use anyhow::Result;
use clap::Subcommand;
use common::transaction::NSSATransaction;
use nssa::AccountId;

use crate::{
    WalletCore,
    cli::{SubcommandReturnValue, WalletSubcommand},
    helperfunctions::{AccountPrivacyKind, parse_addr_with_privacy_prefix},
    program_facades::native_token_transfer::NativeTokenTransfer,
};

/// Represents generic CLI subcommand for a wallet working with native token transfer program
#[derive(Subcommand, Debug, Clone)]
pub enum AuthTransferSubcommand {
    /// Initialize account under authenticated transfer program
    Init {
        /// account_id - valid 32 byte base58 string with privacy prefix
        #[arg(long)]
        account_id: String,
    },
    /// Send native tokens from one account to another with variable privacy
    ///
    /// If receiver is private, then `to` and (`to_npk` , `to_ipk`) is a mutually exclusive
    /// patterns.
    ///
    /// First is used for owned accounts, second otherwise.
    Send {
        /// from - valid 32 byte base58 string with privacy prefix
        #[arg(long)]
        from: String,
        /// to - valid 32 byte base58 string with privacy prefix
        #[arg(long)]
        to: Option<String>,
        /// to_npk - valid 32 byte hex string
        #[arg(long)]
        to_npk: Option<String>,
        /// to_ipk - valid 33 byte hex string
        #[arg(long)]
        to_ipk: Option<String>,
        /// amount - amount of balance to move
        #[arg(long)]
        amount: u128,
    },
}

impl WalletSubcommand for AuthTransferSubcommand {
    async fn handle_subcommand(
        self,
        wallet_core: &mut WalletCore,
    ) -> Result<SubcommandReturnValue> {
        match self {
            AuthTransferSubcommand::Init { account_id } => {
                let (account_id, addr_privacy) = parse_addr_with_privacy_prefix(&account_id)?;

                match addr_privacy {
                    AccountPrivacyKind::Public => {
                        let account_id = account_id.parse()?;

                        let res = NativeTokenTransfer(wallet_core)
                            .register_account(account_id)
                            .await?;

                        println!("Results of tx send are {res:#?}");

                        let transfer_tx =
                            wallet_core.poll_native_token_transfer(res.tx_hash).await?;

                        println!("Transaction data is {transfer_tx:?}");

                        let path = wallet_core.store_persistent_data().await?;

                        println!("Stored persistent accounts at {path:#?}");
                    }
                    AccountPrivacyKind::Private => {
                        let account_id = account_id.parse()?;

                        let (res, secret) = NativeTokenTransfer(wallet_core)
                            .register_account_private(account_id)
                            .await?;

                        println!("Results of tx send are {res:#?}");

                        let tx_hash = res.tx_hash;
                        let transfer_tx = wallet_core
                            .poll_native_token_transfer(tx_hash.clone())
                            .await?;

                        if let NSSATransaction::PrivacyPreserving(tx) = transfer_tx {
                            let acc_decode_data = vec![(secret, account_id)];

                            wallet_core.decode_insert_privacy_preserving_transaction_results(
                                tx,
                                &acc_decode_data,
                            )?;
                        }

                        let path = wallet_core.store_persistent_data().await?;

                        println!("Stored persistent accounts at {path:#?}");
                    }
                }

                Ok(SubcommandReturnValue::Empty)
            }
            AuthTransferSubcommand::Send {
                from,
                to,
                to_npk,
                to_ipk,
                amount,
            } => {
                let underlying_subcommand = match (to, to_npk, to_ipk) {
                    (None, None, None) => {
                        anyhow::bail!(
                            "Provide either account account_id of receiver or their public keys"
                        );
                    }
                    (Some(_), Some(_), Some(_)) => {
                        anyhow::bail!(
                            "Provide only one variant: either account account_id of receiver or their public keys"
                        );
                    }
                    (_, Some(_), None) | (_, None, Some(_)) => {
                        anyhow::bail!("List of public keys is uncomplete");
                    }
                    (Some(to), None, None) => {
                        let (from, from_privacy) = parse_addr_with_privacy_prefix(&from)?;
                        let (to, to_privacy) = parse_addr_with_privacy_prefix(&to)?;

