#!/bin/zsh
#
# a temporary template conversion utility for env.template (<=v4)
# to env.yaml (>=v5)
#
eval $(scwrypts --config)
use -c scwrypts/environment-files

ENVIRONMENT_ROOT="$1"
[ "$ENVIRONMENT_ROOT" ] || ENVIRONMENT_ROOT="${0:a:h}"

OLDENV="$ENVIRONMENT_ROOT/env.template"
NEWENV="$ENVIRONMENT_ROOT/env.yaml"
ENVMAP="$ENVIRONMENT_ROOT/.map.txt"

GROUP="$2"
[ $GROUP ] || GROUP=scwrypts
GENERATE_TEMPLATE \
	| sed '1,4d; /^$/d' \
	| sed -z 's/# \([^\n]*\)\n\([^\n]*\)=/\2=\n\2=DESCRIPTION=\1/g' \
	| sed '
		s/^export //
		/./i---
		s/\s\+$//
		s/__/=/g
		s/^\(AWS\|REDIS\)_/\1=/
		s/^\([^=]*\)=\([^=]*\)=\([^=]*\)=\([^=]*\)=\([^=]*\)=$/\L\1:\n  \2:\n    \3:\n      \4:\n        \5:/
		s/^\([^=]*\)=\([^=]*\)=\([^=]*\)=\([^=]*\)=$/\L\1:\n  \2:\n    \3:\n      \4:/
		s/^\([^=]*\)=\([^=]*\)=\([^=]*\)=$/\L\1:\n  \2:\n    \3:/
		s/^\([^=]*\)=\([^=]*\)=$/\L\1:\n  \2:/
		s/^\([^=]*\)=$/\L\1:/
		s/^\([^=]*\)=\([^=]*\)=\([^=]*\)=\([^=]*\)=\([^=]*\)=\([^=]\+\)$/\L\1:\n  \2:\n    \3:\n      \4:\n        \5: \E\6/
		s/^\([^=]*\)=\([^=]*\)=\([^=]*\)=\([^=]*\)=\([^=]\+\)$/\L\1:\n  \2:\n    \3:\n      \4: \E\5/
		s/^\([^=]*\)=\([^=]*\)=\([^=]*\)=\([^=]\+\)$/\L\1:\n  \2:\n    \3: \E\4/
		s/^\([^=]*\)=\([^=]*\)=\([^=]\+\)$/\L\1:\n  \2: \E\3/
		s/^\([^=]*\)=\([^=]\+\)$/\L\1: \E\2/
		s/: (\(.*\))/: [\1]/
		/^/,/:/{s/_/-/g}
		' \
	| sed '
		s/^    \(description:.*\)/  \1/
		s/description:/.DESCRIPTION:/
		' \
	| sed -z 's/\n\(\s\+\).DESCRIPTION:\([^\n]\+\)/\n\1.DESCRIPTION: >-\n\1  \2/g' \
	| yq eval-all '. as $item ireduce ({}; . *+ $item)' \
	> "$NEWENV" \
	;

cat -- "$OLDENV" \
	| sed '
		s/#.*//
		/^$/d
		s/^export //
		s/\s\+$//
		s/^\([^=]*\)=.*/\1=\n\1/
		' \
	| sed '
		/^/s/.*/\L&/
		/^/s/__/./g
		/^/s/_/-/g
		s/^/./
		s/\(aws\|redis\)-/\1./
		' \
	| perl -pe 's/=\n/^/' \
	| column -ts '^' \
	> "$ENVMAP" \
	;

while read line
do
	ENV_VAR=$(echo $line | awk '{print $1;}')
	LOOKUP=$(echo $line | awk '{print $2;}')

	cp "$NEWENV" "$NEWENV.temp"
	cat "$NEWENV.temp" \
		| yq ". | $LOOKUP.[\".ENVIRONMENT\"] = \"$ENV_VAR\"" \
		| yq 'sort_keys(...)' \
		> "$NEWENV"
		;
done < "$ENVMAP"

rm -- "$NEWENV.temp" "$ENVMAP" &>/dev/null

head -n1 -- "$NEWENV" | grep -q "^{}$" && {
	echo '---' > "$NEWENV"
}

cat -- "$NEWENV" | yq
SUCCESS "new environment saved to '$NEWENV'"