using GeometryTD.CustomEvent;
using GeometryTD.Definition;
using UnityGameFramework.Runtime;

namespace GeometryTD.UI
{
    public class EventFormUseCase : IUIUseCase
    {
        private EventItem m_CurrentEvent;

        public void SetCurrentEvent(EventItem eventItem)
        {
            m_CurrentEvent = eventItem;
        }

        public EventFormRawData CreateInitialModel()
        {
            if (m_CurrentEvent == null)
            {
                return null;
            }

            return new EventFormRawData
            {
                EventItem = m_CurrentEvent
            };
        }

        public EventOption SelectOption(int optionIndex)
        {
            if (m_CurrentEvent == null || m_CurrentEvent.Options == null)
            {
                return null;
            }

            if (optionIndex < 0 || optionIndex >= m_CurrentEvent.Options.Length)
            {
                Log.Warning("EventFormUseCase.SelectOption() option index is invalid: {0}", optionIndex);
                return null;
            }

            // TODO: 执行 Requirements 校验、CostEffects/RewardEffects 结算与后续节点推进。
            GameEntry.Event.Fire(this, NodeCompleteEventArgs.Create());
            return m_CurrentEvent.Options[optionIndex];
        }
    }
}