using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System;
using System.IO;

#if UNITY_EDITOR
using UnityEditor;
#endif

namespace Gaia
{
    /// <summary>
    /// Class to cache the minimum - maximum physical height of a terrain
    /// </summary>
    [System.Serializable]
    public class TerrainMinMaxHeight
    {
        public string guid;
        public bool isWorldmap = false;
        public bool recalculate = false;
        public float min;
        public float max;
    }


    /// <summary>
    /// A wrapper for scriptable objects
    /// </summary>
    //[System.Serializable]
    //public class ScriptableObjectWrapper
    //{
    //    public string m_name;
    //    public string m_fileName;
    //    public byte[] m_content;

    //    /// <summary>
    //    /// Merge the file name with the sessioned file name
    //    /// </summary>
    //    /// <returns></returns>
    //    public string GetSessionedFileName(string sessionName)
    //    {
    //        return PWCommon3.Utils.FixFileName(sessionName) + "_" + Path.GetFileName(m_fileName);
    //    }

    //    /// <summary>
    //    /// Merge the file name with the sessioned file name
    //    /// </summary>
    //    /// <param name="sessionName">session file name</param>
    //    /// <param name="soFileName">scriptable object file name</param>
    //    /// <returns></returns>
    //    public static string GetSessionedFileName(string sessionName, string soFileName)
    //    {
    //        return PWCommon3.Utils.FixFileName(sessionName) + "_" + Path.GetFileName(soFileName);
    //    }

    //}

    /// <summary>
    /// A Gaia session - core data structure used to store sessions
    /// </summary>
    [System.Serializable]
    public class GaiaSession : ScriptableObject
    {
        /// <summary>
        /// Session name
        /// </summary>
        [TextArea(1,1)]
        public string m_name = string.Format("Session {0:yyyyMMdd-HHmmss}", DateTime.Now);

        /// <summary>
        /// 
        /// Session description
        /// </summary>
        [TextArea(3, 5)]
        public string m_description = "";

        [HideInInspector]
        public Texture2D m_previewImage;

        /// <summary>
        /// When the session was created
        /// </summary>
        public string m_dateCreated = DateTime.Now.ToString();

        /// <summary>
        /// The width of the terrain it was created with
        /// </summary>
        public int m_terrainWidth = 0;

        /// <summary>
        /// The depth of the terrain it was created with
        /// </summary>
        public int m_terrainDepth = 0;

        /// <summary>
        /// The height of the terrain it was created with
        /// </summary>
        public int m_terrainHeight = 0;

        /// <summary>
        /// The session sea level
        /// </summary>
        public float m_seaLevel = 0f;

        /// <summary>
        /// The session spawn Density value
        /// </summary>
        public float m_spawnDensity = 1f;

        /// <summary>
        /// Locked or not - if locked then no changes will be made to it
        /// </summary>
        public bool m_isLocked = false;

        /// <summary>
        /// The preview image for this session
        /// </summary>
        [HideInInspector]
        public byte [] m_previewImageBytes = new byte[0];

        /// <summary>
        /// Width of preview image if there is one
        /// </summary>
        [HideInInspector]
        public int m_previewImageWidth = 0;

        /// <summary>
        /// Height of preview image if there is one
        /// </summary>
        [HideInInspector]
        public int m_previewImageHeight = 0;

        /// <summary>
        /// The operations that this session is made up of
        /// </summary>
        [HideInInspector]
        public List<GaiaOperation> m_operations = new List<GaiaOperation>();

        /// <summary>
        /// The cache of min-max physical terrain heights
        /// </summary>
        [HideInInspector]
        public List<TerrainMinMaxHeight> m_terrainMinMaxCache = new List<TerrainMinMaxHeight>();

        /// <summary>
        /// The collision mask cache to compute collision information in the stamper / spawner
        /// </summary>
        [HideInInspector]
        public BakedMaskCacheEntry[] m_bakedMaskCacheEntries = new BakedMaskCacheEntry[0];

        /// <summary>
        /// Holds all terrain scenes in a multi-terrain scenario with exported terrains.
        /// </summary>
        //public List<TerrainScene> m_terrainScenes = new List<TerrainScene>();

        /// <summary>
        /// Store for the current world biome mask settings - required to bake the world biome mask in the spawner for the baked mask cache
        /// </summary>
        public SpawnerSettings m_worldBiomeMaskSettings;


        /// <summary>
        /// Get the session name as fixed file name without the extension
        /// </summary>
        /// <returns></returns>
        public string GetSessionFileName()
        {
            return PWCommon3.Utils.FixFileName(m_name);
        }

        /// <summary>
        /// Get the embedded preview image or null
        /// </summary>
        /// <returns>Embedded preview image or null</returns>
        public Texture2D GetPreviewImage()
        {
            if (m_previewImageBytes.GetLength(0) == 0)
            {
                return null;
            }

            Texture2D image = new Texture2D(m_previewImageWidth, m_previewImageHeight, TextureFormat.ARGB32, false);
            image.LoadRawTextureData(m_previewImageBytes);
            image.Apply();

            //Do a manual colour mod if in linear colour space
            #if UNITY_EDITOR
            if (PlayerSettings.colorSpace == ColorSpace.Linear)
            {
                Color[] pixels = image.GetPixels();
                for (int idx = 0; idx < pixels.GetLength(0); idx++)
                {
                    pixels[idx] = pixels[idx].gamma;
                }
                image.SetPixels(pixels);
                image.Apply();
            }
            #endif

            image.name = m_name;
            return image;
        }
    }
}