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use async_trait::async_trait;
use std::pin::Pin;
#[allow(unused_imports)]
use tracing::{debug, error, info, warn};

use tokio::io::Result;

use crate::error::*;
use crate::event::*;
use crate::loader::*;
use crate::{crypto::*, redo::LogLookup};

#[async_trait]
pub trait LogFile
where
    Self: Sync + Send,
{
    #[cfg(feature = "enable_rotate")]
    async fn rotate(&mut self, header_bytes: Vec<u8>) -> Result<()>;

    fn backup(
        &mut self,
        include_active_files: bool,
    ) -> Result<Pin<Box<dyn futures::Future<Output = Result<()>> + Send + Sync>>>;

    async fn copy(&mut self) -> Result<Box<dyn LogFile>>;

    async fn write(
        &mut self,
        evt: &EventData,
    ) -> std::result::Result<LogLookup, SerializationError>;

    async fn copy_event(
        &mut self,
        from_log: &Box<dyn LogFile>,
        hash: AteHash,
    ) -> std::result::Result<LogLookup, LoadError>;

    async fn load(&self, hash: AteHash) -> std::result::Result<LoadData, LoadError>;

    fn move_log_file(&mut self, new_path: &String) -> Result<()>;

    async fn begin_flip(&self, header_bytes: Vec<u8>) -> Result<Box<dyn LogFile>>;

    async fn flush(&mut self) -> Result<()>;

    fn count(&self) -> usize;

    fn size(&self) -> u64;

    fn index(&self) -> u32;

    fn offset(&self) -> u64;

    fn header(&self, index: u32) -> Vec<u8>;

    fn destroy(&mut self) -> Result<()>;
}