lower:]' '[:upper:]' |
    sed '/^$/d' | while read -r suffix
    do
        suffix="${suffix#\*\.}"
        suffix="${suffix#\!}"
        tld="${suffix##*\.}"
        if test "$tld" != "$suffix"
        then
            prefix="${suffix%.$tld}"
            echo "$tld $prefix"
        else
            prefix=""
        fi
    done
}

echo "- Creating files"

cat "$LIST_FILENAME" |
    parse_tlds_list | 
    cut -d" " -f1 |
    sort -u | while read -r tld_with_suffix
    do
        suffixlist="$(cat "$LIST_FILENAME" | while read -r line
            do
                if test "// ===END ICANN DOMAINS===" = "$line"
                then break
                else echo "$line"
                fi
            done |
            parse_tlds_list |
            grep "^$tld_with_suffix " |
            cut -d" " -f2 |
            tr '[:lower:]' '[:upper:]' |
            LC_ALL=C sort | while read -r suffix
            do
                echo "    '$suffix.$tld_with_suffix',"
            done | LC_ALL=C sort || :)"

        if test -n "$suffixlist"
        then
            echo "- Creating public-suffix/$tld_with_suffix.php"
            echo "<?php declare(strict_types=1);
// Copyright (c) https://publicsuffix.org
// SPDX-License-Identifier: MPL-2.0-no-copyleft-exception
return [
$suffixlist
];" > "data/domain/public-suffix/$tld_with_suffix.php"
        else
            echo "- Skipping public-suffix/$tld_with_suffix.php"
        fi
    done

wait

echo "Finished!"