using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

namespace Crowdin.Plugin.Helpers
{
    using Models.Screenshot;
    using ScriptableObjects;

    public static class ScreenshotHelper
    {
        private const string FileName = "CrowdinScreenshots";
        private static readonly string ScreenshotsPath = $"Crowdin/{FileName}";
        private static readonly string FullScreenshotsPath = $"{FolderHelper.resourcesDirectory}/{FileName}.asset";

        private static CrowdinScreenshots Screenshots { get; set; }

        static ScreenshotHelper()
        {
            TryLoadScreenshots();
            if (Screenshots is null)
            {
                CreateScreenshotsAsset();
                TryLoadScreenshots();
            }
        }

        public static IEnumerable<ScreenshotData> GetScreenshots()
        {
            Screenshots.screenshotData ??= new List<ScreenshotData>();

            foreach (var screenshotData in Screenshots.screenshotData)
            {
                var texture = Resources.Load<Texture2D>($"Crowdin/Screenshots/{screenshotData.translationKey}");

                if (texture != null)
                    screenshotData.texture = texture;
            }

            Screenshots.screenshotData.RemoveAll(data => data.texture is null);

            return Screenshots.screenshotData;
        }

        public static void AddOrUpdateScreenshotByTranslationKey(string key, Texture2D texture2D)
        {
            if (Screenshots is null)
            {
                CreateScreenshotsAsset();
            }

            if (Screenshots is null)
            {
                return;
            }

            Screenshots.screenshotData ??= new List<ScreenshotData>();

            var findIndex = Screenshots.screenshotData.FindIndex(data => data.translationKey == key);

            if (findIndex == -1)
            {
                Screenshots.screenshotData.Add(new ScreenshotData
                {
                    name = $"{key}.png",
                    translationKey = key,
                    texture = texture2D
                });
            }
            else
            {
                Screenshots.screenshotData[findIndex].texture = texture2D;
            }
        }

        private static void CreateScreenshotsAsset()
        {
            var asset = ScriptableObject.CreateInstance<CrowdinScreenshots>();
            AssetDatabase.CreateAsset(asset, FullScreenshotsPath);
            AssetDatabase.SaveAssets();
            AssetDatabase.Refresh(ImportAssetOptions.ForceUpdate);
        }

        private static void TryLoadScreenshots()
        {
            Screenshots = Resources.Load<CrowdinScreenshots>(ScreenshotsPath);
            if (Screenshots is null)
            {
                return;
            }

            EditorUtility.SetDirty(Screenshots);
        }
    }
}