import { WalletInit } from '@web3-onboard/common'

function coinbaseWallet({
  darkMode = false
}: {
  darkMode?: boolean
} = {}): WalletInit {
  return () => {
    return {
      label: 'Coinbase Wallet',
      getIcon: async () => (await import('./icon.js')).default,
      getInterface: async ({ chains, appMetadata }) => {
        const [chain] = chains
        const { name, icon } = appMetadata || {}

        // according to https://github.com/wagmi-dev/wagmi/issues/383
        // @coinbase/wallet-sdk export double default fields
        // so we need to detect it to get the real constructor
        const { default: CoinbaseWalletSDK } = await import(
          '@coinbase/wallet-sdk'
        )
        const CoinbaseWalletSDKConstructor = (
          (CoinbaseWalletSDK as any).default
            ? (CoinbaseWalletSDK as any).default
            : CoinbaseWalletSDK
        ) as typeof CoinbaseWalletSDK

        const base64 = window.btoa(icon || '')
        const appLogoUrl = `data:image/svg+xml;base64,${base64}`

        const instance = new CoinbaseWalletSDKConstructor({
          appName: name || '',
          appLogoUrl,
          darkMode
        })

        const coinbaseWalletProvider = instance.makeWeb3Provider(
          chain.rpcUrl,
          parseInt(chain.id)
        )

        // patch the chainChanged event
        const on = coinbaseWalletProvider.on.bind(coinbaseWalletProvider)
        coinbaseWalletProvider.on = (event, listener) => {
          on(event, val => {
            if (event === 'chainChanged') {
              listener(`0x${(val as number).toString(16)}`)
              return
            }

            listener(val)
          })

          return coinbaseWalletProvider
        }

        return {
          provider: coinbaseWalletProvider,
          instance
        }
      }
    }
  }
}

export default coinbaseWallet