//! TDD tests for engine fixes
//! These tests define expected behavior for engine execution and metrics recording

use rtx_etl::{
    Result,
    dag::{Task, TaskType},
    engine::EtlEngine,
    monitoring::EtlMetrics,
    quality::QualityMonitor,
    state::StateManager,
};
use std::collections::HashMap;
use std::sync::Arc;
use std::time::Duration;

#[tokio::test]
async fn test_task_has_config_field() {
    // Test that Task struct has config field for accessing task configuration
    let mut task = Task::new("test_task".to_string(), TaskType::Extract);

    // Should be able to access config field
    task.config
        .insert("source".to_string(), serde_json::json!("test_source"));
    task.config
        .insert("batch_size".to_string(), serde_json::json!(100));

    // Config should be accessible
    let source = task.config.get("source").unwrap();
    assert_eq!(source, &serde_json::json!("test_source"));

    let batch_size = task.config.get("batch_size").unwrap();
    assert_eq!(batch_size, &serde_json::json!(100));
}

#[tokio::test]
async fn test_metrics_record_task_execution_signature() {
    // Test that record_task_execution method accepts 4 parameters
    let metrics = EtlMetrics::new();

    let task_id = "test_task";
    let task_type = TaskType::Extract;
    let execution_time = Duration::from_millis(500);
    let success = true;

    // Should accept 4 parameters as currently implemented
    metrics
        .record_task_execution(task_id, &task_type, execution_time, success)
        .await;

    // Should be able to get task stats
    let stats = metrics.get_task_stats(task_id).await;
    assert!(stats.is_some());
}

#[tokio::test]
async fn test_state_manager_update_task_state() {
    // Test that StateManager has update_task_state method
    use rtx_etl::state::StateConfig;
    let state_manager = StateManager::new(StateConfig::default()).await.unwrap();

    let task_id = "test_task";
    let state_value = "completed_at_123456789";

    // Should be able to update task state
    state_manager
        .update_task_state(task_id, state_value)
        .await
        .unwrap();

    // Should be able to retrieve the state
    let retrieved_state = state_manager
        .get_state(&format!("task_state_{}", task_id))
        .await
        .unwrap();
    assert!(retrieved_state.is_some());
}

#[tokio::test]
async fn test_quality_monitor_record_score() {
    // Test that QualityMonitor has record_quality_score method
    let quality_monitor = QualityMonitor::new().await.unwrap();

    let task_id = "test_task";
    let quality_score = 0.95;

    // Should be able to record quality score
    quality_monitor
        .record_quality_score(task_id, quality_score)
        .await
        .unwrap();

    // Should be able to get quality metrics
    let metrics = quality_monitor
        .get_task_quality_metrics(task_id)
        .await
        .unwrap();
    assert!(metrics.is_some());
}

#[tokio::test]
async fn test_metrics_record_batch_processed_signature() {
    // Test that record_batch_processed method accepts correct parameters
    let metrics = EtlMetrics::new();

    let record_count = 100_usize;
    let processing_time = Duration::from_millis(1000);

    // Should accept 2 parameters: usize and Duration
    metrics
        .record_batch_processed(record_count, processing_time)
        .await;

    // Should be able to get batch stats
    let batch_stats = metrics.get_batch_stats().await;
    assert_eq!(batch_stats.total_batches, 1);
    assert_eq!(batch_stats.total_records, 100);
}

#[tokio::test]
async fn test_metrics_additional_methods() {
    // Test that EtlMetrics has additional methods needed by engine
    let metrics = EtlMetrics::new();

    let task_id = "test_task";

    // Should have record_data_loaded method
    metrics.record_data_loaded(task_id, 50).await.unwrap();

    // Should have record_validation_results method
    let validation_results = serde_json::json!({"passed": 45, "failed": 5});
    metrics
        .record_validation_results(task_id, &validation_results)
        .await
        .unwrap();

    // Should have record_aggregation_computed method
    metrics
        .record_aggregation_computed(task_id, 10)
        .await
        .unwrap();

    // Should have record_generic_task_completed method
    metrics
        .record_generic_task_completed(task_id, 100)
        .await
        .unwrap();
}

#[tokio::test]
async fn test_task_priority_type_exists() {
    // Test that TaskPriority type exists and is usable
    use rtx_etl::dag::TaskPriority;

    let priority = TaskPriority::default();

    // Should be a valid priority value
    match priority {
        TaskPriority::Low | TaskPriority::Medium | TaskPriority::High | TaskPriority::Critical => {
            // Valid priority types
        }
    }
}

#[tokio::test]
async fn test_engine_functions_not_in_impl() {
    // Test that standalone engine functions work correctly
    let engine = EtlEngine::new().await.unwrap();

    // Should be able to get execution status
    let execution_id = uuid::Uuid::new_v4();
    let status = engine.get_execution_status(execution_id).await;
    assert!(status.is_none()); // No execution yet

    // Should be able to get metrics
    let metrics = engine.get_metrics().await;
    assert!(metrics.get_overall_stats().await.total_tasks_executed >= 0);
}