#ifndef PGEXCEPTION_H
#define PGEXCEPTION_H

#include <cassert>
#include <stdexcept>
#include <utility>

namespace Pgsql {

	class ResultCode {
	public:
		explicit ResultCode(std::string result_code)
			: m_resultCode(std::move(result_code))
		{
			assert(m_resultCode.length() == 5);
		}

		std::string getClass() const
		{
			return m_resultCode.substr(1,2);
		}

		/** Helper to easily check the class of the error
		 *
		 */
		bool isClass(const std::string_view cls)
		{
			return m_resultCode.compare(1, 2, cls);
		}

		const std::string& getSpecific() const
		{
			return m_resultCode;
		}
	private:
		std::string m_resultCode;
	};

	class PgException: public std::runtime_error {
    public:
        PgException(const char *msg)
			: std::runtime_error(msg)
        {}
        PgException(std::string msg)
			: std::runtime_error(msg)
		{}
       
        
    private:
        
    };
    
    class PgResultError: public PgException {
    public:
        PgResultError(std::string msg, std::string result_code)
            : PgException(std::move(msg))
			, m_resultCode(result_code)
        {}

		ResultCode getResultCode() const { return m_resultCode; }
	private:
		ResultCode m_resultCode;
    };
    
	class PgConnectionError: public PgResultError {
	public:
        PgConnectionError(const std::string &msg, std::string result_code)
            : PgResultError(msg, std::move(result_code))
        {}

	private:
        
    };
    
    
 
/* postgresq error classes
 *
 * success
 * warning
 * no data
 *
 * 03 sql statement not yet  complete
 * 08 connection exception -> could be resolved by reconnecting / resetting connection
 * 09 triggered action exception
 * 0A feature not supported
 * 0B invalid transaction initiation
 * 0F locator exception
 * 0L invalid grantor
 * 0P invalid role
 * 0Z diagnostic exception
 * 20 case not fount
 * 21 cardinality violation
 * 22 data exception
 * 23 integrity constraint error
 * 24 invalid cursor statement
 * 25 invalid transaction state
 * 26 invalid sql statement name
 * 27 triggered data change violation
 * 28 invalid authorization specification
 * 2B Dependent Privilege Descriptors Still Exist
 * 2D Invalid Transaction Termination
 * 2F SQL Routine Exception
 * 34 Invalid Cursor Name
 * 38 External Routine Exception
 * 39 External Routine Invocation Exception
 * 3B Savepoint Exception
 * 3D Invalid Catalog Name 
 * 3F Invalid Schema Name
 * 40 Transaction Rollback
 * 42 Syntax Error or Access Rule Violation
 * 44 WITH CHECK OPTION Violation
 * 53 Insufficient Resources
 * 54 Program Limit Exceeded
 * 55 Object Not In Prerequisite State
 * 57 Operator Intervention
 * 58 System Error (errors external to PostgreSQL itself)
 * 72 Snapshot Failure
 * F0 Configuration File Error
 * HV Foreign Data Wrapper Error (SQL/MED)
 * P0 PL/pgSQL Error
 * XX Internal Error
 * 
 * At what levels can the communication with postgresql fail
 * - network -> reset/reconnecting
 * - 
 */
}

#endif // PGEXCEPTION_H