light-token 0.23.0

use borsh::BorshSerialize;
use light_token_types::{
    instructions::extensions::compressible::CompressibleExtensionInstructionData,
    state::TokenDataVersion,
};
use solana_account_info::AccountInfo;
use solana_instruction::Instruction;
use solana_pubkey::Pubkey;

use crate::error::{LightTokenError, LightTokenResult};

/// Discriminators for create ATA instructions
const CREATE_ATA_DISCRIMINATOR: u8 = 100;
const CREATE_ATA_IDEMPOTENT_DISCRIMINATOR: u8 = 102;

/// Input parameters for creating an associated token account with compressible extension
#[derive(Debug, Clone)]
pub struct CreateCompressibleAssociatedTokenAccountInputs {
    /// The payer for the account creation
    pub payer: Pubkey,
    /// The owner of the associated token account
    pub owner: Pubkey,
    /// The mint for the associated token account
    pub mint: Pubkey,
    /// The CompressibleConfig account
    pub compressible_config: Pubkey,
    /// The recipient of lamports when the account is closed by rent authority (fee_payer_pda)
    pub rent_sponsor: Pubkey,
    /// Number of epochs of rent to prepay
    pub pre_pay_num_epochs: u8,
    /// Initial lamports to top up for rent payments (optional)
    pub lamports_per_write: Option<u32>,
    /// Version of the compressed token account when ctoken account is
    /// compressed and closed. (The version specifies the hashing scheme.)
    pub token_account_version: TokenDataVersion,
}

/// Creates a compressible associated token account instruction (non-idempotent)
pub fn create_compressible_associated_token_account(
    inputs: CreateCompressibleAssociatedTokenAccountInputs,
) -> LightTokenResult<Instruction> {
    create_compressible_associated_token_account_with_mode::<false>(inputs)
}

/// Creates a compressible associated token account instruction (idempotent)
pub fn create_compressible_associated_token_account_idempotent(
    inputs: CreateCompressibleAssociatedTokenAccountInputs,
) -> LightTokenResult<Instruction> {
    create_compressible_associated_token_account_with_mode::<true>(inputs)
}

/// Creates a compressible associated token account instruction with compile-time idempotent mode
pub fn create_compressible_associated_token_account_with_mode<const IDEMPOTENT: bool>(
    inputs: CreateCompressibleAssociatedTokenAccountInputs,
) -> LightTokenResult<Instruction> {
    let ata_pubkey = derive_associated_token_account(&inputs.owner, &inputs.mint);
    create_ata_instruction_unified::<IDEMPOTENT, true>(
        inputs.payer,
        inputs.owner,
        inputs.mint,
        ata_pubkey,
        Some((
            inputs.pre_pay_num_epochs,
            inputs.lamports_per_write,
            inputs.rent_sponsor,
            inputs.compressible_config,
            inputs.token_account_version,
        )),
    )
}

/// Creates a basic associated token account instruction (non-idempotent)
pub fn create_associated_token_account(
    payer: Pubkey,
    owner: Pubkey,
    mint: Pubkey,
) -> LightTokenResult<Instruction> {
    create_associated_token_account_with_mode::<false>(payer, owner, mint)
}

/// Creates a basic associated token account instruction (idempotent)
pub fn create_associated_token_account_idempotent(
    payer: Pubkey,
    owner: Pubkey,
    mint: Pubkey,
) -> LightTokenResult<Instruction> {
    create_associated_token_account_with_mode::<true>(payer, owner, mint)
}

/// Creates a basic associated token account instruction with compile-time idempotent mode
pub fn create_associated_token_account_with_mode<const IDEMPOTENT: bool>(
    payer: Pubkey,
    owner: Pubkey,
    mint: Pubkey,
) -> LightTokenResult<Instruction> {
    let ata_pubkey = derive_associated_token_account(&owner, &mint);
    create_ata_instruction_unified::<IDEMPOTENT, false>(payer, owner, mint, ata_pubkey, None)
}

/// Unified function to create ATA instructions with compile-time configuration
fn create_ata_instruction_unified<const IDEMPOTENT: bool, const COMPRESSIBLE: bool>(
    payer: Pubkey,
    owner: Pubkey,
    mint: Pubkey,
    ata_pubkey: Pubkey,
    compressible_config: Option<(u8, Option<u32>, Pubkey, Pubkey, TokenDataVersion)>, // (pre_pay_num_epochs, lamports_per_write, rent_sponsor, compressible_config_account, token_account_version)
) -> LightTokenResult<Instruction> {
    // Select discriminator based on idempotent mode
    let discriminator = if IDEMPOTENT {
        CREATE_ATA_IDEMPOTENT_DISCRIMINATOR
    } else {
        CREATE_ATA_DISCRIMINATOR
    };

