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use crate::accounts::account_header::AccountHeader;
use crate::accounts::devol_account::DevolAccount;

pub const BUFFER_ACCOUNT_TAG: u8 = 14;
pub const BUFFER_ACCOUNT_MIN_SIZE: usize = 40;
pub const BUFFER_ACCOUNT_VERSION: u8 = 1;

#[repr(C)]
#[derive(Clone, Copy)]
pub struct BufferAccount {
    pub header: AccountHeader, // 40 bytes
}

impl DevolAccount for BufferAccount {
    fn expected_size() -> usize { BUFFER_ACCOUNT_MIN_SIZE }

    fn expected_tag() -> u8 { BUFFER_ACCOUNT_TAG }

    fn expected_version() -> u32 { BUFFER_ACCOUNT_VERSION as u32 }
}

#[cfg(test)]
mod tests {
    use crate::utils::type_size_helper::align_size;
    use super::*;

    #[test]
    fn test_pools_log_offsets() {
        let real_size = std::mem::size_of::<BufferAccount>();
        assert_eq!(real_size, BUFFER_ACCOUNT_MIN_SIZE);
        assert_eq!(real_size, align_size(real_size, 4));
    }
}