const AWS = require('aws-sdk');
const ec2 = new AWS.EC2();

exports.SUCCESS = "SUCCESS";
exports.FAILED = "FAILED";

const send = function(event, context, responseStatus, responseData, physicalResourceId) {
    var responseBody = JSON.stringify({
        Status: responseStatus,
        Reason: "See the details in CloudWatch Log Stream: " + context.logStreamName,
        PhysicalResourceId: physicalResourceId || context.logStreamName,
        StackId: event.StackId,
        RequestId: event.RequestId,
        LogicalResourceId: event.LogicalResourceId,
        Data: responseData
    });

    console.log("Response body:\n", responseBody);

    var https = require("https");
    var url = require("url");
    console.log("EVENT" + event.ResponseURL)
    var parsedUrl = url.parse(event.ResponseURL);
    var options = {
        hostname: parsedUrl.hostname,
        port: 443,
        path: parsedUrl.path,
        method: "PUT",
        headers: {
            "content-type": "",
            "content-length": responseBody.length
        }
    };

    var request = https.request(options, function(response) {
        console.log("Status code: " + response.statusCode);
        console.log("Status message: " + response.statusMessage);
        context.done();
    });

    request.on("error", function(error) {
        console.log("send(..) failed executing https.request(..): " + error);
        context.done();
    });

    request.write(responseBody);
    request.end();
};

exports.handler = async (event, context) => {
    const results = [];
    try {
        const data = await ec2.describeRegions().promise();

        const allRegions = data.Regions.map(region => region.RegionName);
        console.log('All regions:', allRegions);

        for (const region of allRegions) {
            try {
                const ec2Client = new AWS.EC2({ region });
                const vpcs = await ec2Client.describeVpcs().promise();
                const defaultVpc = vpcs.Vpcs.find(vpc => vpc.IsDefault);

                if (defaultVpc) {


                    results.push('Default VPC in ' + region + ':' + defaultVpc.VpcId);
                } else {
                    results.push('No default VPC found in ' + region);
                }
            } catch (error) {
                results.push('Error in ' + region + ':' + error.message);
            }
        }
    } catch (error) {
        results.push('Error fetching active regions: ' + error.message);
    }

    console.log('List of all default VPC:', results);

    // Use the send function to send the response
    await send(event, context, exports.SUCCESS, JSON.stringify(results));
};