export const GUANGHU_LIVING_SYSTEM_VERSION = 1 as const

export const GUANGHU_CHANNEL_ROUTES = [
  'world',
  'world-login',
  'zero-core',
  'fifth-domain',
  'pufferfish',
  'eternal-lake-heart',
  'light-lake',
  'heartbeat-core',
  'education-work-lake',
  'love-core',
  'servers',
] as const

export type GuanghuChannelRoute = typeof GUANGHU_CHANNEL_ROUTES[number]
export type LivingSceneDepth = 'overview' | 'focused' | 'immersive'
export type LivingSceneMotion = 'quiet' | 'responsive' | 'active'
export type LivingSceneStarDensity = 'sparse' | 'balanced' | 'rich'
export type LivingSceneConnectionEmphasis = 'contextual' | 'active-route' | 'network'
export const GUANGHU_LIVING_INTENTS = [
  'navigate',
  'open-knowledge',
  'open-agent-workspace',
  'open-local-workspace',
  'apply-theme',
] as const
export type GuanghuLivingIntent = typeof GUANGHU_LIVING_INTENTS[number]

export type GuanghuLivingScene = {
  depth: LivingSceneDepth
  motion: LivingSceneMotion
  starDensity: LivingSceneStarDensity
  connectionEmphasis: LivingSceneConnectionEmphasis
}

export type GuanghuPersonaSystemContext = {
  humanAnchorId: 'ICE-GL∞'
  personaSystemId: 'ICE-P-ZY001'
  memoryProtocolRoot: 'REPO-012'
  modelInstanceId: string | null
}

export type GuanghuRuntimeBinding = {
  bindingId: string
  nodeId: string
  personaSystemId: 'ICE-P-ZY001'
  modelInstanceId: string
  issuedByReceiptId: string
  status: 'verified'
}

export type GuanghuKnowledgeState = {
  selectedLakeId: string | null
  mountedSources: string[]
}

export type GuanghuCapabilityId =
  | 'navigation.apply'
  | 'knowledge.open'
  | 'agent.workspace.open'
  | 'local.workspace.open'
  | 'appearance.apply'

export type GuanghuCapabilityRegistration = {
  id: GuanghuCapabilityId
  inputType: 'NavigationAction' | 'CapabilityCall'
  outputType: 'ReceiptSchema' | 'CapabilityCall'
  requiresWorldOpen: boolean
}

export type GuanghuPermissionBoundary = {
  allowedCapabilities: GuanghuCapabilityId[]
  deniedCapabilities: string[]
}

export type GuanghuResponsibilityBoundary = {
  controllerPersonaSystemId: 'ICE-P-ZY001'
  humanAnchorId: 'ICE-GL∞'
  executorRule: 'deterministic-host-only'
  successRule: 'evidence-required'
}

export type GuanghuCurrentSystemState = {
  currentRoute: GuanghuChannelRoute
  requestedRoute: GuanghuChannelRoute
  worldOpen: boolean
  receiptIds: string[]
  runtimeBinding: GuanghuRuntimeBinding | null
}

export type GuanghuLivingSystemEvent = {
  eventId: string
  intent: GuanghuLivingIntent
  currentRoute: GuanghuChannelRoute
  requestedRoute: GuanghuChannelRoute
  appearanceTheme?: string
  worldOpen: boolean
  receiptIds: string[]
  occurredAt: number
  personaSystem: GuanghuPersonaSystemContext
  currentSystemState: GuanghuCurrentSystemState
  knowledgeState: GuanghuKnowledgeState
  permissionBoundary: GuanghuPermissionBoundary
  responsibilityBoundary: GuanghuResponsibilityBoundary
  capabilityRegistry: GuanghuCapabilityRegistration[]
}

export type GuanghuUIProjection = {
  route: GuanghuChannelRoute
  scene: GuanghuLivingScene
  stateLabel: 'local-safe' | 'model-proposed' | 'server-bound'
}

export type GuanghuNavigationAction = {
  type: 'navigate'
  route: GuanghuChannelRoute
}

export type GuanghuCapabilityCall = {
  type: 'capability'
  capabilityId: GuanghuCapabilityId
  input: Record<string, unknown>
}

export type GuanghuReceiptSchema = {
  outcome: 'pending-evidence'
  requiredEvidence: string[]
}

