(function (global, factory) {
  const LayerClass = factory();
  // Allow usage as `Layer({...})` or `new Layer()`
  // But Layer is a class. We can wrap it in a proxy or factory function.
  
  function LayerFactory(options) {
     if (options && typeof options === 'object') {
         return LayerClass.$(options);
     }
     return new LayerClass();
  }
  
  // Copy static methods
  Object.assign(LayerFactory, LayerClass);
  // Also copy prototype for instanceof checks if needed (though tricky with factory)
  LayerFactory.prototype = LayerClass.prototype;
  
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = LayerFactory :
    typeof define === 'function' && define.amd ? define(() => LayerFactory) :
      (global.Layer = LayerFactory);
}(this, (function () {
  'use strict';

  const PREFIX = 'layer-';
  
  // Theme & Styles
  const css = `
    .${PREFIX}overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.4);
      display: flex;
      justify-content: center;
      align-items: center;
      z-index: 1000;
      opacity: 0;
      transition: opacity 0.3s;
    }
    .${PREFIX}overlay.show {
      opacity: 1;
    }
    .${PREFIX}popup {
      background: #fff;
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      width: 32em;
      max-width: 90%;
      padding: 1.5em;
      display: flex;
      flex-direction: column;
      align-items: center;
      transform: scale(0.92);
      transition: transform 0.26s ease;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }
    .${PREFIX}overlay.show .${PREFIX}popup {
      transform: scale(1);
    }
    .${PREFIX}title {
      font-size: 1.8em;
      font-weight: 600;
      color: #333;
      margin: 0 0 0.5em;
      text-align: center;
    }
    .${PREFIX}content {
      font-size: 1.125em;
      color: #545454;
      margin-bottom: 1.5em;
      text-align: center;
      line-height: 1.5;
    }
    .${PREFIX}actions {
      display: flex;
      justify-content: center;
      gap: 1em;
      width: 100%;
    }
    .${PREFIX}button {
      border: none;
      border-radius: 4px;
      padding: 0.6em 1.2em;
      font-size: 1em;
      cursor: pointer;
      transition: background-color 0.2s, box-shadow 0.2s;
      color: #fff;
    }
    .${PREFIX}confirm {
      background-color: #3085d6;
    }
    .${PREFIX}confirm:hover {
      background-color: #2b77c0;
    }
    .${PREFIX}cancel {
      background-color: #aaa;
    }
    .${PREFIX}cancel:hover {
      background-color: #999;
    }
    .${PREFIX}icon {
      width: 5em;
      height: 5em;
      margin: 1.5em auto 1.2em;
      position: relative;
      display: grid;
      place-items: center;
    }

    /* SVG Icon (SweetAlert-like, animated via xjs.draw + spring) */
    .${PREFIX}icon svg {
      width: 100%;
      height: 100%;
      display: block;
      overflow: visible;
    }
    .${PREFIX}svg-ring,
    .${PREFIX}svg-mark {
      fill: none;
      stroke-linecap: round;
      stroke-linejoin: round;
    }
    .${PREFIX}svg-ring {
      stroke-width: 4.5;
      opacity: 0.95;
    }
    .${PREFIX}svg-mark {
      stroke-width: 6;
    }
    .${PREFIX}svg-dot {
      transform-box: fill-box;
      transform-origin: center;
    }

    .${PREFIX}icon.success { color: #a5dc86; }
    .${PREFIX}icon.error { color: #f27474; }
    .${PREFIX}icon.warning { color: #f8bb86; }
    .${PREFIX}icon.info { color: #3fc3ee; }
  `;

  // Inject Styles
  const injectStyles = () => {
    if (document.getElementById(`${PREFIX}styles`)) return;
    const styleSheet = document.createElement('style');
    styleSheet.id = `${PREFIX}styles`;
    styleSheet.textContent = css;
    document.head.appendChild(styleSheet);
  };

  class Layer {
    constructor() {
      injectStyles();
      this.params = {};
      this.dom = {};
      this.promise = null;
      this.resolve = null;
      this.reject = null;
      this._onKeydown = null;
    }

