import { Subject, from, interval, take } from 'rxjs';
import { Message, MessageLog, ConnectionRequest } from '../interfaces/general.interface';
import { GrpcServiceMethod } from '../services/grpc.service.method';
import { readFileSync } from 'fs';
import { ServerClientManager } from '../services/server-client.service';
import mongoose from 'mongoose';

// Connect to MongoDB
// mongoose.connect('mongodb://localhost:27017/grpc1')
// const Message = mongoose.model('Message', require('../models/message.schema'))
// Subject for bidirectional communication
const connectionService: ServerClientManager = new ServerClientManager()
const messagesJSON: any = readFileSync('payload.json')
let parsedMessages: any[] = JSON.parse(messagesJSON) // load the fake messages generated for this trial 
let targetserver: string = 'localhost:3001'
let targetserver2: string = 'localhost:3002'
let hostServer: string = 'localhost:3000'
let array: any[] = [] // Used for testing    
let intervalToStreamOutGoingMessage: number = 15


/* Simple Test: 1 to 1 */
// let connectionRequest: ConnectionRequest = {
//   server: {
//     name: 'g1',
//     serverUrl: hostServer,
//     connectionType: 'GRPC',
//     messageToBePublishedFromApplication: new Subject<Message>()
//   },
//   client: {
//     name: 'g2',
//     targetServer: targetserver,
//     connectionType: 'GRPC',
//     messageToBeReceivedFromRemote: new Subject<Message>()
//   }
// }

// connectionService.generateConnection(connectionRequest)

// let generateFakeMessagesToBePublished = stream().pipe(take(1000))

// let generateFakeMessagesToBePublished = from(parsedMessages).pipe(take(5000))
// generateFakeMessagesToBePublished.subscribe({
//   next: message => {
//     let payload: Message = {
//       id: hostServer,
//       message: message
//     }
//     connectionRequest.server.messageToBePublishedFromApplication.next(payload)
//   },
//   error: error => console.error(error),
//   complete: () => console.log(`Completed`)
// })

// stream().subscribe({
//   next: message => {
//     let payload = {
//       id: hostServer,
//       message: message
//     }
//     connectionRequest.server.messageToBePublishedFromApplication.next(payload)
//   }
// })

// connectionRequest.client.messageToBeReceivedFromRemote.subscribe({
//   next: response => {
//     console.log(`Received ${(response.message as MessageLog).appData.msgId} from ${connectionRequest.client.targetServer}`)
//     // Message.create(response)
//     array.push(response)
//   },
//   error: error => console.error(error),
//   complete: () => console.log(`Response for incoming generated. But this will never stop, and should not either.`)
// })



/* Complex Test: 1 to 1*/
// let connectionRequest: ConnectionRequest = {
//   server: {
//     name: 'g1',
//     serverUrl: hostServer,
//     connectionType: 'GRPC',
//     messageToBePublishedfromApplication: new Subject<Message>()
//   },
//   client: {
//     name: 'g2',
//     targetServer: targetserver,
//     connectionType: 'GRPC',
//     messageToBeReceivedFromRemote: new Subject<Message>()
//   }
// }

// connectionService.generateConnection(connectionRequest)

// setTimeout(() => {
//   let message = {
//     id: parsedMessages[10].appData.msgId,
//     message: parsedMessages[10] // Choose this number, because i purposely use the 11th message and change the msgPayload property to query to emulate a request
//   }
//   connectionRequest.server.messageToBePublishedfromApplication.next(message)
// }, 3000)
// setTimeout(() => {
//   let message = {
//     id: parsedMessages[11].appData.msgId,
//     message: parsedMessages[11] // Choose this number, because i purposely use the 12th message and change the msgPayload property to query to emulate a request
//   }
//   connectionRequest.server.messageToBePublishedfromApplication.next(message)
// }, 4000)

