/**
 * Fetch assets by owner using the Helius Digital Asset Standard (DAS) API
 * @param agent SolanaAgentKit instance
 * @param ownerPublicKey Owner's Solana wallet PublicKey
 * @param limit Number of assets to retrieve per request
 * @returns Assets owned by the specified address
 */
export async function getAssetsByOwner(agent, ownerPublicKey, limit) {
  try {
    const apiKey = agent.config.HELIUS_API_KEY
    if (!apiKey) {
      throw new Error("HELIUS_API_KEY not found in environment variables")
    }

    const url = `https://mainnet.helius-rpc.com/?api-key=${apiKey}`

    const response = await fetch(url, {
      method: "POST",
      headers: {
        "Content-Type": "application/json"
      },
      body: JSON.stringify({
        jsonrpc: "2.0",
        id: "get-assets",
        method: "getAssetsByOwner",
        params: {
          ownerAddress: ownerPublicKey.toString(),
          page: 1,
          limit: limit,
          displayOptions: {
            showFungible: true
          }
        }
      })
    })

    if (!response.ok) {
      throw new Error(
        `Failed to fetch: ${response.status} - ${response.statusText}`
      )
    }

    const data = await response.json()

    return data.result.items
  } catch (error) {
    console.error("Error retrieving assets: ", error.message)
    throw new Error(`Assets retrieval failed: ${error.message}`)
  }
}