// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.26;

import {IAllowanceTransfer} from "permit2/src/interfaces/IAllowanceTransfer.sol";
import {SafeCast160} from "permit2/src/libraries/SafeCast160.sol";
import {Payments} from "./Payments.sol";

/// @title Payments through Permit2
/// @notice Performs interactions with Permit2 to transfer tokens
abstract contract Permit2Payments is Payments {
    using SafeCast160 for uint256;

    error FromAddressIsNotOwner();

    /// @notice Performs a transferFrom on Permit2
    /// @param token The token to transfer
    /// @param from The address to transfer from
    /// @param to The recipient of the transfer
    /// @param amount The amount to transfer
    function permit2TransferFrom(
        address token,
        address from,
        address to,
        uint160 amount
    ) internal {
        PERMIT2.transferFrom(from, to, amount, token);
    }

    /// @notice Performs a batch transferFrom on Permit2
    /// @param batchDetails An array detailing each of the transfers that should occur
    /// @param owner The address that should be the owner of all transfers
    function permit2TransferFrom(
        IAllowanceTransfer.AllowanceTransferDetails[] calldata batchDetails,
        address owner
    ) internal {
        uint256 batchLength = batchDetails.length;
        for (uint256 i = 0; i < batchLength; ++i) {
            if (batchDetails[i].from != owner) revert FromAddressIsNotOwner();
        }
        PERMIT2.transferFrom(batchDetails);
    }

    /// @notice Either performs a regular payment or transferFrom on Permit2, depending on the payer address
    /// @param token The token to transfer
    /// @param payer The address to pay for the transfer
    /// @param recipient The recipient of the transfer
    /// @param amount The amount to transfer
    function payOrPermit2Transfer(
        address token,
        address payer,
        address recipient,
        uint256 amount
    ) internal {
        if (payer == address(this)) pay(token, recipient, amount);
        else permit2TransferFrom(token, payer, recipient, amount.toUint160());
    }
}