import { InvalidConfigurationError } from "builder-util"
import { Nullish } from "builder-util-runtime"
import { AppInfo } from "../appInfo"

export function expandMacro(pattern: string, arch: string | Nullish, appInfo: AppInfo, extra: any = {}, isProductNameSanitized = true): string {
  if (arch == null) {
    pattern = pattern
      // tslint:disable-next-line:no-invalid-template-strings
      .replace("-${arch}", "")
      // tslint:disable-next-line:no-invalid-template-strings
      .replace(" ${arch}", "")
      // tslint:disable-next-line:no-invalid-template-strings
      .replace("_${arch}", "")
      // tslint:disable-next-line:no-invalid-template-strings
      .replace("/${arch}", "")
  }

  return pattern.replace(/\${([_a-zA-Z./*+]+)}/g, (match, p1): string => {
    switch (p1) {
      case "productName":
        return isProductNameSanitized ? appInfo.sanitizedProductName : appInfo.productName

      case "arch":
        if (arch == null) {
          // see above, we remove macro if no arch
          return ""
        }
        return arch

      case "author": {
        const companyName = appInfo.companyName
        if (companyName == null) {
          throw new InvalidConfigurationError(`cannot expand pattern "${pattern}": author is not specified`, "ERR_ELECTRON_BUILDER_AUTHOR_UNSPECIFIED")
        }
        return companyName
      }

      case "platform":
        return process.platform

      case "channel":
        return appInfo.channel || "latest"

      default: {
        if (p1 in appInfo) {
          return (appInfo as any)[p1]
        }

        if (p1.startsWith("env.")) {
          const envName = p1.substring("env.".length)
          const envValue = process.env[envName]
          if (envValue == null) {
            throw new InvalidConfigurationError(`cannot expand pattern "${pattern}": env ${envName} is not defined`, "ERR_ELECTRON_BUILDER_ENV_NOT_DEFINED")
          }
          return envValue
        }

        const value = extra[p1]
        if (value == null) {
          throw new InvalidConfigurationError(`cannot expand pattern "${pattern}": macro ${p1} is not defined`, "ERR_ELECTRON_BUILDER_MACRO_NOT_DEFINED")
        } else {
          return value
        }
      }
    }
  })
}