#!/bin/bash
#
# Validate Test Coverage
#
# Checks that test coverage meets minimum thresholds

set -e

# Default thresholds
MIN_COVERAGE=${MIN_COVERAGE:-70}

echo "📊 Validating test coverage..."

# Detect project type
if [ -f "package.json" ]; then
    PROJECT_TYPE="node"
elif [ -f "setup.py" ] || [ -f "pyproject.toml" ]; then
    PROJECT_TYPE="python"
else
    echo "❌ Error: Could not detect project type"
    exit 1
fi

# Check coverage for Node.js projects
if [ "$PROJECT_TYPE" == "node" ]; then
    echo "📦 Node.js project detected"

    # Check if coverage data exists
    if [ ! -d "coverage" ]; then
        echo "❌ Error: No coverage data found"
        echo "   Run 'npm run test:coverage' first"
        exit 1
    fi

    # Check if coverage summary exists
    if [ ! -f "coverage/coverage-summary.json" ]; then
        echo "❌ Error: coverage-summary.json not found"
        exit 1
    fi

    # Extract coverage percentages using jq if available
    if command -v jq &> /dev/null; then
        LINES=$(jq '.total.lines.pct' coverage/coverage-summary.json)
        STATEMENTS=$(jq '.total.statements.pct' coverage/coverage-summary.json)
        FUNCTIONS=$(jq '.total.functions.pct' coverage/coverage-summary.json)
        BRANCHES=$(jq '.total.branches.pct' coverage/coverage-summary.json)

        echo ""
        echo "Coverage Summary:"
        echo "  Lines:      ${LINES}%"
        echo "  Statements: ${STATEMENTS}%"
        echo "  Functions:  ${FUNCTIONS}%"
        echo "  Branches:   ${BRANCHES}%"
        echo ""

        # Check thresholds
        FAILED=0
        if (( $(echo "$LINES < $MIN_COVERAGE" | bc -l) )); then
            echo "❌ Lines coverage (${LINES}%) below threshold (${MIN_COVERAGE}%)"
            FAILED=1
        fi
        if (( $(echo "$STATEMENTS < $MIN_COVERAGE" | bc -l) )); then
            echo "❌ Statements coverage (${STATEMENTS}%) below threshold (${MIN_COVERAGE}%)"
            FAILED=1
        fi
        if (( $(echo "$FUNCTIONS < $MIN_COVERAGE" | bc -l) )); then
            echo "❌ Functions coverage (${FUNCTIONS}%) below threshold (${MIN_COVERAGE}%)"
            FAILED=1
        fi
        if (( $(echo "$BRANCHES < $MIN_COVERAGE" | bc -l) )); then
            echo "❌ Branches coverage (${BRANCHES}%) below threshold (${MIN_COVERAGE}%)"
            FAILED=1
        fi

        if [ $FAILED -eq 1 ]; then
            echo ""
            echo "❌ Coverage validation failed"
            exit 1
        fi

        echo "✅ Coverage thresholds met!"
    else
        echo "⚠️  jq not installed, skipping detailed validation"
        echo "   Install jq for detailed coverage validation"
    fi

# Check coverage for Python projects
elif [ "$PROJECT_TYPE" == "python" ]; then
    echo "🐍 Python project detected"

    # Check if coverage data exists
    if [ ! -f ".coverage" ]; then
        echo "❌ Error: No coverage data found"
        echo "   Run 'pytest --cov' first"
        exit 1
    fi

    # Generate coverage report
    if command -v coverage &> /dev/null; then
        echo ""
        coverage report

        # Get total coverage percentage
        TOTAL_COVERAGE=$(coverage report | tail -1 | awk '{print $NF}' | sed 's/%//')

        echo ""
        echo "Total Coverage: ${TOTAL_COVERAGE}%"
        echo "Minimum Required: ${MIN_COVERAGE}%"

        # Compare coverage
        if (( $(echo "$TOTAL_COVERAGE < $MIN_COVERAGE" | bc -l) )); then
            echo ""
            echo "❌ Coverage (${TOTAL_COVERAGE}%) below threshold (${MIN_COVERAGE}%)"
            exit 1
        fi

        echo ""
        echo "✅ Coverage thresholds met!"
    else
        echo "❌ Error: coverage tool not installed"
        echo "   Install with: pip install coverage"
        exit 1
    fi
fi

echo ""
echo "🎉 Coverage validation passed!"