forge-guard 0.1.0

//! `forge audit` — the primary audit command.

use crate::ai::{
    consensus_to_core_finding, create_provider, AuditContext, ConsensusConfig, ConsensusEngine,
    GasAuditor, LlmProvider, LogicAuditor, SecurityAuditor,
};
use crate::chains::ChainRegistry;
use crate::core::{
    AuditResult, AuditSummary, OutputFormat, ProjectConfig, RiskLevel, SecurityScores,
};
use crate::exploit;
use crate::gas;
use crate::plugins::PluginRegistry;
use crate::reports;
use crate::security::SecurityEngine;
use crate::utils::Cache;

use super::AuditArgs;
use anyhow::Result;
use std::time::Instant;

/// Run a comprehensive security audit.
pub fn run(args: &AuditArgs) -> Result<()> {
    let start = Instant::now();

    // Load configuration
    let mut config = ProjectConfig::from_default_location();
    apply_args(&mut config, args);

    // Initialize systems
    let cache = Cache::new(&config)?;
    let chain_registry = ChainRegistry::default();
    let plugin_registry = PluginRegistry::new(&config)?;
    let security_engine = SecurityEngine::new(&config, &plugin_registry)?;

    // Discover Solidity source files
    let source_files = discover_sources(&config)?;
    if source_files.is_empty() {
        anyhow::bail!("No Solidity source files found in {:?}", config.src_dirs);
    }

    // Incremental file analysis: skip unchanged files using content hashing
    let changed_files = cache.filter_changed_files(&source_files);
    let skipped_count = source_files.len() - changed_files.len();
    let files_to_analyze = if changed_files.is_empty() && !source_files.is_empty() {
        // All files unchanged — still analyze them but log it
        source_files.clone()
    } else {
        changed_files
    };

    if skipped_count > 0 && !files_to_analyze.is_empty() {
        eprintln!(
            "⏭️  Skipping {} unchanged files (content hash matched)",
            skipped_count
        );
    }

    // Phase 1: Security analysis
    if args.quick {
        eprintln!(
            "⚡ Running quick audit on {} files (chain: {})...",
            files_to_analyze.len(),
            args.shared.chain
        );
    } else {
        eprintln!(
            "🔍 Running security audit on {} files (chain: {})...",
            files_to_analyze.len(),
            args.shared.chain
        );
    }

    let findings = if args.quick {
        security_engine.analyze_files_quick(&files_to_analyze, &chain_registry)?
    } else {
        security_engine.analyze_files(&files_to_analyze, &chain_registry)?
    };

    // Record file hashes for future incremental analysis
    if !args.quick {
        for file in &files_to_analyze {
            let _ = cache.record_file_hash(file);
        }
    }

    // Phase 2: Exploit analysis (optional — skipped in quick mode)
    let exploit_findings = if !args.quick && (args.exploit || args.full) {
        eprintln!("💥 Running exploit path analysis...");
        exploit::analyze_exploit_paths(&findings, &files_to_analyze)?
    } else {
        Vec::new()
    };

    // Phase 3: Gas analysis (optional — skipped in quick mode)
    let gas_findings = if !args.quick && (args.gas || args.full) {
        eprintln!("⛽ Running gas analysis...");
        gas::analyze_gas(&files_to_analyze, &config)?
    } else {
        Vec::new()
    };

    // Phase 4: AI-powered analysis (optional — skipped in quick mode)
    let ai_findings = if !args.quick && args.ai {
        run_ai_analysis(&files_to_analyze, args, &config)?
    } else {
        Vec::new()
    };

    // Combine all findings
    let mut all_findings = findings;
    all_findings.extend(exploit_findings);
    all_findings.extend(gas_findings);
    all_findings.extend(ai_findings);

