#pragma once

#include "quest/QuestTypes.h"
#include "ISaveable.h"
#include "external/nlohmann/json.hpp"
#include <string>
#include <unordered_map>
#include <vector>

namespace FRG::Quest {

enum class QuestEventType {
	Unlocked,
	Completed,
	Failed,
	ObjectiveCompleted
};

struct QuestEvent {
	QuestEventType type;
	std::string questId;
	std::string objectiveId;
};

struct QuestMutationResult {
	bool success = false;
	std::vector<QuestEvent> events;
};

class QuestJournal : public FRG::ISaveable {
public:
	bool loadFromFile(const std::string& path, const std::string& zipFile = "");

	// Reloads quest definitions (e.g. after a language switch) while
	// preserving current progress: snapshots status/objective state, reloads
	// definitions from path, then re-applies the snapshot.
	bool reloadDefinitionsPreservingState(const std::string& path, const std::string& zipFile = "");

	void save(nlohmann::json& out) const override;
	void load(const nlohmann::json& in) override;

	QuestMutationResult unlockQuest(const std::string& questId);
	QuestMutationResult completeQuest(const std::string& questId);
	QuestMutationResult failQuest(const std::string& questId);

	QuestMutationResult setObjectiveCompleted(const std::string& questId, const std::string& objectiveId, bool completed = true);
	QuestMutationResult setObjectiveVisible(const std::string& questId, const std::string& objectiveId, bool visible = true);
	QuestMutationResult setActiveObjective(const std::string& questId, int objectiveIndex);

	QuestState* findQuest(const std::string& questId);
	const QuestState* findQuest(const std::string& questId) const;

	std::vector<QuestState*> getVisibleQuests();
	std::vector<const QuestState*> getVisibleQuests() const;

private:
	std::unordered_map<std::string, QuestState> quests;
	std::vector<std::string> questOrder;

	bool setStatus(const std::string& questId, QuestStatus status);
};

} // namespace FRG::Quest