const { Stack, Duration, RemovalPolicy, CfnOutput } = require("aws-cdk-lib");
const lambda = require("aws-cdk-lib/aws-lambda");
const events = require("aws-cdk-lib/aws-events");
const targets = require("aws-cdk-lib/aws-events-targets");
const secretsmanager = require("aws-cdk-lib/aws-secretsmanager");
const logs = require("aws-cdk-lib/aws-logs");
const path = require("path");

class GoogleUserSyncStack extends Stack {
  constructor(scope, id, props) {
    super(scope, id, props);

    // -----------------------------------------------------------------
    // Reference existing secrets (created manually per PLAN.md Step 6)
    // -----------------------------------------------------------------
    const googleSecret = secretsmanager.Secret.fromSecretNameV2(
      this,
      "GoogleServiceAccountSecret",
      "google-user-sync/google-service-account"
    );

    const frontSecret = secretsmanager.Secret.fromSecretNameV2(
      this,
      "FrontApiTokenSecret",
      "google-user-sync/front-api-token"
    );

    // -----------------------------------------------------------------
    // Lambda function
    // -----------------------------------------------------------------
    const syncFn = new lambda.Function(this, "GoogleUserSyncFn", {
      functionName: "google-user-sync",
      runtime: lambda.Runtime.NODEJS_22_X,
      architecture: lambda.Architecture.ARM_64,
      handler: "index.handler",
      code: lambda.Code.fromAsset(path.join(__dirname, "..", "lambda")),
      timeout: Duration.minutes(5),
      memorySize: 256,
      environment: {
        GOOGLE_SECRET_ARN: googleSecret.secretArn,
        FRONT_SECRET_ARN: frontSecret.secretArn,
        GOOGLE_ADMIN_EMAIL: "adam@seahavenind.com",
        GOOGLE_DOMAIN: "seahavenind.com",
        GOOGLE_OUS: "/Office/Scheduling,/Office/Operations",
      },
      logRetention: logs.RetentionDays.TWO_MONTHS,
    });

    // Grant the Lambda read access to both secrets
    googleSecret.grantRead(syncFn);
    frontSecret.grantRead(syncFn);

    // -----------------------------------------------------------------
    // EventBridge scheduled rule — daily at 6:00 AM ET (11:00 UTC)
    // -----------------------------------------------------------------
    const rule = new events.Rule(this, "DailySyncRule", {
      ruleName: "google-user-sync-daily",
      schedule: events.Schedule.cron({
        minute: "0",
        hour: "11", // 11:00 UTC = 6:00 AM ET (EST+5) / 7:00 AM EDT
        month: "*",
        weekDay: "MON-FRI",
        year: "*",
      }),
    });

    rule.addTarget(new targets.LambdaFunction(syncFn));

    new CfnOutput(this, "SyncFunctionArn", {
      value: syncFn.functionArn,
    });
  }
}

module.exports = { GoogleUserSyncStack };