import { randomBytesHex } from "../utils/random.js";

const mockStorage = new Map<string, unknown>();

/**
 * Extracts file contents from FormData and stores it as JSON
 * @returns The storage key with filename if present
 */
export async function addToMockStorage(value: FormData): Promise<string[]> {
  const key = randomBytesHex();

  // Get the first file from FormData
  const files = value.getAll("file") as File[];
  if (!files) {
    throw new Error("No file found in FormData");
  }

  // Read file contents
  return Promise.all(
    files.map(async (file) => {
      const text = await file.text();
      let data: unknown;

      try {
        // Parse the contents as JSON
        data = JSON.parse(text);
      } catch {
        throw new Error("File contents must be valid JSON");
      }

      // If file has a name, return key/filename format
      const filename =
        "name" in file && file.name ? file.name.replace("files/", "") : "";

      //   console.log("mockStorage upload", key, data, filename);

      const hash = `${key}${filename ? `/${filename}` : ""}`;
      mockStorage.set(hash, data);
      return `ipfs://${hash}`;
    }),
  );
}

/**
 * Retrieves parsed JSON data from storage
 * @returns The parsed data object or undefined if not found
 */
export function getFromMockStorage(key: string): unknown {
  const data = mockStorage.get(key);
  //   console.log("mockStorage get", key, data);
  return data;
}