// SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.24;

import "./core/DAO.sol";
import "./Availability.sol";

contract Rollup is Availability {
    constructor(DAO dao) Availability(dao) {}

    struct BatchItem {
        address worker;
        uint stakeAmount;
        uint fee;
        string evidenceContentId;
    }

    mapping(uint => BatchItem) items;
    uint itemCount;
    address batchWorker;
    uint batchWorkerStakeIndex;

    function addItem(
        address worker,
        uint stakeAmount,
        string calldata evidenceContentId
    ) public payable {
        BatchItem storage item = items[itemCount++];
        item.worker = worker;
        item.stakeAmount = stakeAmount;
        item.fee = msg.value;
        item.evidenceContentId = evidenceContentId;
    }

    function submitBatch(
        string calldata batchPostId,
        uint poolDuration
    ) public {
        if (batchWorker != address(0)) {
            require(
                msg.sender == batchWorker,
                "Batch result must be submitted by current batch worker"
            );
        }
        // initiate a validation pool for this batch
        uint fee;
        for (uint i = 0; i < itemCount; i++) {
            fee += items[i].fee;
        }
        uint poolIndex = dao.initiateValidationPool{value: fee}(
            batchPostId,
            poolDuration,
            [uint256(1), uint256(3)],
            [uint256(1), uint256(2)],
            100,
            true,
            false,
            ""
        );
        // Include all the availability stakes from the batched work
        for (uint i = 0; i < itemCount; i++) {
            dao.delegatedStakeOnValidationPool(
                poolIndex,
                items[i].worker,
                items[i].stakeAmount,
                true
            );
        }
        // Include availability stakes from the batch worker
        dao.delegatedStakeOnValidationPool(
            poolIndex,
            batchWorker,
            stakes[batchWorkerStakeIndex].amount,
            true
        );
        // Reset item count so we can start the next batch
        itemCount = 0;
        // Select the next worker
        batchWorkerStakeIndex = assignWork();
        batchWorker = stakes[batchWorkerStakeIndex].worker;
    }
}