export type GuanghuLivingSystemPlan = {
  version: typeof GUANGHU_LIVING_SYSTEM_VERSION
  eventId: string
  intent: GuanghuLivingIntent
  planId: string
  requiredTruth: string[]
  uiProjection: GuanghuUIProjection
  navigationAction: GuanghuNavigationAction
  capabilityCall: GuanghuCapabilityCall | null
  receiptSchema: GuanghuReceiptSchema
}

export type GuanghuLivingSystemExecutionReceipt = {
  version: typeof GUANGHU_LIVING_SYSTEM_VERSION
  receiptId: string
  eventId: string
  intent: GuanghuLivingIntent
  planId: string
  route: GuanghuChannelRoute
  source: 'server' | 'model' | 'fallback'
  outcome: 'executed' | 'failed'
  evidence: string[]
  completedAt: number
  error?: string
}

type CreateLivingSystemEventInput = Omit<
  GuanghuLivingSystemEvent,
  | 'occurredAt'
  | 'personaSystem'
  | 'currentSystemState'
  | 'knowledgeState'
  | 'permissionBoundary'
  | 'responsibilityBoundary'
  | 'capabilityRegistry'
> & {
  now?: number
  modelInstanceId?: string | null
  runtimeBinding?: GuanghuRuntimeBinding | null
  knowledgeState?: GuanghuKnowledgeState
}

export type LivingSystemPlanValidation =
  | { accepted: true; plan: GuanghuLivingSystemPlan }
  | {
    accepted: false
    reason:
      | 'event_mismatch'
      | 'intent_mismatch'
      | 'route_mismatch'
      | 'unverified_truth'
      | 'world_closed'
      | 'capability_mismatch'
  }

const PROTECTED_ROUTES = new Set<GuanghuChannelRoute>([
  'fifth-domain',
  'pufferfish',
  'eternal-lake-heart',
  'light-lake',
  'heartbeat-core',
  'love-core',
  'servers',
])

const SCENE_DEPTHS = new Set<LivingSceneDepth>(['overview', 'focused', 'immersive'])
const SCENE_MOTIONS = new Set<LivingSceneMotion>(['quiet', 'responsive', 'active'])
const STAR_DENSITIES = new Set<LivingSceneStarDensity>(['sparse', 'balanced', 'rich'])
const CONNECTION_EMPHASES = new Set<LivingSceneConnectionEmphasis>(['contextual', 'active-route', 'network'])
const LIVING_INTENTS = new Set<GuanghuLivingIntent>(GUANGHU_LIVING_INTENTS)
const CAPABILITY_FOR_INTENT: Record<GuanghuLivingIntent, GuanghuCapabilityId> = {
  navigate: 'navigation.apply',
  'open-knowledge': 'knowledge.open',
  'open-agent-workspace': 'agent.workspace.open',
  'open-local-workspace': 'local.workspace.open',
  'apply-theme': 'appearance.apply',
}
const CAPABILITY_REGISTRY: GuanghuCapabilityRegistration[] = [
  { id: 'navigation.apply', inputType: 'NavigationAction', outputType: 'ReceiptSchema', requiresWorldOpen: false },
  { id: 'knowledge.open', inputType: 'CapabilityCall', outputType: 'CapabilityCall', requiresWorldOpen: false },
  { id: 'agent.workspace.open', inputType: 'CapabilityCall', outputType: 'CapabilityCall', requiresWorldOpen: false },
  { id: 'local.workspace.open', inputType: 'CapabilityCall', outputType: 'CapabilityCall', requiresWorldOpen: false },
  { id: 'appearance.apply', inputType: 'CapabilityCall', outputType: 'CapabilityCall', requiresWorldOpen: false },
]

function verifiedRuntimeBinding(
  binding: GuanghuRuntimeBinding | null | undefined,
  receiptIds: string[],
): GuanghuRuntimeBinding | null {
  if (
    !binding
    || binding.status !== 'verified'
    || binding.personaSystemId !== 'ICE-P-ZY001'
    || binding.bindingId.length === 0
    || binding.nodeId.length === 0
    || binding.modelInstanceId.length === 0
    || binding.issuedByReceiptId.length === 0
    || !receiptIds.includes(binding.issuedByReceiptId)
  ) {
    return null
  }
  return { ...binding }
}

