const styles = `
  :host,
  :root {
    --default-font-family: 'Open Sans';
    --default-font-family: normal;
    --default-font-color: var(--color-grey-900);
    --default-font-weight: 400;
    --color-white: #fff;
    --color-black: #000;
    --color-grey-900: #353B48;
    --color-grey-500: #656D78;
    --color-grey-200: #E6E9ED;
    --color-grey-100: #F5F7FA;
    --color-blue-900: #124E8F;
    --color-blue-500: #2286E6;
    --color-blue-200: #A6CEF5;
    --color-blue-100: #E8F3FD;
    --theme-palette-primary-light: var(--color-blue-100);
    --theme-palette-paper-background: var(--color-white);
    --theme-palette-divider: var(--color-grey-100);
    --theme-palette-border: var(--color-grey-100);
    --theme-palette-border-hover: var(--color-grey-200);
    --border-radius-size: 5px;
    --border-width: 1px;
    --button-border-radius: var(--border-radius-size);
    --button-border-stroke:var(--border-width);
    --button-background-color: var(--theme-palette-paper-background);
    --button-background-color--hover: var(--color-grey-100);
    --button-border-color: var(--theme-palette-border);
    --button-border-color--hover: var(--theme-palette-border-hover);
    --button-border: var(--button-border-stroke) solid var(--button-border-color);
    --button-border--hover: var(--button-border-stroke) solid var(--button-border-color--hover);
    --button-title-color: var(--color-grey-900);
    --button-description-color: var(--color-grey-500);
    --button-title-font-size: 16px;
    --button-description-font-size: var(--color-grey-500);
    --button-title-font-size: var(--color-grey-900);
    --button-description-font-size: var(--color-grey-500);
    font-family: var(--default-font-family);
    font-size: var(--default-font-size);
    color: var(--default-font-color);
    line-height: var(--default-line-height);
  }
  .button {
    box-sizing: border-box;
    display: flex;
    flex: none;
    order: 0;
    align-self: stretch;
    flex-grow: 0;
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 16px;
    width: 213.5px;
    height: 64px;
    background-color: var(--button-background-color);
    border: var(--button-border);
    border-radius: var(--button-border-radius);
    transition: background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms, box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms, border 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;
    text-decoration: none !important;
  }
  .button:hover, .button:active, .button:focus {
    background-color: var(--button-background-color--hover);
    border: var(--button-border--hover);
  }
  .button__content {
    display: flex;
    align-items: flex-start;
  }
  .button__content .icon {
    height: 28px;
    width: 28px;
  }
  .button__title {
    font-family: 'Open Sans';
    font-size: var(--button-title-font-size);
    line-height: 22px;
    letter-spacing: 0.15px;
    color: var(--button-title-color);
  }
  .button__description {
    font-family: 'Open Sans';
    font-size: 12px;
    line-height: 18px;
    letter-spacing: 0.2px;
    color: var(--button-description-color);
  }
`;

export class Button extends HTMLElement {
  constructor () {
    super();

    const shadow = this.attachShadow({ mode: 'open' });
    const href = this.getAttribute('href');
    const title = this.getAttribute('title');
    const description = this.getAttribute('description');
    const icon = this.getAttribute('icon') || null;

    shadow.innerHTML = `
      <style>${styles}</style>
      <a
        href="${href}"
        class="button"
        target="_blank"
      >
        <div class="button__content">
          <div class="icon">
            ${icon ? `<kabinet-icon icon='${icon}'></kabinet-icon>` : null}
          </div>
          <div class="button__heading">
            <div class="button__title">
              ${title}
            </div>
            <div class="button__description">
              ${description}
            </div>
          </div>
        </div>
      </a>
    `;
  }
}

export default Button;