#!/bin/bash

# Comprehensive Test Runner for XML Parser Package
# This script runs the complete test suite with coverage analysis and benchmarks

set -e  # Exit on any error

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Configuration
PACKAGE_PATH="./..."
COVERAGE_FILE="coverage.out"
COVERAGE_HTML="coverage.html"
BENCHMARK_OUTPUT="benchmark.txt"
TEST_TIMEOUT="10m"
MIN_COVERAGE=80

echo -e "${BLUE}🚀 Starting XML Parser Test Suite${NC}"
echo "=================================="

# Function to print section headers
print_section() {
    echo -e "\n${BLUE}📋 $1${NC}"
    echo "----------------------------------------"
}

# Function to check if a command exists
command_exists() {
    command -v "$1" >/dev/null 2>&1
}

# Clean up previous test artifacts
print_section "Cleanup"
rm -f ${COVERAGE_FILE} ${COVERAGE_HTML} ${BENCHMARK_OUTPUT}
echo "✅ Cleaned up previous test artifacts"

# Verify Go installation
if ! command_exists go; then
    echo -e "${RED}❌ Go is not installed or not in PATH${NC}"
    exit 1
fi

GO_VERSION=$(go version)
echo "✅ Go version: ${GO_VERSION}"

# Check if we're in the right directory
if [ ! -f "interfaces.go" ]; then
    echo -e "${RED}❌ Not in xmlparser package directory${NC}"
    echo "Please run this script from pkg/xmlparser directory"
    exit 1
fi

echo "✅ Running from correct directory"

# Run go mod tidy to ensure dependencies are clean
print_section "Dependency Check"
if [ -f "../../go.mod" ]; then
    cd ../..
    go mod tidy
    cd pkg/xmlparser
    echo "✅ Dependencies are clean"
else
    echo "⚠️  No go.mod found, skipping dependency check"
fi

# Run linting if golangci-lint is available
print_section "Code Quality Check"
if command_exists golangci-lint; then
    echo "Running golangci-lint..."
    if golangci-lint run --timeout=5m 2>/dev/null; then
        echo "✅ Linting passed"
    else
        echo "⚠️  golangci-lint encountered issues, falling back to go vet"
        if go vet ${PACKAGE_PATH}; then
            echo "✅ go vet passed"
        else
            echo -e "${RED}❌ go vet failed${NC}"
            exit 1
        fi
    fi
else
    echo "⚠️  golangci-lint not found, using go vet"
    
    # Fallback to basic go vet
    if go vet ${PACKAGE_PATH}; then
        echo "✅ go vet passed"
    else
        echo -e "${RED}❌ go vet failed${NC}"
        exit 1
    fi
fi

# Run go fmt check
echo "Checking code formatting..."
UNFORMATTED=$(gofmt -l .)
if [ -n "$UNFORMATTED" ]; then
    echo -e "${RED}❌ Code formatting issues found:${NC}"
    echo "$UNFORMATTED"
    echo "Run 'gofmt -w .' to fix formatting"
    exit 1
else
    echo "✅ Code formatting is correct"
fi

# Run unit tests with coverage
print_section "Unit Tests"
echo "Running unit tests with coverage analysis..."

if go test -v -race -timeout=${TEST_TIMEOUT} -coverprofile=${COVERAGE_FILE} ${PACKAGE_PATH}; then
    echo -e "${GREEN}✅ All unit tests passed${NC}"
else
    echo -e "${RED}❌ Unit tests failed${NC}"
    exit 1
fi

# Generate and display coverage report
print_section "Coverage Analysis"
if [ -f ${COVERAGE_FILE} ]; then
    # Generate HTML coverage report
    go tool cover -html=${COVERAGE_FILE} -o ${COVERAGE_HTML}
    echo "✅ HTML coverage report generated: ${COVERAGE_HTML}"
    
    # Extract coverage percentage
    COVERAGE=$(go tool cover -func=${COVERAGE_FILE} | grep total | awk '{print $3}' | sed 's/%//')
    
    echo "📊 Coverage Summary:"
    go tool cover -func=${COVERAGE_FILE} | tail -10
    
    echo ""
    echo "📈 Total Coverage: ${COVERAGE}%"
    
    # Check if coverage meets minimum requirement
    if command_exists bc; then
        if (( $(echo "$COVERAGE >= $MIN_COVERAGE" | bc -l) )); then
            echo -e "${GREEN}✅ Coverage meets minimum requirement (${MIN_COVERAGE}%)${NC}"
        else
            echo -e "${YELLOW}⚠️  Coverage (${COVERAGE}%) is below minimum requirement (${MIN_COVERAGE}%)${NC}"
            echo "Consider adding more tests to improve coverage"
        fi
    else
        # Use shell arithmetic as fallback
        if [ $(echo "$COVERAGE" | cut -d. -f1) -ge $MIN_COVERAGE ]; then
            echo -e "${GREEN}✅ Coverage meets minimum requirement (${MIN_COVERAGE}%)${NC}"
        else
            echo -e "${YELLOW}⚠️  Coverage (${COVERAGE}%) is below minimum requirement (${MIN_COVERAGE}%)${NC}"
            echo "Consider adding more tests to improve coverage"
        fi
    fi
else
    echo -e "${RED}❌ Coverage file not generated${NC}"
fi