    // Constructor helper when called as function: const popup = Layer({...})
    static get isProxy() { return true; }
    
    // Static entry point
    static fire(options) {
      const instance = new Layer();
      return instance._fire(options);
    }
    
    // Chainable entry point (builder-style)
    // Example:
    //   Layer.$({ title: 'Hi' }).fire().then(...)
    //   Layer.$().config({ title: 'Hi' }).fire()
    static $(options) {
      const instance = new Layer();
      if (options !== undefined) instance.config(options);
      return instance;
    }
    
    // Chainable config helper (does not render until `.fire()` is called)
    config(options = {}) {
      // Support the same shorthand as Layer.fire(title, text, icon)
      if (typeof options === 'string') {
        options = { title: options };
        if (arguments[1]) options.text = arguments[1];
        if (arguments[2]) options.icon = arguments[2];
      }
      this.params = { ...(this.params || {}), ...options };
      return this;
    }
    
    // Instance entry point (chainable)
    fire(options) {
      const merged = (options === undefined) ? (this.params || {}) : options;
      return this._fire(merged);
    }

    _fire(options = {}) {
      if (typeof options === 'string') {
        options = { title: options };
        if (arguments[1]) options.text = arguments[1];
        if (arguments[2]) options.icon = arguments[2];
      }

      this.params = {
        title: '',
        text: '',
        icon: null,
        confirmButtonText: 'OK',
        cancelButtonText: 'Cancel',
        showCancelButton: false,
        confirmButtonColor: '#3085d6',
        cancelButtonColor: '#aaa',
        closeOnClickOutside: true,
        closeOnEsc: true,
        iconAnimation: true,
        popupAnimation: true,
        ...options
      };

      this.promise = new Promise((resolve, reject) => {
        this.resolve = resolve;
        this.reject = reject;
      });

      this._render();
      return this.promise;
    }

    static _getXjs() {
      // Prefer xjs, fallback to animal (compat)
      const g = (typeof window !== 'undefined') ? window : (typeof globalThis !== 'undefined' ? globalThis : null);
      if (!g) return null;
      const x = g.xjs || g.animal;
      return (typeof x === 'function') ? x : null;
    }

    _render() {
      // Remove existing if any
      const existing = document.querySelector(`.${PREFIX}overlay`);
      if (existing) existing.remove();

      // Create Overlay
      this.dom.overlay = document.createElement('div');
      this.dom.overlay.className = `${PREFIX}overlay`;

      // Create Popup
      this.dom.popup = document.createElement('div');
      this.dom.popup.className = `${PREFIX}popup`;
      this.dom.overlay.appendChild(this.dom.popup);

      // Icon
      if (this.params.icon) {
        this.dom.icon = this._createIcon(this.params.icon);
        this.dom.popup.appendChild(this.dom.icon);
      }

      // Title
      if (this.params.title) {
        this.dom.title = document.createElement('h2');
        this.dom.title.className = `${PREFIX}title`;
        this.dom.title.textContent = this.params.title;
        this.dom.popup.appendChild(this.dom.title);
      }

      // Content (Text / HTML / Element)
      if (this.params.text || this.params.html || this.params.content) {
        this.dom.content = document.createElement('div');
        this.dom.content.className = `${PREFIX}content`;
        
        if (this.params.content) {
           // DOM Element or Selector
           let el = this.params.content;
           if (typeof el === 'string') el = document.querySelector(el);
           if (el instanceof Element) this.dom.content.appendChild(el); 
        } else if (this.params.html) {
           this.dom.content.innerHTML = this.params.html;
        } else {
           this.dom.content.textContent = this.params.text;
        }
        
        this.dom.popup.appendChild(this.dom.content);
      }

      // Actions
      this.dom.actions = document.createElement('div');
      this.dom.actions.className = `${PREFIX}actions`;
      
