/**
 * Copyright Aquera Inc 2023
 *
 * This source code is licensed under the BSD-3-Clause license found in the
 * LICENSE file in the root directory of this source tree.
 */

import { css } from 'lit';

/**
 * Markdown editor CSS
 */
export const styles = css`
  :host {
    position: relative;
    display: block;
    font-family: inherit;
    -webkit-font-smoothing: var(--nile-webkit-font-smoothing, var(--ng-webkit-font-smoothing));
    -moz-osx-font-smoothing: var( --nile-moz-osx-font-smoothing,var(--ng-moz-osx-font-smoothing));
    text-rendering: var(--nile-text-rendering, var(--ng-text-rendering));
  }

  .editor {
    width: 100%;
    border: 1px solid var(--nile-colors-neutral-400, var(--ng-colors-border-neutral));
    border-radius: var(--nile-radius-radius-xl, var(--ng-radius-md));
    background: var(--nile-colors-white-base, var(--ng-colors-bg-primary));
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
  }

  .editor--disabled {
    border-color: var(--nile-colors-neutral-500, var(--ng-colors-border-disabled));
    background: var(--nile-colors-dark-200, var(--ng-colors-bg-disabled-subtle));
    cursor: not-allowed;
    pointer-events: none;
  }

  .header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    flex-wrap: wrap;
    padding: 8px;
    border-bottom: 1px solid var(--nile-colors-neutral-400, var(--ng-colors-border-neutral));
    background: var(--nile-colors-neutral-100, var(--ng-colors-bg-secondary));
    border-radius: 8px 8px 0 0;
    width: 100%;
    box-sizing: border-box;
  }

  .editor--disabled .header {
    border-color: var(--nile-colors-neutral-500, var(--ng-colors-border-disabled));
    background: var(--nile-colors-dark-200, var(--ng-colors-bg-disabled-subtle));
  }

  .tabs {
    display: flex;
  }

  /* Slimmer segmented control inside the editor header. */
  .tabs nile-button-toggle::part(base) {
    height: 28px;
    padding: var(--nile-spacing-xxs, var(--ng-spacing-xs))
      var(--nile-spacing-md, var(--ng-spacing-md));
    font-size: var(--nile-type-scale-2, var(--ng-font-size-text-sm));
  }

  .tab__content {
    display: inline-flex;
    align-items: center;
    gap: var(--nile-spacing-xs, var(--ng-spacing-xs));
  }

 

  .toolbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    min-width: 0;
  }

  .toolbar__button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0px 6px;
    box-sizing: border-box;
    border: none;
    background: transparent;
    border-radius: var(--nile-radius-radius-lg, var(--ng-radius-md));
    cursor: pointer;
    color: var(--nile-colors-dark-900, var(--ng-colors-text-primary-900));
    font-family: inherit;
    font-size: var(--nile-type-scale-3, var(--ng-font-size-text-md));
    transition: background 0.15s ease;
  }

  .toolbar__button:hover {
    background: var(--nile-colors-dark-100, var(--ng-colors-bg-primary-hover));
  }

  .toolbar__menu {
    display: inline-flex;
  }

  .toolbar__menu .toolbar__button {
    width: auto;
    gap: 2px;
  }

  .toolbar__button nile-icon {
    pointer-events: none;
  }

  .toolbar__divider {
    margin: 0 4px;
    display: inline-block;
    height: 24px;
    width: 1px;
    background: var(--nile-colors-neutral-400, var(--ng-colors-border-neutral));
  }

  .toolbar__glyph--heading {
    font-weight: bold;
  }

  .toolbar__glyph--strikethrough {
    text-decoration: line-through;
  }

  .toolbar__glyph--code {
    font-family: var(--nile-font-family-mono, monospace);
    font-size: var(--nile-type-scale-1, var(--ng-font-size-text-xs));
  }

  .body {
    display: flex;
    align-items: stretch;
    overflow: hidden;
    min-height: 160px;
    border-radius: 0 0 var(--nile-radius-radius-xl, var(--ng-radius-md))
      var(--nile-radius-radius-xl, var(--ng-radius-md));
  }

  .pane {
    flex: 1 1 0;
    min-width: 0;
  }

  /* Draggable divider between the write and preview panes in split mode. */
  .gutter {
    flex: 0 0 auto;
    position: relative;
    width: 1px;
    align-self: stretch;
    background: var(--nile-colors-neutral-400, var(--ng-colors-border-neutral));
    cursor: col-resize;
    touch-action: none;
  }

  /* Widen the hit area without shifting the 1px visual line. */
  .gutter::before {
    content: '';
    position: absolute;
    inset: 0 -4px;
  }

  .gutter:hover,
  .body--dragging .gutter {
    background: var(--nile-colors-primary-500, var(--ng-colors-border-brand));
  }

  /* Keep the drag smooth: no text selection or pointer capture by the panes. */
  .body--dragging {
    cursor: col-resize;
    user-select: none;
    -webkit-user-select: none;
  }

  .body--dragging .pane {
    pointer-events: none;
  }

  .pane--write {
    display: flex;
  }

  textarea {
    flex: 1;
    /* The body owns the resize/height now; the textarea fills it and scrolls
       its own overflow. min-height:0 lets it shrink when the body shrinks. */
    min-height: 0;
    width: 100%;
    padding: 12px;
    border: none;
    outline: none;
    resize: none;
    box-sizing: border-box;
    tab-size: 4;
    -moz-tab-size: 4;
    word-break: break-word;
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    color: inherit;
    background: var(--nile-colors-white-base, var(--ng-colors-bg-primary));
    border-radius: 0 0 var(--nile-radius-radius-xl, var(--ng-radius-md))
      var(--nile-radius-radius-xl, var(--ng-radius-md));
  }

  textarea::placeholder {
    color: var(--nile-colors-neutral-500, var(--ng-colors-text-secondary));
    font-family: var(--nile-font-family-sans-serif, var(--ng-font-family-body));
    opacity: 0.7;
  }

  .editor--disabled textarea {
    background: var(
      --nile-colors-dark-200,
      var(--ng-colors-bg-disabled-subtle)
    );
    color: var(--nile-colors-dark-500, var(--ng-colors-text-disabled));
    pointer-events: none;
    user-select: none;
    -webkit-user-select: none;
  }

  .pane--preview {
    min-height: 0;
    padding: 12px;
    overflow: auto;
    box-sizing: border-box;
    word-wrap: break-word;
    background: var(--nile-colors-white-base, var(--ng-colors-bg-primary));
    border-radius: 0 0 var(--nile-radius-radius-xl, var(--ng-radius-md))
      var(--nile-radius-radius-xl, var(--ng-radius-md));
  }

  .editor--disabled .pane--preview {
    background: var(
      --nile-colors-dark-200,
      var(--ng-colors-bg-disabled-subtle)
    );
    color: var(--nile-colors-dark-500, var(--ng-colors-text-disabled));
  }

  .editor--split .pane--preview {
    border-radius: 0 0 var(--nile-radius-radius-xl, var(--ng-radius-md)) 0;
  }

  .editor--split textarea {
    border-radius: 0 0 0 var(--nile-radius-radius-xl, var(--ng-radius-md));
  }

  .preview-empty {
    color: var(--nile-colors-neutral-500, var(--ng-colors-text-secondary));
    font-size: var(--nile-type-scale-2, var(--ng-font-size-text-sm));
    opacity: 0.7;
  }
`;