#!/bin/bash

# Tester for philosophers_args exercise
# Tests complete philosophers implementation with arguments

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

EXERCISE="philosophers_args"
EXE_PATH=""
PASSED=0
FAILED=0

# Determine the project root directory, which is one level up from the 'testers' directory.
PROJECT_ROOT=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)

echo "========================================"
echo "Testing: $EXERCISE (Complete Philosophers)"
echo "========================================"

# Find the executable in the project root or the 'rendu' subdirectory.
if [ -f "$PROJECT_ROOT/$EXERCISE" ]; then
    EXE_PATH="$PROJECT_ROOT/$EXERCISE"
elif [ -f "$PROJECT_ROOT/rendu/$EXERCISE" ]; then
    EXE_PATH="$PROJECT_ROOT/rendu/$EXERCISE"
else
    echo -e "${RED}✗ Executable '$EXERCISE' not found in '$PROJECT_ROOT' or '$PROJECT_ROOT/rendu'${NC}"
    echo "Please compile your program first. Example:"
    echo "gcc -Wall -Wextra -Werror -pthread philosophers_args.c -o $EXERCISE"
    exit 1
fi

echo -e "${YELLOW}Found executable at: $EXE_PATH${NC}"

# Test 1: Basic execution (no one should die)
echo -n "Test 1: Basic case - 5 800 200 200... "
timeout 10 "$EXE_PATH" 5 800 200 200 > /tmp/philo_test1.txt 2>&1
EXIT_CODE=$?

if [ $EXIT_CODE -eq 0 ]; then
    OUTPUT=$(cat /tmp/philo_test1.txt)
    if ! echo "$OUTPUT" | grep -qiE "die"; then
        echo -e "${GREEN}✓ PASSED${NC}"
        ((PASSED++))
    else
        echo -e "${RED}✗ FAILED${NC}"
        echo "A philosopher died when they shouldn't have"
        ((FAILED++))
    fi
else
    echo -e "${RED}✗ FAILED (timeout or crash)${NC}"
    ((FAILED++))
fi

# Test 2: Death scenario (should die)
echo -n "Test 2: Death detection - 4 310 200 100... "
timeout 5 "$EXE_PATH" 4 310 200 100 > /tmp/philo_test2.txt 2>&1
OUTPUT=$(cat /tmp/philo_test2.txt)

if echo "$OUTPUT" | grep -qiE "die"; then
    echo -e "${GREEN}✓ PASSED${NC} (death detected)"
    ((PASSED++))
else
    echo -e "${RED}✗ FAILED${NC}"
    echo "A philosopher should have died but didn't"
    ((FAILED++))
fi

# Test 3: Meals limit
echo -n "Test 3: Meal limit - 5 800 200 200 7... "
timeout 15 "$EXE_PATH" 5 800 200 200 7 > /tmp/philo_test3.txt 2>&1
EXIT_CODE=$?
OUTPUT=$(cat /tmp/philo_test3.txt)

if [ $EXIT_CODE -eq 0 ]; then
    # Check if program terminated (should stop after all ate 7 times)
    if echo "$OUTPUT" | grep -qiE "(done|finish|complete|all.*eat)" || [ $(echo "$OUTPUT" | wc -l) -lt 1000 ]; then
        echo -e "${GREEN}✓ PASSED${NC}"
        ((PASSED++))
    else
        echo -e "${YELLOW}⚠ PARTIAL${NC} (program completed but unclear if meal limit worked)"
        ((PASSED++))
    fi
else
    echo -e "${RED}✗ FAILED${NC}"
    ((FAILED++))
fi

# Test 4: Single philosopher (should die)
echo -n "Test 4: Single philosopher - 1 800 200 200... "
timeout 3 "$EXE_PATH" 1 800 200 200 > /tmp/philo_test4.txt 2>&1
OUTPUT=$(cat /tmp/philo_test4.txt)

if echo "$OUTPUT" | grep -qiE "die"; then
    echo -e "${GREEN}✓ PASSED${NC} (died as expected)"
    ((PASSED++))
else
    echo -e "${RED}✗ FAILED${NC}"
    echo "Single philosopher should die (no fork available)"
    ((FAILED++))
fi

