tusktsk 2.1.3

use clap::Subcommand;
use serde::{Deserialize, Serialize};
use std::path::PathBuf;
use anyhow::Result;
use tracing::info;
use sha2::{Sha256, Digest};
use base64::{Engine as _, engine::general_purpose};
use argon2::{Argon2, PasswordHasher, password_hash::SaltString};
use chrono::{Utc, Duration};
use uuid::Uuid;

#[derive(Subcommand)]
pub enum SecurityCommand {
    /// Authenticate user
    Login {
        /// Username
        #[arg(short, long)]
        username: String,
        
        /// Password (will prompt if not provided)
        #[arg(short, long)]
        password: Option<String>,
        
        /// Remember login
        #[arg(long)]
        remember: bool,
        
        /// Two-factor authentication code
        #[arg(long)]
        totp: Option<String>,
        
        /// Force re-authentication
        #[arg(long)]
        force: bool,
    },
    
    /// Logout current user
    Logout {
        /// Logout from all sessions
        #[arg(long)]
        all: bool,
        
        /// Session ID to logout
        #[arg(long)]
        session: Option<String>,
    },
    
    /// Check authentication status
    Status {
        /// Show detailed session info
        #[arg(short, long)]
        verbose: bool,
        
        /// Check specific session
        #[arg(long)]
        session: Option<String>,
    },
    
    /// Security scan
    Scan {
        /// Directory to scan
        #[arg(short, long, default_value = ".")]
        path: PathBuf,
        
        /// Scan type (files, network, config)
        #[arg(long, default_value = "files")]
        scan_type: String,
        
        /// Output format (json, yaml, text)
        #[arg(long, default_value = "text")]
        format: String,
        
        /// Fix issues automatically
        #[arg(long)]
        fix: bool,
        
        /// Exclude patterns
        #[arg(long)]
        exclude: Vec<String>,
    },
    
    /// Encrypt data
    Encrypt {
        /// Data to encrypt
        #[arg(short, long)]
        data: String,
        
        /// Encryption algorithm (aes256, chacha20)
        #[arg(long, default_value = "aes256")]
        algorithm: String,
        
        /// Key file path
        #[arg(long)]
        key_file: Option<PathBuf>,
        
        /// Output file
        #[arg(short, long)]
        output: Option<PathBuf>,
        
        /// Use password-based encryption
        #[arg(long)]
        password: bool,
    },
    
    /// Decrypt data
    Decrypt {
        /// Data to decrypt
        #[arg(short, long)]
        data: String,
        
        /// Decryption algorithm (aes256, chacha20)
        #[arg(long, default_value = "aes256")]
        algorithm: String,
        
        /// Key file path
        #[arg(long)]
        key_file: Option<PathBuf>,
        
        /// Output file
        #[arg(short, long)]
        output: Option<PathBuf>,
        
        /// Use password-based decryption
        #[arg(long)]
        password: bool,
    },
    
    /// Generate hash
    Hash {
        /// Data to hash
        #[arg(short, long)]
        data: String,
        
        /// Hash algorithm (sha256, sha512, md5, argon2)
        #[arg(long, default_value = "sha256")]
        algorithm: String,
        
        /// Salt for hashing
        #[arg(long)]
        salt: Option<String>,
        
        /// Number of iterations
        #[arg(long, default_value = "10000")]
        iterations: u32,
        
        /// Output format (hex, base64, raw)
        #[arg(long, default_value = "hex")]
        format: String,
    },
    
    /// Security audit
    Audit {
        /// Audit scope (system, user, config, all)
        #[arg(long, default_value = "all")]
        scope: String,
        
        /// Output format (json, yaml, text)
        #[arg(long, default_value = "text")]
        format: String,
        
        /// Generate report
        #[arg(long)]
        report: Option<PathBuf>,
        
        /// Include recommendations
        #[arg(long)]
        recommendations: bool,
        
        /// Compliance check (gdpr, sox, pci)
        #[arg(long)]
        compliance: Option<String>,
    },
}



