#pragma once

#include "libsyntax_global.h"
#include <libwords.h>

namespace lib_token {

	/**
	 * @brief 解析异常
	 */
	class LIBSYNTAX_EXPORT TokenException {
	private:
		QString msg_store;

	public:
		TokenException(const QString& message);
		virtual QString message() const;
	};

	/**
	 * @brief token类型定义
	 */
	class ITokenDefine {
	public:
		/**
		 * @brief 整数类型标识.
		 *
		 * \return
		 */
		virtual int typeMark() const = 0;
		/**
		 * @brief 解析机制关键定义
		 * @return
		 */
		virtual QString regex() const = 0;
	};

	/**
	 * @brief token解析结果
	 */
	class IToken : public lib_words::IWordBase {
	public:
		/**
		 * @brief token解析机制关联
		 * @return
		 */
		virtual std::shared_ptr<const ITokenDefine> defines() const = 0;
		/**
		* @brief 上一个Token
		* @return
		*/
		virtual std::shared_ptr<const IToken> previousToken() const = 0;
	};

	/**
	* @brief token解析机制定义
	*/
	class ITokenProcess : public ITokenDefine {
	public:
		/**
		 * @brief 解析机制名称
		 * @return
		 */
		virtual QString reviseWords() const = 0;
		/**
		 * @brief 解析词语处理过程
		 * @param content 词语
		 * @return tuple<token/null,remains> 解析结果
		 */
		virtual std::tuple<std::shared_ptr<const IToken>, std::shared_ptr<const lib_words::IPrimitiveWord>>
			analysis(std::shared_ptr<const lib_words::IPrimitiveWord> content) const = 0;
	};

	/**
	 * @brief 词法解析成果
	 */
	class TokenContent : public IToken {
	private:
		int row_n, col_n, doc_offset;
		QString text_n, path_p;
		std::shared_ptr<const ITokenDefine> type_def;

	public:
		/**
		* @brief 词法解析内容
		* @param r 行
		* @param c 列
		* @param pos 位置
		* @param t 内容
		* @param p path
		* @param paramType 类型定义
		*/
		TokenContent(int r, int c, uint64_t pos, const QString& t, const QString& p, std::shared_ptr<const ITokenDefine> paramType);

		// WordBase interface
	public:
		virtual QString file() const override;
		virtual uint64_t position() const override;
		virtual QString content() const override;
		virtual int row() const override;
		virtual int column() const override;

		// Token interface
	public:
		virtual std::shared_ptr<const ITokenDefine> defines() const override;
		virtual std::shared_ptr<const IToken> previousToken() const override;
	};

	class TokenChain : public IToken {
	private:
		std::shared_ptr<const IToken> _token_previous;
		std::shared_ptr<const IToken> _token_content;

	public:
		TokenChain(std::shared_ptr<const IToken> content, std::shared_ptr<const IToken> prev);

		// 通过 IToken 继承
		QString file() const override;
		uint64_t position() const override;
		QString content() const override;
		int row() const override;
		int column() const override;
		std::shared_ptr<const ITokenDefine> defines() const override;
		std::shared_ptr<const IToken> previousToken() const override;
	};
}