    // Calculate scores
    let scores = security_engine.calculate_scores(&all_findings);
    let overall_score = calculate_overall(&scores);
    let risk_level = determine_risk_level(overall_score, &all_findings);
    let production_ready = overall_score >= config.min_deployment_score;
    let deployment_approved = !has_blocking_findings(&all_findings) && production_ready;

    let duration = start.elapsed().as_secs_f64();

    let result = AuditResult {
        project_name: config.project_root.to_string_lossy().to_string(),
        chain: args.shared.chain.clone(),
        timestamp: chrono::Utc::now().to_rfc3339(),
        duration_seconds: duration,
        findings: all_findings.clone(),
        scores,
        overall_score,
        risk_level,
        production_ready,
        deployment_approved,
        summary: build_summary(&all_findings, &source_files),
    };

    // Output
    match config.output {
        OutputFormat::Json => {
            println!("{}", serde_json::to_string_pretty(&result)?);
        }
        OutputFormat::Markdown => {
            let md = reports::markdown::generate_report(&result)?;
            println!("{}", md);
        }
        OutputFormat::Terminal => {
            if args.quick || args.summary {
                // Show executive summary in quick mode or when --summary is set
                let summary = reports::generate_executive_summary(&result);
                println!("{}", summary);
            } else {
                print_terminal_report(&result, args);
            }
        }
    }

    // Write report files if requested
    if args.shared.report {
        let report_dir = std::path::PathBuf::from("reports");
        std::fs::create_dir_all(&report_dir)?;
        reports::json::write_report(&result, &report_dir.join("audit.json"))?;
        let md = reports::markdown::generate_report(&result)?;
        std::fs::write(report_dir.join("audit.md"), md)?;
        eprintln!("📄 Reports saved to reports/");
    }

    // Cache results
    cache.store("last_audit", &result)?;

    if args.shared.strict && all_findings.iter().any(|f| f.severity.score() >= 3) {
        anyhow::bail!("Strict mode: findings detected with severity MEDIUM or higher");
    }

    Ok(())
}

fn apply_args(config: &mut ProjectConfig, args: &AuditArgs) {
    config.chain = args.shared.chain.clone();
    config.project_root = args.shared.project.clone();
    config.strict = args.shared.strict;
    config.offline = args.shared.offline;
    config.production = args.shared.production;
    config.parallelism = args.shared.parallelism;
    config.output = if args.shared.json {
        OutputFormat::Json
    } else if args.shared.markdown {
        OutputFormat::Markdown
    } else {
        OutputFormat::Terminal
    };

    if let Some(exclude) = &args.exclude {
        config.exclude = exclude.split(',').map(String::from).collect();
    }
}

fn discover_sources(config: &ProjectConfig) -> Result<Vec<std::path::PathBuf>> {
    let mut files = Vec::new();
    for dir in &config.src_dirs {
        let dir_path = if dir.is_absolute() {
            dir.clone()
        } else {
            config.project_root.join(dir)
        };
        if !dir_path.exists() {
            continue;
        }
        for entry in walkdir::WalkDir::new(&dir_path)
            .into_iter()
            .filter_entry(|e| {
                !config
                    .exclude
                    .iter()
                    .any(|p| e.file_name().to_string_lossy().contains(p))
            })
            .filter_map(|e| e.ok())
        {
            let path = entry.path();
            if path.extension().is_some_and(|ext| ext == "sol") {
                files.push(path.to_path_buf());
            }
        }
    }
    Ok(files)
}

fn calculate_overall(scores: &SecurityScores) -> u8 {
    let vals = [
        scores.access_control,
        scores.security,
        scores.fuzzing,
        scores.gas,
        scores.architecture,
        scores.upgradeability,
        scores.dependencies,
        scores.deployment,
        scores.proxy_safety,
        scores.chain_compatibility,
        scores.production_readiness,
        scores.exploit_resistance,
    ];
    (vals.iter().copied().map(u16::from).sum::<u16>() / vals.len() as u16) as u8
}

fn determine_risk_level(score: u8, findings: &[crate::core::Finding]) -> RiskLevel {
    let has_critical = findings
        .iter()
        .any(|f| f.severity == crate::core::Severity::Critical);
    let has_high = findings
        .iter()
        .any(|f| f.severity == crate::core::Severity::High);

    if has_critical || score < 30 {
        RiskLevel::Critical
    } else if has_high || score < 50 {
        RiskLevel::High
    } else if score < 70 {
        RiskLevel::Medium
    } else if score < 85 {
        RiskLevel::Low
    } else {
        RiskLevel::Minimal
    }
}

