using HarmonyLib;
using UnityEngine;

namespace TownOfUsStatsExporter.Patches;

/// <summary>
/// Tracks when the game actually starts (after intro cutscene ends).
/// This allows calculating actual game duration instead of lobby time.
/// </summary>
[HarmonyPatch]
public static class GameStartTimePatch
{
    /// <summary>
    /// Time when the game started (after intro cutscene), in Unity Time.time format.
    /// Null if game hasn't started yet.
    /// </summary>
    public static float? GameStartTime { get; private set; }

    /// <summary>
    /// Duration of the last completed game in seconds.
    /// Set when the game ends, persists until next game starts.
    /// </summary>
    public static float LastGameDuration { get; private set; }

    /// <summary>
    /// Gets the duration of the last completed game in seconds.
    /// This value is set when the game ends and remains available for async export.
    /// </summary>
    public static float GetGameDuration()
    {
        return LastGameDuration;
    }

    /// <summary>
    /// Patch on ShipStatus.Begin - called when the game round starts.
    /// This is more reliable than IntroCutscene.OnDestroy as it's always called when gameplay begins.
    /// </summary>
    [HarmonyPatch(typeof(ShipStatus), nameof(ShipStatus.Begin))]
    [HarmonyPostfix]
    public static void OnShipStatusBegin()
    {
        GameStartTime = Time.time;
        LastGameDuration = 0f; // Reset duration for new game
        TownOfUsStatsPlugin.Logger.LogInfo($"Game started at Time.time = {GameStartTime.Value:F2}");
    }

    /// <summary>
    /// Calculate and store game duration when game ends.
    /// This runs before the export, so duration is available for async export.
    /// </summary>
    [HarmonyPatch(typeof(AmongUsClient), nameof(AmongUsClient.OnGameEnd))]
    [HarmonyPrefix]
    public static void OnGameEndPrefix()
    {
        if (GameStartTime.HasValue)
        {
            LastGameDuration = Time.time - GameStartTime.Value;
            TownOfUsStatsPlugin.Logger.LogInfo($"Game ended. Duration: {LastGameDuration:F2} seconds ({LastGameDuration / 60:F2} minutes)");
        }
        else
        {
            LastGameDuration = 0f;
            TownOfUsStatsPlugin.Logger.LogWarning("Game ended but GameStartTime was not set! Duration will be 0.");
        }
    }

    /// <summary>
    /// Clear game start time after game ends to prepare for next game.
    /// LastGameDuration is preserved for async export.
    /// </summary>
    [HarmonyPatch(typeof(AmongUsClient), nameof(AmongUsClient.OnGameEnd))]
    [HarmonyPostfix]
    [HarmonyPriority(Priority.Last)]
    public static void OnGameEndPostfix()
    {
        GameStartTime = null;
        TownOfUsStatsPlugin.Logger.LogInfo("Game start time cleared (duration preserved for export)");
    }
}