import { describe, expect, it } from 'vitest'
import {
  INITIAL_DOMAIN_ACCESS_STATE,
  acceptDomainConnectionReceipt,
  acceptDomainSession,
  assertVerifiedDomainManifest,
  beginDomainAccess,
  disconnectDomainRuntime,
  enterDomainRuntime,
  projectPublicDomainVestibule,
  selectPublicDomain,
  type DomainConnectionReceipt,
  type DomainSessionCapability,
  type VerifiedDomainManifest,
} from './domainRuntimeContract'

const DIGEST = 'a'.repeat(64)
const NOW = 1_786_291_200_000

function manifest(): VerifiedDomainManifest {
  return {
    public: {
      accessModes: ['LOCAL_TERMINAL_NODE', 'USER_OWNED_REMOTE_NODE'],
      displayName: '第五域 · 光湖本源域',
      domainId: 'DOM-FIFTH-0001',
      formalName: '光湖本源域',
      publicStatus: 'PUBLIC_PREVIEW',
      purpose: '零点原核的工程本体与语言架构源点域',
      responsibleParty: '第五域主控',
      themePreview: {
        assetRef: 'theme-preview://origin-domain/lake-reflects-stars',
        description: '湖面映星公开预览',
      },
    },
    provenance: {
      digest: DIGEST,
      repositoryId: 'REPO-012',
      signature: 'signature-envelope-reference',
      signerId: 'SIGNER-FIFTH-DOMAIN-001',
      sourceCommit: '6e26d1f35439759542efb317c3ddd7661ba27d58',
    },
    runtime: {
      backendVersion: 'not-published',
      channelIds: ['CHANNEL-ZERO-CORE'],
      forbiddenDataScopes: ['private-relationship-core'],
      frontendVersion: 'not-published',
      healthCheckRef: 'health://origin-domain/runtime',
      moduleIds: ['MODULE-LANGUAGE-ARCHITECTURE'],
      rollbackVersion: 'not-published',
      routeRef: 'domain-route://origin-domain/runtime',
      themePackageRef: 'theme://origin-domain/lake-reflects-stars',
    },
    schema: 'gh-aios.domain-manifest/v1',
    verification: {
      manifestDigest: DIGEST,
      state: 'verified',
      verifiedAt: NOW,
    },
  }
}

function session(overrides: Partial<DomainSessionCapability> = {}): DomainSessionCapability {
  return {
    capabilityId: 'CAP-001',
    domainId: 'DOM-FIFTH-0001',
    expiresAt: NOW + 60_000,
    nodeId: 'LOCAL-NODE-001',
    nodeType: 'LOCAL_TERMINAL_NODE',
    scopes: ['domain:enter'],
    ...overrides,
  }
}

function receipt(overrides: Partial<DomainConnectionReceipt> = {}): DomainConnectionReceipt {
  return {
    connectionId: 'CONNECTION-001',
    domainId: 'DOM-FIFTH-0001',
    manifestDigest: DIGEST,
    nodeId: 'LOCAL-NODE-001',
    nodeType: 'LOCAL_TERMINAL_NODE',
    receiptId: 'RECEIPT-001',
    state: 'online',
    ...overrides,
  }
}

describe('domain runtime contract', () => {
  it('projects only public vestibule fields', () => {
    const publicView = projectPublicDomainVestibule(manifest())
    const serialized = JSON.stringify(publicView)

    expect(publicView.displayName).toBe('第五域 · 光湖本源域')
    expect(serialized).not.toContain('domain-route://')
    expect(serialized).not.toContain('CHANNEL-ZERO-CORE')
    expect(serialized).not.toContain('private-relationship-core')
    expect(serialized).not.toContain('REPO-012')
  })

  it('rejects a manifest that has not passed the external signature verifier', () => {
    const candidate = manifest()
    candidate.verification.state = 'verified'
    candidate.verification.manifestDigest = 'b'.repeat(64)

    expect(() => assertVerifiedDomainManifest(candidate)).toThrow('domain_manifest_digest_invalid')
  })

  it.each(['LOCAL_TERMINAL_NODE', 'USER_OWNED_REMOTE_NODE'] as const)(
    'accepts %s as a user-owned access node type',
    (nodeType) => {
      const selected = selectPublicDomain(INITIAL_DOMAIN_ACCESS_STATE, manifest().public)
      const access = beginDomainAccess(selected, manifest(), nodeType)

      expect(access).toMatchObject({ nodeType, stage: 'access' })
    },
  )

  it('does not enter a runtime with only a selected vestibule or frontend login state', () => {
    const selected = selectPublicDomain(INITIAL_DOMAIN_ACCESS_STATE, manifest().public)
    const access = beginDomainAccess(selected, manifest(), 'LOCAL_TERMINAL_NODE')

    expect(() => enterDomainRuntime(access, NOW)).toThrow('domain_runtime_session_missing')
    const withSession = acceptDomainSession(access, session(), NOW)
    expect(() => enterDomainRuntime(withSession, NOW)).toThrow('domain_runtime_connection_receipt_missing')
  })

  it('enters only after a matching live session and connection receipt', () => {
    const selected = selectPublicDomain(INITIAL_DOMAIN_ACCESS_STATE, manifest().public)
    const access = beginDomainAccess(selected, manifest(), 'LOCAL_TERMINAL_NODE')
    const withSession = acceptDomainSession(access, session(), NOW)
    const connected = acceptDomainConnectionReceipt(withSession, receipt())
    const runtime = enterDomainRuntime(connected, NOW)

    expect(runtime).toMatchObject({
      mode: 'connected',
      nodeType: 'LOCAL_TERMINAL_NODE',
      stage: 'runtime',
    })
  })

  it('fails closed when the session or receipt belongs to another domain', () => {
    const selected = selectPublicDomain(INITIAL_DOMAIN_ACCESS_STATE, manifest().public)
    const access = beginDomainAccess(selected, manifest(), 'LOCAL_TERMINAL_NODE')

    expect(() => acceptDomainSession(access, session({ domainId: 'DOMAIN-OTHER' }), NOW))
      .toThrow('domain_session_domain_mismatch')
    expect(() => acceptDomainSession(access, session({ nodeType: 'USER_OWNED_REMOTE_NODE' }), NOW))
      .toThrow('domain_session_node_type_mismatch')

    const withSession = acceptDomainSession(access, session(), NOW)
    expect(() => acceptDomainConnectionReceipt(withSession, receipt({ domainId: 'DOMAIN-OTHER' })))
      .toThrow('domain_connection_domain_mismatch')
    expect(() => acceptDomainConnectionReceipt(withSession, receipt({ nodeType: 'USER_OWNED_REMOTE_NODE' })))
      .toThrow('domain_connection_node_type_mismatch')
  })

  it('rejects the retired ambiguous cloud-resident node alias', () => {
    const candidate = manifest()
    candidate.public.accessModes = ['CLOUD_RESIDENT_NODE' as never]

    expect(() => assertVerifiedDomainManifest(candidate))
      .toThrow('domain_manifest_access_mode_invalid')
  })

  it('drops execution authority and keeps an explicit read-only scene after disconnect', () => {
    const selected = selectPublicDomain(INITIAL_DOMAIN_ACCESS_STATE, manifest().public)
    const access = beginDomainAccess(selected, manifest(), 'LOCAL_TERMINAL_NODE')
    const withSession = acceptDomainSession(access, session(), NOW)
    const connected = acceptDomainConnectionReceipt(withSession, receipt())
    const runtime = enterDomainRuntime(connected, NOW)

    expect(disconnectDomainRuntime(runtime).mode).toBe('disconnected-readonly')
  })
})