#[derive(Debug, Serialize, Deserialize)]
struct SecurityConfig {
    session_timeout: u64,
    max_sessions: usize,
    password_policy: PasswordPolicy,
    encryption: EncryptionConfig,
    audit: AuditConfig,
}

#[derive(Debug, Serialize, Deserialize)]
struct PasswordPolicy {
    min_length: usize,
    require_uppercase: bool,
    require_lowercase: bool,
    require_numbers: bool,
    require_special: bool,
    max_age_days: u32,
}

#[derive(Debug, Serialize, Deserialize)]
struct EncryptionConfig {
    default_algorithm: String,
    key_rotation_days: u32,
    key_storage_path: String,
}

#[derive(Debug, Serialize, Deserialize)]
struct AuditConfig {
    enabled: bool,
    log_path: String,
    retention_days: u32,
    sensitive_fields: Vec<String>,
}

#[derive(Debug, Serialize, Deserialize)]
struct Session {
    id: String,
    user_id: String,
    username: String,
    created_at: chrono::DateTime<Utc>,
    expires_at: chrono::DateTime<Utc>,
    ip_address: String,
    user_agent: String,
    active: bool,
}

#[derive(Debug, Serialize, Deserialize)]
struct SecurityScanResult {
    timestamp: chrono::DateTime<Utc>,
    scan_type: String,
    path: String,
    issues: Vec<SecurityIssue>,
    summary: ScanSummary,
}

#[derive(Debug, Serialize, Deserialize)]
struct SecurityIssue {
    severity: String,
    category: String,
    description: String,
    file: Option<String>,
    line: Option<u32>,
    recommendation: String,
    fixable: bool,
}

#[derive(Debug, Serialize, Deserialize)]
struct ScanSummary {
    total_issues: usize,
    critical: usize,
    high: usize,
    medium: usize,
    low: usize,
    fixed: usize,
}

pub async fn run(cmd: SecurityCommand) -> Result<()> {
    match cmd {
        SecurityCommand::Login { username, password, remember, totp, force } => {
            login_user(username, password, remember, totp, force).await
        }
        SecurityCommand::Logout { all, session } => {
            logout_user(all, session).await
        }
        SecurityCommand::Status { verbose, session } => {
            check_auth_status(verbose, session).await
        }
        SecurityCommand::Scan { path, scan_type, format, fix, exclude } => {
            security_scan(path, scan_type, format, fix, exclude).await
        }
        SecurityCommand::Encrypt { data, algorithm, key_file, output, password } => {
            encrypt_data(data, algorithm, key_file, output, password).await
        }
        SecurityCommand::Decrypt { data, algorithm, key_file, output, password } => {
            decrypt_data(data, algorithm, key_file, output, password).await
        }
        SecurityCommand::Hash { data, algorithm, salt, iterations, format } => {
            generate_hash(data, algorithm, salt, iterations, format).await
        }
        SecurityCommand::Audit { scope, format, report, recommendations, compliance } => {
            security_audit(scope, format, report, recommendations, compliance).await
        }
    }
}

async fn login_user(
    username: String,
    password: Option<String>,
    remember: bool,
    totp: Option<String>,
    force: bool,
) -> Result<()> {
    info!("🔐 Authenticating user: {}", username);
    
    // Get password if not provided
    let password = if let Some(pwd) = password {
        pwd
    } else {
        rpassword::prompt_password("Password: ")?
    };
    
    // Validate credentials
    if !validate_credentials(&username, &password).await? {
        return Err(anyhow::anyhow!("Invalid credentials"));
    }
    
    // Validate TOTP if provided
    if let Some(totp_code) = totp {
        if !validate_totp(&username, &totp_code).await? {
            return Err(anyhow::anyhow!("Invalid TOTP code"));
        }
    }
    
    // Create session
    let session = create_session(&username, remember).await?;
    
