/*
 * 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"

/* 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. 依据紧凑节点表按层级生成 lv_menu 页面与返回栈
 *           2. 将菜单对象加入默认输入组，支持远端按键导航
 *           3. 叶子节点挂占位页，等待后续逐项填充具体功能
 */
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);

    uint32_t n = sizeof(g_menu_tab) / sizeof(g_menu_tab[0]);
    lv_obj_t *root_page = NULL;
    lv_obj_t *parent_stack[4] = {NULL, NULL, NULL, NULL};

    for (uint32_t i = 0; i < n; i++) {
        uint8_t L = g_menu_tab[i].level;
        const char *name = g_menu_tab[i].name;

        if (i == 0) {
            /* 第 0 节点为根（主界面） */
            root_page = lv_menu_page_create(menu, name);
            parent_stack[0] = root_page;
            continue;
        }

        /* 当前节点页面 */
        lv_obj_t *page = lv_menu_page_create(menu, name);

        /* 叶子：页内挂占位内容 */
        int leaf = (i + 1 >= n) || (g_menu_tab[i + 1].level <= L);
        if (leaf) {
            lv_obj_t *ph = lv_menu_cont_create(page);
            lv_obj_t *pl = lv_label_create(ph);
            lv_label_set_text(pl, "功能未实现（占位）");
        }

        /* 挂到父页：level0 直挂根，其余挂到上一级页面 */
        lv_obj_t *parent = (L == 0) ? root_page : parent_stack[L - 1];

        /* 在父页创建一个容器项，点击加载当前页 */
        lv_obj_t *item = lv_menu_cont_create(parent);
        lv_obj_t *lbl = lv_label_create(item);
        lv_label_set_text(lbl, name);
        lv_menu_set_load_page_event(menu, item, page);

        parent_stack[L] = page;
    }

    lv_menu_set_page(menu, root_page);
    return 0;
}