/*

 * @name        Application Entity Contract
 * @package     BlockBitsIO
 * @author      Micky Socaci

 Contains the main company Entity Contract code deployed and linked to the Gateway Interface.

*/

pragma solidity ^0.4.17;

import "./GatewayInterface.sol";
import "./Entity/Proposals.sol";
import "./Entity/Funding.sol";
import "./Entity/Meetings.sol";
import "./Entity/Milestones.sol";
import "./Entity/BountyManager.sol";
import "./Entity/TokenManager.sol";
import "./Entity/FundingManager.sol";
import "./Entity/ListingContract.sol";
import "./Entity/NewsContract.sol";

contract ApplicationEntity {

    /* Source Code Url */
    bytes32 sourceCodeUrl;

    /* Entity initialised or not */
    bool public _initialized = false;

    /* Entity locked or not */
    bool public _locked = false;

    /* Current Entity State */
    uint8 public CurrentEntityState;

    /* Available Entity State */
    mapping (bytes32 => uint8) public EntityStates;

    /* GatewayInterface address */
    address public GatewayInterfaceAddress;

    /* Parent Entity Instance */
    GatewayInterface GatewayInterfaceEntity;

    /* Asset Entities */
    Proposals public ProposalsEntity;
    Funding public FundingEntity;
    Milestones public MilestonesEntity;
    Meetings public MeetingsEntity;
    BountyManager public BountyManagerEntity;
    TokenManager public TokenManagerEntity;
    ListingContract public ListingContractEntity;
    FundingManager public FundingManagerEntity;
    NewsContract public NewsContractEntity;

    /* Asset Collection */
    mapping (bytes32 => address) public AssetCollection;
    mapping (uint8 => bytes32) public AssetCollectionIdToName;
    uint8 public AssetCollectionNum = 0;

    event EventAppEntityReady ( address indexed _address );
    event EventAppEntityCodeUpgradeProposal ( address indexed _address, bytes32 indexed _sourceCodeUrl );
    event EventAppEntityInitAsset ( bytes32 indexed _name, address indexed _address );
    event EventAppEntityInitAssetsToThis ( uint8 indexed _assetNum );
    event EventAppEntityAssetsToNewApplication ( address indexed _address );
    event EventAppEntityLocked ( address indexed _address );

    address public deployerAddress;

    function ApplicationEntity() public {
        deployerAddress = msg.sender;
        setEntityStates();
        CurrentEntityState = getEntityState("NEW");
    }

    function setEntityStates() internal {

        // ApplicationEntity States
        EntityStates["__IGNORED__"]                 = 0;
        EntityStates["NEW"]                         = 1;
        EntityStates["WAITING"]                     = 2;
        EntityStates["IN_FUNDING"]                  = 3;
        EntityStates["IN_DEVELOPMENT"]              = 5;
        EntityStates["IN_CODE_UPGRADE"]             = 50;
        EntityStates["UPGRADED"]                    = 100;
        EntityStates["IN_GLOBAL_CASHBACK"]          = 150;
        EntityStates["LOCKED"]                      = 200;
        EntityStates["DEVELOPMENT_COMPLETE"]        = 250;
    }

    function getEntityState(bytes32 name) public view returns (uint8) {
        return EntityStates[name];
    }

    /*
    * Initialize Application and it's assets
    * If gateway is freshly deployed, just link
    * else, create a voting proposal that needs to be accepted for the linking
    *
    * @param        address _newAddress
    * @param        bytes32 _sourceCodeUrl
    *
    * @modifiers    requireNoParent, requireNotInitialised
    */
    function linkToGateway(
        address _GatewayInterfaceAddress,
        bytes32 _sourceCodeUrl
    )
        external
        requireNoParent
        requireNotInitialised
        onlyDeployer
    {
        GatewayInterfaceAddress = _GatewayInterfaceAddress;
        sourceCodeUrl = _sourceCodeUrl;

        // init gateway entity and set app address
        GatewayInterfaceEntity = GatewayInterface(GatewayInterfaceAddress);
        GatewayInterfaceEntity.requestCodeUpgrade( address(this), sourceCodeUrl );
    }

    function setUpgradeState(uint8 state) public onlyGatewayInterface {
        CurrentEntityState = state;
    }