    // Save session
    save_session(&session).await?;
    
    info!("✅ User authenticated successfully");
    println!("🔐 Authentication successful for user: {}", username);
    println!("🆔 Session ID: {}", session.id);
    println!("⏰ Expires: {}", session.expires_at.format("%Y-%m-%d %H:%M:%S"));
    
    if remember {
        println!("💾 Remembered login enabled");
    }
    
    Ok(())
}

async fn logout_user(all: bool, session: Option<String>) -> Result<()> {
    info!("🚪 Logging out user...");
    
    if all {
        // Logout from all sessions
        let sessions = load_sessions().await?;
        for session in sessions {
            if session.active {
                deactivate_session(&session.id).await?;
            }
        }
        println!("🚪 Logged out from all sessions");
    } else if let Some(session_id) = session {
        // Logout specific session
        deactivate_session(&session_id).await?;
        println!("🚪 Logged out from session: {}", session_id);
    } else {
        // Logout current session
        let current_session = get_current_session().await?;
        if let Some(session) = current_session {
            deactivate_session(&session.id).await?;
            println!("🚪 Logged out from current session");
        } else {
            println!("ℹ️  No active session found");
        }
    }
    
    Ok(())
}

async fn check_auth_status(verbose: bool, session: Option<String>) -> Result<()> {
    info!("📊 Checking authentication status...");
    
    let session = if let Some(session_id) = session {
        get_session(&session_id).await?
    } else {
        get_current_session().await?
    };
    
    if let Some(session) = session {
        if session.active && session.expires_at > Utc::now() {
            println!("✅ Authenticated as: {}", session.username);
            println!("🆔 Session ID: {}", session.id);
            println!("⏰ Expires: {}", session.expires_at.format("%Y-%m-%d %H:%M:%S"));
            
            if verbose {
                println!("📋 Session Details:");
                println!("   User ID: {}", session.user_id);
                println!("   Created: {}", session.created_at.format("%Y-%m-%d %H:%M:%S"));
                println!("   IP Address: {}", session.ip_address);
                println!("   User Agent: {}", session.user_agent);
            }
        } else {
            println!("❌ Session expired or inactive");
        }
    } else {
        println!("❌ Not authenticated");
    }
    
    Ok(())
}

async fn security_scan(
    path: PathBuf,
    scan_type: String,
    format: String,
    fix: bool,
    exclude: Vec<String>,
) -> Result<()> {
    info!("🔍 Starting security scan...");
    println!("🔍 Scanning: {:?}", path);
    println!("📋 Type: {}", scan_type);
    
    let mut issues = Vec::new();
    
    match scan_type.as_str() {
        "files" => {
            issues = scan_files(&path, &exclude).await?;
        }
        "network" => {
            issues = scan_network().await?;
        }
        "config" => {
            issues = scan_config(&path).await?;
        }
        _ => {
            return Err(anyhow::anyhow!("Unknown scan type: {}", scan_type));
        }
    }
    
    // Generate summary
    let summary = generate_scan_summary(&issues);
    
    // Fix issues if requested
    let fixed_count = if fix {
        fix_security_issues(&issues).await?
    } else {
        0
    };
    
    let result = SecurityScanResult {
        timestamp: Utc::now(),
        scan_type,
        path: path.to_string_lossy().to_string(),
        issues,
        summary: ScanSummary {
            fixed: fixed_count,
            ..summary
        },
    };
    
    // Output results
    match format.as_str() {
        "json" => {
            println!("{}", serde_json::to_string_pretty(&result)?);
        }
        "yaml" => {
            println!("{}", serde_yaml::to_string(&result)?);
        }
        "text" => {
            print_scan_results(&result);
        }
        _ => {
            return Err(anyhow::anyhow!("Unknown output format: {}", format));
        }
    }
    
    Ok(())
}

async fn encrypt_data(
    data: String,
    algorithm: String,
    key_file: Option<PathBuf>,
    output: Option<PathBuf>,
    password: bool,
) -> Result<()> {
    info!("🔒 Encrypting data...");
    
    let encrypted = if password {
        encrypt_with_password(&data, &algorithm).await?
    } else {
        encrypt_with_key(&data, &algorithm, key_file).await?
    };
    
    if let Some(output_path) = output {
        tokio::fs::write(&output_path, encrypted).await?;
        println!("✅ Data encrypted and saved to: {:?}", output_path);
    } else {
        println!("🔒 Encrypted data:");
        println!("{}", encrypted);
    }
    
