export type ConversationThinkingLevel = 'off' | 'minimal' | 'low' | 'medium' | 'high';

export interface ProductModelRef {
  accountId: string;
  modelId: string;
  thinkingLevel: ConversationThinkingLevel;
}

export interface ConversationModelState {
  model: ProductModelRef | null;
  modelResolution: 'resolved' | 'required';
}

export interface PublicUsage {
  inputTokens: number;
  outputTokens: number;
  cacheReadTokens?: number;
  cacheWriteTokens?: number;
}

export type CodingRuntimeErrorCode =
  | 'CODING_RUNTIME_START_FAILED'
  | 'CODING_RUNTIME_READY_TIMEOUT'
  | 'CODING_RUNTIME_PROTOCOL_ERROR'
  | 'CODING_PROVIDER_AUTH_REQUIRED'
  | 'CODING_MODEL_UNAVAILABLE'
  | 'CODING_SESSION_UNREADABLE'
  | 'CODING_STORAGE_WRITE_FAILED'
  | 'CODING_REQUEST_UNCERTAIN'
  | 'CODING_MIGRATION_MODEL_REQUIRED'
  | 'CODING_CONVERSATION_NOT_FOUND';

export interface CodingRuntimePublicError {
  code: CodingRuntimeErrorCode;
  message: string;
  recoverable: boolean;
}

export type ConversationRunStatus =
  | 'idle'
  | 'preparing'
  | 'queued'
  | 'running'
  | 'retrying'
  | 'compacting'
  | 'aborting'
  | 'error';

export type PromptMode = 'prompt' | 'steer' | 'follow-up';

export interface ConversationRunState {
  status: ConversationRunStatus;
  runId?: string;
  mode?: PromptMode;
  startedAt?: number;
  settledAt?: number;
  terminalReason?: 'completed' | 'aborted' | 'failed';
  retry?: {
    attempt: number;
    delayMs: number;
  };
  error?: CodingRuntimePublicError;
}

export interface ConversationQueueItem {
  id: string;
  clientRequestId: string;
  mode: 'steer' | 'follow-up';
  text: string;
  attachmentIds: string[];
}

export interface ConversationQueueState {
  items: ConversationQueueItem[];
}

export interface ConversationContextState {
  usedTokens: number;
  contextWindow: number;
  outputLimit?: number;
  compaction: 'idle' | 'running';
  lastCompactionId?: string;
  recalculating?: boolean;
}

export interface ConversationInteractionOption {
  id: string;
  label: string;
  description?: string;
}

export interface ConversationInteraction {
  id: string;
  conversationId: string;
  runId: string;
  kind: 'select' | 'confirm' | 'input' | 'editor';
  title: string;
  message?: string;
  options?: ConversationInteractionOption[];
  status: 'pending' | 'answered' | 'rejected' | 'cancelled';
}

export interface PublicWorkerState {
  status: 'stopped' | 'starting' | 'ready' | 'recovering' | 'error';
  generation: number;
  error?: CodingRuntimePublicError;
}

export type ConversationContentBlock =
  | {
    kind: 'text';
    id: string;
    text: string;
    status: 'streaming' | 'complete';
  }
  | {
    kind: 'thinking';
    id: string;
    text: string;
    status: 'streaming' | 'complete';
  }
  | {
    kind: 'image';
    id: string;
    attachmentId: string;
    mime: string;
  };

export interface ConversationMessageNode {
  kind: 'message';
  id: string;
  sourceEntryId?: string;
  clientRequestId?: string;
  role: 'user' | 'assistant';
  status: 'optimistic' | 'streaming' | 'complete' | 'error' | 'aborted';
  blocks: ConversationContentBlock[];
  usage?: PublicUsage;
  stopReason?: 'stop' | 'length' | 'tool-use' | 'error' | 'aborted';
}

export interface ChangedFileDetailsV1 {
  schema: 'changed-file.v1';
  paths: string[];
}

export interface TaskStateDetailsV1 {
  schema: 'task-state.v1';
  tasks: Array<{
    id: string;
    title: string;
    status: 'pending' | 'running' | 'complete' | 'error';
  }>;
}

export interface WriteLeaseDetailsV1 {
  schema: 'write-lease.v1';
  status: 'waiting' | 'held' | 'released';
}

export interface AgentBrowserDetailsV1 {
  schema: 'agent-browser.v1';
  action: 'open' | 'status' | 'close' | 'reset_profile' | 'navigate' | 'send_cdp' | 'read_events' | 'read_payload';
  attachmentId?: string;
  mime?: string;
}

export interface GameAssetsDetailsV1 {
  schema: 'game-assets.v1';
  invocationId: string;
  candidateIds: string[];
  status: 'pending' | 'resolved';
  pendingAssetIds: string[];
  approvedAssetIds: string[];
  discardedAssetIds: string[];
}

export interface RuntimeContextDetailsV1 {
  schema: 'runtime-context.v1';
  skills: Array<{
    id: string;
    name: string;
    description: string;
    selected: boolean;
  }>;
  commands: Array<{
    name: string;
    title: string;
    description: string;
    source: 'makelore' | 'pi' | 'skill';
    skillId?: string;
  }>;
}

export interface SubagentDetailsV1 {
  schema: 'subagent.v1';
  dispatchId: string;
  mode: 'single' | 'parallel' | 'chain';
  tasks: Array<{
    taskId: string;
    agentId: string;
    toolProfile: 'read-only' | 'coding';
    status: 'queued' | 'running' | 'complete' | 'error' | 'aborted' | 'skipped';
    summary?: string;
    errorCode?: string;
    usage?: PublicUsage;
  }>;
}

