//! Regulatory submission readiness tests
//! Validates automated generation and submission of regulatory reports
#![allow(unused_crate_dependencies)]

use chrono::{DateTime, Duration, Utc};
use common::{OrderId, OrderSide, OrderType, Price, Quantity};
use std::collections::HashMap;
use tokio;
use trading_engine::compliance::*;

#[tokio::test]
async fn test_mifid_ii_rts22_report_generation() {
    // Test MiFID II RTS 22 transaction reporting
    let config = ComplianceConfig::default();
    let engine = ComplianceEngine::new(config);

    let context = create_compliance_context_with_order();
    let result = engine.assess_compliance(&context).await.unwrap();

    // Verify MiFID II compliance assessment
    assert!(matches!(
        result.mifid2_status,
        ComplianceStatus::Compliant | ComplianceStatus::Warning(_)
    ));

    // Test RTS 22 report fields
    assert!(result.assessment_timestamp <= Utc::now());
    assert!(result.compliance_score >= 0.0 && result.compliance_score <= 100.0);
}

#[tokio::test]
async fn test_sox_section_404_certification() {
    // Test SOX Section 404 management certification
    let mut config = ComplianceConfig::default();
    config.sox.management_certification_required = true;
    config.sox.internal_controls_testing = true;
    config.sox.section_404_enabled = true;

    let engine = ComplianceEngine::new(config);
    let context = create_compliance_context_with_order();

    let result = engine.assess_compliance(&context).await.unwrap();

    // Verify SOX compliance
    assert!(matches!(result.sox_status, ComplianceStatus::Compliant));

    // Check for SOX-specific findings
    let sox_findings: Vec<_> = result
        .findings
        .iter()
        .filter(|f| f.regulation.contains("SOX"))
        .collect();

    // Should have SOX compliance verification
    assert!(
        sox_findings.is_empty()
            || sox_findings.iter().all(|f| matches!(
                f.severity,
                ComplianceSeverity::Low | ComplianceSeverity::Info
            ))
    );
}

#[tokio::test]
async fn test_iso27001_isms_certification() {
    // Test ISO 27001 Information Security Management System
    let mut config = ComplianceConfig::default();
    config.data_protection.gdpr_enabled = true;
    config.data_protection.consent_management_enabled = true;

    let engine = ComplianceEngine::new(config);
    let context = create_compliance_context_with_client();

    let result = engine.assess_compliance(&context).await.unwrap();

    // Verify data protection compliance
    assert!(matches!(
        result.data_protection_status,
        ComplianceStatus::Compliant | ComplianceStatus::Warning(_)
    ));

    // Check GDPR compliance findings
    let gdpr_findings: Vec<_> = result
        .findings
        .iter()
        .filter(|f| f.regulation.contains("GDPR"))
        .collect();

    // Should handle GDPR requirements
    if !gdpr_findings.is_empty() {
        assert!(gdpr_findings
            .iter()
            .any(|f| f.remediation.contains("retention") || f.remediation.contains("consent")));
    }
}

#[tokio::test]
async fn test_automated_report_scheduling() {
    // Test automated regulatory report generation and scheduling
    let config = ComplianceConfig::default();
    let engine = ComplianceEngine::new(config);

    // Simulate daily reporting requirement
    let mut reporting_intervals = HashMap::new();
    reporting_intervals.insert("MiFID_II_DAILY".to_string(), Duration::days(1));
    reporting_intervals.insert("SOX_QUARTERLY".to_string(), Duration::days(90));
    reporting_intervals.insert("ISO27001_ANNUAL".to_string(), Duration::days(365));

    // Test each reporting interval
    for (report_type, _interval) in reporting_intervals {
        let context = create_compliance_context_with_order();
        let result = engine.assess_compliance(&context).await.unwrap();

        // Verify report can be generated
        assert!(!result.findings.is_empty() || result.compliance_score > 0.0);

        // Check timestamp is recent
        assert!(result.assessment_timestamp > Utc::now() - Duration::minutes(1));

        println!(
            "Generated {} report with score: {:.1}",
            report_type, result.compliance_score
        );
    }
}

#[tokio::test]
async fn test_regulatory_data_export() {
    // Test data export for regulatory submissions
    let config = ComplianceConfig::default();
    let engine = ComplianceEngine::new(config);

    let context = create_compliance_context_with_order();
    let result = engine.assess_compliance(&context).await.unwrap();

    // Test serialization for regulatory export
    let json_export = serde_json::to_string_pretty(&result).unwrap();
    assert!(json_export.contains("compliance_score"));
    assert!(json_export.contains("assessment_timestamp"));

    // Verify all required regulatory fields are present
    assert!(json_export.contains("mifid2_status"));
    assert!(json_export.contains("sox_status"));
    assert!(json_export.contains("data_protection_status"));

    // Test CSV-compatible data structure
    let findings_csv: Vec<String> = result
        .findings
        .iter()
        .map(|f| {
            format!(
                "{},{},{},{}",
                f.regulation,
                format!("{:?}", f.severity),
                f.description.replace(",", ";"),
                format!("{:?}", f.status)
            )
        })
        .collect();

    assert!(!findings_csv.is_empty() || result.compliance_score == 100.0);
}

#[tokio::test]
async fn test_audit_trail_export() {
    // Test audit trail export for regulatory examination
    let config = ComplianceConfig::default();
    let engine = ComplianceEngine::new(config);

    // Generate multiple compliance events
    for i in 0..10 {
        let mut context = create_compliance_context_with_order();

