///
/// Copyright © 2016-2024 The Thingsboard Authors
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
///     http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///

import { Component, EventEmitter, forwardRef, Input, OnInit, Output } from '@angular/core';
import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
import { TimeService } from '@core/services/time.service';
import { coerceNumberProperty } from '@angular/cdk/coercion';
import { SubscriptSizing } from '@angular/material/form-field';
import { coerceBoolean } from '@shared/decorators/coercion';
import { Interval, IntervalMath, TimeInterval } from '@shared/models/time/time.models';
import { isDefined } from '@core/utils';

@Component({
  selector: 'tb-timeinterval',
  templateUrl: './timeinterval.component.html',
  styleUrls: ['./timeinterval.component.scss'],
  providers: [
    {
      provide: NG_VALUE_ACCESSOR,
      useExisting: forwardRef(() => TimeintervalComponent),
      multi: true
    }
  ]
})
export class TimeintervalComponent implements OnInit, ControlValueAccessor {

  minValue: number;
  maxValue: number;

  @Input()
  set min(min: number) {
    const minValueData = coerceNumberProperty(min);
    if (typeof minValueData !== 'undefined' && minValueData !== this.minValue) {
      this.minValue = minValueData;
      this.maxValue = Math.max(this.maxValue, this.minValue);
      this.updateView();
    }
  }

  @Input()
  set max(max: number) {
    const maxValueData = coerceNumberProperty(max);
    if (typeof maxValueData !== 'undefined' && maxValueData !== this.maxValue) {
      this.maxValue = maxValueData;
      this.minValue = Math.min(this.minValue, this.maxValue);
      this.updateView(true);
    }
  }

  @Input() predefinedName: string;

  @Input()
  @coerceBoolean()
  isEdit = false;

  @Input()
  @coerceBoolean()
  hideFlag = false;

  @Input()
  @coerceBoolean()
  disabledAdvanced = false;

  @Input()
  @coerceBoolean()
  useCalendarIntervals = false;

  @Output() hideFlagChange = new EventEmitter<boolean>();

  @Input() disabled: boolean;

  @Input()
  subscriptSizing: SubscriptSizing = 'fixed';

  days = 0;
  hours = 0;
  mins = 1;
  secs = 0;

  interval: Interval = 0;
  intervals: Array<TimeInterval>;

  advanced = false;

  private modelValue: Interval;
  private rendered = false;
  private propagateChangeValue: any;

  private propagateChange = (value: any) => {
    this.propagateChangeValue = value;
  };

  constructor(private timeService: TimeService) {
  }

  ngOnInit(): void {
    this.boundInterval();
  }

  registerOnChange(fn: any): void {
    this.propagateChange = fn;
    if (isDefined(this.propagateChangeValue)) {
      this.propagateChange(this.propagateChangeValue);
    }
  }

  registerOnTouched(fn: any): void {
  }

  setDisabledState(isDisabled: boolean): void {
    this.disabled = isDisabled;
  }

  writeValue(interval: Interval): void {
    this.modelValue = interval;
    this.rendered = true;
    if (typeof this.modelValue !== 'undefined') {
      const min = this.timeService.boundMinInterval(this.minValue);
      const max = this.timeService.boundMaxInterval(this.maxValue);
      if (IntervalMath.numberValue(this.modelValue) >= min && IntervalMath.numberValue(this.modelValue) <= max) {
        this.advanced = !this.timeService.matchesExistingInterval(this.minValue, this.maxValue, this.modelValue, this.useCalendarIntervals);
        this.setInterval(this.modelValue);
      } else {
        this.boundInterval();
      }
    }
  }

  private setInterval(interval: Interval) {
    if (!this.advanced) {
      this.interval = interval;
    }
    const intervalSeconds = Math.floor(IntervalMath.numberValue(interval) / 1000);
    this.days = Math.floor(intervalSeconds / 86400);
    this.hours = Math.floor((intervalSeconds % 86400) / 3600);
    this.mins = Math.floor(((intervalSeconds % 86400) % 3600) / 60);
    this.secs = intervalSeconds % 60;
  }

