using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using VBXSE;

namespace TalkingIsAFreeAction
{
    public static class Textbox
    {
        public const float DEFAULT_TEXT_SPEED = 50;
        public const float QUICK_TEXT_SPEED = 400;
        public const int MAXIMUM_LENGTH = 184;

        public static Sprite textBox = null;
        public static GText gText = null;
        public static Sprite waitCursor = null;
        public static Sprite finalCursor = null;
        public static string printing = "";
        public static float printed = 0;
        public static float textSpeed = 20;
        public static bool finishedPrinting = false;
        public static bool textIsFinal = false;
        public static Microsoft.Xna.Framework.Audio.SoundEffectInstance talkSound = null;

        public static void Initialize()
        {
            textBox = SpriteEngine.CreateSprite("textbox");
            textBox.depth = -50;
            textBox.SetPosition(64, 24);
            textBox.positionLocked = true;
            textBox.enabled = false;
            
            gText = SpriteEngine.CreateGText("", 68, 28);
            gText.depth = -60;
            gText.color = Microsoft.Xna.Framework.Color.Black;
            gText.enabled = false;

            waitCursor = SpriteEngine.CreateMultiSprite(new string[] { "wait1", "wait2", "wait3", "wait4" }, (int)textBox.position.X + 180, (int)textBox.position.Y + 28, 1f);
            waitCursor.depth = -70;
            waitCursor.positionLocked = true;
            waitCursor.AddAnimation("waiting", new Animation("waiting", "wait1", 4, 200));
            waitCursor.currentAnimation = "waiting";
            waitCursor.enabled = false;

            finalCursor = SpriteEngine.CreateMultiSprite(new string[] { "final1", "final2", "final3", "final4" }, (int)textBox.position.X + 180, (int)textBox.position.Y + 28, 1f);
            finalCursor.depth = -71; //Just in case
            finalCursor.positionLocked = true;
            finalCursor.AddAnimation("finaling", new Animation("finaling", "final1", 4, 200));
            finalCursor.currentAnimation = "finaling";
            finalCursor.enabled = false;

            talkSound = Audio.PrepareSound("talk");
            talkSound.IsLooped = true;
        }

        public static void PrintText(string text, bool final = false)
        {
            printing = text;
            printed = 0;
            textBox.enabled = true;
            gText.enabled = true;
            waitCursor.enabled = false;
            finalCursor.enabled = false;
            finishedPrinting = false;
            textSpeed = DEFAULT_TEXT_SPEED;
            textIsFinal = final;

            //Word wrapping!
            if (SpriteEngine.spriteFont.MeasureString(text).X > MAXIMUM_LENGTH)
            {
                string[] words = text.Split(new string[] { " " }, StringSplitOptions.None);
                int numWords = words.Length;
                int currentLength = MAXIMUM_LENGTH + 1;
                while (currentLength > MAXIMUM_LENGTH)
                {
                    numWords--;
                    StringBuilder toTry = new StringBuilder();
                    for (int i = 0; i < numWords; i++)
                    {
                        toTry.Append(words[i]);
                        if(i < numWords - 1) toTry.Append(" ");
                    }
                    currentLength = Convert.ToInt32(SpriteEngine.spriteFont.MeasureString(toTry.ToString()).X);
                }

                StringBuilder finalText = new StringBuilder();
                for (int i = 0; i < numWords; i++)
                {
                    finalText.Append(words[i]);
                    finalText.Append(" ");
                }
                finalText.Append("\n");
                for (int i = numWords; i < words.Length; i++)
                {
                    finalText.Append(words[i]);
                    if (i < words.Length - 1) finalText.Append(" ");
                }
                printing = finalText.ToString();
            }
        }

        public static void Poke()
        {
            if (!finishedPrinting)
            {
                textSpeed = QUICK_TEXT_SPEED;
            }
            else
            {
                Main.FinishText();
            }
        }

        public static void Close()
        {
            printing = "";
            printed = 0;
            textBox.enabled = false;
            gText.enabled = false;
            gText.text = "";
            waitCursor.enabled = false;
            finalCursor.enabled = false;
        }

        public static void Update(float seconds)
        {
            if (printing == "") gText.text = "";
            else
            {
                if (printed < printing.Length)
                {
                    printed += textSpeed * seconds;
                    if (talkSound.State != Microsoft.Xna.Framework.Audio.SoundState.Playing)
                    {
                        talkSound.Play();
                    }
                }
                if (printed >= printing.Length)
                {
                    printed = printing.Length;
                    if (textIsFinal) finalCursor.enabled = true;
                    else waitCursor.enabled = true;
                    finishedPrinting = true;
                    if (talkSound.State == Microsoft.Xna.Framework.Audio.SoundState.Playing)
                    {
                        talkSound.Stop(true);
                    }
                }
                gText.text = printing.Substring(0, (int)Math.Floor(printed));
            }
        }
    }
}