using System.IO;
using NeoModLoader.services;
using UnityEngine;

namespace IdleSpectator;

/// <summary>
/// One-shot automated session: enable spectator when a world is loaded, run for a while,
/// log a pass/fail verdict from StateProbe, then quit. Arm with an empty <c>.auto-test</c>
/// file in the mod folder (deleted when finished).
/// </summary>
public static class AutoTest
{
    private const float DurationSeconds = 50f;
    private static bool _armed;
    private static bool _running;
    private static float _startedAt = -1f;
    private static bool _finished;

    public static void Update()
    {
        if (_finished)
        {
            return;
        }

        if (!_armed)
        {
            string path = AutoTestPath();
            if (string.IsNullOrEmpty(path) || !File.Exists(path))
            {
                return;
            }

            _armed = true;
            LogService.LogInfo("[IdleSpectator][AUTOTEST] armed - waiting for world load");
        }

        if (!Config.game_loaded || World.world == null || SmoothLoader.isLoading())
        {
            return;
        }

        if (!_running)
        {
            _running = true;
            _startedAt = Time.unscaledTime;
            StateProbe.ResetCounters();
            if (!SpectatorMode.Active)
            {
                SpectatorMode.SetActive(true);
            }

            LogService.LogInfo(
                $"[IdleSpectator][AUTOTEST] started for {DurationSeconds:0}s (idle={SpectatorMode.Active})");
            return;
        }

        if (Time.unscaledTime - _startedAt < DurationSeconds)
        {
            return;
        }

        _finished = true;
        int bad = StateProbe.BadEventCount;
        int states = StateProbe.StateEventCount;
        bool focusOk = MoveCamera.hasFocusUnit();
        bool barHidden = !CanvasMain.isBottomBarShowing();
        bool pass = bad == 0 && SpectatorMode.Active && focusOk && barHidden;
        string verdict = pass ? "PASS" : "FAIL";
        LogService.LogInfo(
            $"[IdleSpectator][AUTOTEST] {verdict} duration={DurationSeconds:0}s states={states} bad={bad} idle={SpectatorMode.Active} focus={focusOk} powerBar={!barHidden}");

        try
        {
            string path = AutoTestPath();
            if (!string.IsNullOrEmpty(path) && File.Exists(path))
            {
                File.Delete(path);
            }
        }
        catch
        {
            // ignore
        }

        // Do not Application.Quit() - that often freezes the Steam/Unity process on Linux.
        LogService.LogInfo("[IdleSpectator][AUTOTEST] finished (leaving game running)");
        if (SpectatorMode.Active)
        {
            SpectatorMode.SetActive(false);
        }
    }

    private static string AutoTestPath()
    {
        string modFolder = ModClass.ModFolder;
        if (string.IsNullOrEmpty(modFolder))
        {
            return null;
        }

        return Path.Combine(modFolder, ".auto-test");
    }
}