/**
 * @file reg_test_3625-sqlite3_session_client_error_limit-t.cpp
 * @brief Regression test check that performing a valid connection to ProxySQL SQLite3 server
 *   should be successful when 'client_error_limit' is enabled.
 * @details It performs the following operations:
 *  - Enabling client error limit feature.
 *  - Perform a connection to ProxySQL SQLite3 server.
 */

#include <cstring>
#include <vector>
#include <tuple>
#include <string>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "mysql.h"
#include "mysqld_error.h"

#include "tap.h"
#include "command_line.h"
#include "utils.h"

using query_spec = std::tuple<std::string, int>;

const int sqlite3_port = 0;

int main(int argc, char** argv) {
	CommandLine cl;

	// plan as many tests as queries
	plan(
		/* Enabling 'client_error_limit' succeed */
		2 +
		/* Fail to connect with wrong username and password */ 
		2 +
		/* Correctly connects with proper username and password */
		1
	);

	if (cl.getEnv()) {
		diag("Failed to get the required environmental variables.");
		return EXIT_FAILURE;
	}

	MYSQL* proxysql_admin = mysql_init(NULL);

	// Connect to ProxySQL Admin and check current SQLite3 configuration
	if (
		!mysql_real_connect(
			proxysql_admin, cl.host, cl.admin_username, cl.admin_password,
			NULL, cl.admin_port, NULL, 0
		)
	) {
		fprintf(
			stderr, "File %s, line %d, Error: %s\n", __FILE__, __LINE__,
			mysql_error(proxysql_admin)
		);
		return EXIT_FAILURE;
	}

	{
		std::pair<std::string, int> host_port {};
		int host_port_err = extract_sqlite3_host_port(proxysql_admin, host_port); 
		if (host_port_err) {
			diag("Failed to get and parse 'sqliteserver-mysql_ifaces' at line '%d'", __LINE__);
			goto cleanup;
		}

		// When ProxySQL reports a wildcard listen address (0.0.0.0 or ::), replace it with
		// the actual ProxySQL host so tests running in separate containers can connect.
		if (host_port.first == "0.0.0.0" || host_port.first == "::" || host_port.first == "*") {
			diag(
				"SQLite3 server reported wildcard address '%s'; using ProxySQL host '%s' instead",
				host_port.first.c_str(), cl.host
			);
			host_port.first = std::string(cl.host);
		}

		MYSQL* proxysql_sqlite3 = mysql_init(NULL);

		// Enable 'client_error_limit'
		{
			int err_limit_errno = mysql_query(proxysql_admin, "SET mysql-client_host_cache_size=10");
			ok(err_limit_errno == EXIT_SUCCESS, "Successfully updated 'mysql-client_host_cache_size'");
			err_limit_errno = mysql_query(proxysql_admin, "LOAD MYSQL VARIABLES TO RUNTIME");
			ok(err_limit_errno == EXIT_SUCCESS, "Enabled 'client_host_cache_size'");
		}

		// Perform the invalid connections
		{
			// Connect with invalid username
			std::string inv_user_err {};
			bool failed_to_connect = false;
			if (
				!mysql_real_connect(
					proxysql_sqlite3, host_port.first.c_str(), "foobar_user", cl.password,
					NULL, host_port.second, NULL, 0
				)
			) {
				inv_user_err = mysql_error(proxysql_sqlite3);
				failed_to_connect = true;
			}

			ok(
				failed_to_connect,
				"An invalid user should fail to connect to SQLite3 server, error was: %s",
				inv_user_err.c_str()
			);

			// Reinitialize MYSQL handle
			mysql_close(proxysql_sqlite3);
			proxysql_sqlite3 = mysql_init(NULL);

			// Connect with invalid password
			std::string inv_pass_err {};
			failed_to_connect = false;
			if (
				!mysql_real_connect(
					proxysql_sqlite3, host_port.first.c_str(), cl.username, "foobar_pass",
					NULL, host_port.second, NULL, 0
				)
			) {
				inv_pass_err = mysql_error(proxysql_sqlite3);
				failed_to_connect = true;
			}

			ok(
				failed_to_connect,
				"A valid user with incorrect password should fail to connect to SQLite3 server, error was: %s",
				inv_pass_err.c_str()
			);

			// Reinitialize MYSQL handle
			mysql_close(proxysql_sqlite3);
			proxysql_sqlite3 = mysql_init(NULL);
		}

		// Perform the valid connection
		{
			// Correctly connect to SQLite3 server
			MYSQL* connect_errno =
				mysql_real_connect(
					proxysql_sqlite3, host_port.first.c_str(), cl.username, cl.password,
					NULL, host_port.second, NULL, 0
				);

			ok(
				connect_errno != NULL,
				"Connection should succeed when using a valid 'username:password' (%s:%s)",
				cl.username, cl.password
			);
			mysql_close(proxysql_sqlite3);
		}
	}

cleanup:

	mysql_close(proxysql_admin);

	return exit_status();
}
