using System.IO;
using UnityEngine;

namespace Luneraria.View
{
    /// <summary>Renders a camera into a PNG (screenshots of tests and tools, also in batch mode).</summary>
    public static class LuneCapture
    {
        public static void Render(Camera camera, string file, int width = 1920, int height = 1080)
        {
            var target = new RenderTexture(width, height, 24, RenderTextureFormat.ARGB32) { antiAliasing = 4 };
            RenderTexture previous = camera.targetTexture;
            float aspect = camera.aspect;
            camera.aspect = (float)width / height;
            camera.targetTexture = target;
            camera.Render();
            RenderTexture.active = target;
            var image = new Texture2D(width, height, TextureFormat.RGB24, false);
            image.ReadPixels(new Rect(0, 0, width, height), 0, 0);
            image.Apply();
            Directory.CreateDirectory(Path.GetDirectoryName(file));
            File.WriteAllBytes(file, image.EncodeToPNG());
            RenderTexture.active = null;
            camera.targetTexture = previous;
            camera.aspect = aspect;
            Object.Destroy(target);
            Object.Destroy(image);
        }
    }
}