#! /usr/bin/env sh

# FediStatusPoster - Simple CLI tools and scripts to post to the fediverse
# Copyright (C) 2024 <@Anon@yandere.cc> 
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

# Requires:
#   curl
#   jq

# Get the runtime path of the bot
ABS_PATH="$(readlink -f "$0")"
RUN_DIR="$(dirname "$ABS_PATH")"
ENTRY="${RUN_DIR}/../FediStatusPoster/runconfig.sh"

# DEFAULT_CREDENTIALS="${RUN_DIR}/credentials/hentaibot.sh.gpg"
# DEFAULT_KEYFILE="/zfs_media/fs1/BotKeys/hentaibot.sh.key"
BOORU_URL="gelbooru.com"
BLACKLIST_HISTORY=50
POS_ARGS=8

[ ! $# -ge $POS_ARGS ] &&\
	echo "Invalid number of arguments..." &&\
	echo "$(basename "$0") [default_credentials] [default_keyfile] [blacklist] [md5_history] [md5_tail_history] [searchtags] [msg_sfw] [msg_nsfw] usage:" &&\
	echo "  default_credentials - Path to the credentials file generated by create_app.py" &&\
	echo "  default_keyfile - Path to the keyfile if encryption was used for credentials" &&\
	echo "  blacklist - A text list of newline deliminated tags to blacklist" &&\
	echo "  md5_history - md5 history file to write to in order to avoid excessive duplicates" &&\
	echo "  md5_tail_history - the number of history items to blacklist" &&\
	echo "  md5_blacklist - A permanent blacklist file" &&\
	echo "  searchtags - The tags to search for" &&\
	echo "  msg_sfw - Display message if image is safe for work" &&\
	echo "  msg_nsfw - Display message if image is not safe for work" &&\
	exit 1

DEFAULT_CREDENTIALS="$1"
DEFAULT_KEYFILE="$2"
TAGS_BLACKLIST="$3"
MD5_HISTORY="$4"
MD5_NUM="$5"
MD5_BLACKLIST="$6"
TAGS="$7"
MSG_SFW="$8"
MSG_NSFW="$9"
shift $POS_ARGS

TMP=$(mktemp)
tail -n "$MD5_NUM" "$MD5_HISTORY" > "$TMP"
trap "rm ${TMP}" EXIT

TAGS_FMT=`echo "$TAGS" | tr ' ' '\n' | xargs echo | tr ' ' '+'`
TAGS_BLK_FMT=`xargs -a "$TAGS_BLACKLIST" echo | sed 's|\ |+-|g'`
TAGS_SEARCH="${TAGS_FMT}+sort:random+-${TAGS_BLK_FMT}"
URL="https://${BOORU_URL}/index.php"
DATA_POST="page=dapi&s=post&q=index&json=1&tags=${TAGS_SEARCH}"

# RESULT=`curl -s --get "https://${BOORU_URL}/index.php" -d "page=dapi&s=post&q=index&json=1&limit=1&tags=${TAGS_SEARCH}"`
RESULT=`curl -L -s --get "${URL}" -d "${DATA_POST}"`
[ -z "$RESULT" ] && echo "Empty response for ${TAGS_SEARCH}" && exit 1
LENGTH="$(echo "$RESULT" | jq -r '. | .post | length')"
[ "$LENGTH" = 0 ] && echo "Zero length for ${TAGS_SEARCH}" && exit 1

LAST_INDEX=`expr $LENGTH - 1`
SELECTION=`seq 0 $LAST_INDEX | shuf`

for i in $SELECTION;do
	MD5="$(echo "$RESULT" | jq -r '. | .post['"$i"'].md5')"
	[ -z "$MD5" ] && continue
	grep -q "$MD5" "$TMP" && continue
	grep -q "$MD5" "$MD5_BLACKLIST" && continue
	URL_FILE="$(echo "$RESULT" | jq -r '. | .post['"$i"'].file_url')"
	RATING="$(echo "$RESULT" | jq -r '. | .post['"$i"'].rating')"

	NSFW="--nsfw"
	TEXT="$MSG_NSFW"
	
	PICKED="/tmp/$(basename "$URL_FILE")"

	# Always delete the temporary file
	trap "rm ${PICKED} ${TMP}" EXIT
	
	sleep 1
	curl -L -s "$URL_FILE" -o "$PICKED"
	
	[ "$RATING" = "general" ] && NSFW="--safe" && TEXT="$MSG_SFW"
	[ "$RATING" = "sensitive" ] && NSFW="--safe" && TEXT="$MSG_SFW"
	
	[ ! -f "$PICKED" ] && echo "Failed to download: ${URL_FILE} to ${PICKED}" && continue
	
	case "$(file --mime-type "$PICKED")" in
		*': image/'*) ;;
		*': video/'*) ;;
		*)
			rm "$PICKED" && continue
			;;
	esac
	echo "$MD5" >> "$MD5_HISTORY"
	"$ENTRY" "$DEFAULT_CREDENTIALS" "$DEFAULT_KEYFILE" "$NSFW" "$@" "$TEXT" "$PICKED"
	exit 0
done
echo "Exited 1 for ${TAGS_SEARCH}"
exit 1