using System;
using System.IO;
using System.Linq;
using UnityEditor;
using UnityEditor.SceneManagement;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;
using DepthsOfGreed.HandbookUI;

[InitializeOnLoad]
public static class SupplyBasementValidation
{
    static SupplyBasementValidation(){if(SessionState.GetBool("SupplyValidate",false))EditorApplication.playModeStateChanged+=Ready;}
    public static void Validate()
    {
        EditorSceneManager.OpenScene("Assets/Scenes/Tim_Test_UI.unity");
        SessionState.SetBool("SupplyValidate",true);EditorApplication.playModeStateChanged+=Ready;EditorApplication.EnterPlaymode();
    }
    static void Ready(PlayModeStateChange state)
    {
        if(state!=PlayModeStateChange.EnteredPlayMode)return;
        SessionState.SetBool("SupplyValidate",false);EditorApplication.playModeStateChanged-=Ready;
        double due=EditorApplication.timeSinceStartup+1;int stage=0;SupplyBasementController c=null;int count=0;long first=0;Vector3 bookScale=Vector3.one;
        EditorApplication.CallbackFunction run=null;run=()=>
        {
            if(EditorApplication.timeSinceStartup<due)return;
            try
            {
                if(stage==0)
                {
                    c=UnityEngine.Object.FindFirstObjectByType<SupplyBasementController>();
                    Assert(c && c.connectionButtons.Length==8 && c.priorityButtons.Length==3,"Authored references");
                    Assert(!c.basementView.activeSelf && c.handbookRoot.activeSelf,"Starts on tower floor");
                    count=Count(c);bookScale=c.handbook.transform.Find("OpenBook").localScale;
                    var catalog=AssetDatabase.LoadAssetAtPath<HandbookTowerCatalog>("Assets/HandbookData/TestTurmkatalog.asset");
                    var result=c.placement.Backend.ExecuteBuild(new BuildRequest(catalog.towers.First(t=>t.id=="ammo_0"),new Vector3(3.5f,0,0)));
                    Assert(result.Allowed,"Test tower build");first=c.placement.Backend.BuiltObjects.Last().instanceId;
                    c.UseLift();c.UseLift();stage=1;due=EditorApplication.timeSinceStartup+1.7;
                }
                else if(stage==1)
                {
                    Assert(c.IsInBasement && !c.IsTravelling && c.basementView.activeSelf && c.handbookVisibility.alpha==0,"Lift arrival");
                    Assert(c.handbookRoot.activeSelf && c.placement.isActiveAndEnabled,"Backend keeps updating in basement");
                    Assert(c.connectionButtons[0].interactable && c.IsConnectionEnabled(first),"Automatic connection");
                    c.ToggleConnection(0);Assert(!c.IsConnectionEnabled(first),"Disconnect");
                    c.ToggleConnection(0);Assert(c.IsConnectionEnabled(first),"Reconnect");
                    c.SetPriority(1);Assert(c.Priority==1,"Set priority");
                    c.SetPriority(1);Assert(c.Priority==-1,"Return to automatic priority");
                    // Force both travel directions independently of the loading pause.
                    var pause=typeof(SupplyBasementController).GetField("truckPauseUntil",System.Reflection.BindingFlags.Instance|System.Reflection.BindingFlags.NonPublic);
                    var truckPosition=c.truck.anchoredPosition;
                    pause.SetValue(c,0f);c.truck.anchoredPosition=new Vector2(10000,truckPosition.y);c.SendMessage("Update");
                    Assert(c.truck.localScale.x<0,"Truck faces left while driving left");
                    pause.SetValue(c,0f);c.truck.anchoredPosition=new Vector2(-10000,truckPosition.y);c.SendMessage("Update");
                    Assert(c.truck.localScale.x>0,"Truck faces right while driving right");
                    c.truck.anchoredPosition=truckPosition;
                    Assert(c.placement.Backend.BuiltObjects.Count==1,"No duplicate towers");
                    if (SystemInfo.graphicsDeviceType != GraphicsDeviceType.Null && Environment.GetCommandLineArgs().Contains("-captureSupplyPreview")) Capture(c);
                    Assert(Count(c)==count,"No generated room UI");
                    c.UseLift();stage=2;due=EditorApplication.timeSinceStartup+1.7;
                }
                else
                {
                    Assert(!c.IsInBasement && !c.IsTravelling && c.handbookRoot.activeSelf && c.handbookVisibility.alpha==1,"Return to tower");
                    Assert(c.handbook.transform.Find("OpenBook").localScale==bookScale,"Book scale preserved");
                    Assert(c.placement.Backend.BuiltObjects.Count==1,"Tower retained across trip");
                    Assert(Count(c)==count,"No UI created on second trip");
                    Debug.Log("SUPPLY_BASEMENT_RUNTIME_OK: native hierarchy, auto connection, toggle, priority, two-way lift and preserved book layout.");
                    EditorApplication.update-=run;EditorApplication.Exit(0);
                }
            }
            catch(Exception e){EditorApplication.update-=run;Debug.LogException(e);EditorApplication.Exit(1);}
        };EditorApplication.update+=run;
    }
    static int Count(SupplyBasementController c)=>c.GetComponentInParent<Canvas>().GetComponentsInChildren<RectTransform>(true).Count(t=>!t.name.StartsWith("TMP"));
    static void Assert(bool condition,string message){if(!condition)throw new Exception(message);}
    static void Capture(SupplyBasementController c)
    {
        var camera=Camera.main;var canvas=c.GetComponentInParent<Canvas>();
        var rt=new RenderTexture(1920,1080,24);rt.Create();camera.targetTexture=rt;camera.aspect=1920f/1080;
        canvas.renderMode=RenderMode.ScreenSpaceCamera;canvas.worldCamera=camera;canvas.planeDistance=1;canvas.sortingOrder=200;
        Canvas.ForceUpdateCanvases();RenderPipeline.SubmitRenderRequest(camera,new UniversalRenderPipeline.SingleCameraRequest{destination=rt});
        var previous=RenderTexture.active;RenderTexture.active=rt;var tex=new Texture2D(1920,1080,TextureFormat.RGB24,false);tex.ReadPixels(new Rect(0,0,1920,1080),0,0);tex.Apply();RenderTexture.active=previous;
        var folder=Path.Combine(Path.GetDirectoryName(Application.dataPath),"Temp","HandbookValidation");
        Directory.CreateDirectory(folder);File.WriteAllBytes(Path.Combine(folder,"basement-preview.png"),tex.EncodeToPNG());
        UnityEngine.Object.DestroyImmediate(tex);camera.targetTexture=null;rt.Release();UnityEngine.Object.DestroyImmediate(rt);canvas.renderMode=RenderMode.ScreenSpaceOverlay;
    }
}