'use client';

import * as Icons from '../Icons';
import OptionGrid, { toOptions } from '../fields/OptionGrid';
import {
  PHOTO_GRID_COLUMNS_MAX,
  PHOTO_GRID_COLUMNS_MIN,
  PHOTO_GRID_GAP_MAX,
} from '@/lib/config/schema';
import type { SectionProps } from './types';

const LAYOUTS = ['masonry', 'uniform', 'showcase', 'filmstrip', 'editorial-flow', 'justified'];
const ASPECT_RATIOS = ['1', '3/2', '2/3', '16/9', 'auto'];

const LAYOUT_INFO: Record<string, { label: string; desc: string }> = {
  masonry: {
    label: 'Masonry',
    desc: 'Dynamic pinterest-style staggered columns',
  },
  uniform: { label: 'Uniform Grid', desc: 'Clean equal aspect ratio grid' },
  showcase: {
    label: 'Showcase',
    desc: 'Featured hero photos mixed with smaller tiles',
  },
  filmstrip: {
    label: 'Filmstrip',
    desc: 'Horizontal scrollable film strip timeline',
  },
  'editorial-flow': {
    label: 'Editorial Flow',
    desc: 'Magazine story layout with varying photo sizes',
  },
  justified: {
    label: 'Justified (Experimental)',
    desc: 'Equal-height rows that fill the full width',
  },
};
const LAYOUT_OPTIONS = toOptions(LAYOUTS, LAYOUT_INFO);

function LayoutPreview({ value }: { value: string }) {
  return (
    <div className="grid-card-preview">
      <div className={`mini-layout-demo layout-demo-${value}`}>
        {value === 'masonry' && (
          <div className="demo-masonry-col-group">
            <div className="demo-col">
              <div className="demo-tile h-high" />
              <div className="demo-tile h-low" />
            </div>
            <div className="demo-col">
              <div className="demo-tile h-low" />
              <div className="demo-tile h-high" />
            </div>
            <div className="demo-col">
              <div className="demo-tile h-med" />
              <div className="demo-tile h-med" />
            </div>
          </div>
        )}
        {value === 'uniform' && (
          <div className="demo-uniform-grid">
            <div className="demo-tile" />
            <div className="demo-tile" />
            <div className="demo-tile" />
            <div className="demo-tile" />
            <div className="demo-tile" />
            <div className="demo-tile" />
          </div>
        )}
        {value === 'showcase' && (
          <div className="demo-showcase-grid">
            <div className="demo-tile demo-hero" />
            <div className="demo-col">
              <div className="demo-tile" />
              <div className="demo-tile" />
            </div>
          </div>
        )}
        {value === 'filmstrip' && (
          <div className="demo-filmstrip-row">
            <div className="demo-tile strip" />
            <div className="demo-tile strip" />
            <div className="demo-tile strip" />
          </div>
        )}
        {value === 'editorial-flow' && (
          <div className="demo-editorial-flow">
            <div className="demo-tile wide" />
            <div className="demo-row">
              <div className="demo-tile" />
              <div className="demo-tile" />
            </div>
          </div>
        )}
        {value === 'justified' && (
          <div className="demo-editorial-flow">
            <div className="demo-row">
              <div className="demo-tile wide" />
              <div className="demo-tile" />
            </div>
            <div className="demo-row">
              <div className="demo-tile" />
              <div className="demo-tile wide" />
            </div>
          </div>
        )}
      </div>
    </div>
  );
}

const ASPECT_RATIO_INFO: Record<string, { label: string; desc: string }> = {
  '1': { label: 'Square (1:1)', desc: '1:1 ratio square crops' },
  '3/2': { label: 'Landscape (3:2)', desc: 'Standard 35mm DSLR landscape' },
  '2/3': { label: 'Portrait (2:3)', desc: 'Vertical portrait orientation' },
  '16/9': { label: 'Cinema (16:9)', desc: 'Widescreen 16:9 cinematic ratio' },
  auto: {
    label: 'Original Auto',
    desc: 'Uncropped original image proportions',
  },
};
const ASPECT_RATIO_OPTIONS = toOptions(ASPECT_RATIOS, ASPECT_RATIO_INFO);

function AspectRatioPreview({ value }: { value: string }) {
  return (
    <div className="ratio-card-preview">
      <div className={`mini-aspect-box ratio-${value.replace('/', '-')}`}>
        <div className="mini-aspect-inner" />
      </div>
    </div>
  );
}

export default function GridSection({ settings, update }: SectionProps) {
  return (
    <div className="settings-panel">
      <div className="settings-section-header">
        <h3>
          <Icons.IconGrid size={18} /> Grid &amp; Layout Engine
        </h3>
        <p className="settings-section-sub">
          Configure photography gallery column structures and thumbnail aspect ratios.
        </p>
      </div>

      <OptionGrid
        label="Layout Algorithm"
        options={LAYOUT_OPTIONS}
        value={settings.grid?.layout || 'masonry'}
        onSelect={(v) => update('grid.layout', v)}
        cardClassName="grid-layout-card"
        renderPreview={(o) => <LayoutPreview value={o.value} />}
      />

      <OptionGrid
        label="Aspect Ratio"
        options={ASPECT_RATIO_OPTIONS}
        value={settings.grid?.aspectRatio || '1'}
        onSelect={(v) => update('grid.aspectRatio', v)}
        cardClassName="ratio-card"
        renderPreview={(o) => <AspectRatioPreview value={o.value} />}
      />

      <div className="settings-section-divider" />

      <div className="settings-section-header">
        <h3>
          <Icons.IconColumns size={18} /> Spacing &amp; Columns
        </h3>
        <p className="settings-section-sub">
          Adjust column counts and grid gap spacing. The column count also tiles the album covers on
          a subpage; their spacing stays with the theme unless a page overrides it.
        </p>
      </div>

      <div className="admin-field-row">
        <div className="admin-field">
          <label htmlFor="grid-columns">
            Columns ({PHOTO_GRID_COLUMNS_MIN} - {PHOTO_GRID_COLUMNS_MAX})
          </label>
          <input
            id="grid-columns"
            type="number"
            min={PHOTO_GRID_COLUMNS_MIN}
            max={PHOTO_GRID_COLUMNS_MAX}
            value={settings.grid?.columns ?? 3}
            onChange={(e) => update('grid.columns', parseInt(e.target.value) || 3)}
          />
        </div>
        <div className="admin-field">
          <label htmlFor="grid-gap-spacing">Gap Spacing (px)</label>
          <input
            id="grid-gap-spacing"
            type="number"
            min={0}
            max={PHOTO_GRID_GAP_MAX}
            value={settings.grid?.gap ?? 12}
            onChange={(e) => update('grid.gap', parseInt(e.target.value) || 0)}
          />
        </div>
      </div>
    </div>
  );
}