                        match (from_privacy, to_privacy) {
                            (AccountPrivacyKind::Public, AccountPrivacyKind::Public) => {
                                NativeTokenTransferProgramSubcommand::Public { from, to, amount }
                            }
                            (AccountPrivacyKind::Private, AccountPrivacyKind::Private) => {
                                NativeTokenTransferProgramSubcommand::Private(
                                    NativeTokenTransferProgramSubcommandPrivate::PrivateOwned {
                                        from,
                                        to,
                                        amount,
                                    },
                                )
                            }
                            (AccountPrivacyKind::Private, AccountPrivacyKind::Public) => {
                                NativeTokenTransferProgramSubcommand::Deshielded {
                                    from,
                                    to,
                                    amount,
                                }
                            }
                            (AccountPrivacyKind::Public, AccountPrivacyKind::Private) => {
                                NativeTokenTransferProgramSubcommand::Shielded(
                                    NativeTokenTransferProgramSubcommandShielded::ShieldedOwned {
                                        from,
                                        to,
                                        amount,
                                    },
                                )
                            }
                        }
                    }
                    (None, Some(to_npk), Some(to_ipk)) => {
                        let (from, from_privacy) = parse_addr_with_privacy_prefix(&from)?;

                        match from_privacy {
                            AccountPrivacyKind::Private => {
                                NativeTokenTransferProgramSubcommand::Private(
                                    NativeTokenTransferProgramSubcommandPrivate::PrivateForeign {
                                        from,
                                        to_npk,
                                        to_ipk,
                                        amount,
                                    },
                                )
                            }
                            AccountPrivacyKind::Public => {
                                NativeTokenTransferProgramSubcommand::Shielded(
                                    NativeTokenTransferProgramSubcommandShielded::ShieldedForeign {
                                        from,
                                        to_npk,
                                        to_ipk,
                                        amount,
                                    },
                                )
                            }
                        }
                    }
                };

                underlying_subcommand.handle_subcommand(wallet_core).await
            }
        }
    }
}

/// Represents generic CLI subcommand for a wallet working with native token transfer program
#[derive(Subcommand, Debug, Clone)]
pub enum NativeTokenTransferProgramSubcommand {
    /// Send native token transfer from `from` to `to` for `amount`
    ///
    /// Public operation
    Public {
        /// from - valid 32 byte hex string
        #[arg(long)]
        from: String,
        /// to - valid 32 byte hex string
        #[arg(long)]
        to: String,
        /// amount - amount of balance to move
        #[arg(long)]
        amount: u128,
    },
    /// Private execution
    #[command(subcommand)]
    Private(NativeTokenTransferProgramSubcommandPrivate),
    /// Send native token transfer from `from` to `to` for `amount`
    ///
    /// Deshielded operation
    Deshielded {
        /// from - valid 32 byte hex string
        #[arg(long)]
        from: String,
        /// to - valid 32 byte hex string
        #[arg(long)]
        to: String,
        /// amount - amount of balance to move
        #[arg(long)]
        amount: u128,
    },
    /// Shielded execution
    #[command(subcommand)]
    Shielded(NativeTokenTransferProgramSubcommandShielded),
}

/// Represents generic shielded CLI subcommand for a wallet working with native token transfer
/// program
#[derive(Subcommand, Debug, Clone)]
pub enum NativeTokenTransferProgramSubcommandShielded {
    /// Send native token transfer from `from` to `to` for `amount`
    ///
    /// Shielded operation
    ShieldedOwned {
        /// from - valid 32 byte hex string
        #[arg(long)]
        from: String,
        /// to - valid 32 byte hex string
        #[arg(long)]
        to: String,
        /// amount - amount of balance to move
        #[arg(long)]
        amount: u128,
    },
    /// Send native token transfer from `from` to `to` for `amount`
    ///
    /// Shielded operation
    ShieldedForeign {
        /// from - valid 32 byte hex string
        #[arg(long)]
        from: String,
        /// to_npk - valid 32 byte hex string
        #[arg(long)]
        to_npk: String,
        /// to_ipk - valid 33 byte hex string
        #[arg(long)]
        to_ipk: String,
        /// amount - amount of balance to move
        #[arg(long)]
        amount: u128,
    },
}

