/**
@license
Copyright (c) 2024 trading_peter
This program is available under Apache License Version 2.0
*/

import '@tp/tp-input/tp-input.js';
import { LitElement, html, css, svg } from 'lit';
import { FormElement } from '@tp/helpers/form-element.js';
import { EventHelpers } from '@tp/helpers/event-helpers.js';
import { DomQuery } from '@tp/helpers/dom-query.js';
import { closest } from '@tp/helpers/closest.js'

class TpNumberInput extends FormElement(EventHelpers(DomQuery(LitElement))) {
  static get styles() {
    return [
      css`
        :host {
          display: block;
        }

        tp-input input {
          text-align: center;
        }

        div[slot="prefix"],
        div[slot="suffix"] {
          display: flex;
          flex-direction: row;
          align-items: center;
          cursor: pointer;
          -webkit-user-select: none;
          -moz-user-select: none;
          -ms-user-select: none;
          user-select: none;
        }

        div[slot="prefix"] > tp-icon,
        div[slot="suffix"] > tp-icon {
          display: inline;
          --tp-icon-width: var(--tp-number-input-icon-width, 17px);
          --tp-icon-height: var(--tp-number-input-icon-height, 17px);
        }
      `
    ];
  }

  render() {
    const { disabled, invalid, errorMessage, required, autofocus, _internValue } = this;

    return html`
      <tp-input id="input" exportparts="wrap" .disabled=${disabled} .invalid=${invalid} .value=${_internValue} .autofocus=${autofocus} .errorMessage=${errorMessage} .required=${required}>
        <div slot="prefix">
          <tp-icon id="sub" part="icons" .icon=${this.decreaseIcon || TpNumberInput.defaultDecreaseIcon} .tooltip=${this.decreaseTooltip}></tp-icon>
        </div>
        <input id="innerInput" type="text" pattern="[0-9\\.,]+">
        <div slot="suffix">
          <tp-icon id="add" part="icons" .icon=${this.increaseIcon || TpNumberInput.defaultIncreaseIcon} .tooltip=${this.increaseTooltip}></tp-icon>
        </div>
      </tp-input>
    `;
  }

  static get properties() {
    return {
      disabled: { type: Boolean },
      invalid: { type: Boolean },
      errorMessage: { type: String },
      required: { type: Boolean },
      autofocus: { type: Boolean },
      step: { type: Number },
      value: { type: String },
      min: { type: Number },
      max: { type: Number },
      increaseIcon: { type: Object },
      decreaseIcon: { type: Object },
      increaseTooltip: { type: String },
      decreaseTooltip: { type: String },

      // Calculation speed after medium long press time.
      fastInterval: { type: Number },

      // Calculation speed after really long press on one of the buttons.
      superFastInterval: { type: Number },

      // String to add after the number. Use this to show a unit for example.
      // `13` becomes `13px` for example.
      suffix: { type: String },

      // If true don't include the suffix in the `value` property.
      ignoreSuffix: { type: Boolean },

      // Value to set if the input is NaN or user tries to go under `min`.
      // Useful if you need to support something like `0px` -> `user tabs decrease` -> `inherit` for example.
      specialMin: { type: String },

      // If true the controls allows to switch through time in intervals defined by step.
      // Most other settings are ignore if the control is in this mode.
      timeMode: { type: Boolean },

      _internValue: { type: String }
    };
  }

  static get defaultIncreaseIcon() {
    return svg`<path fill="var(--tp-icon-color)" d="M19 3H5c-1.11 0-2 .9-2 2v14c0 1.1.89 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2zm-2 10h-4v4h-2v-4H7v-2h4V7h2v4h4v2z"></path>`;
  }

  static get defaultDecreaseIcon() {
    return svg`<path fill="var(--tp-icon-color)" d="M19 3H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2zm-2 10H7v-2h10v2z"></path>`;
  }

  constructor() {
    super();
    this._internValue = '0';
    this.value = '0';
    this.step = 1;
    this.min = Number.MIN_SAFE_INTEGER;
    this.max = Number.MAX_SAFE_INTEGER;
    this.fastInterval = 50;
    this.superFastInterval = 100;
  }

  firstUpdated() {
    super.firstUpdated();

    this.listen(this, 'click', '_onTap');
    this.listen(this.$.innerInput, 'blur', '_onBlur');
    this.listen(this.$.innerInput, 'keydown', '_onKey');
  }

  updated(changes) {
    super.updated();

    if (changes.has('timeMode')) {
      this._timeModeChanged();
    }

    if (changes.has('value') || changes.has('min') || changes.has('max') || changes.has('suffix') || changes.has('ignoreSuffix') || changes.has('timeMode')) {
      this._updateValue(this.value);
    }
  }

  _timeModeChanged() {
    if (this.timeMode) {
      this.unlisten(this, 'mousedown', '_onMouseDown');
    } else {
      this.listen(this, 'mousedown', '_onMouseDown');
    }
  }

