import BigNumber from 'bignumber'

type MixedData = string | number | Object | any[] | BigNumber
declare class Web3 {
  public BigNumber: typeof BigNumber

  public static providers: typeof providers
  public currentProvider: Web3.Provider

  public eth: Web3.EthApi
  public personal: Web3.PersonalApi | undefined
  public version: Web3.VersionApi
  public net: Web3.NetApi

  public constructor(provider?: Web3.Provider)

  public isConnected(): boolean
  public setProvider(provider: Web3.Provider): void
  public reset(keepIsSyncing: boolean): void
  public toHex(data: MixedData): string
  public toAscii(hex: string): string
  public fromAscii(ascii: string, padding?: number): string
  public toDecimal(hex: string): number
  public fromDecimal(value: number | string): string
  public fromWei(value: number | string, unit: Web3.Unit): string
  public fromWei(value: BigNumber, unit: Web3.Unit): BigNumber
  public toWei(amount: number | string, unit: Web3.Unit): string
  public toWei(amount: BigNumber, unit: Web3.Unit): BigNumber
  public toBigNumber(value: number | string): BigNumber
  public isAddress(address: string): boolean
  public isChecksumAddress(address: string): boolean
  public sha3(value: string, options?: Web3.Sha3Options): string
}

declare namespace providers {
  class HttpProvider implements Web3.Provider {
    constructor(url?: string, timeout?: number, username?: string, password?: string)
    sendAsync(
      payload: Web3.JSONRPCRequestPayload,
      callback: (err: Error, result: Web3.JSONRPCResponsePayload) => void
    ): void
  }
}

declare namespace Web3 {
  type ContractAbi = AbiDefinition[]

  type AbiDefinition = FunctionAbi | EventAbi

  type FunctionAbi = MethodAbi | ConstructorAbi | FallbackAbi

  interface MethodAbi {
    type: 'function'
    name: string
    inputs: FunctionParameter[]
    outputs: FunctionParameter[]
    constant: boolean
    payable: boolean
    stateMutability: string
  }

  interface ConstructorAbi {
    type: 'constructor'
    inputs: FunctionParameter[]
    payable: boolean
  }

  interface FallbackAbi {
    type: 'fallback'
    payable: boolean
  }

  interface EventParameter {
    name: string
    type: string
    indexed: boolean
  }

  interface EventAbi {
    type: 'event'
    name: string
    inputs: EventParameter[]
    anonymous: boolean
  }

  interface FunctionParameter {
    name: string
    type: string
  }

  interface ContractInstance {
    address: string
    abi: Web3.ContractAbi
    [name: string]: any
  }

  interface Contract<A extends ContractInstance> {
    at(address: string): A
  }

  interface FilterObject {
    fromBlock: number | string
    toBlock: number | string
    address: string
    topics: string[]
  }

  interface SolidityEvent<A> {
    event: string
    address: string
    args: A
  }

  interface FilterResult {
    get(callback: () => void): void
    watch<A>(callback: (err: Error, result: SolidityEvent<A>) => void): void
    stopWatching(callback: () => void): void
  }

  export interface JSONRPCRequestPayload {
    params?: any[]
    method: string
    id: number
    jsonrpc: string
  }

  export interface JSONRPCResponsePayload {
    result: any
    id: number
    jsonrpc: string
  }

  interface Provider {
    sendAsync(payload: JSONRPCRequestPayload, callback: (err: Error, result: JSONRPCResponsePayload) => void): void
  }

  interface Sha3Options {
    encoding: 'hex'
  }

  interface EthApi {
    coinbase: string
    mining: boolean
    hashrate: number
    gasPrice: BigNumber
    accounts: string[]
    blockNumber: number
    defaultAccount: string
    defaultBlock: Web3.BlockParam
    syncing: Web3.SyncingResult
    compile: {
      solidity(sourceString: string, cb?: (err: Error, result: any) => void): Object
    }
    getMining(cd: (err: Error, mining: boolean) => void): void
    getHashrate(cd: (err: Error, hashrate: number) => void): void
    getGasPrice(cd: (err: Error, gasPrice: BigNumber) => void): void
    getAccounts(cd: (err: Error, accounts: string[]) => void): void
    getBlockNumber(callback: (err: Error, blockNumber: number) => void): void
    getSyncing(cd: (err: Error, syncing: Web3.SyncingResult) => void): void
    isSyncing(cb: (err: Error, isSyncing: boolean, syncingState: Web3.SyncingState) => void): Web3.IsSyncing

    getBlock(hashStringOrBlockNumber: string | Web3.BlockParam): Web3.BlockWithoutTransactionData
    getBlock(
      hashStringOrBlockNumber: string | Web3.BlockParam,
      callback: (err: Error, blockObj: Web3.BlockWithoutTransactionData) => void
    ): void
    getBlock(
      hashStringOrBlockNumber: string | Web3.BlockParam,
      returnTransactionObjects: true
    ): Web3.BlockWithTransactionData
    getBlock(
      hashStringOrBlockNumber: string | Web3.BlockParam,
      returnTransactionObjects: true,
      callback: (err: Error, blockObj: Web3.BlockWithTransactionData) => void
    ): void

    getBlockTransactionCount(hashStringOrBlockNumber: string | Web3.BlockParam): number
    getBlockTransactionCount(
      hashStringOrBlockNumber: string | Web3.BlockParam,
      callback: (err: Error, blockTransactionCount: number) => void
    ): void

