Add script runtime lifecycle skeleton

engine/include/XCEngine/Scripting/ScriptEngine.h

@@ -0,0 +1,88 @@
+#pragma once
+
+#include <XCEngine/Scripting/IScriptRuntime.h>
+#include <XCEngine/Scripting/NullScriptRuntime.h>
+
+#include <cstddef>
+#include <cstdint>
+#include <unordered_map>
+#include <vector>
+
+namespace XCEngine {
+namespace Scripting {
+
+class ScriptComponent;
+
+class ScriptEngine {
+public:
+    static ScriptEngine& Get();
+
+    void SetRuntime(IScriptRuntime* runtime);
+    IScriptRuntime* GetRuntime() const { return m_runtime; }
+
+    void OnRuntimeStart(Components::Scene* scene);
+    void OnRuntimeStop();
+
+    void OnFixedUpdate(float fixedDeltaTime);
+    void OnUpdate(float deltaTime);
+    void OnLateUpdate(float deltaTime);
+
+    void OnScriptComponentEnabled(ScriptComponent* component);
+    void OnScriptComponentDisabled(ScriptComponent* component);
+    void OnScriptComponentDestroyed(ScriptComponent* component);
+
+    bool IsRuntimeRunning() const { return m_runtimeRunning; }
+    Components::Scene* GetRuntimeScene() const { return m_runtimeScene; }
+
+    bool HasTrackedScriptComponent(const ScriptComponent* component) const;
+    bool HasRuntimeInstance(const ScriptComponent* component) const;
+    size_t GetTrackedScriptCount() const { return m_scriptOrder.size(); }
+
+private:
+    struct ScriptInstanceKey {
+        uint64_t gameObjectUUID = 0;
+        uint64_t scriptComponentUUID = 0;
+
+        bool operator==(const ScriptInstanceKey& other) const {
+            return gameObjectUUID == other.gameObjectUUID
+                && scriptComponentUUID == other.scriptComponentUUID;
+        }
+    };
+
+    struct ScriptInstanceKeyHasher {
+        size_t operator()(const ScriptInstanceKey& key) const;
+    };
+
+    struct ScriptInstanceState {
+        ScriptRuntimeContext context;
+        bool instanceCreated = false;
+        bool awakeCalled = false;
+        bool enabled = false;
+        bool startCalled = false;
+        bool startPending = false;
+    };
+
+    ScriptEngine() = default;
+
+    void CollectScriptComponents(Components::GameObject* gameObject);
+    ScriptInstanceState* TrackScriptComponent(ScriptComponent* component);
+    ScriptInstanceState* FindState(const ScriptComponent* component);
+    const ScriptInstanceState* FindState(const ScriptComponent* component) const;
+    void RemoveTrackedScriptComponent(const ScriptComponent* component);
+
+    bool ShouldScriptRun(const ScriptInstanceState& state) const;
+    bool EnsureScriptReady(ScriptInstanceState& state, bool invokeEnableIfNeeded);
+    void InvokeLifecycleMethod(ScriptInstanceState& state, ScriptLifecycleMethod method, float deltaTime = 0.0f);
+    void StopTrackingScript(ScriptInstanceState& state, bool runtimeStopping);
+
+    NullScriptRuntime m_nullRuntime;
+    IScriptRuntime* m_runtime = &m_nullRuntime;
+    Components::Scene* m_runtimeScene = nullptr;
+    bool m_runtimeRunning = false;
+
+    std::unordered_map<ScriptInstanceKey, ScriptInstanceState, ScriptInstanceKeyHasher> m_scriptStates;
+    std::vector<ScriptInstanceKey> m_scriptOrder;
+};
+
+} // namespace Scripting
+} // namespace XCEngine