// src/Webshop.Application/Services/Public/ReviewService.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Webshop.Application;
using Webshop.Application.DTOs.Reviews;
using Webshop.Domain.Interfaces;

namespace Webshop.Application.Services.Public
{
    public class ReviewService : IReviewService
    {
        private readonly IReviewRepository _reviewRepository;
        private readonly IProductRepository _productRepository;

        public ReviewService(IReviewRepository reviewRepository, IProductRepository productRepository)
        {
            _reviewRepository = reviewRepository;
            _productRepository = productRepository;
        }

        public async Task<ServiceResult<IEnumerable<ReviewDto>>> GetApprovedReviewsByProductIdAsync(Guid productId)
        {
            // Prüfung: Existiert das Produkt und ist es für die Öffentlichkeit sichtbar?
            var product = await _productRepository.GetProductByIdAsync(productId);
            if (product == null || !product.IsActive)
            {
                return ServiceResult.Fail<IEnumerable<ReviewDto>>(ServiceResultType.NotFound, $"Produkt mit ID '{productId}' wurde nicht gefunden oder ist nicht aktiv.");
            }

            var reviews = await _reviewRepository.GetApprovedByProductIdAsync(productId);

            var dtos = reviews.Select(r => new ReviewDto
            {
                // Anonymisiertes Mapping für die öffentliche Ansicht
                CustomerName = (r.Customer != null) ? $"{r.Customer.FirstName} {r.Customer.LastName?.FirstOrDefault()}." : "Anonym",
                Rating = r.Rating,
                Title = r.Title,
                Comment = r.Comment,
                ReviewDate = r.ReviewDate
            }).ToList();

            return ServiceResult.Ok<IEnumerable<ReviewDto>>(dtos);
        }
    }
}