/*
 * Copyright (c) 2021 William Hubbard. All Rights Reserved.
 *
 * This module contains the browser addon that handles most of the logic for internet songs. When the :browser module is
 * built, this addon is added to the browser's list of extensions. Then, when it is run, the addon will start the
 * intermediary program. Then, it will receive commands from the interface through the intermediary application and
 * manipulate the browser state based on those commands. It will then send the results of those commands back through
 * the intermediary. The addon will also periodically shoot off updates to the browser.
 */
import org.apache.tools.ant.taskdefs.condition.Os

import java.nio.file.Files
import java.nio.file.Paths
import java.nio.file.StandardCopyOption
import java.util.stream.Stream

configurations {
    /**
     * This configuration is used to export the packaged addon for installation into a browser.
     */
    addonBuild {
        canBeConsumed = true
        canBeResolved = false
    }
    /**
     * The nativeApp configuration is used to import a native application that this addon will start when the browser
     * does.
     */
    nativeApp.extendsFrom runtime
}

/**
 * Contains information on the extension being made
 */
interface ExtensionData {
    Property<String> getName()

    Property<String> getDescription()

    Property<String> getId()
}

def extension = project.extensions.create('extension', ExtensionData)
extension.name = "universalmusic"
extension.description = "A link between the Universal Music Player and the web browser."
extension.id = "universalmusic@regis.edu"

/**
 * Creates an addon manifest that defines details for the native application that is run when the app starts.
 */
abstract class BuildManifest extends DefaultTask {
    @OutputFile
    final abstract RegularFileProperty manifests = project.objects.fileProperty()

    @TaskAction
    void join() {
        println "Making build directories!"
        String addonName = project.extension.name.get(), addonDescription = project.extension.description.get(), extensionId = project.extension.id.get()
        File manifest
        File startupScript
        for (Dependency dep : project.configurations.nativeApp.dependencies) {
            File binFiles = new File(dep.dependencyProject.installDist.outputs.getFiles().getSingleFile(), "bin")
            Stream<File> files = Arrays.stream(binFiles.listFiles())
            if (Os.isFamily(Os.FAMILY_WINDOWS)) {
                startupScript = files.filter(file -> file.getName().endsWith(".bat")).findFirst().get()
            } else if (Os.isFamily(Os.FAMILY_UNIX)) {
                startupScript = files.filter(file -> !file.getName().endsWith(".sh")).findFirst().get()
            } else {
                throw new RuntimeException("Unknown OS family")
            }
            manifests.get().asFile.text = "{\n" +
                    "  \"name\": \"$addonName\",\n" +
                    "  \"description\": \"$addonDescription\",\n" +
                    "  \"path\": \"" + startupScript.getAbsolutePath().replace("\\", "\\\\") + "\",\n" +
                    "  \"type\": \"stdio\",\n" +
                    "  \"allowed_extensions\": [\"$extensionId\"]\n" +
                    "}"
            break
        }
    }

}

/**
 * Installs the addon manifest, adding registery keys on Windows and creating the appropriate files on Mac and Linux.
 */
abstract class InstallAddon extends DefaultTask {
    @InputFile
    @SkipWhenEmpty
    final abstract RegularFileProperty inputFile = project.objects.fileProperty()

    @TaskAction
    void join() {
        File file = inputFile.get().asFile
        if (Os.isFamily(Os.FAMILY_WINDOWS)) {
            String name = file.name.substring(0, file.name.lastIndexOf('.'))
            Process p = Runtime.getRuntime()
                    .exec("REG DELETE HKEY_CURRENT_USER\\SOFTWARE\\Mozilla\\NativeMessagingHosts\\${name} /f ")
            p.waitFor()
            p = Runtime.getRuntime()
                    .exec("REG ADD HKEY_CURRENT_USER\\SOFTWARE\\Mozilla\\NativeMessagingHosts\\${name} /ve /d \""
                            + file.getAbsolutePath() + "\" /f ")
            p.waitFor()
        } else if (Os.isFamily(Os.FAMILY_MAC)) {
            Files.copy(file.toPath(), Paths.get(System.getProperty("user.home"), "Library/Application Support/Mozilla/NativeMessagingHosts", file.getName()), StandardCopyOption.REPLACE_EXISTING)
        } else if (Os.isFamily(Os.FAMILY_UNIX)) {
            Files.copy(file.toPath(), Paths.get(System.getProperty("user.home"), ".mozilla/native-messaging-hosts", file.getName()), StandardCopyOption.REPLACE_EXISTING)
        }
    }
}

dependencies {
    nativeApp project(path: ":addonInter", configuration: 'nativeBuild')
}

/**
 * Creates a build manifest that defines details for the native application defined by nativeApp dependencies that will
 * be run.
 */
tasks.register('buildManifest', BuildManifest) {
    manifests = new File(buildDir, "${extension.name.get()}.json")
}

/**
 * Registers the build manifest to the OS, allowing for the native application to run properly.
 * This task depends on buildManifest
 */
def installAddon = tasks.register('installAddon', InstallAddon) {
    inputFile = buildManifest.manifests
}

/**
 * Creates a packaged (albiet unsigned) Firefox addon from the src/main directory.
 * This task is finished by calling installAddon
 */
tasks.register('zipAddon', Zip) {
    dependsOn configurations.nativeApp
    archiveName = "${extension.id.get()}.xpi"
    destinationDir = file("$buildDir/lib")
    from("$projectDir/src/addon/javascript", "$projectDir/src/addon/resources")
    doLast {
        File profiles
        File extention
        if (Os.isFamily(Os.FAMILY_WINDOWS)) {
            profiles = new File(System.getenv("APPDATA"), "Mozilla\\Firefox\\Profiles")
        } else if (Os.isFamily(Os.FAMILY_MAC)) {
            profiles = new File(System.getProperty("user.home"), "Library/Application Support/Firefox/Profiles")
        } else if (Os.isFamily(Os.FAMILY_UNIX)) {
            profiles = new File(System.getProperty("user.home"), ".mozilla/firefox/")
        }
        for (File profile: profiles.listFiles())
        {
            if (profile.isDirectory())
            {
                extention = new File(profile, "extensions/${extension.id.get()}.xpi")
                if (extention.exists())
                {
                    copy {
                        from(zipAddon.outputs)
                        into extention.getParentFile()
                    }
                }
            }
        }
    }
}
zipAddon.finalizedBy installAddon

tasks.register("clean", Delete) {
    delete "$buildDir"
    followSymlinks = false
}

/*
 * Exports the packaged addon task.
 */
artifacts {
    addonBuild(zipAddon)
}