import {AsyncAbiCache, abiPath} from "../web/src/common.js"
import {ethers} from "ethers";
import fs from "fs";

const ABI_BASE_URL = '../contract/out/'


export class AsyncFileCache extends AsyncAbiCache {
    constructor(pathForKey) {
        super(async (key) => {
            const path = this.pathForKey(key)
            const data = fs.readFileSync(path, 'utf8');
            return JSON.parse(data);
        })
        this.pathForKey = pathForKey
    }
}


export class AbiFileCache extends AsyncFileCache {
    constructor(basePath) {
        super((name)=>{
            return this.basePath+abiPath(name)
        })
        this.basePath = basePath.endsWith('/') ? basePath : basePath + '/'
    }
}


const abiCache = new AbiFileCache(ABI_BASE_URL)


export async function getAbi(className) {
    return await abiCache.get(className)
}


export async function newContract(addr, name, provider) {
    const abi = await getAbi(name);
    return new ethers.Contract(addr, abi, provider)
}

export async function mockERC20Contract(addr, provider) {
    return await newContract(addr, 'MockERC20', provider)
}

export async function erc20Contract(addr, provider) {
    return await newContract(addr, 'IERC20Metadata', provider)
}