const fs = require('fs');
const path = require('path');

const resultsPath = path.join(__dirname, 'test-results', 'results.json');
const qualityGateThresholds = {
    passRate: 95,
    flakyRate: 5,
    duration: 600000
};

function loadTestResults() {
    if (!fs.existsSync(resultsPath)) {
        console.error('❌ Test results not found!');
        process.exit(1);
    }

    const data = fs.readFileSync(resultsPath, 'utf-8');
    return JSON.parse(data);
}

function calculateMetrics(results) {
    const totalTests = results.stats.expected;
    const passedTests = results.stats.expected - results.stats.failed;
    const failedTests = results.stats.failed;
    const flakyTests = results.stats.flaky;
    const duration = results.stats.duration;

    const passRate = (passedTests / totalTests) * 100;
    const flakyRate = (flakyTests / totalTests) * 100;

    return {
        totalTests,
        passedTests,
        failedTests,
        flakyTests,
        duration,
        passRate: passRate.toFixed(2),
        flakyRate: flakyRate.toFixed(2)
    };
}

function checkQualityGate(metrics) {
    const failures = [];

    if (metrics.passRate < qualityGateThresholds.passRate) {
        failures.push(`Pass rate (${metrics.passRate}%) is below threshold (${qualityGateThresholds.passRate}%)`);
    }

    if (metrics.flakyRate > qualityGateThresholds.flakyRate) {
        failures.push(`Flaky rate (${metrics.flakyRate}%) is above threshold (${qualityGateThresholds.flakyRate}%)`);
    }

    if (metrics.duration > qualityGateThresholds.duration) {
        failures.push(`Test duration (${metrics.duration}ms) exceeds threshold (${qualityGateThresholds.duration}ms)`);
    }

    return failures;
}

function main() {
    console.log('🚦 Checking UAT Quality Gate...\n');

    const results = loadTestResults();
    const metrics = calculateMetrics(results);
    const failures = checkQualityGate(metrics);

    console.log('📊 Test Metrics:');
    console.log(`   Total Tests: ${metrics.totalTests}`);
    console.log(`   Passed: ${metrics.passedTests}`);
    console.log(`   Failed: ${metrics.failedTests}`);
    console.log(`   Flaky: ${metrics.flakyTests}`);
    console.log(`   Pass Rate: ${metrics.passRate}%`);
    console.log(`   Flaky Rate: ${metrics.flakyRate}%`);
    console.log(`   Duration: ${metrics.duration}ms\n`);

    if (failures.length === 0) {
        console.log('✅ Quality Gate Passed!');
        process.exit(0);
    } else {
        console.log('❌ Quality Gate Failed:');
        failures.forEach(failure => console.log(`   - ${failure}`));
        process.exit(1);
    }
}

main();