#include <stdlib.h>
#include "tape.h"
#include "record.h"
#include "common.h"

#define WANT_IOSTAT  1
#define WANT_SUMMARY 2

char* filename;
char flags;

void init_args(int args, char* argv[])
{
    optparse_t options;
    optparse_init(&options, argv);

    for (char opt; opt != -1; opt = optparse(&options, "qsvi")) {
        switch (opt) {
            case 'q':
                verbosity--;
                break;
            case 'v':
                verbosity++;
                break;
            case 'i':
                flags |= WANT_IOSTAT;
                break;
            case 's':
                flags |= WANT_SUMMARY;
                break;
        }
    }

    filename = optparse_arg(&options);
}

void help(const char* name) {
    printf(
        "Appends records to given tape at the end.\n"
        "Usage:\n"
        "\t%s [options] <tape>\n"
        "Options:\n"
        "\t-q|v|vv    - verbosity level, q for quiet, v for vervose vv for debug\n"
        "\t-s         - summary of records (R) and runs (S)\n"
        "\t-i         - summary IO stats\n"
        ,
        name
    );
}

int main(int argc, const char* argv[])
{
    if (argc < 2) {
        help(argv[0]);
        return 0;
    }

    tape_t* tape = tape_open(argv[1], TAPE_APPEND);

    record_t record;
    size_t records = 0;

    while (scanf("%lf %lf", &record.x, &record.y) > 0) {
        tape_write(tape, &record, sizeof(record_t));
        printfv(VERBOSITY_NORMAL, "Record created: r = (%lf, %lf) |r| = %lf\n", record.x, record.y, record_length(record));
        records++;
    }

    if (flags & WANT_SUMMARY) {
        printfv(VERBOSITY_NORMAL, "Appended %zu record to %s.\n", records, argv[1]);
    }

    if (flags & WANT_IOSTAT) {
        iostats();
    }

    tape_close(tape);
    return EXIT_SUCCESS;
}