import type {
  AgentRuntimeConfig,
  WorkflowRun,
  StepRun,
  WorkflowDefinition,
  ApprovalRequest,
  CostSummary,
} from '@stevora/sdk';

interface AgentRuntimeConfig {
  apiKey: string;
  baseUrl?: string;   // default: 'http://localhost:3000'
  timeout?: number;    // default: 30000 (ms)
}

interface WorkflowRun {
  id: string;
  workspaceId: string;
  definitionId: string;
  status: WorkflowRunStatus;
  currentStepName: string | null;
  input: Record<string, unknown>;
  state: Record<string, unknown>;
  output: Record<string, unknown> | null;
  error: Record<string, unknown> | null;
  totalCostCents: number;
  startedAt: string | null;
  completedAt: string | null;
  failedAt: string | null;
  cancelledAt: string | null;
  nextRunAt: string | null;
  idempotencyKey: string | null;
  version: number;
  createdAt: string;
  updatedAt: string;
  stepRuns?: StepRun[];
  definition?: { name: string; version: string };
}

type WorkflowRunStatus =
  | 'PENDING'
  | 'RUNNING'
  | 'WAITING'
  | 'PAUSED'
  | 'COMPLETED'
  | 'FAILED'
  | 'CANCELLED';

interface StepRun {
  id: string;
  workflowRunId: string;
  stepName: string;
  stepType: StepType;
  status: StepRunStatus;
  attemptCount: number;
  maxAttempts: number;
  lastError: Record<string, unknown> | null;
  input: unknown;
  output: unknown;
  startedAt: string | null;
  completedAt: string | null;
  nextRetryAt: string | null;
  createdAt: string;
  updatedAt: string;
}

type StepRunStatus =
  | 'PENDING'
  | 'RUNNING'
  | 'WAITING'
  | 'COMPLETED'
  | 'FAILED'
  | 'SKIPPED'
  | 'CANCELLED';

type StepType = 'TASK' | 'WAIT' | 'CONDITION' | 'EXTERNAL_EVENT' | 'LLM' | 'APPROVAL';

interface WorkflowDefinition {
  id: string;
  workspaceId: string | null;
  name: string;
  version: string;
  description: string | null;
  stepsJson: unknown[];
  isActive: boolean;
  createdAt: string;
  updatedAt: string;
}

interface CreateDefinitionInput {
  name: string;
  version: string;
  description?: string;
  steps: Record<string, unknown>[];
}

interface ApprovalRequest {
  id: string;
  stepRunId: string;
  workflowRunId: string;
  workspaceId: string;
  content: unknown;
  metadata: Record<string, unknown> | null;
  decision: string | null;
  decidedBy: string | null;
  editedContent: unknown;
  decidedAt: string | null;
  expiresAt: string | null;
  createdAt: string;
}

interface DecideApprovalInput {
  decision: 'approved' | 'rejected' | 'edited';
  editedContent?: Record<string, unknown>;
  decidedBy?: string;
}

interface RunCost {
  totalCostCents: number;
  totalCostDollars: string;
  calls: LlmCall[];
}

interface CostSummary {
  totalCostCents: number;
  totalCostDollars: string;
  totalCalls: number;
  totalInputTokens: number;
  totalOutputTokens: number;
  byModel: {
    model: string;
    calls: number;
    costCents: number;
    inputTokens: number;
    outputTokens: number;
  }[];
}

interface LlmCall {
  id: string;
  model: string;
  provider: string;
  inputTokens: number | null;
  outputTokens: number | null;
  costCents: number | null;
  durationMs: number | null;
  status: string;
  attempt: number;
  createdAt: string;
  toolTraces?: ToolTrace[];
}

interface ToolTrace {
  id: string;
  toolName: string;
  inputJson: unknown;
  outputJson: unknown;
  durationMs: number | null;
  status: string;
  sequence: number;
}

interface PaginationMeta {
  page: number;
  pageSize: number;
  total: number;
  totalPages: number;
}

interface ApiResponse<T> {
  success: boolean;
  data?: T;
  error?: { code: string; message: string; details?: unknown };
  meta?: PaginationMeta;
}

interface CreateRunInput {
  definitionId: string;
  input?: Record<string, unknown>;
  idempotencyKey?: string;
}

interface ListRunsParams {
  page?: number;
  pageSize?: number;
  status?: WorkflowRunStatus;
  definitionId?: string;
}

interface ResumeRunInput {
  signalType: string;
  payload?: Record<string, unknown>;
}

interface WorkflowEvent {
  id: string;
  workflowRunId: string;
  stepRunId: string | null;
  eventType: string;
  payload: Record<string, unknown>;
  createdAt: string;
}