#! /bin/bash

# Do some prep work
command -v jq >/dev/null 2>&1 || {
	echo >&2 "We require jq for this script to run, but it's not installed.  Aborting."
	exit 1
}
command -v sha1sum >/dev/null 2>&1 || {
	echo >&2 "We require sha1sum for this script to run, but it's not installed.  Aborting."
	exit 1
}
command -v git >/dev/null 2>&1 || {
	echo >&2 "We require git for this script to run, but it's not installed.  Aborting."
	exit 1
}
command -v whiptail >/dev/null 2>&1 || {
	echo >&2 "We require whiptail for this script to run, but it's not installed.  Aborting."
	exit 1
}
command -v python3 >/dev/null 2>&1 || {
	echo >&2 "We require python3 for this script to run, but it's not installed.  Aborting."
	exit 1
}

# get start time
START_BUILD=$(date +"%s")
# use UTC+00:00 time also called zulu
START_DATE=$(TZ=":ZULU" date +"%m/%d/%Y @ %R (UTC)")
# main project Header
HEADER_TITLE="getBible JSON API.v2"

# main function ˘Ô≈ôﺣ
function main() {
	# Only Hash existing scripture JSON files
	if (("$HASH_ONLY" == 1)); then
		# numbers
		# shellcheck disable=SC2012
		number=$(ls "${DIR_zip}" | wc -l)
		each_count=$((98 / number))
		# the hashing of all files
		hashingAll "${each_count:-1}"
		# show completion message
		completedBuildMessage
		exit
	fi
	# download Crosswire modules
	if (("$DOWNLOAD" == 1)); then
		getModules "${DIR_zip}"
	fi
	# numbers
	# shellcheck disable=SC2012
	number=$(ls "${DIR_zip}" | wc -l)
	each_count=$((98 / number))
	# prep the Scripture Main Git Folder
	prepScriptureMainGit "${DIR_api}_scripture"
	# Build Static JSON Files
	setStaticJsonFiles "${DIR_api}_scripture" "${DIR_zip}" "${each_count:-1}"
	# Remove Empty Folder & Static Files
	cleanSystem "${DIR_api}_scripture"
	# the hashing of all files
	hashingAll "${each_count:-1}"
	# finally check if we must commit and push changes
	if (("$PUSH" == 1)); then
		"${DIR_src}/moveToGithub.sh" "${DIR_api}"
	fi
	# show completion message
	completedBuildMessage

	exit 0
}

# completion message
function completedBuildMessage() {
	# set the build time
	END_BUILD=$(date +"%s")
	SECONDS_BUILD=$((END_BUILD - START_BUILD))
	# use UTC+00:00 time also called zulu
	END_DATE=$(TZ=":ZULU" date +"%m/%d/%Y @ %R (UTC)")
	# give completion message
	if (("$QUIET" == 0)); then
		whiptail --title "${HEADER_TITLE}" --separate-output --infobox "${USER^}, the ${HEADER_TITLE} build is complete!\n\n   Started: ${START_DATE}\n     Ended: ${END_DATE}\nBuild Time: ${SECONDS_BUILD} seconds" 12 77
		sleep 10
	else
		echo "${HEADER_TITLE} build on ${START_DATE} is completed in ${SECONDS_BUILD} seconds!"
	fi
}

# show the progress of all tasks
function showProgress() {
	if (("$QUIET" == 0)); then
		# little nerdy  ᒡ◯ᵔ◯ᒢ
		whiptail --title "$1" --gauge "$2" 7 77 0
	else
		# looking for a better solution... ¯\_(ツ)_/¯
		whiptail --title "$1" --gauge "$2" 7 77 0 >>/dev/null
	fi
}

# download Crosswire modules
function getModules() {
	# set local values
	local modules_path="$1"
	# we first delete the old modules
	rm -fr "${modules_path}"
	mkdir -p "${modules_path}"
	# run in github action workflow... ¯\_(ツ)_/¯
	if (("$GIT_HUB" == 1)); then
		echo "Start download of modules..."
		python3 "${DIR_src}/download.py" \
			--output_path "${modules_path}" \
			--bible_conf "${DIR_bible}"
		echo "Done downloading modules..."
	else
		# then we get the current modules
		{
			sleep 1
			echo -e "XXX\n0\nStart download of modules... \nXXX"
			sleep 1
			python3 -u "${DIR_src}/download.py" \
				--output_path "${modules_path}" \
				--bible_conf "${DIR_bible}"
			sleep 1
			echo -e "XXX\n100\nDone downloading modules... \nXXX"
			sleep 2
		} | showProgress "Get Crosswire Modules | ${HEADER_TITLE}" "Please wait while we download all modules"
	fi
}

