use serde::{Deserialize, Serialize};
use std::collections::HashMap;

#[derive(Debug, Clone, Serialize, Deserialize)]
/// Threshold values for qualitys.
pub struct QualityThresholds {
    pub max_complexity: u32,
    pub max_satd_items: usize,
    pub min_test_coverage: f64,
    pub max_duplication: f64,
}

#[derive(Debug, Clone)]
/// Result of quality gate operation.
pub struct QualityGateResult {
    pub passed: bool,
    pub violations: Vec<String>,
    pub metrics: HashMap<String, String>,
}

/// Quality gate runner.
pub struct QualityGateRunner {
    _analyzers: Vec<Box<dyn std::any::Any + Send>>,
    _thresholds: QualityThresholds,
}

impl QualityGateRunner {
    #[provable_contracts_macros::contract("pmat-core.yaml", equation = "check_compliance")]
    /// Create a new instance.
    pub fn new(
        analyzers: Vec<Box<dyn std::any::Any + Send>>,
        thresholds: QualityThresholds,
    ) -> Self {
        Self {
            _analyzers: analyzers,
            _thresholds: thresholds,
        }
    }

    #[provable_contracts_macros::contract("pmat-core.yaml", equation = "check_compliance")]
    pub async fn check(&self, _code: &str, _language: &str) -> QualityGateResult {
        // Simplified implementation for now
        let mut metrics = HashMap::new();
        metrics.insert("complexity".to_string(), "5".to_string());
        metrics.insert("satd_items".to_string(), "0".to_string());

        QualityGateResult {
            passed: true,
            violations: vec![],
            metrics,
        }
    }
}

#[cfg_attr(coverage_nightly, coverage(off))]
#[cfg(test)]
mod coverage_tests {
    use super::*;

    // QualityThresholds tests
    #[test]
    fn test_quality_thresholds_creation() {
        let thresholds = QualityThresholds {
            max_complexity: 10,
            max_satd_items: 5,
            min_test_coverage: 80.0,
            max_duplication: 0.1,
        };
        assert_eq!(thresholds.max_complexity, 10);
        assert_eq!(thresholds.max_satd_items, 5);
        assert_eq!(thresholds.min_test_coverage, 80.0);
        assert_eq!(thresholds.max_duplication, 0.1);
    }

    #[test]
    fn test_quality_thresholds_clone() {
        let thresholds = QualityThresholds {
            max_complexity: 15,
            max_satd_items: 3,
            min_test_coverage: 90.0,
            max_duplication: 0.05,
        };
        let cloned = thresholds.clone();
        assert_eq!(thresholds.max_complexity, cloned.max_complexity);
        assert_eq!(thresholds.max_satd_items, cloned.max_satd_items);
        assert_eq!(thresholds.min_test_coverage, cloned.min_test_coverage);
        assert_eq!(thresholds.max_duplication, cloned.max_duplication);
    }

    #[test]
    fn test_quality_thresholds_debug() {
        let thresholds = QualityThresholds {
            max_complexity: 10,
            max_satd_items: 5,
            min_test_coverage: 80.0,
            max_duplication: 0.1,
        };
        let debug_str = format!("{:?}", thresholds);
        assert!(debug_str.contains("max_complexity"));
        assert!(debug_str.contains("10"));
    }

    #[test]
    fn test_quality_thresholds_serialization() {
        let thresholds = QualityThresholds {
            max_complexity: 20,
            max_satd_items: 10,
            min_test_coverage: 75.0,
            max_duplication: 0.15,
        };
        let json = serde_json::to_string(&thresholds).unwrap();
        let deserialized: QualityThresholds = serde_json::from_str(&json).unwrap();
        assert_eq!(thresholds.max_complexity, deserialized.max_complexity);
        assert_eq!(thresholds.max_satd_items, deserialized.max_satd_items);
        assert_eq!(thresholds.min_test_coverage, deserialized.min_test_coverage);
        assert_eq!(thresholds.max_duplication, deserialized.max_duplication);
    }

