// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.4;

// modules
import {ERC725Y} from "@erc725/smart-contracts-v8/contracts/ERC725Y.sol";

// constants
import {
    _LSP4_SUPPORTED_STANDARDS_KEY,
    _LSP4_SUPPORTED_STANDARDS_VALUE,
    _LSP4_TOKEN_NAME_KEY,
    _LSP4_TOKEN_SYMBOL_KEY,
    _LSP4_TOKEN_TYPE_KEY
} from "./LSP4Constants.sol";

// errors
import {
    LSP4TokenNameNotEditable,
    LSP4TokenSymbolNotEditable,
    LSP4TokenTypeNotEditable
} from "./LSP4Errors.sol";

/**
 * @title Implementation of a LSP4DigitalAssetMetadata contract that stores the **Token-Metadata** (`LSP4TokenName` and `LSP4TokenSymbol`) in its ERC725Y data store.
 * @author Matthew Stevens
 * @dev Standard Implementation of the LSP4 standard.
 */
abstract contract LSP4DigitalAssetMetadata is ERC725Y {
    /**
     * @notice Deploying a digital asset `name_` with the `symbol_` symbol.
     *
     * @param name_ The name of the token.
     * @param symbol_ The symbol of the token.
     * @param initialOwner_ The owner of the token contract.
     * @param lsp4TokenType_ The type of token this digital asset contract represents (`0` = Token, `1` = NFT, `2` = Collection).
     */
    constructor(
        string memory name_,
        string memory symbol_,
        address initialOwner_,
        uint256 lsp4TokenType_
    ) ERC725Y(initialOwner_) {
        // set data key SupportedStandards:LSP4DigitalAsset
        ERC725Y._setData(
            _LSP4_SUPPORTED_STANDARDS_KEY,
            _LSP4_SUPPORTED_STANDARDS_VALUE
        );

        ERC725Y._setData(_LSP4_TOKEN_NAME_KEY, bytes(name_));
        ERC725Y._setData(_LSP4_TOKEN_SYMBOL_KEY, bytes(symbol_));
        ERC725Y._setData(_LSP4_TOKEN_TYPE_KEY, abi.encode(lsp4TokenType_));
    }

    /**
     * @dev The ERC725Y data keys `LSP4TokenName` and `LSP4TokenSymbol` cannot be changed
     * via this function once the digital asset contract has been deployed.
     */
    function _setData(
        bytes32 dataKey,
        bytes memory dataValue
    ) internal virtual override {
        if (dataKey == _LSP4_TOKEN_NAME_KEY) {
            revert LSP4TokenNameNotEditable();
        } else if (dataKey == _LSP4_TOKEN_SYMBOL_KEY) {
            revert LSP4TokenSymbolNotEditable();
        } else if (dataKey == _LSP4_TOKEN_TYPE_KEY) {
            revert LSP4TokenTypeNotEditable();
        } else {
            _store[dataKey] = dataValue;

            emit DataChanged(dataKey, dataValue);
        }
    }
}