using System.Collections;
using System.Collections.Generic;
using System.IO;
using Luneraria.Core;
using Luneraria.View;
using NUnit.Framework;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.TestTools;

namespace Luneraria.UI.Tests
{
    /// <summary>
    /// U3B: the HUD on a real match in the G1 scene, rendered over the camera image at 1920×1080
    /// (tools/out/hud-*.png). First look at layout, fonts, plates and portraits against the G3
    /// screenshots.
    /// </summary>
    public sealed class HudCaptureTests
    {
        public static string Root { get { return Path.GetDirectoryName(Application.dataPath); } }

        public static LuneUiAssets Assets()
        {
#if UNITY_EDITOR
            return UnityEditor.AssetDatabase.LoadAssetAtPath<LuneUiAssets>("Assets/Luneraria/Settings/LuneUi.asset");
#else
            return null;
#endif
        }

        /// <summary>The G1 scene with its match running at once, without the start screen.</summary>
        public static IEnumerator LoadScene()
        {
            LuneMatchDriver.DirectStart = true;
            AsyncOperation loading = SceneManager.LoadSceneAsync("G1_Map", LoadSceneMode.Single);
            while (!loading.isDone)
                yield return null;
            yield return null;
        }

        /// <summary>Composes the camera image and the HUD texture and writes a PNG.</summary>
        public static void Capture(LuneHud hud, RenderTexture target, string file)
        {
            LunePortraits.Shared?.Flush();
            Texture2D scene = LuneHudCapture.RenderScene(Camera.main, target.width, target.height);
            Texture2D overlay = LuneHudCapture.Read(target);
            Texture2D image = LuneHudCapture.Compose(scene, overlay);
            LuneHudCapture.Save(image, file);
            Object.Destroy(scene);
            Object.Destroy(overlay);
            Object.Destroy(image);
        }

        [UnityTest]
        [Timeout(600000)]
        public IEnumerator PlanningHudOverTheScene()
        {
            LunePreferences.ResetSession();
            yield return LoadScene();
            var driver = Object.FindAnyObjectByType<LuneMatchDriver>();
            var view = Object.FindAnyObjectByType<LuneMatchView>();
            var rig = Object.FindAnyObjectByType<LuneCameraRig>();
            driver.HumanSlot = 1;
            driver.Seed = 4;
            driver.Restart();
            LuneMatch match = driver.Runner.Match;
            Player me = match.Players[1];
            List<string> ids = match.BaseIds(me.Bund);
            foreach (int index in new[] { 1, 0, 2 })
                Assert.IsTrue(match.Submit(1, Command.Buy(ids[index])).Ok);
            var target = new RenderTexture(1920, 1080, 0, RenderTextureFormat.ARGB32);
            var hud = new GameObject("Hud").AddComponent<LuneHud>();
            hud.Init(match, 1, view.Library, Assets(), target);
            Vec2 point = match.Map.LanePoint(me.Team, me.Lane, match.Map.LanePaths[me.Lane].Length * .2);
            rig.LookAt(point, LuneCameraMath.DefaultZoom, true);
            for (int frame = 0; frame < 30; frame++)
            {
                if (frame == 10)
                    LunePortraits.Shared.Flush();
                yield return null;
            }
            Capture(hud, target, Path.Combine(Root, "tools/out/hud-planung-1920.png"));
            Debug.Log("LUNE_HUD syncs " + hud.Syncs + " sync ms " + hud.SyncMs.ToString("0.000") + " portraits " + LunePortraits.Shared.Rendered + " scale " + hud.UiScale + " size " + hud.LogicalSize);
            foreach (KeyValuePair<string, Rect> region in hud.Regions())
                Debug.Log("LUNE_HUD region " + region.Key + " " + region.Value);
            Assert.Greater(hud.Syncs, 0);
            Object.Destroy(hud.gameObject);
            target.Release();
        }
    }
}