#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include "engine.h"

static Engine engine;
static volatile int keep_running = 1;

void signal_handler(int sig) {
    keep_running = 0;
}

void print_usage(const char *program) {
    printf("Usage: %s [options]\n", program);
    printf("Options:\n");
    printf("  -n <name>    JACK client name (default: jack-looper)\n");
    printf("  -c <channel> MIDI control channel (default: 0)\n");
    printf("  -h           Show this help\n");
}

int main(int argc, char *argv[]) {
    const char *client_name = "jack-looper";
    int control_channel = 0;
    int opt;
    
    while ((opt = getopt(argc, argv, "n:c:h")) != -1) {
        switch (opt) {
            case 'n':
                client_name = optarg;
                break;
            case 'c':
                control_channel = atoi(optarg);
                if (control_channel < 0 || control_channel > 15) {
                    fprintf(stderr, "Control channel must be 0-15\n");
                    return 1;
                }
                break;
            case 'h':
                print_usage(argv[0]);
                return 0;
            default:
                print_usage(argv[0]);
                return 1;
        }
    }
    
    // Initialize engine
    if (engine_init(&engine, client_name) != 0) {
        fprintf(stderr, "Failed to initialize engine\n");
        return 1;
    }
    
    engine.control_channel = control_channel;
    
    // Set up signal handler
    signal(SIGINT, signal_handler);
    signal(SIGTERM, signal_handler);
    
    // Start engine
    if (engine_start(&engine) != 0) {
        fprintf(stderr, "Failed to start engine\n");
        engine_cleanup(&engine);
        return 1;
    }
    
    printf("JACK Looper started\n");
    printf("Client name: %s\n", client_name);
    printf("Control channel: %d\n", control_channel);
    printf("Sample rate: %u Hz\n", engine.sample_rate);
    printf("Press Ctrl+C to stop\n\n");
    
    // Main loop
    while (keep_running) {
        sleep(1);
    }
    
    // Cleanup
    printf("\nShutting down...\n");
    engine_stop(&engine);
    engine_cleanup(&engine);
    
    return 0;
}