    /*
        For the sake of simplicity, and solidity warnings about "unknown gas usage" do this.. instead of sending
        an array of addresses
    */
    function addAssetProposals(address _assetAddresses) external requireNotInitialised onlyDeployer {
        ProposalsEntity = Proposals(_assetAddresses);
        assetInitialized("Proposals", _assetAddresses);
    }

    function addAssetFunding(address _assetAddresses) external requireNotInitialised onlyDeployer {
        FundingEntity = Funding(_assetAddresses);
        assetInitialized("Funding", _assetAddresses);
    }

    function addAssetMilestones(address _assetAddresses) external requireNotInitialised onlyDeployer {
        MilestonesEntity = Milestones(_assetAddresses);
        assetInitialized("Milestones", _assetAddresses);
    }

    function addAssetMeetings(address _assetAddresses) external requireNotInitialised onlyDeployer {
        MeetingsEntity = Meetings(_assetAddresses);
        assetInitialized("Meetings", _assetAddresses);
    }

    function addAssetBountyManager(address _assetAddresses) external requireNotInitialised onlyDeployer {
        BountyManagerEntity = BountyManager(_assetAddresses);
        assetInitialized("BountyManager", _assetAddresses);
    }

    function addAssetTokenManager(address _assetAddresses) external requireNotInitialised onlyDeployer {
        TokenManagerEntity = TokenManager(_assetAddresses);
        assetInitialized("TokenManager", _assetAddresses);
    }

    function addAssetFundingManager(address _assetAddresses) external requireNotInitialised onlyDeployer {
        FundingManagerEntity = FundingManager(_assetAddresses);
        assetInitialized("FundingManager", _assetAddresses);
    }

    function addAssetListingContract(address _assetAddresses) external requireNotInitialised onlyDeployer {
        ListingContractEntity = ListingContract(_assetAddresses);
        assetInitialized("ListingContract", _assetAddresses);
    }

    function addAssetNewsContract(address _assetAddresses) external requireNotInitialised onlyDeployer {
        NewsContractEntity = NewsContract(_assetAddresses);
        assetInitialized("NewsContract", _assetAddresses);
    }

    function assetInitialized(bytes32 name, address _assetAddresses) internal {
        if(AssetCollection[name] == 0x0) {
            AssetCollectionIdToName[AssetCollectionNum] = name;
            AssetCollection[name] = _assetAddresses;
            AssetCollectionNum++;
        } else {
            // just replace
            AssetCollection[name] = _assetAddresses;
        }
        EventAppEntityInitAsset(name, _assetAddresses);
    }

    function getAssetAddressByName(bytes32 _name) public view returns (address) {
        return AssetCollection[_name];
    }

    /* Application Bylaws mapping */
    mapping (bytes32 => uint256) public BylawsUint256;
    mapping (bytes32 => bytes32) public BylawsBytes32;


    function setBylawUint256(bytes32 name, uint256 value) public requireNotInitialised onlyDeployer {
        BylawsUint256[name] = value;
    }

    function getBylawUint256(bytes32 name) public view requireInitialised returns (uint256) {
        return BylawsUint256[name];
    }

    function setBylawBytes32(bytes32 name, bytes32 value) public requireNotInitialised onlyDeployer {
        BylawsBytes32[name] = value;
    }

    function getBylawBytes32(bytes32 name) public view requireInitialised returns (bytes32) {
        return BylawsBytes32[name];
    }

    function initialize() external requireNotInitialised onlyGatewayInterface returns (bool) {
        _initialized = true;
        EventAppEntityReady( address(this) );
        return true;
    }

    function getParentAddress() external view returns(address) {
        return GatewayInterfaceAddress;
    }

    function createCodeUpgradeProposal(
        address _newAddress,
        bytes32 _sourceCodeUrl
    )
        external
        requireInitialised
        onlyGatewayInterface
        returns (uint256)
    {
        // proposals create new.. code upgrade proposal
        EventAppEntityCodeUpgradeProposal ( _newAddress, _sourceCodeUrl );

        // return true;
        return ProposalsEntity.addCodeUpgradeProposal(_newAddress, _sourceCodeUrl);
    }

