#!/usr/bin/env bash

if [ $# -lt 3 ]; then
	echo "usage: $0 <db-name> <db-user> <db-pass> [db-host] [wp-version] [skip-database-creation]"
	exit 1
fi

DB_NAME=$1
DB_USER=$2
DB_PASS=$3
DB_HOST=${4-localhost}
WP_VERSION=${5-latest}
SKIP_DB_CREATE=${6-false}

TMPDIR=${TMPDIR-/tmp}
TMPDIR=$(echo "$TMPDIR" | sed -e "s/\/$//")
WP_TESTS_DIR=${WP_TESTS_DIR-$TMPDIR/wordpress-tests-lib}
WP_CORE_DIR=${WP_CORE_DIR-$TMPDIR/wordpress/}

download() {
	if [ "$(which curl)" ]; then
		curl -s "$1" > "$2";
	elif [ "$(which wget)" ]; then
		wget -nv -O "$2" "$1"
	else
		echo "Error: neither curl nor wget is installed."
		exit 1
	fi
}

if [[ $WP_VERSION =~ ^[0-9]+\.[0-9]+\-(beta|RC)[0-9]+$ ]]; then
	WP_BRANCH=${WP_VERSION%\-*}
	WP_TESTS_TAG="branches/$WP_BRANCH"
elif [[ $WP_VERSION =~ ^[0-9]+\.[0-9]+$ ]]; then
	WP_TESTS_TAG="branches/$WP_VERSION"
elif [[ $WP_VERSION =~ [0-9]+\.[0-9]+\.[0-9]+ ]]; then
	if [[ $WP_VERSION =~ [0-9]+\.[0-9]+\.[0] ]]; then
		# version x.x.0 means the first release of the major version, so strip the .0
		WP_TESTS_TAG="tags/${WP_VERSION%??}"
	else
		WP_TESTS_TAG="tags/$WP_VERSION"
	fi
elif [[ $WP_VERSION == 'nightly' || $WP_VERSION == 'trunk' ]]; then
	WP_TESTS_TAG="trunk"
else
	# http serves a single offer, whereas https serves multiple. we only want one
	download http://api.wordpress.org/core/version-check/1.7/ /tmp/wp-latest.json
	LATEST_VERSION=$(grep -o '"version":"[^"]*' /tmp/wp-latest.json | sed 's/"version":"//' | head -1)
	if [[ -z "$LATEST_VERSION" ]]; then
		echo "Latest WordPress version could not be found"
		exit 1
	fi
	WP_TESTS_TAG="tags/$LATEST_VERSION"
fi
set -ex

install_wp() {
	# Check for an actual WP install, not just the directory: when WP_CORE_DIR
	# is a pre-mounted (empty) Docker volume, the directory always exists.
	if [ -f "$WP_CORE_DIR/wp-settings.php" ]; then
		return;
	fi

	mkdir -p "$WP_CORE_DIR"

	if [[ $WP_VERSION == 'nightly' || $WP_VERSION == 'trunk' ]]; then
		mkdir -p "$TMPDIR/wordpress-nightly"
		download https://wordpress.org/nightly-builds/wordpress-latest.zip "$TMPDIR/wordpress-nightly/wordpress-nightly.zip"
		unzip -q "$TMPDIR/wordpress-nightly/wordpress-nightly.zip" -d "$TMPDIR/wordpress-nightly/"
		mv "$TMPDIR"/wordpress-nightly/wordpress/* "$WP_CORE_DIR"
	else
		if [ "$WP_VERSION" == 'latest' ]; then
			local ARCHIVE_NAME='latest'
		elif [[ $WP_VERSION =~ [0-9]+\.[0-9]+ ]]; then
			download https://api.wordpress.org/core/version-check/1.7/ "$TMPDIR/wp-latest.json"
			if [[ $WP_VERSION =~ [0-9]+\.[0-9]+\.[0] ]]; then
				LATEST_VERSION=${WP_VERSION%??}
			else
				local VERSION_ESCAPED
				VERSION_ESCAPED=$(echo "$WP_VERSION" | sed 's/\./\\\\./g')
				LATEST_VERSION=$(grep -o '"version":"'"$VERSION_ESCAPED"'[^"]*' "$TMPDIR/wp-latest.json" | sed 's/"version":"//' | head -1)
			fi
			if [[ -z "$LATEST_VERSION" ]]; then
				local ARCHIVE_NAME="wordpress-$WP_VERSION"
			else
				local ARCHIVE_NAME="wordpress-$LATEST_VERSION"
			fi
		else
			local ARCHIVE_NAME="wordpress-$WP_VERSION"
		fi
		download https://wordpress.org/${ARCHIVE_NAME}.tar.gz "$TMPDIR/wordpress.tar.gz"
		tar --strip-components=1 -zxmf "$TMPDIR/wordpress.tar.gz" -C "$WP_CORE_DIR"
	fi
}

install_test_suite() {
	# portable in-place sed for GNU and BSD/macOS
	if [[ $(uname -s) == 'Darwin' ]]; then
		local ioption='-i.bak'
	else
		local ioption='-i'
	fi

