const fs = require("fs");
const { dedent } = require("tslint/lib/utils");

export const getAbiFileNames = () => {
  return new Promise((resolve, reject) => {
    fs.readdir(`src/abis/`, function (err, filenames) {
      if (err) {
        reject(err);
        return;
      }
      const names = {};
      filenames.forEach(function (filename) {
        const [name] = filename.split(".abi");
        if (!name.includes("index")) {
          names[name] = name;
        }
      });
      resolve(names);
    });
  });
};

const template = (name) => dedent`
import { ${name}ABI } from "../../abis/${name}.abi";
import { Web3ContractProvider, Web3ProviderExtras } from "../web3.provider";

import {
  ${name}ContractEventType,
  ${name}ContractFunctions,
  // @ts-ignore
} from "./aut-contract-functions";

const Web3${name}Provider = (
  addressOrName: string,
  extras?: Partial<Web3ProviderExtras<${name}ContractEventType>>
) => {
  return Web3ContractProvider<${name}ContractEventType, ${name}ContractFunctions>(
    addressOrName,
    ${name}ABI,
    extras as Web3ProviderExtras<${name}ContractEventType>
  );
};

export { Web3${name}Provider, ${name}ContractEventType, ${name}ContractFunctions };
`;

const updateImport = async (name) => {
  try {
    const dirName = `src/ProviderFactory/index.ts`;
    const fileData = fs.readFileSync(dirName);
    const fileAsStr = fileData.toString("utf8");

    fs.writeFileSync(
      dirName,
      dedent`${fileAsStr}export * from "./${name}Provider";`,
      { encoding: "utf8" }
    );
  } catch (err) {
    console.log(err);
  }
};

export const createProviderFactoryDirs = (names) => {
  for (const name in names) {
    const dirName = `src/ProviderFactory/${name}Provider`;
    if (!fs.existsSync(dirName)) {
      fs.mkdirSync(dirName);
      fs.writeFileSync(`${dirName}/index.ts`, template(name), {
        encoding: "utf8",
      });
      updateImport(name);
    }
  }
};