/*
 * Copyright (c) 2011 Alex Hornung <alex@alexhornung.com>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/resource.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>

#include <errno.h>
#include <limits.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <pwd.h>

#include <err.h>

#include <libprop/proplib.h>

#include "parser.h"
#include "testcase.h"
#include "runlist.h"
#include "userland.h"
#include "kernel.h"
#include <dfregress.h>

char output_file[PATH_MAX+1];
char testcase_dir[PATH_MAX+1];
char prepost_dir[PATH_MAX+1];

prop_array_t
runlist_load_from_text(const char *runlist_file)
{
        prop_array_t runlist;

        runlist = prop_array_create_with_capacity(2048);

        process_file(runlist_file, testcase_entry_parser, runlist, NULL);

        return runlist;
}

prop_array_t
runlist_load(const char *runlist_file)
{
        return prop_array_internalize_from_file(runlist_file);
}

int
runlist_save(const char *runlist_file, prop_array_t runlist)
{
        return !prop_array_externalize_to_file(runlist, runlist_file);
}

int
runlist_iterate(prop_array_t runlist, runlist_iterator_t iterator, void *arg)
{
        prop_object_iterator_t it;
        prop_dictionary_t testcase;
        int r = 0;

        it = prop_array_iterator(runlist);
        if (it == NULL)
                err(1, "could not get runlist iterator");

        while ((testcase = prop_object_iterator_next(it)) != NULL) {
                r = iterator(arg, testcase);
                if (r != 0)
                        break;
        }

        prop_object_iterator_release(it);
        return r;
}

int
runlist_run_test(void *arg, prop_dictionary_t testcase)
{
        prop_array_t runlist = (prop_array_t)arg;
        struct testcase_result tr;
        char testcase_path[FILENAME_MAX+2];
        char testcase_dir_only[FILENAME_MAX];
        char prepost_path[FILENAME_MAX+2];
        char errbuf[FILENAME_MAX*2];
        int r, nopre, nopost;
        char *str;

        sprintf(testcase_path, "%s/%s", testcase_dir,
            testcase_get_name(testcase));
        strcpy(testcase_dir_only, testcase_path);
        str = strrchr(testcase_dir_only, '/');
        if (str != NULL)
                *str = '\0';

        printf("Running testcase %s... ", testcase_get_name(testcase));
        fflush(stdout);

        /* Switch to testcase directory */
        r = chdir(testcase_dir_only);
        if (r < 0) {
                sprintf(errbuf, "could not switch working directory to %s: %s\n",
                    testcase_dir_only, strerror(errno));
                testcase_set_result(testcase, RESULT_PREFAIL);
                testcase_set_sys_buf(testcase, errbuf);
                goto out;
        }

        /* build unless nobuild flag is set */
        if ((testcase_get_flags(testcase) & TESTCASE_NOBUILD) == 0) {
                r = run_simple_cmd(testcase_get_make_cmd(testcase), NULL,
                    errbuf, sizeof(errbuf), &tr);
                if (r != 0) {
                        testcase_set_sys_buf(testcase, errbuf);
                        testcase_set_result(testcase, RESULT_PREFAIL);
                        goto out;
                }

                if (tr.stdout_buf != NULL) {
                        testcase_set_build_buf(testcase, tr.stdout_buf);
                        free(tr.stdout_buf);
                }

                if (tr.result != RESULT_PASS) {
                        if (testcase_get_type(testcase)
                            == TESTCASE_TYPE_BUILDONLY)
                                testcase_set_result(testcase, tr.result);
                        else
                                testcase_set_result(testcase, RESULT_BUILDFAIL);

                        testcase_set_exit_value(testcase, tr.exit_value);
                        testcase_set_signal(testcase, tr.signal);

