#!/usr/bin/env bash

# qbth - qbittorrent helper

# Dependency check
missing_deps=()
for bin in "gum" "jq" "lynx" "parallel" "qbt"; do
    if ! test -x "$(command -v $bin)"; then
        missing_deps+=("$bin")
    fi
done

if (( "${#missing_deps[@]}" != 0 )); then
    echo "Missing dependencies:" "${missing_deps[@]}"
    exit 1
fi

# Add torrent
function add_torrents() {
    torrents=("$@")

    parallel qbt torrent add url ::: "${torrents[@]}"
    for url in "${torrents[@]}"; do gum log -l info "Added" "$(basename $url)"; done
}

function delete_torrents() {
    if test -n "$1"; then
        echo "$1" | parallel "qbt torrent delete --with-files {}"
        echo "$1" | xargs -I _ gum log -l info "Deleted" _
    else
        gum log -l info "Nothing to do."
    fi
}

export -f add_torrents
export -f delete_torrents

distro_selection=$(gum choose --limit=1 --header="Available torrents" --height=13 "AlmaLinux" "Debian" "Devuan" "Fedora" "FreeBSD" "Kali Linux" "NetBSD" "NixOS" "Qubes" "Rocky Linux" "Tails")
relver=$(gum input --placeholder="Enter $distro_selection release version")
action=$(gum choose --limit=1 --header="Choose an action: Add, Delete" "Add" "Delete")

case "$distro_selection" in
    "AlmaLinux")
        case "$action" in
            "Add")
                urls=(
                    "https://almalinux-mirror.dal1.hivelocity.net/${relver}/isos/aarch64/AlmaLinux-${relver}-aarch64.torrent"
                    "https://almalinux-mirror.dal1.hivelocity.net/${relver}/isos/ppc64le/AlmaLinux-${relver}-ppc64le.torrent"
                    "https://almalinux-mirror.dal1.hivelocity.net/${relver}/isos/s390x/AlmaLinux-${relver}-s390x.torrent"
                    "https://almalinux-mirror.dal1.hivelocity.net/${relver}/isos/x86_64/AlmaLinux-${relver}-x86_64.torrent"
                )

                add_torrents "${urls[@]}"
                ;;

            "Delete")
                torrent_hashes=$(qbt torrent list -F csv | awk -v pat="AlmaLinux-$relver" -F, '$0~pat{print $1}')
                delete_torrents "$torrent_hashes"
                ;;
        esac
        ;;

    "Debian")
        case "$action" in
            "Add")
                urls=(
                    "https://cdimage.debian.org/debian-cd/current/amd64/bt-dvd/debian-${relver}-amd64-DVD-1.iso.torrent"
                    "https://cdimage.debian.org/debian-cd/current/arm64/bt-dvd/debian-${relver}-arm64-DVD-1.iso.torrent"
                    "https://cdimage.debian.org/debian-cd/current/armel/bt-dvd/debian-${relver}-armel-DVD-1.iso.torrent"
                    "https://cdimage.debian.org/debian-cd/current/armhf/bt-dvd/debian-${relver}-armhf-DVD-1.iso.torrent"
                    "https://cdimage.debian.org/debian-cd/current/mips64el/bt-dvd/debian-${relver}-mips64el-DVD-1.iso.torrent"
                    "https://cdimage.debian.org/debian-cd/current/mipsel/bt-dvd/debian-${relver}-mipsel-DVD-1.iso.torrent"
                    "https://cdimage.debian.org/debian-cd/current/ppc64el/bt-dvd/debian-${relver}-ppc64el-DVD-1.iso.torrent"
                    "https://cdimage.debian.org/debian-cd/current/s390x/bt-dvd/debian-${relver}-s390x-DVD-1.iso.torrent"
                )

                add_torrents "${urls[@]}"
                ;;

            "Delete")
                torrent_hashes=$(qbt torrent list -F csv | awk -v pat="debian-$relver" -F, '$0~pat{print $1}')
                delete_torrents "$torrent_hashes"
                ;;
        esac
        ;;

    "Devuan")
        case "$action" in
            "Add")
                urls=("https://files.devuan.org/devuan_${relver}.torrent")
                add_torrents "${urls[@]}"
                ;;

            "Delete")
                torrent_hash=$(qbt torrent list -F csv | awk -v pat="devuan_$relver" -F, '$0~pat{print $1}')
                delete_torrents "$torrent_hash"
                ;;
        esac
        ;;

