import _ from 'lodash';
import {
  AfterContentChecked,
  Component,
  OnInit,
  ViewChild
} from '@angular/core';
import {ActivatedRoute, Router} from '@angular/router';
import {AutocompleteService} from '../services/autocomplete.service';
import {ApiService} from '../services/api.service';
import {MaterialModel} from '../models/material.model';
import {SampleModel} from '../models/sample.model';
import {NgForm, Validators} from '@angular/forms';
import {ValidationService} from '../services/validation.service';
import {TemplateModel} from '../models/template.model';
import {MeasurementModel} from '../models/measurement.model';
import { ChartOptions } from 'chart.js';
import {animate, style, transition, trigger} from '@angular/animations';
import {Observable} from 'rxjs';

// TODO: tests
// TODO: confirmation for new group/supplier
// TODO: work on better recognition for file input
// TODO: only show condition (if not set) and measurements in edit sample dialog at first
// TODO: multiple spectra
// TODO: multiple samples for base data, extend multiple measurements, conditions

// TODO: material properties, color (in material and sample (not required))

// TODO: device autocomplete

@Component({
  selector: 'app-sample',
  templateUrl: './sample.component.html',
  styleUrls: ['./sample.component.scss'],
  animations: [
    trigger(
      'inOut', [
        transition(':enter', [
          style({height: 0, opacity: 0}),
          animate('0.5s ease-out', style({height: '*', opacity: 1}))
        ]),
        transition(':leave', [
          style({height: '*', opacity: 1}),
          animate('0.5s ease-in', style({height: 0, opacity: 0}))
        ])
      ]
    )
  ]
})
export class SampleComponent implements OnInit, AfterContentChecked {

  @ViewChild('sampleForm') sampleForm: NgForm;

  new;  // true if new sample should be created
  newMaterial = false;  // true if new material should be created
  materials: MaterialModel[] = [];  // all materials
  suppliers: string[] = [];  // all suppliers
  groups: string[] = [];  // all groups
  conditionTemplates: TemplateModel[];  // all conditions
  condition: TemplateModel | null = null;  // selected condition
  materialTemplates: TemplateModel[];  // all material templates
  materialTemplate: TemplateModel | null = null;  // selected material template
  materialNames = [];  // names of all materials
  material = new MaterialModel();  // object of current selected material
  sample = new SampleModel();
  customFields: [string, string][] = [['', '']];
  sampleReferences: [string, string, string][] = [['', '', '']];
  sampleReferenceFinds: {_id: string, number: string}[] = [];  // raw sample reference data from db
  currentSRIndex = 0;  // index of last entered sample reference
  availableCustomFields: string[] = [];
  sampleReferenceAutocomplete: string[][] = [[]];
  responseData: SampleModel;  // gets filled with response data after saving the sample
  measurementTemplates: TemplateModel[];
  loading = 0;  // number of currently loading instances
  checkFormAfterInit = false;
  charts = [];  // chart data for spectrums
  readonly chartInit = [{
    data: [],
    label: 'Spectrum',
    showLine: true,
    fill: false,
    pointRadius: 0,
    borderColor: '#00a8b0',
    borderWidth: 2
  }];
  readonly chartOptions: ChartOptions = {
    scales: {
      xAxes: [{ticks: {min: 400, max: 4000, stepSize: 400, reverse: true}}],
      yAxes: [{ticks: {min: 0, max: 1}}]
    },
    responsive: true,
    tooltips: {enabled: false},
    hover: {mode: null},
    maintainAspectRatio: true,
    plugins: {datalabels: {display: false}}
  };

  constructor(
    private router: Router,
    private route: ActivatedRoute,
    private api: ApiService,
    private validation: ValidationService,
    public autocomplete: AutocompleteService
  ) { }

