// panel_agent_runs.cpp — wraps the registry fn_viz::render_agent_runs_timeline.
//
// HTTP polling against agent_runner_api:8486. If the API is offline the
// panel shows `disconnected` and the table stays empty — never blocks the
// UI thread (calls happen lazily via Refresh button).
#include "panels.h"
#include "core/icons_tabler.h"
#include "viz/agent_runs_timeline.h"

#include <imgui.h>
#include <mutex>

namespace kanban_cpp {

namespace {

fn_viz::TimelineState& state_singleton() {
    static fn_viz::TimelineState s;
    static bool inited = false;
    if (!inited) {
        s.sse_url = "http://127.0.0.1:8486/api/runs/stream";
        s.connection_status = "disconnected";
        inited = true;
    }
    return s;
}

void poll_runs(AppState& app) {
    auto& ts = state_singleton();
    std::string err;
    auto runs = list_runs(app.cfg, err);
    if (!err.empty()) {
        std::lock_guard<std::mutex> lk(ts.runs_mutex);
        ts.connection_status = "disconnected";
        return;
    }
    std::lock_guard<std::mutex> lk(ts.runs_mutex);
    ts.runs.clear();
    for (const auto& r : runs) {
        fn_viz::AgentRun ar;
        ar.id          = r.id;
        ar.app         = "kanban_cpp";
        ar.card_id     = r.card_id;
        ar.branch      = r.branch;
        ar.status      = r.status;
        ar.started_at  = r.started_at;
        ar.finished_at = r.finished_at;
        ts.runs.push_back(ar);
    }
    ts.connection_status = "connected";
}

} // namespace

void draw_agent_runs(AppState& app, bool* p_open) {
    if (!ImGui::Begin(TI_ROBOT " Agent runs", p_open)) {
        ImGui::End();
        return;
    }

    auto& ts = state_singleton();
    if (ImGui::Button(TI_REFRESH " Poll agent_runner_api")) poll_runs(app);
    ImGui::SameLine();
    ImGui::TextDisabled("%s", ts.connection_status.c_str());

    ImGui::Separator();
    fn_viz::render_agent_runs_timeline(ts);

    ImGui::End();
}

} // namespace kanban_cpp