import {Component, ElementRef, EventEmitter, Input, OnInit, Output, ViewChild} from '@angular/core';
import {FormsModule} from '@angular/forms';
import * as flatbuffer_builder from 'org_frc971/external/com_github_google_flatbuffers/ts/builder';
import {ByteBuffer} from 'org_frc971/external/com_github_google_flatbuffers/ts/byte-buffer';
import * as error_response from 'org_frc971/scouting/webserver/requests/messages/error_response_generated';
import * as submit_data_scouting from 'org_frc971/scouting/webserver/requests/messages/submit_data_scouting_generated';
import * as submit_data_scouting_response from 'org_frc971/scouting/webserver/requests/messages/submit_data_scouting_response_generated';

import SubmitDataScouting = submit_data_scouting.scouting.webserver.requests.SubmitDataScouting;
import SubmitDataScoutingResponse = submit_data_scouting_response.scouting.webserver.requests.SubmitDataScoutingResponse;
import ErrorResponse = error_response.scouting.webserver.requests.ErrorResponse;

type Section = 'Team Selection'|'Auto'|'TeleOp'|'Climb'|'Other'|
    'Review and Submit'|'Success';
type Level = 'NoAttempt'|'Failed'|'FailedWithPlentyOfTime'|'Low'|'Medium'|
    'High'|'Transversal';

@Component({
  selector: 'app-entry',
  templateUrl: './entry.ng.html',
  styleUrls: ['../common.css', './entry.component.css']
})
export class EntryComponent {
  section: Section = 'Team Selection';
  @Output() switchTabsEvent = new EventEmitter<string>();
  @Input() matchNumber: number = 1;
  @Input() teamNumber: number = 1;
  autoUpperShotsMade: number = 0;
  autoLowerShotsMade: number = 0;
  autoShotsMissed: number = 0;
  teleUpperShotsMade: number = 0;
  teleLowerShotsMade: number = 0;
  teleShotsMissed: number = 0;
  defensePlayedOnScore: number = 0;
  defensePlayedScore: number = 0;
  level: Level = 'NoAttempt';
  ball1: boolean = false;
  ball2: boolean = false;
  ball3: boolean = false;
  ball4: boolean = false;
  ball5: boolean = false;
  quadrant: number = 1;
  errorMessage: string = '';
  noShow: boolean = false;
  neverMoved: boolean = false;
  batteryDied: boolean = false;
  mechanicallyBroke: boolean = false;
  lostComs: boolean = false;

  @ViewChild('header') header: ElementRef;

  nextSection() {
    if (this.section === 'Team Selection') {
      this.section = 'Auto';
    } else if (this.section === 'Auto') {
      this.section = 'TeleOp';
    } else if (this.section === 'TeleOp') {
      this.section = 'Climb';
    } else if (this.section === 'Climb') {
      this.section = 'Other';
    } else if (this.section === 'Other') {
      this.section = 'Review and Submit';
    } else if (this.section === 'Review and Submit') {
      this.submitDataScouting();
      return;
    } else if (this.section === 'Success') {
      this.switchTabsEvent.emit('MatchList');
      return;
    }
    // Scroll back to the top so that we can be sure the user sees the
    // entire next screen. Otherwise it's easy to overlook input fields.
    this.scrollToTop();
  }

  prevSection() {
    if (this.section === 'Auto') {
      this.section = 'Team Selection';
    } else if (this.section === 'TeleOp') {
      this.section = 'Auto';
    } else if (this.section === 'Climb') {
      this.section = 'TeleOp';
    } else if (this.section === 'Other') {
      this.section = 'Climb';
    } else if (this.section === 'Review and Submit') {
      this.section = 'Other';
    }
    // Scroll back to the top so that we can be sure the user sees the
    // entire previous screen. Otherwise it's easy to overlook input
    // fields.
    this.scrollToTop();
  }

  private scrollToTop() {
    this.header.nativeElement.scrollIntoView();
  }

  async submitDataScouting() {
    this.errorMessage = '';

    const builder =
        new flatbuffer_builder.Builder() as unknown as flatbuffers.Builder;
    SubmitDataScouting.startSubmitDataScouting(builder);
    SubmitDataScouting.addTeam(builder, this.teamNumber);
    SubmitDataScouting.addMatch(builder, this.matchNumber);
    SubmitDataScouting.addMissedShotsAuto(builder, this.autoShotsMissed);
    SubmitDataScouting.addUpperGoalAuto(builder, this.autoUpperShotsMade);
    SubmitDataScouting.addLowerGoalAuto(builder, this.autoLowerShotsMade);
    SubmitDataScouting.addMissedShotsTele(builder, this.teleShotsMissed);
    SubmitDataScouting.addUpperGoalTele(builder, this.teleUpperShotsMade);
    SubmitDataScouting.addLowerGoalTele(builder, this.teleLowerShotsMade);
    SubmitDataScouting.addDefenseRating(builder, this.defensePlayedScore);
    SubmitDataScouting.addAutoBall1(builder, this.ball1);
    SubmitDataScouting.addAutoBall2(builder, this.ball2);
    SubmitDataScouting.addAutoBall3(builder, this.ball3);
    SubmitDataScouting.addAutoBall4(builder, this.ball4);
    SubmitDataScouting.addAutoBall5(builder, this.ball5);
    SubmitDataScouting.addStartingQuadrant(builder, this.quadrant);

    // TODO(phil): Add support for defensePlayedOnScore.
    // TODO(phil): Fix the Climbing score.
    SubmitDataScouting.addClimbing(builder, 1);
    builder.finish(SubmitDataScouting.endSubmitDataScouting(builder));

    const buffer = builder.asUint8Array();
    const res = await fetch(
        '/requests/submit/data_scouting', {method: 'POST', body: buffer});

    if (res.ok) {
      // We successfully submitted the data. Report success.
      this.section = 'Success';
    } else {
      const resBuffer = await res.arrayBuffer();
      const fbBuffer = new ByteBuffer(new Uint8Array(resBuffer));
      const parsedResponse = ErrorResponse.getRootAsErrorResponse(
          fbBuffer as unknown as flatbuffers.ByteBuffer);

      const errorMessage = parsedResponse.errorMessage();
      this.errorMessage =
          `Received ${res.status} ${res.statusText}: "${errorMessage}"`;
    }
  }
}