#include "lib/pngtile.h"
#include "shared/log.h"

#include <getopt.h>
#include <stdio.h>
#include <stdbool.h>

/**
 * Command-line options
 */
static const struct option options[] = {
    { "help",       false,  NULL,   'h' },
    { "quiet",      false,  NULL,   'q' },
    { "verbose",    false,  NULL,   'v' },
    { "debug",      false,  NULL,   'D' },
    { 0,            0,      0,      0   }
};

/**
 * Print usage/help info on stderr
 */
void help (const char *argv0)
{
    fprintf(stderr, "Usage: %s [options] <image> [...]\n", argv0);
    fprintf(stderr,
        "XXX: Process some image files.\n"
        "\n"
        "\t-h, --help           show this help and exit\n"
        "\t-q, --quiet          supress informational output\n"
        "\t-v, --verbose        display more informational output\n"
        "\t-D, --debug          equivalent to -v\n"
    );
}

int main (int argc, char **argv)
{
    int opt;
    
    // parse arguments
    while ((opt = getopt_long(argc, argv, "hqvD", options, NULL)) != -1) {
        switch (opt) {
            case 'h':
                // display help
                help(argv[0]);
                
                return EXIT_SUCCESS;

            case 'q':
                // supress excess log output
                set_log_level(LOG_WARN);

                break;

            case 'v':
            case 'D':
                // display additional output
                set_log_level(LOG_DEBUG);

                break;

            case '?':
                // useage error
                help(argv[0]);

                return EXIT_FAILURE;

            default:
                // getopt???
                FATAL("getopt_long returned unknown code %d", opt);
        }
    }
    
    // end-of-arguments?
    if (!argv[optind])
        EXIT_WARN(EXIT_FAILURE, "No images given");
    


    struct pt_ctx *ctx = NULL;
    struct pt_image *image = NULL;;

    log_debug("Processing %d images...", argc - optind);

    for (int i = optind; i < argc; i++) {
        const char *img_path = argv[i];

        log_debug("Load image from: %s", img_path);

        // open
        if (pt_image_open(&image, ctx, img_path, PT_IMG_READ | PT_IMG_WRITE)) {
            log_errno("pt_image_open: %s", img_path);

            continue;

        } else {
            log_info("Opened image at: %s", img_path);

        }
    }

    // XXX: done
    return 0;
}