wasm4pm 26.6.10

#![allow(clippy::all, dead_code)]
//! Action Dispatch Integration Tests
//!
//! Tests the action dispatch layer that converts RL action labels to
//! executable operations.

use wasm4pm::action_dispatch::{dispatch_action, DispatchError, DispatchOutcome, ExecutionContext};
use wasm4pm::RlAction;

#[test]
fn test_action_continue_integration() {
    let context = ExecutionContext::default();
    let result = dispatch_action(&RlAction::Continue, &context);

    assert!(result.is_ok());
    assert_eq!(result.unwrap(), DispatchOutcome::NoOp);
}

#[test]
fn test_action_scale_normal_state() {
    let context = ExecutionContext {
        health_level: 0,
        current_memory_mb: 512,
        current_timeout_ms: 30000,
        current_batch_size: 1000,
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Scale, &context);
    assert!(result.is_ok());

    if let DispatchOutcome::Scaled {
        memory_mb,
        timeout_ms,
        batch_size,
    } = result.unwrap()
    {
        // Normal state: maintain current resources
        assert_eq!(memory_mb, 512);
        assert_eq!(timeout_ms, 30000);
        assert_eq!(batch_size, 1000);
    } else {
        panic!("Expected Scaled outcome");
    }
}

#[test]
fn test_action_scale_warning_state() {
    let context = ExecutionContext {
        health_level: 1,
        current_memory_mb: 512,
        current_timeout_ms: 30000,
        current_batch_size: 1000,
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Scale, &context);
    assert!(result.is_ok());

    if let DispatchOutcome::Scaled {
        memory_mb,
        timeout_ms,
        batch_size,
    } = result.unwrap()
    {
        // Warning state: increase timeout for safety margin
        assert_eq!(memory_mb, 512); // unchanged
        assert_eq!(timeout_ms, 60000); // doubled
        assert_eq!(batch_size, 1000); // unchanged
    } else {
        panic!("Expected Scaled outcome");
    }
}

#[test]
fn test_action_scale_degraded_state() {
    let context = ExecutionContext {
        health_level: 2,
        current_memory_mb: 512,
        current_timeout_ms: 30000,
        current_batch_size: 1000,
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Scale, &context);
    assert!(result.is_ok());

    if let DispatchOutcome::Scaled {
        memory_mb,
        timeout_ms,
        batch_size,
    } = result.unwrap()
    {
        // Degraded state: reduce batch size, increase timeout
        assert_eq!(memory_mb, 256); // halved
        assert_eq!(timeout_ms, 60000); // doubled
        assert_eq!(batch_size, 500); // halved
    } else {
        panic!("Expected Scaled outcome");
    }
}

#[test]
fn test_action_scale_critical_state() {
    let context = ExecutionContext {
        health_level: 3,
        current_memory_mb: 512,
        current_timeout_ms: 30000,
        current_batch_size: 1000,
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Scale, &context);
    assert!(result.is_ok());

    if let DispatchOutcome::Scaled {
        memory_mb,
        timeout_ms,
        batch_size,
    } = result.unwrap()
    {
        // Critical state: aggressive reduction
        assert_eq!(memory_mb, 128); // quartered
        assert_eq!(timeout_ms, 90000); // tripled
        assert_eq!(batch_size, 250); // quartered
    } else {
        panic!("Expected Scaled outcome");
    }
}

#[test]
fn test_action_scale_failed_state() {
    let context = ExecutionContext {
        health_level: 4,
        current_memory_mb: 512,
        current_timeout_ms: 30000,
        current_batch_size: 1000,
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Scale, &context);
    assert!(result.is_ok());

    if let DispatchOutcome::Scaled {
        memory_mb,
        timeout_ms,
        batch_size,
    } = result.unwrap()
    {
        // Failed state: minimal resources (emergency mode)
        assert_eq!(memory_mb, 64);
        assert_eq!(timeout_ms, 5000);
        assert_eq!(batch_size, 50);
    } else {
        panic!("Expected Scaled outcome");
    }
}