/// Represents generic private CLI subcommand for a wallet working with native token transfer
/// program
#[derive(Subcommand, Debug, Clone)]
pub enum NativeTokenTransferProgramSubcommandPrivate {
    /// Send native token transfer from `from` to `to` for `amount`
    ///
    /// Private operation
    PrivateOwned {
        /// from - valid 32 byte hex string
        #[arg(long)]
        from: String,
        /// to - valid 32 byte hex string
        #[arg(long)]
        to: String,
        /// amount - amount of balance to move
        #[arg(long)]
        amount: u128,
    },
    /// Send native token transfer from `from` to `to` for `amount`
    ///
    /// Private operation
    PrivateForeign {
        /// from - valid 32 byte hex string
        #[arg(long)]
        from: String,
        /// to_npk - valid 32 byte hex string
        #[arg(long)]
        to_npk: String,
        /// to_ipk - valid 33 byte hex string
        #[arg(long)]
        to_ipk: String,
        /// amount - amount of balance to move
        #[arg(long)]
        amount: u128,
    },
}

impl WalletSubcommand for NativeTokenTransferProgramSubcommandPrivate {
    async fn handle_subcommand(
        self,
        wallet_core: &mut WalletCore,
    ) -> Result<SubcommandReturnValue> {
        match self {
            NativeTokenTransferProgramSubcommandPrivate::PrivateOwned { from, to, amount } => {
                let from: AccountId = from.parse().unwrap();
                let to: AccountId = to.parse().unwrap();

                let (res, [secret_from, secret_to]) = NativeTokenTransfer(wallet_core)
                    .send_private_transfer_to_owned_account(from, to, amount)
                    .await?;

                println!("Results of tx send are {res:#?}");

                let tx_hash = res.tx_hash;
                let transfer_tx = wallet_core
                    .poll_native_token_transfer(tx_hash.clone())
                    .await?;

                if let NSSATransaction::PrivacyPreserving(tx) = transfer_tx {
                    let acc_decode_data = vec![(secret_from, from), (secret_to, to)];

                    wallet_core.decode_insert_privacy_preserving_transaction_results(
                        tx,
                        &acc_decode_data,
                    )?;
                }

                let path = wallet_core.store_persistent_data().await?;

                println!("Stored persistent accounts at {path:#?}");

                Ok(SubcommandReturnValue::PrivacyPreservingTransfer { tx_hash })
            }
            NativeTokenTransferProgramSubcommandPrivate::PrivateForeign {
                from,
                to_npk,
                to_ipk,
                amount,
            } => {
                let from: AccountId = from.parse().unwrap();
                let to_npk_res = hex::decode(to_npk)?;
                let mut to_npk = [0; 32];
                to_npk.copy_from_slice(&to_npk_res);
                let to_npk = nssa_core::NullifierPublicKey(to_npk);

                let to_ipk_res = hex::decode(to_ipk)?;
                let mut to_ipk = [0u8; 33];
                to_ipk.copy_from_slice(&to_ipk_res);
                let to_ipk =
                    nssa_core::encryption::shared_key_derivation::Secp256k1Point(to_ipk.to_vec());

                let (res, [secret_from, _]) = NativeTokenTransfer(wallet_core)
                    .send_private_transfer_to_outer_account(from, to_npk, to_ipk, amount)
                    .await?;

                println!("Results of tx send are {res:#?}");

                let tx_hash = res.tx_hash;
                let transfer_tx = wallet_core
                    .poll_native_token_transfer(tx_hash.clone())
                    .await?;

                if let NSSATransaction::PrivacyPreserving(tx) = transfer_tx {
                    let acc_decode_data = vec![(secret_from, from)];

                    wallet_core.decode_insert_privacy_preserving_transaction_results(
                        tx,
                        &acc_decode_data,
                    )?;
                }

                let path = wallet_core.store_persistent_data().await?;

                println!("Stored persistent accounts at {path:#?}");

