#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "aocutils.h"
#include "aocdailies.h" // prototypes for all aocYYYYdd functions!

#define MAX_YEAR 2024

int main(int argc, char **argv) {
    int y = 0, d = 0;
    char dataname[99];
    if (argc >= 3) {
        char *err;
        y = (int)strtol(argv[1], &err, 10);
        if (err && *err) y = 0;
        if (y < 2015) y = 0;
        if (y > MAX_YEAR) y = 0;
        d = (int)strtol(argv[2], &err, 10);
        if (err && *err) d = 0;
        if (d < 1) d = 0;
        if (d > 25) d = 0;
        if (argc >= 4) {
            sprintf(dataname, "%.98s", argv[3]);
        } else {
            sprintf(dataname, ".%04d%02d.txt", y, d);
        }
    }
    if ((y == 0) || (d == 0)) {
        fprintf(stderr, "syntax: %s yyyy dd [input-file]\n", argv[0]);
        fprintf(stderr, "    where 2015 <= yyyy <= %d\n", MAX_YEAR);
        fprintf(stderr, "    and 1 <= dd <= 25\n");
        fprintf(stderr, "if no [input-file] is supplied loads the file .yyyydd.txt\n");
        exit(EXIT_FAILURE);
    }
    // read data from dataname into input
    char *input = NULL;
    size_t ilen = slurp(&input, dataname);

    // call the right function
    void (*p)(char *, size_t) = NULL;
    switch (y * 100 + d) {
        default: fprintf(stderr, "no function for year %d and day %d\n", y, d);
                 exit(EXIT_FAILURE);
        #if 0
        case 201501: p = aoc201501; break;
        case 201502: p = aoc201502; break;
        case 201503: p = aoc201503; break;
        case 201504: p = aoc201504; break;
        case 201505: p = aoc201505; break;
        case 201506: p = aoc201506; break;
        case 201507: p = aoc201507; break;
        case 201508: p = aoc201508; break;
        case 201509: p = aoc201509; break;
        case 201510: p = aoc201510; break;
        case 201511: p = aoc201511; break;
        case 201512: p = aoc201512; break;
        case 201513: p = aoc201513; break;
        case 201514: p = aoc201514; break;
        case 201515: p = aoc201515; break;
        case 201516: p = aoc201516; break;
        case 201517: p = aoc201517; break;
        case 201518: p = aoc201518; break;
        case 201519: p = aoc201519; break;
        case 201520: p = aoc201520; break;
        case 201521: p = aoc201521; break;
        case 201522: p = aoc201522; break;
        case 201523: p = aoc201523; break;
        case 201524: p = aoc201524; break;
        case 201525: p = aoc201525; break;
        #endif

        case 202401: p = aoc202401; break;
        case 202402: p = aoc202402; break;
    }
    p(input, ilen);
    free(input);
}