#[test]
fn test_action_scale_respects_minimum_thresholds() {
    // Test with very low values to ensure minimum thresholds are enforced
    let context = ExecutionContext {
        health_level: 4,
        current_memory_mb: 32,    // below minimum
        current_timeout_ms: 1000, // below minimum
        current_batch_size: 10,   // below minimum
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Scale, &context);
    assert!(result.is_ok());

    if let DispatchOutcome::Scaled {
        memory_mb,
        timeout_ms,
        batch_size,
    } = result.unwrap()
    {
        // Should enforce minimum thresholds
        assert_eq!(memory_mb, 64); // min threshold
        assert_eq!(timeout_ms, 5000); // min threshold
        assert_eq!(batch_size, 50); // min threshold
    } else {
        panic!("Expected Scaled outcome");
    }
}

#[test]
fn test_action_retry_first_attempt() {
    let context = ExecutionContext {
        retry_count: 0,
        base_backoff_ms: 1000,
        max_retries: 3,
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Retry, &context);
    assert!(result.is_ok());

    if let DispatchOutcome::RetryInitiated { attempt, delay_ms } = result.unwrap() {
        assert_eq!(attempt, 1); // first retry
                                // Exponential: 1000 * 2^0 = 1000 + jitter(0..=1000) = [1000, 2000]
        assert!(
            delay_ms >= 1000 && delay_ms <= 2000,
            "delay_ms {} out of expected range [1000, 2000]",
            delay_ms
        );
    } else {
        panic!("Expected RetryInitiated outcome");
    }
}

#[test]
fn test_action_retry_second_attempt() {
    let context = ExecutionContext {
        retry_count: 1,
        base_backoff_ms: 1000,
        max_retries: 3,
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Retry, &context);
    assert!(result.is_ok());

    if let DispatchOutcome::RetryInitiated { attempt, delay_ms } = result.unwrap() {
        assert_eq!(attempt, 2); // second retry
                                // Exponential: 1000 * 2^1 = 2000 + jitter(0..=1000) = [2000, 3000]
        assert!(
            delay_ms >= 2000 && delay_ms <= 3000,
            "delay_ms {} out of expected range [2000, 3000]",
            delay_ms
        );
    } else {
        panic!("Expected RetryInitiated outcome");
    }
}

#[test]
fn test_action_retry_exponential_backoff() {
    let context = ExecutionContext {
        retry_count: 2,
        base_backoff_ms: 1000,
        max_retries: 3,
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Retry, &context);
    assert!(result.is_ok());

    if let DispatchOutcome::RetryInitiated { attempt, delay_ms } = result.unwrap() {
        assert_eq!(attempt, 3); // third retry
                                // Exponential: 1000 * 2^2 = 4000 + jitter(0..=1000) = [4000, 5000]
        assert!(
            delay_ms >= 4000 && delay_ms <= 5000,
            "delay_ms {} out of expected range [4000, 5000]",
            delay_ms
        );
    } else {
        panic!("Expected RetryInitiated outcome");
    }
}

#[test]
fn test_action_retry_max_retries_enforced() {
    let context = ExecutionContext {
        retry_count: 3,
        max_retries: 3,
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Retry, &context);
    assert!(result.is_err());
    assert_eq!(result.unwrap_err(), DispatchError::MaxRetriesExceeded);
}

#[test]
fn test_action_retry_exceeds_max_retries() {
    let context = ExecutionContext {
        retry_count: 5,
        max_retries: 3,
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Retry, &context);
    assert!(result.is_err());
    assert_eq!(result.unwrap_err(), DispatchError::MaxRetriesExceeded);
}

#[test]
fn test_action_retry_circuit_breaker_blocks() {
    let context = ExecutionContext {
        circuit_breaker_open: true,
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Retry, &context);
    assert!(result.is_err());
    assert_eq!(result.unwrap_err(), DispatchError::CircuitBreakerOpen);
}

#[test]
fn test_action_scale_circuit_breaker_blocks() {
    let context = ExecutionContext {
        circuit_breaker_open: true,
        health_level: 2,
        ..Default::default()
    };

    let result = dispatch_action(&RlAction::Scale, &context);
    assert!(result.is_err());
    assert_eq!(result.unwrap_err(), DispatchError::CircuitBreakerOpen);
}

#[test]
fn test_action_fallback_implemented() {
    let context = ExecutionContext::default();
    let result = dispatch_action(&RlAction::Fallback, &context);

    assert!(result.is_ok());
    if let DispatchOutcome::FallbackInitiated { algorithm } = result.unwrap() {
        assert_eq!(algorithm, "dfg");
    } else {
        panic!("Expected FallbackInitiated outcome");
    }
}