fn has_blocking_findings(findings: &[crate::core::Finding]) -> bool {
    findings.iter().any(|f| f.blocks_deployment)
}

fn build_summary(
    findings: &[crate::core::Finding],
    sources: &[std::path::PathBuf],
) -> AuditSummary {
    let mut summary = AuditSummary {
        total_findings: findings.len(),
        critical_count: 0,
        high_count: 0,
        medium_count: 0,
        low_count: 0,
        info_count: 0,
        files_analyzed: sources.len(),
        lines_analyzed: 0,
        contracts_analyzed: sources.len(),
    };

    for f in findings {
        match f.severity {
            crate::core::Severity::Critical => summary.critical_count += 1,
            crate::core::Severity::High => summary.high_count += 1,
            crate::core::Severity::Medium => summary.medium_count += 1,
            crate::core::Severity::Low => summary.low_count += 1,
            crate::core::Severity::Informational => summary.info_count += 1,
        }
    }

    // Estimate lines analyzed
    for src in sources {
        if let Ok(content) = std::fs::read_to_string(src) {
            summary.lines_analyzed += content.lines().count();
        }
    }

    summary
}

fn print_terminal_report(result: &AuditResult, _args: &AuditArgs) {
    use colored::*;

    println!(
        "\n{}",
        "═══════════════════════════════════════════════".bright_blue()
    );
    println!(
        "{}",
        "           FORGE AUDIT — SECURITY REPORT       "
            .bright_blue()
            .bold()
    );
    println!(
        "{}",
        "═══════════════════════════════════════════════".bright_blue()
    );

    println!("\n📋 Project:  {}", result.project_name);
    println!("⛓️  Chain:    {}", result.chain);
    println!("🕐 Duration:  {:.2}s", result.duration_seconds);
    println!("📁 Files:     {}", result.summary.files_analyzed);

    println!("\n{}", "── Findings ──".bold());
    println!(
        "  🛑 Critical:  {}",
        result.summary.critical_count.to_string().red().bold()
    );
    println!(
        "  🔴 High:     {}",
        result.summary.high_count.to_string().red()
    );
    println!(
        "  🟡 Medium:   {}",
        result.summary.medium_count.to_string().yellow()
    );
    println!(
        "  🔵 Low:      {}",
        result.summary.low_count.to_string().blue()
    );
    println!(
        "  ⚪ Info:     {}",
        result.summary.info_count.to_string().dimmed()
    );

    println!("\n{}", "── Scores ──".bold());
    println!(
        "  🔐 Access Control:      {:>3}/100",
        result.scores.access_control
    );
    println!(
        "  🛡️  Security:           {:>3}/100",
        result.scores.security
    );
    println!("  🎯 Fuzzing:             {:>3}/100", result.scores.fuzzing);
    println!("  ⛽ Gas:                 {:>3}/100", result.scores.gas);
    println!(
        "  🏗️  Architecture:       {:>3}/100",
        result.scores.architecture
    );
    println!(
        "  ⬆️  Upgradeability:     {:>3}/100",
        result.scores.upgradeability
    );
    println!(
        "  📦 Dependencies:        {:>3}/100",
        result.scores.dependencies
    );
    println!(
        "  🚀 Deployment:          {:>3}/100",
        result.scores.deployment
    );
    println!(
        "  🔗 Proxy Safety:        {:>3}/100",
        result.scores.proxy_safety
    );
    println!(
        "  ⛓️  Chain Compat:       {:>3}/100",
        result.scores.chain_compatibility
    );
    println!(
        "  ✅ Production Ready:    {:>3}/100",
        result.scores.production_readiness
    );
    println!(
        "  💥 Exploit Resistance:  {:>3}/100",
        result.scores.exploit_resistance
    );

