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/***********
This is a demo program to create media streams.
This requires the latest java SDK of OCI.
Takes input of the master playlist name and residing bucket name.
This is intended for a demonstration only and not for Production usage.
************/

/***********
1. Accept User Input of Object Storage Bucket name & HLS Master playlist (m3u8).
(Note: This takes only master.m3u8 and not sub-playlists as input)
2. Create Media Client. 
3. Create Distribution Channel.
4. Configure CDN for Distribution Channel.
5. Create Stream Packaging Configuration.
6. Create Asset ID  for the provided input master playlist.
7. Ingest the Asset ID into the Distribution Channel.
8. Create MediaStreams Client with distribution channel as endpoint. 
9. After Ingest complete, generate Session Token. 
10. Display's URL that is HLS streamable. 
************/

import com.oracle.bmc.auth.InstancePrincipalsAuthenticationDetailsProvider;
import com.oracle.bmc.auth.AuthenticationDetailsProvider;
import com.oracle.bmc.auth.ConfigFileAuthenticationDetailsProvider;
import com.oracle.bmc.mediaservices.MediaServicesClient;
import com.oracle.bmc.mediaservices.*;
import com.oracle.bmc.mediaservices.requests.*;
import com.oracle.bmc.mediaservices.responses.*;
import com.oracle.bmc.mediaservices.model.*;
import com.oracle.bmc.mediaservices.requests.CreateStreamCdnConfigRequest;
import com.oracle.bmc.mediaservices.requests.CreateStreamDistributionChannelRequest;
import com.oracle.bmc.mediaservices.requests.CreateMediaAssetRequest;
import com.oracle.bmc.mediaservices.requests.CreateStreamPackagingConfigRequest;
import com.oracle.bmc.mediaservices.requests.IngestStreamDistributionChannelRequest;
import com.oracle.bmc.mediaservices.responses.CreateMediaAssetResponse;
import com.oracle.bmc.mediaservices.responses.CreateStreamCdnConfigResponse;
import com.oracle.bmc.mediaservices.responses.CreateStreamDistributionChannelResponse;
import com.oracle.bmc.mediaservices.responses.CreateStreamPackagingConfigResponse;
import com.oracle.bmc.mediaservices.responses.IngestStreamDistributionChannelResponse;
import com.oracle.bmc.mediaservices.model.IngestStreamDistributionChannelResult;
import com.oracle.bmc.mediaservices.model.MediaAsset;
import com.oracle.bmc.mediaservices.model.StreamCdnConfig;
import com.oracle.bmc.mediaservices.model.StreamDistributionChannel;
import com.oracle.bmc.mediaservices.model.StreamPackagingConfig;
import com.oracle.bmc.mediaservices.MediaStreamClient;
import com.oracle.bmc.mediaservices.model.CreateStreamDistributionChannelDetails;
import com.oracle.bmc.mediaservices.model.CreateStreamCdnConfigDetails;
import com.oracle.bmc.mediaservices.model.IngestStreamDistributionChannelDetails;
import com.oracle.bmc.mediaservices.requests.CreateStreamDistributionChannelRequest;
import com.oracle.bmc.mediaservices.model.EdgeStreamCdnConfig;
import com.oracle.bmc.mediaservices.model.StreamCdnConfigSection;
import com.oracle.bmc.mediaservices.model.CreateStreamPackagingConfigDetails.StreamPackagingFormat;
import com.oracle.bmc.mediaservices.model.StreamPackagingConfigEncryptionNone;
import com.oracle.bmc.mediaservices.model.AssetType;
import com.oracle.bmc.mediaservices.requests.GenerateSessionTokenRequest;
import com.oracle.bmc.mediaservices.model.GenerateSessionTokenDetails;
import com.oracle.bmc.mediaservices.requests.GetMediaWorkflowJobRequest;
import com.oracle.bmc.mediaservices.responses.GetMediaWorkflowJobResponse;
import com.oracle.bmc.mediaservices.model.MediaWorkflowJob.LifecycleState;

import org.json.simple.*; 
import org.json.simple.parser.*;
import java.util.Collections;
import java.util.*;
import java.util.Scanner;

public class MediastreamsDemoApp {

    // User Input 
    public static String[] getUserInput(){
        String[] inputs = new String[2];
        MediastreamsDemoApp.printString("\n", "Enter name of bucket where master playlist is located:");
        Scanner input = new Scanner(System.in);
        String inputBucketName = input.nextLine();
        MediastreamsDemoApp.printString("\n","Enter name of master playlist to be ingested:");
        String inputPlaylistName = input.nextLine();
        input.close();
        inputs[0] = inputBucketName;
        inputs[1] = inputPlaylistName;
        return inputs;
    }
    // Print Function
    public static void printString(Object stringtoPrint , Object stringtoPrint2){
        System.out.println(stringtoPrint);
        System.out.println(stringtoPrint2);
    }