# prep the Scripture Main Git Folder
function prepScriptureMainGit() {
	# set local values
	local scripture_path="$1"
	local pull="$PULL"
	# if git folder does not exist clone it
	if [ ! -d "${scripture_path}" ]; then
		# check if we must pull the REPO
		if (("$pull" == 1)); then
			# pull the main scripture repository
			git clone --depth 1 "${REPO_SCRIPTURE}" "${scripture_path}"
			# pull only once
			pull=0
		else
			# create the git folder (for scripture)
			mkdir -p "${scripture_path}"
		fi
	fi
	# reset the git folder on each run
	if [ -d "${scripture_path}/.git" ]; then
		# make a pull if needed still (update the git history)
		if (("$pull" == 1)); then
			# shellcheck disable=SC2164
			cd "${scripture_path}" && git pull && cd -
		fi
		mkdir -p "${scripture_path}Tmp"
		mv -f "${scripture_path}/.git" "${scripture_path}Tmp"
		[ -d "${scripture_path}/.github" ] && mv -f "${scripture_path}/.github" "${scripture_path}Tmp"
		[ -d "${scripture_path}/.gitignore" ] && mv -f "${scripture_path}/.gitignore" "${scripture_path}Tmp"

		# now we remove all the old git files (so we start clean each time in the build)
		rm -fr "${scripture_path}"
		mv -f "${scripture_path}Tmp" "${scripture_path}"
	fi
}

# moving all public hash files
function movePublicHashFiles () {
	# set local values
	local scripture_path="$1"
	local script_name="$2"
	local w_title="$3"
	local w_start_ms="$4"
	local w_end_ms="$5"
	local w_initial_ms="$6"
	local each="$7"
	# run in github action workflow... ¯\_(ツ)_/¯
	if (("$GIT_HUB" == 1)); then
		echo "$w_title | ${HEADER_TITLE}"
		echo "$w_initial_ms"
		echo "${w_start_ms}..."
		# now run the hashing
		# shellcheck disable=SC1090
		. "${DIR_src}/${script_name}.sh" "${scripture_path}" "$each" "$PULL" "${REPO_HASH}" >>/dev/null
		echo "${w_end_ms}..."
	else
		# now run the hashing
		{
			sleep 1
			echo -e "XXX\n0\n${w_start_ms}... \nXXX"
			sleep 1
			# shellcheck disable=SC1090
			. "${DIR_src}/${script_name}.sh" "${scripture_path}" "$each" "$PULL" "${REPO_HASH}"
			sleep 1
			echo -e "XXX\n100\n${w_end_ms}... \nXXX"
			sleep 1
		} | showProgress "$w_title | ${HEADER_TITLE}" "$w_initial_ms"
	fi
}

# Build Static JSON Files
function setStaticJsonFiles() {
	# set local values
	local scripture_path="$1"
	local modules_path="$2"
	local each="$3"
	local counter=0
	# run in github action workflow... ¯\_(ツ)_/¯
	if (("$GIT_HUB" == 1)); then
		echo "Start Building..."
		for filename in "${modules_path}/"*.zip; do
			# give notice
			echo "Building ${filename} static json files"
			# run script
			python3 "${DIR_src}/sword_to_json.py" \
				--source_file "${filename}" \
				--output_path "${scripture_path}" \
				--conf_dir "${DIR_conf}" \
				--bible_conf "${DIR_bible}"
			# give notice
			echo "Done building ${filename} static json files..."
		done
		echo "Done Building..."
	else
		# build the files
		{
			sleep 1
			echo -e "XXX\n0\nStart Building... \nXXX"
			sleep 1
			for filename in "${modules_path}/"*.zip; do
				# give notice
				echo -e "XXX\n${counter}\nBuilding ${filename} static json files...\nXXX"
				# add more
				next=$((counter + each))
				# run script
				python3 -u "${DIR_src}/sword_to_json.py" \
					--source_file "${filename}" \
					--output_path "${scripture_path}" \
					--counter "$counter" --next "$next" \
					--conf_dir "${DIR_conf}" \
					--bible_conf "${DIR_bible}"
				# add more
				counter="$next"
				# give notice
				echo -e "XXX\n${counter}\nDone building ${filename} static json files...\nXXX"
				sleep 1
			done
			echo -e "XXX\n100\nDone Building... \nXXX"
			sleep 1
		} | showProgress "Build Static JSON Files | ${HEADER_TITLE}" "Please wait while build the static json API"
	fi
}

