/**
 * Monitoring configuration using Yup
 * Prometheus metrics, Grafana visualization, and Loki logging
 */
import { cleanEnv, envValidators } from './env-utils';

const { str, port, bool, num, strWithChoices } = envValidators;

/**
 * Prometheus configuration with validation and defaults
 */
export const prometheusConfig = cleanEnv(process.env, {
  // Prometheus Server
  PROMETHEUS_HOST: str('localhost', 'Prometheus host'),
  PROMETHEUS_PORT: port(9090, 'Prometheus port'),
  PROMETHEUS_URL: str('', 'Complete Prometheus URL (overrides host/port)'),

  // Authentication
  PROMETHEUS_USERNAME: str('', 'Prometheus username (if auth enabled)'),
  PROMETHEUS_PASSWORD: str('', 'Prometheus password (if auth enabled)'),

  // Metrics Collection
  PROMETHEUS_SCRAPE_INTERVAL: str('15s', 'Default scrape interval'),
  PROMETHEUS_EVALUATION_INTERVAL: str('15s', 'Rule evaluation interval'),
  PROMETHEUS_RETENTION_TIME: str('15d', 'Data retention time'),

  // TLS Settings
  PROMETHEUS_TLS_ENABLED: bool(false, 'Enable TLS for Prometheus'),
  PROMETHEUS_TLS_INSECURE: bool(false, 'Skip TLS verification'),
});

/**
 * Grafana configuration with validation and defaults
 */
export const grafanaConfig = cleanEnv(process.env, {
  // Grafana Server
  GRAFANA_HOST: str('localhost', 'Grafana host'),
  GRAFANA_PORT: port(3000, 'Grafana port'),
  GRAFANA_URL: str('', 'Complete Grafana URL (overrides host/port)'),

  // Authentication
  GRAFANA_ADMIN_USER: str('admin', 'Grafana admin username'),
  GRAFANA_ADMIN_PASSWORD: str('admin', 'Grafana admin password'),

  // Security Settings
  GRAFANA_ALLOW_SIGN_UP: bool(false, 'Allow user sign up'),
  GRAFANA_SECRET_KEY: str('', 'Grafana secret key for encryption'),

  // Database Settings
  GRAFANA_DATABASE_TYPE: strWithChoices(
    ['mysql', 'postgres', 'sqlite3'],
    'sqlite3',
    'Grafana database type'
  ),
  GRAFANA_DATABASE_URL: str('', 'Grafana database URL'),

  // Feature Flags
  GRAFANA_DISABLE_GRAVATAR: bool(true, 'Disable Gravatar avatars'),
  GRAFANA_ENABLE_GZIP: bool(true, 'Enable gzip compression'),
});

// Export typed configuration objects
export type PrometheusConfig = typeof prometheusConfig;
export type GrafanaConfig = typeof grafanaConfig;

// Export individual config values for convenience
export const {
  PROMETHEUS_HOST,
  PROMETHEUS_PORT,
  PROMETHEUS_URL,
  PROMETHEUS_USERNAME,
  PROMETHEUS_PASSWORD,
  PROMETHEUS_SCRAPE_INTERVAL,
  PROMETHEUS_EVALUATION_INTERVAL,
  PROMETHEUS_RETENTION_TIME,
  PROMETHEUS_TLS_ENABLED,
  PROMETHEUS_TLS_INSECURE,
} = prometheusConfig;

export const {
  GRAFANA_HOST,
  GRAFANA_PORT,
  GRAFANA_URL,
  GRAFANA_ADMIN_USER,
  GRAFANA_ADMIN_PASSWORD,
  GRAFANA_ALLOW_SIGN_UP,
  GRAFANA_SECRET_KEY,
  GRAFANA_DATABASE_TYPE,
  GRAFANA_DATABASE_URL,
  GRAFANA_DISABLE_GRAVATAR,
  GRAFANA_ENABLE_GZIP,
} = grafanaConfig;