// Gradle script for generating serialized public app config (from app.config.js/ts or app.json) and bundling it into the APK 

import org.apache.tools.ant.taskdefs.condition.Os
import org.gradle.util.GradleVersion

void runBefore(String dependentTaskName, Task task) {
  Task dependentTask = tasks.findByPath(dependentTaskName);
  if (dependentTask != null) {
    dependentTask.dependsOn task
  }
}

def expoConstantsDir = ["node", "-e", "console.log(require('path').dirname(require.resolve('expo-constants/package.json')));"].execute([], projectDir).text.trim()

def config = project.hasProperty("react") ? project.react : [];
def nodeExecutableAndArgs = config.nodeExecutableAndArgs ?: ["node"]

afterEvaluate {
  def projectRoot = file("../../")
  def inputExcludes = ["android/**", "ios/**"]

  android.applicationVariants.each { variant ->
    def folderName = variant.name
    def targetName = folderName.capitalize()

    def assetsDir = file("$buildDir/intermediates/merged_assets/${folderName}/out")

    GradleVersion gradleVersion = GradleVersion.current()
    if (gradleVersion < GradleVersion.version('5.0')) {
      assetsDir = file("$buildDir/intermediates/merged_assets/${folderName}/merge${targetName}Assets/out")
    }

    // Bundle task name for variant
    def bundleAppConfigTaskName = "bundle${targetName}ExpoConfig"

    def currentBundleTask = tasks.create(
        name: bundleAppConfigTaskName,
        type: Exec) {
      description = "expo-constants: Bundle app config for ${targetName}."

      // Create dirs if they are not there (e.g. the "clean" task just ran)
      doFirst {
        assetsDir.mkdirs()
      }

      // Set up inputs and outputs so gradle can cache the result
      inputs.files fileTree(dir: projectRoot, excludes: inputExcludes)
      outputs.dir assetsDir

      // Switch to project root and generate the app config
      workingDir projectRoot

      if (Os.isFamily(Os.FAMILY_WINDOWS)) {
        commandLine("cmd", "/c", *nodeExecutableAndArgs, "$expoConstantsDir/scripts/getAppConfig.js", projectRoot, assetsDir)
      } else {
        commandLine(*nodeExecutableAndArgs, "$expoConstantsDir/scripts/getAppConfig.js", projectRoot, assetsDir)
      }
    }

    currentBundleTask.dependsOn("merge${targetName}Resources")
    currentBundleTask.dependsOn("merge${targetName}Assets")

    runBefore("process${targetName}Resources", currentBundleTask)
  }
}