using BumpCombat.Core;
using System.Reflection;
using BumpCombat.Player;
using BumpCombat.Progression;
using NUnit.Framework;
using UnityEngine;

namespace BumpCombat.Tests
{
    public sealed class ExperienceSystemTests
    {
        [TestCase(1, 10)]
        [TestCase(2, 15)]
        [TestCase(3, 20)]
        [TestCase(10, 55)]
        public void RequiredExperienceForLevel_UsesWorkOrderFormula(int level, int expected)
        {
            Assert.That(ExperienceSystem.RequiredExperienceForLevel(level), Is.EqualTo(expected));
        }

        [Test]
        public void AddExperience_UsesPlayerStatsExperienceGain()
        {
            GameObject owner = new("ExperienceSystem Tests");
            try
            {
                PlayerStats stats = owner.AddComponent<PlayerStats>();
                ExperienceSystem experience = owner.AddComponent<ExperienceSystem>();
                typeof(ExperienceSystem)
                    .GetMethod(
                        "Awake",
                        BindingFlags.Instance | BindingFlags.NonPublic)
                    ?.Invoke(experience, null);
                stats.AddModifier(new StatModifier(
                    "experience-increased",
                    CharacterStat.ExperienceGain,
                    ModifierOperation.Increased,
                    0.1f));

                for (int i = 0; i < 10; i++)
                {
                    experience.AddExperience(1);
                }

                Assert.That(experience.Level, Is.EqualTo(2));
                Assert.That(experience.CurrentExperience, Is.EqualTo(1));
            }
            finally
            {
                Object.DestroyImmediate(owner);
            }
        }
    }
}