import * as cdk from 'aws-cdk-lib';

// Multi-environment configuration (PR2). Resolved from CDK context: `-c env=staging`,
// default `prod`. Only non-prod environments take a stack-name suffix.
//
// prod now targets the dedicated seahaven-prod workload account (011934824531); the mgmt
// account (328440206208) is FROZEN for new workloads. The prior proposal-system footprint
// was fully torn down 2026-07-14, so THIS first prod deploy is the last safe window to
// rename construct IDs / stack names. After prod go-live, renaming a deployed stack (or a
// stateful construct ID) triggers replace-and-delete, which would destroy the Aurora cluster.
//
// STAGING is intentionally NOT deployable: it still points at the frozen mgmt account, and
// resolveConfig() hard-throws on `env=staging` until it is retargeted to seahaven-dev
// (710827005802). See the guard in resolveConfig below.

export type EnvName = 'prod' | 'staging';

export interface EnvConfig {
  readonly envName: EnvName;
  readonly env: cdk.Environment;
  /** Suffix for stack names + construct IDs. '' for prod so deployed stacks are untouched. */
  readonly stackSuffix: string;
  /** S3 bucket CORS allowed origins. */
  readonly s3CorsOrigins: string[];
  /** API Gateway CORS allowed origins. */
  readonly apiCorsOrigins: string[];
  /** Cognito web-client callback / logout URLs. */
  readonly webCallbackUrls: string[];
  readonly webLogoutUrls: string[];
  /** Cognito hosted-UI domain prefix (must be globally unique). */
  readonly cognitoDomainPrefix: string;
  /** Email subscribed to the CloudWatch alarm SNS topic. */
  readonly alarmsEmail: string;
  /** Retain stateful resources (RDS, buckets) on stack deletion. */
  readonly retainData: boolean;
}

// seahaven-prod workload account (org prod OU). mgmt 328440206208 is frozen for workloads.
const PROD_ACCOUNT = '011934824531';
// Frozen mgmt account — staging still references it and must NOT be deployed there.
const MGMT_ACCOUNT_FROZEN = '328440206208';
const REGION = 'us-east-1';

const PROD: EnvConfig = {
  envName: 'prod',
  env: { account: PROD_ACCOUNT, region: REGION },
  stackSuffix: '',
  s3CorsOrigins: ['https://proposals.seahaven.com', 'http://localhost:5173'],
  apiCorsOrigins: [
    'https://proposals.seahaven.com',
    'https://d2yevct5e5uuz5.cloudfront.net',
    'http://localhost:5173',
  ],
  webCallbackUrls: [
    'https://proposals.seahaven.com/callback',
    'http://localhost:5173/callback',
  ],
  webLogoutUrls: ['https://proposals.seahaven.com', 'http://localhost:5173'],
  cognitoDomainPrefix: 'proposal-system-seahaven',
  alarmsEmail: 'adam@seahavenind.com',
  retainData: true,
};

// Staging: ⚠️ STILL points at the FROZEN mgmt account (MGMT_ACCOUNT_FROZEN). It is NOT
// deployable — resolveConfig() throws on env=staging. Retarget to seahaven-dev
// (710827005802) in a dedicated follow-up before ever enabling staging deploys.
// Suffixed stacks, CloudFront default URL + localhost, data not retained.
const STAGING: EnvConfig = {
  envName: 'staging',
  env: { account: MGMT_ACCOUNT_FROZEN, region: REGION },
  stackSuffix: '-staging',
  s3CorsOrigins: ['http://localhost:5173'],
  apiCorsOrigins: ['http://localhost:5173'],
  webCallbackUrls: ['http://localhost:5173/callback'],
  webLogoutUrls: ['http://localhost:5173'],
  cognitoDomainPrefix: 'proposal-system-seahaven-staging',
  alarmsEmail: 'adam@seahavenind.com',
  retainData: false,
};

const CONFIGS: Record<EnvName, EnvConfig> = { prod: PROD, staging: STAGING };

export function resolveConfig(app: cdk.App): EnvConfig {
  const name = (app.node.tryGetContext('env') as EnvName | undefined) ?? 'prod';
  const config = CONFIGS[name];
  if (!config) {
    throw new Error(`Unknown env '${name}'. Use -c env=prod (default) or -c env=staging.`);
  }
  // Hard guard: staging still targets the frozen mgmt account (328440206208). Block any
  // synth/deploy under env=staging until it is retargeted to seahaven-dev (710827005802),
  // so an accidental `-c env=staging` deploy can never land in the frozen mgmt account.
  if (name === 'staging') {
    throw new Error(
      'env=staging is disabled: it targets the FROZEN mgmt account (328440206208). ' +
        'Retarget STAGING to seahaven-dev (710827005802) in config.ts before using it.',
    );
  }
  return config;
}