// -*- mode: c++; c-basic-offset:4 -*-

// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.

// Copyright (c) 2002,2003,2006 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.

#include <sys/stat.h>
#include <sys/types.h>

#include "config.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#include <cstdlib>
#include <cstring>

#include <fstream>
#include <iostream>
#include <string>

#include <cppunit/TextTestRunner.h>
#include <cppunit/extensions/HelperMacros.h>
#include <cppunit/extensions/TestFactoryRegistry.h>

// #define DODS_DEBUG
#include "RCReader.h"
#include "debug.h"
#include "run_tests_cppunit.h"
#include "test_config.h"

using namespace CppUnit;
using namespace std;

static char dods_conf_ev[1024] = "";

namespace libdap {

class RCReaderTest : public TestFixture {
private:
    RCReader *rcr;

protected:
public:
    RCReaderTest() : rcr(RCReader::instance()) {}

    void setUp() {}

    void tearDown() {}

    /** Put values in an environment variable. This should be used only
     * for the env var 'DODS_CONF' and should never pass in values longer
     * than 1024 characters. The 'value' must include the DODS_CONF= text.
     *
     * @note this is used because environment variables use static storage,
     * so any value passed in from the heap that might be freed or from the
     * stack that could be popped will cause a memory access error.
     */
    void my_putenv(const string &value) {
        strncpy(dods_conf_ev, value.c_str(), 1024);
        ;
        putenv(dods_conf_ev);
    }

    CPPUNIT_TEST_SUITE(RCReaderTest);

    CPPUNIT_TEST(check_env_var_test1);
    CPPUNIT_TEST(check_env_var_test2);
    CPPUNIT_TEST(check_env_var_test3);
    CPPUNIT_TEST(check_env_var_test4);
    CPPUNIT_TEST(check_env_var_test5);
    CPPUNIT_TEST(instance_test1);
    CPPUNIT_TEST(instance_test2);
    CPPUNIT_TEST(proxy_test1);
    CPPUNIT_TEST(proxy_test2);
    CPPUNIT_TEST(proxy_test3);
    CPPUNIT_TEST(proxy_test4);
    CPPUNIT_TEST(proxy_test5);
    CPPUNIT_TEST(validate_ssl_test);

    CPPUNIT_TEST_SUITE_END();

    void check_env_var_test1() {
        my_putenv("DODS_CONF=");
        CPPUNIT_ASSERT(rcr->check_env_var("DODS_CONF") == "");
    }

    void check_env_var_test2() {
        my_putenv("DODS_CONF=Nothing_sensible");
        CPPUNIT_ASSERT(rcr->check_env_var("DODS_CONF") == "");
    }

    void check_env_var_test3() {
        my_putenv("DODS_CONF=/etc/passwd");
        CPPUNIT_ASSERT(rcr->check_env_var("DODS_CONF") == "/etc/passwd");
    }

    void check_env_var_test4() {
        // Set DODS_CONF to the CWD plus .dodsrc, create file called .dodsrc
        // in the CWD and test to see if check_env_var finds it.
        char cwd[1024];
        getcwd(cwd, 1024);

        string rc = string(cwd) + string("/.dodsrc");
        ifstream ifp(rc.c_str()); // This should create .dodsrc in the CWD

        my_putenv(string("DODS_CONF=") + string(cwd));

        // Return existing file
        CPPUNIT_ASSERT(rcr->check_env_var("DODS_CONF") == rc);
        remove(rc.c_str());
    }

    void check_env_var_test5() {
        // In this test we *don't* create the file, just set DODS_CONF to the
        // directory and see if check_env_var() makes the RC file.
        char cwd[1024];
        getcwd(cwd, 1024);

        my_putenv(string("DODS_CONF=") + string(cwd));

        // Create the file.
        string rc = string(cwd) + string("/.dodsrc");
        CPPUNIT_ASSERT(rcr->check_env_var("DODS_CONF") == rc);
        struct stat stat_info;
        CPPUNIT_ASSERT(stat(rc.c_str(), &stat_info) == 0 && S_ISREG(stat_info.st_mode));
        remove(rc.c_str());
    }

    void instance_test1() {
        // This test assumes that HOME *is* defined. We should find the
        // .dodsrc there. If it's not there, we should create one there.
        my_putenv("DODS_CONF=");
        string home = getenv("HOME");
        if (*home.rbegin() != '/')
            home += "/";
        RCReader::delete_instance();
        RCReader::initialize_instance();
        RCReader *reader = RCReader::instance();
        CPPUNIT_ASSERT(reader->d_rc_file_path == home + string(".dodsrc"));
        DBG(cerr << "Cache root: " << reader->get_dods_cache_root() << endl);
        CPPUNIT_ASSERT(reader->get_dods_cache_root() == home + string(".dods_cache/"));
    }

    void instance_test2() {
        // Set DODS_CONF to create a .dodsrc in the CWD, then check to make
        // sure that .dodsrc has the correct cache root.
        char cwd[1024];
        getcwd(cwd, 1024);
        DBG(cerr << "CWD: " << cwd << endl);
        string rc = cwd;
        rc += "/.dodsrc";
        DBG(cerr << "RC: " << rc << endl);
        remove(rc.c_str()); // make sure the RC does not exist

        my_putenv(string("DODS_CONF=") + string(cwd));

