using System;
using System.IO;
using System.Reflection;
using System.Text;
using HutongGames.PlayMaker;
using UnityEngine;

namespace MSCO
{
    /// <summary>
    /// Diagnose: PlayMaker-FSMs (Zustände, Aktionen mit Werten, Übergänge) und Scharniere von Objekten, deren Pfad einen
    /// Suchtext enthält, in MSCO\fsmdump.txt schreiben. Konsole (F7): "fsmdump &lt;text&gt;". Mit der Startoption
    /// "-msco-dump text1,text2" automatisch 25 s nach dem Laden des Spiels.
    /// </summary>
    public static class FsmDump
    {
        public static string Write(string filter)
        {
            string[] filters = (filter ?? "").ToLowerInvariant().Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
            if (filters.Length == 0) return "fsmdump <text>[,text2] - e.g. fsmdump garage";
            var sb = new StringBuilder();
            int count = 0;
            foreach (PlayMakerFSM fsm in Resources.FindObjectsOfTypeAll<PlayMakerFSM>())
            {
                if (fsm == null || fsm.gameObject == null || fsm.gameObject.hideFlags != HideFlags.None) continue;
                string path, lower;
                try { path = FsmSync.PathOf(fsm.transform); lower = (path + "|" + fsm.FsmName).ToLowerInvariant(); }
                catch { continue; }
                if (Array.FindIndex(filters, f => lower.Contains(f.Trim())) < 0) continue;
                if (++count > 400) break;
                try { Dump(sb, fsm, path); }
                catch (Exception e) { sb.Append("  (error: ").Append(e.Message).Append(")").AppendLine(); }
            }
            foreach (HingeJoint j in Resources.FindObjectsOfTypeAll<HingeJoint>())
            {
                if (j == null || j.gameObject.hideFlags != HideFlags.None) continue;
                string path = FsmSync.PathOf(j.transform);
                if (Array.FindIndex(filters, f => path.ToLowerInvariant().Contains(f.Trim())) < 0) continue;
                Rigidbody rb = j.GetComponent<Rigidbody>();
                try {
                sb.Append("HINGE ").Append(path).Append(" -> ").Append(j.connectedBody != null ? FsmSync.PathOf(j.connectedBody.transform) : "-")
                  .Append(" | active ").Append(j.gameObject.activeInHierarchy).Append(" angle ").Append(j.angle.ToString("0.0"))
                  .Append(" limits ").Append(j.useLimits).Append(' ').Append(j.limits.min.ToString("0")).Append("..").Append(j.limits.max.ToString("0"))
                  .Append(" spring ").Append(j.useSpring).Append(' ').Append(j.spring.spring.ToString("0")).Append('/').Append(j.spring.targetPosition.ToString("0"))
                  .Append(" motor ").Append(j.useMotor)
                  .Append(" kinematic ").Append(rb != null && rb.isKinematic).Append(" break ").Append(j.breakForce).AppendLine();
                } catch (Exception e) { sb.Append(" (error: ").Append(e.Message).Append(")").AppendLine(); }
            }
            string file = Path.Combine(Bootstrap.Folder ?? ".", "fsmdump.txt");
            File.WriteAllText(file, sb.ToString());
            return count + " FSM(s) written to " + file;
        }

        static void Dump(StringBuilder sb, PlayMakerFSM fsm, string path)
        {
            sb.Append("==== ").Append(path).Append(" | ").Append(fsm.FsmName).Append(" | active ").Append(fsm.gameObject.activeInHierarchy)
              .Append(" | state ").Append(fsm.ActiveStateName).AppendLine();
            if (fsm.FsmGlobalTransitions != null)
            foreach (FsmTransition t in fsm.FsmGlobalTransitions)
                sb.Append("  GLOBAL ").Append(t.EventName).Append(" -> ").Append(t.ToState).AppendLine();
            if (fsm.FsmStates == null) return;
            foreach (FsmState s in fsm.FsmStates)
            {
                if (s == null) continue;
                if (!s.ActionsLoaded) s.LoadActions();
                sb.Append("  [").Append(s.Name).Append(']');
                if (s.Transitions != null) foreach (FsmTransition t in s.Transitions) if (t != null) sb.Append("  ").Append(t.EventName).Append("->").Append(t.ToState);
                sb.AppendLine();
                if (s.Actions == null) continue;
                foreach (FsmStateAction a in s.Actions)
                {
                    if (a == null) continue;
                    sb.Append("      ").Append(a.GetType().Name).Append(Fields(a)).AppendLine();
                }
            }
        }

        static string Fields(FsmStateAction a)
        {
            var sb = new StringBuilder();
            foreach (FieldInfo f in a.GetType().GetFields(BindingFlags.Public | BindingFlags.Instance))
            {
                object v;
                try { v = f.GetValue(a); } catch { continue; }
                string text = Describe(v);
                if (text == null) continue;
                sb.Append(' ').Append(f.Name).Append('=').Append(text);
            }
            return sb.ToString();
        }

        static string Describe(object v)
        {
            if (v == null) return null;
            var named = v as NamedVariable;
            if (named != null)
            {
                string value;
                try { value = Convert.ToString(v.GetType().GetProperty("Value").GetValue(v, null)); } catch { value = "?"; }
                return (string.IsNullOrEmpty(named.Name) ? "" : "{" + named.Name + "}") + value;
            }
            var ev = v as FsmEvent;
            if (ev != null) return "event:" + ev.Name;
            var owner = v as FsmOwnerDefault;
            if (owner != null) return owner.OwnerOption == OwnerDefaultOption.UseOwner ? "owner" : Describe(owner.GameObject);
            if (v is string || v is bool || v is int || v is float || v.GetType().IsEnum) return Convert.ToString(v);
            return null;
        }
    }
}