const fallbackDashboard = {
  active_account: {
    name: 'Main Wallet',
    address: '0x1111111111111111111111111111111111111111',
    source: 'SeedPhrase'
  },
  chains: [
    { id: 1, name: 'Ethereum' },
    { id: 8453, name: 'Base' }
  ],
  balances: [
    { chain_id: 1, symbol: 'ETH', amount: 1.24, usd_value: 4200 },
    { chain_id: 8453, symbol: 'USDC', amount: 1280, usd_value: 1280 }
  ],
  approvals: [
    { chain_id: 1, asset_symbol: 'USDC', spender: '0x2222222222222222222222222222222222222222', allowance: 'unlimited', risk: 'High' }
  ],
  activities: [
    { label: 'Swap ETH → USDC', status: 'Confirmed', chain_id: 1 }
  ],
  settings: {
    theme: 'System',
    language: 'en',
    currency: 'USD',
    auto_lock_minutes: 15,
    prefer_rabby_over_metamask: true
  }
};

const fallbackFeatures = [
  ['Create/unlock wallet', 'Password, lock/unlock, encrypted local state', 'Modeled'],
  ['Import/create accounts', 'Seed phrase, private key, JSON, watch-only', 'Modeled'],
  ['Multi-chain networks', 'Built-in, custom RPC, testnet, offline chain flags', 'Modeled'],
  ['Portfolio dashboard', 'Balances, NFTs, DeFi positions, activity', 'UiPrototype'],
  ['Dapp provider and permissions', 'Origin/account/chain permissions', 'Modeled'],
  ['Signing and security previews', 'Typed data/message/transaction previews and risk', 'Modeled'],
  ['Settings and customization', 'Theme, language, currency, auto-lock, default wallet mode', 'UiPrototype']
];

function money(value) {
  return new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' }).format(value || 0);
}

function shortAddress(address) {
  if (!address || address.length < 12) return address || '';
  return `${address.slice(0, 6)}…${address.slice(-4)}`;
}

function statusLabel(value) {
  if (typeof value === 'string') return value;
  if (value && typeof value === 'object') return Object.keys(value)[0] || 'Modeled';
  return 'Modeled';
}

async function invokeOrFallback(command, fallback) {
  try {
    const tauri = window.__TAURI__?.core;
    if (!tauri) return fallback;
    return await tauri.invoke(command);
  } catch (_) {
    return fallback;
  }
}

function renderDashboard(dashboard) {
  const total = dashboard.balances.reduce((sum, token) => sum + token.usd_value, 0);
  const highRisk = dashboard.approvals.filter((approval) => ['High', 'Critical'].includes(statusLabel(approval.risk))).length;

  document.getElementById('account-address').textContent = shortAddress(dashboard.active_account.address);
  document.getElementById('portfolio-total').textContent = money(total);
  document.getElementById('hero-total').textContent = money(total);
  document.getElementById('chain-count').textContent = dashboard.chains.length;
  document.getElementById('risk-count').textContent = highRisk;
  document.getElementById('approval-risk').textContent = highRisk;

  document.getElementById('token-list').innerHTML = dashboard.balances.map((token) => `
    <div class="asset-row">
      <div class="coin-mark">${token.symbol.slice(0, 1)}</div>
      <div><strong>${token.symbol}</strong><span>Chain ${token.chain_id}</span></div>
      <div class="asset-value"><strong>${money(token.usd_value)}</strong><span>${token.amount}</span></div>
    </div>
  `).join('');

  document.getElementById('approval-list').innerHTML = dashboard.approvals.map((approval) => `
    <div class="approval-row">
      <div><strong>${approval.asset_symbol} allowance</strong><span>${shortAddress(approval.spender)}</span></div>
      <span class="risk ${statusLabel(approval.risk).toLowerCase()}">${statusLabel(approval.risk)}</span>
    </div>
  `).join('');

  document.getElementById('activity-list').innerHTML = dashboard.activities.map((activity) => `
    <div class="activity-row"><span>↗</span><div><strong>${activity.label}</strong><small>${statusLabel(activity.status)} · Chain ${activity.chain_id}</small></div></div>
  `).join('');

  const settings = dashboard.settings;
  document.getElementById('settings-summary').innerHTML = [
    ['Theme', statusLabel(settings.theme)],
    ['Language', settings.language],
    ['Currency', settings.currency],
    ['Auto-lock', `${settings.auto_lock_minutes} min`],
    ['Default wallet', settings.prefer_rabby_over_metamask ? 'Rabby' : 'Browser default']
  ].map(([label, value]) => `<div><span>${label}</span><strong>${value}</strong></div>`).join('');
}

function renderFeatures(features) {
  document.getElementById('wallet-features').innerHTML = features.map((feature) => {
    const title = Array.isArray(feature) ? feature[0] : feature.feature;
    const acceptance = Array.isArray(feature) ? feature[1] : feature.acceptance;
    const status = Array.isArray(feature) ? feature[2] : statusLabel(feature.status);
    return `
      <article class="feature-card">
        <span class="feature-status">${status}</span>
        <strong>${title}</strong>
        <p>${acceptance}</p>
      </article>
    `;
  }).join('');
}

async function boot() {
  const [dashboard, features] = await Promise.all([
    invokeOrFallback('wallet_dashboard', fallbackDashboard),
    invokeOrFallback('wallet_mvp_summary', fallbackFeatures)
  ]);
  renderDashboard(dashboard);
  renderFeatures(features);
}

boot();