/*
 * Copyright (C) 2026 Linux Studio Plugins Project <https://lsp-plug.in/>
 *           (C) 2026 Vladimir Sadovnikov <sadko4u@gmail.com>
 *
 * This file is part of lsp-ws-lib
 * Created on: 7 июл. 2022 г.
 *
 * lsp-ws-lib is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * lsp-ws-lib is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with lsp-ws-lib. If not, see <https://www.gnu.org/licenses/>.
 */

#include <lsp-plug.in/ws/factory.h>
#include <lsp-plug.in/ws/IEventHandler.h>
#include <lsp-plug.in/stdlib/math.h>
#include <lsp-plug.in/test-fw/mtest.h>

MTEST_BEGIN("ws.display", clipping)

    class Handler: public ws::IEventHandler
    {
        private:
            test_type_t    *pTest;
            ws::IWindow    *pWnd;
            bool            bAntiAlias;

        public:
            inline Handler(test_type_t *test, ws::IWindow *wnd)
            {
                pTest       = test;
                pWnd        = wnd;
                bAntiAlias  = true;
            }

            virtual status_t handle_event(const ws::event_t *ev)
            {
                switch (ev->nType)
                {
                    case ws::UIE_REDRAW:
                    {
                        Color c(0.0f, 0.0f, 0.0f);
                        ws::ISurface *s = pWnd->get_surface();
                        if (s == NULL)
                            return STATUS_OK;

                        // Perform drawing
                        s->begin();
                        s->clear(c);
                        s->set_antialiasing(bAntiAlias);

                        s->clip_begin(32, 32, pWnd->width() - 64, pWnd->height() - 64);
                        c.green(0.75f);
                        s->clear(c);

                        float hw = pWnd->width()  * 0.5f;
                        float hh = pWnd->height() * 0.5f;

                        s->clip_begin(64, 64, pWnd->width() - 128, pWnd->height() - 128);

                        // Clear with blue
                        c.set_rgb24(0x0088cc);
                        s->clear(c);

                        // Draw the clipped figure
                        c.set_rgb24(0xffee00);
                        constexpr const size_t N = 40;
                        float vx[N+1], vy[N+1];

                        for (size_t i=0; i<=N; ++i)
                        {
                            float a = (M_PI * 2.0f * i) / N;
                            float r = 1.0f - (i & 1) * 0.3f;

                            vx[i]   = hw * (1.0f + r * cosf(a));
                            vy[i]   = hh * (1.0f + r * sinf(a));
                        }

                        s->fill_poly(c, vx, vy, N + 1);

                        s->clip_end();

                        // Draw the multiline
                        c.set_rgb24(0x00ccff);

                        for (size_t i=0; i<=N; ++i)
                        {
                            float a = (M_PI * 2.0f * i) / N;
                            float r = 0.9f - (i & 1) * 0.3f;

                            vx[i]   = hw * (1.0f + r * cosf(a));
                            vy[i]   = hh * (1.0f + r * sinf(a));
                        }

                        s->wire_poly(c, 5, vx, vy, N + 1);

                        // Draw polygon with fill
                        for (size_t i=0; i<=N; ++i)
                        {
                            float a     = (M_PI * 2.0f * i) / N;
                            vx[i]       = hw + (i * 4.0f - N*2.0f);
                            vy[i]       = hh + sinf(a) * N * 2.0f;
                        }

                        c.set_rgb(1.0f, 0.0f, 0.0f);
                        Color c2(c, 0.5f);

                        s->draw_poly(c2, c, 5.0f, vx, vy, N + 1);

                        s->clip_end();
                        s->end();

                        return STATUS_OK;
                    }

                    case ws::UIE_MOUSE_CLICK:
                    {
                        // Left mouse button toggles anti-aliasing
                        if (ev->nCode == ws::MCB_LEFT)
                        {
                            bAntiAlias = !bAntiAlias;
                            pTest->printf("Anti-aliasing enabled: %s\n", (bAntiAlias) ? "true" : "false");
                            pWnd->invalidate();
                        }
                        break;
                    }

                    case ws::UIE_CLOSE:
                    {
                        pWnd->hide();
                        pWnd->display()->quit_main();
                        break;
                    }

                    default:
                        return IEventHandler::handle_event(ev);
                }

                return STATUS_OK;
            }
    };

    MTEST_MAIN
    {
        ws::IDisplay *dpy = ws::create_display(0, NULL);
        MTEST_ASSERT(dpy != NULL);
        lsp_finally { ws::free_display(dpy); };

        ws::IWindow *wnd = dpy->create_window();
        MTEST_ASSERT(wnd != NULL);
        lsp_finally{
            wnd->destroy();
            delete wnd;
        };

        MTEST_ASSERT(wnd->init() == STATUS_OK);
        MTEST_ASSERT(wnd->set_caption("Test clipping") == STATUS_OK);
        MTEST_ASSERT(wnd->resize(640, 400) == STATUS_OK);
        MTEST_ASSERT(wnd->set_window_actions(ws::WA_MOVE | ws::WA_CLOSE) == STATUS_OK);
        MTEST_ASSERT(wnd->set_size_constraints(640, 400, 640, 400) == STATUS_OK);

        Handler h(this, wnd);
        wnd->set_handler(&h);

        MTEST_ASSERT(wnd->show() == STATUS_OK);

        MTEST_ASSERT(dpy->main() == STATUS_OK);
    }

MTEST_END