  ngOnInit(): void {
    this.new = this.router.url === '/samples/new';
    this.loading = 7;
    this.api.get<MaterialModel[]>('/materials?status=all', (data: any) => {
      this.materials = data.map(e => new MaterialModel().deserialize(e));
      this.materialNames = data.map(e => e.name);
      this.loading--;
    });
    this.api.get<string[]>('/material/suppliers', (data: any) => {
      this.suppliers = data;
      this.loading--;
    });
    this.api.get<string[]>('/material/groups', (data: any) => {
      this.groups = data;
      this.loading--;
    });
    this.api.get<TemplateModel[]>('/template/conditions', data => {
      this.conditionTemplates = data.map(e => new TemplateModel().deserialize(e));
      this.loading--;
    });
    this.api.get<TemplateModel[]>('/template/materials', data => {
      this.materialTemplates = data.map(e => new TemplateModel().deserialize(e));
      this.selectMaterialTemplate(this.materialTemplates[0]._id);
      this.loading--;
    });
    this.api.get<TemplateModel[]>('/template/measurements', data => {
      this.measurementTemplates = data.map(e => new TemplateModel().deserialize(e));
      if (!this.new) {
        this.loading++;
        this.api.get<SampleModel>('/sample/' + this.route.snapshot.paramMap.get('id'), sData => {
          this.sample.deserialize(sData);
          this.charts = [];
          const spectrumTemplate = this.measurementTemplates.find(e => e.name === 'spectrum')._id;
          let spectrumCounter = 0;
          this.sample.measurements.forEach((measurement, i) => {
            this.charts.push(_.cloneDeep(this.chartInit));
            if (measurement.measurement_template === spectrumTemplate) {
              setTimeout(() => {
                this.generateChart(measurement.values.dpt, i);
                console.log(this.charts);
              }, spectrumCounter * 20);
              spectrumCounter ++;
            }
          });
          this.material = sData.material;
          this.customFields = this.sample.notes.custom_fields && this.sample.notes.custom_fields !== {} ? Object.keys(this.sample.notes.custom_fields).map(e => [e, this.sample.notes.custom_fields[e]]) : [['', '']];
          if (this.sample.notes.sample_references.length) {
            this.sampleReferences = [];
            this.sampleReferenceAutocomplete = [];
            let loadCounter = this.sample.notes.sample_references.length;
            this.sample.notes.sample_references.forEach(reference => {
              this.api.get<SampleModel>('/sample/' + reference.sample_id, srData => {
                this.sampleReferences.push([srData.number, reference.relation, reference.sample_id]);
                this.sampleReferenceAutocomplete.push([srData.number]);
                if (!--loadCounter) {
                  this.sampleReferences.push(['', '', '']);
                  this.sampleReferenceAutocomplete.push([]);
                  console.log(this.sampleReferences);
                  console.log(this.sampleReferenceAutocomplete);
                }
              });
            });
          }
          if ('condition_template' in this.sample.condition) {
            this.selectCondition(this.sample.condition.condition_template);
          }
          console.log('data loaded');
          this.loading--;
          this.checkFormAfterInit = true;
        });
      }
      this.loading--;
    });
    this.api.get<TemplateModel[]>('/sample/notes/fields', data => {
      this.availableCustomFields = data.map(e => e.name);
      this.loading--;
    });
  }

  ngAfterContentChecked() {
    // attach validators to dynamic condition fields when all values are available and template was fully created
    if (this.condition && this.condition.hasOwnProperty('parameters') && this.condition.parameters.length > 0 && this.condition.parameters[0].hasOwnProperty('range') && this.sampleForm && this.sampleForm.form.get('conditionParameter0')) {
      for (const i in this.condition.parameters) {
        if (this.condition.parameters[i]) {
          this.attachValidator('conditionParameter' + i, this.condition.parameters[i].range, true);
        }
      }
    }

    // attach validators to dynamic material fields when all values are available and template was fully created
    if (this.materialTemplate && this.materialTemplate.hasOwnProperty('parameters') && this.materialTemplate.parameters.length > 0 && this.materialTemplate.parameters[0].hasOwnProperty('range') && this.sampleForm && this.sampleForm.form.get('materialParameter0')) {
      for (const i in this.materialTemplate.parameters) {
        if (this.materialTemplate.parameters[i]) {
          this.attachValidator('materialParameter' + i, this.materialTemplate.parameters[i].range, true);
        }
      }
    }

    if (this.sampleForm && this.sampleForm.form.get('measurementParameter0-0')) {
      this.sample.measurements.forEach((measurement, mIndex) => {
        const template = this.getMeasurementTemplate(measurement.measurement_template);
        for (const i in template.parameters) {
          if (template.parameters[i]) {
            this.attachValidator('measurementParameter' + mIndex + '-' + i, template.parameters[i].range, false);
          }
        }
      });
      if (this.checkFormAfterInit) {
        this.checkFormAfterInit = false;
        this.initialValidate();
      }
    }
  }

  initialValidate() {
    console.log('initVal');
    Object.keys(this.sampleForm.form.controls).forEach(field => {
      this.sampleForm.form.get(field).updateValueAndValidity();
    });
  }

  attachValidator(name: string, range: {[prop: string]: any}, required: boolean) {
    if (this.sampleForm.form.get(name)) {
      const validators = [];
      if (required) {
        validators.push(Validators.required);
      }
      if (range.hasOwnProperty('values')) {
        validators.push(this.validation.generate('stringOf', [range.values]));
      }
      else if (range.hasOwnProperty('min') && range.hasOwnProperty('max')) {
        validators.push(this.validation.generate('minMax', [range.min, range.max]));
      }
      else if (range.hasOwnProperty('min')) {
        validators.push(this.validation.generate('min', [range.min]));
      }
      else if (range.hasOwnProperty('max')) {
        validators.push(this.validation.generate('max', [range.max]));
      }
      this.sampleForm.form.get(name).setValidators(validators);
    }
  }

