// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package com.flutter.gradle

import org.gradle.api.Plugin
import org.gradle.api.initialization.Settings
import org.jetbrains.kotlin.gradle.plugin.extraProperties
import java.io.File
import java.nio.file.Paths
import java.util.Properties

private const val FLUTTER_SDK_PATH = "flutterSdkPath"

// Integration tests that cover this class include
// - packages/flutter_tools/test/integration.shard/android_gradle_daemon_cache_test.dart
// - packages/flutter_tools/test/integration.shard/android_plugin_compilesdkversion_mismatch_test.dart
// And can be run by following the README in  packages/flutter_tools/.

/**
 * This plugin applies the native plugin loader plugin (../scripts/native_plugin_loader.gradle.kts)
 * and then configures the main project to `include` each of the loaded flutter plugins.
 */
@Suppress("unused") // This class is used by packages/flutter_tools/gradle/build.gradle.kts.
class FlutterAppPluginLoaderPlugin : Plugin<Settings> {
    override fun apply(settings: Settings) {
        val flutterProjectRoot: File = settings.settingsDir.parentFile

        if (!settings.extraProperties.has(FLUTTER_SDK_PATH)) {
            val properties = Properties()
            val localPropertiesFile = File(settings.rootProject.projectDir, "local.properties")
            localPropertiesFile.inputStream().use { properties.load(it) }
            settings.extraProperties.set(FLUTTER_SDK_PATH, properties.getProperty("flutter.sdk"))
            assert(
                settings.extraProperties.get(FLUTTER_SDK_PATH) != null
            ) { "flutter.sdk not set in local.properties" }
        }

        settings.apply {
            from(
                Paths.get(
                    settings.extraProperties.get(FLUTTER_SDK_PATH) as String,
                    "packages",
                    "flutter_tools",
                    "gradle",
                    "src",
                    "main",
                    "scripts",
                    "native_plugin_loader.gradle.kts"
                )
            )
        }

        NativePluginLoaderReflectionBridge
            .getPlugins(settings.extraProperties, flutterProjectRoot)
            .forEach { androidPlugin ->
                val pluginDirectory = File(androidPlugin["path"] as String, "android")
                check(
                    pluginDirectory.exists()
                ) { "Plugin directory does not exist: ${pluginDirectory.absolutePath}" }
                val pluginName = androidPlugin["name"] as String
                settings.include(":$pluginName")
                settings.project(":$pluginName").projectDir = pluginDirectory
            }
    }
}