report product

lib/domain/analytic/entities/product_analytic_entity.dart

@@ -0,0 +1,97 @@
+part of '../analytic.dart';
+
+@freezed
+class ProductAnalytic with _$ProductAnalytic {
+  const ProductAnalytic._();
+
+  const factory ProductAnalytic({
+    required String organizationId,
+    required String outletId,
+    required DateTime dateFrom,
+    required DateTime dateTo,
+    required List<ProductAnalyticItem> data,
+  }) = _ProductAnalytic;
+
+  factory ProductAnalytic.empty() => ProductAnalytic(
+    organizationId: '',
+    outletId: '',
+    dateFrom: DateTime.now(),
+    dateTo: DateTime.now(),
+    data: const [],
+  );
+
+  ProductAnalyticItem get bestProduct {
+    if (data.isEmpty) {
+      return ProductAnalyticItem.empty();
+    }
+
+    return data.first;
+  }
+
+  List<ProductAnalyticCategoryItem> get categories {
+    final Map<String, ProductAnalyticCategoryItem> categoryMap = {};
+
+    for (final product in data) {
+      final key = product.categoryName;
+
+      if (categoryMap.containsKey(key)) {
+        final existing = categoryMap[key]!;
+        categoryMap[key] = existing.copyWith(
+          productCount: existing.productCount + 1,
+          totalRevenue: existing.totalRevenue + product.revenue,
+        );
+      } else {
+        categoryMap[key] = ProductAnalyticCategoryItem(
+          categoryName: product.categoryName,
+          productCount: 1,
+          totalRevenue: product.revenue,
+        );
+      }
+    }
+
+    final categorySummary = categoryMap.values.toList()
+      ..sort((a, b) => b.totalRevenue.compareTo(a.totalRevenue));
+
+    return categorySummary;
+  }
+}
+
+@freezed
+class ProductAnalyticItem with _$ProductAnalyticItem {
+  const factory ProductAnalyticItem({
+    required String productId,
+    required String productName,
+    required String categoryId,
+    required String categoryName,
+    required int quantitySold,
+    required int revenue,
+    required double averagePrice,
+    required int orderCount,
+  }) = _ProductAnalyticItem;
+
+  factory ProductAnalyticItem.empty() => const ProductAnalyticItem(
+    productId: '',
+    productName: '',
+    categoryId: '',
+    categoryName: '',
+    quantitySold: 0,
+    revenue: 0,
+    averagePrice: 0.0,
+    orderCount: 0,
+  );
+}
+
+@freezed
+class ProductAnalyticCategoryItem with _$ProductAnalyticCategoryItem {
+  const factory ProductAnalyticCategoryItem({
+    required String categoryName,
+    required int productCount,
+    required int totalRevenue,
+  }) = _ProductAnalyticCategoryItem;
+
+  factory ProductAnalyticCategoryItem.empty() => ProductAnalyticCategoryItem(
+    categoryName: '',
+    productCount: 0,
+    totalRevenue: 0,
+  );
+}