#!/usr/bin/env bash

# This script is expected to be run from the root of the project.

# Paths to the two implementations
GPL="src/gpl"
SPL="swipl"

GPL_FLAGS=("--debug")
SPL_FLAGS=("--quiet" "-t" "'true'")

# Directory containing test files
TEST_DIR="examples"

# Temporary files for storing outputs
GPL_OUT=$(mktemp)
SPL_OUT=$(mktemp)

# Flag to track if all tests pass
PASSED=0
FAILED=0

# Iterate over all test files in the test directory
#for TESTFILE in $(find ${TEST_DIR} -type f); do
files=("examples/program.pl" "examples/basics/disjunction.pl" "examples/basics/fraternity.pl")
for TESTFILE in "${files[@]}"; do
    # Run both programs with the test file
    "${SPL}" "${SPL_FLAGS[@]}" "$TESTFILE" > "${SPL_OUT}" 2>&1
    "${GPL}" "${GPL_FLAGS[@]}" -s "$TESTFILE" > "${GPL_OUT}" 2>&1

    # Compare the outputs
    if diff -q "$SPL_OUT" "$GPL_OUT" > /dev/null; then
        PASSED=$((PASSED + 1))
    else
        echo "Test failed! Outputs differ for $TESTFILE"
        printf "\nTest:\n%s\n" "$(cat "$TESTFILE")"
        printf "\nExpected:\n%s\n" "$(cat "$SPL_OUT")"
        printf "\nGot:\n%s\n" "$(cat "$GPL_OUT")"
        echo "-----------------------------------------"
        FAILED=$((FAILED + 1))
    fi
done

# Clean up temporary files
rm "$SPL_OUT" "$GPL_OUT"

# Final result, summary
if [ $FAILED -eq 0 ]; then
    echo "All tests passed!"
else
    printf "Tests passed: %d\nTests failed: %d\n" "$PASSED" "$FAILED"
    exit 1
fi