    Ok(())
}

async fn decrypt_data(
    data: String,
    algorithm: String,
    key_file: Option<PathBuf>,
    output: Option<PathBuf>,
    password: bool,
) -> Result<()> {
    info!("🔓 Decrypting data...");
    
    let decrypted = if password {
        decrypt_with_password(&data, &algorithm).await?
    } else {
        decrypt_with_key(&data, &algorithm, key_file).await?
    };
    
    if let Some(output_path) = output {
        tokio::fs::write(&output_path, decrypted).await?;
        println!("✅ Data decrypted and saved to: {:?}", output_path);
    } else {
        println!("🔓 Decrypted data:");
        println!("{}", decrypted);
    }
    
    Ok(())
}

async fn generate_hash(
    data: String,
    algorithm: String,
    salt: Option<String>,
    iterations: u32,
    format: String,
) -> Result<()> {
    info!("🔐 Generating hash...");
    
    let hash = match algorithm.as_str() {
        "sha256" => {
            let mut hasher = Sha256::new();
            hasher.update(data.as_bytes());
            hasher.finalize().to_vec()
        }
        "sha512" => {
            let mut hasher = sha2::Sha512::new();
            hasher.update(data.as_bytes());
            hasher.finalize().to_vec()
        }
        "md5" => {
            let digest = md5::compute(data.as_bytes());
            digest.0.to_vec()
        }
        "argon2" => {
            let salt = salt.map(|s| SaltString::from_b64(&s).unwrap())
                .unwrap_or_else(|| SaltString::generate(&mut rand::thread_rng()));
            let argon2 = Argon2::default();
            let hash = argon2.hash_password(data.as_bytes(), &salt)
                .map_err(|e| anyhow::anyhow!("Argon2 error: {}", e))?;
            hash.hash.unwrap().as_bytes().to_vec()
        }
        _ => {
            return Err(anyhow::anyhow!("Unknown hash algorithm: {}", algorithm));
        }
    };
    
    let result = match format.as_str() {
        "hex" => hex::encode(&hash),
        "base64" => general_purpose::STANDARD.encode(&hash),
        "raw" => String::from_utf8_lossy(&hash).to_string(),
        _ => {
            return Err(anyhow::anyhow!("Unknown output format: {}", format));
        }
    };
    
    println!("🔐 Hash ({})", algorithm);
    println!("{}", result);
    
    Ok(())
}

async fn security_audit(
    scope: String,
    format: String,
    report: Option<PathBuf>,
    recommendations: bool,
    compliance: Option<String>,
) -> Result<()> {
    info!("🔍 Starting security audit...");
    println!("🔍 Audit scope: {}", scope);
    
    let mut audit_results = Vec::new();
    
    match scope.as_str() {
        "system" => {
            audit_results = audit_system().await?;
        }
        "user" => {
            audit_results = audit_user().await?;
        }
        "config" => {
            audit_results = audit_config().await?;
        }
        "all" => {
            audit_results = audit_all().await?;
        }
        _ => {
            return Err(anyhow::anyhow!("Unknown audit scope: {}", scope));
        }
    }
    
    // Add compliance check if requested
    if let Some(compliance_type) = compliance {
        let compliance_results = check_compliance(&compliance_type).await?;
        audit_results.extend(compliance_results);
    }
    
    // Add recommendations if requested
    if recommendations {
        let recs = generate_recommendations(&audit_results).await?;
        audit_results.extend(recs);
    }
    
    // Generate report
    let report_data = serde_json::to_string_pretty(&audit_results)?;
    
    if let Some(report_path) = report {
        tokio::fs::write(&report_path, report_data).await?;
        println!("📄 Audit report saved to: {:?}", report_path);
    } else {
        match format.as_str() {
            "json" => println!("{}", report_data),
            "yaml" => println!("{}", serde_yaml::to_string(&audit_results)?),
            "text" => print_audit_results(&audit_results),
            _ => return Err(anyhow::anyhow!("Unknown output format: {}", format)),
        }
    }
    
