/* Planet.h
Copyright (c) 2014 by Michael Zahniser

Endless Sky 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.

Endless Sky 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 General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program. If not, see <https://www.gnu.org/licenses/>.
*/

#pragma once

#include "Paragraphs.h"
#include "Port.h"
#include "Sale.h"
#include "Shop.h"

#include <list>
#include <memory>
#include <set>
#include <string>
#include <vector>

class ConditionsStore;
class DataNode;
class Fleet;
class Government;
class Outfit;
class PlayerInfo;
class Ship;
class Sprite;
class System;
class Wormhole;



// Class representing a stellar object you can land on. (This includes planets,
// moons, and space stations.) Each planet has a certain set of services that
// are available, as well as attributes that determine what sort of missions
// might choose it as a source or destination.
class Planet {
public:
	enum class Friendliness : int_fast8_t {
		FRIENDLY,
		RESTRICTED,
		HOSTILE,
		DOMINATED
	};


public:
	// Load a planet's description from a file.
	void Load(const DataNode &node, Set<Wormhole> &wormholes, const ConditionsStore *playerConditions);
	// Legacy wormhole do not have an associated Wormhole object so
	// we must auto generate one if we detect such legacy wormhole.
	void FinishLoading(Set<Wormhole> &wormholes);
	// Check if both this planet and its containing system(s) have been defined.
	bool IsValid() const;

	// Get the name used for this planet in the data files.
	// When saving missions or writing the player's save, the true name
	// associated with this planet is used even if the planet was not fully
	// defined (i.e. it belongs to an inactive plugin).
	const std::string &TrueName() const;
	void SetTrueName(const std::string &name);
	// Get the display name of the planet (all wormholes use the same name).
	const std::string &DisplayName() const;
	// Return the description text for the planet, but not the spaceport:
	const Paragraphs &Description() const;
	// Get the landscape sprite.
	const Sprite *Landscape() const;
	// Get the name of the ambient audio to play on this planet.
	const std::string &MusicName() const;

	// Get the list of "attributes" of the planet.
	const std::set<std::string> &Attributes() const;

	// Get planet's noun descriptor from attributes
	const std::string &Noun() const;

	// Check whether this planet's port is named.
	bool HasNamedPort() const;
	// Get this planet's port.
	const Port &GetPort() const;
	// Check whether there are port services (such as trading, jobs, banking, and hiring)
	// available on this planet.
	bool HasServices() const;

	// Check if this planet is inhabited (i.e. it has a spaceport, and does not
	// have the "uninhabited" attribute).
	bool IsInhabited() const;

	// Check if the security of this planet has been changed from the default so
	// that we can check if an uninhabited world should fine the player.
	bool HasCustomSecurity() const;

	// Check if this planet has a permanent shipyard.
	bool HasShipyard() const;
	// Get the list of ships in the permanent shipyard.
	const Sale<Ship> &ShipyardStock() const;
	// Get the list of shipyards currently available on this planet.
	// This will include conditionally available shops.
	std::set<const Shop<Ship> *> Shipyards() const;

	// Check if this planet has a permanent outfitter.
	bool HasOutfitter() const;
	// Get the list of outfits available from the permanent outfitter.
	const Sale<Outfit> &OutfitterStock() const;
	// Get the list of outitters available on this planet.
	// This will include conditionally available shops.
	std::set<const Shop<Outfit> *> Outfitters() const;

	// Get this planet's government. If not set, returns the system's government.
	const Government *GetGovernment() const;
	// You need this good a reputation with this system's government to land here.
	double RequiredReputation() const;
	// This is what fraction of your fleet's value you must pay as a bribe in
	// order to land on this planet. (If zero, you cannot bribe it.)
	double GetBribeFraction() const;
	// This is how likely the planet's authorities are to notice if you are
	// doing something illegal.
	double Security() const;

	// Set or get what system this planet is in. This is so that missions, for
	// example, can just hold a planet pointer instead of a system as well.
	const System *GetSystem() const;
	// Check if this planet is in the given system. Note that wormholes may be
	// in more than one system.
	bool IsInSystem(const System *system) const;
	void SetSystem(const System *system);
	// Remove the given system from the list of systems this planet is in. This
	// must be done when game events rearrange the planets in a system.
	void RemoveSystem(const System *system);
	// Every system this planet is in. If this list has more than one entry, it's a wormhole.
	const std::vector<const System *> &Systems() const;

	// Check if planet is part of a wormhole (that is, landing on it will take you to a new system).
	bool IsWormhole() const;
	const Wormhole *GetWormhole() const;

	// Check if the given ship has all the attributes necessary to allow it to
	// land on this planet.
	bool IsAccessible(const Ship *ship) const;
	// Check if this planet has any required attributes that restrict landability.
	bool IsUnrestricted() const;

	// Below are convenience functions which access the game state in Politics,
	// but do so with a less convoluted syntax:
	bool HasFuelFor(const Ship &ship) const;
	bool CanLand(const Ship &ship) const;
	bool CanLand() const;
	Friendliness GetFriendliness() const;
	bool CanUseServices() const;
	void Bribe(bool fullAccess = true) const;

	// Demand tribute, and get the planet's response.
	std::string DemandTribute(PlayerInfo &player) const;
	void DeployDefense(std::list<std::shared_ptr<Ship>> &ships) const;
	void ResetDefense() const;
	bool IsDefending() const;


private:
	bool isDefined = false;
	std::string trueName;
	std::string displayName;
	Paragraphs description;
	Port port;
	const Sprite *landscape = nullptr;
	std::string music;

	std::set<std::string> attributes;

	std::set<const Shop<Ship> *> shipSales;
	std::set<const Shop<Outfit> *> outfitSales;
	// The lists above will be converted into actual ship lists when they are
	// first asked for:
	mutable Sale<Ship> shipyard;
	mutable Sale<Outfit> outfitter;

	const Government *government = nullptr;
	double requiredReputation = 0.;
	double bribe = 0.01;
	double security = .25;
	bool inhabited = false;
	bool customSecurity = false;
	// Any required attributes needed to land on this planet.
	std::set<std::string> requiredAttributes;

	// The salary to be paid if this planet is dominated.
	int tribute = 0;
	// The minimum combat rating needed to dominate this planet.
	int defenseThreshold = 4000;
	mutable bool isDefending = false;
	// The defense fleets that should be spawned (in order of specification).
	std::vector<const Fleet *> defenseFleets;
	// How many fleets have been spawned, and the index of the next to be spawned.
	mutable size_t defenseDeployed = 0;
	// Ships that have been created by instantiating its defense fleets.
	mutable std::list<std::shared_ptr<Ship>> defenders;

	Wormhole *wormhole = nullptr;
	std::vector<const System *> systems;
};