// Copyright (c) 2005, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of the Aegisub Group nor the names of its contributors
//     may be used to endorse or promote products derived from this software
//     without specific prior written permission.
//
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// Aegisub Project http://www.aegisub.org/

/// @file ass_override.h
/// @see ass_override.cpp
/// @ingroup subs_storage
///

#include <memory>
#include <vector>

class AssDialogueBlockOverride;

/// Type of parameter
enum class AssParameterClass {
	NORMAL,
	ABSOLUTE_SIZE,
	ABSOLUTE_POS_X,
	ABSOLUTE_POS_Y,
	RELATIVE_SIZE_X,
	RELATIVE_SIZE_Y,
	RELATIVE_TIME_START,
	RELATIVE_TIME_END,
	KARAOKE,
	DRAWING,
	ALPHA,
	COLOR
};

enum class VariableDataType {
	INT,
	FLOAT,
	TEXT,
	BOOL,
	BLOCK
};

/// A single parameter to an override tag
class AssOverrideParameter {
	std::string value;
	mutable std::unique_ptr<AssDialogueBlockOverride> block;
	VariableDataType type;

public:
	AssOverrideParameter(VariableDataType type, AssParameterClass classification);
	AssOverrideParameter(AssOverrideParameter&&) = default;
	AssOverrideParameter& operator=(AssOverrideParameter&&) = default;
	~AssOverrideParameter();

	/// Type of parameter
	AssParameterClass classification;

	/// Is this parameter actually present?
	bool omitted = true;

	VariableDataType GetType() const { return type; }
	template<class T> void Set(T param);
	template<class T> T Get() const;
	template<class T> T Get(T def) const {
		return !omitted ? Get<T>() : def;
	}
};

class AssOverrideTag {
	bool valid = false;

public:
	AssOverrideTag() = default;
	AssOverrideTag(std::string const& text);
	AssOverrideTag(AssOverrideTag&&) = default;
	AssOverrideTag& operator=(AssOverrideTag&&) = default;

	std::string Name;
	std::vector<AssOverrideParameter> Params;

	bool IsValid() const { return valid; }
	void Clear();
	void SetText(const std::string &text);
	operator std::string() const;
};