/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#ifndef CRAFTDEF_HEADER
#define CRAFTDEF_HEADER

#include <string>
#include <iostream>
#include <vector>
#include <utility>
#include "gamedef.h"
#include "inventory.h"

/*
	Crafting methods.

	The crafting method depends on the inventory list
	that the crafting input comes from.
*/
enum CraftMethod
{
	// Crafting grid
	CRAFT_METHOD_NORMAL,
	// Cooking something in a furnace
	CRAFT_METHOD_COOKING,
	// Using something as fuel for a furnace
	CRAFT_METHOD_FUEL,
};

/*
	Input: The contents of the crafting slots, arranged in matrix form
*/
struct CraftInput
{
	CraftMethod method;
	unsigned int width;
	std::vector<ItemStack> items;

	CraftInput():
		method(CRAFT_METHOD_NORMAL), width(0), items()
	{}
	CraftInput(CraftMethod method_, unsigned int width_,
			const std::vector<ItemStack> &items_):
		method(method_), width(width_), items(items_)
	{}
	std::string dump() const;
};

/*
	Output: Result of crafting operation
*/
struct CraftOutput
{
	// Used for normal crafting and cooking, itemstring
	std::string item;
	// Used for cooking (cook time) and fuel (burn time), seconds
	float time;

	CraftOutput():
		item(""), time(0)
	{}
	CraftOutput(std::string item_, float time_):
		item(item_), time(time_)
	{}
	std::string dump() const;
};

/*
	A list of replacements. A replacement indicates that a specific
	input item should not be deleted (when crafting) but replaced with
	a different item. Each replacements is a pair (itemstring to remove,
	itemstring to replace with)

	Example: If ("bucket:bucket_water", "bucket:bucket_empty") is a
	replacement pair, the crafting input slot that contained a water
	bucket will contain an empty bucket after crafting.

	Note: replacements only work correctly when stack_max of the item
	to be replaced is 1. It is up to the mod writer to ensure this.
*/
struct CraftReplacements
{
	// List of replacements
	std::vector<std::pair<std::string, std::string> > pairs;

	CraftReplacements():
		pairs()
	{}
	CraftReplacements(std::vector<std::pair<std::string, std::string> > pairs_):
		pairs(pairs_)
	{}
	std::string dump() const;
	void serialize(std::ostream &os) const;
	void deSerialize(std::istream &is);
};

/*
	Crafting definition base class
*/
class CraftDefinition
{
public:
	CraftDefinition(){}
	virtual ~CraftDefinition(){}

	void serialize(std::ostream &os) const;
	static CraftDefinition* deSerialize(std::istream &is);

	// Returns type of crafting definition
	virtual std::string getName() const=0;

	// Checks whether the recipe is applicable
	virtual bool check(const CraftInput &input, IGameDef *gamedef) const=0;
	// Returns the output structure, meaning depends on crafting method
	// The implementation can assume that check(input) returns true
	virtual CraftOutput getOutput(const CraftInput &input, IGameDef *gamedef) const=0;
	// the inverse of the above
	virtual CraftInput getInput(const CraftOutput &output, IGameDef *gamedef) const=0;
	// Decreases count of every input item
	virtual void decrementInput(CraftInput &input, IGameDef *gamedef) const=0;

	virtual std::string dump() const=0;

protected:
	virtual void serializeBody(std::ostream &os) const=0;
	virtual void deSerializeBody(std::istream &is, int version)=0;
};

/*
	A plain-jane (shaped) crafting definition

	Supported crafting method: CRAFT_METHOD_NORMAL.
	Requires the input items to be arranged exa</span>
<span class="hl com">Minetest</span>
<span class="hl com">Copyright (C) 2013 celeron55, Perttu Ahola &lt;celeron55&#64;gmail.com&gt;</span>
<span class="hl com"></span>
<span class="hl com">This program is free software; you can redistribute it and/or modify</span>
<span class="hl com">it under the terms of the GNU Lesser General Public License as published by</span>
<span class="hl com">the Free Software Foundation; either version 2.1 of the License, or</span>
<span class="hl com">(at your option) any later version.</span>
<span class="hl com"></span>
<span class="hl com">This program is distributed in the hope that it will be useful,</span>
<span class="hl com">but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class="hl com">MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<span class="hl com">GNU Lesser General Public License for more details.</span>
<span class="hl com"></span>
<span class="hl com">You should have received a copy of the GNU Lesser General Public License along</span>
<span class="hl com">with this program; if not, write to the Free Software Foundation, Inc.,</span>
<span class="hl com">51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.</span>
<span class="hl com">*/</span>

<span class="hl ppc">#include &lt;iostream&gt;</span>
<span class="hl ppc">#include &lt;sstream&gt;</span>
<span class="hl ppc">#include &lt;memory&gt;</span>

<span class="hl ppc">#include</span> <span class="hl pps">&quot;convert_json.h&quot;</span><span class="hl ppc"></span>

