//@ts-ignore
import { keccak256, _jsonInterfaceMethodToString, AbiInput } from "web3-utils";
import web3abi from 'web3-eth-abi';
import { IEventCfg } from "interface/IEventCfg";

export const getTopics = (cfg: IEventCfg) => {
  // let abi = cfg.abi
  // let topic = `${abi.name}(`
  // for (let item of abi.inputs) {
  //   topic += item.type + ','
  // }
  // topic = topic.slice(0, -1)
  // topic += ')'
  return  keccak256(_jsonInterfaceMethodToString(cfg.abi))
}

export const decodeEvent = (cfg: IEventCfg, eventData: {data: string, topics: string[]}) => {
  const abiInputs = cfg.abi.inputs;
  let result = web3abi.decodeLog(abiInputs, eventData.data, eventData.topics.slice(1));
  let decodedData: any = {}
  for (let i = 0; i < abiInputs.length; i++) {
    const input: AbiInput = abiInputs[i];
    if (input.type === 'tuple[]') {
      // @ts-ignore
      decodedData[input.name] = result[i].map(item => {
        let itemData = {}
        for (let j = 0; j < input.components.length; j++) {
          const component = input.components[j];
          itemData[component.name] = item[j]
        }
        return itemData
      })
    } else if (input.type === 'tuple') {
      let itemData = {}
      for (let j = 0; j < input.components.length; j++) {
        const component = input.components[j];
        itemData[component.name] = result[i][j]
      }
      decodedData[input.name] = itemData
    } else {
      decodedData[input.name] = result[i]
    }
  }
  return decodedData
}