#pragma once

#include "common.h"
#include <QHash>

class ScopeFieldsSetter;
class DataContext;

/// <summary>
/// 解析解构
/// </summary>
class ExtractStruct : public Serializable {
public:
	/// <summary>
	/// 注册自身
	/// </summary>
	/// <param typeAlias="inst"></param>
	virtual void registSubField(std::shared_ptr<ScopeFieldsSetter> inst) const = 0;

	/// <summary>
	/// 解析所用的字节数量
	/// </summary>
	/// <returns></returns>
	virtual int countWithin() const = 0;

	/// <summary>
	/// 执行解析过程
	/// </summary>
	/// <param typeAlias="bytes"></param>
	/// <returns></returns>
	virtual void parse(const QByteArray& bytes, std::shared_ptr<DataContext> out) const = 0;
};

/// <summary>
/// 翻译单元抽象接口
/// </summary>
class ExtractDelegate : public ExtractStruct {
public:
	/// <summary>
	/// 基础类型
	/// </summary>
	/// <returns></returns>
	virtual QString unitType() const = 0;

	/// <summary>
	/// 输出数据类型
	/// </summary>
	/// <returns></returns>
	virtual DataType outType() const = 0;

	/// <summary>
	/// 单元类型名称
	/// </summary>
	/// <returns></returns>
	virtual QString aliasName() const = 0;
	/// <summary>
	/// 设置单元类型名称
	/// </summary>
	/// <param name="type"></param>
	virtual void setAlias(const QString& name) = 0;
};

/// <summary>
/// 字段代理
/// </summary>
class ExtractUnit : public ExtractStruct {
public:
	/// <summary>
	/// 基础单元类型
	/// </summary>
	/// <returns></returns>
	virtual QString baseType() const = 0;

	/// <summary>
	/// 字段名称
	/// </summary>
	/// <returns></returns>
	virtual QString name() const = 0;
	virtual void setName(const QString& name) = 0;

	/// <summary>
	/// 设置偏移字节数量
	/// </summary>
	/// <param typeAlias="bytes"></param>
	virtual bool setOffsetSpan(int bytes) = 0;
	/// <summary>
	/// 获取解析偏移字节数量
	/// </summary>
	/// <returns></returns>
	virtual int offsetSpan() const = 0;
};


class SizeProvider;
class RuleMatch;
namespace extract {
	class AbstractExtractor : public ExtractDelegate {
	private:
		struct __Private {
			QString typename_store = "";
			DataType type_store = DataType::Integer;
			QString name_alias = "";
			int byte_count = 1;
		} _abs_data;

	public:
		AbstractExtractor(const QString& name, DataType data);
		virtual bool setCountWithin(int bytes);

		// ExtractDelegate ===========================
		QString unitType() const override;
		virtual DataType outType() const;
		int countWithin() const override;
		QString aliasName() const override;
		void setAlias(const QString& name) override;

		// ExtractStruct ============================
		void registSubField(std::shared_ptr<ScopeFieldsSetter> inst) const override;

		// Serializable ==============================
		void loadFrom(std::shared_ptr<TranslateBasic> core, const QJsonObject& obj) override;
		void saveTo(QJsonObject& obj) const override;
	};

	/// <summary>
	/// 转换源数值未16进制数值，默认分割方式
	/// </summary>
	class AsHex : public AbstractExtractor {
	public:
		static QString topic();
		AsHex();

		void parse(const QByteArray& bytes, std::shared_ptr<DataContext> out) const override;
		std::shared_ptr<Serializable> newDefault() const override;
	};

	/// <summary>
	/// 转换源数值为位联合
	/// </summary>
	class AsBitCombine : public AbstractExtractor {
	private:
		struct __Private {
			QHash<int, QString> _switch_options;
		} _combine;

	public:
		static QString topic();
		AsBitCombine();

		bool setSwitchOption(int bit_index, const QString& keyword);
		QHash<int, QString> switchOptions() const;
		virtual void clearOptions();

		// ExtractDelegate ============================
		void parse(const QByteArray& bytes, std::shared_ptr<DataContext> out) const override;

		// Serializable ==============================
		void loadFrom(std::shared_ptr<TranslateBasic> core, const QJsonObject& obj) override;
		void saveTo(QJsonObject& obj) const override;
		std::shared_ptr<Serializable> newDefault() const override;
	};

	/// <summary>
	/// 转换源数据为整形
	/// </summary>
	class AsInteger : public AbstractExtractor {
	public:
		static QString topic();
		AsInteger();

		// ExtractDelegate ============================
		bool setCountWithin(int bytes) override;
		void parse(const QByteArray& bytes, std::shared_ptr<DataContext> out) const override;

		// Serializable ==============================
		std::shared_ptr<Serializable> newDefault() const override;
	};

	/// <summary>
	/// 转换源数据为整形
	/// </summary>
	class AsUnsigned : public AbstractExtractor {
	public:
		static QString topic();
		AsUnsigned();

		// ExtractDelegate ============================
		bool setCountWithin(int bytes) override;
		void parse(const QByteArray& bytes, std::shared_ptr<DataContext> out) const override;

		// Serializable ==============================
		std::shared_ptr<Serializable> newDefault() const override;
	};

	/// <summary>
	/// 转换源数据为字符串
	/// </summary>
	class AsString : public AbstractExtractor {
	private:
		struct __Private {
			QTextCodec* _conv_with = nullptr;
		} _strings;

	public:
		static QString topic();
		AsString();

		void setStrCodec(QTextCodec* ins);
		QString codecName() const;