  private boundInterval(updateToPreferred = false) {
    const min = this.timeService.boundMinInterval(this.minValue);
    const max = this.timeService.boundMaxInterval(this.maxValue);
    this.intervals = this.timeService.getIntervals(this.minValue, this.maxValue, this.useCalendarIntervals);
    if (this.rendered) {
      let newInterval = this.modelValue;
      const newIntervalMs = IntervalMath.numberValue(newInterval);
      if (newIntervalMs < min) {
        newInterval = min;
      } else if (newIntervalMs >= max && updateToPreferred) {
        newInterval = this.timeService.boundMaxInterval(max / 7);
      }
      if (!this.advanced) {
        newInterval = this.timeService.boundToPredefinedInterval(min, max, newInterval, this.useCalendarIntervals);
      }
      if (newInterval !== this.modelValue) {
        this.setInterval(newInterval);
        this.updateView();
      }
    }
  }

  private updateView(updateToPreferred = false) {
    if (!this.rendered) {
      return;
    }
    let value: Interval = null;
    let interval: Interval;
    if (!this.advanced) {
      interval = this.interval;
      if (!interval || typeof interval === 'number' && isNaN(interval)) {
        interval = this.calculateIntervalMs();
      }
    } else {
      interval = this.calculateIntervalMs();
    }
    if (typeof interval === 'string' || !isNaN(interval) && interval > 0) {
      value = interval;
    }
    this.modelValue = value;
    this.propagateChange(this.modelValue);
    this.boundInterval(updateToPreferred);
  }

  private calculateIntervalMs(): number {
    return (this.days * 86400 +
      this.hours * 3600 +
      this.mins * 60 +
      this.secs) * 1000;
  }

  onIntervalChange() {
    this.updateView();
  }

  onAdvancedChange() {
    if (!this.advanced) {
      this.interval = this.calculateIntervalMs();
    } else {
      let interval = this.interval;
      if (!interval || typeof interval === 'number' && isNaN(interval)) {
        interval = this.calculateIntervalMs();
      }
      this.setInterval(interval);
    }
    this.updateView();
  }

  onHideFlagChange() {
    this.hideFlagChange.emit(this.hideFlag);
  }

  onTimeInputChange(type: string) {
    switch (type) {
      case 'secs':
        setTimeout(() => this.onSecsChange(), 0);
        break;
      case 'mins':
        setTimeout(() => this.onMinsChange(), 0);
        break;
      case 'hours':
        setTimeout(() => this.onHoursChange(), 0);
        break;
      case 'days':
        setTimeout(() => this.onDaysChange(), 0);
        break;
    }
  }

  private onSecsChange() {
    if (typeof this.secs === 'undefined') {
      return;
    }
    if (this.secs < 0) {
      if ((this.days + this.hours + this.mins) > 0) {
        this.secs = this.secs + 60;
        this.mins--;
        this.onMinsChange();
      } else {
        this.secs = 0;
      }
    } else if (this.secs >= 60) {
      this.secs = this.secs - 60;
      this.mins++;
      this.onMinsChange();
    }
    this.updateView();
  }

  private onMinsChange() {
    if (typeof this.mins === 'undefined') {
      return;
    }
    if (this.mins < 0) {
      if ((this.days + this.hours) > 0) {
        this.mins = this.mins + 60;
        this.hours--;
        this.onHoursChange();
      } else {
        this.mins = 0;
      }
    } else if (this.mins >= 60) {
      this.mins = this.mins - 60;
      this.hours++;
      this.onHoursChange();
    }
    this.updateView();
  }

  private onHoursChange() {
    if (typeof this.hours === 'undefined') {
      return;
    }
    if (this.hours < 0) {
      if (this.days > 0) {
        this.hours = this.hours + 24;
        this.days--;
        this.onDaysChange();
      } else {
        this.hours = 0;
      }
    } else if (this.hours >= 24) {
      this.hours = this.hours - 24;
      this.days++;
      this.onDaysChange();
    }
    this.updateView();
  }

  private onDaysChange() {
    if (typeof this.days === 'undefined') {
      return;
    }
    if (this.days < 0) {
      this.days = 0;
    }
    this.updateView();
  }

}