function isStringArray(value: unknown): value is string[] {
  return Array.isArray(value) && value.every(item => typeof item === 'string')
}

function isRoute(value: unknown): value is GuanghuChannelRoute {
  return typeof value === 'string' && (GUANGHU_CHANNEL_ROUTES as readonly string[]).includes(value)
}

function isLivingScene(value: unknown): value is GuanghuLivingScene {
  if (!value || typeof value !== 'object') return false
  const scene = value as Partial<GuanghuLivingScene>
  return SCENE_DEPTHS.has(scene.depth!)
    && SCENE_MOTIONS.has(scene.motion!)
    && STAR_DENSITIES.has(scene.starDensity!)
    && CONNECTION_EMPHASES.has(scene.connectionEmphasis!)
}

function isCapabilityCall(value: unknown): value is GuanghuCapabilityCall | null {
  if (value === null) return true
  if (!value || typeof value !== 'object') return false
  const call = value as Partial<GuanghuCapabilityCall>
  return call.type === 'capability'
    && Object.values(CAPABILITY_FOR_INTENT).includes(call.capabilityId!)
    && Boolean(call.input)
    && typeof call.input === 'object'
    && !Array.isArray(call.input)
}

function isLivingSystemPlan(value: unknown): value is GuanghuLivingSystemPlan {
  if (!value || typeof value !== 'object') return false
  const candidate = value as Partial<GuanghuLivingSystemPlan>
  const projection = candidate.uiProjection
  const navigation = candidate.navigationAction
  const receipt = candidate.receiptSchema
  return candidate.version === GUANGHU_LIVING_SYSTEM_VERSION
    && typeof candidate.eventId === 'string'
    && candidate.eventId.length > 0
    && LIVING_INTENTS.has(candidate.intent!)
    && typeof candidate.planId === 'string'
    && candidate.planId.length > 0
    && isStringArray(candidate.requiredTruth)
    && Boolean(projection)
    && isRoute(projection!.route)
    && isLivingScene(projection!.scene)
    && ['local-safe', 'model-proposed', 'server-bound'].includes(projection!.stateLabel)
    && Boolean(navigation)
    && navigation!.type === 'navigate'
    && isRoute(navigation!.route)
    && isCapabilityCall(candidate.capabilityCall)
    && Boolean(receipt)
    && receipt!.outcome === 'pending-evidence'
    && isStringArray(receipt!.requiredEvidence)
}

export function createLivingSystemEvent(input: CreateLivingSystemEventInput): GuanghuLivingSystemEvent {
  const runtimeBinding = verifiedRuntimeBinding(input.runtimeBinding, input.receiptIds)
  const allowedCapabilities = CAPABILITY_REGISTRY
    .filter(capability => !capability.requiresWorldOpen || input.worldOpen)
    .map(capability => capability.id)
  const receiptIds = [...input.receiptIds]
  return {
    eventId: input.eventId,
    intent: input.intent,
    currentRoute: input.currentRoute,
    requestedRoute: input.requestedRoute,
    ...(input.appearanceTheme ? { appearanceTheme: input.appearanceTheme } : {}),
    worldOpen: input.worldOpen,
    receiptIds,
    occurredAt: input.now ?? Date.now(),
    personaSystem: {
      humanAnchorId: 'ICE-GL∞',
      personaSystemId: 'ICE-P-ZY001',
      memoryProtocolRoot: 'REPO-012',
      modelInstanceId: input.modelInstanceId ?? runtimeBinding?.modelInstanceId ?? null,
    },
    currentSystemState: {
      currentRoute: input.currentRoute,
      requestedRoute: input.requestedRoute,
      worldOpen: input.worldOpen,
      receiptIds,
      runtimeBinding,
    },
    knowledgeState: input.knowledgeState ?? {
      selectedLakeId: null,
      mountedSources: [],
    },
    permissionBoundary: {
      allowedCapabilities,
      deniedCapabilities: [],
    },
    responsibilityBoundary: {
      controllerPersonaSystemId: 'ICE-P-ZY001',
      humanAnchorId: 'ICE-GL∞',
      executorRule: 'deterministic-host-only',
      successRule: 'evidence-required',
    },
    capabilityRegistry: CAPABILITY_REGISTRY.map(capability => ({ ...capability })),
  }
}

