#!/bin/bash

set -eu
set -o pipefail

mode=""

function usage
{
    retval="$1"
    case "$retval" in
        0)
            ;;
        *)
            exec 1>&2
            ;;
    esac
    echo "Usage: $0 --rm-commands --regex --egrep"
    echo
    echo "Be sure to --regex or --egrep before rm'ing with --rm-commands"
    exit "$retval"
}

while [ "$#" -ge 1 ]
do
    case "$1" in
        --rm-commands)
            mode=rm-commands
            ;;
        --regex)
            mode=regex
            ;;
        --egrep)
            mode=egrep
            ;;
        -h|--help)
            usage 0
            ;;
        *)
            echo "$0: Unrecognized option: $1" 1>&2
            usage 1
            ;;
    esac
    shift
done

case "$mode" in
    rm-commands) ;;
    regex) ;;
    egrep) ;;
    "")
        echo "$0: You must specify --rm-commands, --regex or --egrep" 1>&2
        usage 1
        ;;
    *)
        echo "$0: Internal error: \$mode has a strange value: $mode" 1>&2
        exit 1
        ;;
esac

function post_process
{
    case "$mode" in
        rm-commands)
            sed \
                -e 's#^#rm -rf '"'"'./#' \
                -e 's#$#'"'"'#'
            ;;
        regex)
            sed \
                -e 's#^avconv-Music/#/#' \
                -e 's#\.mp3$#.#' \
                -e 's#\.#\\.#g' \
                -e 's#^#r'"'"'#' \
                -e 's#$#'"'"', #'
            ;;
        egrep)
            sed \
                -e 's#^avconv-Music/#/#' \
                -e 's#\.mp3$#.#' \
                -e 's#\.#\\.#g' \
                -e 's#^#| egrep -v '"'"'#' \
                -e 's#$#'"'"' \\#'
            ;;
        *)
            echo "$0: Internal error: \$mode has a strange value: $mode" 1>&2
            exit 1
    esac
}

# The egrep -v's are a list of tracks I want to keep, even though they have iffy filenames
case "$mode" in
    egrep)
        (
            echo 'This is to be a list of tracks to eliminate.'
            echo 'If something appears here that should be kept, paste it into the big egrep chain'
        ) | fmt | sed 's/^/# /'
        ;;
    regex) ;;
    rm-commands) ;;
    *)
        echo "$0: Internal error: \$mode had a bad value: $mode (2)" 1>&2
        exit 1
esac

find avconv-Music -print \
    | egrep -i 'god|jehova|heaven|lord|jesus|christ|pray|satan|devil|angel|crucif|retard|blood|torture|torturing' \
    | sort \
    | egrep -v '/Al Stewart/Year of the Cat/01 - Lord Grenville\.' \
    | egrep -v '/Billy Joel/Streetlife Seranade/02.Los Angelenos\.' \
    | egrep -v '/Blue Oyster Cult/Spectres/Blue Oyster Cult -Spectres -01 -Godzilla\.' \
    | egrep -v '/Bob Dylan/Mtv Unplugged/11 With God On Our Side\.' \
    | egrep -v '/Christopher Cross' \
    | egrep -v '/Duran Duran/Paper Gods' \
    | egrep -v '/Elton John/Grab Bag/_Disc 2_ 07 - If There_s A God In Heaven _What_s He Waiting For__\.' \
    | egrep -v '/Enya/shepherd_moons/angeles.' \
    | egrep -v '/Foreigner/Complete Greatest Hits/05-foreigner-hot_blooded-apc\.' \
    | egrep -v '/Gary Numan/Savage _Songs From A Broken World_/08\.What God Intended\.' \
    | egrep -v '/Gary Numan/Savage _Songs From A Broken World_/09\.Pray For The Pain You Serve\.' \
    | egrep -v '/Icicle Works/The Best Of The Icicle Works/08\.Evangeline\.' \
    | egrep -v '/Iris DeMent/Infamous Angel' \
    | egrep -v '/Jack Bruce, Bill Lordan and Robin Trower' \
    | egrep -v '/Joe Satriani/Surfing With The Alien/08 - Lords Of Karma _Album Version_\.' \
    | egrep -v '/Kinks/The Essential Kinks CD2/11\.Father Christmas\.' \
    | egrep -v '/Marillion/Misplaced Childhood CD1/1-07 Lords Of The Backstage.' \
    | egrep -v '/Memories Lab/Stronger Than Hate/05 - Tears and Blood\.' \
    | egrep -v '/Metallica/Metallica _Remastered 2007_/10\.The God That Failed\.' \
    | egrep -v '/Oceansize/2007-Frames/06-oceansize-an_old_friend_of_christys\.' \
    | egrep -v '/Prince/The B-Sides/17 - Another Lonely Christmas _feat\. Prince and the Revolution_\.' \
    | egrep -v '/Racer X/Technical Difficulties/11\.God Of The Sun\.' \
    | egrep -v '/Rickie Lee Jones/Rickie Lee Jones/04-Young Blood\.' \
    | egrep -v '/Roger Waters/Amused to Death/02 - What God Wants, Part I\.' \
    | egrep -v '/Roger Waters/Amused to Death/09 - What God Wants, Part II\.' \
    | egrep -v '/Roger Waters/Amused to Death/10 - What God Wants, Part III\.' \
    | egrep -v '/Rush/2007-Snakes and Arrows/03 - Workin_ Them Angels\.' \
    | egrep -v '/Rush/2012-Clockwork Angels' \
    | egrep -v '/Rush/Live-Snakes and Arrows Live D1/13 - Workin_ Them Angels\.' \
    | egrep -v '/Sieges Even/Paramount/09 - Mounting Castles In The Blood Red Sky\.' \
    | egrep -v '/Styx/Pieces Of Eight _Vinyl_/05.Lords Of The Ring.' \
    | egrep -v '/Supertramp/Crime of the Century/02\.Bloody Well Right\.' \
    | egrep -v '/Suzanne Vega/99\.9 Fo/02 - Blood Makes Noise\.' \
    | egrep -v '/Suzanne Vega/99\.9 Fo/05 - Blood Sings\.' \
    | egrep -v '/Tanita Tikaram/Lovers In The City/02 - Bloodlines\.' \
    | egrep -v '/The Cure/Greatest Hits CD1/21\.Just Like Heaven\.' \
    | egrep -v '/The Disposable Heroes of Hiphoprisy/Hypocrisy Is the Greatest Luxury/01 - Satanic Reverses.' \
    | egrep -v '/Thought Chamber/Angular Perceptions/07 - Gods Of Oblique.' \
    | egrep -v '/Tori Amos/Boys for Pele/02 - Blood Roses' \
    | egrep -v '/U2/The Best of 1980-1990 and B-Sides _disc 1 - The Best Of_/05 - Sunday Bloody Sunday\.' \
    | egrep -v '/U2/Under a Blood Red Sky/' \
    | egrep -v '/U2/Under a Blood Red Sky\>' \
    | egrep -v '/XTC/Fossil Fuel' \
    | post_process \
    || true