// import { $_ } from '../utils.js';
// const themeToggle = $_('button#theme-toggle');
// if (themeToggle) {
//   const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)');
//   let theme = localStorage.getItem('theme') || 'light';
//   const setTheme = (mode: 'light' | 'dark') => {
//     document.documentElement.setAttribute('data-theme', mode);
//     document.body.classList.remove(`sl-theme-light`);
//     document.body.classList.remove(`sl-theme-dark`);
//     document.body.classList.add(`sl-theme-${mode}`);
//     localStorage.setItem('theme', mode);
//     theme = mode;
//     themeToggle.classList.remove('light', 'dark');
//     themeToggle.classList.add(mode);
//     themeToggle.title = `Switch between dark and light mode (currently ${mode} mode)`;
//     themeToggle.setAttribute('aria-label', `Switch between dark and light mode (currently ${mode} mode)`);
//   }
//   setTheme(theme === 'dark' || (!theme && prefersDarkScheme.matches) ? 'dark' : 'light');

//   themeToggle.addEventListener('click', () => {
//     setTheme(theme === 'dark' ? 'light' : 'dark');
//   });
// };
import {
  LitElement,
  css,
  html
} from 'lit';
import { Ref, createRef, ref } from 'lit/directives/ref.js';
// import { styleMap } from 'lit/directives/style-map.js';
import {
  query,
  state,
} from 'lit/decorators.js';
import { classMap } from 'lit-html/directives/class-map.js';

export const TAG_NAME = 'theme-toggle';

export class ThemeToggle extends LitElement {
  // Define scoped styles right with your component, in plain CSS
  static styles = css`
  button {
    cursor: pointer;
    background: none;
    border: none;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  svg {
    &:hover {
      color: var(--color-accent);
    }
  }
  .dark {
    #sun {
      display: none;
    }
  }
  .light {
    #moon {
      display: none;
    }
  }
  `;

  static readonly metadata = {
    version: '0.1.0',
    tag: TAG_NAME,
  };

  @state()
  protected theme: string;

  constructor() {
    super();
    const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)');
    this.theme = localStorage.getItem('theme') || 'light';
    this.setTheme(this.theme === 'dark' || (!this.theme && prefersDarkScheme.matches) ? 'dark' : 'light');
  }

  setTheme = (mode: 'light' | 'dark') => {
    document.documentElement.setAttribute('data-theme', mode);
    document.body.classList.remove(`sl-theme-light`);
    document.body.classList.remove(`sl-theme-dark`);
    document.body.classList.add(`sl-theme-${mode}`);
    localStorage.setItem('theme', mode);
    this.theme = mode;
  }

  click = () => {
    const theme = document.documentElement.getAttribute('data-theme');
    this.setTheme(theme === 'dark' ? 'light' : 'dark');
  }

  protected render() {
    return html`
      <button 
        title="Switch between dark and light mode (currently ${this.theme} mode)" 
        aria-label="Switch between dark and light mode (currently ${this.theme} mode)" 
        aria-live="polite"
        class=${classMap({ [this.theme]: true })}
        @click=${this.click}
      >
        <svg id="sun" viewBox="0 0 24 24" width="24" height="24"><path fill="currentColor" d="M12,9c1.65,0,3,1.35,3,3s-1.35,3-3,3s-3-1.35-3-3S10.35,9,12,9 M12,7c-2.76,0-5,2.24-5,5s2.24,5,5,5s5-2.24,5-5 S14.76,7,12,7L12,7z M2,13l2,0c0.55,0,1-0.45,1-1s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S1.45,13,2,13z M20,13l2,0c0.55,0,1-0.45,1-1 s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S19.45,13,20,13z M11,2v2c0,0.55,0.45,1,1,1s1-0.45,1-1V2c0-0.55-0.45-1-1-1S11,1.45,11,2z M11,20v2c0,0.55,0.45,1,1,1s1-0.45,1-1v-2c0-0.55-0.45-1-1-1C11.45,19,11,19.45,11,20z M5.99,4.58c-0.39-0.39-1.03-0.39-1.41,0 c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0s0.39-1.03,0-1.41L5.99,4.58z M18.36,16.95 c-0.39-0.39-1.03-0.39-1.41,0c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0c0.39-0.39,0.39-1.03,0-1.41 L18.36,16.95z M19.42,5.99c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06c-0.39,0.39-0.39,1.03,0,1.41 s1.03,0.39,1.41,0L19.42,5.99z M7.05,18.36c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06 c-0.39,0.39-0.39,1.03,0,1.41s1.03,0.39,1.41,0L7.05,18.36z"></path></svg>
        <svg id="moon" viewBox="0 0 24 24" width="24" height="24"><path fill="currentColor" d="M9.37,5.51C9.19,6.15,9.1,6.82,9.1,7.5c0,4.08,3.32,7.4,7.4,7.4c0.68,0,1.35-0.09,1.99-0.27C17.45,17.19,14.93,19,12,19 c-3.86,0-7-3.14-7-7C5,9.07,6.81,6.55,9.37,5.51z M12,3c-4.97,0-9,4.03-9,9s4.03,9,9,9s9-4.03,9-9c0-0.46-0.04-0.92-0.1-1.36 c-0.98,1.37-2.58,2.26-4.4,2.26c-2.98,0-5.4-2.42-5.4-5.4c0-1.81,0.89-3.42,2.26-4.4C12.92,3.04,12.46,3,12,3L12,3z"></path></svg>
      </button>
    `;
  }
}