    // Media Client Creation by default with Instance Principal.
    // Toggle the other java lines in this code for User Principal.
    public static MediaServicesClient connectMediaService(){
        InstancePrincipalsAuthenticationDetailsProvider provider = InstancePrincipalsAuthenticationDetailsProvider.builder().build();
        MediaServicesClient mediaClient =  new MediaServicesClient(provider);
        // User Principal
        // Read config from the profile DEFAULT in the file "~/.oci/config". You can switch to different profile.
        // AuthenticationDetailsProvider authenticationDetailsProvider = new ConfigFileAuthenticationDetailsProvider(PROFILE_DEFAULT);
        // MediaServicesClient mediaClient = MediaServicesClient.builder().build(authenticationDetailsProvider);
        return mediaClient;
    }
    // Closing Media Client
    public static void closeMediaService(MediaServicesClient mc,MediaStreamClient ms){
        mc.close();
        ms.close();
        MediastreamsDemoApp.printString("\n", "Media Clients are Closed");
    }
    // Create Media Streams Client 
    // Default this program creates using Instance Principal
    public static MediaStreamClient connectMediaStreams(StreamDistributionChannel dc){
        String endpoint = dc.getDomainName();
        InstancePrincipalsAuthenticationDetailsProvider provider = InstancePrincipalsAuthenticationDetailsProvider.builder().build();
        MediaStreamClient mediaStreamsClient =  new MediaStreamClient(provider);
        // User Principal
        // Read config from the profile DEFAULT in the file "~/.oci/config". You can switch to different profile.
        // AuthenticationDetailsProvider authenticationDetailsProvider = new ConfigFileAuthenticationDetailsProvider(PROFILE_DEFAULT);
        // MediaStreamClient mediaStreamsClient = MediaStreamClient.builder().build(authenticationDetailsProvider);
        mediaStreamsClient.setEndpoint("https://"+endpoint);
        MediastreamsDemoApp.printString("\n" ,"Media Streams Client Instatiated Successfully");
        return mediaStreamsClient;
    }
    // Create Distribution Channel 
    public static StreamDistributionChannel createDistributionChannel(MediaServicesClient mc, String compartment_id){
        CreateStreamDistributionChannelRequest  request = CreateStreamDistributionChannelRequest.builder().createStreamDistributionChannelDetails(CreateStreamDistributionChannelDetails.builder().displayName("test-java-sdk").compartmentId(compartment_id).build()).build();
        CreateStreamDistributionChannelResponse response = mc.createStreamDistributionChannel(request);
        StreamDistributionChannel dc = response.getStreamDistributionChannel();
        return dc;
    }
    //Create CDN - In this case, its OCI Edge.
    public static void createCDN(MediaServicesClient mc, String compartment_id, StreamDistributionChannel dc){
        String channelId = dc.getId();
        CreateStreamCdnConfigRequest  request = CreateStreamCdnConfigRequest.builder().createStreamCdnConfigDetails(
                                                                        CreateStreamCdnConfigDetails.builder().displayName("test-java-sdk").isEnabled(true).distributionChannelId(channelId).config(EdgeStreamCdnConfig.builder().build()).build()).build();
        CreateStreamCdnConfigResponse response = mc.createStreamCdnConfig(request);
        StreamCdnConfig cdnConfig = response.getStreamCdnConfig();
    }
    // Create Streaming Package Configuration 
    // By default Unencrypted in this code. 
    public static StreamPackagingConfig createStreamPackage(MediaServicesClient mc, StreamDistributionChannel dc){
        String channelId = dc.getId();
        // Unencrypted Stream
        CreateStreamPackagingConfigRequest  request = CreateStreamPackagingConfigRequest.builder().createStreamPackagingConfigDetails(CreateStreamPackagingConfigDetails.builder().displayName("test-java-sdk").distributionChannelId(channelId).streamPackagingFormat(CreateStreamPackagingConfigDetails.StreamPackagingFormat.valueOf("Hls")).segmentTimeInSeconds(6).encryption(StreamPackagingConfigEncryptionNone.builder().build()).build()).build();
        // AES 128 encrypted stream