                Ok(SubcommandReturnValue::PrivacyPreservingTransfer { tx_hash })
            }
        }
    }
}

impl WalletSubcommand for NativeTokenTransferProgramSubcommandShielded {
    async fn handle_subcommand(
        self,
        wallet_core: &mut WalletCore,
    ) -> Result<SubcommandReturnValue> {
        match self {
            NativeTokenTransferProgramSubcommandShielded::ShieldedOwned { from, to, amount } => {
                let from: AccountId = from.parse().unwrap();
                let to: AccountId = to.parse().unwrap();

                let (res, secret) = NativeTokenTransfer(wallet_core)
                    .send_shielded_transfer(from, to, amount)
                    .await?;

                println!("Results of tx send are {res:#?}");

                let tx_hash = res.tx_hash;
                let transfer_tx = wallet_core
                    .poll_native_token_transfer(tx_hash.clone())
                    .await?;

                if let NSSATransaction::PrivacyPreserving(tx) = transfer_tx {
                    let acc_decode_data = vec![(secret, to)];

                    wallet_core.decode_insert_privacy_preserving_transaction_results(
                        tx,
                        &acc_decode_data,
                    )?;
                }

                let path = wallet_core.store_persistent_data().await?;

                println!("Stored persistent accounts at {path:#?}");

                Ok(SubcommandReturnValue::PrivacyPreservingTransfer { tx_hash })
            }
            NativeTokenTransferProgramSubcommandShielded::ShieldedForeign {
                from,
                to_npk,
                to_ipk,
                amount,
            } => {
                let from: AccountId = from.parse().unwrap();

                let to_npk_res = hex::decode(to_npk)?;
                let mut to_npk = [0; 32];
                to_npk.copy_from_slice(&to_npk_res);
                let to_npk = nssa_core::NullifierPublicKey(to_npk);

                let to_ipk_res = hex::decode(to_ipk)?;
                let mut to_ipk = [0u8; 33];
                to_ipk.copy_from_slice(&to_ipk_res);
                let to_ipk =
                    nssa_core::encryption::shared_key_derivation::Secp256k1Point(to_ipk.to_vec());

                let (res, _) = NativeTokenTransfer(wallet_core)
                    .send_shielded_transfer_to_outer_account(from, to_npk, to_ipk, amount)
                    .await?;

                println!("Results of tx send are {res:#?}");

                let tx_hash = res.tx_hash;

                let path = wallet_core.store_persistent_data().await?;

                println!("Stored persistent accounts at {path:#?}");

                Ok(SubcommandReturnValue::PrivacyPreservingTransfer { tx_hash })
            }
        }
    }
}

impl WalletSubcommand for NativeTokenTransferProgramSubcommand {
    async fn handle_subcommand(
        self,
        wallet_core: &mut WalletCore,
    ) -> Result<SubcommandReturnValue> {
        match self {
            NativeTokenTransferProgramSubcommand::Private(private_subcommand) => {
                private_subcommand.handle_subcommand(wallet_core).await
            }
            NativeTokenTransferProgramSubcommand::Shielded(shielded_subcommand) => {
                shielded_subcommand.handle_subcommand(wallet_core).await
            }
            NativeTokenTransferProgramSubcommand::Deshielded { from, to, amount } => {
                let from: AccountId = from.parse().unwrap();
                let to: AccountId = to.parse().unwrap();

                let (res, secret) = NativeTokenTransfer(wallet_core)
                    .send_deshielded_transfer(from, to, amount)
                    .await?;

                println!("Results of tx send are {res:#?}");

                let tx_hash = res.tx_hash;
                let transfer_tx = wallet_core
                    .poll_native_token_transfer(tx_hash.clone())
                    .await?;

                if let NSSATransaction::PrivacyPreserving(tx) = transfer_tx {
                    let acc_decode_data = vec![(secret, from)];

                    wallet_core.decode_insert_privacy_preserving_transaction_results(
                        tx,
                        &acc_decode_data,
                    )?;
                }

                let path = wallet_core.store_persistent_data().await?;

                println!("Stored persistent accounts at {path:#?}");

                Ok(SubcommandReturnValue::PrivacyPreservingTransfer { tx_hash })
            }
            NativeTokenTransferProgramSubcommand::Public { from, to, amount } => {
                let from: AccountId = from.parse().unwrap();
                let to: AccountId = to.parse().unwrap();

                let res = NativeTokenTransfer(wallet_core)
                    .send_public_transfer(from, to, amount)
                    .await?;

                println!("Results of tx send are {res:#?}");

                let transfer_tx = wallet_core.poll_native_token_transfer(res.tx_hash).await?;

                println!("Transaction data is {transfer_tx:?}");

                let path = wallet_core.store_persistent_data().await?;

                println!("Stored persistent accounts at {path:#?}");

                Ok(SubcommandReturnValue::Empty)
            }
        }
    }
}