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/*
 * ‌
 * Hedera Rust SDK
 * ​
 * Copyright (C) 2022 - 2023 Hedera Hashgraph, LLC
 * ​
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ‍
 */

use hedera_proto::services;
use hedera_proto::services::token_service_client::TokenServiceClient;
use tonic::transport::Channel;

use crate::ledger_id::RefLedgerId;
use crate::protobuf::{
    FromProtobuf,
    ToProtobuf,
};
use crate::transaction::{
    AnyTransactionData,
    ChunkInfo,
    ToSchedulableTransactionDataProtobuf,
    ToTransactionDataProtobuf,
    TransactionData,
    TransactionExecute,
};
use crate::{
    AccountId,
    BoxGrpcFuture,
    Error,
    TokenId,
    Transaction,
    ValidateChecksums,
};

/// Grants KYC to the account for the given token. Must be signed by the Token's kycKey.
///
/// Once executed the Account is marked as KYC Granted.
///
/// - If the provided account is not found, the transaction will resolve to `INVALID_ACCOUNT_ID`.
/// - If the provided account has been deleted, the transaction will resolve to `ACCOUNT_DELETED`.
/// - If the provided token is not found, the transaction will resolve to `INVALID_TOKEN_ID`.
/// - If the provided token has been deleted, the transaction will resolve to `TOKEN_WAS_DELETED`.
/// - If an Association between the provided token and account is not found, the transaction will
/// resolve to `TOKEN_NOT_ASSOCIATED_TO_ACCOUNT`.
/// - If no KYC Key is defined, the transaction will resolve to `TOKEN_HAS_NO_KYC_KEY`.
pub type TokenGrantKycTransaction = Transaction<TokenGrantKycTransactionData>;

#[derive(Debug, Clone, Default)]
pub struct TokenGrantKycTransactionData {
    /// The account to be granted KYC.
    account_id: Option<AccountId>,

    /// The token for which this account will be granted KYC.
    token_id: Option<TokenId>,
}

impl TokenGrantKycTransaction {
    /// Returns the account to be granted KYC.
    #[must_use]
    pub fn get_account_id(&self) -> Option<AccountId> {
        self.data().account_id
    }

    /// Sets the account to be granted KYC.
    pub fn account_id(&mut self, account_id: AccountId) -> &mut Self {
        self.data_mut().account_id = Some(account_id);
        self
    }

    /// Returns the token for which the account will be granted KYC.
    #[must_use]
    pub fn get_token_id(&self) -> Option<TokenId> {
        self.data().token_id
    }

    /// Sets the token for which the account will be granted KYC.
    pub fn token_id(&mut self, token_id: impl Into<TokenId>) -> &mut Self {
        self.data_mut().token_id = Some(token_id.into());
        self
    }
}

impl TransactionData for TokenGrantKycTransactionData {}

impl TransactionExecute for TokenGrantKycTransactionData {
    fn execute(
        &self,
        channel: Channel,
        request: services::Transaction,
    ) -> BoxGrpcFuture<'_, services::TransactionResponse> {
        Box::pin(async {
            TokenServiceClient::new(channel).grant_kyc_to_token_account(request).await
        })
    }
}

impl ValidateChecksums for TokenGrantKycTransactionData {
    fn validate_checksums(&self, ledger_id: &RefLedgerId) -> Result<(), Error> {
        self.account_id.validate_checksums(ledger_id)?;
        self.token_id.validate_checksums(ledger_id)
    }
}

impl ToTransactionDataProtobuf for TokenGrantKycTransactionData {
    fn to_transaction_data_protobuf(
        &self,
        chunk_info: &ChunkInfo,
    ) -> services::transaction_body::Data {
        let _ = chunk_info.assert_single_transaction();

        services::transaction_body::Data::TokenGrantKyc(self.to_protobuf())
    }
}

impl ToSchedulableTransactionDataProtobuf for TokenGrantKycTransactionData {
    fn to_schedulable_transaction_data_protobuf(
        &self,
    ) -> services::schedulable_transaction_body::Data {
        services::schedulable_transaction_body::Data::TokenGrantKyc(self.to_protobuf())
    }
}

impl From<TokenGrantKycTransactionData> for AnyTransactionData {
    fn from(transaction: TokenGrantKycTransactionData) -> Self {
        Self::TokenGrantKyc(transaction)
    }
}

impl FromProtobuf<services::TokenGrantKycTransactionBody> for TokenGrantKycTransactionData {
    fn from_protobuf(pb: services::TokenGrantKycTransactionBody) -> crate::Result<Self> {
        Ok(Self {
            account_id: Option::from_protobuf(pb.account)?,
            token_id: Option::from_protobuf(pb.token)?,
        })
    }
}

impl ToProtobuf for TokenGrantKycTransactionData {
    type Protobuf = services::TokenGrantKycTransactionBody;

    fn to_protobuf(&self) -> Self::Protobuf {
        services::TokenGrantKycTransactionBody {
            token: self.token_id.to_protobuf(),
            account: self.account_id.to_protobuf(),
        }
    }
}