/* source/widgets/sgl_label.c
 *
 * MIT License
 *
 * Copyright(c) 2023-present All contributors of SGL
 * Document reference link: https://sgl-docs.readthedocs.io
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <sgl_core.h>
#include <sgl_draw.h>
#include <sgl_math.h>
#include <sgl_log.h>
#include <sgl_mm.h>
#include <sgl_theme.h>
#include <sgl_cfgfix.h>
#include <string.h>
#include "sgl_label.h"

/**
 * @brief construct the label object
 * @param surf pointer to the surface
 * @param obj pointer to the label object
 * @param evt pointer to the event
 * @return none
 */
static void sgl_label_construct_cb(sgl_surf_t *surf, sgl_obj_t *obj, sgl_event_t *evt)
{
    sgl_label_t *label = sgl_container_of(obj, sgl_label_t, obj);
    sgl_pos_t align_pos;

    SGL_ASSERT(label->font != NULL);
    if (evt->type == SGL_EVENT_DESTROYED)
    {
        /* 释放动态文本缓冲 */
        if (label->text_buf != NULL)
        {
            sgl_free(label->text_buf);
            label->text_buf = NULL;
        }
        return;
    }
    if (evt->type == SGL_EVENT_DRAW_MAIN)
    {
        if (label->bg_flag)
        {
            sgl_draw_fill_rect(surf, &obj->area, &obj->coords, obj->radius, label->bg_color, label->alpha);
        }

        align_pos = sgl_get_text_pos(&obj->coords, label->font, label->text, 0, (sgl_align_type_t)label->align);

#if (CONFIG_SGL_LABEL_ROTATION)
        if (label->rota == 0)
        {
#endif
            sgl_draw_string(surf, &obj->area, align_pos.x + label->transform.offset.offset_x,
                            align_pos.y + label->transform.offset.offset_y,
                            label->text, label->color, label->alpha, label->font);
#if (CONFIG_SGL_LABEL_ROTATION)
        }
        else
        {
            const int16_t width = obj->area.x2 - obj->area.x1 + 1;
            const int16_t height = obj->area.y2 - obj->area.y1 + 1;
            const uint32_t buf_size = width * height;

            sgl_color_t *temp_buf = sgl_malloc(buf_size * sizeof(sgl_color_t));
            if (temp_buf == NULL)
            {
                SGL_LOG_ERROR("sgl_label_construct_cb: malloc rotation temp buffer failed");
                return;
            }

            for (uint32_t i = 0; i < buf_size; i++)
            {
                temp_buf[i] = label->bg_color;
            }

            sgl_surf_t temp_surf = {
                .x1 = 0,
                .y1 = 0,
                .x2 = width - 1,
                .y2 = height - 1,
                .buffer = temp_buf,
                .w = width,
                .h = height,
                .dirty = NULL};

            sgl_draw_string(&temp_surf, &obj->area, align_pos.x, align_pos.y,
                            label->text, label->color, label->alpha, label->font);
            sgl_draw_xform_surf(surf, &temp_surf, &obj->area, obj->coords.x1, obj->coords.y1, label->transform.rotation);

            sgl_free(temp_buf);
        }
#endif
    }
}

/**
 * @brief create a label object
 * @param parent parent of the label
 * @return pointer to the label object
 */
sgl_obj_t *sgl_label_create(sgl_obj_t *parent)
{
    sgl_label_t *label = sgl_malloc(sizeof(sgl_label_t));
    if (label == NULL)
    {
        SGL_LOG_ERROR("sgl_label_create: malloc failed");
        return NULL;
    }

    /* set object all member to zero */
    memset(label, 0, sizeof(sgl_label_t));

    sgl_obj_t *obj = &label->obj;
    sgl_obj_init(&label->obj, parent);
    obj->construct_fn = sgl_label_construct_cb;

    label->alpha = SGL_ALPHA_MAX;
    label->bg_flag = 0;
    label->text_buf = NULL;
    label->color = SGL_THEME_TEXT_COLOR;
    label->text = "";
    label->transform.rotation = 0;
    label->rota = 0;
    label->font = sgl_get_system_font();

    return obj;
}