using System.Collections.Generic;
using System.Globalization;
using HutongGames.PlayMaker;
using UnityEngine;

namespace MSCO
{
    /// <summary>
    /// Konsole "oilcheck": woher läuft Öl aus? Das Spiel kennt fünf Quellen - die Motor-FSM rechnet LeakOilpan,
    /// LeakOilfilter, LeakHeadgasket und LeakRockerCover aus den Teilen aus, dazu die Ablassschraube der Ölwanne
    /// (Stufe 0-5 = offen, Objekt "Oil" aktiv). Der Ölfilter ist ein gekauftes Teil und steht in items.txt
    /// (Installed/Tightness) - fehlt die Datei im Spielstand eines Servers, fehlt auch der Filter.
    /// </summary>
    public static class OilCheck
    {
        static readonly string[] PartWords = { "oilpan", "oilfilter", "oil filter", "headgasket", "rocker", "valvecover", "drain" };

        public static List<string> Report()
        {
            var lines = new List<string>();
            if (!MenuHelper.InGame) { lines.Add("Only in the game."); return lines; }

            var fsms = Object.FindObjectsOfType<PlayMakerFSM>();
            // 1. Leck-Werte der Motor-FSM
            bool leakFsm = false;
            foreach (PlayMakerFSM f in fsms)
            {
                if (f == null || f.FsmVariables.FindFsmFloat("LeakOilfilter") == null) continue;
                leakFsm = true;
                var parts = new List<string>();
                foreach (FsmFloat v in f.FsmVariables.FloatVariables)
                    if (v != null && v.Name.StartsWith("Leak")) parts.Add(v.Name + "=" + Num(v.Value));
                lines.Add("Engine leaks (" + f.gameObject.name + "/" + f.FsmName + ", state " + f.ActiveStateName + "): " + string.Join("  ", parts.ToArray()));
            }
            if (!leakFsm) lines.Add("Engine leak values: not found (engine not assembled?)");

            // 2. Teile in der Database (eingebaut, festgeschraubt, kaputt, Ölstand)
            foreach (PlayMakerFSM f in Resources.FindObjectsOfTypeAll<PlayMakerFSM>())
            {
                if (f == null || f.FsmName != "Data" || f.gameObject.hideFlags != HideFlags.None) continue;
                if (f.transform.root.name != "Database" || !Matches(f.gameObject.name)) continue;
                lines.Add("  " + f.gameObject.name + ": " + Values(f.FsmVariables, "Installed", "Bolted", "Damaged", "Tightness", "Oil", "Wear"));
            }

            // 3. Schrauben der Ölwanne (die Ablassschraube schaltet das Leck "Oil")
            foreach (PlayMakerFSM f in fsms)
            {
                if (f == null || f.FsmName != "Screw") continue;
                string path = FsmSync.PathOf(f.transform);
                if (path.ToLower().IndexOf("oilpan", System.StringComparison.Ordinal) < 0) continue;
                FsmInt stage = f.FsmVariables.FindFsmInt("Stage");
                lines.Add("  bolt " + Short(path) + ": stage " + (stage != null ? stage.Value.ToString() : "?") + (Switches(f) ? "  (drain plug - 0-5 = open)" : ""));
            }
            foreach (GameObject go in Object.FindObjectsOfType<GameObject>())
                if (go.name == "Oil" && go.transform.parent != null && FsmSync.PathOf(go.transform).ToLower().Contains("oilpan"))
                    lines.Add("  drain leak object " + Short(FsmSync.PathOf(go.transform)) + " is ACTIVE (oil runs out of the drain plug)");

            // 4. Ölfilter als Gegenstand (items.txt)
            int filters = 0;
            foreach (PlayMakerFSM f in fsms)
            {
                if (f == null || !f.gameObject.name.StartsWith("oil filter")) continue;
                if (f.FsmVariables.FindFsmBool("Installed") == null && f.FsmVariables.FindFsmFloat("Tightness") == null) continue;
                filters++;
                lines.Add("  item " + f.gameObject.name + " (" + f.FsmName + ", under " + f.transform.root.name + "): "
                          + Values(f.FsmVariables, "Installed", "Tightness", "Consumed", "Dirt"));
            }
            if (filters == 0) lines.Add("  no oil filter item in the world - if the server's save has no items.txt, bought parts are missing");
            return lines;
        }

        static bool Matches(string name)
        {
            string n = name.ToLower();
            foreach (string w in PartWords) if (n.Contains(w)) return true;
            return false;
        }

        static bool Switches(PlayMakerFSM f)
        {
            try
            {
                foreach (FsmState s in f.FsmStates)
                {
                    if (!s.ActionsLoaded) s.LoadActions();
                    if (s.Actions == null) continue;
                    foreach (FsmStateAction a in s.Actions) if (a != null && a.GetType().Name == "ActivateGameObject") return true;
                }
            }
            catch { }
            return false;
        }

        static string Values(FsmVariables vars, params string[] names)
        {
            var parts = new List<string>();
            foreach (string n in names)
            {
                FsmBool b = vars.FindFsmBool(n);
                if (b != null) { parts.Add(n + "=" + b.Value); continue; }
                FsmFloat f = vars.FindFsmFloat(n);
                if (f != null) { parts.Add(n + "=" + Num(f.Value)); continue; }
                FsmInt i = vars.FindFsmInt(n);
                if (i != null) parts.Add(n + "=" + i.Value);
            }
            return parts.Count == 0 ? "-" : string.Join("  ", parts.ToArray());
        }

        static string Num(float v) { return v.ToString("0.###", CultureInfo.InvariantCulture); }

        static string Short(string path)
        {
            string[] s = path.Split('|');
            return s.Length <= 3 ? path : "…|" + string.Join("|", s, s.Length - 3, 3);
        }
    }
}