// Copyright (c) Pixel Crushers. All rights reserved.

using UnityEngine;

namespace PixelCrushers.DialogueSystem
{

    /// <summary>
    /// Provides AutoPlay and SkipAll functionality. To add "Auto Play" and/or 
    /// "Skip All" buttons that advances the current conversation:
    /// 
    /// - Add this script to the dialogue UI.
    /// - Add Auto Play and/or Skip All buttons to your subtitle panel(s). Configure 
    /// their OnClick() events to call the dialogue UI's ConversationControl.ToggleAutoPlay 
    /// and/or ConversationControl.SkipAll methods.
    /// </summary>
    [AddComponentMenu("")] // Use wrapper.
    public class ConversationControl : MonoBehaviour // Add to dialogue UI. Connect to Skip All and Auto Play buttons.
    {
        [Tooltip("Skip all subtitles until response menu or end of conversation is reached. Set by SkipAll().")]
        public bool skipAll;

        [Tooltip("Stop SkipAll() when response menu is reached.")]
        public bool stopSkipAllOnResponseMenu = true;

        [Tooltip("Stop SkipAll() when end of conversation is reached.")]
        public bool stopSkipAllOnConversationEnd;

        [Tooltip("If Skip All is enabled, don't skip last conversation line.")]
        public bool dontSkipAllOnLastConversationLine;

        protected AbstractDialogueUI dialogueUI;

        protected virtual void Awake()
        {
            dialogueUI =
                GetComponent<AbstractDialogueUI>() ??
                (DialogueManager.standardDialogueUI as AbstractDialogueUI) ??
                GameObjectUtility.FindFirstObjectByType<AbstractDialogueUI>();
        }

        /// <summary>
        /// Toggles continue button mode between Always and Never.
        /// </summary>
        public virtual void ToggleAutoPlay()
        {
            var mode = DialogueManager.displaySettings.subtitleSettings.continueButton;
            var newMode = (mode == DisplaySettings.SubtitleSettings.ContinueButtonMode.Never) ? DisplaySettings.SubtitleSettings.ContinueButtonMode.Always : DisplaySettings.SubtitleSettings.ContinueButtonMode.Never;
            DialogueManager.displaySettings.subtitleSettings.continueButton = newMode;
            if (newMode == DisplaySettings.SubtitleSettings.ContinueButtonMode.Never) dialogueUI.OnContinueConversation();
        }

        /// <summary>
        /// Skips all subtitles until response menu or end of conversation is reached.
        /// </summary>
        public virtual void SkipAll()
        {
            skipAll = true;
            if (dialogueUI != null) dialogueUI.OnContinueConversation();
        }

        public virtual void StopSkipAll()
        {
            skipAll = false;
        }

        public virtual void OnConversationLine(Subtitle subtitle)
        {
            if (skipAll)
            {
                if (!dontSkipAllOnLastConversationLine ||
                    DialogueManager.currentConversationState.hasAnyResponses)
                {
                    subtitle.sequence = "Continue(); " + subtitle.sequence;
                }
            }
        }

        public virtual void OnConversationResponseMenu(Response[] responses)
        {
            if (skipAll)
            {
                if (stopSkipAllOnResponseMenu) skipAll = false;
                if (dialogueUI != null) dialogueUI.ShowSubtitle(DialogueManager.currentConversationState.subtitle);
            }
        }

        public virtual void OnConversationEnd(Transform actor)
        {
            if (stopSkipAllOnConversationEnd) skipAll = false;
        }

    }
}