using Luneraria.Core;
using UnityEngine;

namespace Luneraria.View
{
    /// <summary>
    /// Hosts a bot match in the scene (U2C/U2D). Update only hands frame time (times Speed) to the
    /// runner's fixed clock; it never decides anything in combat. Seed, start round and extra gold
    /// are the public fixtures of the golden scenarios.
    /// </summary>
    public sealed class LuneMatchDriver : MonoBehaviour
    {
        public int Seed = 2;
        public int StartRound = 1;
        public int ExtraGold;
        public string Profile = "";
        /// <summary>Match speed: simulated seconds per real second.</summary>
        public float Speed = 1f;
        public bool Paused;
        public bool RecordTrace = true;

        public LuneMatchRunner Runner { get; private set; }
        /// <summary>Main-thread cost of the last frame's simulation (milliseconds).</summary>
        public double LastAdvanceMs { get; private set; }
        readonly System.Diagnostics.Stopwatch _clock = new System.Diagnostics.Stopwatch();

        public void Restart()
        {
            Runner = new LuneMatchRunner(new MatchOptions { Seed = Seed, HumanSlot = -1 }, StartRound, ExtraGold, Profile);
            if (RecordTrace)
                Runner.Trace = new LuneTrace();
        }

        void Awake()
        {
            if (Runner == null)
                Restart();
        }

        void Update()
        {
            _clock.Restart();
            if (!Paused)
                Runner.Advance(Time.deltaTime * Speed);
            LastAdvanceMs = _clock.Elapsed.TotalMilliseconds;
        }
    }
}