#include "../../src/gui/main_window.hpp"
#include "../../src/gui/graph_widget.hpp"
#include "../../src/gui/sequencer_widget.hpp"
#include <FL/Fl.H>
#include <FL/Fl_Group.H>
#include <chrono>
#include <cstdio>
#include <cstring>

namespace {
Fl_Widget *find(Fl_Group &group, const char *label)
{
    for (int i = 0; i < group.children(); ++i) {
        Fl_Widget *child = group.child(i);
        if (child->label() != nullptr && std::strstr(child->label(), label) != nullptr) return child;
        if (auto *nested = dynamic_cast<Fl_Group *>(child)) if (auto *match = find(*nested, label)) return match;
    }
    return nullptr;
}
GraphWidget *canvas_in(Fl_Group &group)
{
    for (int i = 0; i < group.children(); ++i) {
        if (auto *canvas = dynamic_cast<GraphWidget *>(group.child(i))) return canvas;
        if (auto *nested = dynamic_cast<Fl_Group *>(group.child(i))) if (auto *canvas = canvas_in(*nested)) return canvas;
    }
    return nullptr;
}
SequencerWidget *timeline_in(Fl_Group &group)
{
    for (int i = 0; i < group.children(); ++i) {
        if (auto *s = dynamic_cast<SequencerWidget *>(group.child(i))) return s;
        if (auto *g = dynamic_cast<Fl_Group *>(group.child(i))) if (auto *s = timeline_in(*g)) return s;
    }
    return nullptr;
}
void pump()
{
    const auto end = std::chrono::steady_clock::now() + std::chrono::milliseconds(400);
    while (std::chrono::steady_clock::now() < end) Fl::wait(0.02);
}
}
#define CHECK(c) do { if (!(c)) { std::fprintf(stderr,"FAIL %s:%d: %s\n",__FILE__,__LINE__,#c); return 1; } } while (0)
int main(int argc, char **argv)
{
    // Real JACK backend and real FLTK event loop. No routes, no playback data.
    for (int iteration = 0; iteration < 3; ++iteration) {
        MainWindow window(false);
        window.show(argc, argv);
        CHECK(find(window, "ready / stopped") != nullptr);
        auto *play = find(window, "Play");
        auto *stop = find(window, "Stop");
        auto *reconnect = find(window, "Reconnect");
        CHECK(play != nullptr && stop != nullptr && reconnect != nullptr);
        auto *canvas = canvas_in(window);
        CHECK(canvas != nullptr);
        auto *timeline = timeline_in(window); CHECK(timeline != nullptr);
        CHECK(canvas->add_node(XTC_NODE_OSCILLATOR) == XTC_OK);
        CHECK(canvas->add_node(XTC_NODE_GAIN) == XTC_OK);
        CHECK(canvas->add_node(XTC_NODE_OUTPUT) == XTC_OK);
        CHECK(canvas->connect_ports({0U, 1U, 1U, 0U}) == XTC_OK);
        CHECK(canvas->connect_ports({1U, 1U, 2U, 0U}) == XTC_OK);
        for (int restart = 0; restart < 3; ++restart) {
            uint64_t previous = timeline->position();
            CHECK(play->active());
            play->do_callback();
            pump();
            CHECK(find(window, "running — modular graph") != nullptr);
            CHECK(timeline->position() > previous);
            CHECK(find(window, "Graph: active in engine") != nullptr);
            const xtc_graph *unchanged = canvas->graph();
            CHECK(canvas->connect_ports({1U, 1U, 1U, 0U}) == XTC_ERR_GRAPH_CYCLE);
            CHECK(canvas->graph() == unchanged);
            CHECK(canvas->add_node(XTC_NODE_METER) == XTC_OK);
            pump();
            CHECK(find(window, "Graph: active in engine") != nullptr);
            CHECK(canvas->delete_selected() == XTC_OK);
            pump();
            CHECK(find(window, "Graph: active in engine") != nullptr);
            auto *status = find(window, "JACK |");
            CHECK(status != nullptr);
            unsigned int rate = 0U, frames = 0U, blocks = 0U;
            CHECK(std::sscanf(status->label(), "JACK | %u Hz | %u frames | mono | %u blocks", &rate, &frames, &blocks) == 3);
            CHECK(rate > 0U && frames > 0U && blocks > 0U);
            stop->do_callback();
            CHECK(find(window, "ready / stopped") != nullptr);
            uint64_t paused = timeline->position(); pump();
            CHECK(timeline->position() == paused);
        }
        reconnect->do_callback();
        CHECK(find(window, "ready / stopped") != nullptr);
        play->do_callback();
        pump();
        CHECK(find(window, "running — modular graph") != nullptr);
        window.do_callback(); // Close with an active client; synchronizes callbacks.
        CHECK(!window.shown());
        pump(); // No timer may access the closed client.
    }
    std::puts("Live GUI/JACK graph edits/revision acknowledgements/start/stop/reconnect/active-close tests passed.");
    return 0;
}