export type SamplingOpts = {
  num_chains: number;
  num_warmup: number;
  num_samples: number;
  init_radius: number;
  seed: number | undefined;
};

export const defaultSamplingOpts: SamplingOpts = {
  num_chains: 4,
  num_warmup: 1000,
  num_samples: 1000,
  init_radius: 2.0,
  seed: undefined,
};

export type ChainProgress = {
  iteration: number;
  totalIterations: number;
  warmup: boolean;
};

// Result of one chain (one wasm-exec job)
export type ChainResult = {
  chainId: number;
  paramNames: string[];
  draws: number[][]; // draws[paramIndex][drawIndex]
  consoleText: string;
};

export type MultiChainResult = {
  paramNames: string[];
  draws: number[][]; // draws[paramIndex][drawIndex], chains concatenated
  numChains: number;
  computeTimeSec: number;
  consoleText: string;
};

export type ChainStatus = ChainProgress | "done" | "error";

export type ChainStatusMap = {
  [chainId: number]: ChainStatus;
};