import { Request, parseInput } from "./request";
import { RDATARecord, RecourceRecord } from "./record";
import { MonitoringPlugin, QuestionPlugin, DnsCore, AnswerHandler, ListenerPlugin, StoragePlugin, Record } from "./core";
import assert = require("assert");
import { RecordTypes } from "./types";
import { Question } from "./question";

function fromHex(data: string) {
   return Buffer.from(data.replace(/\s/g, ""), "hex");
}

const itr = 100000;
console.log("All tests x" + itr);

let reqData = fromHex("E835 0100 0001 0000 0000 0000 07 6578616D706c65 03636F6D 00 0001 0001");
console.time("input parser")
for (let i = 0; i < itr; i++) {
   parseInput(reqData);
}
console.timeEnd("input parser")

console.time("complete")
for (let i = 0; i < itr; i++) {
   let request = new Request(reqData, "")
   let rr = new RDATARecord()
   rr.CLASS = 1
   rr.NAME = "example.com"
   rr.TTL = 1600
   rr.TYPE = 1
   rr.RDATA = fromHex("0A 00 00 01")
   request.addAnswer(rr)
   request.serialize()
}
console.timeEnd("complete")

console.time("complete 10 answers")
for (let i = 0; i < itr; i++) {
   let request = new Request(reqData, "")
   let rr = new RDATARecord()
   rr.CLASS = 1
   rr.NAME = "example.com"
   rr.TTL = 1600
   rr.TYPE = 1
   rr.RDATA = fromHex("0A 00 00 01")
   for (let i = 0; i < 10; i++) request.addAnswer(rr);
   request.serialize()
}
console.timeEnd("complete 10 answers")

class TestMonitoringPlugin implements MonitoringPlugin {
   constructor() { }
   async init(core) { }
   Priority = 0
   onRequest(domain, hostname, type) { }
}

class ARR extends RecourceRecord {
   TYPE = RecordTypes.A

   constructor(domain: string, ip: string) {
      super();
      this.NAME = domain
      this.TTL = 1600
      let data = Buffer.alloc(4)
      let idx = 0;
      ip.split(".").forEach(e => {
         data.writeUInt8(Number(e), idx);
         idx++;
      })
      this.dataLock = () => {
         return {
            length: 4,
            serialize: (buffer, offset) => {
               data.copy(buffer, offset);
               return offset + 4;
            }
         }
      };
   }
}

class TestQuestionPlugin implements QuestionPlugin {
   private Core: DnsCore
   QuestionTypes = [RecordTypes.A]
   Priority = 0
   async init(core) {
      this.Core = core;
   }

   async handleQuestion(question: Question, request: AnswerHandler, next: () => void) {
      assert(this.QuestionTypes.find(e => e === <any>question.QTYPE), "Handler was called with not supported question type")
      let parts = question.QNAME.split(".")
      let domain = parts.splice(-2, 2).join(".")
      let hostname = parts.join(".");
      hostname = hostname !== "" ? hostname : "*"
      let records = await this.Core.storageManager.getRecords(domain, hostname, question.QTYPE)
      records.forEach(e => request.addAnswer(new ARR(question.QNAME, e.value)));
   }
}

class TestListenerPlugin implements ListenerPlugin {
   async init(core) { }
   Priority = 0;
   callback: (data: Buffer, sender: string, max_size?: number) => Promise<Buffer>;
   registerCallback(callback) {
      this.callback = callback;
   }

   sendRequest(message: Buffer) {
      return this.callback(message, "localhost")
   }
}


class TestStoragePlugin implements StoragePlugin {
   re: Record = { domain: "example.com", hostname: "test", type: RecordTypes.A, value: "10.0.0.1", ttl: 1600 }

   constructor(record?: Record, private count: number = 1) {
      if (record)
         this.re = record;
   }

   Priority = 0
   NoCache = false
   RecordTypes = [RecordTypes.A]
   isResponsible(domain: string) {
      // console.log("Is responsible")
      return true
   }

   async init(core) { }

   async getRecords(domain, hostname, type) {
      if (domain !== this.re.domain || hostname !== this.re.hostname || type != this.re.type) return undefined;
      let r = [];
      for (let i = 0; i < this.count; i++) {
         r.push(this.re);
      }
      return r;
   }

   async getAllRecordsForDomain(domain) {
      if (domain !== this.re.domain) return undefined;
      return [this.re];
   }
}

let core = new DnsCore();

let listener = new TestListenerPlugin();
core.addListener(listener)
core.addMonitoring(new TestMonitoringPlugin());
core.addQuestion(new TestQuestionPlugin())

let storage = new TestStoragePlugin({
   domain: "example.com",
   hostname: "test",
   type: RecordTypes.A,
   ttl: 500,
   value: "10.0.0.1"
}, 3)
core.addStorage(storage);

core.start().then(async () => {
   let reqData = fromHex("E835 0100 0001 0000 0000 0000 04 74657374 07 6578616D706c65 03 636F6D 00 0001 0001");
   console.time("core handler");
   for (let i = 0; i < itr; i++) {
      await listener.sendRequest(reqData)
   }
   console.timeEnd("core handler");
});