# Remove Empty Folder & Static Files
function cleanSystem() {
	# set local values
	local scripture_path="$1"
	# remove all empty files
	find "${scripture_path}" -name "*.json" -type f -size -500c -delete
	# remove all empty folders
	find "${scripture_path}" -type d -empty -delete
}

# the hashing of all files
function hashingAll() {
	# set local values
	local each="$1"
	# start hashing Translations
	hashingMethod "${DIR_api}_scripture" \
		"hash_versions" \
		"Hash Versions" \
		"Start Versions Hashing" \
		"Done Hashing Versions" \
		"Please wait while we hash all versions" "$each"
	# start hashing Translations Books
	hashingMethod "${DIR_api}_scripture" \
		"hash_books" \
		"Hash Books" \
		"Start Versions Books Hashing" \
		"Done Hashing All Versions Books" \
		"Please wait while we hash all versions books" "$each"
	# start hashing Translations Books Chapters
	hashingMethod "${DIR_api}_scripture" \
		"hash_chapters" \
		"Hash Chapters" \
		"Start Versions Books Chapters Hashing" \
		"Done Hashing All Versions Books Chapters" \
		"Please wait while we hash all versions books chapters" "$each"
	# moving all public hash files into place
	movePublicHashFiles "${DIR_api}" \
		"movePublicHashFiles" \
		"Moving Public Hash" \
		"Start Moving Public Hashes" \
		"Done Moving All Public Hashes" \
		"Please wait while we move all the public hashes into place" "$each"
}

# hashing all files in the project
function hashingMethod() {
	# set local values
	local scripture_path="$1"
	local script_name="$2"
	local w_title="$3"
	local w_start_ms="$4"
	local w_end_ms="$5"
	local w_initial_ms="$6"
	local each="$7"
	# run in github action workflow... ¯\_(ツ)_/¯
	if (("$GIT_HUB" == 1)); then
		echo "$w_title | ${HEADER_TITLE}"
		echo "$w_initial_ms"
		echo "${w_start_ms}..."
		# now run the hashing
		# shellcheck disable=SC1090
		. "${DIR_src}/${script_name}.sh" "${scripture_path}" "$each" >>/dev/null
		echo "${w_end_ms}..."
	else
		# now run the hashing
		{
			sleep 1
			echo -e "XXX\n0\n${w_start_ms}... \nXXX"
			sleep 1
			# shellcheck disable=SC1090
			. "${DIR_src}/${script_name}.sh" "${scripture_path}" "$each"
			sleep 1
			echo -e "XXX\n100\n${w_end_ms}... \nXXX"
			sleep 1
		} | showProgress "$w_title | ${HEADER_TITLE}" "$w_initial_ms"
	fi
}

# set any/all default config property
function setDefaults() {
	if [ -f "$CONFIG_FILE" ]; then
		# set all defaults
		DIR_api=$(getDefault "getbible.api" "${DIR_api}")
		DIR_zip=$(getDefault "getbible.zip" "${DIR_zip}")
		DIR_bible=$(getDefault "getbible.bconf" "${DIR_bible}")
		DOWNLOAD=$(getDefault "getbible.download" "$DOWNLOAD")
		REPO_SCRIPTURE=$(getDefault "getbible.repo-scripture" "${REPO_SCRIPTURE}")
		REPO_HASH=$(getDefault "getbible.repo-hash" "${REPO_HASH}")
		PUSH=$(getDefault "getbible.push" "$PUSH")
		PULL=$(getDefault "getbible.pull" "$PULL")
		HASH_ONLY=$(getDefault "getbible.hashonly" "$HASH_ONLY")
		GIT_HUB=$(getDefault "getbible.github" "$GIT_HUB")
		QUIET=$(getDefault "getbible.quiet" "$QUIET")
	fi
}

# get default properties from config file
function getDefault() {
	PROP_KEY="$1"
	# shellcheck disable=SC2002
	PROP_VALUE=$(cat "$CONFIG_FILE" | grep "$PROP_KEY" | cut -d'=' -f2)
	echo "${PROP_VALUE:-$2}"
}

