namespace NoChillquarium;

/// <summary>
/// Soft menu unlock ladder — learn one tool, earn the next.
/// Mirrors fusion's "food + feed" gate: hide advanced UI until the prior skill is practiced.
/// </summary>
public static class Progression
{
	// ---- Soft unlocks (UI + systems) ----

	/// <summary>Gym after the player has bought food and fed once.</summary>
	public static bool TrainUnlocked => StorySystem.HasFedOnce;

	/// <summary>Same care gate as fusion — aboms after feed.</summary>
	public static bool CombineUnlocked =>
		FeedSystem.HasAnyFood && StorySystem.HasFedOnce;

	/// <summary>
	/// Fight appears when you can pay entry <b>and</b> you've trained once
	/// (teach gym before circuits).
	/// </summary>
	public static bool FightUnlocked =>
		StorySystem.HasTrainedOnce && BattleSystem.CanAffordAnyFight();

	/// <summary>Decor shop after early care + a couple fish (not day-one clutter).</summary>
	public static bool DecorShopUnlocked =>
		StorySystem.HasFedOnce && TankSim.TotalFishCount >= 2;

	/// <summary>Shady / M80 after you've combined or fought — midgame chaos tools.</summary>
	public static bool ShadyUnlocked =>
		StorySystem.HasCombinedOnce
		|| BattleSystem.Wins + BattleSystem.Losses > 0
		|| StorySystem.HasBoomOnce;

	/// <summary>Adventure Mode after fusion + fight intros (last ladder gift).</summary>
	public static bool AdventureUnlocked => LotRunSystem.Unlocked;

	// ---- Player-facing lock hints (short, funny) ----

	public static string TrainHint =>
		TrainUnlocked ? "" : "Feed once first";

	public static string FightHint
	{
		get
		{
			if ( FightUnlocked )
				return "";
			if ( !StorySystem.HasTrainedOnce )
				return "Train once first";
			var fee = CheapestOpenEntryFee();
			if ( fee > 0 && Economy.Balance + 0.001 < fee )
				return $"Need Ð{Economy.FormatDoge( fee )} entry";
			if ( !BattleSystem.CanAffordAnyFight() )
				return "Earn entry Ð first";
			return "Not yet";
		}
	}

	/// <summary>Entry fee of the cheapest unlocked circuit, or 0 if none open yet.</summary>
	public static double CheapestOpenEntryFee()
	{
		double best = 0;
		foreach ( var t in BattleSystem.Catalog )
		{
			if ( t is null || !BattleSystem.IsUnlocked( t ) )
				continue;
			if ( best <= 0 || t.EntryFee < best )
				best = t.EntryFee;
		}
		return best;
	}

	public static string DecorHint =>
		DecorShopUnlocked
			? ""
			: !StorySystem.HasFedOnce
				? "Feed once first"
				: "Need 2+ fish";

	public static string ShadyHint =>
		ShadyUnlocked
			? ""
			: "Combine or fight first";

	public static string AdventureHint =>
		AdventureUnlocked ? "" : LotRunSystem.UnlockHint;

	/// <summary>One-line ladder for banners / menus.</summary>
	public static string LadderHint =>
		"Care → Combine → Fight → Adventure";
}