// lintcn list — list installed rules with metadata from .lintcn/

import { findLintcnDir } from '../paths.ts'
import { discoverRules } from '../discover.ts'

export function listRules(): void {
  const lintcnDir = findLintcnDir()

  if (!lintcnDir) {
    console.log('No .lintcn/ directory found. Run `lintcn add <url>` to add rules.')
    return
  }

  const rules = discoverRules(lintcnDir)

  if (rules.length === 0) {
    console.log('No rules installed. Run `lintcn add <url>` to add rules.')
    return
  }

  console.log('Installed rules:\n')

  const maxNameLen = Math.max(...rules.map((r) => {
    return r.name.length + (r.severity === 'warn' ? 7 : 0) // ' (warn)' = 7 chars
  }))

  for (const rule of rules) {
    const suffix = rule.severity === 'warn' ? ' (warn)' : ''
    const name = (rule.name + suffix).padEnd(maxNameLen + 2)
    const desc = rule.description || '(no description)'
    console.log(`  ${name}${desc}`)
  }

  console.log(`\n${rules.length} rule${rules.length === 1 ? '' : 's'} installed`)
}