using System;
using AibisDream.Utility;
using Yarn.Unity;

namespace AibisDream
{
    public class CommandOptionView : DialogueViewBase
    {
        // 进入指令选项模式
        private bool _waitCommandOptions;
        private string _commandName;

        public override void RunLine(LocalizedLine dialogueLine, Action onDialogueLineFinished)
        {
            ProcessCommandLine(dialogueLine, onDialogueLineFinished);
        }

        public override void RunOptions(DialogueOption[] dialogueOptions, Action<int> onOptionSelected)
        {
            // 非指令直接跳过
            if (!_waitCommandOptions)
            {
                base.RunOptions(dialogueOptions, onOptionSelected);
                return;
            }

            DialogController.Instance.IsTalking = false;
            // 传输选项
            YarnOption[] options = YarnOption.GeneOptions(dialogueOptions, onOptionSelected);
            DialogController.Instance.InvokeOptionCommand(_commandName, options);
        }

        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()
        {
            base.UserRequestedViewAdvancement();
        }

        private void ProcessCommandLine(LocalizedLine dialogueLine, Action onDialogueLineFinished)
        {
            // 判断当前行是否是Command行，否则直接跳过
            CommandLineType commandLineType = dialogueLine.Text.MatchCommandType();

            // 分情况处理
            switch (commandLineType)
            {
                case CommandLineType.Pause:
                    // 获取选项名称
                    dialogueLine.Text.TryGetPauseCommandAttr(out var pauseCommandName);
                    // 传递暂停指令
                    var step = YarnContinueStep.GeneContinueStep(onDialogueLineFinished);
                    DialogController.Instance.InvokePauseCommand(pauseCommandName, step);
                    break;
                case CommandLineType.OptionCommand:
                    // 选项指令
                    _waitCommandOptions = true;
                
                    dialogueLine.Text.TryGetOptionCommandAttr(out var curCommandName);
                    // 保存指令
                    _commandName = curCommandName;
                    // 进入下一步
                    onDialogueLineFinished.Invoke();
                    break;
                case CommandLineType.NonCommand:
                default:
                    // 非Command直接跳过
                    _waitCommandOptions = false;
                    base.RunLine(dialogueLine, onDialogueLineFinished);
                    break;
            }
        }
    }
}