import * as fs from 'fs'
import * as path from 'path'
import * as core from '@actions/core'
import * as os from 'os'
import {getCurrentTime} from './timeUtils'

export function getTempDirectory(): string {
   return process.env['runner.tempDirectory'] || os.tmpdir()
}

export function writeObjectsToFile(inputObjects: any[]): string[] {
   const newFilePaths = []

   inputObjects.forEach((inputObject: any) => {
      try {
         const inputObjectString = JSON.stringify(inputObject)

         if (inputObject?.metadata?.name) {
            const fileName = getManifestFileName(
               inputObject.kind,
               inputObject.metadata.name
            )
            fs.writeFileSync(path.join(fileName), inputObjectString)
            newFilePaths.push(fileName)
         } else {
            core.debug(
               'Input object is not proper K8s resource object. Object: ' +
                  inputObjectString
            )
         }
      } catch (ex) {
         core.debug(
            `Exception occurred while writing object to file ${inputObject}: ${ex}`
         )
      }
   })

   return newFilePaths
}

export function writeManifestToFile(
   inputObjectString: string,
   kind: string,
   name: string
): string {
   if (inputObjectString) {
      try {
         const fileName = getManifestFileName(kind, name)
         fs.writeFileSync(path.join(fileName), inputObjectString)
         return fileName
      } catch (ex) {
         throw Error(
            `Exception occurred while writing object to file: ${inputObjectString}. Exception: ${ex}`
         )
      }
   }
}

function getManifestFileName(kind: string, name: string) {
   const filePath = `${kind}_${name}_${getCurrentTime().toString()}`
   const tempDirectory = getTempDirectory()
   return path.join(tempDirectory, path.basename(filePath))
}

export function getFilesFromDirectories(filePaths: string[]): string[] {
   const fullPathSet: Set<string> = new Set<string>()

   filePaths.forEach((fileName) => {
      try {
         if (fs.lstatSync(fileName).isDirectory()) {
            recurisveManifestGetter(fileName).forEach((file) => {
               fullPathSet.add(file)
            })
         } else if (
            getFileExtension(fileName) === 'yml' ||
            getFileExtension(fileName) === 'yaml'
         ) {
            fullPathSet.add(fileName)
         } else {
            core.debug(
               `Detected non-manifest file, ${fileName}, continuing... `
            )
         }
      } catch (ex) {
         throw Error(
            `Exception occurred while reading the file ${fileName}: ${ex}`
         )
      }
   })

   return Array.from(fullPathSet)
}

function recurisveManifestGetter(dirName: string): string[] {
   const toRet: string[] = []

   fs.readdirSync(dirName).forEach((fileName) => {
      const fnwd: string = path.join(dirName, fileName)
      if (fs.lstatSync(fnwd).isDirectory()) {
         toRet.push(...recurisveManifestGetter(fnwd))
      } else if (
         getFileExtension(fileName) === 'yml' ||
         getFileExtension(fileName) === 'yaml'
      ) {
         toRet.push(path.join(dirName, fileName))
      } else {
         core.debug(`Detected non-manifest file, ${fileName}, continuing... `)
      }
   })

   return toRet
}

function getFileExtension(fileName: string) {
   return fileName.slice(((fileName.lastIndexOf('.') - 1) >>> 0) + 2)
}