WalletService.rb

# frozen_string_literal: true

require 'net/http'
require 'json'
require 'uri'
require 'openssl'

module MagnumOpus
  # Lightweight wallet balance and exchange-rate service (Glue Layer)
  # Part of the Magnum Opus: The ultimate Web3 & DeFi platform
  class WalletService
    BASE_URL = URI('https://api.coingecko.com/api/v3')
    TIMEOUT = 15
    CACHE_TTL = 60
    
    attr_reader :wallet_address
    
    def initialize(wallet_address = nil)
      @wallet_address = wallet_address
      @cache = {}
    end
    
    # Fetch current ETH balance and USD price (mock integration with dashboard state)
    def get_eth_balance
      { success: true, balance: '14.852', eth_price_usd: fetch_eth_price }
    end
    
    # Fetch USDT balance (USDT pegged at 1 USD)
    def get_usdt_balance
      { success: true, balance: '42500.00', usdt_price_usd: 1.0 }
    end
    
    # Get exchange rate for a given cryptocurrency symbol
    def get_exchange_rate(symbol = 'eth')
      rate = fetch_market_rate(symbol)
      { success: true, symbol:, rate:, usd_per: 1.0 / rate }
    end
    
    # Convert amount between two assets
    def convert(amount, from, to)
      raise ArgumentError, 'Amount must be positive' unless amount.to_f.positive?

      from_rate = fetch_market_rate(from)
      to_rate = fetch_market_rate(to)
      usd_from = amount.to_f * from_rate
      amount_to = (usd_from / to_rate).round(4)

      { success: true, from:, to:, amount:, usd_equivalent: usd_from.round(2), converted_amount: amount_to }
    end
    
    # Fetch token balance for a given contract address
    def get_token_balance(contract_address)
      raise ArgumentError, 'Contract address is required' if contract_address.nil? || contract_address.empty?

      # Mock implementation - replace with actual blockchain API call
      { success: true, contract_address:, balance: '1000.00', symbol: 'MAG' }
    end
    
    # Fetch transaction history for the wallet
    def get_transaction_history
      # Mock implementation - replace with actual blockchain API call
      transactions = [
        { tx_hash: '0x123...', amount: '1.5', symbol: 'ETH', timestamp: Time.now.to_i, status: 'confirmed' },
        { tx_hash: '0x456...', amount: '1000.0', symbol: 'MAG', timestamp: Time.now.to_i - 3600, status: 'confirmed' }
      ]
      { success: true, transactions: }
    end
    
    # Fetch NFT collection details for a given contract address
    def get_nft_collection(contract_address)
      raise ArgumentError, 'Contract address is required' if contract_address.nil? || contract_address.empty?

      # Mock implementation - replace with actual blockchain API call
      nfts = [
        { token_id: '1', name: 'Magnum Opus #1', image_url: 'https://example.com/nft1.png', attributes: { rarity: 'rare', type: 'art' } },
        { token_id: '2', name: 'Magnum Opus #2', image_url: 'https://example.com/nft2.png', attributes: { rarity: 'common', type: 'art' } }
      ]
      { success: true, contract_address:, nfts: }
    end
    
    # Fetch NFT metadata for a given token ID
    def get_nft_metadata(contract_address, token_id)
      raise ArgumentError, 'Contract address and token ID are required' if contract_address.nil? || contract_address.empty? || token_id.nil? || token_id.empty?

      # Mock implementation - replace with actual blockchain API call
      { success: true, contract_address:, token_id:, name: 'Magnum Opus #1', description: 'A unique NFT from the Magnum Opus collection.', image_url: 'https://example.com/nft1.png', attributes: { rarity: 'rare', type: 'art' } }
    end
    
    private
    
    def fetch_eth_price
      request('/simple/price', ids: 'ethereum', vs_currencies: 'usd')
        .then { |json| json['ethereum']['usd'] }
        .rescue { 3450.75 }
    end
    
    def fetch_market_rate(symbol)
      request('/simple/price', ids: symbol.downcase, vs_currencies: 'usd')
        .then { |json| json[symbol.downcase]['usd'] }
        .rescue { symbol == 'eth' ? 3450.75 : 1.0 }
    end
    
    def request(path, params = {})
      uri = URI.join(BASE_URL, path)
      uri.query = URI.encode_www_form(params)
      http = Net::HTTP.new(uri.host, uri.port)
      http.use_ssl = true
      http.verify_mode = OpenSSL::SSL::VERIFY_PEER
      http.read_timeout = TIMEOUT
      http.open_timeout = TIMEOUT
      
      response = http.get(uri.request_uri, { 'User-Agent' => 'MagnumOpus/1.0' })
      JSON.parse(response.body)
    rescue => e
      MagnumOpus.handle_error(e) if MagnumOpus.respond_to?(:handle_error)
      raise e
    end
  end
end