#include <gtk/gtk.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <execinfo.h>
#include <unistd.h>
#include "gui.h"
#include "reporter.h"

// Signal handler for SIGSEGV and SIGABRT
void crash_handler(int sig) {
    fprintf(stderr, "Error: Signal %d received.\n", sig);
    
    // In a real scenario, we might want to fork/exec a separate process here
    // to ensure a clean state for the GUI. For this demo, we'll try to
    // invoke the reporter directly, but be aware this is not async-signal-safe.
    
    // Get stack trace immediately
    char *trace = get_stack_trace();
    fprintf(stderr, "Stack trace:\n%s\n", trace);

    // Show the crash report window
    // Note: gtk_main() might be running, so we need to be careful.
    // We'll attempt to run a new loop or just show the dialog if possible.
    // Ideally, we launch a new process:
    // execl("./bug_reporter", "bug_reporter", "--report", trace, NULL);
    
    // For simplicity in this single-process demo:
    char cwd[1024];
    if (getcwd(cwd, sizeof(cwd)) != NULL) {
        show_crash_report_window(trace, cwd);
    } else {
        perror("getcwd");
        show_crash_report_window(trace, NULL); // Pass NULL if cwd cannot be determined
    }
    
    free(trace);
    exit(1);
}

void setup_signal_handlers() {
    struct sigaction sa;
    sa.sa_handler = crash_handler;
    sigemptyset(&sa.sa_mask);
    sa.sa_flags = SA_RESETHAND; // Reset to default after handling once to avoid loops

    sigaction(SIGSEGV, &sa, NULL);
    sigaction(SIGABRT, &sa, NULL);
}

void on_crash_me_clicked(GtkWidget *widget, gpointer data) {
    (void)widget;
    (void)data;
    printf("Crashing application...\n");
    int *p = NULL;
    *p = 42; // Dereference NULL
}

int main(int argc, char *argv[]) {
    gtk_init(&argc, &argv);

    setup_signal_handlers();

    GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window), "Bug Reporter Demo");
    gtk_window_set_default_size(GTK_WINDOW(window), 300, 200);
    g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);

    GtkWidget *button = gtk_button_new_with_label("Crash Me!");
    g_signal_connect(button, "clicked", G_CALLBACK(on_crash_me_clicked), NULL);
    
    GtkWidget *box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 10);
    gtk_container_set_border_width(GTK_CONTAINER(box), 20);
    gtk_box_pack_start(GTK_BOX(box), button, TRUE, TRUE, 0);
    gtk_container_add(GTK_CONTAINER(window), box);

    gtk_widget_show_all(window);

    gtk_main();

    return 0;
}