  saveSample() {
    new Promise<void>(resolve => {
      if (this.newMaterial) {  // save material first if new one exists
        this.material.numbers = this.material.numbers.filter(e => e !== '');
        this.api.post<MaterialModel>('/material/new', this.material.sendFormat(), data => {
          this.materials.push(data);  // add material to data
          this.material = data;
          this.sample.material_id = data._id;  // add new material id to sample data
          resolve();
        });
      }
      else {
        resolve();
      }
    }).then(() => {  // save sample
      this.sample.notes.custom_fields = {};
      this.customFields.forEach(element => {
        if (element[0] !== '') {
          this.sample.notes.custom_fields[element[0]] = element[1];
        }
      });
      this.sample.notes.sample_references = this.sampleReferences.filter(e => e[0] && e[1] && e[2]).map(e => ({sample_id: e[2], relation: e[1]}));
      new Promise<SampleModel>(resolve => {
        if (this.new) {
          this.api.post<SampleModel>('/sample/new', this.sample.sendFormat(), resolve);
        }
        else {
          this.api.put<SampleModel>('/sample/' + this.sample._id, this.sample.sendFormat(), resolve);
        }
      }).then( data => {
        this.responseData = new SampleModel().deserialize(data);
        this.material = this.materials.find(e => e._id === this.responseData.material_id);
        this.sample.measurements.forEach(measurement => {
          if (Object.keys(measurement.values).map(e => measurement.values[e]).join('') !== '') {
            Object.keys(measurement.values).forEach(key => {
              measurement.values[key] = measurement.values[key] === '' ? null : measurement.values[key];
            });
            if (measurement._id === null) {  // new measurement
              measurement.sample_id = data._id;
              this.api.post<MeasurementModel>('/measurement/new', measurement.sendFormat());
            }
            else {  // update measurement
              this.api.put<MeasurementModel>('/measurement/' + measurement._id, measurement.sendFormat(['sample_id', 'measurement_template']));
            }
          }
          else if (measurement._id !== null) {  // existing measurement was left empty to delete
            this.api.delete('/measurement/' + measurement._id);
          }
        });
      });
    });
  }

  findMaterial(name) {
    const res = this.materials.find(e => e.name === name);  // search for match
    if (res) {
      this.material = _.cloneDeep(res);
      this.sample.material_id = this.material._id;
    }
    else {
      if (this.sample.material_id !== null) {  // reset previous match
        this.material = new MaterialModel();
      }
      this.sample.material_id = null;
    }
    this.setNewMaterial();
  }

  preventDefault(event) {
    if (event.key && event.key === 'Enter' || event.type === 'dragover') {
      event.preventDefault();
    }
  }

  // TODO: rework later
  setNewMaterial(value = null) {
    if (value === null) {
      this.newMaterial = !this.sample.material_id;
    }
    else if (value || (!value && this.sample.material_id !== null )) {  // set to false only if material already exists
      this.newMaterial = value;
    }
    if (this.newMaterial) {
      this.sampleForm.form.get('materialname').setValidators([Validators.required]);
    }
    else {
      this.sampleForm.form.get('materialname').setValidators([Validators.required, this.validation.generate('stringOf', [this.materialNames])]);
    }
    this.sampleForm.form.get('materialname').updateValueAndValidity();
  }

  handleMaterialNumbers() {
    const fieldNo = this.material.numbers.length;
    const filledFields = this.material.numbers.filter(e => e !== '').length;
    // append new field
    if (filledFields === fieldNo) {
      this.material.numbers.push('');
    }
    // remove if two end fields are empty
    if (fieldNo > 1 && this.material.numbers[fieldNo - 1] === '' && this.material.numbers[fieldNo - 2] === '') {
      this.material.numbers.pop();
    }
  }

  selectCondition(id) {
    this.condition = this.conditionTemplates.find(e => e._id === id);
    console.log(this.condition);
    console.log(this.sample);
    if ('condition_template' in this.sample.condition) {
      this.sample.condition.condition_template = id;
    }
  }

  selectMaterialTemplate(id) {
    this.materialTemplate = this.materialTemplates.find(e => e._id === id);
    if ('material_template' in this.material.properties) {
      this.material.properties.material_template = id;
    }
  }

  getMeasurementTemplate(id): TemplateModel {
    return this.measurementTemplates && id ? this.measurementTemplates.find(e => e._id === id) : new TemplateModel();
  }