    /*
    * Only a proposal can update the ApplicationEntity Contract address
    *
    * @param        address _newAddress
    * @modifiers    onlyProposalsAsset
    */
    function acceptCodeUpgradeProposal(address _newAddress) external onlyProposalsAsset  {
        GatewayInterfaceEntity.approveCodeUpgrade( _newAddress );
    }

    function initializeAssetsToThisApplication() external onlyGatewayInterface returns (bool) {

        for(uint8 i = 0; i < AssetCollectionNum; i++ ) {
            bytes32 _name = AssetCollectionIdToName[i];
            address current = AssetCollection[_name];
            if(current != address(0x0)) {
                if(!current.call(bytes4(keccak256("setInitialOwnerAndName(bytes32)")), _name) ) {
                    revert();
                }
            } else {
                revert();
            }
        }
        EventAppEntityInitAssetsToThis( AssetCollectionNum );

        return true;
    }

    function transferAssetsToNewApplication(address _newAddress) external onlyGatewayInterface returns (bool){
        for(uint8 i = 0; i < AssetCollectionNum; i++ ) {

            bytes32 _name = AssetCollectionIdToName[i];
            address current = AssetCollection[_name];
            if(current != address(0x0)) {
                if(!current.call(bytes4(keccak256("transferToNewOwner(address)")), _newAddress) ) {
                    revert();
                }
            } else {
                revert();
            }
        }
        EventAppEntityAssetsToNewApplication ( _newAddress );
        return true;
    }

    /*
    * Only the gateway interface can lock current app after a successful code upgrade proposal
    *
    * @modifiers    onlyGatewayInterface
    */
    function lock() external onlyGatewayInterface returns (bool) {
        _locked = true;
        CurrentEntityState = getEntityState("UPGRADED");
        EventAppEntityLocked(address(this));
        return true;
    }

    /*
        DUMMY METHOD, to be replaced in a future Code Upgrade with a check to determine if sender should be able to initiate a code upgrade
        specifically used after milestone development completes
    */
    address testAddressAllowUpgradeFrom;
    function canInitiateCodeUpgrade(address _sender) public view returns(bool) {
        // suppress warning
        if(testAddressAllowUpgradeFrom != 0x0 && testAddressAllowUpgradeFrom == _sender) {
            return true;
        }
        return false;
    }

    /*
    * Throws if called by any other entity except GatewayInterface
    */
    modifier onlyGatewayInterface() {
        require(GatewayInterfaceAddress != address(0) && msg.sender == GatewayInterfaceAddress);
        _;
    }

    /*
    * Throws if called by any other entity except Proposals Asset Contract
    */
    modifier onlyProposalsAsset() {
        require(msg.sender == address(ProposalsEntity));
        _;
    }

    modifier requireNoParent() {
        require(GatewayInterfaceAddress == address(0x0));
        _;
    }

    modifier requireNotInitialised() {
        require(_initialized == false && _locked == false);
        _;
    }

    modifier requireInitialised() {
        require(_initialized == true && _locked == false);
        _;
    }

    modifier onlyDeployer() {
        require(msg.sender == deployerAddress);
        _;
    }

    event DebugApplicationRequiredChanges( uint8 indexed _current, uint8 indexed _required );
    event EventApplicationEntityProcessor(uint8 indexed _current, uint8 indexed _required);

    function doStateChanges() public {

        if(!_locked) {
            // process assets first so we can initialize them from NEW to WAITING
            AssetProcessor();

            var (returnedCurrentEntityState, EntityStateRequired) = getRequiredStateChanges();
            bool callAgain = false;

            DebugApplicationRequiredChanges( returnedCurrentEntityState, EntityStateRequired );

            if(EntityStateRequired != getEntityState("__IGNORED__") ) {
                EntityProcessor(EntityStateRequired);
                callAgain = true;
            }
        } else {
            revert();
        }
    }

    function hasRequiredStateChanges() public view returns (bool) {
        bool hasChanges = false;
        if(!_locked) {
            var (returnedCurrentEntityState, EntityStateRequired) = getRequiredStateChanges();
            // suppress unused local variable warning
            returnedCurrentEntityState = 0;
            if(EntityStateRequired != getEntityState("__IGNORED__") ) {
                hasChanges = true;
            }

            if(anyAssetHasChanges()) {
                hasChanges = true;
            }
        }
        return hasChanges;
    }

    function anyAssetHasChanges() public view returns (bool) {
        if( FundingEntity.hasRequiredStateChanges() ) {
            return true;
        }
        if( FundingManagerEntity.hasRequiredStateChanges() ) {
            return true;
        }
        if( MilestonesEntity.hasRequiredStateChanges() ) {
            return true;
        }
        if( ProposalsEntity.hasRequiredStateChanges() ) {
            return true;
        }

        return extendedAnyAssetHasChanges();
    }

    // use this when extending "has changes"
    function extendedAnyAssetHasChanges() internal view returns (bool) {
        if(_initialized) {}
        return false;
    }

    // use this when extending "asset state processor"
    function extendedAssetProcessor() internal  {
        // does not exist, but we check anyway to bypass compier warning about function state mutability
        if ( CurrentEntityState == 255 ) {
            ProposalsEntity.process();
        }
    }

