/*
 * Copyright (c) Cody Logan <cody@lokken.dev>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "parse-file.h"

static int test_parse_file(const char* testname, const char* infile, const char* outfile) {
    FILE* outstream = tmpfile();
    FILE* outptr = fopen(outfile, "r");

    if (outptr == NULL) {
        printf("ERROR: could not read test data file\n");
        return 1;
    }

    // find length of expected output
    fseek(outptr, 0L, SEEK_END);
    const int length = ftell(outptr) + 1;
    rewind(outptr);

    char buffer[length];
    char output[length];

    // read expected output from outfile
    fgets(output, length, outptr);
    fclose(outptr);

    // read expected input from infile and redirect to stdin
    if (freopen(infile, "r", stdin) != NULL) {
        _parse_file(stdin, outstream);
    } else {
        printf("ERROR: could not read test data file\n");
        return 1;
    }
    const int tmp_length = ftell(outstream) + 1;
    rewind(outstream);

    // grab program output
    fgets(buffer, length, outstream);
    fclose(outstream);

    // compare actual output to expected output
    if (strcmp(buffer, output) == 0 && tmp_length == length) {
        printf("%s test succeeded\n", testname);
        return 0;
    } else {
        printf("%s test failed\n", testname);
        printf("%s\n!=\n%s\n", buffer, output);
        return 1;
    }
}

int main(void) {
    printf("\n=============\nRunning Tests\n=============\n");

    int errors = 0;
    //errors += test_parse_file("1. Header", "# header", "<h1 id=\"header\">header</h1>\n");
    //errors += test_parse_file("2. Bold", "*bold*", "<strong>bold</strong>\n");
    errors += test_parse_file("1. Header", "test-1-input.txt", "test-1-output.txt");
    errors += test_parse_file("2. Emphasis", "test-2-input.txt", "test-2-output.txt");

    printf("\n============\nTest Summary\n============\n");
    
    switch (errors) {
        case 0:
            printf("All tests succeeded\n");
            break;
        case 1:
            printf("One test failed\n");
            break;
        default:
            printf("%i tests failed\n", errors);
    }
}