#include "my-column.h"
#include "my-selectcommand.h"
#include "my-error.h"
#include <cstring>
#include <boost/date_time/gregorian/gregorian_types.hpp>

MySQL::ColumnBase::ColumnBase(const char * name, unsigned int i) :
	DB::Column(name, i),
	is_null(false),
	length(0)
{
}

bool
MySQL::ColumnBase::isNull() const
{
	return is_null;
}

MySQL::StringColumn::StringColumn(const char * name, unsigned int field, MYSQL_BIND * b, unsigned int len) :
	ColumnBase(name, field),
	value(len),
	length(0)
{
	b->is_null = &is_null;
	b->buffer_type = MYSQL_TYPE_STRING;
	b->is_unsigned = 0;
	b->buffer = value.data();
	b->buffer_length = len;
	b->length = &length;
}

void
MySQL::StringColumn::apply(DB::HandleField & h) const
{
	if (is_null) {
		h.null();
	}
	else {
		h.string({ value.data(), length });
	}
}

MySQL::NullColumn::NullColumn(const char * name, unsigned int field, MYSQL_BIND * b) :
	ColumnBase(name, field)
{
	b->is_null = &is_null;
	b->buffer_type = MYSQL_TYPE_NULL;
	b->buffer = nullptr;
	b->buffer_length = 0;
}

void
MySQL::NullColumn::apply(DB::HandleField & h) const
{
	h.null();
}

namespace MySQL {
	template <class T, enum_field_types MT> Column<T, MT>::Column(const char * name, unsigned int field, MYSQL_BIND * b) :
		ColumnBase(name, field)
	{
		b->is_null = &is_null;
		b->buffer_type = MT;
		b->is_unsigned = 0;
		b->buffer = &value;
		b->buffer_length = sizeof(T);
	}

	template <> void Column<int64_t, MYSQL_TYPE_LONGLONG>::apply(DB::HandleField & h) const
	{
		if (is_null) {
			h.null();
		}
		else {
			h.integer(value);
		}
	}
	template <> void Column<double, MYSQL_TYPE_DOUBLE>::apply(DB::HandleField & h) const
	{
		if (is_null) {
			h.null();
		}
		else {
			h.floatingpoint(value);
		}
	}
	template <> void Column<MYSQL_TIME, MYSQL_TYPE_DATETIME>::apply(DB::HandleField & h) const
	{
		if (is_null) {
			h.null();
		}
		else {
			h.timestamp(boost::posix_time::ptime(
						boost::gregorian::date(value.year, value.month, value.day),
						boost::posix_time::time_duration(value.hour, value.minute, value.second) + boost::posix_time::microseconds(value.second_part)));
		}
	}
	template <> void Column<MYSQL_TIME, MYSQL_TYPE_TIME>::apply(DB::HandleField & h) const
	{
		if (is_null) {
			h.null();
		}
		else {
			h.interval(
						boost::posix_time::time_duration(value.hour, value.minute, value.second) + boost::posix_time::microseconds(value.second_part));
		}
	}

	template class Column<int64_t, MYSQL_TYPE_LONGLONG>;
	template class Column<double, MYSQL_TYPE_DOUBLE>;
	template class Column<MYSQL_TIME, MYSQL_TYPE_DATETIME>;
	template class Column<MYSQL_TIME, MYSQL_TYPE_TIME>;
}