// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "../access/AccessControlUpgradeSafe.sol";
import "../GSN/ContextUpgradeSafe.sol";
import "../token/ERC1155/ERC1155UpgradeSafe.sol";
import "../token/ERC1155/ERC1155BurnableUpgradeSafe.sol";
import "../token/ERC1155/ERC1155PausableUpgradeSafe.sol";
import "../proxy/Initializable.sol";

/**
 * @dev {ERC1155} token, including:
 *
 *  - ability for holders to burn (destroy) their tokens
 *  - a minter role that allows for token minting (creation)
 *  - a pauser role that allows to stop all token transfers
 *
 * This contract uses {AccessControl} to lock permissioned functions using the
 * different roles - head to its documentation for details.
 *
 * The account that deploys the contract will be granted the minter and pauser
 * roles, as well as the default admin role, which will let it grant both minter
 * and pauser roles to other accounts.
 */
contract ERC1155PresetMinterPauserUpgradeSafe is Initializable, ContextUpgradeSafe, AccessControlUpgradeSafe, ERC1155BurnableUpgradeSafe, ERC1155PausableUpgradeSafe {
    function initialize(string memory uri) public virtual initializer {
        __ERC1155PresetMinterPauser_init(uri);
    }
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
    bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");

    /**
     * @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE`, and `PAUSER_ROLE` to the account that
     * deploys the contract.
     */
    function __ERC1155PresetMinterPauser_init(string memory uri) internal initializer {
        __Context_init_unchained();
        __AccessControl_init_unchained();
        __ERC165_init_unchained();
        __ERC1155_init_unchained(uri);
        __ERC1155Burnable_init_unchained();
        __Pausable_init_unchained();
        __ERC1155Pausable_init_unchained();
        __ERC1155PresetMinterPauser_init_unchained(uri);
    }

    function __ERC1155PresetMinterPauser_init_unchained(string memory uri) internal initializer {
        _setupRole(DEFAULT_ADMIN_ROLE, _msgSender());

        _setupRole(MINTER_ROLE, _msgSender());
        _setupRole(PAUSER_ROLE, _msgSender());
    }

    /**
     * @dev Creates `amount` new tokens for `to`, of token type `id`.
     *
     * See {ERC1155-_mint}.
     *
     * Requirements:
     *
     * - the caller must have the `MINTER_ROLE`.
     */
    function mint(address to, uint256 id, uint256 amount, bytes memory data) public virtual {
        require(hasRole(MINTER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have minter role to mint");

        _mint(to, id, amount, data);
    }

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] variant of {mint}.
     */
    function mintBatch(address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data) public virtual {
        require(hasRole(MINTER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have minter role to mint");

        _mintBatch(to, ids, amounts, data);
    }

    /**
     * @dev Pauses all token transfers.
     *
     * See {ERC1155Pausable} and {Pausable-_pause}.
     *
     * Requirements:
     *
     * - the caller must have the `PAUSER_ROLE`.
     */
    function pause() public virtual {
        require(hasRole(PAUSER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have pauser role to pause");
        _pause();
    }

    /**
     * @dev Unpauses all token transfers.
     *
     * See {ERC1155Pausable} and {Pausable-_unpause}.
     *
     * Requirements:
     *
     * - the caller must have the `PAUSER_ROLE`.
     */
    function unpause() public virtual {
        require(hasRole(PAUSER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have pauser role to unpause");
        _unpause();
    }

    function _beforeTokenTransfer(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    )
        internal virtual override(ERC1155UpgradeSafe, ERC1155PausableUpgradeSafe)
    {
        super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
    }
    uint256[50] private __gap;
}
