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

#include <cammy/sram.h>

#include "commands.h"

void cammy_command_usage(int argc, char **argv, const char *message, ...) {
    if (message) {
        va_list args;

        va_start(args, message);
        vfprintf(stderr, message, args);
        va_end(args);
         fprintf(stderr, "\n");
    }

    fprintf(stderr, "usage: %1$s import       file.sav 1..30 input.png\n"
                    "       %1$s export       file.sav 1..30 output.png\n"
                    "       %1$s dither       input.png output.png\n"
                    "       %1$s split-rgb    file.sav rn gn bn input.png\n"
                    "       %1$s merge-rgb    file.sav rn gn bn output.png\n"
                    "       %1$s import-tile  file.sav 1..30 printer.tile\n"
                    "       %1$s export-tile  file.sav 1..30 output.tile\n"
                    "       %1$s convert-tile printer.tile output.png\n"
                    "       %1$s slice        x-pad y-pad input.png\n",
        argv[0]);

    exit(1);
}

void cammy_command_validate_photo_number(int argc, char **argv, int num) {
    if (num < 1 || num > CAMMY_SRAM_PHOTO_COUNT) {
        cammy_command_usage(argc, argv, "Invalid photo number");
    }
}

static struct {
    char *name;
    int (*fun)(int, char **);
} commands[] = {
    { "import",       cammy_command_import       },
    { "export",       cammy_command_export       },
    { "dither",       cammy_command_dither       },
    { "split-rgb",    cammy_command_split_rgb    },
    { "merge-rgb",    cammy_command_merge_rgb    },
    { "import-tile",  cammy_command_import_tile  },
    { "export-tile",  cammy_command_export_tile  },
    { "convert-tile", cammy_command_convert_tile },
    { "slice",        cammy_command_slice        },
    { NULL,           NULL                       }
};

int main(int argc, char **argv) {
    int i;

    if (argc < 2) {
        cammy_command_usage(argc, argv, "No command specified");
    }

    for (i=0; commands[i].name; i++) {
        if (strcmp(argv[1], commands[i].name) == 0) {
            return commands[i].fun(argc, argv);
        }
    }

    cammy_command_usage(argc, argv, "Unknown command '%s'", argv[1]);

    return 0;
}