import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import ms, { StringValue } from 'ms';

@Injectable()
export class EnvironmentService {
  constructor(private configService: ConfigService) {}

  getNodeEnv(): string {
    return this.configService.get<string>('NODE_ENV', 'development');
  }

  isDevelopment(): boolean {
    return this.getNodeEnv() === 'development';
  }

  getAppUrl(): string {
    const rawUrl =
      this.configService.get<string>('APP_URL') ||
      `http://localhost:${this.getPort()}`;

    const { origin } = new URL(rawUrl);
    return origin;
  }

  isHttps(): boolean {
    const appUrl = this.configService.get<string>('APP_URL');
    try {
      const url = new URL(appUrl);
      return url.protocol === 'https:';
    } catch (error) {
      return false;
    }
  }

  getSubdomainHost(): string {
    return this.configService.get<string>('SUBDOMAIN_HOST');
  }

  getPort(): number {
    return parseInt(this.configService.get<string>('PORT', '3000'));
  }

  getAppSecret(): string {
    return this.configService.get<string>('APP_SECRET');
  }

  getDatabaseURL(): string {
    return this.configService.get<string>('DATABASE_URL');
  }

  getDatabaseMaxPool(): number {
    return parseInt(this.configService.get<string>('DATABASE_MAX_POOL', '10'));
  }

  getRedisUrl(): string {
    return this.configService.get<string>(
      'REDIS_URL',
      'redis://localhost:6379',
    );
  }

  getJwtTokenExpiresIn(): string {
    return this.configService.get<string>('JWT_TOKEN_EXPIRES_IN', '90d');
  }

  getCookieExpiresIn(): Date {
    const expiresInStr = this.getJwtTokenExpiresIn();
    let msUntilExpiry: number;
    try {
      msUntilExpiry = ms(expiresInStr as StringValue);
    } catch (err) {
      msUntilExpiry = ms('90d');
    }
    return new Date(Date.now() + msUntilExpiry);
  }

  getGotenbergUrl(): string | undefined {
    return this.configService.get<string>('GOTENBERG_URL');
  }

  getStorageDriver(): string {
    return this.configService.get<string>('STORAGE_DRIVER', 'local');
  }

  getFileUploadSizeLimit(): string {
    return this.configService.get<string>('FILE_UPLOAD_SIZE_LIMIT', '50mb');
  }

  getFileImportSizeLimit(): string {
    return this.configService.get<string>('FILE_IMPORT_SIZE_LIMIT', '200mb');
  }

  getAwsS3AccessKeyId(): string {
    return this.configService.get<string>('AWS_S3_ACCESS_KEY_ID');
  }

  getAwsS3SecretAccessKey(): string {
    return this.configService.get<string>('AWS_S3_SECRET_ACCESS_KEY');
  }

  getAwsS3Region(): string {
    return this.configService.get<string>('AWS_S3_REGION');
  }

  getAwsS3Bucket(): string {
    return this.configService.get<string>('AWS_S3_BUCKET');
  }

  getAwsS3Endpoint(): string {
    return this.configService.get<string>('AWS_S3_ENDPOINT');
  }

  getAwsS3ForcePathStyle(): boolean {
    const forcePathStyle = this.configService
      .get<string>('AWS_S3_FORCE_PATH_STYLE', 'false')
      .toLowerCase();
    return forcePathStyle === 'true';
  }

  getAwsS3Url(): string {
    return this.configService.get<string>('AWS_S3_URL');
  }

  getAzureStorageAccountName(): string {
    return this.configService.get<string>('AZURE_STORAGE_ACCOUNT_NAME');
  }

  getAzureStorageContainer(): string {
    return this.configService.get<string>('AZURE_STORAGE_CONTAINER');
  }

  getAzureStorageAccountKey(): string {
    return this.configService.get<string>('AZURE_STORAGE_ACCOUNT_KEY');
  }

  getAzureStorageEndpoint(): string {
    return this.configService.get<string>('AZURE_STORAGE_ENDPOINT');
  }

  getAzureStorageUrl(): string {
    return this.configService.get<string>('AZURE_STORAGE_URL');
  }

  getMailDriver(): string {
    return this.configService.get<string>('MAIL_DRIVER', 'log');
  }

  getMailFromAddress(): string {
    return this.configService.get<string>('MAIL_FROM_ADDRESS');
  }

