import * as Sentry from '@sentry/vue'
import type { RouteLocationNormalized, Router } from 'vue-router'
import { useAuthStore } from '@/stores/useAuthStore'
import { useOrganisationStore } from '@/stores/useOrganisationStore'

/**
 * Installs a Vue Router beforeEach guard that binds Sentry scope tags per
 * RFC-WS-7 §3.6. Frontend-equivalent of the backend AuthScopeContextListener.
 *
 * Three zones:
 *  - Token-based portal (route.meta.public === true && context === 'portal'):
 *    actor_scope=portal, no user_id/username — RFC §3.6 explicit. Stricter
 *    scrubbing applies via the {@link scrubEvent} hook regardless of zone.
 *  - Platform admin (path /platform/* with super_admin role): actor_scope=
 *    platform, full user context. No organisation_id (forced fallback would
 *    misattribute platform-scoped events).
 *  - Organizer (everything else, authenticated): actor_scope=organisation
 *    when an active organisation is selected; otherwise actor_scope=user.
 *  - Unauthenticated public pages (login, password reset): actor_scope=
 *    anonymous.
 *
 * Crewli's auth-store API differs from the RFC's speculative shape:
 *   - User identity:        useAuthStore().user (User | null)
 *   - Role list:            useAuthStore().appRoles (string[])
 *   - Active organisation:  useOrganisationStore().activeOrganisationId
 * The guard reads these stores directly; pinia must be initialised before
 * the first navigation, which is satisfied by registerPlugins() running
 * before app.mount() in main.ts.
 */
export function installContextBinding(router: Router): void {
  router.beforeEach(to => {
    bindScope(to)
  })
}

function bindScope(route: RouteLocationNormalized): void {
  Sentry.getCurrentScope().clear()

  const scope = Sentry.getCurrentScope()

  // Always-present route-scope tags. Frontend never has http.method on a
  // route navigation; that tag belongs to per-request fetch instrumentation
  // which sentry-vue auto-attaches to fetch breadcrumbs.
  scope.setTag('app', 'app')
  scope.setTag('route_name', String(route.name ?? 'unnamed'))

  // Token-based portal flow (artist advance, public form fill). RFC §3.6:
  // strict mode, no user_id, no username. The backend portal token already
  // resolves the organisation via the matching artist/event row, so a
  // captured frontend event correlates via request_id.
  if (route.meta.public === true && route.meta.context === 'portal') {
    scope.setTag('actor_scope', 'portal')
    scope.setTag('actor_type', 'portal_token')

    return
  }

  // Other public routes (login, forgot-password, register) — anonymous.
  const auth = useAuthStore()
  if (!auth.isAuthenticated || auth.user === null) {
    scope.setTag('actor_scope', 'anonymous')
    scope.setTag('actor_type', 'unauthenticated')

    return
  }

  // Authenticated zones — bind user identity (RFC §3.8: ULID, never email).
  scope.setUser({
    id: String(auth.user.id),
    username: String(auth.user.id),
  })
  scope.setTag('user_id', String(auth.user.id))

  // Platform admin scope: super_admin on /platform/* routes.
  if (route.path.startsWith('/platform') && auth.isSuperAdmin) {
    scope.setTag('actor_scope', 'platform')
    scope.setTag('actor_type', 'super_admin')

    return
  }

  // Organizer scope. Tag actor_scope=organisation when an active org is
  // selected (organisation_id from useOrganisationStore mirrors backend
  // route-param resolution). Otherwise actor_scope=user — Crewli's
  // many-to-many user-org model has no reliable single-org hint without
  // the active selection.
  const org = useOrganisationStore()
  if (org.activeOrganisationId !== null && org.activeOrganisationId !== '') {
    scope.setTag('actor_scope', 'organisation')
    scope.setTag('organisation_id', String(org.activeOrganisationId))
  }
  else {
    scope.setTag('actor_scope', 'user')
  }

  scope.setTag('actor_type', resolveActorType(auth.appRoles))
}

function resolveActorType(roles: readonly string[]): string {
  if (roles.includes('super_admin'))
    return 'super_admin'
  if (roles.includes('org_admin'))
    return 'organizer_admin'

  return 'org_member'
}