  addMeasurement() {
    this.sample.measurements.push(new MeasurementModel(this.measurementTemplates[0]._id));
    this.charts.push(_.cloneDeep(this.chartInit));
  }

  removeMeasurement(index) {
    if (this.sample.measurements[index]._id !== null) {
      this.api.delete('/measurement/' + this.sample.measurements[index]._id);
    }
    this.sample.measurements.splice(index, 1);
    this.charts.splice(index, 1);
  }

  clearChart(index) {
    this.charts[index][0].data = [];
  }

  fileToArray(files, mIndex, parameter) {
    const fileReader = new FileReader();
    fileReader.onload = () => {
      this.sample.measurements[mIndex].values[parameter] = fileReader.result.toString().split('\r\n').map(e => e.split(','));
      this.generateChart(this.sample.measurements[mIndex].values[parameter], mIndex);
    };
    fileReader.readAsText(files[0]);
  }

  generateChart(spectrum, index) {
    this.charts[index][0].data = spectrum.map(e => ({x: parseFloat(e[0]), y: parseFloat(e[1])}));
  }

  toggleCondition() {
    if (this.condition) {
      this.condition = null;
    }
    else {
      this.sample.condition = {condition_template: null};
      this.selectCondition(this.conditionTemplates[0]._id);
    }
  }

  adjustCustomFields(value, index) {
    this.customFields[index][0] = value;
    const fieldNo = this.customFields.length;
    let filledFields = 0;
    this.customFields.forEach(field => {
      if (field[0] !== '') {
        filledFields ++;
      }
    });
    // append new field
    if (filledFields === fieldNo) {
      this.customFields.push(['', '']);
    }
    // remove if two end fields are empty
    if (fieldNo > 1 && this.customFields[fieldNo - 1][0] === '' && this.customFields[fieldNo - 2][0] === '') {
      this.customFields.pop();
    }
  }

  checkSampleReference(value, index) {
    if (value) {
      this.sampleReferences[index][0] = value;
    }
    this.currentSRIndex = index;
    const fieldNo = this.sampleReferences.length;
    let filledFields = 0;
    this.sampleReferences.forEach(field => {
      if (field[0] !== '') {
        filledFields ++;
      }
    });
    // append new field
    if (filledFields === fieldNo) {
      this.sampleReferences.push(['', '', '']);
      this.sampleReferenceAutocomplete.push([]);
    }
    // remove if two end fields are empty
    if (fieldNo > 1 && this.sampleReferences[fieldNo - 1][0] === '' && this.sampleReferences[fieldNo - 2][0] === '') {
      this.sampleReferences.pop();
      this.sampleReferenceAutocomplete.pop();
    }
    this.sampleReferenceIdFind(value);
  }

  sampleReferenceList(value) {
    return new Observable(observer => {
      this.api.get<{_id: string, number: string}[]>('/samples?status=all&page-size=25&sort=number-asc&fields[]=number&fields[]=_id&filters[]=%7B%22mode%22%3A%22stringin%22%2C%22field%22%3A%22number%22%2C%22values%22%3A%5B%22' + value + '%22%5D%7D', data => {
        console.log(data);
        this.sampleReferenceAutocomplete[this.currentSRIndex] = data.map(e => e.number);
        this.sampleReferenceFinds = data;
        observer.next(data.map(e => e.number));
        observer.complete();
        this.sampleReferenceIdFind(value);
      });
    });
  }

  sampleReferenceIdFind(value) {
    const idFind = this.sampleReferenceFinds.find(e => e.number === value);
    if (idFind) {
      this.sampleReferences[this.currentSRIndex][2] = idFind._id;
    }
    else {
      this.sampleReferences[this.currentSRIndex][2] = '';
    }
  }

  sampleReferenceListBind() {
    return this.sampleReferenceList.bind(this);
  }

  uniqueCfValues(index) {  // returns all names until index for unique check
    return this.customFields.slice(0, index).map(e => e[0]);
  }
}



// 1. ngAfterViewInit wird ja jedes mal nach einem ngOnChanges aufgerufen, also zB wenn sich dein ngFor aufbaut. Du könntest also in der Methode prüfen, ob die Daten schon da sind und dann dementsprechend handeln. Das wäre die Eleganteste Variante
// 2. Der state "dirty" soll eigentlich anzeigen, wenn ein Form-Field vom User geändert wurde; damit missbrauchst du es hier etwas
// 3. Die Dirty-Variante: Pack in deine ngFor ein {{ onFirstLoad(data) }} rein, das einfach ausgeführt wird. müsstest dann natürlich abfangen, dass das nicht nach jedem view-cycle neu getriggert wird. Schön ist das nicht, aber besser als mit Timeouts^^