rustchain-community 1.0.0

//! Standards Compliance Framework
//!
//! Mathematical compliance verification for major regulatory frameworks

use crate::core::Result;
use crate::engine::Mission;
use super::engine::constraints::SMTConstraint;
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use chrono::{DateTime, Utc};

/// Supported compliance standards frameworks
#[derive(Debug, Clone, Hash, PartialEq, Eq, Serialize, Deserialize)]
#[allow(non_camel_case_types)]
pub enum StandardsFramework {
    GDPR,
    NIST_800_53,
    ISO27001,
    SOC2,
    HIPAA,
    PCI_DSS,
    FedRAMP,
    FISMA,
}

/// Compliance verification result
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ComplianceResult {
    pub compliant: bool,
    pub standard: StandardsFramework,
    pub risk_score: f64,
    pub violations: Vec<ComplianceViolation>,
    pub passed_constraints: usize,
    pub total_constraints: usize,
    pub mathematical_proof: Option<String>,
    pub execution_time_ms: u64,
    pub timestamp: DateTime<Utc>,
}

/// Compliance violation details
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ComplianceViolation {
    pub violation_id: String,
    pub violation_type: String,
    pub description: String,
    pub severity: String,
    pub step_id: Option<String>,
    pub remediation: Option<String>,
}

/// Standards constraint generator
pub struct StandardsConstraintGenerator {
    nist_rules: HashMap<String, String>,
    gdpr_rules: HashMap<String, String>,
    hipaa_rules: HashMap<String, String>,
    soc2_rules: HashMap<String, String>,
    iso27001_rules: HashMap<String, String>,
    pci_dss_rules: HashMap<String, String>,
}

impl StandardsConstraintGenerator {
    pub fn new() -> Self {
        Self {
            nist_rules: Self::load_nist_rules(),
            gdpr_rules: Self::load_gdpr_rules(),
            hipaa_rules: Self::load_hipaa_rules(),
            soc2_rules: Self::load_soc2_rules(),
            iso27001_rules: Self::load_iso27001_rules(),
            pci_dss_rules: Self::load_pci_dss_rules(),
        }
    }

    /// Generate constraints for specific standard
    pub fn generate_constraints(&self, standard: &StandardsFramework, mission: &Mission) -> Result<Vec<SMTConstraint>> {
        match standard {
            StandardsFramework::NIST_800_53 => self.generate_nist_constraints(mission),
            StandardsFramework::GDPR => self.generate_gdpr_constraints(mission),
            StandardsFramework::HIPAA => self.generate_hipaa_constraints(mission),
            StandardsFramework::SOC2 => self.generate_soc2_constraints(mission),
            StandardsFramework::ISO27001 => self.generate_iso27001_constraints(mission),
            StandardsFramework::PCI_DSS => self.generate_pci_constraints(mission),
            StandardsFramework::FedRAMP => self.generate_fedramp_constraints(mission),
            StandardsFramework::FISMA => self.generate_fisma_constraints(mission),
        }
    }

    fn generate_nist_constraints(&self, _mission: &Mission) -> Result<Vec<SMTConstraint>> {
        let mut constraints = Vec::new();
        
        // NIST 800-53 core security controls
        constraints.push(SMTConstraint {
            id: "nist_ac_1".to_string(),
            constraint_type: super::engine::constraints::ConstraintType::Compliance,
            expression: "(assert (access_control_policy_exists))".to_string(),
            description: "NIST AC-1: Access Control Policy".to_string(),
            severity: super::engine::constraints::ConstraintSeverity::Critical,
        });
        
        constraints.push(SMTConstraint {
            id: "nist_ia_1".to_string(),
            constraint_type: super::engine::constraints::ConstraintType::Compliance,
            expression: "(assert (identification_authentication_policy_exists))".to_string(),
            description: "NIST IA-1: Identification and Authentication Policy".to_string(),
            severity: super::engine::constraints::ConstraintSeverity::Critical,
        });

        Ok(constraints)
    }

    fn generate_gdpr_constraints(&self, _mission: &Mission) -> Result<Vec<SMTConstraint>> {
        let mut constraints = Vec::new();
        
        // GDPR Article 6 - Lawful basis
        constraints.push(SMTConstraint {
            id: "gdpr_art6".to_string(),
            constraint_type: super::engine::constraints::ConstraintType::Compliance,
            expression: "(assert (lawful_basis_exists))".to_string(),
            description: "GDPR Art. 6: Lawful basis for processing".to_string(),
            severity: super::engine::constraints::ConstraintSeverity::Critical,
        });
        
