#!/usr/bin/env bash

if [ ! -f temp/all_resolved.csv ]
then
    echo "Run ./resolve_subdomains.sh first!"
    exit 1
fi

# Gather all the rules for filtering
echo "Compiling rules..." > /dev/stderr
cat rules_adblock/*.txt | grep -v '^!' | grep -v '^\[Adblock' | sort -u > temp/all_rules_adblock.txt
./adblock_to_domain_list.py --input temp/all_rules_adblock.txt --output rules/from_adblock.cache.list
cat rules_hosts/*.txt | grep -v '^#' | grep -v '^$' | cut -d ' ' -f2 > rules/from_hosts.cache.list
cat rules/*.list | grep -v '^#' | grep -v '^$' | sort -u > temp/all_rules_multi.list
cat rules/first-party.list | grep -v '^#' | grep -v '^$' | sort -u > temp/all_rules_first.list

echo "Filtering first-party tracking domains..." > /dev/stderr
./filter_subdomains.py --rules temp/all_rules_first.list --input temp/all_resolved_sorted.csv --output temp/firstparty-trackers.list
sort -u temp/firstparty-trackers.list > dist/firstparty-trackers.txt

echo "Filtering first-party curated tracking domains..." > /dev/stderr
./filter_subdomains.py --rules temp/all_rules_first.list --input temp/all_resolved_sorted.csv --no-explicit --output temp/firstparty-only-trackers.list
sort -u temp/firstparty-only-trackers.list > dist/firstparty-only-trackers.txt

echo "Filtering multi-party tracking domains..." > /dev/stderr
./filter_subdomains.py --rules temp/all_rules_multi.list --input temp/all_resolved_sorted.csv --output temp/multiparty-trackers.list
sort -u temp/multiparty-trackers.list > dist/multiparty-trackers.txt

echo "Filtering multi-party curated tracking domains..." > /dev/stderr
./filter_subdomains.py --rules temp/all_rules_multi.list --input temp/all_resolved_sorted.csv --no-explicit --output temp/multiparty-only-trackers.list
sort -u temp/multiparty-only-trackers.list > dist/multiparty-only-trackers.txt

# Format the blocklist so it can be used as a hostlist
function generate_hosts {
    basename="$1"
    description="$2"
    description2="$3"

    (
        echo "# First-party trackers host list"
        echo "# $description"
        echo "# $description2"
        echo "#"
        echo "# About first-party trackers: https://git.frogeye.fr/geoffrey/eulaurarien#whats-a-first-party-tracker"
        echo "# Source code: https://git.frogeye.fr/geoffrey/eulaurarien"
        echo "#"
        echo "# In case of false positives/negatives, or any other question,"
        echo "# contact me the way you like: https://geoffrey.frogeye.fr"
        echo "#"
        echo "# Latest version:"
        echo "# - First-party trackers  : https://hostfiles.frogeye.fr/firstparty-trackers-hosts.txt"
        echo "# - … excluding redirected: https://hostfiles.frogeye.fr/firstparty-only-trackers-hosts.txt"
        echo "# - First and third party : https://hostfiles.frogeye.fr/multiparty-trackers-hosts.txt"
        echo "# - … excluding redirected: https://hostfiles.frogeye.fr/multiparty-only-trackers-hosts.txt"
        echo "#"
        echo "# Generation date: $(date -Isec)"
        echo "# Generation software: eulaurarien $(git describe --tags)"
        echo "# Number of source websites: $(wc -l temp/all_websites.list | cut -d' ' -f1)"
        echo "# Number of source subdomains: $(wc -l temp/all_subdomains.list | cut -d' ' -f1)"
        echo "#"
        echo "# Number of known first-party trackers: $(wc -l temp/all_rules_first.list | cut -d' ' -f1)"
        echo "# Number of first-party subdomains: $(wc -l dist/firstparty-trackers.txt | cut -d' ' -f1)"
        echo "# … excluding redirected: $(wc -l dist/firstparty-only-trackers.txt | cut -d' ' -f1)"
        echo "#"
        echo "# Number of known multi-party trackers: $(wc -l temp/all_rules_multi.list | cut -d' ' -f1)"
        echo "# Number of multi-party subdomains: $(wc -l dist/multiparty-trackers.txt | cut -d' ' -f1)"
        echo "# … excluding redirected: $(wc -l dist/multiparty-only-trackers.txt | cut -d' ' -f1)"
        echo
        cat "dist/$basename.txt" | while read host;
        do
            echo "0.0.0.0 $host"
        done
    ) > "dist/$basename-hosts.txt"
}

generate_hosts "firstparty-trackers" "Generated from a curated list of first-party trackers" ""
generate_hosts "firstparty-only-trackers" "Generated from a curated list of first-party trackers" "Only contain the first chain of redirection."
generate_hosts "multiparty-trackers" "Generated from known third-party trackers." "Also contains trackers used as third-party."
generate_hosts "multiparty-only-trackers" "Generated from known third-party trackers." "Do not contain trackers used in third-party. Use in combination with third-party lists."