#[test]
fn test_action_restart_implemented() {
    let context = ExecutionContext::default();
    let result = dispatch_action(&RlAction::Restart, &context);

    assert!(result.is_ok());
    if let DispatchOutcome::RestartInitiated { state_cleared } = result.unwrap() {
        assert!(state_cleared);
    } else {
        panic!("Expected RestartInitiated outcome");
    }
}

#[test]
fn test_execution_context_factory_methods() {
    // Test default context
    let default_ctx = ExecutionContext::default();
    assert_eq!(default_ctx.health_level, 0);
    assert_eq!(default_ctx.current_memory_mb, 512);
    assert_eq!(default_ctx.current_timeout_ms, 30000);
    assert_eq!(default_ctx.current_batch_size, 1000);
    assert_eq!(default_ctx.retry_count, 0);
    assert_eq!(default_ctx.max_retries, 3);
    assert_eq!(default_ctx.base_backoff_ms, 1000);
    assert!(!default_ctx.circuit_breaker_open);

    // Test degraded context
    let degraded_ctx = ExecutionContext::degraded();
    assert_eq!(degraded_ctx.health_level, 2);
    assert_eq!(degraded_ctx.current_memory_mb, 256);
    assert_eq!(degraded_ctx.current_timeout_ms, 15000);
    assert_eq!(degraded_ctx.current_batch_size, 500);
    assert_eq!(degraded_ctx.retry_count, 1);

    // Test critical context
    let critical_ctx = ExecutionContext::critical();
    assert_eq!(critical_ctx.health_level, 3);
    assert_eq!(critical_ctx.current_memory_mb, 128);
    assert_eq!(critical_ctx.current_timeout_ms, 5000);
    assert_eq!(critical_ctx.current_batch_size, 100);
    assert_eq!(critical_ctx.retry_count, 2);
    assert!(critical_ctx.circuit_breaker_open);
}

#[test]
fn test_dispatch_outcome_descriptions() {
    assert_eq!(
        DispatchOutcome::NoOp.description(),
        "No operation performed"
    );
    assert_eq!(
        DispatchOutcome::Scaled {
            memory_mb: 256,
            timeout_ms: 60000,
            batch_size: 500
        }
        .description(),
        "Resources scaled"
    );
    assert_eq!(
        DispatchOutcome::RetryInitiated {
            attempt: 1,
            delay_ms: 1000
        }
        .description(),
        "Retry with backoff"
    );
    assert_eq!(
        DispatchOutcome::FallbackInitiated {
            algorithm: "dfg".to_string()
        }
        .description(),
        "Fallback algorithm"
    );
    assert_eq!(
        DispatchOutcome::RestartInitiated {
            state_cleared: true
        }
        .description(),
        "Component restart"
    );
    assert_eq!(
        DispatchOutcome::NotImplemented.description(),
        "Action not implemented"
    );
}

#[test]
fn test_all_rl_actions_dispatchable() {
    let context = ExecutionContext::default();

    // Test all 5 RL actions are dispatchable without panic
    let actions = [
        RlAction::Continue,
        RlAction::Scale,
        RlAction::Retry,
        RlAction::Fallback,
        RlAction::Restart,
    ];

    for action in &actions {
        let result = dispatch_action(action, &context);
        // All should return Ok (even if NotImplemented)
        assert!(
            result.is_ok(),
            "Action {:?} should dispatch successfully",
            action
        );
    }
}

#[test]
fn test_dispatch_error_display() {
    assert_eq!(
        format!("{}", DispatchError::CircuitBreakerOpen),
        "Circuit breaker is open"
    );
    assert_eq!(
        format!("{}", DispatchError::MaxRetriesExceeded),
        "Maximum retry attempts exceeded"
    );
    assert_eq!(
        format!("{}", DispatchError::InvalidParameters("test".to_string())),
        "Invalid parameters: test"
    );
    assert_eq!(
        format!("{}", DispatchError::ScalingFailed("test".to_string())),
        "Scaling failed: test"
    );
    assert_eq!(
        format!("{}", DispatchError::NotImplemented),
        "Action not implemented"
    );
}