    let overall_color = if result.overall_score >= 85 {
        "green"
    } else if result.overall_score >= 70 {
        "yellow"
    } else {
        "red"
    };
    println!(
        "\n{} {}",
        "Overall Score:".bold(),
        result.overall_score.to_string().color(overall_color).bold()
    );
    println!(
        "{} {}",
        "Risk Level:".bold(),
        format!("{}", result.risk_level)
            .color(match result.risk_level {
                RiskLevel::Critical => "red",
                RiskLevel::High => "red",
                RiskLevel::Medium => "yellow",
                RiskLevel::Low => "green",
                RiskLevel::Minimal => "green",
            })
            .bold()
    );
    println!(
        "{} {}",
        "Production Ready:".bold(),
        if result.production_ready {
            "✅ YES".green().bold()
        } else {
            "❌ NO".red().bold()
        }
    );
    println!(
        "{} {}",
        "Deployment:".bold(),
        if result.deployment_approved {
            "✅ APPROVED".green().bold()
        } else {
            "❌ BLOCKED".red().bold()
        }
    );

    // Show top findings
    let critical_high: Vec<_> = result
        .findings
        .iter()
        .filter(|f| {
            f.severity == crate::core::Severity::Critical
                || f.severity == crate::core::Severity::High
        })
        .collect();
    if !critical_high.is_empty() {
        println!("\n{}", "── Top Findings ──".bold().red());
        for f in critical_high.iter().take(5) {
            println!(
                "\n  [{}] {}",
                f.severity.to_string().red().bold(),
                f.title.bold()
            );
            println!(
                "       📄 {}:{}",
                f.file.as_deref().unwrap_or("?"),
                f.line.map_or("?".into(), |l| l.to_string())
            );
            println!("       💡 {}", f.recommendation);
        }
        if critical_high.len() > 5 {
            println!(
                "\n  ... and {} more critical/high findings",
                critical_high.len() - 5
            );
        }
    }

    println!(
        "\n{}",
        "═══════════════════════════════════════════════".bright_blue()
    );
}

/// Run AI-powered analysis on all source files.
fn run_ai_analysis(
    files: &[std::path::PathBuf],
    args: &AuditArgs,
    config: &ProjectConfig,
) -> Result<Vec<crate::core::Finding>> {
    use std::sync::Arc;

    eprintln!(
        "🤖 Running AI analysis (provider: {}, model: {})...",
        args.ai_provider, args.ai_model
    );

    // Create the LLM provider
    let boxed: Box<dyn LlmProvider> = create_provider(
        &args.ai_provider,
        &args.ai_model,
        config.ai.temperature,
        config.ai.max_tokens,
        args.ai_api_key.clone(),
        args.ollama_endpoint.clone(),
    )?;
    let provider: Arc<dyn LlmProvider> = Arc::from(boxed);

    // Build consensus engine with auditors
    let mut engine = ConsensusEngine::new(ConsensusConfig {
        min_confidence: config.ai.min_confidence,
        ..Default::default()
    });

    // Always add the security auditor
    engine.register(Box::new(SecurityAuditor::new(Arc::clone(&provider))));

    // Optionally add gas and logic auditors
    if args.ai_full || args.full {
        engine.register(Box::new(GasAuditor::new(Arc::clone(&provider))));
        engine.register(Box::new(LogicAuditor::new(Arc::clone(&provider))));
    }

    // Process each file
    let mut all_ai_findings = Vec::new();
    for file_path in files {
        let source_code = match std::fs::read_to_string(file_path) {
            Ok(c) => c,
            Err(e) => {
                eprintln!("  ⚠️  Could not read {}: {e}", file_path.display());
                continue;
            }
        };

        let file_name = file_path.to_string_lossy();
        let ctx = AuditContext::new(&source_code, &file_name, &config.chain);

        let report = engine.analyze(&ctx);

        if report.auditor_count > 0 {
            eprintln!(
                "  🤖 {}: {} findings ({} consensus, {} filtered)",
                file_name,
                report.findings.len(),
                report.deduplicated_count,
                report.filtered_count
            );
        }

        // Convert consensus findings to core Findings
        for cf in &report.findings {
            all_ai_findings.push(consensus_to_core_finding(cf, &file_name));
        }
    }

    eprintln!(
        "🤖 AI analysis complete — {} findings reported",
        all_ai_findings.len()
    );

    Ok(all_ai_findings)
}