import type { Meta, StoryObj } from '@storybook/react-vite';
import { expect, within } from 'storybook/test';
import { biergartenThemes } from '../app/lib/themes';

const themesDescription = `Palette reference for all Biergarten themes. Each panel shows the main semantic color pairs, status tokens, and custom content tokens so you can catch contrast issues, pairing mistakes, and mood drift before they show up in real components.`;

function ThemeSwatch({ label, className }: { label: string; className: string }) {
   return <div className={`rounded-box p-3 text-sm font-medium ${className}`}>{label}</div>;
}

/** For custom tokens not covered by Tailwind utilities (surface, muted, highlight). */
function CssVarSwatch({ label, bg, color }: { label: string; bg: string; color: string }) {
   return (
      <div
         className="rounded-box p-3 text-sm font-medium"
         style={{ backgroundColor: `var(${bg})`, color: `var(${color})` }}
      >
         {label}
      </div>
   );
}

function TextTokenSample({
   label,
   background,
   text,
}: {
   label: string;
   background: string;
   text: string;
}) {
   return (
      <div className="rounded-box p-3" style={{ backgroundColor: `var(${background})` }}>
         <p className="text-xs font-semibold uppercase tracking-wide text-base-content/50">
            {label}
         </p>
         <p className="mt-1 text-sm font-medium" style={{ color: `var(${text})` }}>
            Secondary copy, placeholders, and helper text.
         </p>
      </div>
   );
}

function ThemePanel({ label, value, vibe }: { label: string; value: string; vibe: string }) {
   return (
      <section
         data-theme={value}
         className="rounded-box border border-base-300 bg-base-100 shadow-lg"
      >
         <div className="space-y-4 p-5">
            <div className="space-y-1">
               <h2 className="text-2xl font-bold">{label}</h2>
               <p className="text-sm text-base-content/70">{vibe}</p>
            </div>

            {/* Core palette */}
            <div>
               <p className="mb-1.5 text-xs font-semibold uppercase tracking-wide text-base-content/50">
                  Core
               </p>
               <div className="grid gap-2 sm:grid-cols-2">
                  <ThemeSwatch label="Primary" className="bg-primary text-primary-content" />
                  <ThemeSwatch label="Secondary" className="bg-secondary text-secondary-content" />
                  <ThemeSwatch label="Accent" className="bg-accent text-accent-content" />
                  <ThemeSwatch label="Neutral" className="bg-neutral text-neutral-content" />
               </div>
            </div>

            {/* Status tokens */}
            <div>
               <p className="mb-1.5 text-xs font-semibold uppercase tracking-wide text-base-content/50">
                  Status
               </p>
               <div className="grid gap-2 grid-cols-2 sm:grid-cols-4">
                  <ThemeSwatch label="Info" className="bg-info text-info-content" />
                  <ThemeSwatch label="Success" className="bg-success text-success-content" />
                  <ThemeSwatch label="Warning" className="bg-warning text-warning-content" />
                  <ThemeSwatch label="Error" className="bg-error text-error-content" />
               </div>
            </div>

            {/* Content tokens (custom) */}
            <div>
               <p className="mb-1.5 text-xs font-semibold uppercase tracking-wide text-base-content/50">
                  Content
               </p>
               <div className="grid gap-2 sm:grid-cols-3">
                  <CssVarSwatch
                     label="Surface"
                     bg="--color-surface"
                     color="--color-surface-content"
                  />
                  <TextTokenSample
                     label="Muted on Base"
                     background="--color-base-100"
                     text="--color-muted"
                  />
                  <CssVarSwatch
                     label="Highlight"
                     bg="--color-highlight"
                     color="--color-highlight-content"
                  />
               </div>
               <div className="mt-2">
                  <TextTokenSample
                     label="Muted on Surface"
                     background="--color-surface"
                     text="--color-muted"
                  />
               </div>
            </div>

            <div className="flex flex-wrap gap-2">
               <button className="btn btn-primary btn-sm">Primary</button>
               <button className="btn btn-secondary btn-sm">Secondary</button>
               <button className="btn btn-outline btn-sm">Outline</button>
            </div>

            <div role="alert" className="alert alert-success alert-soft">
               <span>Semantic tokens stay stable while the atmosphere changes.</span>
            </div>
         </div>
      </section>
   );
}

const meta = {
   title: 'Themes/Biergarten Themes',
   parameters: {
      layout: 'fullscreen',
      docs: {
         description: {
            component: themesDescription,
         },
      },
   },
   tags: ['autodocs'],
   render: () => (
      <div className="grid gap-6 p-6 lg:grid-cols-2">
         {biergartenThemes.map((theme) => (
            <ThemePanel key={theme.value} {...theme} />
         ))}
      </div>
   ),
} satisfies Meta;

export default meta;
type Story = StoryObj<typeof meta>;

export const Gallery: Story = {
   play: async ({ canvasElement }) => {
      const canvas = within(canvasElement);
      for (const theme of biergartenThemes) {
         await expect(canvas.getByRole('heading', { name: theme.label })).toBeInTheDocument();
      }
   },
};