        RCReader::delete_instance();
        RCReader::initialize_instance();
        RCReader *reader = RCReader::instance();
        DBG(cerr << "RC path: " << reader->d_rc_file_path << endl);
        CPPUNIT_ASSERT(reader->d_rc_file_path == string(cwd) + string("/.dodsrc"));
        DBG(cerr << "Cache root: " << reader->get_dods_cache_root() << endl);
        CPPUNIT_ASSERT(reader->get_dods_cache_root() == string(cwd) + string("/.dods_cache/"));
    }

    // Read the proxy info from rcreader-testsuite/test1.rc
    void proxy_test1() {
        string rc = (string) "DODS_CONF=" + TEST_SRC_DIR + "/rcreader-testsuite/test1.rc";
        DBG(cerr << "rc: " << rc << endl);
        my_putenv(rc);

        RCReader::delete_instance();
        RCReader::initialize_instance();
        RCReader *reader = RCReader::instance();
        DBG(cerr << "RC path: " << reader->d_rc_file_path << endl);
        CPPUNIT_ASSERT(reader->d_rc_file_path == (string)TEST_SRC_DIR + "/rcreader-testsuite/test1.rc");
        CPPUNIT_ASSERT(reader->get_proxy_server_protocol() == "http");

        string proxy = reader->get_proxy_server_host_url();
        CPPUNIT_ASSERT(proxy == "jimg:mypass@proxy.local.org:8080");

        CPPUNIT_ASSERT(reader->get_proxy_server_host() == "proxy.local.org");
        CPPUNIT_ASSERT(reader->get_proxy_server_port() == 8080);
        CPPUNIT_ASSERT(reader->get_proxy_server_userpw() == "jimg:mypass");

        CPPUNIT_ASSERT(reader->is_no_proxy_for_used());
        CPPUNIT_ASSERT(reader->get_no_proxy_for_protocol() == "http");
        CPPUNIT_ASSERT(reader->get_no_proxy_for_host() == "local.org");
    }

    void proxy_test2() {
        string rc = (string) "DODS_CONF=" + TEST_SRC_DIR + "/rcreader-testsuite/test2.rc";
        DBG(cerr << "rc: " << rc << endl);
        my_putenv(rc);

        RCReader::delete_instance();
        RCReader::initialize_instance();
        RCReader *reader = RCReader::instance();
        DBG(cerr << "RC path: " << reader->d_rc_file_path << endl);
        CPPUNIT_ASSERT(reader->d_rc_file_path == (string)TEST_SRC_DIR + "/rcreader-testsuite/test2.rc");
        CPPUNIT_ASSERT(reader->get_proxy_server_protocol() == "http");

        string proxy = reader->get_proxy_server_host_url();
        DBG(cerr << "get_proxy_server_host_url(): " << proxy << endl);
        CPPUNIT_ASSERT(proxy == "proxy.local.org:80");

        CPPUNIT_ASSERT(reader->get_proxy_server_host() == "proxy.local.org");
        CPPUNIT_ASSERT(reader->get_proxy_server_port() == 80);
        CPPUNIT_ASSERT(reader->get_proxy_server_userpw() == "");
    }

    void proxy_test3() {
        string rc = (string) "DODS_CONF=" + TEST_SRC_DIR + "/rcreader-testsuite/test3.rc";
        DBG(cerr << "rc: " << rc << endl);
        my_putenv(rc);

        try {
            RCReader::delete_instance();
            RCReader::initialize_instance();
            CPPUNIT_ASSERT(!"initialize_instance() should throw Error.");
        } catch (Error &e) {
            DBG(cerr << e.get_error_message() << endl);
            CPPUNIT_ASSERT(e.get_error_message() != "");
        }
    }

    void proxy_test4() {
        string rc = (string) "DODS_CONF=" + TEST_SRC_DIR + "/rcreader-testsuite/test4.rc";
        DBG(cerr << "rc: " << rc << endl);
        my_putenv(rc);

        try {
            RCReader::delete_instance();
            RCReader::initialize_instance();
            RCReader *reader = RCReader::instance();
            DBG(cerr << "RC path: " << reader->d_rc_file_path << endl);
            CPPUNIT_ASSERT(reader->d_rc_file_path == (string)TEST_SRC_DIR + "/rcreader-testsuite/test4.rc");
            CPPUNIT_ASSERT(reader->get_proxy_server_protocol() == "http");

            string proxy = reader->get_proxy_server_host_url();
            DBG(cerr << "get_proxy_server_host_url(): " << proxy << endl);
            CPPUNIT_ASSERT(proxy == "jimg:test@proxy.local.org:3128");

