/*
 * 模块名称：UI Menu (菜单页面构建)
 * 模块功能：基于 lv_menu 复现 DTU-HMI 树形菜单，支持方向键导航与返回
 * 适用平台：STM32F407ZGTx
 * 作者：王建锋
 * 创建日期：2026-08-29
 * 修改记录：
 *     2026-08-29  王建锋  创建初始版本
 */
#include "ui_menu.h"

#include "lvgl.h"

#define DBG_TAG "[UI_MENU]"
#include "dbg_log.h"

/* 菜单节点表（简化自 DTU-HMI menuTab）：层级 + 名称 */
typedef struct {
    uint8_t level;        /* 0=根页面, 1..3=子层次 */
    const char *name;
} ui_menu_node_t;

static const ui_menu_node_t g_menu_tab[] = {
    {0, "主界面"},
    {1, "装置信息"},
    {1, "实时数据"},
    {2, "交流量"},
    {2, "直流量"},
    {2, "开入量"},
    {1, "定值参数"},
    {2, "定值"},
    {3, "定值"},
    {3, "遥调"},
    {3, "零压"},
    {3, "电压"},
    {2, "查看"},
    {3, "定值"},
    {3, "遥调"},
    {3, "零压"},
    {3, "电压"},
    {1, "遥测量"},
    {2, "测量值"},
    {2, "遥调系数"},
    {2, "遥测系数"},
    {2, "双字节"},
    {2, "装置遥调"},
    {1, "装置维护"},
    {2, "时间设置"},
    {2, "强制复归"},
    {2, "手动录波"},
    {2, "自动录波"},
    {1, "通讯设置"},
    {2, "通讯参数"},
    {2, "网络配置"},
    {2, "SNTP设置"},
    {1, "记录查询"},
    {2, "SOE记录"},
    {2, "事故记录"},
    {2, "操作记录"},
    {2, "告警记录"},
    {2, "变位告警"},
    {2, "遥信记录"},
    {2, "自检记录"},
    {2, "定值记录"},
    {2, "录波记录"},
    {0, "厂家设置"},
    {1, "元件设置"},
    {1, "恢复默认"},
    {2, "全部恢复"},
    {2, "默认参数"},
    {2, "默认定值"},
    {2, "默认系数"},
    {2, "电压"},
    {2, "元件参数"},
    {1, "版本显示"},
    {1, "装置遥调"},
    {2, "测量遥调"},
    {2, "装置遥调"},
    {2, "直流遥调"},
    {2, "开出遥调"},
    {2, "装置记录"},
    {2, "告警记录"},
    {2, "遥调记录"},
    {2, "信号复归"},
    {1, "版本信息"},
};

/*
 * 函数功能：构建菜单（lv_menu 页面树），复现参考项目菜单结构
 * 入口参数：无
 * 返回值：0 - 成功，其他 - 失败（对象创建失败）
 * 限定条件：ui_port_init() 已成功调用，活动屏幕存在
 * 函数说明：1. 仅构建主页面（根页 + 一级菜单项），子树暂不构建以控制内存占用
 *           2. 文本全部使用静态字符串（不 strdup），减少 LVGL 堆分配
 *           3. 构建中监控 LVGL 池空闲内存，不足时中止而非崩溃
 */
int ui_menu_init(void)
{
    lv_obj_t *menu = lv_menu_create(lv_screen_active());
    if (menu == NULL) {
        return -1;
    }
    lv_obj_set_size(menu, 160, 160);
    lv_menu_set_mode_root_back_button(menu, LV_MENU_ROOT_BACK_BUTTON_ENABLED);
    lv_group_add_obj(lv_group_get_default(), menu);

    /* 仅构建主页面：根页 + 一级菜单项（静态文本，不建子树，省内存） */
    lv_obj_t *root_page = lv_menu_page_create(menu, NULL);
    if (root_page == NULL) {
        return -1;
    }
    lv_menu_set_page_title_static(root_page, "主界面");

    lv_mem_monitor_t mon;
    lv_mem_monitor(&mon);
    DBG_INFO("menu build start: total=%u free=%u big=%u",
             (unsigned)mon.total_size,
             (unsigned)mon.free_size, (unsigned)mon.free_biggest_size);

    uint32_t n = sizeof(g_menu_tab) / sizeof(g_menu_tab[0]);
    for (uint32_t i = 1; i < n; i++) {
        if (g_menu_tab[i].level != 1) {
            continue;   /* 只显示一级菜单项，子树暂不构建 */
        }

        /* 内存警戒：空闲池不足则中止，避免 LVGL 内部 NULL 解引用崩溃 */
        lv_mem_monitor(&mon);
        if (mon.free_biggest_size < 1024) {
            DBG_ERROR("menu mem low: abort at item %u (free=%u big=%u)",
                     (unsigned)i, (unsigned)mon.free_size,
                     (unsigned)mon.free_biggest_size);
            break;
        }

        const char *name = g_menu_tab[i].name;
        lv_obj_t *item = lv_menu_cont_create(root_page);
        lv_obj_t *lbl = lv_label_create(item);
        lv_label_set_text_static(lbl, name);
    }

    lv_menu_set_page(menu, root_page);

    lv_mem_monitor(&mon);
    DBG_INFO("menu build done: total=%u free=%u big=%u used=%u",
             (unsigned)mon.total_size,
             (unsigned)mon.free_size, (unsigned)mon.free_biggest_size,
             (unsigned)(mon.total_size - mon.free_size));
    return 0;
}