rocksmap 0.1.0

use crate::error::{Error, Result};
use rocksdb::{Options, DB};
use std::time::Duration;

/// Note: TTL filter implementation simplified for now
/// In this version we focus on providing placeholder API that will compile
/// Full TTL implementation requires more complex setup with RocksDB

/// Extension trait for RocksDB Options to add TTL support
pub trait OptionsExt {
    /// Set time-to-live for all keys in database or column family
    /// This is a placeholder implementation - a real implementation would
    /// configure the compaction filter factory properly
    fn set_ttl(&mut self, ttl: Duration) -> &mut Self;

    /// Disable TTL feature if previously set
    fn disable_ttl(&mut self) -> &mut Self;
}

impl OptionsExt for Options {
    fn set_ttl(&mut self, _ttl: Duration) -> &mut Self {
        // This is a placeholder implementation that will compile
        // A real implementation would configure compaction filter factory properly
        // to delete expired keys
        self
    }

    fn disable_ttl(&mut self) -> &mut Self {
        // Placeholder implementation
        self
    }
}

/// Utility functions for TTL management
pub mod ttl_utils {
    use super::*;
    use std::path::Path;

    /// Create a new RocksDB with TTL enabled for all data
    pub fn open_db_with_ttl<P: AsRef<Path>>(path: P, ttl: Duration) -> Result<DB> {
        let mut options = Options::default();
        options.create_if_missing(true);
        options.create_missing_column_families(true);
        options.set_ttl(ttl);

        DB::open(&options, path).map_err(Error::from)
    }

    /// Create a column family with TTL in an existing database
    pub fn create_cf_with_ttl(db: &mut DB, name: &str, ttl: Duration) -> Result<()> {
        let mut options = Options::default();
        options.set_ttl(ttl);

        db.create_cf(name, &options).map_err(Error::from)
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    use std::time::Duration;

    #[test]
    fn test_ttl_expiration() {
        use tempfile::TempDir;

        let temp_dir = TempDir::new().unwrap();
        let path = temp_dir.path();
        let ttl = Duration::from_secs(2);
        let db = ttl_utils::open_db_with_ttl(path, ttl).unwrap();

        db.put(b"test_key", b"test_value").unwrap();

        let value = db.get(b"test_key").unwrap().unwrap();
        assert_eq!(value, b"test_value");

        // Note: This is a placeholder test. Full TTL implementation with
        // automatic expiration would require a custom compaction filter.
        // For now, we just verify that the TTL-configured DB works for basic operations.

        // The key should still be there since we haven't implemented
        // automatic expiration yet
        let value_after = db.get(b"test_key").unwrap();
        assert!(
            value_after.is_some(),
            "Key should still exist in placeholder implementation"
        );
    }
}