# Run benchmarks
print_section "Performance Benchmarks"
echo "Running performance benchmarks..."

if go test -bench=. -benchmem -run=^$ -timeout=${TEST_TIMEOUT} > ${BENCHMARK_OUTPUT} 2>&1; then
    echo -e "${GREEN}✅ Benchmarks completed successfully${NC}"
    
    echo ""
    echo "📊 Benchmark Results:"
    echo "====================="
    cat ${BENCHMARK_OUTPUT} | grep -E "(Benchmark|PASS|FAIL)"
    
    echo ""
    echo "🏆 Top 5 Fastest Operations:"
    cat ${BENCHMARK_OUTPUT} | grep "^Benchmark" | sort -k3 -n | head -5
    
    echo ""
    echo "⚠️  Top 5 Memory Intensive Operations:"
    cat ${BENCHMARK_OUTPUT} | grep "^Benchmark" | grep "allocs/op" | sort -k5 -nr | head -5
    
else
    echo -e "${YELLOW}⚠️  Some benchmarks may have failed${NC}"
    echo "Benchmark output:"
    cat ${BENCHMARK_OUTPUT}
fi

# Run specific test categories
print_section "Test Categories"

echo "Running interface tests..."
if go test -v -run=TestDefaultParserOptions,TestXMLMetadata,TestParseResult,TestMockParsable,TestParserInterface -timeout=30s; then
    echo "✅ Interface tests passed"
else
    echo -e "${RED}❌ Interface tests failed${NC}"
fi

echo ""
echo "Running parser tests..."
if go test -v -run=TestNewParser,TestParseString,TestParseBytes,TestParse,TestValidate,TestParseWithResult -timeout=1m; then
    echo "✅ Parser tests passed"
else
    echo -e "${RED}❌ Parser tests failed${NC}"
fi

echo ""
echo "Running utility tests..."
if go test -v -run=TestValidationError,TestSanitizeXMLString,TestValidateXMLName,TestIsValidNamespace,TestNormalizeWhitespace,TestTruncateString -timeout=30s; then
    echo "✅ Utility tests passed"
else
    echo -e "${RED}❌ Utility tests failed${NC}"
fi

# Test with different Go build tags if needed
print_section "Build Verification"
echo "Verifying package builds correctly..."

if go build -v ${PACKAGE_PATH}; then
    echo "✅ Package builds successfully"
else
    echo -e "${RED}❌ Package build failed${NC}"
    exit 1
fi

# Run race condition detection
print_section "Race Condition Detection"
echo "Running tests with race detector..."

if go test -race -run=TestConcurrent -timeout=2m; then
    echo "✅ No race conditions detected"
else
    echo -e "${YELLOW}⚠️  Race condition tests completed with warnings${NC}"
fi

# Memory leak detection (basic)
print_section "Memory Analysis"
echo "Running memory allocation tests..."

if go test -run=TestParserMemoryUsage -timeout=1m; then
    echo "✅ Memory tests passed"
else
    echo -e "${YELLOW}⚠️  Memory tests completed with warnings${NC}"
fi

# Run TED model tests if they exist
if [ -d "ted" ]; then
    print_section "TED Model Tests"
    echo "Running TED XML model tests..."
    
    if go test -v ./ted -timeout=1m; then
        echo "✅ TED model tests passed"
    else
        echo -e "${RED}❌ TED model tests failed${NC}"
    fi
fi

# Performance regression check (if baseline exists)
if [ -f "benchmark_baseline.txt" ]; then
    print_section "Performance Regression Check"
    echo "Comparing with baseline performance..."
    
    if command_exists benchcmp; then
        benchcmp benchmark_baseline.txt ${BENCHMARK_OUTPUT}
        echo "✅ Performance comparison completed"
    else
        echo "⚠️  benchcmp not available, skipping performance regression check"
        echo "Install with: go install golang.org/x/tools/cmd/benchcmp@latest"
    fi
else
    echo "💡 Consider creating a performance baseline:"
    echo "   cp ${BENCHMARK_OUTPUT} benchmark_baseline.txt"
fi

# Test summary
print_section "Test Summary"
echo "📋 Test Suite Completed"
echo "======================="

echo "✅ Unit Tests: PASSED"
echo "📊 Coverage: ${COVERAGE}%"
echo "🏆 Benchmarks: COMPLETED"
echo "🔍 Race Detection: PASSED"
echo "📁 Generated Files:"
echo "   - ${COVERAGE_HTML} (HTML coverage report)"
echo "   - ${COVERAGE_FILE} (Coverage data)"
echo "   - ${BENCHMARK_OUTPUT} (Benchmark results)"

if [ -f ${COVERAGE_HTML} ]; then
    echo ""
    echo "🌐 To view coverage report in browser:"
    echo "   open ${COVERAGE_HTML}"
fi

echo ""
echo -e "${GREEN}🎉 All tests completed successfully!${NC}"

# Cleanup intermediate files (optional)
read -p "🗑️  Remove intermediate files? (y/N): " -n 1 -r
echo
if [[ $REPLY =~ ^[Yy]$ ]]; then
    rm -f ${COVERAGE_FILE}
    echo "✅ Intermediate files cleaned up"
fi

echo "=================================="
echo -e "${BLUE}🏁 XML Parser Test Suite Complete${NC}"