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use super::{OverlayAccount, State};
use cfx_statedb::Result as DbResult;
use cfx_types::{
    Address, AddressSpaceUtil, AddressWithSpace, Space, H256, U256,
};
use primitives::{Account, StorageLayout};

impl State {
    pub fn new_contract_with_admin(
        &mut self, contract: &AddressWithSpace, admin: &Address, balance: U256,
        storage_layout: Option<StorageLayout>, cip107: bool,
    ) -> DbResult<()> {
        assert!(contract.space == Space::Native || admin.is_zero());
        // Check if the new contract is deployed on a killed contract in the
        // same block.
        let pending_db_clear = self
            .read_account_lock(contract)?
            .map_or(false, |overlay| overlay.pending_db_clear());
        let account = OverlayAccount::new_contract_with_admin(
            contract,
            balance,
            admin,
            pending_db_clear,
            storage_layout,
            cip107,
        );
        self.insert_to_cache(account);
        Ok(())
    }

    /// Kill a contract
    pub fn remove_contract(
        &mut self, address: &AddressWithSpace,
    ) -> DbResult<()> {
        self.insert_to_cache(OverlayAccount::new_removed(address));

        Ok(())
    }

    /// A special implementation to achieve the backward compatible for the
    /// genesis (incorrect) behaviour.
    pub fn genesis_special_remove_account(
        &mut self, address: &Address,
    ) -> DbResult<()> {
        let address = address.with_native_space();
        let mut account = Account::new_empty(&address);
        account.code_hash = H256::default();
        *self.write_account_or_new_lock(&address)? =
            OverlayAccount::from_loaded(&address, account);
        Ok(())
    }
}

impl State {
    #[cfg(test)]
    pub fn new_contract_with_code(
        &mut self, contract: &AddressWithSpace, balance: U256,
    ) -> DbResult<()> {
        self.new_contract(contract, balance)?;
        self.init_code(&contract, vec![0x12, 0x34], Address::zero())?;
        Ok(())
    }

    #[cfg(test)]
    pub fn new_contract(
        &mut self, contract: &AddressWithSpace, balance: U256,
    ) -> DbResult<()> {
        use primitives::storage::STORAGE_LAYOUT_REGULAR_V0;

        let pending_db_clear = self
            .read_account_lock(contract)?
            .map_or(false, |acc| acc.pending_db_clear());
        let account = OverlayAccount::new_contract(
            &contract.address,
            balance,
            pending_db_clear,
            Some(STORAGE_LAYOUT_REGULAR_V0),
        );
        self.insert_to_cache(account);
        Ok(())
    }
}