"use client";

import { Alert, Button, Card } from "@heroui/react";
import type { CheckoutValidationResult } from "@/lib/checkout/types";
import { CheckoutLineItems } from "../content/CheckoutLineItems";
import { CheckoutOrderSummary } from "../content/CheckoutOrderSummary";

type CartValidationStepProps = {
  result: CheckoutValidationResult;
  onProceed: () => void;
  onBackToCart: () => void;
};

export function CartValidationStep({
  result,
  onProceed,
  onBackToCart,
}: CartValidationStepProps) {
  const hasBlockingIssues = !result.valid;
  const hasPriceWarnings =
    result.valid &&
    result.issues.some((i) => i.type === "price_changed");

  const itemCount = result.items.reduce((sum, i) => sum + i.quantity, 0);

  const issueBannerId = "checkout-issue-banner";

  return (
    <div className="flex flex-col gap-6">
      {/* Issue banners */}
      {hasBlockingIssues && (
        <Alert id={issueBannerId} status="danger" role="alert">
          <Alert.Indicator />
          <Alert.Content>
            <Alert.Title>Some items need attention</Alert.Title>
            <Alert.Description>
              Please return to your cart to resolve the issues below, then
              try again.
            </Alert.Description>
          </Alert.Content>
        </Alert>
      )}

      {hasPriceWarnings && (
        <Alert id={issueBannerId} status="accent">
          <Alert.Indicator />
          <Alert.Content>
            <Alert.Title>Prices updated</Alert.Title>
            <Alert.Description>
              Some prices have changed since you added items. The current
              prices are shown below.
            </Alert.Description>
          </Alert.Content>
        </Alert>
      )}

      {/* Two-column on lg: items + sticky summary/actions */}
      <div className="grid grid-cols-1 gap-6 lg:grid-cols-[1fr,340px] lg:items-start">
        {/* Line items */}
        <div>
          <CheckoutLineItems items={result.items} issues={result.issues} />
        </div>

        {/* Summary + actions sidebar */}
        <div className="lg:sticky lg:top-8 lg:self-start">
          <Card className="rounded-lg p-4">
            <Card.Content className="flex flex-col gap-4 p-0">
              <CheckoutOrderSummary
                subtotal={result.subtotal}
                itemCount={itemCount}
              />
              <div className="flex flex-col gap-2">
                <Button
                  className="w-full bg-[#236f6b] font-medium text-white"
                  size="lg"
                  onPress={onProceed}
                  isDisabled={hasBlockingIssues}
                  aria-disabled={hasBlockingIssues || undefined}
                  aria-describedby={
                    hasBlockingIssues ? issueBannerId : undefined
                  }
                >
                  Continue to shipping
                </Button>
                <Button
                  variant="ghost"
                  className="w-full md:w-auto"
                  onPress={onBackToCart}
                >
                  Back to cart
                </Button>
              </div>
            </Card.Content>
          </Card>
        </div>
      </div>
    </div>
  );
}