#!/bin/bash
#
# Test runner for Fawkss.

# --------------
# USER VARIABLES
# --------------

# Current working directory.
ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# Fawkss main script location.
FAWKSS_SCRIPT="${ROOT}/fawkss"

# ANSI Color definitions.
COLOR_WHITE="\033[1m"
COLOR_RED="\033[31m"
COLOR_GREEN="\033[32m"
COLOR_RESET="\033[0m"

# Initialize summary count array.
SUMMARY=(0 0 0)

# Helpers for extracting sections of test files.
read -d '' SECTION_TEST <<-'_EOF_'
	/--- TEST ---/     { test = 1; next }
	/--- EXPECTED ---/ { exit }
	test { print }
_EOF_

read -d '' SECTION_EXPECTED <<-'_EOF_'
	/--- EXPECTED ---/ { expected = 1; next }
	/--- END ---/      { exit }
	expected { print }
_EOF_

# --------------
# TEST EXECUTION
# --------------

echo -e ">> ${COLOR_WHITE}Executing tests...${COLOR_RESET}"

for file in ${@:-${ROOT}/spec/*.scss}
do
	# Check if file exists and is readable.
	if [ ! -f "${file}" ]
	then
		echo -e ">> ${COLOR_RED}Failed to find test file '${file}'${COLOR_RESET}"
		continue
	fi

	# Increase count of total tests run.
	SUMMARY[0]=$((${SUMMARY[0]} + 1))

	# Get diff between expected and actual output.
	result=$(colordiff -ud <(awk "${SECTION_EXPECTED}" "${file}") <(exec ${FAWKSS_SCRIPT} <(awk "${SECTION_TEST}" "${file}")) | tail -n +3)

	# Echo per-test results.
	echo -ne ">> ${COLOR_WHITE}Testing file '$(basename ${file})'...${COLOR_RESET} "

	if [ "x${result}" != "x" ]
	then
		# Increase total of failed tests run.
		SUMMARY[1]=$((${SUMMARY[1]} + 1))

		echo -e "${COLOR_RED}FAIL${COLOR_RESET}"
		echo "${result}"
	else
		# Increase total of successful tests run.
		SUMMARY[2]=$((${SUMMARY[2]} + 1))

		echo -e "${COLOR_GREEN}OK${COLOR_RESET}"
	fi

	echo -e ">> ${COLOR_WHITE}End of test for file '$(basename ${file})'${COLOR_RESET}"
done

# Echo total results.
echo -ne ">> ${COLOR_WHITE}Summary:${COLOR_RESET} "
echo -ne "Total ${COLOR_WHITE}${SUMMARY[0]}${COLOR_RESET}, "
echo -ne "Failed ${COLOR_RED}${SUMMARY[1]}${COLOR_RESET}, "
echo -e  "Successful ${COLOR_GREEN}${SUMMARY[2]}${COLOR_RESET}"