import {queryHelperContract} from "@/blockchain/contract.js";
import {Exchange} from "@/blockchain/orderlib.js";
import {useStore} from "@/store/store.js";


export async function findRoute(tokenA, tokenB) {
    const helper = await queryHelperContract()
    if (!helper)
        throw Error('no helper')
    const chainId = useStore().chainId
    const rawRoutes = await helper.getRoutes(tokenA.address, tokenB.address)
    // todo expose all available pools
    console.log('raw routes', rawRoutes)
    let result = null // we actually only find a single pool for now
    for (let [exchange, fee, pool] of rawRoutes) {
        exchange = Number(exchange)
        fee = Number(fee)
        if (!result || result.fee > fee) {
            switch (exchange) {
                case 0: // UniswapV2
                    throw Error('Uniswap V2 not yet supported')
                case 1: // UniswapV3
                    const [token0, token1] = tokenA.address < tokenB.address ? [tokenA, tokenB] : [tokenB, tokenA]
                    result = {chainId, exchange: Exchange.UniswapV3, pool, fee, token0, token1}
                    break
            }
        }
    }
    return result ? [result] : []
}