import { localizedPath, type Locale, type RouteId } from '@/lib/localization/config';

export type DestinationStatus = 'active' | 'disabled' | 'placeholder' | 'blocked';
export type DestinationKind =
  | 'internal-route'
  | 'external-url'
  | 'modal'
  | 'drawer'
  | 'form'
  | 'scheduler';

export type DestinationKey =
  | 'book-demo'
  | 'contact-sales'
  | 'product-tour'
  | 'pricing'
  | 'sign-in'
  | 'forgot-password'
  | 'privacy'
  | 'terms'
  | 'accessibility'
  | 'cookie-settings'
  | 'support';

export interface DestinationReference {
  key: DestinationKey;
  kind: DestinationKind;
  status: DestinationStatus;
  routeId?: RouteId;
  href?: string;
  featureFlag?: string;
  issueId?: string;
  external?: boolean;
  allowedLocales: readonly Locale[];
  reason: string;
}

const allLocales = ['en', 'fr', 'ar'] as const satisfies readonly Locale[];

const baseDestinations: Record<DestinationKey, DestinationReference> = {
  'book-demo': {
    key: 'book-demo',
    kind: 'modal',
    status: 'blocked',
    featureFlag: 'demoSubmissionEnabled',
    issueId: 'P9-002/P9-003',
    allowedLocales: allLocales,
    reason: 'Production CRM and legal consent decisions are not approved.',
  },
  'contact-sales': {
    key: 'contact-sales',
    kind: 'external-url',
    status: 'blocked',
    issueId: 'P9-015',
    allowedLocales: allLocales,
    reason: 'No approved sales destination exists.',
  },
  'product-tour': {
    key: 'product-tour',
    kind: 'modal',
    status: 'blocked',
    issueId: 'P9-012',
    allowedLocales: allLocales,
    reason: 'No approved product-tour medium or transcript exists.',
  },
  pricing: {
    key: 'pricing',
    kind: 'internal-route',
    status: 'placeholder',
    issueId: 'P9-008',
    allowedLocales: allLocales,
    reason: 'Public pricing and packaging are not approved.',
  },
  'sign-in': {
    key: 'sign-in',
    kind: 'internal-route',
    status: 'active',
    routeId: 'sign-in',
    allowedLocales: allLocales,
    reason: 'Sign-in is now served from the homepage app.',
  },
  'forgot-password': {
    key: 'forgot-password',
    kind: 'internal-route',
    status: 'active',
    routeId: 'forgot-password',
    allowedLocales: allLocales,
    reason: 'Password reset flow is now served from the homepage app.',
  },
  privacy: {
    key: 'privacy',
    kind: 'internal-route',
    status: 'placeholder',
    routeId: 'privacy',
    issueId: 'P9-003',
    allowedLocales: allLocales,
    reason: 'The privacy destination resolves to a gated placeholder pending legal copy.',
  },
  terms: {
    key: 'terms',
    kind: 'internal-route',
    status: 'placeholder',
    routeId: 'terms',
    issueId: 'P9-003',
    allowedLocales: allLocales,
    reason: 'The terms destination resolves to a gated placeholder pending legal copy.',
  },
  accessibility: {
    key: 'accessibility',
    kind: 'internal-route',
    status: 'placeholder',
    routeId: 'accessibility',
    issueId: 'P13-002',
    allowedLocales: allLocales,
    reason: 'The accessibility destination resolves to a gated placeholder pending approval.',
  },
  'cookie-settings': {
    key: 'cookie-settings',
    kind: 'modal',
    status: 'blocked',
    issueId: 'P9-004',
    allowedLocales: allLocales,
    reason: 'Consent categories and a consent-management mechanism are not approved.',
  },
  support: {
    key: 'support',
    kind: 'external-url',
    status: 'blocked',
    issueId: 'P9-015',
    allowedLocales: allLocales,
    reason: 'No approved public support destination exists.',
  },
};

export interface DestinationRuntimeContext {
  demoSubmissionEnabled: boolean;
  demoMode: 'blocked' | 'local';
}

export function destinationRegistry(
  context: DestinationRuntimeContext,
): Record<DestinationKey, DestinationReference> {
  const demo = baseDestinations['book-demo'];
  return {
    ...baseDestinations,
    'book-demo': {
      ...demo,
      status: context.demoSubmissionEnabled && context.demoMode === 'local' ? 'active' : 'blocked',
      reason:
        context.demoSubmissionEnabled && context.demoMode === 'local'
          ? 'Local validation adapter is active; no external lead is created.'
          : demo.reason,
    },
  };
}

export function resolveDestination(
  key: DestinationKey,
  locale: Locale,
  context: DestinationRuntimeContext,
): DestinationReference {
  const destination = destinationRegistry(context)[key];
  if (!destination.allowedLocales.includes(locale)) {
    return {
      ...destination,
      status: 'blocked',
      reason: 'Destination is unavailable for this locale.',
    };
  }
  if (destination.routeId) {
    return { ...destination, href: localizedPath(destination.routeId, locale) };
  }
  return destination;
}