    "Fedora")
        case "$action" in
            "Add")
                mapfile -t urls < <(lynx -dump -listonly=on -nonumbers "https://torrent.fedoraproject.org/" | grep "${relver}.torrent")
                add_torrents "${urls[@]}"
                ;;

            "Delete")
                torrent_hashes=$(qbt torrent list -F json | jq '.[] | select(.name | startswith("Fedora") and endswith("$relver")) | .hash' | tr -d '"')
                delete_torrents "$torrent_hashes"
                ;;
        esac
        ;;

    "FreeBSD")
        case "$action" in
            "Add")
                mapfile -t urls < <(curl -sSL "https://people.freebsd.org/~jmg/FreeBSD-${relver}-R-magnet.txt" | grep "magnet:")
                add_torrents "${urls[@]}"
                ;;

            "Delete")
                torrent_hashes=$(qbt torrent list -F csv | awk -v pat="FreeBSD-$relver" -F, '$0~pat{print $1}')
                delete_torrents "$torrent_hashes"
                ;;
        esac
        ;;

    "Kali Linux")
        case "$action" in
            "Add")
                mapfile -t urls < <(lynx -dump -listonly=on -nonumbers https://kali.download/base-images/current/ | grep ".torrent")
                add_torrents "${urls[@]}"
                ;;

            "Delete")
                torrent_hashes=$(qbt torrent list -F json | jq '.[] | select(.name | contains("kali")) | .hash' | tr -d '"')
                delete_torrents "$torrent_hashes"
                ;;
        esac
        ;;

    "NetBSD")
        case "$action" in
            "Add")
                mapfile -t urls < <(lynx -dump -listonly=on -nonumbers "https://cdn.netbsd.org/pub/NetBSD/NetBSD-${relver}/images/" | grep ".torrent")
                add_torrents "${urls[@]}"
                ;;

            "Delete")
                torrent_hashes=$(qbt torrent list -F csv | awk -v pat="NetBSD-$relver" -F, '$0~pat{print $1}')
                delete_torrents "$torrent_hashes"
                ;;
        esac
        ;;

    "NixOS")
        case "$action" in
            "Add")
                mapfile -t urls < <(curl -sSL https://api.github.com/repos/AnimMouse/NixOS-ISO-Torrents/releases/latest | jq '.assets[].browser_download_url' | tr -d '"')
                add_torrents "${urls[@]}"
                ;;

            "Delete")
                torrent_hashes=$(qbt torrent list -F json | jq '.[] | select(.name | contains("nixos")) | .hash' | tr -d '"')
                delete_torrents "$torrent_hashes"
                ;;
        esac
        ;;

    "Qubes")
        case "$action" in
            "Add")
                urls=("https://mirrors.edge.kernel.org/qubes/iso/Qubes-R${relver}-x86_64.torrent")
                add_torrents "${urls[@]}"
                ;;

            "Delete")
                torrent_hash=$(qbt torrent list -F csv | awk -v pat="Qubes-R$relver" -F, '$0~pat{print $1}')
                delete_torrents "$torrent_hash"
                ;;
        esac
        ;;

    "Rocky Linux")
        case "$action" in
            "Add")
                urls=(
                    "https://download.rockylinux.org/pub/rocky/${relver}/isos/aarch64/Rocky-${relver}-aarch64-dvd.torrent"
                    "https://download.rockylinux.org/pub/rocky/${relver}/isos/ppc64le/Rocky-${relver}-ppc64le-dvd.torrent"
                    "https://download.rockylinux.org/pub/rocky/${relver}/isos/s390x/Rocky-${relver}-s390x-dvd.torrent"
                    "https://download.rockylinux.org/pub/rocky/${relver}/isos/x86_64/Rocky-${relver}-x86_64-dvd.torrent"
                )

                add_torrents "${urls[@]}"
                ;;

            "Delete")
                torrent_hashes=$(qbt torrent list -F csv | awk -v pat="Rocky-$relver" -F, '$0~pat{print $1}')
                delete_torrents "$torrent_hashes"
                ;;
        esac
        ;;

    "Tails")
        case "$action" in
            "Add")
                urls=(
                    "https://tails.net/torrents/files/tails-amd64-${relver}.img.torrent"
                    "https://tails.net/torrents/files/tails-amd64-${relver}.iso.torrent"
                )

                add_torrents "${urls[@]}"
                ;;

            "Delete")
                torrent_hashes=$(qbt torrent list -F json | jq '.[] | select(.name | contains("tails")) | .hash' | tr -d '"')
                delete_torrents "$torrent_hashes"
                ;;
        esac
        ;;
esac