/**
 * Copyright (c) 2025 Dominic Masters
 * 
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#include "cutscenesystem.h"
#include "util/memory.h"

cutscenesystem_t CUTSCENE_SYSTEM;

void cutsceneSystemInit() {
  memoryZero(&CUTSCENE_SYSTEM, sizeof(cutscenesystem_t));
}

void cutsceneSystemStartCutscene(const cutscene_t *cutscene) {
  CUTSCENE_SYSTEM.scene = cutscene;
  CUTSCENE_SYSTEM.mode = CUTSCENE_MODE_INITIAL;
  CUTSCENE_SYSTEM.currentItem = 0xFF;// Set to 0xFF so start wraps.
  cutsceneSystemNext();
}

void cutsceneSystemUpdate() {
  if(CUTSCENE_SYSTEM.scene == NULL) return;

  const cutsceneitem_t *item = cutsceneSystemGetCurrentItem();
  cutsceneItemUpdate(item, &CUTSCENE_SYSTEM.data);
}

void cutsceneSystemNext() {
  if(CUTSCENE_SYSTEM.scene == NULL) return;

  CUTSCENE_SYSTEM.currentItem++;

  // End of the cutscene?
  if(
    CUTSCENE_SYSTEM.currentItem >= CUTSCENE_SYSTEM.scene->itemCount
  ) {
    CUTSCENE_SYSTEM.scene = NULL;
    CUTSCENE_SYSTEM.currentItem = 0xFF;
    CUTSCENE_SYSTEM.mode = CUTSCENE_MODE_NONE;
    return;
  }

  // Start item.
  const cutsceneitem_t *item = cutsceneSystemGetCurrentItem();
  memset(&CUTSCENE_SYSTEM.data, 0, sizeof(CUTSCENE_SYSTEM.data));
  cutsceneItemStart(item, &CUTSCENE_SYSTEM.data);
}

const cutsceneitem_t * cutsceneSystemGetCurrentItem() {
  if(CUTSCENE_SYSTEM.scene == NULL) return NULL;

  return &CUTSCENE_SYSTEM.scene->items[CUTSCENE_SYSTEM.currentItem];
}