const fs = require('fs')
const path = require('path')

const toggleComment = ({ filepath, regex }) => {
  let updatedContent = fs.readFileSync(filepath, 'utf8')
  const match = updatedContent.match(regex)

  if (match) {
    const matchedContent = match[0]
    const hasComment = matchedContent.startsWith('# ')
    if (hasComment) {
      const hasBreakline = matchedContent.includes('\n')
      if (hasBreakline) {
        updatedContent = updatedContent.replace(regex, matchedContent.replace(/# /gm, ''))
        fs.writeFileSync(filepath, updatedContent, 'utf8')
      }
    } else {
      updatedContent = updatedContent.replace(regex, '# ' + matchedContent)
      fs.writeFileSync(filepath, updatedContent, 'utf8')
    }
  }
}

const createNewfolder = (rootfolder, folderName) => {
  const newFolder = path.join(rootfolder, folderName)
  fs.mkdirSync(newFolder, { recursive: true })
  return newFolder
}

const deleteFolder = (folderPath) => {
  if (fs.existsSync(folderPath)) {
    fs.rmSync(folderPath, { recursive: true, force: true })
  }
}

const getFolderName = (rootfolder) => {
  const configPath = path.join(rootfolder, 'exampleSite/hugo.toml')
  const getConfig = fs.readFileSync(configPath, 'utf8')
  const match = getConfig.match(/theme\s*=\s*\[?"([^"\]]+)"\]?/)
  let selectedTheme = null
  if (match && match[1]) {
    selectedTheme = match[1]
  }
  return selectedTheme
}

const iterateFilesAndFolders = (rootFolder, { destinationRoot }) => {
  const directory = path.join(rootFolder)
  const items = fs.readdirSync(directory, { withFileTypes: true })
  items.forEach((item) => {
    if (item.isDirectory()) {
      createNewfolder(destinationRoot, item.name)
      iterateFilesAndFolders(path.join(directory, item.name), {
        currentFolder: item.name,
        destinationRoot: path.join(destinationRoot, item.name),
      })
    } else {
      const sourceFile = path.join(directory, item.name)
      const destinationFile = path.join(destinationRoot, item.name)
      fs.renameSync(sourceFile, destinationFile)
    }
  })
}

const setupTheme = () => {
  const rootFolder = path.join(__dirname, '../')

  if (!fs.existsSync(path.join(rootFolder, 'exampleSite'))) {
    // remove this part if you don't using theme demo as a module
    ;[
      {
        filepath: path.join(rootFolder, 'config/_default/module.toml'),
        regex: /# \[\[imports\]\]\s*\r?\n# path = "([^"]+)"/,
      },
      {
        filepath: path.join(rootFolder, 'hugo.toml'),
        regex: /^.*theme\s*=\s*("[^"\]]+"|\S+)/m,
      },
    ].forEach(toggleComment)

    const includesFiles = [
      'tailwind.config.js',
      'postcss.config.js',
      'go.mod',
      'hugo.toml',
      'assets',
      'config',
      'data',
      'content',
      'i18n',
      'static',
    ]

    const folder = createNewfolder(rootFolder, 'exampleSite')

    fs.readdirSync(rootFolder, { withFileTypes: true }).forEach((file) => {
      if (includesFiles.includes(file.name)) {
        if (file.isDirectory()) {
          const destination = path.join(rootFolder, 'exampleSite', file.name)
          fs.mkdirSync(destination, { recursive: true })
          iterateFilesAndFolders(path.join(rootFolder, file.name), {
            destinationRoot: destination,
          })
          deleteFolder(path.join(rootFolder, file.name))
        } else {
          fs.renameSync(path.join(rootFolder, file.name), path.join(folder, file.name))
        }
      }
    })

    const themes = path.join(rootFolder, 'themes')
    iterateFilesAndFolders(path.join(themes, getFolderName(rootFolder)), {
      destinationRoot: rootFolder,
    })
    deleteFolder(themes)
  }
}

setupTheme()