import type { CTPDocument } from '@/lib/ctp/schema';

export interface AnalysisInput {
  bpm: number;
  duration: number;       // seconds
  title?: string;
  artist?: string;
  mbid?: string | null;
  contributed_by: string;
  ollamaModel?: string;   // required when provider id is "ollama"
  confirmedBpm?: number | null;        // from MusicBrainz tags or other reliable source
  confirmedTimeSigNum?: number | null; // time signature numerator if confirmed
}

export interface ProviderInfo {
  id: string;
  label: string;
  type: 'cloud-ai' | 'local-ai' | 'algorithmic';
  available: boolean;
  unavailableReason?: string;   // present only when available === false
  ollamaBaseUrl?: string;       // present only for the ollama provider
}

export interface AnalysisProvider {
  id: string;
  label: string;
  type: 'cloud-ai' | 'local-ai' | 'algorithmic';
  /** Returns true if this provider is configured and reachable. Must not throw. */
  isAvailable(): Promise<{ available: boolean; reason?: string }>;
  generateCTP(input: AnalysisInput): Promise<CTPDocument>;
}