From f5a0e762faff0feec61138f012c9216ee64b2f3a Mon Sep 17 00:00:00 2001
From: Lily Rose <lily@rose.place>
Date: Sun, 16 Feb 2025 20:05:37 +1100
Subject: [PATCH] Set up flecs

---
 main.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/main.c b/main.c
index c9a95c5..8218404 100644
--- a/main.c
+++ b/main.c
@@ -20,6 +20,7 @@ typedef struct app_state {
     SDL_Window *window;
     Clay_SDL3RendererData rendererData;
     ClayVideoDemo_Data demoData;
+    ecs_world_t *world;
 } AppState;
 
 SDL_Surface *sample_image;
@@ -92,14 +93,22 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[]) {
     SDL_GetWindowSize(state->window, &width, &height);
     Clay_Initialize(clayMemory, (Clay_Dimensions) { (float) width, (float) height }, (Clay_ErrorHandler) { HandleClayErrors });
     Clay_SetMeasureTextFunction(SDL_MeasureText, state->rendererData.fonts);
+    Clay_SetDebugModeEnabled(true);
 
     state->demoData = ClayVideoDemo_Initialize();
 
+    ecs_world_t *world = ecs_init();
+    ECS_IMPORT(world, FlecsStats);
+    ECS_IMPORT(world, FlecsScript);
+    ecs_singleton_set(world, EcsRest, {0}); // Creates REST server on default port (27750)
+    state->world = world;
+    
     *appstate = state;
     return SDL_APP_CONTINUE;
 }
 
 SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) {
+    AppState *state = appstate;
     SDL_AppResult ret_val = SDL_APP_CONTINUE;
 
     switch (event->type) {
@@ -119,10 +128,37 @@ SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) {
             Clay_UpdateScrollContainers(true, (Clay_Vector2) { event->wheel.x, event->wheel.y }, 0.01f);
             break;
         case SDL_EVENT_KEY_DOWN:
+            if (event->key.repeat) {
+                break;
+            }
             SDL_Log("Pressed key: %s\n", SDL_GetKeyName(event->key.key));
+            switch (event->key.scancode) {
+                case SDL_SCANCODE_LCTRL: {
+                    ecs_world_t *world = state->world;
+                    ecs_entity_t e = ecs_entity(world, { .name = "Lily" });
+                    SDL_Log("Spawned entity [%s]", ecs_get_name(world, e));
+                    break;
+                }
+                case SDL_SCANCODE_X: {
+                    ecs_world_t *world = state->world;
+                    ecs_entity_t e = ecs_new(world);
+                    SDL_Log("Spawned unnamed entity");
+                    break;
+                }
+            }
             break;
         case SDL_EVENT_KEY_UP:
             SDL_Log("Released key: %s\n", SDL_GetKeyName(event->key.key));
+            switch (event->key.scancode) {
+                case SDL_SCANCODE_LCTRL: {
+                    ecs_world_t *world = state->world;
+                    ecs_entity_t e = ecs_lookup(world, "Lily");
+                    SDL_Log("Entity [%s] is %s", ecs_get_name(world, e), ecs_is_alive(world, e) ? "alive" : "dead");
+                    ecs_delete(world, e);
+                    SDL_Log("Entity is %s", ecs_is_alive(world, e) ? "alive" : "dead");
+                    break;
+                }
+            }
             break;
         default:
             break;
@@ -134,6 +170,8 @@ SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) {
 SDL_AppResult SDL_AppIterate(void *appstate) {
     AppState *state = appstate;
 
+    ecs_progress(state->world, 0);
+
     Clay_RenderCommandArray render_commands = ClayVideoDemo_CreateLayout(&state->demoData);
 
     SDL_SetRenderDrawColor(state->rendererData.renderer, 0, 0, 0, 255);
@@ -173,6 +211,8 @@ void SDL_AppQuit(void *appstate, SDL_AppResult result) {
         if (state->rendererData.textEngine)
             TTF_DestroyRendererTextEngine(state->rendererData.textEngine);
 
+        ecs_fini(state->world);
+        
         SDL_free(state);
     }
     TTF_Quit();