<?php

namespace App\Http\Controllers\Seller;

use App\Http\Controllers\Controller;
use App\Models\Business;
use App\Models\Product;
use App\Models\ProductImage;
use App\Traits\FileStorageHelper;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;

class ProductImageController extends Controller
{
    use FileStorageHelper;

    /**
     * Upload a new product image
     */
    public function upload(Request $request, Business $business, Product $product)
    {
        // CRITICAL: Ensure product belongs to this business through brand
        $product = Product::whereHas('brand', function ($query) use ($business) {
            $query->where('business_id', $business->id);
        })->findOrFail($product->id);

        // Validate image
        $request->validate([
            'image' => 'required|image|mimes:jpeg,jpg,png|max:2048|dimensions:min_width=750,min_height=384', // 2MB max, 750x384 min
        ]);

        // Check if product already has 6 images
        if ($product->images()->count() >= 6) {
            return response()->json([
                'success' => false,
                'message' => 'Maximum of 6 images allowed per product'
            ], 422);
        }

        // Store the image using trait method
        $path = $this->storeFile($request->file('image'), 'products');

        // Determine if this should be the primary image (first one)
        $isPrimary = $product->images()->count() === 0;

        // If setting as primary, unset other primary images
        if ($isPrimary) {
            $product->images()->update(['is_primary' => false]);
        }

        // Create the image record
        $image = $product->images()->create([
            'path' => $path,
            'is_primary' => $isPrimary,
            'sort_order' => $product->images()->max('sort_order') + 1,
        ]);

        return response()->json([
            'success' => true,
            'image' => [
                'id' => $image->id,
                'path' => $image->path,
                'is_primary' => $image->is_primary,
            ]
        ]);
    }

    /**
     * Delete a product image
     */
    public function delete(Business $business, Product $product, ProductImage $image)
    {
        // CRITICAL: Ensure product belongs to this business through brand
        $product = Product::whereHas('brand', function ($query) use ($business) {
            $query->where('business_id', $business->id);
        })->findOrFail($product->id);

        // Ensure image belongs to this product
        if ($image->product_id !== $product->id) {
            return response()->json([
                'success' => false,
                'message' => 'Image not found'
            ], 404);
        }

        // Delete the file from storage using trait method
        $this->deleteFile($image->path);

        // If deleting primary image, set next image as primary
        if ($image->is_primary) {
            $nextImage = $product->images()
                ->where('id', '!=', $image->id)
                ->orderBy('sort_order')
                ->first();

            if ($nextImage) {
                $nextImage->update(['is_primary' => true]);
            }
        }

        $image->delete();

        return response()->json(['success' => true]);
    }

    /**
     * Reorder product images
     */
    public function reorder(Request $request, Business $business, Product $product)
    {
        // CRITICAL: Ensure product belongs to this business through brand
        $product = Product::whereHas('brand', function ($query) use ($business) {
            $query->where('business_id', $business->id);
        })->findOrFail($product->id);

        $request->validate([
            'order' => 'required|array',
            'order.*' => 'required|integer|exists:product_images,id'
        ]);

        $order = $request->input('order');

        // Update sort order and set first image as primary
        foreach ($order as $index => $imageId) {
            $image = ProductImage::where('id', $imageId)
                ->where('product_id', $product->id)
                ->first();

            if ($image) {
                $image->update([
                    'sort_order' => $index,
                    'is_primary' => $index === 0, // First image is primary
                ]);
            }
        }

        return response()->json(['success' => true]);
    }

    /**
     * Set an image as primary
     */
    public function setPrimary(Business $business, Product $product, ProductImage $image)
    {
        // CRITICAL: Ensure product belongs to this business through brand
        $product = Product::whereHas('brand', function ($query) use ($business) {
            $query->where('business_id', $business->id);
        })->findOrFail($product->id);

        // Ensure image belongs to this product
        if ($image->product_id !== $product->id) {
            return response()->json([
                'success' => false,
                'message' => 'Image not found'
            ], 404);
        }

        // Unset all primary flags for this product
        $product->images()->update(['is_primary' => false]);

        // Set this image as primary
        $image->update(['is_primary' => true]);

        return response()->json(['success' => true]);
    }
}