// Handler for the incoming Messages from the other side. 
// connectionRequest.client.messageToBeReceivedFromRemote.subscribe({
//   next: request => {
//     // Application logic comes here. This is where the asortment takes place, of decidiing whose messages it belongs of what it is
//     if ((request.message as MessageLog).appData.msgPayload == 'Query') {
//       generateFakeStreamResponse(request).subscribe({
//         next: (responseMessage: Message) => {
//               console.log(`Received ${(response.message as MessageLog).appData.msgId} from ${connectionRequest.client.targetServer}`)
//           connectionRequest.server.messageToBePublishedfromApplication.next(responseMessage)
//         },
//         error: error => console.error(error),
//         complete: () => {
//           console.log(`Stream request for ${request.id} is queued.`) // shpuld be indefinite
//         }
//       })
//     } else {
//       array.push(request)
//       console.log(`Received message: ${(request.message as MessageLog).appData.msgId} from ${request.id}`)
//     }
//   },
//   error: error => console.error(error),
//   complete: () => console.log(`Response for incoming generated. But this will never stop, and should not either.`)
// })



/* Simple Test: 1 to Many */
let connectionRequest1: ConnectionRequest = {
  server: {
    name: 'G0',
    serverUrl: hostServer,
    connectionType: 'GRPC',
    messageToBePublishedFromApplication: new Subject<Message>()
  },
  client: {
    name: 'G1',
    targetServer: targetserver,
    connectionType: 'GRPC',
    messageToBeReceivedFromRemote: new Subject<Message>()
  }
}
let connectionRequest2: ConnectionRequest = {
  server: {
    name: 'G0',
    serverUrl: hostServer,
    connectionType: 'GRPC',
    messageToBePublishedFromApplication: new Subject<Message>()
  },
  client: {
    name: 'G2',
    targetServer: targetserver2,
    connectionType: 'GRPC',
    messageToBeReceivedFromRemote: new Subject<Message>()
  }
}


connectionService.generateConnection(connectionRequest1).then((res) => {
  // console.log(res)
})
connectionService.generateConnection(connectionRequest2).then((res) => {
  // console.log(res)
})

let generateFakeMessagesToBePublished = from(parsedMessages).pipe(take(50))
generateFakeMessagesToBePublished.subscribe({
  next: message => {
    let payload: Message = {
      id: hostServer,
      message: message
    }
    // connectionRequest1.server!.messageToBePublishedFromApplication.next(payload)
    // connectionRequest2.server!.messageToBePublishedFromApplication.next(payload)
  },
  error: error => console.error(error),
  complete: () => console.log(`Completed`)
})


stream().subscribe({
  next: message => {
    let payload = {
      id: hostServer,
      message: message
    }
    connectionRequest1.server!.messageToBePublishedFromApplication.next(payload)
    connectionRequest2.server!.messageToBePublishedFromApplication.next(payload)
  }
})


// connectionRequest.client.messageToBeReceivedFromRemote.subscribe({
//   next: request => {
//     console.log(`Received ${(request.message as MessageLog).appData.msgId} from ${connectionRequest.client.targetServer}`)
//     array.push(request)
//   },
//   error: error => console.error(error),
//   complete: () => console.log(`Response for incoming generated. But this will never stop, and should not either.`)
// })

// connectionRequest2.client.messageToBeReceivedFromRemote.subscribe({
//   next: request => {
//     console.log(`Received ${(request.message as MessageLog).appData.msgId} from ${connectionRequest.client.targetServer}`)
//     array.push(request)
//   },
//   error: error => console.error(error),
//   complete: () => console.log(`Response for incoming generated. But this will never stop, and should not either.`)
// })






/* Complex Test: 1 to Many */
// let connectionRequest: ConnectionRequest = {
//   server: {
//     name: 'g1',
//     serverUrl: hostServer,
//     connectionType: 'GRPC',
//     messageToBePublishedfromApplication: new Subject<Message>()
//   },
//   client: {
//     name: 'g2',
//     targetServer: targetserver,
//     connectionType: 'GRPC',
//     messageToBeReceivedFromRemote: new Subject<Message>()
//   }
// }
// let connectionRequest2: ConnectionRequest = {
//   server: {
//     name: 'g1',
//     serverUrl: hostServer,
//     connectionType: 'GRPC',
//     messageToBePublishedfromApplication: new Subject<Message>()
//   },
//   client: {
//     name: 'g3',
//     targetServer: targetserver2,
//     connectionType: 'GRPC',
//     messageToBeReceivedFromRemote: new Subject<Message>()
//   }
// }

