import { Button } from '@astryxdesign/core/Button';
import { Card } from '@astryxdesign/core/Card';
import { HStack } from '@astryxdesign/core/HStack';
import { Text } from '@astryxdesign/core/Text';
import { VStack } from '@astryxdesign/core/VStack';
import { ArrowRight, Boxes, Rocket, Store, type LucideIcon } from 'lucide-react';

/**
 * The first screen, and the only one whose job is not to collect anything.
 *
 * It exists to get somebody to begin, so it says what setup is worth and what
 * it costs, and nothing else. The temptation is to explain the whole product
 * here; a shopkeeper who has just signed in has no way to use any of it yet,
 * and a wall of text before the first field is what makes people close the tab.
 *
 * The one promise made in words is the one the state layer actually keeps:
 * progress is saved, so leaving is safe.
 */
/** One of the three cards under the greeting. */
export interface WelcomeBenefit {
  icon: LucideIcon;
  title: string;
  body: string;
}

export interface WelcomeStepProps {
  shopName?: string;
  done: number;
  total: number;
  isReturning: boolean;
  /**
   * What setup is worth, in three cards.
   *
   * Given by the caller because the two roles are promised different things: a
   * merchant is told about the catalogue and going on sale, a branch user about
   * their own account and their shelf. The SHAPE is shared — that is the point
   * of this component — and only the words differ.
   */
  benefits?: readonly WelcomeBenefit[];
  /** The greeting, when the default merchant wording is not the right one. */
  greeting?: string;
  blurb?: string;
  onStart: () => void;
}

const BENEFITS = [
  {
    icon: Rocket,
    title: 'Quick setup',
    body: 'Five short steps. Most shops are through it in a few minutes.',
  },
  {
    icon: Boxes,
    title: 'Manage your catalogue',
    body: 'Upload a spreadsheet or add products one at a time — whichever you have.',
  },
  {
    icon: Store,
    title: 'Ready for customers',
    body: 'Finish, and your products are on sale in the app.',
  },
] as const;

export function WelcomeStep({
  shopName,
  done,
  total,
  isReturning,
  benefits = BENEFITS,
  greeting,
  blurb,
  onStart,
}: WelcomeStepProps) {
  const pct = total === 0 ? 0 : Math.round((done / total) * 100);

  return (
    <VStack gap={4} className="ob-panel">
      <VStack gap={1.5} style={{ textAlign: 'center', alignItems: 'center' }}>
        {/* A mark rather than an illustration. A stock drawing would be the one
            thing on screen not drawn from the console's own design language. */}
        <span
          aria-hidden
          style={{
            width: 64,
            height: 64,
            borderRadius: 20,
            display: 'grid',
            placeItems: 'center',
            background: 'var(--color-brand-tint)',
            color: 'var(--color-brand)',
          }}
        >
          <Store size={28} />
        </span>

        <Text
          type="display-2"
          weight="semibold"
          style={{ fontFamily: 'var(--font-display)', textWrap: 'balance' }}
        >
          {isReturning ? 'Welcome back 👋' : (greeting ?? `Welcome${shopName ? ` to ${shopName}` : ''}! 👋`)}
        </Text>
        <Text
          type="body"
          color="secondary"
          style={{ maxWidth: '46ch', lineHeight: 1.65 }}
        >
          {isReturning
            ? `You have completed ${done} of ${total} setup steps. Pick up where you left off.`
            : (blurb ?? "Let's get your store ready to start selling.")}
        </Text>
      </VStack>

      <div className="ob-benefits">
        {benefits.map(({ icon: Icon, title, body }) => (
          <Card key={title} padding={3}>
            <VStack gap={1}>
              <span style={{ color: 'var(--color-brand)' }} aria-hidden>
                <Icon size={20} />
              </span>
              <Text type="label" size="sm" weight="semibold">
                {title}
              </Text>
              <Text type="body" size="sm" color="secondary" style={{ lineHeight: 1.6 }}>
                {body}
              </Text>
            </VStack>
          </Card>
        ))}
      </div>

      <VStack gap={1} style={{ alignItems: 'center' }}>
        <Text type="body" size="sm" color="secondary" hasTabularNumbers>
          {done} of {total} steps completed
        </Text>
        <div
          role="progressbar"
          aria-valuenow={done}
          aria-valuemin={0}
          aria-valuemax={total}
          aria-label="Setup progress"
          style={{
            width: 'min(320px, 100%)',
            height: 6,
            borderRadius: 999,
            background: 'var(--color-line)',
            overflow: 'hidden',
          }}
        >
          <div
            style={{
              width: `${pct}%`,
              height: '100%',
              background: 'var(--color-brand)',
              transition: 'width .35s cubic-bezier(.4,0,.2,1)',
            }}
          />
        </div>
      </VStack>

      <VStack gap={1} style={{ alignItems: 'center' }}>
        <HStack justify="center">
          <Button
            label={isReturning ? 'Continue setup' : 'Start setup'}
            variant="primary"
            size="lg"
            endContent={<ArrowRight size={15} />}
            onClick={onStart}
          />
        </HStack>
        <Text type="body" size="xsm" color="secondary">
          You can save your progress and continue later.
        </Text>
      </VStack>
    </VStack>
  );
}