import React, { useState, useEffect } from 'react';
import { SettingsLayout } from '@/routes/Settings/components/SettingsLayout';
import { SettingsCard } from '@/routes/Settings/components/SettingsCard';
import { SettingsSection } from '@/routes/Settings/components/SettingsSection';
import { Label } from '@/components/ui/label';
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
import { Switch } from '@/components/ui/switch';
import { toast } from 'sonner';
import { api } from '@/lib/api';

export default function AppearanceProduct() {
  const [loading, setLoading] = useState(true);
  const [imagePosition, setImagePosition] = useState('left');
  const [galleryStyle, setGalleryStyle] = useState('thumbnails');
  const [stickyAddToCart, setStickyAddToCart] = useState(false);
  
  const [elements, setElements] = useState({
    breadcrumbs: true,
    related_products: true,
    reviews: true,
    share_buttons: false,
    product_meta: true,
  });

  const [reviewSettings, setReviewSettings] = useState({
    placement: 'product_page',
    hide_if_empty: true,
  });

  const [relatedProductsTitle, setRelatedProductsTitle] = useState('You May Also Like');

  useEffect(() => {
    const loadSettings = async () => {
      try {
        const response = await api.get('/appearance/settings');
        const product = response.data?.pages?.product;
        
        if (product) {
          if (product.layout) {
            if (product.layout.image_position) setImagePosition(product.layout.image_position);
            if (product.layout.gallery_style) setGalleryStyle(product.layout.gallery_style);
            if (product.layout.sticky_add_to_cart !== undefined) setStickyAddToCart(product.layout.sticky_add_to_cart);
          }
          if (product.elements) {
            setElements({
              breadcrumbs: product.elements.breadcrumbs ?? true,
              related_products: product.elements.related_products ?? true,
              reviews: product.elements.reviews ?? true,
              share_buttons: product.elements.share_buttons ?? false,
              product_meta: product.elements.product_meta ?? true,
            });
          }
          if (product.related_products) {
            setRelatedProductsTitle(product.related_products.title ?? 'You May Also Like');
          }
          if (product.reviews) {
            setReviewSettings({
              placement: product.reviews.placement ?? 'product_page',
              hide_if_empty: product.reviews.hide_if_empty ?? true,
            });
          }
        }
      } catch (error) {
        console.error('Failed to load settings:', error);
      } finally {
        setLoading(false);
      }
    };
    
    loadSettings();
  }, []);

  const toggleElement = (key: keyof typeof elements) => {
    setElements({ ...elements, [key]: !elements[key] });
  };

  const handleSave = async () => {
    try {
      await api.post('/appearance/pages/product', {
        layout: { 
          image_position: imagePosition, 
          gallery_style: galleryStyle, 
          sticky_add_to_cart: stickyAddToCart 
        },
        elements,
        related_products: {
          title: relatedProductsTitle,
        },
        reviews: reviewSettings,
      });
      toast.success('Product page settings saved successfully');
    } catch (error) {
      console.error('Save error:', error);
      toast.error('Failed to save settings');
    }
  };

  return (
    <SettingsLayout
      title="Product Page Settings"
      onSave={handleSave}
      isLoading={loading}
    >
      {/* Layout */}
      <SettingsCard
        title="Layout"
        description="Configure product page layout and gallery"
      >
        <SettingsSection label="Image Position" htmlFor="image-position">
          <Select value={imagePosition} onValueChange={setImagePosition}>
            <SelectTrigger id="image-position">
              <SelectValue />
            </SelectTrigger>
            <SelectContent>
              <SelectItem value="left">Left</SelectItem>
              <SelectItem value="right">Right</SelectItem>
              <SelectItem value="top">Top</SelectItem>
            </SelectContent>
          </Select>
        </SettingsSection>

        <SettingsSection label="Gallery Style" htmlFor="gallery-style">
          <Select value={galleryStyle} onValueChange={setGalleryStyle}>
            <SelectTrigger id="gallery-style">
              <SelectValue />
            </SelectTrigger>
            <SelectContent>
              <SelectItem value="thumbnails">Thumbnails</SelectItem>
              <SelectItem value="dots">Dots</SelectItem>
              <SelectItem value="slider">Slider</SelectItem>
            </SelectContent>
          </Select>
        </SettingsSection>

