using System;
using System.Linq;
using Yarn.Unity;

namespace AibisDream
{
    public class LineView : DialogueViewBase
    {
        private const string AutoNext = "auto_next";
        
        // 进入指令选项模式
        private bool _isInCommand;

        public override void RunLine(LocalizedLine dialogueLine, Action onDialogueLineFinished)
        {
            _isInCommand = dialogueLine.Text.HasCommandAttr();

            if (_isInCommand)
            {
                DialogUiViewer.Instance.HideDialog();
                base.RunLine(dialogueLine, onDialogueLineFinished);
                return;
            }
            
            HandleLineOutput(dialogueLine, onDialogueLineFinished);

            if (DialogController.Instance.quickRunMode)
            {
                onDialogueLineFinished.Invoke();
            }
        }

        private void HandleLineOutput(LocalizedLine dialogueLine, Action onDialogueLineFinished)
        {
            // 对话系统正在交谈状态
            DialogController.Instance.IsTalking = true;
            
            // 解析LocalizedLine
            if (dialogueLine.Metadata != null && dialogueLine.Metadata.Contains(AutoNext))
            {
                // 自动跳过
                DialogUiViewer.Instance.ShowAutoLine(dialogueLine.TextWithoutCharacterName.Text,
                    dialogueLine.CharacterName, onDialogueLineFinished);
            }
            else
            {
                // 需要玩家点击
                DialogUiViewer.Instance.ShowLine(dialogueLine.TextWithoutCharacterName.Text,
                    dialogueLine.CharacterName, onDialogueLineFinished);
            }
        }

        public override void RunOptions(DialogueOption[] dialogueOptions, Action<int> onOptionSelected)
        {
            if (_isInCommand)
            {
                DialogUiViewer.Instance.HideDialog();
                base.RunOptions(dialogueOptions, onOptionSelected);
                return;
            }

            DialogController.Instance.IsTalking = true;
            DialogUiViewer.Instance.ShowOptions(dialogueOptions, onOptionSelected);
        }

        public override void InterruptLine(LocalizedLine dialogueLine, Action onDialogueLineFinished)
        {
            base.InterruptLine(dialogueLine, onDialogueLineFinished);
        }

        public override void DismissLine(Action onDismissalComplete)
        {
            base.DismissLine(onDismissalComplete);
        }

        public override void UserRequestedViewAdvancement()
        {
            if (_isInCommand)
            {
                return;
            }
            
            if (!DialogUiViewer.Instance.TrySkipLine())
            {
                DialogUiViewer.Instance.AfterEndLine();
                requestInterrupt.Invoke();
            }
        }
    }
}