# help message ʕ•ᴥ•ʔ
function show_help() {
	cat <<EOF
Usage: ${0##*/:-} [OPTION...]

You are able to change a few default behaviours in the getBible API builder
  ------ Passing no command options will fallback on the defaults -------

	Options
	======================================================
   --api=<path>
	set the API target folders full path
		- target folders will be created using this path

	example: ${0##*/:-} --api=/home/$USER/v2

	two folders will be created:
		- /home/$USER/v2
		- /home/$USER/v2_scripture

	defaults:
		- repo/v2
		- repo/v2_scripture

	(these are the target folders)
	======================================================
   --bconf=<path>
	set the path to the Bible config file
		- This file contains the list of Crosswire
		  Bible Modules that will be used to build
		  the JSON API files

	example: ${0##*/:-} --bconf=/home/$USER/getbible.json

	defaults:
		- repo/conf/CrosswireModulesMap.json
	======================================================
   --conf=<path>
	set all the config properties with a file

	example: ${0##*/:-} --conf=/home/$USER/.config/getbible.conf

	defaults:
		- repo/conf/.config
	======================================================
   --pull
	clone and/or pull target folders/repositories

	example: ${0##*/:-} --pull
	======================================================
   --push
	push changes to github (only if there are changes)
		- setup the target folders (see target folders)
		- linked them to github (your own repos)
		- must be able to push (ssh authentication needed)

	REMEMBER THE AGREEMENT (README.md)

	example: ${0##*/:-} --push
	======================================================
   --zip=<path>
	set the ZIP target folder full path for the Crosswire Modules

	example: ${0##*/:-} --zip=/home/$USER/sword_zip

	defaults:
		- repo/sword_zip
	======================================================
   -d
	Do not download all Crosswire Modules (helpful in testing)
	Only use this if you already have modules.

	example: ${0##*/:-} -d
	======================================================
   --hashonly
	To only hash the existing JSON scripture files

	example: ${0##*/:-} --hashonly
	======================================================
   --github
	Trigger github workflow behaviour

	example: ${0##*/:-} --github
	======================================================
   --test
	Run a test with only three Bibles

	example: ${0##*/:-} --test
	======================================================
   --dry
	To show all defaults, and not run the build

	example: ${0##*/:-} --dry
	======================================================
   -q|--quiet
	Quiet mode that prevent whiptail from showing progress

	example: ${0##*/:-} -q
	example: ${0##*/:-} --quiet
	======================================================
   -h|--help
	display this help menu

	example: ${0##*/:-} -h
	example: ${0##*/:-} --help
	======================================================
			${HEADER_TITLE}
	======================================================
EOF
}

# get script path
DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# the target repos
REPO_SCRIPTURE="" # must be a private REPO (please)
REPO_HASH="git@github.com:getbible/v2.git"
# set working paths
DIR_src="${DIR}/src"
DIR_conf="${DIR}/conf"
DIR_api="${DIR}/v2"
DIR_zip="${DIR}/sword_zip"
# set Bible config file path
DIR_bible="${DIR_conf}/CrosswireModulesMap.json"
# set default config path
CONFIG_FILE="${DIR}/conf/.config"
# download all modules
DOWNLOAD=1
# clone and/or pull target repositories
PULL=0
# push changes to github if repos connected, and has changes
PUSH=0
# show values do not run
DRY_RUN=0
# only hash the scriptures
HASH_ONLY=0
# kill all messages
QUIET=0
# trigger github workflow behaviour
GIT_HUB=0

