#!/bin/sh
# kjv: Read the Word of God from your terminal
# License: Public domain

SELF="$0"

get_data() {
	sed '1,/^#EOF$/d' < "$SELF" | tar xz -O "$1"
}

if [ -z "$PAGER" ]; then
	if command -v less >/dev/null; then
		PAGER="less"
	else
		PAGER="cat"
	fi
fi

show_help() {
	exec >&2
	echo "usage: $(basename "$0") [flags] <references...>"
	echo
	echo "  -l      list books"
	echo "  -W      no line wrap"
	echo "  -h      show help"
	echo
	echo "  References types:"
	echo "      <Book>"
	echo "          Individual book"
	echo "      <Book>:<Chapter>"
	echo "          Individual chapter of a book"
	echo "      <Book>:<Chapter>:<Verse>[,<Verse>]..."
	echo "          Individual verse(s) of a specific chapter of a book"
	echo "      <Book>:<Chapter>-<Chapter>"
	echo "          Range of chapters in a book"
	echo "      <Book>:<Chapter>:<Verse>-<Verse>"
	echo "          Range of verses in a book chapter"
	echo "      <Book>:<Chapter>:<Verse>-<Chapter>:<Verse>"
	echo "          Range of chapters and verses in a book"
	echo
	echo "      /<Search>"
	echo "          All verses that match a pattern"
	echo "      <Book>/<Search>"
	echo "          All verses in a book that match a pattern"
	echo "      <Book>:<Chapter>/<Search>"
	echo "          All verses in a chapter of a book that match a pattern"
	exit 2
}

while [ $# -gt 0 ]; do
	isFlag=0
	firstChar="${1%"${1#?}"}"
	if [ "$firstChar" = "-" ]; then
		isFlag=1
	fi

	if [ "$1" = "--" ]; then
		shift
		break
	elif [ "$1" = "-l" ]; then
		# List all book names with their abbreviations
		get_data kjv.tsv | awk -v cmd=list "$(get_data kjv.awk)"
		exit
	elif [ "$1" = "-W" ]; then
		export KJV_NOLINEWRAP=1
		shift
	elif [ "$1" = "-h" ] || [ "$isFlag" -eq 1 ]; then
		show_help
	else
		break
	fi
done

if [ $# -eq 0 ]; then
	show_help
fi

startIdx=$#
(while [ $# -gt 0 ]; do
	if [ "${startIdx}" -ne $# ]; then
		echo
	fi
	get_data kjv.tsv | awk -v cmd=ref -v ref="$1" "$(get_data kjv.awk)"
	shift
done ) | ${PAGER}