/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * Copyright 2025 Mike Becker. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <ui/ui.h>

#define VAR_TILE_WIDTH "tile_width"
#define VAR_TILE_HEIGHT "tile_height"
#define VAR_SPACING "spacing"

static void *create_document(void) {
    void *doc = ui_document_new(1); // TODO: actually we have zero additional data, but that probably does not work
    UiContext *ctx = ui_document_context(doc);
    ui_set(ui_int_new(ctx, VAR_TILE_WIDTH), 32);
    ui_set(ui_int_new(ctx, VAR_TILE_HEIGHT), 32);
    ui_set(ui_int_new(ctx, VAR_SPACING), 0);
    return doc;
}

static void draw_atlas(UiEvent* evt, UiGraphics* g, void* data) {
    UiContext *doc_ctx = ui_document_context(evt->document);
    int spacing = (int) ui_var_get_int(doc_ctx, VAR_SPACING);
    int tile_width = (int) ui_var_get_int(doc_ctx, VAR_TILE_WIDTH);
    int tile_height = (int) ui_var_get_int(doc_ctx, VAR_TILE_HEIGHT);

    ui_graphics_color(g, 255, 128, 0);
    ui_draw_rect(g, 0, 0, g->width, g->height, true);
    ui_graphics_color(g, 128, 128, 128);
    for (int x = spacing ; x < g->width ; x += tile_width + spacing) {
        for (int y = spacing ; y < g->height ; y += tile_height + spacing) {
            ui_draw_rect(g, x, y, tile_width, tile_height, false);
        }
    }
}

static void application_startup([[maybe_unused]] UiEvent *event, void *data) {
    UiObject *window = ui_window("Ascension - Texture Atlas Editor");

    ui_grid(window, .columnspacing = 10, .margin = 10, .fill = true) {
        ui_frame(window, .hexpand = true, .hfill = true, .vexpand = true, .vfill = true,
                 .subcontainer = UI_CONTAINER_NO_SUB) {
            ui_drawingarea(window, .draw = draw_atlas);
        }
        ui_vbox(window, .spacing = 5) {
            ui_grid(window, .columnspacing = 10, .def_hexpand = true, .def_hfill = true) {
                ui_button(window, .label = "Load Atlas");
                ui_button(window, .label = "Save Atlas");
            }
            ui_button(window, .label = "Load Texture");
            ui_separator(window);
            ui_grid(window, .columnspacing = 10, .rowspacing = 2, .def_vfill = true) {
                ui_label(window, .label = "Tile Width:");
                ui_spinbox(window, .varname = VAR_TILE_WIDTH, .min = 8, .step = 8);
                ui_label(window, .label = "Tile Height:");
                ui_spinbox(window, .varname = VAR_TILE_HEIGHT, .min = 8, .step = 8);
                ui_newline(window);
                ui_label(window, .varname = VAR_SPACING, .label = "Spacing:");
                ui_spinbox(window);
            }
        }
    }

    ui_attach_document(window->ctx, create_document());

    ui_show(window);
}

int main(int argc, char** argv) {
    ui_init("asc_atlas_editor", argc, argv);
    ui_onstartup(application_startup, NULL);
    ui_main();
    return 0;
}