import { Nullish } from "builder-util-runtime"
import * as path from "path"
import { PlatformPackager } from "../platformPackager"
import { langIdToName, toLangWithRegion } from "./langs"

export function getLicenseAssets(fileNames: Array<string>, packager: PlatformPackager<any>) {
  return fileNames
    .sort((a, b) => {
      const aW = a.includes("_en") ? 0 : 100
      const bW = b.includes("_en") ? 0 : 100
      return aW === bW ? a.localeCompare(b) : aW - bW
    })
    .map(file => {
      let lang = /_([^.]+)\./.exec(file)![1]
      let langWithRegion
      if (lang.includes("_")) {
        langWithRegion = lang
        lang = langWithRegion.substring(0, lang.indexOf("_"))
      } else {
        lang = lang.toLowerCase()
        langWithRegion = toLangWithRegion(lang)
      }
      return { file: path.join(packager.buildResourcesDir, file), lang, langWithRegion, langName: (langIdToName as any)[lang] }
    })
}

export async function getNotLocalizedLicenseFile(
  custom: string | Nullish,
  packager: PlatformPackager<any>,
  supportedExtension: Array<string> = ["rtf", "txt", "html"]
): Promise<string | null> {
  const possibleFiles: Array<string> = []
  for (const name of ["license", "eula"]) {
    for (const ext of supportedExtension) {
      possibleFiles.push(`${name}.${ext}`)
      possibleFiles.push(`${name.toUpperCase()}.${ext}`)
      possibleFiles.push(`${name}.${ext.toUpperCase()}`)
      possibleFiles.push(`${name.toUpperCase()}.${ext.toUpperCase()}`)
    }
  }

  return await packager.getResource(custom, ...possibleFiles)
}

export async function getLicenseFiles(packager: PlatformPackager<any>): Promise<Array<LicenseFile>> {
  return getLicenseAssets(
    (await packager.resourceList).filter(it => {
      const name = it.toLowerCase()
      return (name.startsWith("license_") || name.startsWith("eula_")) && (name.endsWith(".rtf") || name.endsWith(".txt") || name.endsWith(".html"))
    }),
    packager
  )
}

export interface LicenseFile {
  file: string
  lang: string
  langWithRegion: string
  langName: string
}