import { readFileSync, writeFileSync, readdirSync } from 'node:fs'
import { join } from 'node:path'

const SRC_DIR = 'D:\\Code\\verify\\frontend\\src'

function getAllFiles(dir, exts) {
  const results = []
  const entries = readdirSync(dir, { withFileTypes: true })
  for (const entry of entries) {
    const fullPath = join(dir, entry.name)
    if (entry.isDirectory()) {
      results.push(...getAllFiles(fullPath, exts))
    } else if (exts.some(ext => entry.name.endsWith(ext))) {
      results.push(fullPath)
    }
  }
  return results
}

function lucideToPascal(kebab) {
  return kebab
    .split('-')
    .map(part => part.charAt(0).toUpperCase() + part.slice(1))
    .join('')
}

function processFile(filePath) {
  let content = readFileSync(filePath, 'utf-8')
  const originalContent = content

  if (!content.includes('@iconify/vue') && !content.includes('icon="lucide:') && !content.includes("icon='lucide:") && !content.includes('h(Icon')) {
    return null
  }

  const usedIcons = new Set()

  // Step 1: Replace <Icon icon="lucide:xxx" ... /> (single line)
  content = content.replace(/<Icon\s+icon="lucide:([a-z0-9-]+)"([^>]*)\/>/g, (match, iconName, restAttrs) => {
    const pascalName = lucideToPascal(iconName)
    usedIcons.add(pascalName)
    const trimmedAttrs = restAttrs.trim()
    if (trimmedAttrs) {
      return `<${pascalName} ${trimmedAttrs} />`
    }
    return `<${pascalName} />`
  })

  // Step 2: Replace multiline <Icon\n  icon="lucide:xxx"\n  .../>
  content = content.replace(/<Icon\s+([^>]*?)icon="lucide:([a-z0-9-]+)"([^>]*?)\/>/gs, (match, before, iconName, after) => {
    const pascalName = lucideToPascal(iconName)
    usedIcons.add(pascalName)
    const newAttrs = (before + after).replace(/\s+/g, ' ').trim()
    if (newAttrs) {
      return `<${pascalName} ${newAttrs} />`
    }
    return `<${pascalName} />`
  })

  // Step 3: Replace h(Icon, { icon: 'lucide:xxx', ... }) in columns.ts files
  content = content.replace(/h\(\s*Icon\s*,\s*\{\s*icon:\s*['"]lucide:([a-z0-9-]+)['"]\s*,?\s*([^}]*)\}\s*\)/g, (match, iconName, restProps) => {
    const pascalName = lucideToPascal(iconName)
    usedIcons.add(pascalName)
    const trimmedProps = restProps.trim().replace(/,\s*$/, '')
    if (trimmedProps) {
      return `h(${pascalName}, { ${trimmedProps} })`
    }
    return `h(${pascalName})`
  })

  // Step 4: Replace import { Icon } from '@iconify/vue'
  content = content.replace(/import\s*\{\s*Icon\s*\}\s*from\s*['"]@iconify\/vue['"]\s*\n?/g, '')

  // Step 5: Add lucide-vue-next import if we used any icons
  if (usedIcons.size > 0 && !content.includes("from 'lucide-vue-next'") && !content.includes('from "lucide-vue-next"')) {
    const sortedIcons = [...usedIcons].sort()
    const importLine = `import { ${sortedIcons.join(', ')} } from 'lucide-vue-next'\n`
    
    const firstImportMatch = content.match(/^import\s/m)
    if (firstImportMatch) {
      const insertPos = content.indexOf(firstImportMatch[0])
      content = content.slice(0, insertPos) + importLine + content.slice(insertPos)
    } else {
      content = content.replace(/(<script[^>]*>)/, `$1\n${importLine}`)
    }
  } else if (usedIcons.size > 0) {
    const existingImportMatch = content.match(/import\s*\{([^}]*)\}\s*from\s*['"]lucide-vue-next['"]/s)
    if (existingImportMatch) {
      const existingIcons = existingImportMatch[1]
        .split(',')
        .map(s => s.trim())
        .filter(Boolean)
      
      const newIcons = [...usedIcons].filter(icon => !existingIcons.includes(icon))
      
      if (newIcons.length > 0) {
        const allIcons = [...existingIcons, ...newIcons].sort()
        const newImport = `import { ${allIcons.join(', ')} } from 'lucide-vue-next'`
        content = content.replace(existingImportMatch[0], newImport)
      }
    }
  }

  if (content !== originalContent) {
    writeFileSync(filePath, content, 'utf-8')
    return { file: filePath, icons: [...usedIcons] }
  }
  return null
}

const files = getAllFiles(SRC_DIR, ['.vue', '.ts'])
const results = []

for (const file of files) {
  const result = processFile(file)
  if (result) {
    results.push(result)
  }
}

console.log(`\nProcessed ${results.length} files:`)
for (const r of results) {
  console.log(`  ${r.file}: ${r.icons.join(', ')}`)
}