export type SeedreamLayerBox = [number, number, number, number];

export type SeedreamLayerSource = "provider" | "upload" | "library" | "seedream-edit";

export type SeedreamCompositionLayer = {
  id: string;
  assetId: string;
  name: string;
  description?: string;
  visible: boolean;
  box: SeedreamLayerBox;
  rotation: number;
  source: SeedreamLayerSource;
  editJobId?: string;
  originalAssetId?: string;
};

export type SeedreamLayerComposition = {
  jobId: string;
  baseAssetId: string;
  baseVisible: boolean;
  layers: SeedreamCompositionLayer[];
  version: number;
  createdAt: string;
  updatedAt: string;
};

export type SeedreamLayerDraft = Pick<SeedreamLayerComposition, "baseAssetId" | "baseVisible" | "layers">;

export function hasCompleteSeedreamLayerMetadata(records: unknown[], outputCount: number): boolean {
  if (!Number.isInteger(outputCount) || outputCount < 2 || records.length !== outputCount) return false;
  const indices = records.map((value) => {
    if (!value || typeof value !== "object" || Array.isArray(value)) return undefined;
    const raw = (value as Record<string, unknown>).z_index;
    const index = typeof raw === "number" ? raw : typeof raw === "string" && raw.trim() ? Number(raw) : Number.NaN;
    return Number.isInteger(index) && index >= 0 ? index : undefined;
  });
  if (indices.some((index) => index === undefined)) return false;
  const numericIndices = indices as number[];
  return numericIndices.includes(0) && new Set(numericIndices).size === numericIndices.length;
}