#include "shell/panel/footer_input.h"
#include "shell/panel/panel_state.h"
#include "core/view/view_mode_model.h"
#include "shell/actions/bank_actions.h"
#include "shell/persist/session.h"      // ReaSamplerSession — view/tail reads + mutation

#define REAPERAPI_MINIMAL
#define REAPERAPI_WANT_EnumProjects
#define REAPERAPI_WANT_MarkProjectDirty
#define REAPERAPI_WANT_Main_OnCommand
#include "reaper_plugin_functions.h"

namespace reasampler::panel {

    namespace {
        // Commits the current tail setting to ext state and marks the active project dirty so the
        // change travels inside the .rpp on Ctrl+S — closes the gap where toggle/scroll would dirty
        // the project but never write the new value. No-ops cleanly on an unsaved project.
        void markTailDirty()
        {
            if (g_panel.session) g_panel.session->saveToActiveProject();
            ReaProject* proj = EnumProjects(-1, nullptr, 0);
            if (proj) MarkProjectDirty(proj);
        }

        // click was confirmed on the toggle button;
        // detect which mode segment was hit (if any)
        bool clickToggle(int x, int y, ui::FooterBarRect toggleRect)
        {
            const int seg = hitTestSegment(x, y, toggleRect, modeCount());
            if (seg >= 0) {
                const ViewModeModel& view = g_panel.session->view();
                const std::vector<Mode>& modes = view.modes().all();

                if (seg < static_cast<int>(modes.size())) {
                    const std::string& id = modes[static_cast<std::size_t>(seg)].id;
                    const bool isActive = id == view.activeModeId();
                    const int cmd = modeActivateCommandId(id);
                    if (modeSegmentEnabled(isActive, g_panel.modeSwitchBlocked, cmd != 0)) {
                        if (cmd != 0 && Main_OnCommand) Main_OnCommand(cmd, 0);
                    }
                }
                return true;
            }
            return false;
        }

        // click was confirmed on the Tail button
        void clickTail()
        {
            TailSetting& tail = g_panel.session->tail();
            tail.mode = cycleTailMode(tail.mode);
            markTailDirty();
            invalidatePanel();
        }

        void clickSecondPass()
        {
            TailSetting& tail = g_panel.session->tail();
            tail.secondPass = capture::toggleSecondPass(tail.secondPass);
            markTailDirty();
            invalidatePanel();
        }

        // click was confirmed on the prune button
        void clickPrune()
        {
            // Fires through its registered command id (not the session directly) so the panel
            // affordance and the bindable action share the one guarded dry-run/confirm/delete
            // path in doBankPruneFolder.
            const int cmd = bankPruneCommandId();
            if (cmd != 0) Main_OnCommand(cmd, 0);
        }
    }



    // Returns: true if the click was inside the footer bar,
    //          false if the click was outside the footer bar.
    bool handleFooterClick(int x, int y, int w, int h)
    {

        const ButtonRect pb = pruneButtonRectFor(w, h);
        if (hitTestPruneButton(x, y, pb)) {
            clickPrune();
            return true;
        }

        const FooterBarLayout fb = footerBarLayoutFor(w, h);
        if (g_panel.session) {
            FooterHit clicked = hitTestFooterBar(x, y, fb);

            // The short-circuit cases
            if (clicked == FooterHit::Outside) { return false; }
            if (clicked == FooterHit::Invalid) { return true; }

            // Check actual clickable elements:

            // Cycles None -> Auto -> Manual -> None
            if (clicked == FooterHit::Tail) { clickTail(); }

            // Detect which segment was selected and activate that mode
            if (clicked == FooterHit::Toggle) { clickToggle(x, y, fb.toggle); }

            // Toggle 2nd Pass Render
            if (clicked == FooterHit::SecondPass) { clickSecondPass(); }

            return true;
        }

        // If we reach this point, no valid click target inside the footer was hit.
        return false;
    }

    bool handleFooterWheel(int x, int y, int delta) {
        if (!g_panel.session) return false;

        TailSetting& tail = g_panel.session->tail();
        if (tail.mode != TailMode::Manual) return false;  // fine-adjust is Manual-only

        // One notch is WHEEL_DELTA (120); accumulate whole notches so a high-res trackpad
        // that sends fractional deltas still steps predictably. Sign carries direction.
        const int notches = delta / 120;
        if (notches == 0) return false;  // sub-notch movement — nothing to apply yet

        const double before = tail.manualMs;
        tail.manualMs = adjustManualMs(tail.manualMs, notches, kManualStepMs);
        if (tail.manualMs == before) return true;  // already at a bound — consumed, no change

        markTailDirty();
        invalidatePanel();  // label shows the new length live
        return true;
    }
}