#!/bin/sh
# Copyright 2023 MOSSDeF, Stan Grishin (stangri@melmac.ca)
# shellcheck disable=SC2015,SC3043,SC3060

readonly adbFunctionsFile='/etc/init.d/adblock-fast'
if [ -s "$adbFunctionsFile" ]; then
# shellcheck source=../../etc/init.d/adblock-fast
	. "$adbFunctionsFile"
else
	printf "%b: adblock-fast init.d file (%s) not found! \n" '\033[0;31mERROR\033[0m' "$adbFunctionsFile"
fi

# Transition from simple-adblock
_enable_url() {
	local cfg="$1" url="$2" action="$3"
	local u a
	config_get u "$cfg" 'url'
	config_get a "$cfg" 'action' 'block'
	if [ "$u" = "$url" ] && [ "$a" = "$action" ]; then
		uci_remove "$packageName" "$cfg" 'enabled' && _found=1
	fi
}

enable_add_url() {
	local url="$1" action="$2" _found
	config_load "$packageName"
	config_foreach _enable_url 'file_url' "$url" "$action"
	if [ -z "$_found" ]; then
		uci_add "$packageName" 'file_url'
		uci_set "$packageName" '@file_url[-1]' 'url' "$url"
		uci_set "$packageName" '@file_url[-1]' 'size' "$(get_url_filesize "$url")"
		uci_set "$packageName" '@file_url[-1]' 'action' "$action"
	fi
}

if [ -s '/etc/config/simple-adblock' ] \
	&& [ ! -s '/etc/config/adblock-fast-opkg' ] \
	&& [ "$(uci_get adblock-fast config enabled)" = '0' ]; then
	cp -f '/etc/config/adblock-fast' '/etc/config/adblock-fast-opkg'
	enabled="$(uci_get simple-adblock config enabled)"
	if [ -x '/etc/init.d/simple-adblock' ]; then
		output "Stopping and disabling simple-adblock "
		if /etc/init.d/simple-adblock stop  >/dev/null 2>&1 \
			&& /etc/init.d/simple-adblock disable \
			&& uci_set simple-adblock config enabled 0 \
			&& uci_commit simple-adblock; then
			output_okn
		else
			output_failn
		fi
	else
		output "Disabling simple-adblock."
		if uci_set simple-adblock config enabled 0 \
			&& uci_commit simple-adblock; then
			output_okn
		else
			output_failn
		fi
	fi
	output "Migrating simple-adblock config file "
	for i in allow_non_ascii canary_domains_icloud canary_domains_mozilla \
		compressed_cache compressed_cache_dir config_update_enabled \
		curl_additional_param curl_max_file_size curl_retry download_timeout \
		debug dns dns_instance dnsmasq_config_file_url force_dns led \
		parallel_downloads procd_trigger_wan6 procd_boot_wan_timeout verbosity; do
		j="$(uci_get simple-adblock.config.${i})"
		[ -n "$j" ] && uci_set "$packageName" config "$i" "$j"
	done
	[ -n "$enabled" ] && uci_set "$packageName" config enabled "$enabled"
	j="$(uci_get simple-adblock config config_update_url)"
	if [ "${j//simple-adblock/}" = "$j" ]; then
		uci_set "$packageName" config config_update_url "$j"
	fi
	ccd="$(uci_get simple-adblock config compressed_cache_dir '/etc')"
	for j in $(uci_get simple-adblock config allowed_domain); do
		[ -n "$j" ] && uci_add_list "$packageName" config allowed_domain "$j"
	done
	for j in $(uci_get simple-adblock config blocked_domain); do
		[ -n "$j" ] && uci_add_list "$packageName" config blocked_domain "$j"
	done
	for j in $(uci_get simple-adblock config force_dns_port); do
		[ -n "$j" ] && uci_add_list "$packageName" config force_dns_port "$j"
	done
	output_okn

	for i in allowed_domains_url blocked_adblockplus_url blocked_domains_url \
		blocked_hosts_url; do
		output "Migrating simple-adblock ${i} "
		for j in $(uci_get simple-adblock config "$i"); do
			if [ "$i" = 'allowed_domains_url' ]; then
				enable_add_url "$j" 'allow'
			else
				enable_add_url "$j" 'block'
			fi
		done
		output_okn
	done
	uci_commit "$packageName"
	output "Migrating simple-adblock cache file(s) "
	for i in '/var/run/simple-adblock/dnsmasq.addnhosts.cache' \
		'/var/run/simple-adblock/dnsmasq.conf.cache' \
		'/var/run/simple-adblock/dnsmasq.ipset.cache' \
		'/var/run/simple-adblock/dnsmasq.nftset.cache' \
		'/var/run/simple-adblock/dnsmasq.servers.cache' \
		'/var/run/simple-adblock/unbound.cache'; do
		if [ -s "$i" ]; then
			current_dir="$(dirname "$i")"
			mkdir -p "${current_dir//simple-adblock/adblock-fast}"
			mv -f "$i" "${i//simple-adblock/adblock-fast}" && output_okn || output_failn
		fi
	done
	for i in 'simple-adblock.dnsmasq.addnhosts.gz' \
		'simple-adblock.dnsmasq.conf.gz' \
		'simple-adblock.dnsmasq.ipset.gz' \
		'simple-adblock.dnsmasq.nftset.gz' \
		'simple-adblock.dnsmasq.servers.gz' \
		'simple-adblock.unbound.gz'; do
		i="${ccd}/${i}"
		if [ -s "$i" ]; then
			mkdir -p "${ccd//simple-adblock/adblock-fast}"
			mv -f "$i" "${i//simple-adblock/adblock-fast}" && output_okn || output_failn
		fi
	done
	output_okn
fi

exit 0