    Ok(())
}

// Helper functions
async fn validate_credentials(username: &str, password: &str) -> Result<bool> {
    // TODO: Implement actual credential validation
    // For now, accept any non-empty credentials
    Ok(!username.is_empty() && !password.is_empty())
}

async fn validate_totp(username: &str, code: &str) -> Result<bool> {
    // TODO: Implement TOTP validation
    // For now, accept any 6-digit code
    Ok(code.len() == 6 && code.chars().all(|c| c.is_ascii_digit()))
}

async fn create_session(username: &str, remember: bool) -> Result<Session> {
    let session_id = Uuid::new_v4().to_string();
    let expires_at = if remember {
        Utc::now() + Duration::days(30)
    } else {
        Utc::now() + Duration::hours(24)
    };
    
    Ok(Session {
        id: session_id,
        user_id: Uuid::new_v4().to_string(),
        username: username.to_string(),
        created_at: Utc::now(),
        expires_at,
        ip_address: "127.0.0.1".to_string(),
        user_agent: "tsk-cli".to_string(),
        active: true,
    })
}

async fn save_session(session: &Session) -> Result<()> {
    let sessions_dir = PathBuf::from("/tmp/tsk-sessions");
    tokio::fs::create_dir_all(&sessions_dir).await?;
    
    let session_file = sessions_dir.join(format!("{}.json", session.id));
    let json = serde_json::to_string_pretty(session)?;
    tokio::fs::write(session_file, json).await?;
    
    Ok(())
}

async fn load_sessions() -> Result<Vec<Session>> {
    let sessions_dir = PathBuf::from("/tmp/tsk-sessions");
    if !sessions_dir.exists() {
        return Ok(Vec::new());
    }
    
    let mut sessions = Vec::new();
    let mut entries = tokio::fs::read_dir(sessions_dir).await?;
    
    while let Some(entry) = entries.next_entry().await? {
        if entry.path().extension().map_or(false, |ext| ext == "json") {
            if let Ok(content) = tokio::fs::read_to_string(entry.path()).await {
                if let Ok(session) = serde_json::from_str::<Session>(&content) {
                    sessions.push(session);
                }
            }
        }
    }
    
    Ok(sessions)
}

async fn get_current_session() -> Result<Option<Session>> {
    let sessions = load_sessions().await?;
    Ok(sessions.into_iter().find(|s| s.active && s.expires_at > Utc::now()))
}

async fn get_session(session_id: &str) -> Result<Option<Session>> {
    let sessions = load_sessions().await?;
    Ok(sessions.into_iter().find(|s| s.id == session_id))
}

async fn deactivate_session(session_id: &str) -> Result<()> {
    let sessions_dir = PathBuf::from("/tmp/tsk-sessions");
    let session_file = sessions_dir.join(format!("{}.json", session_id));
    
    if session_file.exists() {
        tokio::fs::remove_file(session_file).await?;
    }
    
    Ok(())
}

async fn scan_files(path: &PathBuf, exclude: &[String]) -> Result<Vec<SecurityIssue>> {
    let mut issues = Vec::new();
    
    // TODO: Implement file security scanning
    // Check for sensitive files, permissions, etc.
    
    Ok(issues)
}

async fn scan_network() -> Result<Vec<SecurityIssue>> {
    let mut issues = Vec::new();
    
    // TODO: Implement network security scanning
    // Check open ports, services, etc.
    
    Ok(issues)
}

async fn scan_config(path: &PathBuf) -> Result<Vec<SecurityIssue>> {
    let mut issues = Vec::new();
    
    // TODO: Implement configuration security scanning
    // Check for hardcoded secrets, weak configurations, etc.
    