  _onTap(e) {
    let val = parseInt(this.value, 10) || 0;
    const op = this._getOperation(e);

    if(!op) {
      return;
    }

    if(this.timeMode) {
      val = this._calcTime(op);
    } else {
      if(op === 'add') {
        val = Math.max(val + this.step, this.min);
      } else {
        val -= this.step;
      }
    }

    this._updateValue(val);
  }

  _calcTime(op) {
    const parts = this.value.split(':');
    if(parts.length)
      if(op === 'add') {
      this._updateTime(this.step);
    } else {
      this._updateTime(-this.step);
    }
  }

  _timeValueChanged(value) {
    if(!this.timeMode) return;
    const parts = this._parseTime(value);
    const h = parts[0];
    const m = parts[1];
    this.value = this._prefix(h) + ':' + this._prefix(m);

    this.$.input.value = this.value;
  }

  _parseTime(value) {
    if(!/[0-9]{1,2}:[0-9]{1,2}/.test(value)) {
      value = '00:00';
    }

    const parts = value.split(':');
    let h = parts[0];
    let m = parts[1];
    h = parseInt(h, 10) % 24;
    m = parseInt(m, 10) % 59;
    return [h, m];
  }

  _updateTime(amount) {
    const parts = this._parseTime(this.$.input.value);
    let h = parts[0];
    let m = parts[1];

    // if (amount > 0) {
    // 1. Calculate how many hours were made full.
    const addHours = Math.floor((m + amount) / 60);

    // 2. Calculate the rest of the minutes after we added to hours.
    const minuteRest = m + amount - 60 * addHours;

    h += addHours;

    if(h < 0) {
      h += 24;
    }

    // 3. Update the time.
    this.value = h + ':' + minuteRest;
  }

  _prefix(val) {
    val = val.toString();
    if(val.length === 1) {
      return '0' + val;
    } else {
      return val;
    }
  }

  _onMouseDown(e) {
    this.unlisten(window, 'mouseup', '_onMouseUp');
    this.listen(window, 'mouseup', '_onMouseUp');
    const op = this._getOperation(e);

    this._asyncJob = setTimeout(() => {
      let val = parseInt(this.value, 10) || 0;

      const func = function () {
        if (op == 'add') {
          val += this.step;
        } else {
          val -= this.step;
        }

        this._updateValue(val);
      }.bind(this);

      this._timer = setInterval(func, this.slowInterval);

      // Speed up the interval.
      this._speedUpJob = setTimeout(() => {
        clearInterval(this._timer);
        this._timer = null;
        this._timer = setInterval(func, this.fastInterval);
      }, 2000);

      // Switch to super fast interval.
      this._superSpeedUpJob = setTimeout(() => {
        clearInterval(this._timer);
        this._timer = null;
        this._timer = setInterval(func, this.superFastInterval);
      }, 5000);
    }, 500);
  }

  _onMouseUp(e) {
    this.unlisten(window, 'mouseup', '_onMouseUp');
    clearTimeout(this._asyncJob);
    clearTimeout(this._speedUpJob);
    clearTimeout(this._superSpeedUpJob);
    clearInterval(this._timer);
    this._speedUpJob = null;
    this._superSpeedUpJob = null;
    this._asyncJob = null;
    this._timer = null;
  }

  _onBlur() {
    if(this.timeMode) {
      this._timeValueChanged(this.$.input.value);
    } else {
      this._updateValue(parseInt(this.$.input.value, 10));
    }
  }

  _onKey(e) {
    if(e.keyCode === 13) {
      this._updateValue(parseInt(this.$.input.value, 10));
    }
  }

  _getOperation(e) {
    const btn = e.composedPath()[0];

    if(closest(btn, '#sub', true)) {
      return 'sub';
    } else if(closest(btn, '#add', true)) {
      return 'add';
    }
  }

  _internValueChanged(val) {
    if(val === '') return;

    if(this.timeMode) {
      this._timeValueChanged(val);
    } else {
      this._updateValue(val);
    }
  }

  _updateValue(val) {
    if(this.timeMode) return;

    if(typeof this.specialMin === 'string' && val === this.specialMin) {
      this.value = this.specialMin;
      this.$.input.value = this.value;
      return;
    }

    val = parseInt(val, 10);

    // If val is NaN and an specialMin is defined, then set it.
    // Else set the min value.
    if(isNaN(val)) {
      val = typeof this.specialMin === 'string' ? this.specialMin : this.min;
    }

    if((typeof this.specialMin === 'string' && val === this.specialMin) || (val < this.min && typeof this.specialMin === 'string')) {
      this.value = this.specialMin;
      this.$.input.value = this.value;
      return;
    }

    val = Math.min(this.max, val);
    val = Math.max(this.min, val);
    this.value = this.ignoreSuffix ? val : (!!this.suffix ? val + this.suffix : val);
    this.$.input.value = !!this.suffix ? val + this.suffix : val;
  }
}

window.customElements.define('tp-number-input', TpNumberInput);