// connectionService.generateConnection(connectionRequest)
// connectionService.generateConnection(connectionRequest2)

// setTimeout(() => {
//   let message = {
//     id: parsedMessages[10].appData.msgId,
//     message: parsedMessages[10] // Choose this number, because i purposely use the 11th message and change the msgPayload property to query to emulate a request
//   }
//   connectionRequest.server.messageToBePublishedfromApplication.next(message)
//   connectionRequest2.server.messageToBePublishedfromApplication.next(message)
// }, 3000)
// setTimeout(() => {
//   let message = {
//     id: parsedMessages[11].appData.msgId,
//     message: parsedMessages[11] // Choose this number, because i purposely use the 12th message and change the msgPayload property to query to emulate a request
//   }
//   connectionRequest.server.messageToBePublishedfromApplication.next(message)
//   connectionRequest2.server.messageToBePublishedfromApplication.next(message)
// }, 4000)

// connectionRequest.client.messageToBeReceivedFromRemote.subscribe({
//   next: request => {
//     // Application logic comes here. This is where the asortment takes place, of deciding whose messages it belongs of what it is
//     if ((request.message as MessageLog).appData.msgPayload == 'Query') {
//       generateFakeStreamResponse(request).subscribe({
//         next: (responseMessage: Message) => {
//           connectionRequest.server.messageToBePublishedfromApplication.next(responseMessage)
//         },
//         error: error => console.error(error),
//         complete: () => {
//           console.log(`Stream request for ${request.id} is queued.`) // should be indefinite
//         }
//       })
//     } else {
// console.log(`Received ${(response.message as MessageLog).appData.msgId} from ${connectionRequest.client.targetServer}`)

//       array.push(request)
//       console.log(`Received message: ${(request.message as MessageLog).appData.msgId} from ${request.id}`)
//     }
//   },
//   error: error => console.error(error),
//   complete: () => console.log(`Response for incoming generated. But this will never stop, and should not either.`)
// })
// connectionRequest2.client.messageToBeReceivedFromRemote.subscribe({
//   next: request => {
//     // Application logic comes here. This is where the asortment takes place, of deciding whose messages it belongs of what it is
//     if ((request.message as MessageLog).appData.msgPayload == 'Query') {
//       generateFakeStreamResponse(request).subscribe({
//         next: (responseMessage: Message) => {
//           connectionRequest2.server.messageToBePublishedfromApplication.next(responseMessage)
//         },
//         error: error => console.error(error),
//         complete: () => {
//           console.log(`Stream request for ${request.id} is queued.`) // should be indefinite
//         }
//       })
//     } else {
//     console.log(`Received ${(response.message as MessageLog).appData.msgId} from ${connectionRequest.client.targetServer}`)

//       array.push(request)
//       console.log(`Received message: ${(request.message as MessageLog).appData.msgId} from ${request.id}`)
//     }
//   },
//   error: error => console.error(error),
//   complete: () => console.log(`Response for incoming generated. But this will never stop, and should not either.`)
// })




// this is just to publish an array of fake data as a Subject
function stream(): Subject<any> {
  let result: Subject<any> = new Subject()
  let messages: any[] = parsedMessages
  let count = 0
  const intervalId = setInterval(() => {
    result.next(messages[count]);
    count++;
    if (count >= 300) {
      clearInterval(intervalId);
      result.complete();
    }
  }, intervalToStreamOutGoingMessage)
  return result
}


function generateFakeStreamResponse(request: any): Subject<any> {
  let res: Subject<any> = new Subject()
  stream().pipe(take(7)).subscribe({
    next: element => {
      let message = {
        id: request.id, // Caller's 
        message: element
      }
      res.next(message)
    },
    error: error => console.error(error),
    complete: () => console.log(`Stream response for ${request.id} has been prepared.`)
  })
  return res
}

/* Checking the values by the end of the test */
interval(5000).subscribe(() => {
  console.log(`All received data: ${array.length}`);
});