    #[test]
    fn test_quality_thresholds_deserialization() {
        let json = r#"{"max_complexity": 25, "max_satd_items": 8, "min_test_coverage": 85.5, "max_duplication": 0.08}"#;
        let thresholds: QualityThresholds = serde_json::from_str(json).unwrap();
        assert_eq!(thresholds.max_complexity, 25);
        assert_eq!(thresholds.max_satd_items, 8);
        assert_eq!(thresholds.min_test_coverage, 85.5);
        assert_eq!(thresholds.max_duplication, 0.08);
    }

    // QualityGateResult tests
    #[test]
    fn test_quality_gate_result_passed() {
        let result = QualityGateResult {
            passed: true,
            violations: vec![],
            metrics: HashMap::new(),
        };
        assert!(result.passed);
        assert!(result.violations.is_empty());
    }

    #[test]
    fn test_quality_gate_result_failed() {
        let result = QualityGateResult {
            passed: false,
            violations: vec!["Complexity too high".to_string()],
            metrics: HashMap::new(),
        };
        assert!(!result.passed);
        assert_eq!(result.violations.len(), 1);
    }

    #[test]
    fn test_quality_gate_result_with_metrics() {
        let mut metrics = HashMap::new();
        metrics.insert("complexity".to_string(), "15".to_string());
        metrics.insert("coverage".to_string(), "82%".to_string());

        let result = QualityGateResult {
            passed: true,
            violations: vec![],
            metrics,
        };
        assert_eq!(result.metrics.get("complexity"), Some(&"15".to_string()));
        assert_eq!(result.metrics.get("coverage"), Some(&"82%".to_string()));
    }

    #[test]
    fn test_quality_gate_result_clone() {
        let mut metrics = HashMap::new();
        metrics.insert("test".to_string(), "value".to_string());

        let result = QualityGateResult {
            passed: true,
            violations: vec!["warning".to_string()],
            metrics,
        };
        let cloned = result.clone();
        assert_eq!(result.passed, cloned.passed);
        assert_eq!(result.violations, cloned.violations);
        assert_eq!(result.metrics, cloned.metrics);
    }

    #[test]
    fn test_quality_gate_result_debug() {
        let result = QualityGateResult {
            passed: false,
            violations: vec!["test violation".to_string()],
            metrics: HashMap::new(),
        };
        let debug_str = format!("{:?}", result);
        assert!(debug_str.contains("passed"));
        assert!(debug_str.contains("violations"));
    }

    // QualityGateRunner tests
    #[test]
    fn test_quality_gate_runner_new() {
        let thresholds = QualityThresholds {
            max_complexity: 10,
            max_satd_items: 5,
            min_test_coverage: 80.0,
            max_duplication: 0.1,
        };
        let runner = QualityGateRunner::new(vec![], thresholds);
        let _ = runner;
    }

    #[test]
    fn test_quality_gate_runner_with_analyzers() {
        let thresholds = QualityThresholds {
            max_complexity: 10,
            max_satd_items: 5,
            min_test_coverage: 80.0,
            max_duplication: 0.1,
        };
        let analyzers: Vec<Box<dyn std::any::Any + Send>> =
            vec![Box::new(42i32), Box::new("test".to_string())];
        let runner = QualityGateRunner::new(analyzers, thresholds);
        let _ = runner;
    }

    #[tokio::test]
    async fn test_quality_gate_runner_check_empty_code() {
        let thresholds = QualityThresholds {
            max_complexity: 10,
            max_satd_items: 5,
            min_test_coverage: 80.0,
            max_duplication: 0.1,
        };
        let runner = QualityGateRunner::new(vec![], thresholds);
        let result = runner.check("", "rust").await;
        assert!(result.passed);
    }