        // Modify order details for variety
        if let Some(ref mut order) = context.order_info {
            order.order_id = OrderId::new(); // Generate unique ID
            order.quantity = Quantity::from_f64(100.0 * (i as f64 + 1.0)).unwrap();
        }

        let result = engine.assess_compliance(&context).await.unwrap();

        // Verify each assessment generates findings
        assert!(result.compliance_score >= 0.0);
    }

    // Test comprehensive audit trail export
    let export_data = AuditTrailExport {
        export_timestamp: Utc::now(),
        total_assessments: 10,
        date_range: DateRange {
            start: Utc::now() - Duration::hours(1),
            end: Utc::now(),
        },
        compliance_summary: ComplianceSummary {
            average_score: 95.0,
            total_violations: 0,
            total_warnings: 2,
        },
    };

    // Verify export structure
    assert!(export_data.total_assessments == 10);
    assert!(export_data.compliance_summary.average_score >= 0.0);
}

#[tokio::test]
async fn test_regulatory_deadline_tracking() {
    // Test tracking of regulatory deadlines
    let config = ComplianceConfig::default();
    let engine = ComplianceEngine::new(config);

    let context = create_compliance_context_with_order();
    let result = engine.assess_compliance(&context).await.unwrap();

    // Check for findings with deadlines
    let findings_with_deadlines: Vec<_> = result
        .findings
        .iter()
        .filter(|f| f.due_date.is_some())
        .collect();

    // Verify deadline tracking
    for finding in findings_with_deadlines {
        let due_date = finding.due_date.unwrap();

        // Deadlines should be in the future
        assert!(due_date > Utc::now());

        // Deadlines should be reasonable (within regulatory timeframes)
        let days_until_due = (due_date - Utc::now()).num_days();
        assert!(days_until_due >= 0 && days_until_due <= 365);

        // Critical findings should have shorter deadlines
        if matches!(finding.severity, ComplianceSeverity::Critical) {
            assert!(days_until_due <= 7); // Critical items due within 1 week
        }
    }
}

#[tokio::test]
async fn test_cross_regulation_compliance() {
    // Test compliance across multiple regulations simultaneously
    let mut config = ComplianceConfig::default();
    config.mifid2.best_execution_enabled = true;
    config.mifid2.transaction_reporting_endpoint = Some("https://test.regulator.eu".to_string());
    config.sox.internal_controls_testing = true;
    config.mar.real_time_surveillance = true;
    config.data_protection.gdpr_enabled = true;

    let engine = ComplianceEngine::new(config);
    let context = create_compliance_context_with_order();

    let result = engine.assess_compliance(&context).await.unwrap();

    // Verify all regulations are assessed
    assert!(!matches!(
        result.mifid2_status,
        ComplianceStatus::NotApplicable
    ));
    assert!(!matches!(
        result.sox_status,
        ComplianceStatus::NotApplicable
    ));
    assert!(!matches!(
        result.mar_status,
        ComplianceStatus::NotApplicable
    ));
    assert!(!matches!(
        result.data_protection_status,
        ComplianceStatus::NotApplicable
    ));

    // Overall compliance should be determined correctly
    match result.status {
        ComplianceStatus::Compliant => {
            // All individual statuses should be compliant
            assert!(matches!(result.mifid2_status, ComplianceStatus::Compliant));
            assert!(matches!(result.sox_status, ComplianceStatus::Compliant));
        },
        ComplianceStatus::Warning(_) => {
            // At least one should have warnings, but no violations
            assert!(!matches!(
                result.mifid2_status,
                ComplianceStatus::Violation(_)
            ));
            assert!(!matches!(result.sox_status, ComplianceStatus::Violation(_)));
        },
        ComplianceStatus::Violation(_) => {
            // At least one should have violations
            // This is acceptable in test scenarios
        },
        _ => {}, // Other statuses acceptable for test
    }
}

// Helper functions and data structures

fn create_compliance_context_with_order() -> ComplianceContext {
    ComplianceContext {
        order_info: Some(OrderInfo {
            order_id: OrderId::new(),
            symbol: "AAPL".to_string(),
            side: OrderSide::Buy,
            quantity: Quantity::from_f64(1000.0).unwrap(),
            price: Some(Price::from_f64(150.0).unwrap()),
            order_type: OrderType::Limit,
            client_id: "COMPLIANCE_CLIENT_001".to_string(),
            timestamp: Utc::now(),
        }),
        client_info: Some(ClientInfo {
            client_id: "COMPLIANCE_CLIENT_001".to_string(),
            classification: ClientType::Professional,
            risk_tolerance: RiskTolerance::Moderate,
            jurisdiction: "EU".to_string(),
        }),
        market_context: Some(MarketContext {
            conditions: MarketConditions::Normal,
            session: TradingSession::Regular,
            volatility: 0.15,
        }),
        timestamp: Utc::now(),
    }
}

fn create_compliance_context_with_client() -> ComplianceContext {
    ComplianceContext {
        order_info: None,
        client_info: Some(ClientInfo {
            client_id: "DATA_PROTECTION_CLIENT".to_string(),
            classification: ClientType::Retail,
            risk_tolerance: RiskTolerance::Conservative,
            jurisdiction: "EU".to_string(),
        }),
        market_context: None,
        timestamp: Utc::now(),
    }
}

#[derive(Debug, Clone)]
struct AuditTrailExport {
    export_timestamp: DateTime<Utc>,
    total_assessments: u32,
    date_range: DateRange,
    compliance_summary: ComplianceSummary,
}

#[derive(Debug, Clone)]
struct DateRange {
    start: DateTime<Utc>,
    end: DateTime<Utc>,
}

#[derive(Debug, Clone)]
struct ComplianceSummary {
    average_score: f64,
    total_violations: u32,
    total_warnings: u32,
}