access(all) contract FlowManager {

    /// Account Manager
    access(all) event AccountAdded(address: Address)

    access(all) struct Mapper {
        access(all) let accounts: {String: Address}

        access(all) view fun getAddress(_ name: String): Address? {
            return self.accounts[name]
        }

        access(all) fun setAddress(_ name: String, address: Address){
            self.accounts[name] = address
            emit FlowManager.AccountAdded(address: address)
        }

        init(){
            self.accounts = {}
        }
    }

    access(all) view fun getAccountAddress(_ name: String): Address?{
        let accountManager = self.account
            .capabilities.borrow<&FlowManager.Mapper>(self.accountManagerPath)!

        return accountManager.getAddress(name)
    }

    access(all) let defaultAccounts: {Address : String}

    access(all) fun resolveDefaultAccounts(_ address: Address): Address{
        let alias = self.defaultAccounts[address]!
        return self.getAccountAddress(alias)!
    }

    access(all) let accountManagerStorage: StoragePath
    access(all) let contractManagerStorage: StoragePath
    access(all) let accountManagerPath: PublicPath
    access(all) let contractManagerPath: PublicPath

    /// Environment Manager
    access(all) event BlockOffsetChanged(offset: UInt64)
    access(all) event TimestampOffsetChanged(offset: UFix64)

    access(all) struct MockBlock {
        access(all) let id: [UInt8; 32]
        access(all) let height: UInt64
        access(all) let view: UInt64
        access(all) let timestamp: UFix64

        init(_ id: [UInt8; 32], _ height: UInt64, _ view: UInt64, _ timestamp: UFix64){
            self.id = id
            self.height = height
            self.view = view
            self.timestamp = timestamp
        }
    }

    access(all) fun setBlockOffset(_ offset: UInt64){
        self.blockOffset = offset
        emit FlowManager.BlockOffsetChanged(offset: offset)
    }

    access(all) fun setTimestampOffset(_ offset: UFix64){
        self.timestampOffset = offset
        emit FlowManager.TimestampOffsetChanged(offset: offset)
    }

    access(all) view fun getBlockHeight(): UInt64 {
        var block = getCurrentBlock()
        return block.height + self.blockOffset
    }

    access(all) view fun getBlockTimestamp(): UFix64 {
        var block = getCurrentBlock()
        return block.timestamp + self.timestampOffset
    }

    access(all) fun getBlock(): MockBlock {
        var block =  getCurrentBlock()
        let mockBlock = MockBlock(block.id, block.height, block.view, block.timestamp);
        return mockBlock
    }

    access(all) var blockOffset: UInt64;
    access(all) var timestampOffset: UFix64;


    // Initialize contract
    init(){
        // Environment defaults
        self.blockOffset = 0;
        self.timestampOffset = 0.0;

        // Account Manager initialization
        let accountManager = Mapper()
        let contractManager = Mapper()

        self.defaultAccounts = {
          0x01: "Alice",
          0x02: "Bob",
          0x03: "Charlie",
          0x04: "Dave",
          0x05: "Eve"
        }

        self.accountManagerStorage = /storage/testSuiteAccountManager
        self.contractManagerStorage = /storage/testSuiteContractManager

        self.accountManagerPath = /public/testSuiteAccountManager
        self.contractManagerPath = /public/testSuiteContractManager

        // Destroy previously stored values
        self.account.storage.load<Mapper>(from: self.accountManagerStorage)
        self.account.storage.load<Mapper>(from: self.contractManagerStorage)

        self.account.storage.save(accountManager, to: self.accountManagerStorage)
        self.account.storage.save(contractManager, to: self.contractManagerStorage)


        self.account.capabilities.publish(
            self.account.capabilities.storage.issue<&Mapper>(
              self.accountManagerStorage
            ), at: self.accountManagerPath)

        self.account.capabilities.publish(
            self.account.capabilities.storage.issue<&Mapper>(
              self.contractManagerStorage
            ), at: self.contractManagerPath)
    }
}