        //CreateStreamPackagingConfigRequest  request = CreateStreamPackagingConfigRequest.builder().createStreamPackagingConfigDetails(CreateStreamPackagingConfigDetails.builder().displayName("test-java-sdk").distributionChannelId(channelId).streamPackagingFormat(CreateStreamPackagingConfigDetails.StreamPackagingFormat.valueOf("Hls")).segmentTimeInSeconds(6).encryption(StreamPackagingConfigEncryptionAes128.builder().build()).build()).build();
        CreateStreamPackagingConfigResponse response = mc.createStreamPackagingConfig(request);
        StreamPackagingConfig packageConfig = response.getStreamPackagingConfig();
        return packageConfig;
    }
    // Create Media Asset ID for given master playlist 
    public static MediaAsset createAsset(MediaServicesClient mc, String inputBucket,String masterPlayList, String namespace, String compartmentId){
        CreateMediaAssetRequest  request = CreateMediaAssetRequest.builder().createMediaAssetDetails(CreateMediaAssetDetails.builder().bucketName(inputBucket).displayName("test-java-sdk").objectName(masterPlayList).namespaceName(namespace).type(AssetType.valueOf("Playlist")).compartmentId(compartmentId).build()).build();
        CreateMediaAssetResponse response = mc.createMediaAsset(request);
        MediaAsset mediaAsset = response.getMediaAsset();
        return mediaAsset;
    }
    // Ingest the Master Playlist to Distribution Channel 
    public static IngestStreamDistributionChannelResult ingestAsset(MediaServicesClient mc, MediaAsset ma, StreamDistributionChannel dc, String compartmentId){
        String assetId = ma.getId();
        String channelId = dc.getId();
        IngestStreamDistributionChannelRequest request = IngestStreamDistributionChannelRequest.builder().ingestStreamDistributionChannelDetails(AssetMetadataEntryDetails.builder().mediaAssetId(assetId).compartmentId(compartmentId).build()).streamDistributionChannelId(channelId).build();
        IngestStreamDistributionChannelResponse response = mc.ingestStreamDistributionChannel(request);
        IngestStreamDistributionChannelResult ingestResult = response.getIngestStreamDistributionChannelResult();
        return ingestResult;
    }
    // Get the Media WorkflowJob ID for the Ingest Job
    public static MediaWorkflowJob checkIngestJobStatus(MediaServicesClient mc, IngestStreamDistributionChannelResult ingestStatus) {
        String mediaWorkflowId = ingestStatus.getMediaWorkflowJobId(); 
        GetMediaWorkflowJobRequest request = GetMediaWorkflowJobRequest.builder().mediaWorkflowJobId(mediaWorkflowId).build();
        GetMediaWorkflowJobResponse response = mc.getMediaWorkflowJob(request);
        MediaWorkflowJob mediaWorkflowJob = response.getMediaWorkflowJob();
        return mediaWorkflowJob;
    }
    // Check the status of the Ingest Job using above Media Workflow Job ID
    public static String jobLifecycleState(MediaServicesClient mediaClient,IngestStreamDistributionChannelResult ingestStatus){
        MediaWorkflowJob mediaWorkflowJob = MediastreamsDemoApp.checkIngestJobStatus(mediaClient,ingestStatus);
        MediaWorkflowJob.LifecycleState lifestate = mediaWorkflowJob.getLifecycleState();
        String ingestCurrentStatus = lifestate.getValue();
        return ingestCurrentStatus;
    }
    // Create Session Token 
    // Defaults to 24 hour validity 
    public static SessionToken generateSessionToken(MediaStreamClient ms, StreamPackagingConfig sp, MediaAsset ma){
        String streamPackagingId = sp.getId();
        String mediaAssetId = ma.getId();
        List<GenerateSessionTokenDetails.Scopes> scopes = new ArrayList<GenerateSessionTokenDetails.Scopes>();
        scopes.add(GenerateSessionTokenDetails.Scopes.valueOf("Edge")); 
        scopes.add(GenerateSessionTokenDetails.Scopes.valueOf("Playlist"));
        List<String> assetIds = new ArrayList<String>();
        assetIds.add(mediaAssetId);
        GenerateSessionTokenRequest request = GenerateSessionTokenRequest.builder().generateSessionTokenDetails(GenerateSessionTokenDetails.builder().packagingConfigId(streamPackagingId).scopes(scopes).assetIds(assetIds).build()).build();
        GenerateSessionTokenResponse response = ms.generateSessionToken(request);
        SessionToken sessionToken = response.getSessionToken();
        return sessionToken;