  getMailFromName(): string {
    return this.configService.get<string>('MAIL_FROM_NAME', 'Docmost');
  }

  getMailBlockedRecipientDomains(): string[] {
    const raw = this.configService.get<string>(
      'MAIL_BLOCKED_RECIPIENT_DOMAINS',
      '',
    );
    return raw
      .split(',')
      .map((d) => d.trim().toLowerCase())
      .filter(Boolean);
  }

  getSmtpHost(): string {
    return this.configService.get<string>('SMTP_HOST');
  }

  getSmtpPort(): number {
    return parseInt(this.configService.get<string>('SMTP_PORT'));
  }

  getSmtpSecure(): boolean {
    const secure = this.configService
      .get<string>('SMTP_SECURE', 'false')
      .toLowerCase();
    return secure === 'true';
  }

  getSmtpIgnoreTLS(): boolean {
    const ignoretls = this.configService
      .get<string>('SMTP_IGNORETLS', 'false')
      .toLowerCase();
    return ignoretls === 'true';
  }

  getSmtpUsername(): string {
    return this.configService.get<string>('SMTP_USERNAME');
  }

  getSmtpPassword(): string {
    return this.configService.get<string>('SMTP_PASSWORD');
  }

  getPostmarkToken(): string {
    return this.configService.get<string>('POSTMARK_TOKEN');
  }

  getDrawioUrl(): string {
    return this.configService.get<string>('DRAWIO_URL');
  }

  isCloud(): boolean {
    const cloudConfig = this.configService
      .get<string>('CLOUD', 'false')
      .toLowerCase();
    return cloudConfig === 'true';
  }

  isSelfHosted(): boolean {
    return !this.isCloud();
  }

  isCompactPageTreeEnabled(): boolean {
    const compactTree = this.configService
      .get<string>('COMPACT_PAGE_TREE', 'true')
      .toLowerCase();
    return compactTree === 'true';
  }

  getStripePublishableKey(): string {
    return this.configService.get<string>('STRIPE_PUBLISHABLE_KEY');
  }

  getStripeSecretKey(): string {
    return this.configService.get<string>('STRIPE_SECRET_KEY');
  }

  getStripeWebhookSecret(): string {
    return this.configService.get<string>('STRIPE_WEBHOOK_SECRET');
  }

  getBillingTrialDays(): number {
    return parseInt(this.configService.get<string>('BILLING_TRIAL_DAYS', '14'));
  }

  getCollabUrl(): string {
    return this.configService.get<string>('COLLAB_URL');
  }

  isCollabDisableRedis(): boolean {
    const isStandalone = this.configService
      .get<string>('COLLAB_DISABLE_REDIS', 'false')
      .toLowerCase();
    return isStandalone === 'true';
  }

  isDisableTelemetry(): boolean {
    const disable = this.configService
      .get<string>('DISABLE_TELEMETRY', 'false')
      .toLowerCase();
    return disable === 'true';
  }

  getPostHogHost(): string {
    return this.configService.get<string>('POSTHOG_HOST');
  }

  getPostHogKey(): string {
    return this.configService.get<string>('POSTHOG_KEY');
  }

  getSearchDriver(): string {
    return this.configService
      .get<string>('SEARCH_DRIVER', 'database')
      .toLowerCase();
  }

  getTypesenseUrl(): string {
    return this.configService
      .get<string>('TYPESENSE_URL', 'http://localhost:8108')
      .toLowerCase();
  }

  getTypesenseApiKey(): string {
    return this.configService.get<string>('TYPESENSE_API_KEY');
  }

  getTypesenseLocale(): string {
    return this.configService
      .get<string>('TYPESENSE_LOCALE', 'en')
      .toLowerCase();
  }

  // NOTE: AI_*/OPENAI_*/GEMINI_*/OLLAMA_* env getters were removed (D8/§14[M3]):
  // provider/model/key config now lives solely in workspace settings +
  // ai_provider_credentials, with no env fallback. APP_SECRET stays (getAppSecret).

