From fd6ec6dacf90cc95bbaf1ed83b16310634af2406 Mon Sep 17 00:00:00 2001
From: Chen Asraf <chenasrafil@gmail.com>
Date: Wed, 12 Jul 2023 01:22:45 +0300
Subject: [PATCH] feat: type matchups

---
 lib/core/models/pokemon_helper.dart           | 64 +++++++++++++++++++
 .../PokemonDetails/pokemon_details_page.dart  | 63 ++++++++++++++----
 2 files changed, 116 insertions(+), 11 deletions(-)

diff --git a/lib/core/models/pokemon_helper.dart b/lib/core/models/pokemon_helper.dart
index 228f69b..84ac081 100644
--- a/lib/core/models/pokemon_helper.dart
+++ b/lib/core/models/pokemon_helper.dart
@@ -63,5 +63,69 @@ class PokemonHelper {
     return move.flavorTextEntries.firstWhereOrNull((n) => n.language.name == 'en')?.flavorText ??
         (move.flavorTextEntries.isNotEmpty ? move.flavorTextEntries.first.flavorText : '');
   }
+
+  static List<TypeMultiplier> getTypeDefenseMultipliers(List<Type> types) {
+    final typeMap = <String, double>{};
+    final typeNameMap = <String, NamedAPIResource>{};
+    for (final type in types) {
+      for (final damage in type.damageRelations.doubleDamageFrom) {
+        typeNameMap[damage.name] ??= damage;
+        typeMap[damage.name] = (typeMap[damage.name] ?? 1) * 2;
+      }
+      for (final damage in type.damageRelations.halfDamageFrom) {
+        typeNameMap[damage.name] ??= damage;
+        typeMap[damage.name] = (typeMap[damage.name] ?? 1) * 0.5;
+      }
+      for (final damage in type.damageRelations.noDamageFrom) {
+        typeNameMap[damage.name] ??= damage;
+        typeMap[damage.name] = (typeMap[damage.name] ?? 1) * 0;
+      }
+    }
+    return typeMap.entries.map((e) {
+      return TypeMultiplier(typeNameMap[e.key]!, e.value);
+    }).toList();
+  }
+
+  static List<TypeMultiplier> getTypeAttackMultipliers(List<Type> types) {
+    final typeMap = <String, double>{};
+    final typeNameMap = <String, NamedAPIResource>{};
+    for (final type in types) {
+      for (final damage in type.damageRelations.doubleDamageTo) {
+        typeNameMap[damage.name] ??= damage;
+        typeMap[damage.name] = (typeMap[damage.name] ?? 1) * 2;
+      }
+      for (final damage in type.damageRelations.halfDamageTo) {
+        typeNameMap[damage.name] ??= damage;
+        typeMap[damage.name] = (typeMap[damage.name] ?? 1) * 0.5;
+      }
+      for (final damage in type.damageRelations.noDamageTo) {
+        typeNameMap[damage.name] ??= damage;
+        typeMap[damage.name] = (typeMap[damage.name] ?? 1) * 0;
+      }
+    }
+    return typeMap.entries.map((e) {
+      return TypeMultiplier(typeNameMap[e.key]!, e.value);
+    }).toList();
+  }
+}
+
+class TypeMultiplier {
+  TypeMultiplier(this.type, this.multiplier);
+
+  final NamedAPIResource type;
+  final double multiplier;
+
+  String get name => type.name;
+  String get multiplierString =>
+      {
+        0.5: '½',
+        0.25: '¼',
+      }[multiplier] ??
+      multiplier.toStringAsFixed(2).replaceAll(RegExp(r'0+$'), '').replaceAll(RegExp(r'\.$'), '');
+
+  @override
+  String toString() {
+    return '$name x $multiplierString';
+  }
 }
 
diff --git a/lib/modules/PokemonDetails/pokemon_details_page.dart b/lib/modules/PokemonDetails/pokemon_details_page.dart
index a1fe471..238e1db 100644
--- a/lib/modules/PokemonDetails/pokemon_details_page.dart
+++ b/lib/modules/PokemonDetails/pokemon_details_page.dart
@@ -48,22 +48,60 @@ class PokemonDetailsPage extends StatelessWidget {
               PokemonImage(poke: poke, size: imgSize, shiny: true),
             ],
           ),
-      () => const Text('Weaknesses', textScaleFactor: 1.2),
+      () => const Text('Weak against', textScaleFactor: 1.2),
       () => FutureBuilder(
             future: Future.wait(poke.types.map((t) => t.type.get())),
             builder: (context, snapshot) {
               final data = snapshot.hasData
-                  ? snapshot.data!
-                      .toList()
-                      .fold(<NamedAPIResource>[], (prev, type) => prev..addAll(type.damageRelations.doubleDamageFrom))
-                  : <NamedAPIResource>[];
+                  ? PokemonHelper.getTypeDefenseMultipliers(snapshot.data!.toList()).where((e) => e.multiplier >= 2)
+                  : <TypeMultiplier>[];
               return Wrap(
                 children: [
-                  for (final weakness in data)
+                  for (final type in data)
                     Padding(
                       padding: const EdgeInsets.all(4.0),
                       child: Chip(
-                        label: Text('${weakness.name.capitalize()} x2'),
+                        label: Text('${type.type.name.capitalize()} x ${type.multiplierString}'),
+                      ),
+                    )
+                ],
+              );
+            },
+          ),
+      () => const Text('Resistant to', textScaleFactor: 1.2),
+      () => FutureBuilder(
+            future: Future.wait(poke.types.map((t) => t.type.get())),
+            builder: (context, snapshot) {
+              final data = snapshot.hasData
+                  ? PokemonHelper.getTypeDefenseMultipliers(snapshot.data!.toList()).where((e) => e.multiplier < 1 && e.multiplier > 0)
+                  : <TypeMultiplier>[];
+              return Wrap(
+                children: [
+                  for (final type in data)
+                    Padding(
+                      padding: const EdgeInsets.all(4.0),
+                      child: Chip(
+                        label: Text('${type.type.name.capitalize()} x ${type.multiplierString}'),
+                      ),
+                    )
+                ],
+              );
+            },
+          ),
+      () => const Text('No damage from', textScaleFactor: 1.2),
+      () => FutureBuilder(
+            future: Future.wait(poke.types.map((t) => t.type.get())),
+            builder: (context, snapshot) {
+              final data = snapshot.hasData
+                  ? PokemonHelper.getTypeDefenseMultipliers(snapshot.data!.toList()).where((e) => e.multiplier == 0)
+                  : <TypeMultiplier>[];
+              return Wrap(
+                children: [
+                  for (final type in data)
+                    Padding(
+                      padding: const EdgeInsets.all(4.0),
+                      child: Chip(
+                        label: Text('${type.type.name.capitalize()} x ${type.multiplierString}'),
                       ),
                     )
                 ],
@@ -150,7 +188,7 @@ class PokemonDetailsPage extends StatelessWidget {
           children: [
             if (icon != null)
               Container(
-                color: Colors.purple,
+                // color: Colors.purple,
                 child: CachedNetworkImage(
                   imageUrl: icon,
                   width: 40,
@@ -163,9 +201,12 @@ class PokemonDetailsPage extends StatelessWidget {
           ],
         ),
       ),
-      body: ListView.builder(
-        itemBuilder: (context, index) => children[index].call(),
-        itemCount: children.length,
+      body: Padding(
+        padding: const EdgeInsets.all(8.0),
+        child: ListView.builder(
+          itemBuilder: (context, index) => children[index].call(),
+          itemCount: children.length,
+        ),
       ),
     );
   }