<span class="hl kwb">void</span> <span class="hl kwd">fastWriteJson</span><span class="hl opt">(</span><span class="hl kwb">const</span> <span class="hl kwc">Json</span><span class="hl opt">::</span>Value <span class="hl opt">&amp;</span>value<span class="hl opt">,</span> <span class="hl kwc">std</span><span class="hl opt">::</span>ostream <span class="hl opt">&amp;</span>to<span class="hl opt">)</span>
<span class="hl opt">{</span>
	<span class="hl kwc">Json</span><span class="hl opt">::</span>StreamWriterBuilder builder<span class="hl opt">;</span>
	builder<span class="hl opt">[</span><span class="hl str">&quot;indentation&quot;</span><span class="hl opt">] =</span> <span class="hl str">&quot;&quot;</span><span class="hl opt">;</span>
	<span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt">&lt;</span><span class="hl kwc">Json</span><span class="hl opt">::</span>StreamWriter<span class="hl opt">&gt;</span> <span class="hl kwd">writer</span><span class="hl opt">(</span>builder<span class="hl opt">.</span><span class="hl kwd">newStreamWriter</span><span class="hl opt">());</span>
	writer<span class="hl opt">-&gt;</span><span class="hl kwd">write</span><span class="hl opt">(</span>value<span class="hl opt">, &amp;</span>to<span class="hl opt">);</span>
<span class="hl opt">}</span>

<span class="hl kwc">std</span><span class="hl opt">::</span>string <span class="hl kwd">fastWriteJson</span><span class="hl opt">(</span><span class="hl kwb">const</span> <span class="hl kwc">Json</span><span class="hl opt">::</span>Value <span class="hl opt">&amp;</span>value<span class="hl opt">)</span>
<span class="hl opt">{</span>
	<span class="hl kwc">std</span><span class="hl opt">::</span>ostringstream oss<span class="hl opt">;</span>
	<span class="hl kwd">fastWriteJson</span><span class="hl opt">(</span>value<span class="hl opt">,</span> oss<span class="hl opt">);</span>
	<span class="hl kwa">return</span> oss<span class="hl opt">.</span><span class="hl kwd">str</span><span class="hl opt">();</span>
<span class="hl opt">}</span>
</code></pre></td></tr></table>
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raftDefinitionCooking(
			const std::string &output_,
			const std::string &recipe_,
			float cooktime_,
			const CraftReplacements &replacements_):
		output(output_), recipe(recipe_), cooktime(cooktime_), replacements(replacements_)
	{}
	virtual ~CraftDefinitionCooking(){}

	virtual std::string getName() const;
	virtual bool check(const CraftInput &input, IGameDef *gamedef) const;
	virtual CraftOutput getOutput(const CraftInput &input, IGameDef *gamedef) const;
	virtual CraftInput getInput(const CraftOutput &output, IGameDef *gamedef) const;
	virtual void decrementInput(CraftInput &input, IGameDef *gamedef) const;

	virtual std::string dump() const;

protected:
	virtual void serializeBody(std::ostream &os) const;
	virtual void deSerializeBody(std::istream &is, int version);

private:
	// Output itemstring
	std::string output;
	// Recipe itemstring
	std::string recipe;
	// Time in seconds
	float cooktime;
	// Replacement items for decrementInput()
	CraftReplacements replacements;
};

/*
	A fuel (for furnace) definition
	Supported crafting method: CRAFT_METHOD_FUEL.
*/
class CraftDefinitionFuel: public CraftDefinition
{
public:
	CraftDefinitionFuel():
		recipe(""), burntime()
	{}
	CraftDefinitionFuel(std::string recipe_,
			float burntime_,
			const CraftReplacements &replacements_):
		recipe(recipe_), burntime(burntime_), replacements(replacements_)
	{}
	virtual ~CraftDefinitionFuel(){}

	virtual std::string getName() const;
	virtual bool check(const CraftInput &input, IGameDef *gamedef) const;
	virtual CraftOutput getOutput(const CraftInput &input, IGameDef *gamedef) const;
	virtual CraftInput getInput(const CraftOutput &output, IGameDef *gamedef) const;
	virtual void decrementInput(CraftInput &input, IGameDef *gamedef) const;

	virtual std::string dump() const;

protected:
	virtual void serializeBody(std::ostream &os) const;
	virtual void deSerializeBody(std::istream &is, int version);

private:
	// Recipe itemstring
	std::string recipe;
	// Time in seconds
	float burntime;
	// Replacement items for decrementInput()
	CraftReplacements replacements;
};

/*
	Crafting definition manager
*/
class ICraftDefManager
{
public:
	ICraftDefManager(){}
	virtual ~ICraftDefManager(){}

	// The main crafting function
	virtual bool getCraftResult(CraftInput &input, CraftOutput &output,
			bool decrementInput, IGameDef *gamedef) const=0;
	virtual bool getCraftRecipe(CraftInput &input, CraftOutput &output,
			IGameDef *gamedef) const=0;
	virtual std::vector<CraftDefinition*> getCraftRecipes(CraftOutput &output,
			IGameDef *gamedef) const=0;
	
	// Print crafting recipes for debugging
	virtual std::string dump() const=0;

	virtual void serialize(std::ostream &os) const=0;
};

class IWritableCraftDefManager : public ICraftDefManager
{
public:
	IWritableCraftDefManager(){}
	virtual ~IWritableCraftDefManager(){}

	// The main crafting function
	virtual bool getCraftResult(CraftInput &input, CraftOutput &output,
			bool decrementInput, IGameDef *gamedef) const=0;
	virtual bool getCraftRecipe(CraftInput &input, CraftOutput &output,
			IGameDef *gamedef) const=0;
	virtual std::vector<CraftDefinition*> getCraftRecipes(CraftOutput &output, 
			IGameDef *gamedef) const=0;

	// Print crafting recipes for debugging
	virtual std::string dump() const=0;

	// Add a crafting definition.
	// After calling this, the pointer belongs to the manager.
	virtual void registerCraft(CraftDefinition *def)=0;
	// Delete all crafting definitions
	virtual void clear()=0;

	virtual void serialize(std::ostream &os) const=0;
	virtual void deSerialize(std::istream &is)=0;
};

IWritableCraftDefManager* createCraftDefManager();

#endif