export type KnownToolDetails =
  | ChangedFileDetailsV1
  | TaskStateDetailsV1
  | WriteLeaseDetailsV1
  | AgentBrowserDetailsV1
  | GameAssetsDetailsV1
  | RuntimeContextDetailsV1
  | SubagentDetailsV1;

export interface ConversationToolNode {
  kind: 'tool';
  id: string;
  toolCallId: string;
  toolName: string;
  title: string;
  inputText: string;
  status: 'declared' | 'waiting' | 'running' | 'complete' | 'error' | 'aborted';
  output: ConversationContentBlock[];
  details?: KnownToolDetails;
}

export interface ConversationCompactionNode {
  kind: 'compaction';
  id: string;
  runId: string;
  source: 'manual' | 'automatic';
  status: 'running' | 'complete' | 'error';
  willRetry: boolean;
  summary?: string;
}

export interface ConversationBoundaryNode {
  kind: 'boundary';
  id: string;
  runId: string;
  boundary: 'turn-start' | 'turn-end' | 'retry';
  attempt?: number;
  delayMs?: number;
}

export interface ConversationSubagentNode {
  kind: 'subagent';
  id: string;
  runId: string;
  details: SubagentDetailsV1;
}

export interface ConversationNoticeNode {
  kind: 'notice';
  id: string;
  code: string;
  level: 'info' | 'warning' | 'error';
  message: string;
}

export type ConversationNode =
  | ConversationMessageNode
  | ConversationToolNode
  | ConversationCompactionNode
  | ConversationBoundaryNode
  | ConversationSubagentNode
  | ConversationNoticeNode;

export interface ConversationSnapshot {
  schemaVersion: 1;
  conversation: {
    id: string;
    projectId: string;
    agentId: string;
    title: string;
    model: ConversationModelState;
  };
  nodes: ConversationNode[];
  run: ConversationRunState;
  queue: ConversationQueueState;
  context: ConversationContextState;
  pendingInteractions: ConversationInteraction[];
  worker: PublicWorkerState;
  cursor: {
    workerGeneration: number;
    seq: number;
    leafEntryId?: string;
  };
}

export type ConversationPatch =
  | { op: 'worker.state'; state: PublicWorkerState }
  | { op: 'run.state'; run: ConversationRunState }
  | { op: 'message.upsert'; node: ConversationMessageNode }
  | { op: 'message.block-delta'; messageId: string; blockId: string; delta: string }
  | { op: 'tool.upsert'; node: ConversationToolNode }
  | { op: 'compaction.upsert'; node: ConversationCompactionNode }
  | { op: 'boundary.upsert'; node: ConversationBoundaryNode }
  | { op: 'subagent.upsert'; node: ConversationSubagentNode }
  | { op: 'queue.replace'; queue: ConversationQueueState }
  | { op: 'interaction.upsert'; interaction: ConversationInteraction }
  | { op: 'interaction.remove'; interactionId: string }
  | { op: 'context.replace'; context: ConversationContextState }
  | { op: 'snapshot.invalidated'; reason: string };

export interface ConversationPatchEnvelope {
  conversationId: string;
  workerGeneration: number;
  runId?: string;
  seq: number;
  at: number;
  patch: ConversationPatch;
}

export interface PrepareConversationInput {
  conversationId: string;
  projectId: string;
  agentId: string;
  title: string;
  model: ConversationModelState;
}

export interface ConversationRuntimeState {
  conversationId: string;
  status: PublicWorkerState['status'];
  workerGeneration: number;
  error?: CodingRuntimePublicError;
}

export interface PromptConversationInput {
  clientRequestId: string;
  conversationId: string;
  mode: PromptMode;
  text: string;
  attachments: Array<{ attachmentId: string }>;
}

export interface QueueMessageInput {
  clientRequestId: string;
  conversationId: string;
  text: string;
  attachments: Array<{ attachmentId: string }>;
}

export interface PromptAcceptance {
  accepted: true;
  conversationId: string;
  clientRequestId: string;
  runId: string;
  mode: PromptMode;
  queuePosition?: number;
}

export interface QueueAcceptance {
  accepted: true;
  conversationId: string;
  clientRequestId: string;
  mode: 'steer' | 'follow-up';
  queuePosition: number;
}

export interface SetConversationModelInput {
  conversationId: string;
  accountId: string;
  modelId: string;
}

export interface SetThinkingLevelInput {
  conversationId: string;
  thinkingLevel: ConversationThinkingLevel;
}

export interface ForkConversationInput {
  sourceConversationId: string;
  sourceEntryId?: string;
  conversation: PrepareConversationInput;
}

export interface ForkResult {
  conversationId: string;
  snapshot: ConversationSnapshot;
}

export interface CodingConversationRuntime {
  prepare(input: PrepareConversationInput): Promise<ConversationRuntimeState>;
  getSnapshot(conversationId: string): Promise<ConversationSnapshot>;
  prompt(input: PromptConversationInput): Promise<PromptAcceptance>;
  steer(input: QueueMessageInput): Promise<QueueAcceptance>;
  followUp(input: QueueMessageInput): Promise<QueueAcceptance>;
  abort(conversationId: string): Promise<void>;
  setModel(input: SetConversationModelInput): Promise<ConversationModelState>;
  setThinking(input: SetThinkingLevelInput): Promise<ConversationModelState>;
  compact(conversationId: string): Promise<void>;
  fork(input: ForkConversationInput): Promise<ForkResult>;
  recover(conversationId: string): Promise<ConversationRuntimeState>;
  dispose(conversationId: string): Promise<void>;
  subscribe(listener: (patch: ConversationPatchEnvelope) => void): () => void;
}