/*****************************************************************************
The Dark Mod GPL Source Code

This file is part of the The Dark Mod Source Code, originally based
on the Doom 3 GPL Source Code as published in 2011.

The Dark Mod Source Code is free software: you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version. For details, see LICENSE.TXT.

Project: The Dark Mod (http://www.thedarkmod.com/)

******************************************************************************/

#ifndef TDM_LOOTRULESET_H
#define TDM_LOOTRULESET_H

#include "../Inventory/LootType.h"

/**
 * greebo: A structure defining loot carry-over rules for the shop.
 * The mapper can define how much of the collected loot 
 * makes it into the shop.
 *
 * A default-constructed LootRules set won't change the incoming loot values
 * everything is losslessly passed through with a 1:1 conversion, 
 * and the player is allowed to keep his money.
 */
struct LootRuleSet
{
	// The conversion rate for each loot type. Before entering the shop
	// every loot type is converted to gold.
	float	conversionRate[LOOT_COUNT];

	// Gold loss after conversion (defaults to 0 => no loss)
	int		goldLoss;

	// Gold loss by percent after conversion (defaults to 0 => no loss)
	float	goldLossPercent;

	// Minimum amount of gold available in the shop. At least this value is guaranteed to be returned by ApplyToFoundLoot
	int		goldMin;

	// Maximum amount of gold available in the shop. Enforced after conversion. (default is -1 => no cap)
	int		goldCap;

	LootRuleSet()
	{
		Clear();
	}

	void Clear();

	// Equality operator, returns true if this class is the same as the other. Doesn't check LOOT_NONE conversion.
	bool operator==(const LootRuleSet& other) const;

	// Returns TRUE if this lootrule structure is at default values
	// This is a comparably slow call, so don't use it excessively
	bool IsEmpty() const
	{
		// Compare this instance against a default-constructed one
		return *this == LootRuleSet();
	}

	// Load the ruleset from the spawnargs matching the given prefix
	void LoadFromDict(const idDict& dict, const idStr& prefix);

	/** 
	 * Apply this ruleset to the given amount of found loot and shop start budget.
	 *
	 * @foundLoot: The loot collected values.
	 * @shopStartingGold: The amount of starting gold for the shop. This value
	 * is added after applying the losses, but before the min/max caps are applied.
	 *
	 * Returns the amount of resulting gold, which is at least goldMin.
	 */
	int ApplyToFoundLoot(const int foundLoot[LOOT_COUNT], int shopStartingGold);
};

#endif