import { getTokenAggregationApiBase } from '@/services/api/tokenAggregation'

export interface WrappedTransportTokenRow {
  chainId: number
  chainName: string
  symbol: string
  address: string
  assetClass?: string
  familyKey?: string
}

export interface CwRegistryChainRow {
  chainId: number
  chainIdText?: string
  name: string
  tokens: Array<{
    symbol: string
    address: string
    assetClass?: string
    familyKey?: string
  }>
}

export interface CwRegistryResponse {
  generatedAt: string
  source: string
  complete: boolean
  chains: CwRegistryChainRow[]
}

export function externalChainExplorerUrl(chainId: number, address: string): string | undefined {
  const normalized = address.trim()
  if (!/^0x[a-fA-F0-9]{40}$/.test(normalized)) return undefined
  switch (chainId) {
    case 138:
      return `/tokens/${normalized}`
    case 1:
      return `https://etherscan.io/token/${normalized}`
    case 56:
      return `https://bscscan.com/token/${normalized}`
    case 137:
      return `https://polygonscan.com/token/${normalized}`
    case 100:
      return `https://gnosisscan.io/token/${normalized}`
    case 10:
      return `https://optimistic.etherscan.io/token/${normalized}`
    case 42161:
      return `https://arbiscan.io/token/${normalized}`
    case 8453:
      return `https://basescan.org/token/${normalized}`
    case 43114:
      return `https://snowtrace.io/token/${normalized}`
    case 25:
      return `https://cronoscan.com/token/${normalized}`
    case 42220:
      return `https://celoscan.io/token/${normalized}`
    case 1111:
      return `https://scan.wemix.com/token/${normalized}`
    case 651940:
      return `https://alltra.global/address/${normalized}`
    default:
      return undefined
  }
}

export async function fetchCwRegistry(): Promise<CwRegistryChainRow[]> {
  const response = await fetch(`${getTokenAggregationApiBase()}/report/cw-registry`, { cache: 'no-store' })
  if (!response.ok) return []
  const body = (await response.json()) as CwRegistryResponse
  return Array.isArray(body.chains) ? body.chains : []
}

export function flattenCwRegistry(chains: CwRegistryChainRow[]): WrappedTransportTokenRow[] {
  const rows: WrappedTransportTokenRow[] = []
  for (const chain of chains) {
    for (const token of chain.tokens ?? []) {
      if (!token.address?.startsWith('0x')) continue
      rows.push({
        chainId: chain.chainId,
        chainName: chain.name || `Chain ${chain.chainId}`,
        symbol: token.symbol,
        address: token.address,
        assetClass: token.assetClass,
        familyKey: token.familyKey,
      })
    }
  }
  return rows
}