using System;
using UnityEditor;
using UnityEditor.Build;
using UnityEditor.Callbacks;

class ConfigurationChecker {

    [DidReloadScripts]
    protected static void DidReloadScripts() {
        CheckUnityMathematics();
    }

    public static bool CheckUnityMathematics() {
        bool available = isUnityMathematicsAvailable;
        UpdateDefine(available, "UNITY_MATHEMATICS");
        return available;
    }

    protected static void UpdateDefine(bool enabled, string define) {
        if (enabled)
            GlobalDefine(define);
        else
            GlobalUndefine(define);
    }


    public static void GlobalDefine(string name) {
        UnityEngine.Debug.Log("Define " + name);
        BuildTargetGroup buildTargetGroup = EditorUserBuildSettings.selectedBuildTargetGroup;
        NamedBuildTarget namedBuildTarget = UnityEditor.Build.NamedBuildTarget.FromBuildTargetGroup(buildTargetGroup);
        //string scriptDefines = PlayerSettings.GetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup);
        string scriptDefines = PlayerSettings.GetScriptingDefineSymbols(namedBuildTarget);
        if (!scriptDefines.Contains(name)) {
            string newScriptDefines = scriptDefines + " " + name;
            if (EditorUserBuildSettings.selectedBuildTargetGroup != 0)
                PlayerSettings.SetScriptingDefineSymbols(namedBuildTarget, newScriptDefines);
            //PlayerSettings.SetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup, newScriptDefines);
        }
    }

    public static void GlobalUndefine(string name) {
        UnityEngine.Debug.Log("Undefine " + name);
        BuildTargetGroup buildTargetGroup = EditorUserBuildSettings.selectedBuildTargetGroup;
        NamedBuildTarget namedBuildTarget = UnityEditor.Build.NamedBuildTarget.FromBuildTargetGroup(buildTargetGroup);
        // string scriptDefines = PlayerSettings.GetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup);
        string scriptDefines = PlayerSettings.GetScriptingDefineSymbols(namedBuildTarget);
        if (scriptDefines.Contains(name)) {
            int playMakerIndex = scriptDefines.IndexOf(name);
            string newScriptDefines = scriptDefines.Remove(playMakerIndex, name.Length);
            PlayerSettings.SetScriptingDefineSymbols(namedBuildTarget, newScriptDefines);
            // PlayerSettings.SetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup, newScriptDefines);
        }

    }

    #region Availability

    #region Packages

    private static bool isUnityMathematicsAvailable {
        get => DoesTypeExist("Unity.Mathematics.float3");
        // {
        //     return DoesTypeExist("Passer.Tracking.HydraBaseStation");
        // }
    }
    #endregion Packages

    public static bool DoesTypeExist(string className) {
        System.Reflection.Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
        foreach (System.Reflection.Assembly assembly in assemblies) {
            if (assembly.GetType(className) != null)
                return true;
        }
        return false;
    }

    #endregion Availability
}