export function parseLivingSystemPlan(output: string): GuanghuLivingSystemPlan | null {
  try {
    const parsed: unknown = JSON.parse(output.trim())
    return isLivingSystemPlan(parsed) ? parsed : null
  } catch {
    return null
  }
}

export function validateLivingSystemPlan(
  event: GuanghuLivingSystemEvent,
  plan: GuanghuLivingSystemPlan | null,
): LivingSystemPlanValidation {
  if (!plan || plan.eventId !== event.eventId) return { accepted: false, reason: 'event_mismatch' }
  if (plan.intent !== event.intent) return { accepted: false, reason: 'intent_mismatch' }
  if (
    plan.uiProjection.route !== plan.navigationAction.route
    || (
      plan.uiProjection.route !== event.requestedRoute
      && plan.uiProjection.route !== 'world-login'
    )
  ) {
    return { accepted: false, reason: 'route_mismatch' }
  }
  const suppliedTruth = new Set(event.receiptIds)
  if (plan.requiredTruth.some(receiptId => !suppliedTruth.has(receiptId))) {
    return { accepted: false, reason: 'unverified_truth' }
  }
  if (!event.worldOpen && PROTECTED_ROUTES.has(plan.uiProjection.route)) {
    return { accepted: false, reason: 'world_closed' }
  }
  const expectedCapability = CAPABILITY_FOR_INTENT[event.intent]
  if (
    !event.permissionBoundary.allowedCapabilities.includes(expectedCapability)
    || (
      event.intent === 'navigate'
        ? plan.capabilityCall !== null
        : plan.capabilityCall?.capabilityId !== expectedCapability
    )
  ) {
    return { accepted: false, reason: 'capability_mismatch' }
  }
  return { accepted: true, plan }
}

export function createDeterministicLivingSystemPlan(
  event: GuanghuLivingSystemEvent,
): GuanghuLivingSystemPlan {
  const route = !event.worldOpen && PROTECTED_ROUTES.has(event.requestedRoute)
    ? 'world-login'
    : event.requestedRoute
  const immersive = event.worldOpen && route !== 'world' && route !== 'world-login'
  const capabilityId = CAPABILITY_FOR_INTENT[event.intent]
  return {
    version: GUANGHU_LIVING_SYSTEM_VERSION,
    eventId: event.eventId,
    intent: event.intent,
    planId: `fallback-${event.eventId}`,
    requiredTruth: [],
    uiProjection: {
      route,
      stateLabel: 'local-safe',
      scene: {
        depth: immersive ? 'immersive' : route === 'world' ? 'overview' : 'focused',
        motion: route === 'world' ? 'quiet' : 'responsive',
        starDensity: immersive ? 'rich' : 'balanced',
        connectionEmphasis: immersive ? 'active-route' : 'contextual',
      },
    },
    navigationAction: { type: 'navigate', route },
    capabilityCall: event.intent === 'navigate'
      ? null
      : {
        type: 'capability',
        capabilityId,
        input: {
          ...(event.appearanceTheme ? { appearanceTheme: event.appearanceTheme } : {}),
          requestedRoute: route,
        },
      },
    receiptSchema: {
      outcome: 'pending-evidence',
      requiredEvidence: event.intent === 'navigate'
        ? ['ui.route.readback']
        : [`capability.${capabilityId}.result`],
    },
  }
}

export function createLivingSystemExecutionReceipt({
  plan,
  source,
  outcome,
  evidence,
  error,
  now = Date.now(),
}: {
  plan: GuanghuLivingSystemPlan
  source: GuanghuLivingSystemExecutionReceipt['source']
  outcome: GuanghuLivingSystemExecutionReceipt['outcome']
  evidence: string[]
  error?: string
  now?: number
}): GuanghuLivingSystemExecutionReceipt {
  if (outcome === 'executed' && evidence.length === 0) {
    throw new Error('guanghu_living_system_success_evidence_required')
  }
  return {
    version: GUANGHU_LIVING_SYSTEM_VERSION,
    receiptId: `local-execution:${plan.planId}:${outcome}`,
    eventId: plan.eventId,
    intent: plan.intent,
    planId: plan.planId,
    route: plan.uiProjection.route,
    source,
    outcome,
    evidence: [...evidence],
    completedAt: now,
    ...(error ? { error } : {}),
  }
}