using System.Diagnostics;
using System.Timers;
using System.Windows.Forms;
using System.Xml;
using LiveSplit.Model;
using LiveSplit.UI;
using LiveSplit.UI.Components;
using SystemTimer = System.Timers.Timer;

namespace LiveSplit.TZA;

public class TzaComponent : LogicComponent {
    public override string ComponentName => "FFXII: The Zodiac Age";

    internal TimerModel Timer { get; }
    internal GameMemory? GameMemory { get; set; }
    private TzaControl Control { get; }
    private SystemTimer UpdateTimer { get; }
    private SplitLogic Logic { get; set; }

    public TzaComponent(LiveSplitState state) {
        this.Timer = new TimerModel { CurrentState = state };
        this.Control = new TzaControl();
        this.Logic = new SplitLogic();
        this.UpdateTimer = new SystemTimer(16f);
        this.UpdateTimer.Elapsed += this.UpdateTimeUpdate;
        this.UpdateTimer.Start();

        this.Timer.CurrentState.OnStart += this.OnStart;
        this.Timer.CurrentState.OnReset += this.OnReset;
    }

    public override void Dispose() {
        this.Timer.CurrentState.OnReset -= this.OnReset;
        this.Timer.CurrentState.OnStart += this.OnStart;
        this.UpdateTimer.Stop();
        this.UpdateTimer.Dispose();
    }

    private void OnStart(object sender, EventArgs e) {
        this.Timer.InitializeGameTime();
    }

    private void OnReset(object sender, TimerPhase value) {
        this.Logic = new SplitLogic();
    }

    private void UpdateTimeUpdate(object? sender, ElapsedEventArgs? e) {
        // if (this.Timer.CurrentState.Run.GameName != "FFXII: The Zodiac Age") {
        //     return;
        // }

        if (this.GameMemory == null) {
            var game = Process.GetProcessesByName("FFXII_TZA").FirstOrDefault();
            if (game != null) {
                this.GameMemory = new GameMemory(game);
            }
        }

        if (this.GameMemory != null) {
            if (!this.GameMemory.Update()) {
                this.GameMemory = null;
            }
        }

        if (this.GameMemory == null) {
            this.Timer.CurrentState.IsGameTimePaused = false;
            return;
        }

        if (this.Timer.CurrentState.CurrentPhase is not (TimerPhase.NotRunning or TimerPhase.Ended) && this.GameMemory.Location.Current is 12 or 13) {
            // if timer is started and at main menu or credits, never count as paused
            this.Timer.CurrentState.IsGameTimePaused = false;
        } else {
            this.Timer.CurrentState.IsGameTimePaused = (this.GameMemory.IsLoaded.Current & 0x100) != 0;
        }

        switch (this.Logic.Tick(this.Control, this.Timer.CurrentState.CurrentPhase, this.GameMemory)) {
            case LogicResult.Start:
                this.Timer.Start();
                break;
            case LogicResult.Split:
                this.Timer.Split();
                break;
            case LogicResult.None:
            default:
                // do nothing
                break;
        }
    }

    public override Control GetSettingsControl(LayoutMode mode) {
        return this.Control;
    }

    public override XmlNode GetSettings(XmlDocument document) {
        return this.Control.GetSettings(document);
    }

    public override void SetSettings(XmlNode settings) {
        this.Control.SetSettings(settings);
    }

    public override void Update(IInvalidator invalidator, LiveSplitState state, float width, float height, LayoutMode mode) {
    }
}