import { createConfig, createStorage, http } from 'wagmi'
import { mainnet } from 'wagmi/chains'
import { injected, walletConnect } from 'wagmi/connectors'

export const chains = [mainnet] as const

// WalletConnect v2 requires a free project ID from https://cloud.walletconnect.com
// Set NEXT_PUBLIC_WALLETCONNECT_PROJECT_ID in .env.local to enable:
//   - QR code scanning (desktop → mobile wallet)
//   - All WalletConnect-compatible mobile wallets
// Without it, only injected (browser extension) wallets are available.
const wcProjectId = process.env.NEXT_PUBLIC_WALLETCONNECT_PROJECT_ID

export const config = createConfig({
  chains,
  connectors: [
    // Generic injected connector — NOT pinned to target:'metaMask'. Pinning to
    // MetaMask made every other injected wallet (Rabby, Coinbase Wallet ext,
    // Brave, Frame, Trust, OKX…) fail to connect, and broke in browsers where
    // window.ethereum isn't MetaMask. wagmi v2 auto-discovers all injected
    // wallets via EIP-6963 (multiInjectedProviderDiscovery, on by default), so
    // a generic injected() connector covers them.
    injected({ shimDisconnect: false }),

    // WalletConnect v2 — enabled when NEXT_PUBLIC_WALLETCONNECT_PROJECT_ID is set.
    // Provides QR-code pairing (desktop ↔ mobile) and all WalletConnect wallets.
    // Get a free project ID at https://cloud.walletconnect.com
    ...(wcProjectId
      ? [walletConnect({
          projectId: wcProjectId,
          metadata: {
            name: 'Trump Alpha',
            description: 'Live crypto signals — Trump posts, BTC macro, KOL divergence',
            url: process.env.NEXT_PUBLIC_SITE_URL || 'https://trumpsignal.com',
            icons: ['https://trumpsignal.com/icon'],
          },
          showQrModal: true,
        })]
      : []),
  ],
  transports: {
    [mainnet.id]: http(),
  },
  // sessionStorage: clears on tab close, prevents stale auto-reconnect across sessions.
  // This means MetaMask only pops when the user explicitly clicks "Connect wallet".
  storage: typeof window !== 'undefined'
    ? createStorage({ storage: window.sessionStorage })
    : undefined,
  // Disable silent auto-reconnect on page mount.
  // Without this, wagmi checks localStorage/sessionStorage for a saved connector
  // and tries to reconnect MetaMask silently — which can pop the MetaMask window.
  // User must explicitly click "Connect wallet" each session.
  ssr: true,
})