import type { WalletInit } from '@web3-onboard/common'
import { EthereumProviderOptions } from '@walletconnect/ethereum-provider/dist/types/EthereumProvider'
import v1 from './v1.js'
import v2 from './v2.js'
import { validateWCInitOptions } from './validation.js'

export type WalletConnectOptions = {
  /**
   * Optional function to handle WalletConnect URI when it becomes available
   */
  handleUri?: (uri: string) => Promise<unknown>
} & (
  | {
      /**
       * @deprecated
       * Version 1 of WalletConnect has been deprecated by the WC team and the WC bridge is not available.
       * To use version 1 a custom bridge url will need to be provided.
       * Support will be completely remove from Web3-Onboard in the future
       */
      version: 1
      /**
       * Custom URL Bridge must be defined for V1 usage.
       * WalletConnect no longer supports a v1 bridge.
       * Upgrading to use WalletConnect v2 is recommended.
       * A potential bridge option can be found here: 'https://derelay.rabby.io'
       */
      bridge: string
      connectFirstChainId?: boolean
      qrcodeModalOptions?: {
        mobileLinks: string[]
      }
    }
  | {
      /**
       * Project ID associated with [WalletConnect account](https://cloud.walletconnect.com)
       */
      projectId: string
      /**
       * Defaults to `appMetadata.explore` that is supplied to the web3-onboard init
       * Strongly recommended to provide atleast one URL as it is required by some wallets (i.e. MetaMask)
       * To connect with walletconnect
       */
      dappUrl?: string
      /**
       * Defaults to version: 2
       */
      version?: 2
      /**
       * List of Required Chain(s) ID for wallets to support in number format (integer or hex)
       * Defaults to [1] - Ethereum
       */
      requiredChains?: number[] | undefined
      /**
       * List of Optional Chain(s) ID for wallets to support in number format (integer or hex)
       * Defaults to the chains provided within the web3-onboard init chain property
       */
      optionalChains?: number[] | undefined
      /**
       * `undefined` by default, see https://docs.walletconnect.com/2.0/web/walletConnectModal/options
       */
      qrModalOptions?: EthereumProviderOptions['qrModalOptions']
      /**
       * Additional required methods to be added to the default list of ['eth_sendTransaction', 'personal_sign']
       * Passed methods to be included along with the defaults methods - see https://docs.walletconnect.com/2.0/advanced/providers/ethereum#required-and-optional-methods
       */
      additionalRequiredMethods?: string[] | undefined
      /**
       * Additional methods to be added to the default list of ['eth_sendTransaction',  'eth_signTransaction',  'personal_sign',  'eth_sign',  'eth_signTypedData',  'eth_signTypedData_v4']
       * Passed methods to be included along with the defaults methods - see https://docs.walletconnect.com/2.0/web/walletConnectModal/options
       */
      additionalOptionalMethods?: string[] | undefined
    }
)

export const isHexString = (value: string | number) => {
  if (typeof value !== 'string' || !value.match(/^0x[0-9A-Fa-f]*$/)) {
    return false
  }

  return true
}

function walletConnect(options: WalletConnectOptions): WalletInit {
  if (!options) {
    throw new Error(
      `WalletConnect requires an initialization object to be passed - see the official docs for an example: https://onboard.blocknative.com/docs/wallets/walletconnect`
    )
  }
  if (options) {
    const error = validateWCInitOptions(options)

    if (error) {
      throw error
    }
  }
  options.version = options.version || 2
  return options.version === 2 ? v2(options) : v1(options)
}

export default walletConnect