    }

    public static void spinningWheel() throws InterruptedException{
        String a = "|/-\\";
        while (true) {
            for (int i = 0; i < 4; i++) {
                System.out.print("\033[0;0H");   // place cursor at top left corner
                for (int j = 0; j < 80; j++) {   // 80 character terminal width, say
                    System.out.print(a.charAt(i));
                }
                Thread.sleep(250);
            }
        }
    }

    public static void main(String[] args) throws InterruptedException{

        // **Variable Declarations** //
        String compartment_id = "ocid1.compartment.oc1..aaaaaaaabhuut4zoztxlfneotrwuauqt5wjhmj4kxaka6ajme4ipxqlcwv6a";
        String namespace = "axjagzvlc4vi";
        
        String [] inputs = MediastreamsDemoApp.getUserInput();
        String inputBucket = inputs[0];
        String masterPlayList = inputs[1];
        // Connect to media services 
        MediaServicesClient mediaClient = MediastreamsDemoApp.connectMediaService();
        MediastreamsDemoApp.printString("\n", "Media Client Instatiated Successfully");
        // Create Distribution Channel
        StreamDistributionChannel distributionChannel = MediastreamsDemoApp.createDistributionChannel(mediaClient, compartment_id);
        MediastreamsDemoApp.printString("\n Distribution Channel Created Successfully",distributionChannel.getId());
        // Configure CDN for the distribution channel
        MediastreamsDemoApp.createCDN(mediaClient, compartment_id, distributionChannel);
        // Create stream packaging Configuration
        StreamPackagingConfig streamPackageConfig = MediastreamsDemoApp.createStreamPackage(mediaClient, distributionChannel);
        MediastreamsDemoApp.printString("\n Streaming Packaging Configuration Created Successfully", streamPackageConfig.getId());
        // Create Media Asset for provided master playlist
        MediaAsset mediaAsset = MediastreamsDemoApp.createAsset(mediaClient, inputBucket, masterPlayList, namespace, compartment_id);
        MediastreamsDemoApp.printString("\n Media Asset Registered Successfully" , mediaAsset.getId());
        // Initiate Ingest of the master playlist into the Distribution channel
        IngestStreamDistributionChannelResult ingestStatus = MediastreamsDemoApp.ingestAsset(mediaClient, mediaAsset, distributionChannel, compartment_id);
        MediastreamsDemoApp.printString("\n Ingest of Asset Initiated with Job", ingestStatus.getMediaWorkflowJobId());
        // Run Loop for ingest job to complete.      
        boolean status = false;
        System.out.print("Ingesting");
        while (!status){
            String ingestValue = MediastreamsDemoApp.jobLifecycleState(mediaClient,ingestStatus);
            System.out.print(".");
            Thread.sleep(3000);
            //System.out.println(ingestCurrentStatus);
            if ((ingestValue == "SUCCEEDED") || (ingestValue == "FAILED")){
                break;
            }
        }
        String ingestOutcome = MediastreamsDemoApp.jobLifecycleState(mediaClient,ingestStatus);
        MediastreamsDemoApp.printString("\nIngest Completed with status", ingestOutcome);

        if (ingestOutcome == "SUCCEEDED") {
            // Create media Streams Client with distribution cahnnel 
            MediaStreamClient mediaStreamsClient = MediastreamsDemoApp.connectMediaStreams(distributionChannel);
            // Generate session token for the master playlist.
            SessionToken sessionToken = MediastreamsDemoApp.generateSessionToken(mediaStreamsClient, streamPackageConfig, mediaAsset);
            //MediastreamsDemoApp.printString(sessionToken.getToken());
            MediastreamsDemoApp.printString("\n\nStream Media with your player:\n\n","https://"+distributionChannel.getDomainName()+"/20211101/actions/generatePlaylist?mediaAssetId="+mediaAsset.getId()+"&streamPackagingConfigId="+streamPackageConfig.getId()+"&token="+sessionToken.getToken());
            // Close the Media Clients
            MediastreamsDemoApp.closeMediaService(mediaClient,mediaStreamsClient);
        }
        else {
            mediaClient.close();
        }

    }
}