#!/bin/bash
set -eo pipefail

declare -A cmd=(
	[apache]='apache2-foreground'
	[fpm]='php-fpm'
)

# version_greater_or_equal A B returns whether A >= B
function version_greater_or_equal() {
	[[ "$(printf '%s\n' "$@" | sort -V | head -n 1)" != "$1" || "$1" == "$2" ]];
}

latests=( $( curl -fsSL 'https://download.nextcloud.com/server/releases/' |tac|tac| \
	grep -oE 'nextcloud-[[:digit:]]+(.[[:digit:]]+)+' | \
	grep -oE '[[:digit:]]+(.[[:digit:]]+)+' | \
	sort -uV ) )

find -maxdepth 1 -type d -regextype sed -regex '\./[[:digit:]]\+\.[[:digit:]]\+' -exec rm -r '{}' \;

travisEnv=
for latest in "${latests[@]}"; do
	version=$(echo "$latest" | cut -d. -f1-2)

	# Only add versions >= 10
	if version_greater_or_equal "$version" "10.0"; then

		for variant in apache fpm; do
			# Create the version+variant directory with a Dockerfile.
			mkdir -p "$version/$variant"

			template="Dockerfile.template"
			if version_greater_or_equal "$version" "11.0"; then
				template="Dockerfile-php7.template"
			fi
			cp "$template" "$version/$variant/Dockerfile"

			echo "updating $latest [$version] $variant"

			# Replace the variables.
			sed -ri -e '
				s/%%VARIANT%%/'"$variant"'/g;
				s/%%VERSION%%/'"$latest"'/g;
				s/%%CMD%%/'"${cmd[$variant]}"'/g;
			' "$version/$variant/Dockerfile"

			# Remove Apache commands if we're not an Apache variant.
			if [ "$variant" != "apache" ]; then
				sed -ri -e '/a2enmod/d' "$version/$variant/Dockerfile"
			fi

			# Copy the docker-entrypoint.
			cp docker-entrypoint.sh "$version/$variant/docker-entrypoint.sh"

			# Copy apps.config.php
			cp apps.config.php "$version/$variant/apps.config.php"

			travisEnv='\n  - VERSION='"$version"' VARIANT='"$variant$travisEnv"
		done
	fi
done

# update .travis.yml
travis="$(awk -v 'RS=\n\n' '$1 == "env:" { $0 = "env:'"$travisEnv"'" } { printf "%s%s", $0, RS }' .travis.yml)"
echo "$travis"  > .travis.yml

# remove duplicate entries
echo "$(awk '!NF || !seen[$0]++' .travis.yml)" > .travis.yml