# Test 5: Invalid arguments
echo -n "Test 5: Invalid argument handling... "
timeout 2 "$EXE_PATH" 0 800 200 200 > /dev/null 2>&1
EXIT1=$?
timeout 2 "$EXE_PATH" 5 -100 200 200 > /dev/null 2>&1
EXIT2=$?
timeout 2 "$EXE_PATH" abc def ghi > /dev/null 2>&1
EXIT3=$?

if [ $EXIT1 -ne 0 ] && [ $EXIT2 -ne 0 ] && [ $EXIT3 -ne 0 ]; then
    echo -e "${GREEN}✓ PASSED${NC}"
    ((PASSED++))
else
    echo -e "${RED}✗ FAILED${NC}"
    echo "Program should reject invalid arguments"
    ((FAILED++))
fi

# Test 6: Check for memory leaks with valgrind
if command -v valgrind &> /dev/null; then
    echo -n "Test 6: Memory leak check... "
    VALGRIND_OUTPUT=$(valgrind --leak-check=full --error-exitcode=42 "$EXE_PATH" 4 410 200 200 2>&1)
    if [ $? -ne 42 ]; then
        echo -e "${GREEN}✓ PASSED${NC}"
        ((PASSED++))
    else
        echo -e "${RED}✗ FAILED${NC}"
        echo "Memory leaks detected!"
        echo "$VALGRIND_OUTPUT" | grep -A 5 "LEAK SUMMARY"
        ((FAILED++))
    fi
else
    echo -e "${YELLOW}⊘ Test 6: Valgrind not installed, skipping memory test${NC}"
fi

# Test 7: Thread sanitizer check
if command -v gcc &> /dev/null; then
    echo -n "Test 7: Data race detection... "
    # Find the source file to compile
    SOURCE_FILE=""
    if [ -f "$PROJECT_ROOT/rendu/${EXERCISE}.c" ]; then
        SOURCE_FILE="$PROJECT_ROOT/rendu/${EXERCISE}.c"
    elif [ -f "$PROJECT_ROOT/${EXERCISE}.c" ]; then
        SOURCE_FILE="$PROJECT_ROOT/${EXERCISE}.c"
    fi

    if [ -n "$SOURCE_FILE" ]; then
        TSAN_EXE="$PROJECT_ROOT/$(basename "$EXE_PATH")_tsan"
        gcc -Wall -Wextra -Werror -pthread -fsanitize=thread -g "$SOURCE_FILE" -o "$TSAN_EXE" 2>/dev/null
        if [ $? -eq 0 ]; then
            TSAN_OUTPUT=$(timeout 15 "$TSAN_EXE" 4 410 200 200 2>&1)
            if echo "$TSAN_OUTPUT" | grep -q "WARNING: ThreadSanitizer: data race"; then
                echo -e "${RED}✗ FAILED${NC}"
                echo "Data race detected!"
                echo "$TSAN_OUTPUT" | head -20
                ((FAILED++))
            else
                echo -e "${GREEN}✓ PASSED${NC}"
                ((PASSED++))
            fi
            rm -f "$TSAN_EXE"
        else
            echo -e "${YELLOW}⊘ Could not compile with ThreadSanitizer, skipping test${NC}"
        fi
    else
        echo -e "${YELLOW}⊘ Source file ${EXERCISE}.c not found, skipping ThreadSanitizer test${NC}"
    fi
else
    echo -e "${YELLOW}⊘ Test 7: gcc not found, skipping data race test${NC}"
fi

# Cleanup
rm -f /tmp/philo_test*.txt

# Final summary
echo "----------------------------------------"
if [ $FAILED -eq 0 ]; then
    echo -e "${GREEN}Summary: All $PASSED tests passed for $EXERCISE!${NC}"
    exit 0
else
    echo -e "${RED}Summary: $FAILED out of $((PASSED + FAILED)) tests failed for $EXERCISE.${NC}"
    exit 1
fi