#! /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/>.

[ ! $# -ge 2 ] &&\
	echo "Invalid number of arguments..." &&\
	echo "$(basename "$0") [master_file] [log_file] usage:" &&\
	echo "  master_file - path to the master file" &&\
	echo "  log_file - path to the log file" &&\
	exit 1

# Get the runtime path of the bot
ABS_PATH="$(readlink -f "$0")"
RUN_DIR="$(dirname "$ABS_PATH")"

MASTER_FILE="$1"
LOG_FILE="$2"
INDEX=1

[ ! -f "$MASTER_FILE" ] && echo "Could not find: ${MASTER_FILE}" && exit 1
[ ! -s "$MASTER_FILE" ] && echo "File is empty: ${MASTER_FILE}" && exit 1

NLINES="$(wc -l "$MASTER_FILE" | cut -d ' ' -f1)"
if [ -s "$LOG_FILE" ];then
	INDEX="$(grep ".*Index: [0-9]*$" "$LOG_FILE" | tail -n 1 | grep -o "[0-9]*$")"
	INDEX="$(expr "$INDEX" '%' "$NLINES" '+' '1')"
fi
PICKED="$(sed "${INDEX}q;d" "$MASTER_FILE")"

echo "$(date +'%F %T') | Picked: ${PICKED} | Index: ${INDEX}" >> "$LOG_FILE"
echo "$PICKED"