#include "sqlite3_query_result.h"

#include "./sqlite/sqlite3.h"
#include "core/string/print_string.h"
#include "core/string/ustring.h"
#include <cstdio>

bool Sqlite3QueryResult::next_row() {
	return ++current_row < rows.size();
}

String Sqlite3QueryResult::get_cell(const int index) {
	return rows[current_row]->cells[index].data;
}

bool Sqlite3QueryResult::is_cell_null(const int index) {
	return rows[current_row]->cells[index].null;
}

int Sqlite3QueryResult::get_last_insert_rowid() {
	return sqlite3_last_insert_rowid(_connection);
}

String Sqlite3QueryResult::get_error_message() {
	return String(err_msg);
}

void Sqlite3QueryResult::query(const String &query, sqlite3 *conn) {
	_connection = conn;

	CharString q = query.utf8();

	if (sqlite3_exec(conn, q.get_data(), Sqlite3QueryResult::run_query_finished, this, &err_msg) != SQLITE_OK) {
		ERR_PRINT("SQLite3Database::query error: ");
		ERR_PRINT("Query: " + query);
		ERR_PRINT("Error: " + String(err_msg));
		sqlite3_free(err_msg);
	}
}

int Sqlite3QueryResult::run_query_finished(void *data, int argc, char **argv, char **col_names) {
	Sqlite3QueryResult *res = reinterpret_cast<Sqlite3QueryResult *>(data);

	//res->col_names = col_names;

	Sqlite3QueryResultRow *r = memnew(Sqlite3QueryResultRow);

	for (int i = 0; i < argc; ++i) {
		Cell c;

		if (argv[i]) {
			c.data = String::utf8(argv[i]);
		} else {
			c.null = true;
		}

		r->cells.push_back(c);
	}

	res->rows.push_back(r);

	return 0;
}

Sqlite3QueryResult::Sqlite3QueryResult() {
	err_msg = nullptr;
	current_row = -1;
}

Sqlite3QueryResult::~Sqlite3QueryResult() {
	for (int i = 0; i < rows.size(); ++i) {
		memdelete(rows[i]);
	}
}