// Stub implementation for batch processing to avoid compilation issues
// This will be replaced with a proper async implementation later

// use crate::error::EventualiError; // Available for future error handling
use serde::{Deserialize, Serialize};
use std::sync::Arc;

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct BatchConfig {
    pub max_batch_size: usize,
    pub min_batch_size: usize,
    pub timeout_ms: u64,
    pub worker_pool_size: usize,
    pub parallel_processing: bool,
}

impl Default for BatchConfig {
    fn default() -> Self {
        Self {
            max_batch_size: 1000,
            min_batch_size: 10,
            timeout_ms: 100,
            worker_pool_size: 4,
            parallel_processing: true,
        }
    }
}

impl BatchConfig {
    pub fn high_throughput() -> Self {
        Self {
            max_batch_size: 5000,
            min_batch_size: 100,
            timeout_ms: 50,
            worker_pool_size: 8,
            parallel_processing: true,
        }
    }

    pub fn memory_optimized() -> Self {
        Self {
            max_batch_size: 500,
            min_batch_size: 5,
            timeout_ms: 200,
            worker_pool_size: 2,
            parallel_processing: false,
        }
    }

    pub fn low_latency() -> Self {
        Self {
            max_batch_size: 100,
            min_batch_size: 1,
            timeout_ms: 10,
            worker_pool_size: 4,
            parallel_processing: true,
        }
    }
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct BatchStats {
    pub total_items_processed: u64,
    pub total_batches_processed: u64,
    pub successful_batches: u64,
    pub failed_batches: u64,
    pub current_queue_depth: usize,
    pub max_queue_depth: usize,
    pub average_batch_size: f64,
    pub avg_batch_size: f64,
    pub success_rate: f64,
    pub avg_throughput_per_sec: f64,
    pub current_throughput_per_sec: f64,
    pub peak_throughput_per_sec: f64,
    pub avg_processing_time_ms: f64,
    pub total_processing_time_ms: u64,
}

impl Default for BatchStats {
    fn default() -> Self {
        Self {
            total_items_processed: 0,
            total_batches_processed: 0,
            successful_batches: 0,
            failed_batches: 0,
            current_queue_depth: 0,
            max_queue_depth: 0,
            average_batch_size: 0.0,
            avg_batch_size: 0.0,
            success_rate: 0.0,
            avg_throughput_per_sec: 0.0,
            current_throughput_per_sec: 0.0,
            peak_throughput_per_sec: 0.0,
            avg_processing_time_ms: 0.0,
            total_processing_time_ms: 0,
        }
    }
}

pub struct BatchProcessor<T> {
    _config: BatchConfig,
    _phantom: std::marker::PhantomData<T>,
}

impl<T> BatchProcessor<T> {
    pub fn new(config: BatchConfig) -> Self {
        Self {
            _config: config,
            _phantom: std::marker::PhantomData,
        }
    }

    pub fn get_stats(&self) -> BatchStats {
        BatchStats::default()
    }
}

pub struct EventBatchProcessor {
    _pool: Arc<crate::performance::ConnectionPool>,
}

impl EventBatchProcessor {
    pub fn new(pool: Arc<crate::performance::ConnectionPool>) -> Self {
        Self { _pool: pool }
    }
}