		// ExtractDelegate ============================
		void parse(const QByteArray& bytes, std::shared_ptr<DataContext> out) const override;

		// Serializable ==============================
		void loadFrom(std::shared_ptr<TranslateBasic> core, const QJsonObject& obj) override;
		void saveTo(QJsonObject& obj) const override;
		std::shared_ptr<Serializable> newDefault() const override;
	};

	class AsFloat : public AbstractExtractor {
	public:
		static QString topic();
		AsFloat();

		void parse(const QByteArray& bytes, std::shared_ptr<DataContext> out) const override;
		std::shared_ptr<Serializable> newDefault() const override;
	};

	class AsDouble : public AbstractExtractor {
	public:
		static QString topic();
		AsDouble();

		void parse(const QByteArray& bytes, std::shared_ptr<DataContext> out) const override;
		std::shared_ptr<Serializable> newDefault() const override;
	};

	class AsRuleSet : public ExtractDelegate {
	private:
		struct __Private {
			QString alias_name = "";
			QList<std::shared_ptr<ExtractUnit>> sub_units;

			int count_within_rt = 0;
		}_bind;

	public:
		static QString topic();

		QList<QString> fieldNames() const;
		std::shared_ptr<ExtractUnit> operator[](const QString& field) const;

		int memberCount() const;
		std::shared_ptr<ExtractUnit> operator[](int index) const;
		void replace(int index, std::shared_ptr<ExtractUnit> inst);
		void removeAt(int index);
		AsRuleSet& append(std::shared_ptr<ExtractUnit> u);

	public:
		QString unitType() const override;
		void registSubField(std::shared_ptr<ScopeFieldsSetter> inst) const override;
		DataType outType() const override;
		int countWithin() const override;

		QString aliasName() const override;
		void setAlias(const QString& name) override;

		void loadFrom(std::shared_ptr<TranslateBasic> core, const QJsonObject& obj) override;
		void saveTo(QJsonObject& obj) const override;

		void parse(const QByteArray& bytes, std::shared_ptr<DataContext> out) const override;
		std::shared_ptr<Serializable> newDefault() const override;

	};


	class SingleBasedUnit : public ExtractUnit {
	private:
		struct __Private {
			QString _field_name = "";
			int _bytes_offset = 0;
			std::shared_ptr<ExtractDelegate> _delegate_inst = nullptr;
		} _inst;

	public:
		std::shared_ptr<ExtractDelegate> delegateInst() const;
		void setDelegate(std::shared_ptr<ExtractDelegate> inst);

	public:
		static QString topic();
		QString baseType() const;
		QString name() const override;
		void setName(const QString& name) override;

		bool setOffsetSpan(int bytes) override;
		int offsetSpan() const override;

		virtual int countWithin() const;

		void registSubField(std::shared_ptr<ScopeFieldsSetter> inst) const override;
		void parse(const QByteArray& bytes, std::shared_ptr<DataContext> out) const override;

		void loadFrom(std::shared_ptr<TranslateBasic> core, const QJsonObject& obj) override;
		void saveTo(QJsonObject& obj) const override;
		std::shared_ptr<Serializable> newDefault() const override;
	};

	class ListBasedUnit : public ExtractUnit {
	private:
		struct __Private {
			QString field_name = "";
			int bytes_offset = 0;
			std::shared_ptr<SizeProvider> size_provider_inst = nullptr;
			std::shared_ptr<ExtractDelegate> delegate_inst = nullptr;

			int count_with_runtime = 0;
		} _list;

	public:
		void setSizeProvider(std::shared_ptr<SizeProvider> inst);
		std::shared_ptr<SizeProvider> sizeProvider() const;

		void setDelegate(std::shared_ptr<ExtractDelegate> inst);
		std::shared_ptr<ExtractDelegate> delegateInst() const;

	public:
		static QString topic();
		QString baseType() const;
		QString name() const override;
		void setName(const QString& name) override;

		void registSubField(std::shared_ptr<ScopeFieldsSetter> inst) const override;
		bool setOffsetSpan(int bytes) override;
		int offsetSpan() const override;
		int countWithin() const override;

		void loadFrom(std::shared_ptr<TranslateBasic> core, const QJsonObject& obj) override;
		void saveTo(QJsonObject& obj) const override;

		void parse(const QByteArray& bytes, std::shared_ptr<DataContext> out) const override;
		std::shared_ptr<Serializable> newDefault() const override;
	};

	class UnionBasedUnit : public ExtractUnit {
	private:
		struct __Private {
			int bytes_offset = 0;
			int bytes_count = 1;
			QString alias_name = "";
			QList<std::shared_ptr<RuleMatch>> rulematch_list;
		} _union;

	public:
		void updateMatch(int index, std::shared_ptr<RuleMatch> rule);
		QList<std::shared_ptr<RuleMatch>> matchRules() const;
		void clearRules();
		void setCountWithin(int count);

	public:
		static QString topic();
		QString baseType() const override;
		void registSubField(std::shared_ptr<ScopeFieldsSetter> inst) const override;

		QString name() const override;
		void setName(const QString& name) override;
		bool setOffsetSpan(int bytes) override;
		int offsetSpan() const override;
		int countWithin() const override;

		void loadFrom(std::shared_ptr<TranslateBasic> core, const QJsonObject& obj) override;
		void saveTo(QJsonObject& obj) const override;

		void parse(const QByteArray& bytes, std::shared_ptr<DataContext> out) const override;
		std::shared_ptr<Serializable> newDefault() const override;
	};
}