      // Cancel Button
      if (this.params.showCancelButton) {
        this.dom.cancelBtn = document.createElement('button');
        this.dom.cancelBtn.className = `${PREFIX}button ${PREFIX}cancel`;
        this.dom.cancelBtn.textContent = this.params.cancelButtonText;
        this.dom.cancelBtn.style.backgroundColor = this.params.cancelButtonColor;
        this.dom.cancelBtn.onclick = () => this._close(false);
        this.dom.actions.appendChild(this.dom.cancelBtn);
      }

      // Confirm Button
      this.dom.confirmBtn = document.createElement('button');
      this.dom.confirmBtn.className = `${PREFIX}button ${PREFIX}confirm`;
      this.dom.confirmBtn.textContent = this.params.confirmButtonText;
      this.dom.confirmBtn.style.backgroundColor = this.params.confirmButtonColor;
      this.dom.confirmBtn.onclick = () => this._close(true);
      this.dom.actions.appendChild(this.dom.confirmBtn);

      this.dom.popup.appendChild(this.dom.actions);

      // Event Listeners
      if (this.params.closeOnClickOutside) {
        this.dom.overlay.addEventListener('click', (e) => {
          if (e.target === this.dom.overlay) {
            this._close(null); // Dismiss
          }
        });
      }

      document.body.appendChild(this.dom.overlay);

      // Animation
      requestAnimationFrame(() => {
        this.dom.overlay.classList.add('show');
        this._didOpen();
      });
    }

    _createIcon(type) {
      const icon = document.createElement('div');
      icon.className = `${PREFIX}icon ${type}`;
      
      const svgNs = 'http://www.w3.org/2000/svg';
      const svg = document.createElementNS(svgNs, 'svg');
      svg.setAttribute('viewBox', '0 0 80 80');
      svg.setAttribute('aria-hidden', 'true');
      svg.setAttribute('focusable', 'false');

      const ring = document.createElementNS(svgNs, 'circle');
      ring.setAttribute('class', `${PREFIX}svg-ring ${PREFIX}svg-draw`);
      ring.setAttribute('cx', '40');
      ring.setAttribute('cy', '40');
      ring.setAttribute('r', '34');
      ring.setAttribute('stroke', 'currentColor');

      svg.appendChild(ring);

      const addPath = (d, extraClass) => {
        const p = document.createElementNS(svgNs, 'path');
        p.setAttribute('d', d);
        p.setAttribute('class', `${PREFIX}svg-mark ${PREFIX}svg-draw${extraClass ? ' ' + extraClass : ''}`);
        p.setAttribute('stroke', 'currentColor');
        svg.appendChild(p);
        return p;
      };

      if (type === 'success') {
        addPath('M23 41 L34.5 53 L58 29', `${PREFIX}svg-success`);
      } else if (type === 'error') {
        addPath('M28 28 L52 52', `${PREFIX}svg-error-left`);
        addPath('M52 28 L28 52', `${PREFIX}svg-error-right`);
      } else if (type === 'warning') {
        addPath('M40 20 L40 46', `${PREFIX}svg-warning-line`);
        const dot = document.createElementNS(svgNs, 'circle');
        dot.setAttribute('class', `${PREFIX}svg-dot`);
        dot.setAttribute('cx', '40');
        dot.setAttribute('cy', '58');
        dot.setAttribute('r', '3.2');
        dot.setAttribute('fill', 'currentColor');
        svg.appendChild(dot);
      } else if (type === 'info') {
        addPath('M40 34 L40 56', `${PREFIX}svg-info-line`);
        const dot = document.createElementNS(svgNs, 'circle');
        dot.setAttribute('class', `${PREFIX}svg-dot`);
        dot.setAttribute('cx', '40');
        dot.setAttribute('cy', '25');
        dot.setAttribute('r', '3.2');
        dot.setAttribute('fill', 'currentColor');
        svg.appendChild(dot);
      } else {
        // Fallback to info-like ring only
      }

      icon.appendChild(svg);
      
      return icon;
    }

    _didOpen() {
      // Keyboard close (ESC)
      if (this.params.closeOnEsc) {
        this._onKeydown = (e) => {
          if (!e) return;
          if (e.key === 'Escape') this._close(null);
        };
        document.addEventListener('keydown', this._onKeydown);
      }