    Ok(issues)
}

fn generate_scan_summary(issues: &[SecurityIssue]) -> ScanSummary {
    let mut summary = ScanSummary {
        total_issues: issues.len(),
        critical: 0,
        high: 0,
        medium: 0,
        low: 0,
        fixed: 0,
    };
    
    for issue in issues {
        match issue.severity.as_str() {
            "critical" => summary.critical += 1,
            "high" => summary.high += 1,
            "medium" => summary.medium += 1,
            "low" => summary.low += 1,
            _ => {}
        }
    }
    
    summary
}

async fn fix_security_issues(issues: &[SecurityIssue]) -> Result<usize> {
    let mut fixed = 0;
    
    for issue in issues {
        if issue.fixable {
            // TODO: Implement automatic fixing
            fixed += 1;
        }
    }
    
    Ok(fixed)
}

fn print_scan_results(result: &SecurityScanResult) {
    println!("🔍 Security Scan Results");
    println!("📅 Timestamp: {}", result.timestamp.format("%Y-%m-%d %H:%M:%S"));
    println!("📋 Type: {}", result.scan_type);
    println!("📁 Path: {}", result.path);
    println!();
    
    println!("📊 Summary:");
    println!("   Total Issues: {}", result.summary.total_issues);
    println!("   Critical: {}", result.summary.critical);
    println!("   High: {}", result.summary.high);
    println!("   Medium: {}", result.summary.medium);
    println!("   Low: {}", result.summary.low);
    println!("   Fixed: {}", result.summary.fixed);
    println!();
    
    if !result.issues.is_empty() {
        println!("🚨 Issues Found:");
        for (i, issue) in result.issues.iter().enumerate() {
            println!("{}. [{}] {} - {}", i + 1, issue.severity.to_uppercase(), issue.category, issue.description);
            if let Some(file) = &issue.file {
                println!("   File: {}:{}", file, issue.line.unwrap_or(0));
            }
            println!("   Recommendation: {}", issue.recommendation);
            println!();
        }
    }
}

async fn encrypt_with_password(data: &str, algorithm: &str) -> Result<String> {
    // TODO: Implement password-based encryption
    Ok(format!("encrypted_{}_{}", algorithm, data))
}

async fn encrypt_with_key(data: &str, algorithm: &str, key_file: Option<PathBuf>) -> Result<String> {
    // TODO: Implement key-based encryption
    Ok(format!("encrypted_{}_{}", algorithm, data))
}

async fn decrypt_with_password(data: &str, algorithm: &str) -> Result<String> {
    // TODO: Implement password-based decryption
    Ok(data.replace("encrypted_", "").replace(&format!("{}_", algorithm), ""))
}

async fn decrypt_with_key(data: &str, algorithm: &str, key_file: Option<PathBuf>) -> Result<String> {
    // TODO: Implement key-based decryption
    Ok(data.replace("encrypted_", "").replace(&format!("{}_", algorithm), ""))
}

async fn audit_system() -> Result<Vec<SecurityIssue>> {
    let mut issues = Vec::new();
    // TODO: Implement system audit
    Ok(issues)
}

async fn audit_user() -> Result<Vec<SecurityIssue>> {
    let mut issues = Vec::new();
    // TODO: Implement user audit
    Ok(issues)
}

async fn audit_config() -> Result<Vec<SecurityIssue>> {
    let mut issues = Vec::new();
    // TODO: Implement configuration audit
    Ok(issues)
}

async fn audit_all() -> Result<Vec<SecurityIssue>> {
    let mut issues = Vec::new();
    issues.extend(audit_system().await?);
    issues.extend(audit_user().await?);
    issues.extend(audit_config().await?);
    Ok(issues)
}

async fn check_compliance(compliance_type: &str) -> Result<Vec<SecurityIssue>> {
    let mut issues = Vec::new();
    // TODO: Implement compliance checking
    Ok(issues)
}

async fn generate_recommendations(issues: &[SecurityIssue]) -> Result<Vec<SecurityIssue>> {
    let mut recommendations = Vec::new();
    // TODO: Generate recommendations based on issues
    Ok(recommendations)
}

fn print_audit_results(results: &[SecurityIssue]) {
    println!("🔍 Security Audit Results");
    println!();
    
    for (i, issue) in results.iter().enumerate() {
        println!("{}. [{}] {} - {}", i + 1, issue.severity.to_uppercase(), issue.category, issue.description);
        println!("   Recommendation: {}", issue.recommendation);
        println!();
    }
}