	# Check for the test-library files, not just the directory: when
	# WP_TESTS_DIR is a pre-mounted (empty) Docker volume, the dir always exists.
	if [ ! -f "$WP_TESTS_DIR/includes/functions.php" ]; then
		mkdir -p "$WP_TESTS_DIR"
		rm -rf "$WP_TESTS_DIR"/{includes,data}
		svn export --quiet --ignore-externals https://develop.svn.wordpress.org/${WP_TESTS_TAG}/tests/phpunit/includes/ "$WP_TESTS_DIR/includes"
		svn export --quiet --ignore-externals https://develop.svn.wordpress.org/${WP_TESTS_TAG}/tests/phpunit/data/ "$WP_TESTS_DIR/data"
	fi

	if [ ! -f "$WP_TESTS_DIR/wp-tests-config.php" ]; then
		download https://develop.svn.wordpress.org/${WP_TESTS_TAG}/wp-tests-config-sample.php "$WP_TESTS_DIR/wp-tests-config.php"
		WP_CORE_DIR=$(echo "$WP_CORE_DIR" | sed "s:/\+$::")
		sed $ioption "s:dirname( __FILE__ ) . '/src/':'$WP_CORE_DIR/':" "$WP_TESTS_DIR/wp-tests-config.php"
		sed $ioption "s:__DIR__ . '/src/':'$WP_CORE_DIR/':" "$WP_TESTS_DIR/wp-tests-config.php"
		sed $ioption "s/youremptytestdbnamehere/$DB_NAME/" "$WP_TESTS_DIR/wp-tests-config.php"
		sed $ioption "s/yourusernamehere/$DB_USER/" "$WP_TESTS_DIR/wp-tests-config.php"
		sed $ioption "s/yourpasswordhere/$DB_PASS/" "$WP_TESTS_DIR/wp-tests-config.php"
		sed $ioption "s|localhost|${DB_HOST}|" "$WP_TESTS_DIR/wp-tests-config.php"
	fi
}

recreate_db() {
	shopt -s nocasematch
	if [[ $1 =~ ^(y|yes)$ ]]; then
		mysqladmin drop "$DB_NAME" -f --user="$DB_USER" --password="$DB_PASS"$EXTRA
		create_db
		echo "Recreated the database ($DB_NAME)."
	else
		echo "Leaving the existing database ($DB_NAME) in place."
	fi
	shopt -u nocasematch
}

create_db() {
	mysqladmin create "$DB_NAME" --user="$DB_USER" --password="$DB_PASS"$EXTRA
}

install_db() {
	if [ "${SKIP_DB_CREATE}" = "true" ]; then
		return 0
	fi

	local PARTS=(${DB_HOST//\:/ })
	local DB_HOSTNAME=${PARTS[0]};
	local DB_SOCK_OR_PORT=${PARTS[1]};
	local EXTRA=""

	if ! [ -z "$DB_HOSTNAME" ]; then
		if echo "$DB_SOCK_OR_PORT" | grep -qe '^[0-9]\{1,\}$'; then
			EXTRA=" --host=$DB_HOSTNAME --port=$DB_SOCK_OR_PORT --protocol=tcp"
		elif ! [ -z "$DB_SOCK_OR_PORT" ]; then
			EXTRA=" --socket=$DB_SOCK_OR_PORT"
		elif ! [ -z "$DB_HOSTNAME" ]; then
			EXTRA=" --host=$DB_HOSTNAME --protocol=tcp"
		fi
	fi

	if [ "$(mysql --user="$DB_USER" --password="$DB_PASS"$EXTRA --execute='show databases;' | grep "^$DB_NAME$")" ]; then
		echo "Reinstalling will delete the existing test database ($DB_NAME)"
		read -p 'Are you sure you want to proceed? [y/N]: ' DELETE_EXISTING_DB
		recreate_db "$DELETE_EXISTING_DB"
	else
		create_db
	fi
}

install_wp
install_test_suite
install_db