      // Popup animation (optional)
      if (this.params.popupAnimation) {
        const X = Layer._getXjs();
        if (X && this.dom.popup) {
          // Override the CSS scale transition with a spring-ish entrance.
          try {
            this.dom.popup.style.transition = 'none';
            this.dom.popup.style.transform = 'scale(0.92)';
            X(this.dom.popup).animate({
              scale: [0.92, 1],
              y: [-6, 0],
              duration: 520,
              easing: { stiffness: 260, damping: 16 }
            });
          } catch {}
        }
      }

      // Icon SVG draw animation
      if (this.params.iconAnimation) {
        this._animateIcon();
      }

      // User hook (SweetAlert-ish naming)
      try {
        if (typeof this.params.didOpen === 'function') this.params.didOpen(this.dom.popup);
      } catch {}
    }

    _animateIcon() {
      const icon = this.dom.icon;
      if (!icon) return;
      const X = Layer._getXjs();
      if (!X) return;

      try {
        X(icon).animate({
          opacity: [0, 1],
          scale: [0.68, 1],
          duration: 520,
          easing: { stiffness: 240, damping: 14 }
        });
      } catch {}

      const svg = icon.querySelector('svg');
      if (!svg) return;

      const type = (this.params && this.params.icon) || '';
      const ring = svg.querySelector(`.${PREFIX}svg-ring`);
      const marks = Array.from(svg.querySelectorAll(`.${PREFIX}svg-mark`));
      const dot = svg.querySelector(`.${PREFIX}svg-dot`);

      // draw ring first
      try { if (ring) X(ring).draw({ duration: 520, easing: 'ease-in-out', delay: 60 }); } catch {}

      if (type === 'error') {
        // two lines staggered
        const left = marks[0];
        const right = marks[1];
        try { if (left) X(left).draw({ duration: 360, easing: 'ease-out', delay: 180 }); } catch {}
        try { if (right) X(right).draw({ duration: 360, easing: 'ease-out', delay: 250 }); } catch {}
        return;
      }

      // single mark (success/warning/info)
      marks.forEach((m, i) => {
        try { X(m).draw({ duration: 420, easing: 'ease-out', delay: 180 + i * 60 }); } catch {}
      });

      if (dot) {
        try {
          dot.style.opacity = '0';
          X(dot).animate({
            opacity: [0, 1],
            scale: [0.2, 1],
            duration: 320,
            delay: 280,
            easing: { stiffness: 320, damping: 18 }
          });
        } catch {}
      }
    }

    _close(isConfirmed) {
      this.dom.overlay.classList.remove('show');
      setTimeout(() => {
        if (this.dom.overlay && this.dom.overlay.parentNode) {
          this.dom.overlay.parentNode.removeChild(this.dom.overlay);
        }
      }, 300);

      if (this._onKeydown) {
        try { document.removeEventListener('keydown', this._onKeydown); } catch {}
        this._onKeydown = null;
      }

      try {
        if (typeof this.params.willClose === 'function') this.params.willClose(this.dom.popup);
      } catch {}
      try {
        if (typeof this.params.didClose === 'function') this.params.didClose();
      } catch {}

      if (isConfirmed === true) {
        this.resolve({ isConfirmed: true, isDenied: false, isDismissed: false });
      } else if (isConfirmed === false) {
        this.resolve({ isConfirmed: false, isDenied: false, isDismissed: true, dismiss: 'cancel' });
      } else {
        this.resolve({ isConfirmed: false, isDenied: false, isDismissed: true, dismiss: 'backdrop' });
      }
    }
  }

  return Layer;

})));