    // view methods decide if changes are to be made
    // in case of tasks, we do them in the Processors.

    function AssetProcessor() internal {


        if ( CurrentEntityState == getEntityState("NEW") ) {

            // move all assets that have states to "WAITING"
            if(FundingEntity.hasRequiredStateChanges()) {
                FundingEntity.doStateChanges();
            }

            if(FundingManagerEntity.hasRequiredStateChanges()) {
                FundingManagerEntity.doStateChanges();
            }

            if( MilestonesEntity.hasRequiredStateChanges() ) {
                MilestonesEntity.doStateChanges();
            }

        } else if ( CurrentEntityState == getEntityState("WAITING") ) {

            if( FundingEntity.hasRequiredStateChanges() ) {
                FundingEntity.doStateChanges();
            }
        }
        else if ( CurrentEntityState == getEntityState("IN_FUNDING") ) {

            if( FundingEntity.hasRequiredStateChanges() ) {
                FundingEntity.doStateChanges();
            }

            if( FundingManagerEntity.hasRequiredStateChanges() ) {
                FundingManagerEntity.doStateChanges();
            }
        }
        else if ( CurrentEntityState == getEntityState("IN_DEVELOPMENT") ) {

            if( FundingManagerEntity.hasRequiredStateChanges() ) {
                FundingManagerEntity.doStateChanges();
            }

            if(MilestonesEntity.hasRequiredStateChanges()) {
                MilestonesEntity.doStateChanges();
            }

            if(ProposalsEntity.hasRequiredStateChanges()) {
                ProposalsEntity.process();
            }
        }
        else if ( CurrentEntityState == getEntityState("DEVELOPMENT_COMPLETE") ) {

            if(ProposalsEntity.hasRequiredStateChanges()) {
                ProposalsEntity.process();
            }
        }

        extendedAssetProcessor();
    }

    function EntityProcessor(uint8 EntityStateRequired) internal {

        EventApplicationEntityProcessor( CurrentEntityState, EntityStateRequired );

        // Update our Entity State
        CurrentEntityState = EntityStateRequired;

        // Do State Specific Updates

        if ( EntityStateRequired == getEntityState("IN_FUNDING") ) {
            // run Funding state changer
            // doStateChanges
        }

    }

    /*
     * Method: Get Entity Required State Changes
     *
     * @access       public
     * @type         method
     *
     * @return       ( uint8 CurrentEntityState, uint8 EntityStateRequired )
     */
    function getRequiredStateChanges() public view returns (uint8, uint8) {

        uint8 EntityStateRequired = getEntityState("__IGNORED__");

        if( CurrentEntityState == getEntityState("NEW") ) {
            // general so we know we initialized
            EntityStateRequired = getEntityState("WAITING");

        } else if ( CurrentEntityState == getEntityState("WAITING") ) {

            // Funding Started
            if( FundingEntity.CurrentEntityState() == FundingEntity.getEntityState("IN_PROGRESS") ) {
                EntityStateRequired = getEntityState("IN_FUNDING");
            }

        } else if ( CurrentEntityState == getEntityState("IN_FUNDING") ) {

            if(FundingEntity.CurrentEntityState() == FundingEntity.getEntityState("SUCCESSFUL_FINAL")) {
                // SUCCESSFUL_FINAL means FUNDING was successful, and FundingManager has finished distributing tokens and ether
                EntityStateRequired = getEntityState("IN_DEVELOPMENT");

            } else if(FundingEntity.CurrentEntityState() == FundingEntity.getEntityState("FAILED_FINAL")) {
                // Funding failed..
                EntityStateRequired = getEntityState("IN_GLOBAL_CASHBACK");
            }

        } else if ( CurrentEntityState == getEntityState("IN_DEVELOPMENT") ) {

            if(MilestonesEntity.CurrentEntityState() == MilestonesEntity.getEntityState("DEVELOPMENT_COMPLETE")) {
                // check if we finished developing all milestones .. and if so move state to complete.
                EntityStateRequired = getEntityState("DEVELOPMENT_COMPLETE");
            }

            if(MilestonesEntity.CurrentEntityState() == MilestonesEntity.getEntityState("DEADLINE_MEETING_TIME_FAILED")) {
                EntityStateRequired = getEntityState("IN_GLOBAL_CASHBACK");
            }

        }

        return (CurrentEntityState, EntityStateRequired);
    }

    function getTimestamp() view public returns (uint256) {
        return now;
    }