//! Shared test case implementations
//! 
//! Contains common test logic that can be executed across different binding targets

use std::collections::HashMap;

/// Test outcome for cross-platform validation
#[derive(Debug, Clone)]
pub struct TestResult {
    pub passed: bool,
    pub error_message: Option<String>,
    pub metrics: TestMetrics,
}

#[derive(Debug, Clone)]
pub struct TestMetrics {
    pub execution_time_ms: u64,
    pub memory_usage_bytes: Option<u64>,
    pub block_count: Option<usize>,
    pub dimensions: Option<(i32, i32, i32)>,
}

impl TestResult {
    pub fn success(metrics: TestMetrics) -> Self {
        Self {
            passed: true,
            error_message: None,
            metrics,
        }
    }
    
    pub fn failure(error: String, metrics: TestMetrics) -> Self {
        Self {
            passed: false,
            error_message: Some(error),
            metrics,
        }
    }
}

/// Standard test: Create a new schematic and verify basic properties
pub fn test_schematic_creation() -> TestResult {
    let start_time = std::time::Instant::now();
    
    // This would be implemented by each binding target
    // For now, just return a mock success
    let metrics = TestMetrics {
        execution_time_ms: start_time.elapsed().as_millis() as u64,
        memory_usage_bytes: None,
        block_count: Some(0),
        dimensions: Some((16, 16, 16)),
    };
    
    TestResult::success(metrics)
}

/// Standard test: Load a schematic file and verify content
pub fn test_schematic_loading(file_data: &[u8]) -> TestResult {
    let start_time = std::time::Instant::now();
    
    if file_data.is_empty() {
        return TestResult::failure(
            "Empty file data".to_string(),
            TestMetrics {
                execution_time_ms: start_time.elapsed().as_millis() as u64,
                memory_usage_bytes: None,
                block_count: None,
                dimensions: None,
            }
        );
    }
    
    // Mock success for valid data
    let metrics = TestMetrics {
        execution_time_ms: start_time.elapsed().as_millis() as u64,
        memory_usage_bytes: Some(file_data.len() as u64),
        block_count: Some(42), // Mock block count
        dimensions: Some((5, 3, 7)), // Mock dimensions
    };
    
    TestResult::success(metrics)
}

/// Standard test: Create blocks with properties and verify
pub fn test_block_operations() -> TestResult {
    let start_time = std::time::Instant::now();
    
    // Mock block creation and property setting
    let test_blocks = vec![
        ("minecraft:stone", vec![("variant", "smooth")]),
        ("minecraft:oak_log", vec![("axis", "y")]),
        ("minecraft:redstone_wire", vec![("power", "15")]),
    ];
    
    // Simulate validation
    let all_valid = test_blocks.iter().all(|(name, props)| {
        !name.is_empty() && props.iter().all(|(k, v)| !k.is_empty() && !v.is_empty())
    });
    
    let metrics = TestMetrics {
        execution_time_ms: start_time.elapsed().as_millis() as u64,
        memory_usage_bytes: None,
        block_count: Some(test_blocks.len()),
        dimensions: Some((1, 1, test_blocks.len() as i32)),
    };
    
    if all_valid {
        TestResult::success(metrics)
    } else {
        TestResult::failure("Block validation failed".to_string(), metrics)
    }
}

/// Standard test: Convert between formats
pub fn test_format_conversion(input_format: &str, output_format: &str) -> TestResult {
    let start_time = std::time::Instant::now();
    
    let valid_formats = ["litematic", "schematic"];
    
    if !valid_formats.contains(&input_format) || !valid_formats.contains(&output_format) {
        return TestResult::failure(
            format!("Invalid format conversion: {} -> {}", input_format, output_format),
            TestMetrics {
                execution_time_ms: start_time.elapsed().as_millis() as u64,
                memory_usage_bytes: None,
                block_count: None,
                dimensions: None,
            }
        );
    }
    
    // Mock conversion success
    let metrics = TestMetrics {
        execution_time_ms: start_time.elapsed().as_millis() as u64,
        memory_usage_bytes: Some(1024), // Mock converted file size
        block_count: Some(100), // Mock preserved block count
        dimensions: Some((10, 5, 2)), // Mock preserved dimensions
    };
    
    TestResult::success(metrics)
}

/// Validate test results across multiple binding targets
pub fn validate_cross_platform_results(results: &HashMap<String, TestResult>) -> bool {
    if results.is_empty() {
        return false;
    }
    
    // All tests should pass
    let all_passed = results.values().all(|r| r.passed);
    
    if !all_passed {
        return false;
    }
    
    // Extract metrics for comparison
    let metrics: Vec<_> = results.values().map(|r| &r.metrics).collect();
    
    // Check that block counts are consistent (within reason)
    if let Some(first_count) = metrics[0].block_count {
        let counts_consistent = metrics.iter().all(|m| {
            m.block_count.map_or(true, |count| {
                // Allow for small variations due to implementation differences
                (count as i32 - first_count as i32).abs() <= 1
            })
        });
        
        if !counts_consistent {
            return false;
        }
    }
    
    // Check that dimensions are consistent
    if let Some(first_dims) = metrics[0].dimensions {
        let dims_consistent = metrics.iter().all(|m| {
            m.dimensions.map_or(true, |dims| dims == first_dims)
        });
        
        if !dims_consistent {
            return false;
        }
    }
    
    true
}

#[cfg(test)]
mod tests {
    use super::*;
    
    #[test]
    fn test_result_creation() {
        let metrics = TestMetrics {
            execution_time_ms: 100,
            memory_usage_bytes: Some(1024),
            block_count: Some(42),
            dimensions: Some((10, 10, 10)),
        };
        
        let success = TestResult::success(metrics.clone());
        assert!(success.passed);
        assert!(success.error_message.is_none());
        
        let failure = TestResult::failure("Test error".to_string(), metrics);
        assert!(!failure.passed);
        assert!(failure.error_message.is_some());
    }
    
    #[test]
    fn test_cross_platform_validation() {
        let mut results = HashMap::new();
        
        let metrics = TestMetrics {
            execution_time_ms: 100,
            memory_usage_bytes: Some(1024),
            block_count: Some(42),
            dimensions: Some((10, 10, 10)),
        };
        
        results.insert("wasm".to_string(), TestResult::success(metrics.clone()));
        results.insert("python".to_string(), TestResult::success(metrics.clone()));
        
        assert!(validate_cross_platform_results(&results));
    }
}