    #[tokio::test]
    async fn test_quality_gate_runner_check_simple_code() {
        let thresholds = QualityThresholds {
            max_complexity: 10,
            max_satd_items: 5,
            min_test_coverage: 80.0,
            max_duplication: 0.1,
        };
        let runner = QualityGateRunner::new(vec![], thresholds);
        let code = "fn main() { println!(\"Hello\"); }";
        let result = runner.check(code, "rust").await;
        assert!(result.passed);
        assert!(result.violations.is_empty());
    }

    #[tokio::test]
    async fn test_quality_gate_runner_check_returns_metrics() {
        let thresholds = QualityThresholds {
            max_complexity: 10,
            max_satd_items: 5,
            min_test_coverage: 80.0,
            max_duplication: 0.1,
        };
        let runner = QualityGateRunner::new(vec![], thresholds);
        let result = runner.check("fn test() {}", "rust").await;
        assert!(result.metrics.contains_key("complexity"));
        assert!(result.metrics.contains_key("satd_items"));
        assert_eq!(result.metrics.get("complexity"), Some(&"5".to_string()));
        assert_eq!(result.metrics.get("satd_items"), Some(&"0".to_string()));
    }

    #[tokio::test]
    async fn test_quality_gate_runner_check_different_languages() {
        let thresholds = QualityThresholds {
            max_complexity: 10,
            max_satd_items: 5,
            min_test_coverage: 80.0,
            max_duplication: 0.1,
        };
        let runner = QualityGateRunner::new(vec![], thresholds);

        let result_rust = runner.check("fn main() {}", "rust").await;
        assert!(result_rust.passed);

        let result_python = runner.check("def main():\n    pass", "python").await;
        assert!(result_python.passed);

        let result_js = runner.check("function main() {}", "javascript").await;
        assert!(result_js.passed);
    }

    #[tokio::test]
    async fn test_quality_gate_runner_check_complex_code() {
        let thresholds = QualityThresholds {
            max_complexity: 10,
            max_satd_items: 5,
            min_test_coverage: 80.0,
            max_duplication: 0.1,
        };
        let runner = QualityGateRunner::new(vec![], thresholds);
        let complex_code = r#"
            fn complex() {
                for i in 0..10 {
                    for j in 0..10 {
                        if i == j {
                            println!("{}", i);
                        }
                    }
                }
            }
        "#;
        let result = runner.check(complex_code, "rust").await;
        // Currently always returns passed
        assert!(result.passed);
    }

    // Edge cases
    #[test]
    fn test_quality_thresholds_zero_values() {
        let thresholds = QualityThresholds {
            max_complexity: 0,
            max_satd_items: 0,
            min_test_coverage: 0.0,
            max_duplication: 0.0,
        };
        assert_eq!(thresholds.max_complexity, 0);
        assert_eq!(thresholds.max_satd_items, 0);
    }

    #[test]
    fn test_quality_thresholds_high_values() {
        let thresholds = QualityThresholds {
            max_complexity: u32::MAX,
            max_satd_items: usize::MAX,
            min_test_coverage: 100.0,
            max_duplication: 1.0,
        };
        assert_eq!(thresholds.max_complexity, u32::MAX);
        assert_eq!(thresholds.max_satd_items, usize::MAX);
    }

    #[test]
    fn test_quality_gate_result_multiple_violations() {
        let result = QualityGateResult {
            passed: false,
            violations: vec![
                "Violation 1".to_string(),
                "Violation 2".to_string(),
                "Violation 3".to_string(),
            ],
            metrics: HashMap::new(),
        };
        assert_eq!(result.violations.len(), 3);
    }

    #[test]
    fn test_quality_gate_result_many_metrics() {
        let mut metrics = HashMap::new();
        for i in 0..100 {
            metrics.insert(format!("metric_{}", i), format!("value_{}", i));
        }
        let result = QualityGateResult {
            passed: true,
            violations: vec![],
            metrics,
        };
        assert_eq!(result.metrics.len(), 100);
    }
}
