const handlers: {
  [index: string]: any
} = {}

const topDirs = ['./handlers']

const readDir = async (dirname: string, onContent: (content: string) => void) => {
  const files: Deno.DirEntry[] = []
  for (const dirEntry of Deno.readDirSync(dirname)) {
    files.push(dirEntry)
  }
  await Promise.all(
    files.map(async (file) => {
      if (file.isFile) {
        const content = await Deno.readTextFile(dirname + '/' + file.name)
        onContent(content)
        return
      }
      if (file.isDirectory) await readDir(`${dirname}/${file.name}`, onContent)
    }),
  )
}

await Promise.all(
  topDirs.map((topDir) =>
    readDir(topDir, (content) => {
      const handler = content.match(/export function [A-z]+\(/g)
      if (handler === null) return
      const transformers = content.match(/bot.transformers.[A-z]+\(/g)
      const event = content.match(/bot.events.[A-z]+\(/)

      handlers[handler.map((handler) => handler.slice(16, -1))[0]] = {
        transformers: transformers === null ? [] : transformers.map((result) => result.slice(4, -1)),
        event: event === null ? undefined : event.map((result) => result.slice(4, -1))[0],
      }
    }),
  ),
)

console.log(handlers)