# check if we have options
while :; do
	case $1 in
	-h | --help)
		show_help # Display a usage synopsis.
		exit
		;;
	-q | --quiet)
		QUIET=1
		;;
	-d)
		DOWNLOAD=0
		;;
	--hashonly)
		HASH_ONLY=1
		;;
	--test)
		# setup the test environment
		DIR_bible="${DIR_conf}/CrosswireModulesMapTest.json"
		DIR_api="${DIR}/v2t"
		DIR_zip="${DIR}/sword_zipt"
		;;
	--dry)
		DRY_RUN=1
		;;
	--github)
		# github actions workflow behaviour... ¯\_(ツ)_/¯
		GIT_HUB=1
		QUIET=1
		;;
	--pull)
		PULL=1
		;;
	--push)
		PUSH=1
		;;
	--bconf) # Takes an option argument; ensure it has been specified.
		if [ "$2" ]; then
			DIR_bible=$2
			shift
		else
			echo 'ERROR: "--bconf" requires a non-empty option argument.'
			exit 1
		fi
		;;
	--bconf=?*)
		DIR_bible=${1#*=} # Delete everything up to "=" and assign the remainder.
		;;
	--bconf=) # Handle the case of an empty --bconf=
		echo 'ERROR: "--bconf" requires a non-empty option argument.'
		exit 1
		;;
	--repo-hash) # Takes an option argument; ensure it has been specified.
		if [ "$2" ]; then
			REPO_HASH=$2
			shift
		else
			echo 'ERROR: "--repo-hash" requires a non-empty option argument.'
			exit 1
		fi
		;;
	--repo-hash=?*)
		REPO_HASH=${1#*=} # Delete everything up to "=" and assign the remainder.
		;;
	--repo-hash=) # Handle the case of an empty --repo-hash=
		echo 'ERROR: "--repo-hash" requires a non-empty option argument.'
		exit 1
		;;
	--repo-scripture) # Takes an option argument; ensure it has been specified.
		if [ "$2" ]; then
			REPO_SCRIPTURE=$2
			shift
		else
			echo 'ERROR: "--repo-scripture" requires a non-empty option argument.'
			exit 1
		fi
		;;
	--repo-scripture=?*)
		REPO_SCRIPTURE=${1#*=} # Delete everything up to "=" and assign the remainder.
		;;
	--repo-scripture=) # Handle the case of an empty --repo-scripture=
		echo 'ERROR: "--repo-scripture" requires a non-empty option argument.'
		exit 1
		;;
	--conf) # Takes an option argument; ensure it has been specified.
		if [ "$2" ]; then
			CONFIG_FILE=$2
			shift
		else
			echo 'ERROR: "--conf" requires a non-empty option argument.'
			exit 1
		fi
		;;
	--conf=?*)
		CONFIG_FILE=${1#*=} # Delete everything up to "=" and assign the remainder.
		;;
	--conf=) # Handle the case of an empty --conf=
		echo 'ERROR: "--conf" requires a non-empty option argument.'
		exit 1
		;;
	--api) # Takes an option argument; ensure it has been specified.
		if [ "$2" ]; then
			DIR_api=$2
			shift
		else
			echo 'ERROR: "--api" requires a non-empty option argument.'
			exit 1
		fi
		;;
	--api=?*)
		DIR_api=${1#*=} # Delete everything up to "=" and assign the remainder.
		;;
	--api=) # Handle the case of an empty --api=
		echo 'ERROR: "--api" requires a non-empty option argument.'
		exit 1
		;;
	--zip) # Takes an option argument; ensure it has been specified.
		if [ "$2" ]; then
			DIR_zip=$2
			shift
		else
			echo 'ERROR: "--zip" requires a non-empty option argument.'
			exit 1
		fi
		;;
	--zip=?*)
		DIR_zip=${1#*=} # Delete everything up to "=" and assign the remainder.
		;;
	--zip=) # Handle the case of an empty --zip=
		echo 'ERROR: "--zip" requires a non-empty option argument.'
		exit 1
		;;
	*) # Default case: No more options, so break out of the loop.
		break ;;
	esac
	shift
done

# check if config file is set
setDefaults

# show the config values ¯\_(ツ)_/¯
if (("$DRY_RUN" == 1)); then
	echo "		${HEADER_TITLE}"
	echo "======================================================"
	echo "DIR_api:    ${DIR_api}"
	echo "DIR_zip:    ${DIR_zip}"
	echo "DIR_src:    ${DIR_src}"
	echo "DIR_conf:   ${DIR_conf}"
	echo "DIR_bible:  ${DIR_bible}"
	echo "QUIET:      ${QUIET}"
	echo "HASH_ONLY:   ${HASH_ONLY}"
	echo "GIT_HUB:     ${GIT_HUB}"
	echo "DOWNLOAD:   ${DOWNLOAD}"
	echo "PULL:       ${PULL}"
	echo "PUSH:       ${PUSH}"
	echo "CONFIG_FILE: ${CONFIG_FILE}"
	echo "======================================================"
	exit
fi

# run Main ┬┴┬┴┤(･_├┬┴┬┴
main