    // Create the instruction data struct
    let compressible_extension = if COMPRESSIBLE {
        if let Some((pre_pay_num_epochs, lamports_per_write, _, _, token_account_version)) =
            compressible_config
        {
            Some(CompressibleExtensionInstructionData {
                token_account_version: token_account_version as u8,
                rent_payment: pre_pay_num_epochs,
                compression_only: 0,
                write_top_up: lamports_per_write.unwrap_or(0),
                compress_to_account_pubkey: None, // Not used for ATA creation
            })
        } else {
            return Err(LightTokenError::InvalidAccountData);
        }
    } else {
        None
    };

    let instruction_data =
        light_token_interface::instructions::create_associated_token_account::CreateAssociatedTokenAccountInstructionData {
            compressible_config: compressible_extension,
        };

    // Serialize with Borsh
    let mut data = Vec::new();
    data.push(discriminator);
    instruction_data
        .serialize(&mut data)
        .map_err(|_| LightTokenError::SerializationError)?;

    // Build accounts list based on whether it's compressible
    let mut accounts = vec![
        solana_instruction::AccountMeta::new(payer, true), // fee_payer (signer)
        solana_instruction::AccountMeta::new(ata_pubkey, false), // associated_token_account
        solana_instruction::AccountMeta::new_readonly(Pubkey::new_from_array([0; 32]), false), // system_program
    ];

    // Add compressible-specific accounts
    if COMPRESSIBLE {
        if let Some((_, _, rent_sponsor, compressible_config_account, _)) = compressible_config {
            accounts.push(solana_instruction::AccountMeta::new_readonly(
                compressible_config_account,
                false,
            )); // compressible_config
            accounts.push(solana_instruction::AccountMeta::new(rent_sponsor, false));
            // fee_payer_pda (rent_sponsor)
        }
    }

    Ok(Instruction {
        program_id: Pubkey::from(light_token_types::COMPRESSED_TOKEN_PROGRAM_ID),
        accounts,
        data,
    })
}

pub fn derive_associated_token_account(owner: &Pubkey, mint: &Pubkey) -> Pubkey {
    Pubkey::find_program_address(
        &[
            owner.as_ref(),
            light_token_types::COMPRESSED_TOKEN_PROGRAM_ID.as_ref(),
            mint.as_ref(),
        ],
        &Pubkey::from(light_token_types::COMPRESSED_TOKEN_PROGRAM_ID),
    )
    .0
}

/// CPI wrapper to create a compressible c-token associated token account.
#[allow(clippy::too_many_arguments)]
pub fn create_associated_token_account_cpi<'info>(
    payer: AccountInfo<'info>,
    associated_token_account: AccountInfo<'info>,
    system_program: AccountInfo<'info>,
    compressible_config: AccountInfo<'info>,
    rent_sponsor: AccountInfo<'info>,
    authority: AccountInfo<'info>,
    mint: Pubkey,
    pre_pay_num_epochs: Option<u8>,
    lamports_per_write: Option<u32>,
) -> std::result::Result<(), solana_program_error::ProgramError> {
    let inputs = CreateCompressibleAssociatedTokenAccountInputs {
        payer: *payer.key,
        owner: *authority.key,
        mint,
        compressible_config: *compressible_config.key,
        rent_sponsor: *rent_sponsor.key,
        pre_pay_num_epochs: pre_pay_num_epochs.unwrap_or(2),
        lamports_per_write,
        token_account_version: TokenDataVersion::ShaFlat,
    };

    let ix = create_compressible_associated_token_account(inputs)?;

    solana_cpi::invoke(
        &ix,
        &[
            payer,
            associated_token_account,
            system_program,
            compressible_config,
            rent_sponsor,
            authority,
        ],
    )
}

/// CPI wrapper to create a compressible c-token associated token account
/// idempotently.
#[allow(clippy::too_many_arguments)]
pub fn create_associated_token_account_idempotent_cpi<'info>(
    payer: AccountInfo<'info>,
    associated_token_account: AccountInfo<'info>,
    system_program: AccountInfo<'info>,
    compressible_config: AccountInfo<'info>,
    rent_sponsor: AccountInfo<'info>,
    authority: Pubkey,
    mint: Pubkey,
    pre_pay_num_epochs: Option<u8>,
    lamports_per_write: Option<u32>,
) -> std::result::Result<(), solana_program_error::ProgramError> {
    let inputs = CreateCompressibleAssociatedTokenAccountInputs {
        payer: *payer.key,
        owner: authority,
        mint,
        compressible_config: *compressible_config.key,
        rent_sponsor: *rent_sponsor.key,
        pre_pay_num_epochs: pre_pay_num_epochs.unwrap_or(2),
        lamports_per_write,
        token_account_version: TokenDataVersion::ShaFlat,
    };

    let ix = create_compressible_associated_token_account_idempotent(inputs)?;

    solana_cpi::invoke(
        &ix,
        &[
            payer,
            associated_token_account,
            system_program,
            compressible_config,
            rent_sponsor,
        ],
    )
}