using System;
using System.Collections;
using System.Linq;
using Luneraria.Core;
using Luneraria.View;
using NUnit.Framework;
using UnityEngine;
using UnityEngine.TestTools;

namespace Luneraria.UI.Tests
{
    /// <summary>
    /// S4 in the real scene: the fog of war darkens the terrain outside the team's vision (light
    /// at the own base, dark at the enemy base), and a stunned unit shows the gold ring over its
    /// head. S4Bilder (explicit) captures both at 1920×1080; LUNE_EVIDENCE names the folder below
    /// docs/port/screenshots (default s4/spiel).
    /// </summary>
    public sealed class S4PolishViewsTests
    {
        static float AlphaAt(LuneFogOverlay fog, Vec2 point)
        {
            int side = Mathf.CeilToInt((float)(LuneMap.HalfExtent * 2.0) / LuneFogOverlay.Cell) + 1;
            int column = Mathf.Clamp(Mathf.RoundToInt((float)((point.X + LuneMap.HalfExtent) / LuneFogOverlay.Cell)), 0, side - 1);
            int row = Mathf.Clamp(Mathf.RoundToInt((float)((point.Y + LuneMap.HalfExtent) / LuneFogOverlay.Cell)), 0, side - 1);
            return fog.Alpha[row * side + column];
        }

        static IEnumerator Fight(HudSession s)
        {
            yield return s.Starter();
            s.Leave();
            s.Game.Key(KeyCode.Space);
            yield return HudSession.Frames(2);
            yield return s.Fight(4.0);
            yield return HudSession.Frames(4);
        }

        [UnityTest, Timeout(600000)]
        public IEnumerator S4Views()
        {
            var s = new HudSession();
            yield return s.Open(1920, 1080, seed: 4, startRound: 6, extraGold: 500, extended: true);
            yield return Fight(s);
            LuneFogOverlay fog = s.Game.View.Fog;
            Assert.IsNotNull(fog, "an extended match with a human seat has the fog overlay");
            Assert.IsTrue(fog.gameObject.activeSelf && fog.Refreshes > 0, "the fog is active and refreshed");
            Assert.Less(AlphaAt(fog, s.Match.Map.CorePosition(0)), .05f, "the own Ancient stands in light");
            Assert.Greater(AlphaAt(fog, s.Match.Map.CorePosition(1)), .5f, "the enemy Ancient lies in the fog");
            LuneUnit victim = s.Match.Combat.Units.First(u => u.IsMobile() && u.Alive && u.Team == 0);
            victim.ApplyEffect("valkyrie_stun", "stun", 1.0, 3.0);
            yield return HudSession.Frames(3);
            LuneUnitView view = UnityEngine.Object.FindObjectsByType<LuneUnitView>(FindObjectsSortMode.None).First(v => v.Unit == victim);
            Transform ring = view.transform.Find("StunRing");
            Assert.IsTrue(ring != null && ring.gameObject.activeSelf, "a stunned unit shows the stun ring");
            s.Close();
            var reference = new HudSession();
            yield return reference.Open(1920, 1080, seed: 4, startRound: 6, extraGold: 500);
            yield return Fight(reference);
            Assert.IsTrue(reference.Game.View.Fog == null || !reference.Game.View.Fog.gameObject.activeSelf, "no fog under the reference rules");
            reference.Close();
        }

        [UnityTest, Timeout(600000), Explicit("Bildwerkzeug: nur gezielt per -testFilter")]
        public IEnumerator S4Bilder()
        {
            string evidence = Environment.GetEnvironmentVariable("LUNE_EVIDENCE");
            string folder = "docs/port/screenshots/" + (string.IsNullOrEmpty(evidence) ? "s4/spiel" : evidence) + "/";
            var s = new HudSession();
            yield return s.Open(1920, 1080, seed: 4, startRound: 6, extraGold: 500, extended: true);
            yield return Fight(s);
            s.Driver.Paused = true;
            s.Rig.LookAt(new Vec2(0.0, 0.0), 60f, true);
            yield return new WaitForSecondsRealtime(.6f);
            yield return s.Shot(folder + "01-nebel-uebersicht.png");
            LuneUnit front = s.Match.Combat.Units.Where(u => u.IsMobile() && u.Alive && u.Team == 0 && u.Lane == "mid").OrderByDescending(u => u.Progress).First();
            s.Rig.LookAt(front.Position, 22f, true);
            yield return new WaitForSecondsRealtime(.5f);
            yield return s.Shot(folder + "02-nebelgrenze-mid.png");
            foreach (LuneUnit unit in s.Match.Combat.Units.Where(u => u.IsMobile() && u.Alive && u.Position.DistanceTo(front.Position) < 6.0))
                unit.ApplyEffect("valkyrie_stun", "stun", 1.0, 10.0);
            s.Rig.LookAt(front.Position, 9f, true);
            yield return new WaitForSecondsRealtime(.6f);
            yield return s.Shot(folder + "03-betaeubung.png");
            s.Close();
        }
    }
}