/**
 * Scan command - Run security scans
 */

import { Command } from 'commander'
import * as path from 'path'

interface ScanOptions {
  tools?: string
  output?: string
  format?: string
  severity?: string
}

export const scanCommand = new Command('scan')
  .description('Run security scans on your codebase')
  .argument('[path]', 'Path to scan', '.')
  .option('-t, --tools <tools>', 'Comma-separated list of tools (gitleaks,semgrep,bandit,trivy,grype,syft)', 'all')
  .option('-o, --output <path>', 'Output file path')
  .option('-f, --format <format>', 'Output format (json, sarif, table)', 'table')
  .option('-s, --severity <level>', 'Minimum severity to report (low, medium, high, critical)', 'low')
  .action(async (scanPath: string, options: ScanOptions) => {
    const chalk = (await import('chalk')).default
    const ora = (await import('ora')).default

    console.log(chalk.bold.blue('\n🔒 BreakPilot Security Scanner\n'))

    const targetPath = path.resolve(scanPath)
    console.log(chalk.gray(`Scanning: ${targetPath}\n`))

    const tools = options.tools === 'all'
      ? ['gitleaks', 'semgrep', 'bandit', 'trivy', 'grype', 'syft']
      : options.tools!.split(',').map(t => t.trim())

    const results: ScanResult[] = []

    for (const tool of tools) {
      const spinner = ora(`Running ${tool}...`).start()

      try {
        // Simulate running the tool
        await sleep(1500)

        const toolResult = simulateToolResult(tool)
        results.push(toolResult)

        if (toolResult.findings.length > 0) {
          spinner.warn(`${tool}: ${toolResult.findings.length} findings`)
        } else {
          spinner.succeed(`${tool}: No issues found`)
        }
      } catch (error) {
        spinner.fail(`${tool}: Failed`)
      }
    }

    // Summary
    console.log(chalk.bold('\n📊 Scan Summary\n'))

    const allFindings = results.flatMap(r => r.findings)
    const bySeverity = {
      critical: allFindings.filter(f => f.severity === 'CRITICAL'),
      high: allFindings.filter(f => f.severity === 'HIGH'),
      medium: allFindings.filter(f => f.severity === 'MEDIUM'),
      low: allFindings.filter(f => f.severity === 'LOW'),
    }

    if (bySeverity.critical.length > 0) {
      console.log(chalk.red(`  🔴 Critical: ${bySeverity.critical.length}`))
    }
    if (bySeverity.high.length > 0) {
      console.log(chalk.red(`  🟠 High: ${bySeverity.high.length}`))
    }
    if (bySeverity.medium.length > 0) {
      console.log(chalk.yellow(`  🟡 Medium: ${bySeverity.medium.length}`))
    }
    if (bySeverity.low.length > 0) {
      console.log(chalk.gray(`  🟢 Low: ${bySeverity.low.length}`))
    }

    if (allFindings.length === 0) {
      console.log(chalk.green('  ✅ No security issues found!'))
    } else {
      console.log(chalk.gray(`\n  Total: ${allFindings.length} findings`))

      // Show top findings
      if (options.format === 'table') {
        console.log(chalk.bold('\n📋 Top Findings\n'))

        const topFindings = allFindings
          .sort((a, b) => severityOrder(b.severity) - severityOrder(a.severity))
          .slice(0, 10)

        for (const finding of topFindings) {
          const severityColor = getSeverityColor(finding.severity)
          console.log(
            `  ${severityColor(finding.severity.padEnd(8))} ` +
            `${chalk.gray(finding.tool.padEnd(10))} ` +
            `${finding.title}`
          )
          if (finding.file) {
            console.log(chalk.gray(`           └─ ${finding.file}:${finding.line || '?'}`))
          }
        }

        if (allFindings.length > 10) {
          console.log(chalk.gray(`\n  ... and ${allFindings.length - 10} more findings`))
        }
      }
    }

    // Write output if requested
    if (options.output) {
      const fs = await import('fs')
      const output = {
        scanDate: new Date().toISOString(),
        targetPath,
        tools,
        summary: {
          total: allFindings.length,
          critical: bySeverity.critical.length,
          high: bySeverity.high.length,
          medium: bySeverity.medium.length,
          low: bySeverity.low.length,
        },
        findings: allFindings,
      }

      fs.writeFileSync(options.output, JSON.stringify(output, null, 2))
      console.log(chalk.gray(`\nResults written to: ${options.output}`))
    }

    // Exit with error if critical findings
    if (bySeverity.critical.length > 0 || bySeverity.high.length > 0) {
      process.exit(1)
    }
  })

interface Finding {
  id: string
  tool: string
  severity: 'CRITICAL' | 'HIGH' | 'MEDIUM' | 'LOW'
  title: string
  description?: string
  file?: string
  line?: number
  recommendation?: string
}

interface ScanResult {
  tool: string
  findings: Finding[]
}

function simulateToolResult(tool: string): ScanResult {
  // Simulate some findings for demonstration
  const findings: Finding[] = []

  switch (tool) {
    case 'gitleaks':
      // Secrets detection - usually finds nothing in clean repos
      break
    case 'semgrep':
      findings.push({
        id: 'semgrep-1',
        tool: 'semgrep',
        severity: 'MEDIUM',
        title: 'Potential SQL injection',
        description: 'User input used in SQL query without parameterization',
        file: 'src/db/queries.ts',
        line: 42,
        recommendation: 'Use parameterized queries instead of string concatenation',
      })
      break
    case 'bandit':
      // Python security - skip if not a Python project
      break
    case 'trivy':
      findings.push({
        id: 'trivy-1',
        tool: 'trivy',
        severity: 'HIGH',
        title: 'CVE-2024-1234 in lodash@4.17.20',
        description: 'Prototype pollution vulnerability',
        recommendation: 'Upgrade to lodash@4.17.21 or higher',
      })
      break
    case 'grype':
      findings.push({
        id: 'grype-1',
        tool: 'grype',
        severity: 'LOW',
        title: 'Outdated dependency: axios@0.21.0',
        recommendation: 'Update to latest version',
      })
      break
    case 'syft':
      // SBOM generation - no findings, just metadata
      break
  }

  return { tool, findings }
}

function severityOrder(severity: string): number {
  switch (severity) {
    case 'CRITICAL': return 4
    case 'HIGH': return 3
    case 'MEDIUM': return 2
    case 'LOW': return 1
    default: return 0
  }
}

function getSeverityColor(severity: string): (text: string) => string {
  const chalk = require('chalk')
  switch (severity) {
    case 'CRITICAL': return chalk.red.bold
    case 'HIGH': return chalk.red
    case 'MEDIUM': return chalk.yellow
    case 'LOW': return chalk.gray
    default: return chalk.white
  }
}

function sleep(ms: number): Promise<void> {
  return new Promise(resolve => setTimeout(resolve, ms))
}