  getEventStoreDriver(): string {
    return this.configService
      .get<string>('EVENT_STORE_DRIVER', 'postgres')
      .toLowerCase();
  }

  getClickHouseUrl(): string {
    return this.configService.get<string>('CLICKHOUSE_URL');
  }

  getSamlDisableRequestedAuthnContext(): boolean {
    const disabled = this.configService
      .get<string>('SAML_DISABLE_REQUESTED_AUTHN_CONTEXT', 'false')
      .toLowerCase();
    return disabled === 'true';
  }

  isIframeEmbedAllowed(): boolean {
    const allowed = this.configService
      .get<string>('IFRAME_EMBED_ALLOWED', 'false')
      .toLowerCase();
    return allowed === 'true';
  }

  getIframeAllowedOrigins(): string[] {
    const raw = this.configService.get<string>('IFRAME_ALLOWED_ORIGINS', '');
    return raw
      .split(',')
      .map((o) => o.trim())
      .filter(Boolean);
  }

  // --- git-sync (plan §7.2) -------------------------------------------------

  /** Global master switch for the git-sync control plane (default false). */
  isGitSyncEnabled(): boolean {
    return (
      this.configService.get<string>('GIT_SYNC_ENABLED', 'false').toLowerCase() ===
      'true'
    );
  }

  /**
   * Whether gitmost serves the per-space vaults over smart-HTTP (the /git host).
   * When GIT_SYNC_HTTP_ENABLED is UNSET it DEFAULTS to isGitSyncEnabled() — so
   * enabling sync also enables the host unless explicitly disabled. When set, it
   * is honored verbatim ('true' -> on, anything else -> off).
   */
  isGitSyncHttpEnabled(): boolean {
    const raw = this.configService.get<string>('GIT_SYNC_HTTP_ENABLED');
    if (raw === undefined) return this.isGitSyncEnabled();
    return raw.toLowerCase() === 'true';
  }

  /**
   * Root directory holding the per-space vault repos. Defaults to
   * `<DATA_DIR or ./data>/git-sync`. `DATA_DIR` is read directly (no dedicated
   * getter exists in this codebase) so the vault root tracks the data volume.
   */
  getGitSyncDataDir(): string {
    const explicit = this.configService.get<string>('GIT_SYNC_DATA_DIR');
    if (explicit) return explicit;
    const dataDir = this.configService.get<string>('DATA_DIR') || './data';
    return `${dataDir.replace(/\/+$/, '')}/git-sync`;
  }

  /** Optional remote template, e.g. `git@host:vault-{spaceId}.git`. */
  getGitSyncRemoteTemplate(): string | undefined {
    return this.configService.get<string>('GIT_SYNC_REMOTE_TEMPLATE');
  }

  /**
   * Poll-safety interval in ms (default 15000). A NaN / non-positive value falls
   * back to the default so a bad override can never disable or zero the poll loop.
   */
  getGitSyncPollIntervalMs(): number {
    const parsed = parseInt(
      this.configService.get<string>('GIT_SYNC_POLL_INTERVAL_MS', '15000'),
      10,
    );
    return Number.isFinite(parsed) && parsed > 0 ? parsed : 15000;
  }

  /**
   * Event debounce window in ms (default 2000). A NaN / non-positive value falls
   * back to the default so a bad override can never disable the debounce.
   */
  getGitSyncDebounceMs(): number {
    const parsed = parseInt(
      this.configService.get<string>('GIT_SYNC_DEBOUNCE_MS', '2000'),
      10,
    );
    return Number.isFinite(parsed) && parsed > 0 ? parsed : 2000;
  }

  /**
   * Defense-in-depth absolute cap on how many pages a single push cycle may
   * soft-delete (default 5). A non-convergent / phantom-absence cycle whose push
   * plan would delete more than this is forced to skip deletions that cycle (the
   * orchestrator logs a WARNING). A non-positive or unparseable value falls back
   * to the default 5 so the cap can never be silently disabled.
   */
  getGitSyncMaxDeletesPerCycle(): number {
    const parsed = parseInt(
      this.configService.get<string>('GIT_SYNC_MAX_DELETES_PER_CYCLE', '5'),
      10,
    );
    return Number.isFinite(parsed) && parsed > 0 ? parsed : 5;
  }

  /**
   * The service user id git-sync writes are attributed to. Required when sync is
   * enabled (validated in environment.validation.ts); optional otherwise.
   */
  getGitSyncServiceUserId(): string | undefined {
    return this.configService.get<string>('GIT_SYNC_SERVICE_USER_ID');
  }

  /** Optional path to the SSH key used for git remote access. */
  getGitSyncSshKeyPath(): string | undefined {
    return this.configService.get<string>('GIT_SYNC_SSH_KEY_PATH');
  }
}