                        goto out;
                }
        }


        /* Pre-execution run */
        switch (testcase_get_precmd_type(testcase)) {
        case TESTCASE_INT_PRE:
                /* Test case has internal but explicit PRE - code */
                r = run_simple_cmd(testcase_path, "pre", errbuf,
                    sizeof(errbuf), &tr);
                nopre = 0;
                break;

        case TESTCASE_CUSTOM_PRE:
                /* Test case uses external and explicit PRE command */
                sprintf(prepost_path, "%s/%s", prepost_dir,
                    testcase_get_custom_precmd(testcase));

                r = run_simple_cmd(prepost_path, NULL, errbuf, sizeof(errbuf),
                    &tr);
                nopre = 0;
                break;

        default:
                nopre = 1;
                r = 0;
                break;
        }

        if (!nopre) {
                if (r != 0) {
                        testcase_set_sys_buf(testcase, errbuf);
                        testcase_set_result(testcase, RESULT_PREFAIL);
                        goto out;
                }

                if (tr.stdout_buf != NULL) {
                        testcase_set_precmd_buf(testcase, tr.stdout_buf);
                        free(tr.stdout_buf);
                }

                if (tr.result != RESULT_PASS) {
                        testcase_set_result(testcase, RESULT_PREFAIL);
                        goto out;
                }
        }

        switch (testcase_get_type(testcase)) {
        case TESTCASE_TYPE_BUILDONLY:
                testcase_set_result(testcase, RESULT_PASS);
                testcase_set_exit_value(testcase, 0);
                break;

        case TESTCASE_TYPE_USERLAND:
                /* Main testcase execution */
                r = run_userland(testcase_path,
                    testcase_get_argc(testcase),
                    testcase_get_args(testcase),
                    testcase_get_interpreter_noexit(testcase),
                    testcase_needs_setuid(testcase),
                    testcase_get_runas_uid(testcase),
                    testcase_get_timeout(testcase),
                    testcase_get_rc(testcase),
                    0, errbuf, sizeof(errbuf), &tr);

                if (r == 0) {
                        testcase_set_result(testcase, tr.result);
                        testcase_set_exit_value(testcase, tr.exit_value);
                        testcase_set_signal(testcase, tr.signal);

                        if (tr.stdout_buf != NULL) {
                                testcase_set_stdout_buf(testcase, tr.stdout_buf);
                                free(tr.stdout_buf);
                        }

                        if (tr.stderr_buf != NULL) {
                                testcase_set_stderr_buf(testcase, tr.stderr_buf);
                                free(tr.stderr_buf);
                        }
                } else {
                        /* driver/monitor error */
                        testcase_set_sys_buf(testcase, errbuf);
                }

                break;

        case TESTCASE_TYPE_KERNEL:
                run_kernel(testcase_path, testcase);
                break;
        }


        /* Post-execution run */
        switch (testcase_get_postcmd_type(testcase)) {
        case TESTCASE_INT_POST:
                /* Test case has internal but explicit POST - code */
                r = run_simple_cmd(testcase_path, "post", errbuf,
                    sizeof(errbuf), &tr);
                nopost = 0;
                break;

        case TESTCASE_CUSTOM_POST:
                /* Test case uses external and explicit POST command */
                sprintf(prepost_path, "%s/%s", prepost_dir,
                    testcase_get_custom_postcmd(testcase));

                r = run_simple_cmd(prepost_path, NULL, errbuf, sizeof(errbuf),
                    &tr);
                nopost = 0;
                break;

        default:
                r = 0;
                nopost = 1;
                break;
        }

        if (!nopost) {
                if (r != 0) {
                        testcase_set_sys_buf(testcase, errbuf);
                        testcase_set_result(testcase, RESULT_POSTFAIL);
                        goto out;
                }

                if (tr.stdout_buf != NULL) {
                        testcase_set_postcmd_buf(testcase, tr.stdout_buf);
                        free(tr.stdout_buf);
                }

                if (tr.result != RESULT_PASS) {
                        testcase_set_result(testcase, RESULT_POSTFAIL);
                        goto out;
                }
        }



out:
        /* clean build unless nobuild flag is set */
        if ((testcase_get_flags(testcase) & TESTCASE_NOBUILD) == 0) {
                r = run_simple_cmd(testcase_get_make_cmd(testcase), "clean",
                    errbuf, sizeof(errbuf), &tr);

                if (tr.stdout_buf != NULL) {
                        testcase_set_cleanup_buf(testcase, tr.stdout_buf);
                        free(tr.stdout_buf);
                }

                if (r != 0)
                        testcase_set_cleanup_buf(testcase, errbuf);
        }


        /* ... and save results */
        runlist_save(output_file, runlist);

        printf("done.\n");
        return 0;
}