#!/bin/bash

# Favorites Feature Simplification Summary
# Date: 2025-11-18
# 
# CHANGES MADE:
# =============
#
# 1. Simplified favorites_provider.dart
#    - Removed old Favorites provider (Set<String> of product IDs)
#    - Kept only FavoriteProducts provider (List<Product>)
#    - Helper providers now derive from FavoriteProducts:
#      * isFavorite(productId) - checks if product is in list
#      * favoriteCount() - counts products in list
#      * favoriteProductIds() - maps to list of product IDs
#    - Add/remove methods now use favoriteProductsProvider.notifier
#    - No userId filtering - uses authenticated API session
#
# 2. Updated favorites_page.dart
#    - Changed clearAll to show "under development" message
#    - Still watches favoriteProductsProvider (already correct)
#
# 3. Updated favorite_product_card.dart
#    - Changed from favoritesProvider.notifier to favoriteProductsProvider.notifier
#    - Remove favorite now calls the correct provider
#
# 4. Updated product_detail_page.dart
#    - Changed toggleFavorite from favoritesProvider.notifier to favoriteProductsProvider.notifier
#
# KEY BEHAVIORS:
# ==============
#
# - All favorites operations work with Product entities directly
# - No userId parameter needed in UI code
# - Repository methods still use 'current_user' as dummy userId for backwards compatibility
# - API calls use authenticated session (token-based)
# - Add/remove operations refresh the products list after success
# - Helper providers safely return defaults during loading/error states
#
# FILES MODIFIED:
# ==============
# 1. lib/features/favorites/presentation/providers/favorites_provider.dart
# 2. lib/features/favorites/presentation/pages/favorites_page.dart
# 3. lib/features/favorites/presentation/widgets/favorite_product_card.dart
# 4. lib/features/products/presentation/pages/product_detail_page.dart
#
# ARCHITECTURE:
# ============
#
# Main Provider:
#   FavoriteProducts (AsyncNotifierProvider<List<Product>>)
#     ├── build() - loads products from repository
#     ├── addFavorite(productId) - calls API, refreshes list
#     ├── removeFavorite(productId) - calls API, refreshes list
#     ├── toggleFavorite(productId) - adds or removes based on current state
#     └── refresh() - manual refresh for pull-to-refresh
#
# Helper Providers (derived from FavoriteProducts):
#   isFavorite(productId) - bool
#   favoriteCount() - int
#   favoriteProductIds() - List<String>
#
# Data Flow:
#   UI -> FavoriteProducts.notifier.method() -> Repository -> API
#   API Response -> Repository caches locally -> Provider updates state
#   Helper Providers watch FavoriteProducts and derive values
#
# TESTING:
# ========
# To verify the changes work:
# 1. Add products to favorites from product detail page
# 2. View favorites page - should load product list
# 3. Remove products from favorites page
# 4. Toggle favorites from product cards
# 5. Check that favoriteCount updates in real-time
# 6. Test offline mode - should use cached products

echo "Favorites feature simplified successfully!"
echo "Main provider: FavoriteProducts (List<Product>)"
echo "Helper providers derive from product list"
echo "No userId filtering - uses API auth session"