    // TODO returnTransactionObjects
    getUncle(hashStringOrBlockNumber: string | Web3.BlockParam, uncleNumber: number): Web3.BlockWithoutTransactionData
    getUncle(
      hashStringOrBlockNumber: string | Web3.BlockParam,
      uncleNumber: number,
      callback: (err: Error, uncle: Web3.BlockWithoutTransactionData) => void
    ): void

    getTransaction(transactionHash: string): Web3.Transaction
    getTransaction(transactionHash: string, callback: (err: Error, transaction: Web3.Transaction) => void): void

    getTransactionFromBlock(hashStringOrBlockNumber: string | Web3.BlockParam, indexNumber: number): Web3.Transaction
    getTransactionFromBlock(
      hashStringOrBlockNumber: string | Web3.BlockParam,
      indexNumber: number,
      callback: (err: Error, transaction: Web3.Transaction) => void
    ): void

    contract(abi: Web3.AbiDefinition[]): Web3.Contract<any>

    // TODO block param
    getBalance(addressHexString: string): BigNumber
    getBalance(addressHexString: string, callback: (err: Error, result: BigNumber) => void): void

    // TODO block param
    getStorageAt(address: string, position: number): string
    getStorageAt(address: string, position: number, callback: (err: Error, storage: string) => void): void

    // TODO block param
    getCode(addressHexString: string): string
    getCode(addressHexString: string, callback: (err: Error, code: string) => void): void

    filter(value: string | Web3.FilterObject): Web3.FilterResult

    sendTransaction(txData: Web3.TxData): string
    sendTransaction(txData: Web3.TxData, callback: (err: Error, value: string) => void): void

    sendRawTransaction(rawTxData: string): string
    sendRawTransaction(rawTxData: string, callback: (err: Error, value: string) => void): void

    sign(address: string, data: string): string
    sign(address: string, data: string, callback: (err: Error, signature: string) => void): void

    getTransactionReceipt(txHash: string): Web3.TransactionReceipt
    getTransactionReceipt(txHash: string, callback: (err: Error, receipt: Web3.TransactionReceipt) => void): void

    // TODO block param
    call(callData: Web3.CallData): string
    call(callData: Web3.CallData, callback: (err: Error, result: string) => void): void

    estimateGas(callData: Web3.CallData): number
    estimateGas(callData: Web3.CallData, callback: (err: Error, gas: number) => void): void

    // TODO defaultBlock
    getTransactionCount(address: string): number
    getTransactionCount(address: string, callback: (err: Error, count: number) => void): void
  }

  interface VersionApi {
    api: string
    network: string
    node: string
    ethereum: string
    whisper: string
    getNetwork(cd: (err: Error, networkId: string) => void): void
    getNode(cd: (err: Error, nodeVersion: string) => void): void
    getEthereum(cd: (err: Error, ethereum: string) => void): void
    getWhisper(cd: (err: Error, whisper: string) => void): void
  }

  interface PersonalApi {
    listAccounts: string[] | undefined
    newAccount(password?: string): string
    unlockAccount(address: string, password?: string, duration?: number): boolean
    lockAccount(address: string): boolean
    sign(message: string, account: string, password: string): string
  }

  interface NetApi {
    listening: boolean
    peerCount: boolean
    getListening(cd: (err: Error, listening: boolean) => void): void
    getPeerCount(cd: (err: Error, peerCount: number) => void): void
  }

  type BlockParam = number | 'earliest' | 'latest' | 'pending'

  type Unit =
    | 'kwei'
    | 'ada'
    | 'mwei'
    | 'babbage'
    | 'gwei'
    | 'shannon'
    | 'szabo'
    | 'finney'
    | 'ether'
    | 'kether'
    | 'grand'
    | 'einstein'
    | 'mether'
    | 'gether'
    | 'tether'

  interface SyncingState {
    startingBlock: number
    currentBlock: number
    highestBlock: number
  }
  type SyncingResult = false | SyncingState

  interface IsSyncing {
    addCallback(cb: (err: Error, isSyncing: boolean, syncingState: SyncingState) => void): void
    stopWatching(): void
  }

  interface AbstractBlock {
    number: number | null
    hash: string | null
    parentHash: string
    nonce: string | null
    sha3Uncles: string
    logsBloom: string | null
    transactionsRoot: string
    stateRoot: string
    miner: string
    difficulty: BigNumber
    totalDifficulty: BigNumber
    extraData: string
    size: number
    gasLimit: number
    gasUser: number
    timestamp: number
    uncles: string[]
  }
  interface BlockWithoutTransactionData extends AbstractBlock {
    transactions: string[]
  }
  interface BlockWithTransactionData extends AbstractBlock {
    transactions: Transaction[]
  }

  interface Transaction {
    hash: string
    nonce: number
    blockHash: string | null
    blockNumber: number | null
    transactionIndex: number | null
    from: string
    to: string | null
    value: BigNumber
    gasPrice: BigNumber
    gas: number
    input: string
  }

  interface CallTxDataBase {
    to?: string
    value?: number | string | BigNumber
    gas?: number | string | BigNumber
    gasPrice?: number | string | BigNumber
    data?: string
    nonce?: number
  }

  interface TxData extends CallTxDataBase {
    from: string
  }

  interface CallData extends CallTxDataBase {
    from?: string
  }

  interface TransactionReceipt {
    blockHash: string
    blockNumber: number
    transactionHash: string
    transactionIndex: number
    from: string
    to: string
    cumulativeGasUsed: number
    gasUsed: number
    contractAddress: string | null
    logs: LogEntry[]
  }

  interface LogEntry {
    logIndex: number | null
    transactionIndex: number
    transactionHash: string
    blockHash: string | null
    blockNumber: number | null
    address: string
    data: string
    topics: string[]
  }
}