using System;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using HotUpdate.Gameplay;
using Newtonsoft.Json;
using UnityEditor;
using UnityEditor.SceneManagement;
using UnityEngine;
using UnityEngine.UI;

public static class VerifyMainMenuMusic
{
    public static string Preflight()
    {
        var scene = UnityEngine.SceneManagement.SceneManager.GetActiveScene();
        return JsonConvert.SerializeObject(new { scene.path, scene.isDirty,
            scenes = Enumerable.Range(0, UnityEngine.SceneManagement.SceneManager.sceneCount)
                .Select(i => UnityEngine.SceneManagement.SceneManager.GetSceneAt(i))
                .Select(s => new { s.path, s.isDirty }).ToArray() });
    }

    public static string PrepareBoot()
    {
        var previous = EditorSceneManager.playModeStartScene;
        SessionState.SetString("AIGame.Music.PreviousPlayScene", previous == null ? "" : AssetDatabase.GetAssetPath(previous));
        EditorSceneManager.playModeStartScene = AssetDatabase.LoadAssetAtPath<SceneAsset>("Assets/Scenes/Boot.unity");
        return "Boot selected for Play Mode only; existing edit scenes preserved: " + Preflight();
    }

    public static string RestoreScenes()
    {
        Check(!EditorApplication.isPlaying, "Exit Play Mode before restore");
        string path = SessionState.GetString("AIGame.Music.PreviousPlayScene", "");
        EditorSceneManager.playModeStartScene = string.IsNullOrEmpty(path) ? null : AssetDatabase.LoadAssetAtPath<SceneAsset>(path);
        SessionState.EraseString("AIGame.Music.PreviousPlayScene");
        return Preflight();
    }

    static void Check(bool ok, string message) { if (!ok) throw new Exception(message); }
    static async Task Until(Func<bool> condition, string message, int seconds = 25)
    {
        var deadline = DateTime.UtcNow.AddSeconds(seconds);
        while (!condition())
        {
            Check(DateTime.UtcNow < deadline, message);
            await Task.Delay(100);
        }
    }

    public static async Task<string> Play()
    {
        Check(EditorApplication.isPlaying, "Play Mode required");
        const string musicKey = "AIGame.Settings.music", sfxKey = "AIGame.Settings.sfx";
        bool hadMusic = PlayerPrefs.HasKey(musicKey), hadSfx = PlayerPrefs.HasKey(sfxKey);
        int musicValue = PlayerPrefs.GetInt(musicKey, 1), sfxValue = PlayerPrefs.GetInt(sfxKey, 1);
        float listenerVolume = AudioListener.volume;
        PrototypeFlow flow = null;
        try
        {
            await Until(() => UnityEngine.Object.FindObjectOfType<MainMenuMusic>() != null, "Music not loaded by bootstrap");
            var music = UnityEngine.Object.FindObjectOfType<MainMenuMusic>();
            var source = music.Source;
            Check(source != null && source.clip.name == "MeadowBreeze_MainMenu_Loop", "Wrong selected song");
            Check(source.loop && !source.playOnAwake && source.spatialBlend == 0, "Invalid authored audio source");
            PrototypeClientPrefs.Music = true;
            PrototypeClientPrefs.Sfx = true;
            await Until(() => source.isPlaying, "Main menu music did not start");
            float before = source.time;
            await Task.Delay(300);
            Check(source.time > before, "Playback samples did not advance");
            flow = UnityEngine.Object.FindObjectOfType<PrototypeFlow>();
            await Until(() => flow != null && flow.Game != null && !flow.IsBusy, "Gameplay not ready for navigation");
            flow.Handle("Home");
            for (int i = 0; i < 3; i++)
            {
                before = source.time;
                flow.Handle("Settings");
                await Until(() => flow.Page == "UI_PrototypeSettings", "Settings did not open");
                Check(source.isPlaying && source.time >= before - 0.1f, "Opening settings restarted or stopped music");
                var button = UnityEngine.Object.FindObjectsOfType<Button>().Single(b => b.name == "Btn_ToggleMusic");
                button.onClick.Invoke();
                await Task.Delay(100);
                Check(!PrototypeClientPrefs.Music && !source.isPlaying && PrototypeClientPrefs.Sfx, "Music off did not pause independently of SFX");
                float pausedAt = source.time;
                await Task.Delay(180);
                Check(Math.Abs(source.time - pausedAt) < 0.05f, "Muted music kept advancing");
                button.onClick.Invoke();
                await Until(() => source.isPlaying, "Music toggle did not resume");
                Check(source.time >= pausedAt - 0.1f, "Music toggle restarted the song");
                flow.Handle("Home");
                await Until(() => flow.Page == "Home", "Did not return home");
                Check(UnityEngine.Object.FindObjectsOfType<MainMenuMusic>().Length == 1, "Duplicate music player");
            }
            PrototypeClientPrefs.Sfx = false;
            Check(source.isPlaying && AudioListener.volume > 0, "SFX off muted enabled music");
            PrototypeClientPrefs.Music = false;
            Check(!source.isPlaying && AudioListener.volume == 0, "Both audio channels off failed");
            PrototypeClientPrefs.Music = true;
            await Until(() => source.isPlaying, "Music on with SFX off failed");

            flow.Handle("Pinball");
            await Until(() => flow.Page == "UI_PrototypePinball", "Pinball did not open");
            Check(!source.isPlaying, "Camp music continued in pinball gameplay");
            PrototypeClientPrefs.Music = false;
            PrototypeClientPrefs.Music = true;
            Check(!source.isPlaying, "Preference change resumed music in gameplay");
            flow.Handle("Home");
            await Until(() => source.isPlaying, "Returning home did not resume music");

            // Exercise the battle playback gate without starting a server battle.
            music.SetInMenu(false);
            Check(!source.isPlaying, "Gameplay playback gate failed");
            music.SetInMenu(true);
            await Until(() => source.isPlaying, "Menu playback gate did not resume");
            music.SendMessage("OnApplicationPause", true);
            Check(!source.isPlaying, "Background pause did not pause music");
            music.SendMessage("OnApplicationPause", false);
            await Until(() => source.isPlaying, "Foreground resume failed");

            source.time = source.clip.length - 0.35f;
            await Until(() => source.isPlaying && source.time < 2, "Clip did not loop", 5);
            var report = new {
                result = "PASS", selected = source.clip.name, source.clip.length,
                startup = true, settingsToggleCycles = 3, resumesWithoutRestart = true,
                independentSfxToggle = true, singlePlayer = true, pinballPauseAndReturn = true,
                gameplayGate = true, applicationPauseAndResume = true, loopWrap = true,
                preferencesRestoredInFinally = true, verifiedUtc = DateTime.UtcNow.ToString("o")
            };
            string json = JsonConvert.SerializeObject(report, Formatting.Indented);
            string repo = Directory.GetParent(Application.dataPath).Parent.FullName;
            File.WriteAllText(Path.Combine(repo, "Doc/Design/Sound/MainMenuSoft/playback_validation.json"), json);
            return json;
        }
        finally
        {
            if (hadMusic) PlayerPrefs.SetInt(musicKey, musicValue); else PlayerPrefs.DeleteKey(musicKey);
            if (hadSfx) PlayerPrefs.SetInt(sfxKey, sfxValue); else PlayerPrefs.DeleteKey(sfxKey);
            PlayerPrefs.Save();
            PrototypeClientPrefs.Apply();
            AudioListener.volume = listenerVolume;
            if (flow != null) flow.Handle("Home");
        }
    }
}