        <div className="flex items-center justify-between">
          <div className="space-y-0.5">
            <Label htmlFor="sticky-cart">Sticky Add to Cart</Label>
            <p className="text-sm text-muted-foreground">
              Keep add to cart button visible when scrolling
            </p>
          </div>
          <Switch
            id="sticky-cart"
            checked={stickyAddToCart}
            onCheckedChange={setStickyAddToCart}
          />
        </div>
      </SettingsCard>

      {/* Elements */}
      <SettingsCard
        title="Elements"
        description="Choose which elements to display on the product page"
      >
        <div className="flex items-center justify-between">
          <Label htmlFor="element-breadcrumbs" className="cursor-pointer">
            Show breadcrumbs
          </Label>
          <Switch
            id="element-breadcrumbs"
            checked={elements.breadcrumbs}
            onCheckedChange={() => toggleElement('breadcrumbs')}
          />
        </div>

        <div className="flex items-center justify-between">
          <Label htmlFor="element-related-products" className="cursor-pointer">
            Show related products
          </Label>
          <Switch
            id="element-related-products"
            checked={elements.related_products}
            onCheckedChange={() => toggleElement('related_products')}
          />
        </div>

        <div className="flex items-center justify-between">
          <Label htmlFor="element-reviews" className="cursor-pointer">
            Show reviews
          </Label>
          <Switch
            id="element-reviews"
            checked={elements.reviews}
            onCheckedChange={() => toggleElement('reviews')}
          />
        </div>

        <div className="flex items-center justify-between">
          <Label htmlFor="element-share-buttons" className="cursor-pointer">
            Show share buttons
          </Label>
          <Switch
            id="element-share-buttons"
            checked={elements.share_buttons}
            onCheckedChange={() => toggleElement('share_buttons')}
          />
        </div>

        <div className="flex items-center justify-between">
          <div className="space-y-0.5">
            <Label htmlFor="element-product-meta" className="cursor-pointer">
              Show product meta
            </Label>
            <p className="text-sm text-muted-foreground">
              SKU, categories, tags
            </p>
          </div>
          <Switch
            id="element-product-meta"
            checked={elements.product_meta}
            onCheckedChange={() => toggleElement('product_meta')}
          />
        </div>
      </SettingsCard>

      {/* Related Products Settings */}
      <SettingsCard
        title="Related Products"
        description="Configure related products section"
      >
        <SettingsSection label="Section Title" htmlFor="related-products-title">
          <input
            id="related-products-title"
            type="text"
            value={relatedProductsTitle}
            onChange={(e) => setRelatedProductsTitle(e.target.value)}
            className="flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50"
            placeholder="You May Also Like"
          />
          <p className="text-sm text-muted-foreground mt-2">
            This heading appears above the related products grid
          </p>
        </SettingsSection>
      </SettingsCard>

      {/* Review Settings */}
      <SettingsCard
        title="Review Settings"
        description="Configure how and where reviews are displayed"
      >
        <SettingsSection label="Review Placement" htmlFor="review-placement">
          <Select value={reviewSettings.placement} onValueChange={(value) => setReviewSettings({ ...reviewSettings, placement: value })}>
            <SelectTrigger id="review-placement">
              <SelectValue />
            </SelectTrigger>
            <SelectContent>
              <SelectItem value="product_page">Product Page (Traditional)</SelectItem>
              <SelectItem value="order_details">Order Details Only (Marketplace Style)</SelectItem>
            </SelectContent>
          </Select>
          <p className="text-sm text-muted-foreground mt-2">
            {reviewSettings.placement === 'product_page' 
              ? 'Reviews appear on product page. Users can submit reviews directly on the product.'
              : 'Reviews only appear in order details after purchase. Ensures verified purchases only.'}
          </p>
        </SettingsSection>

        {reviewSettings.placement === 'product_page' && (
          <div className="flex items-center justify-between">
            <div className="space-y-0.5">
              <Label htmlFor="hide-if-empty" className="cursor-pointer">
                Hide reviews section if empty
              </Label>
              <p className="text-sm text-muted-foreground">
                Only show reviews section when product has at least one review
              </p>
            </div>
            <Switch
              id="hide-if-empty"
              checked={reviewSettings.hide_if_empty}
              onCheckedChange={(checked) => setReviewSettings({ ...reviewSettings, hide_if_empty: checked })}
            />
          </div>
        )}
      </SettingsCard>
    </SettingsLayout>
  );
}
