/**
@license
Copyright (c) 2022 trading_peter
This program is available under Apache License Version 2.0
*/

import './tp-toast.js';
import '@tp/helpers/debounce.js';
import '@tp/tp-icon/tp-icon.js';
import '@tp/tp-media-query/tp-media-query.js';
import { debounce } from '@tp/helpers/debounce.js';
import { closest } from '@tp/helpers/closest.js';
import { EventHelpers } from '@tp/helpers/event-helpers.js';
import { LitElement, html, css, svg } from 'lit';

export default class TpToaster extends EventHelpers(LitElement) {
  static get styles() {
    return [
      css`
        :host {
          display: inline-block;
          position: fixed;
          top: 15px;
          left: 50%;
          width: 50%;
          z-index: 1009;
          transform: translateY(-60px);
        }

        :host [hidden] {
          display: none;
        }

        #infos {
          display: inline-block;
          font-size: 0.7em;
          border-radius: 4px;
          background: #FAFAFA;
          transition: transform 0.3s;
          will-change: transform;
          box-shadow: 0 3px 4px 0 rgba(0, 0, 0, 0.14),
                    0 1px 8px 0 rgba(0, 0, 0, 0.12),
                    0 3px 3px -2px rgba(0, 0, 0, 0.4);
        }

        #infos .info-wrap {
          display: flex;
          flex-direction: row;
          align-items: center;
        }

        #infos[show-infos] {
          transform: translateY(60px);
        }

        #infos .info-wrap tp-icon {
          padding: 5px;
          --tp-icon-width: 18px;
          --tp-icon-height: 18px;
        }

        #infos .info-wrap > div {
          padding: 0 5px;
        }

        #wrap {
          transition: transform 0.3s;
          will-change: transform;
          transform: translateY(30px);
        }

        #wrap[show-infos] {
          transform: translateY(70px);
        }

        :host ::slotted(tp-toast) {
          position: absolute;
        }

        @media all and (min-width: 0) and (max-width: 480px) {
          :host {
            left: 2%;
            width: 96%
          }
        }
      `
    ];
  }

  render() {
    const { hiddenCount, dismissLabel, moreLabel } = this;

    const show = this.toasts.length > 1;

    return html`
      <tp-media-query @media-query-update=${this.queryMatchChanged}></tp-media-query>

      <div id="infos" ?show-infos=${show}>
        <div class="info-wrap">
          <tp-icon .icon=${TpToaster.clearAllIcon} @click=${this.dismissAll}>${dismissLabel}</tp-icon>
          <div ?hidden=${hiddenCount === 0}><span>${hiddenCount}</span> <span>${moreLabel}</span></div>
        </div>
      </div>
      <div id="wrap" ?show-infos=${show}>
        <slot></slot>
      </div>
    `;
  }

  static get properties() {
    return {
      maxVisible: { type: Number },
      count: { type: Number },
      hiddenCount: { type: Number },
      dismissLabel: { type: String },
      moreLabel: { type: String },
    };
  }

  constructor() {
    super();
    this.updateList = debounce(this.updateList.bind(this), 50);
    window.TpToaster = this;
    this.moreLabel = 'more';
    this.hiddenCount = 0;
    this.maxVisible = 4;
  }

  static get clearAllIcon() {
    return svg`<path fill="var(--tp-toaster-icon-color, #000000)" d="M5,13H19V11H5M3,17H17V15H3M7,7V9H21V7" />`;
  }

  get toasts() {
    const slot = this.shadowRoot.querySelector('slot');

    if (!slot) return [];

    return slot
      .assignedNodes({ flatten:true })
      .filter(n => n.nodeType === Node.ELEMENT_NODE);
  }

  connectedCallback() {
    super.connectedCallback();

    this.listen(this, 'click', 'onClick');
    this.listen(this, 'toast-dismissed', 'onToastDismissed');
  }

  /**
   * Adds a new toast. This can be a `tp-toast` element or a object with the properties:
   * ```json
   * {
   *   "content": "The message to display",
   *   "type": "warning",
   *   "delay": "5000"
   * }
   * ```
   * If the value of `content` starts with `i18n.`, the toaster tries to translate the string.
   *
   * @param toast
   */
  add(toast) {
    toast = Object.assign({
      content: '',
      type: 'info',
      delay: 5000
    }, toast);

    const newContent = document.createElement('div');
    newContent.textContent = toast.content;

    const newToast = document.createElement('tp-toast');
    newToast.type = toast.type;
    newToast.delay = toast.delay;
    newToast.sticky = toast.sticky;
    newToast.icon = toast.icon;
    newToast.appendChild(newContent);

    this.appendChild(newToast);
    this.updateList();
  }

  /**
   * Dismiss all non-sticky toasts.
   */
  dismissAll() {
    this.toasts.forEach(toast => {
      if (!toast.sticky) {
        toast.dismiss();
      }
    });
  }

  /**
   * Dismiss all sticky toasts.
   */
  dismissSticky() {
    this.toasts.forEach(toast => {
      if (toast.sticky) {
        toast.dismiss();
      }
    });
  }

  onClick(e) {
    const target = closest(e.target, 'tp-toast', true);
    if (target && !target.isDismissed) {
      target.parentNode.appendChild(target);
      setTimeout(() => {
        this.updateList();
      }, 50);
    }
  }

  onToastDismissed(e) {
    this.removeChild(e.detail.toast);
    this.updateList();
  }

  updateList() {
    const toasts = this.toasts;
    this.count = toasts.length;

    const hiddenToasts = toasts.slice(0, toasts.length - this.maxVisible);

    for (let i = 0, li = hiddenToasts.length; i < li; ++i) {
      hiddenToasts[i].translateY = -150;
      hiddenToasts[i].stopDelay();
    }

    const visibleToasts = toasts.slice(Math.max(0, toasts.length - this.maxVisible));

    for (let i = 0, li = visibleToasts.length; i < li; ++i) {
      visibleToasts[i].translateY = 30 * i;

      if (i === li - 1) {
        visibleToasts[i].activateDelay();
      } else {
        visibleToasts[i].stopDelay();
      }
    }

    this.hiddenCount = Math.max(0, this.count - this.maxVisible);
  }

  shouldShowMoreLabel(hiddenCount) {
    return hiddenCount > 0;
  }

  queryMatchChanged(e) {
    this.maxVisible = e.detail.value ? 1 : 4;
    if (this.isConnected) {
      this.updateList();
    }
  }
}

window.customElements.define('tp-toaster', TpToaster);