//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
//  SPDX-License-Identifier: GPL-3.0-or-later

#include "statement.h"

#include <cstring>

static uint64_t TIME_LENGTH = sizeof(MYSQL_TIME);

MySQL::Statement::Statement(MYSQL* connection, const char* statement):
    stmt(mysql_stmt_init(connection)),
    param(),
    lengths()
{
    int result = mysql_stmt_prepare(stmt.get(), statement, strlen(statement));
    if (result != 0)
        throw std::runtime_error(std::string("Error preparing statement: ") + mysql_stmt_error(stmt.get()));
}

void MySQL::Statement::bind(void* value, enum_field_types type) {
    MYSQL_BIND& result = param.emplace_back();
    std::memset(&result, 0, sizeof(result));

    result.buffer_type = type;
    result.buffer = value;

   switch (type) {
        case MYSQL_TYPE_STRING:
        case MYSQL_TYPE_VAR_STRING:
            result.length = &lengths.emplace_back(strlen(static_cast<char*>(value)));
            break;
        case MYSQL_TYPE_DATE:
            result.length = &TIME_LENGTH;
            break;
        default:
            lengths.pop_back();
            throw std::runtime_error("Type: " + std::to_string(type) + " is not yet supported in bind");
            break;
    }
}

void MySQL::Statement::execute() {
    int result = mysql_stmt_bind_param(stmt.get(), param.data());
    if (result != 0)
        throw std::runtime_error(std::string("Error binding statement: ") + mysql_stmt_error(stmt.get()));

    result = mysql_stmt_execute(stmt.get());
    if (result != 0)
        throw std::runtime_error(std::string("Error executing statement: ") + mysql_stmt_error(stmt.get()));
}