            CPPUNIT_ASSERT(reader->get_proxy_server_host() == "proxy.local.org");
            CPPUNIT_ASSERT(reader->get_proxy_server_port() == 3128);
            CPPUNIT_ASSERT(reader->get_proxy_server_userpw() == "jimg:test");
        } catch (Error &e) {
            DBG(cerr << e.get_error_message() << endl);
            CPPUNIT_ASSERT(e.get_error_message() != "");
        }
    }

    void proxy_test5() {
        string rc = (string) "DODS_CONF=" + TEST_SRC_DIR + "/rcreader-testsuite/test5.rc";
        DBG(cerr << "rc: " << rc << endl);
        my_putenv(rc);

        try {
            RCReader::delete_instance();
            RCReader::initialize_instance();
            RCReader *reader = RCReader::instance();
            DBG(cerr << "RC path: " << reader->d_rc_file_path << endl);
            CPPUNIT_ASSERT(reader->d_rc_file_path == (string)TEST_SRC_DIR + "/rcreader-testsuite/test5.rc");
            string proxy = reader->get_proxy_server_host_url();
            DBG(cerr << "get_proxy_server_host_url(): " << proxy << endl);
            CPPUNIT_ASSERT(reader->get_proxy_server_protocol() == "http");

            CPPUNIT_ASSERT(proxy == "jimg:test@proxy.local.org:3128");

            CPPUNIT_ASSERT(reader->get_proxy_server_host() == "proxy.local.org");
            CPPUNIT_ASSERT(reader->get_proxy_server_port() == 3128);
            CPPUNIT_ASSERT(reader->get_proxy_server_userpw() == "jimg:test");
        } catch (Error &e) {
            DBG(cerr << e.get_error_message() << endl);
            CPPUNIT_ASSERT(e.get_error_message() != "");
        }
    }

    // This simple test checks to see that the VALIDATE_SSL parameter is
    // read correctly.
    void validate_ssl_test() {
        string rc = (string) "DODS_CONF=" + TEST_SRC_DIR + "/rcreader-testsuite/dodssrc_ssl_1";
        DBG(cerr << "rc: " << rc << endl);
        my_putenv(rc);

        RCReader::delete_instance();
        RCReader::initialize_instance();
        RCReader *reader = RCReader::instance();
        reader->read_rc_file(string(TEST_SRC_DIR) + "/rcreader-testsuite/dodssrc_ssl_1");
        // No param set in file
        DBG(cerr << "reader->get_validate_ssl(): " << reader->get_validate_ssl() << endl);
        CPPUNIT_ASSERT(reader->get_validate_ssl() == 1);

        // Param set in file
        // Note that string rc, rc2, and rc3 are used (instead of reusing one
        // string object) because the code casts away the const-ness of the
        // char* returned by c_str() and putenv does odd stuff with it. There's
        // nothing good about using env vars...
        rc = (string) "DODS_CONF=" + TEST_SRC_DIR + "/rcreader-testsuite/dodssrc_ssl_2";
        DBG(cerr << "rc: " << rc << endl);

        my_putenv(rc);

        RCReader::delete_instance();
        RCReader::initialize_instance();
        reader = RCReader::instance();
        DBG(cerr << "reader->check_env_var(\"DODS_CONF\"): " << reader->check_env_var("DODS_CONF") << endl);
        DBG(cerr << "reader->get_validate_ssl(): " << reader->get_validate_ssl() << endl);
        CPPUNIT_ASSERT(reader->get_validate_ssl() == 1);

        // Param cleared in file
        rc = (string) "DODS_CONF=" + TEST_SRC_DIR + "/rcreader-testsuite/dodsrc_ssl_3";
        DBG(cerr << "rc: " << rc << endl);

        my_putenv(rc);

        RCReader::delete_instance();
        RCReader::initialize_instance();
        reader = RCReader::instance();
        DBG(cerr << "reader->get_validate_ssl(): " << reader->get_validate_ssl() << endl);
        CPPUNIT_ASSERT(reader->get_validate_ssl() == 0);
    }
};

CPPUNIT_TEST_SUITE_REGISTRATION(RCReaderTest);

} // namespace libdap

int main(int argc, char *argv[]) { return run_tests<libdap::RCReaderTest>(argc, argv) ? 0 : 1; }