        // GDPR Article 25 - Data protection by design
        constraints.push(SMTConstraint {
            id: "gdpr_art25".to_string(),
            constraint_type: super::engine::constraints::ConstraintType::Compliance,
            expression: "(assert (privacy_by_design))".to_string(),
            description: "GDPR Art. 25: Data protection by design and by default".to_string(),
            severity: super::engine::constraints::ConstraintSeverity::High,
        });

        Ok(constraints)
    }

    fn generate_hipaa_constraints(&self, _mission: &Mission) -> Result<Vec<SMTConstraint>> {
        let mut constraints = Vec::new();
        
        constraints.push(SMTConstraint {
            id: "hipaa_164_502".to_string(),
            constraint_type: super::engine::constraints::ConstraintType::Compliance,
            expression: "(assert (phi_protection_implemented))".to_string(),
            description: "HIPAA 164.502: Protected Health Information safeguards".to_string(),
            severity: super::engine::constraints::ConstraintSeverity::Critical,
        });

        Ok(constraints)
    }

    fn generate_soc2_constraints(&self, _mission: &Mission) -> Result<Vec<SMTConstraint>> {
        let mut constraints = Vec::new();
        
        constraints.push(SMTConstraint {
            id: "soc2_security".to_string(),
            constraint_type: super::engine::constraints::ConstraintType::Compliance,
            expression: "(assert (security_principle_implemented))".to_string(),
            description: "SOC 2: Security trust principle".to_string(),
            severity: super::engine::constraints::ConstraintSeverity::High,
        });

        Ok(constraints)
    }

    fn generate_iso27001_constraints(&self, _mission: &Mission) -> Result<Vec<SMTConstraint>> {
        let mut constraints = Vec::new();
        
        constraints.push(SMTConstraint {
            id: "iso27001_a5".to_string(),
            constraint_type: super::engine::constraints::ConstraintType::Compliance,
            expression: "(assert (information_security_policies))".to_string(),
            description: "ISO 27001 A.5: Information security policies".to_string(),
            severity: super::engine::constraints::ConstraintSeverity::High,
        });

        Ok(constraints)
    }

    fn generate_pci_constraints(&self, _mission: &Mission) -> Result<Vec<SMTConstraint>> {
        let mut constraints = Vec::new();
        
        constraints.push(SMTConstraint {
            id: "pci_req1".to_string(),
            constraint_type: super::engine::constraints::ConstraintType::Compliance,
            expression: "(assert (firewall_configuration))".to_string(),
            description: "PCI DSS Req. 1: Firewall configuration".to_string(),
            severity: super::engine::constraints::ConstraintSeverity::Critical,
        });

        Ok(constraints)
    }

    fn generate_fedramp_constraints(&self, mission: &Mission) -> Result<Vec<SMTConstraint>> {
        // FedRAMP is based on NIST 800-53, so reuse NIST constraints
        self.generate_nist_constraints(mission)
    }

    fn generate_fisma_constraints(&self, mission: &Mission) -> Result<Vec<SMTConstraint>> {
        // FISMA is also based on NIST 800-53
        self.generate_nist_constraints(mission)
    }

    // Rule loading functions (simplified for mitosis)
    fn load_nist_rules() -> HashMap<String, String> {
        let mut rules = HashMap::new();
        rules.insert("AC-1".to_string(), "Access Control Policy and Procedures".to_string());
        rules.insert("IA-1".to_string(), "Identification and Authentication Policy".to_string());
        rules
    }

    fn load_gdpr_rules() -> HashMap<String, String> {
        let mut rules = HashMap::new();
        rules.insert("Art6".to_string(), "Lawful basis for processing".to_string());
        rules.insert("Art25".to_string(), "Data protection by design and by default".to_string());
        rules
    }

    fn load_hipaa_rules() -> HashMap<String, String> {
        let mut rules = HashMap::new();
        rules.insert("164.502".to_string(), "Uses and disclosures of PHI".to_string());
        rules
    }

    fn load_soc2_rules() -> HashMap<String, String> {
        let mut rules = HashMap::new();
        rules.insert("Security".to_string(), "Security trust service principle".to_string());
        rules
    }

    fn load_iso27001_rules() -> HashMap<String, String> {
        let mut rules = HashMap::new();
        rules.insert("A.5".to_string(), "Information security policies".to_string());
        rules
    }

    fn load_pci_dss_rules() -> HashMap<String, String> {
        let mut rules = HashMap::new();
        rules.insert("Req1".to_string(), "Install and maintain firewall configuration".to_string());
        rules
    }
}