using System.Linq;
using BumpCombat.Constants;
using NUnit.Framework;
using UnityEditor;
using UnityEngine;

namespace BumpCombat.Tests
{
    public sealed class Defense25DMonsterPoolPrefabAssetTests
    {
        private const string PoolPath = "Assets/_Project/Constants/Defense25DComparison/MonsterPools.asset";
        private const string PrefabRoot = "Assets/_Project/Prefabs/Defense25DMonsters/Roster25D-v1/";

        [Test]
        public void EveryAllowedSpeciesHasADistinctVisualPrefabWithASprite()
        {
            GameObject existingPrefab = AssetDatabase.LoadAssetAtPath<GameObject>("Assets/_Project/Prefabs/Enemies/Slime.prefab");
            Assert.That(existingPrefab, Is.Not.Null, "The existing Slime prefab must load as the control asset.");
            Assert.That(PrefabUtility.IsPartOfPrefabAsset(existingPrefab), Is.True,
                $"The existing prefab control was not recognized: {AssetDatabase.GetAssetPath(existingPrefab)} / {PrefabUtility.GetPrefabAssetType(existingPrefab)}.");

            Defense25DMonsterPoolDefinition pool = AssetDatabase.LoadAssetAtPath<Defense25DMonsterPoolDefinition>(PoolPath);
            Assert.That(pool, Is.Not.Null, $"Missing pool asset at {PoolPath}.");

            Assert.That(pool.TryValidate(out string validationError), Is.True, validationError);
            var entries = pool.Tiers.SelectMany(tier => tier.Entries).ToArray();
            Assert.That(entries.Length, Is.EqualTo(28));
            Assert.That(entries.Select(entry => entry.VisualPrefab).All(prefab => prefab != null), Is.True);
            Assert.That(entries.Select(entry => entry.VisualPrefab).Distinct().Count(), Is.EqualTo(28));

            foreach (Defense25DMonsterPoolEntry entry in entries)
            {
                GameObject prefab = entry.VisualPrefab;
                string assetPath = AssetDatabase.GetAssetPath(prefab);
                GlobalObjectId globalId = GlobalObjectId.GetGlobalObjectIdSlow(prefab);
                string assetGuid = AssetDatabase.AssetPathToGUID(assetPath);
                TestContext.WriteLine($"{entry.EnemyDefinitionId}: path={assetPath}; globalObjectId={globalId}; prefabAsset={PrefabUtility.IsPartOfPrefabAsset(prefab)}");
                Assert.That(PrefabUtility.IsPartOfPrefabAsset(prefab), Is.True,
                    $"{entry.EnemyDefinitionId}: {assetPath} / {PrefabUtility.GetPrefabAssetType(prefab)} / persistent={EditorUtility.IsPersistent(prefab)} / {globalId}.");
                Assert.That(assetPath, Does.StartWith(PrefabRoot), entry.EnemyDefinitionId);
                Assert.That(globalId.ToString(), Does.Contain(assetGuid), $"GlobalObjectId doesn't identify the prefab asset for {entry.EnemyDefinitionId}.");

                SpriteRenderer renderer = prefab.GetComponent<SpriteRenderer>();
                Assert.That(renderer, Is.Not.Null, $"{entry.EnemyDefinitionId} prefab has no root SpriteRenderer.");
                Assert.That(renderer.sprite, Is.Not.Null, $"{entry.EnemyDefinitionId} prefab has no Idle sprite.");
            }
        }
    }
}