/* ui/demo/sdk2/sdk2.c — 控件库 Demo 页内「SDK 批次2 新控件」CONTAINER 子视图（agent-363）。
 *
 * 目标（SDK_VIEW_FRAMEWORK_DESIGN.md §B.4/§E③，同 list.c）：把 demo 页底部的三个 SDK 批次2
 * 新控件演示区块抽成一个 meow_view CONTAINER 子视图，挂到 demo ACTIVITY view 的 children：
 *   ① meow_select      （§5.8.9 枚举/预设选择器：下拉模态 + 单选列表 + on_change 回调）
 *   ② meow_lazygrid    （§12.4 2 维虚拟化宫格：非 meow_widget，on_draw 直绘 meow_lazygrid_draw）
 *   ③ meow_listview 左滑删除（§5.5 swipe-delete：swipe_begin/move/end + on_delete + 回弹/删除动画）
 *
 * 职责边界（诚实，与 list.c 同折中）：
 *   - 本子视图承接三节**整体**：章节标题 + select 按钮 + 宫格 + swipe-列表 的创建/释放与视图态
 *     （grid 虚拟源/选中/滚动、swipe 行集/滚动、select 选中值）。控件**创建**在 demo_build_at 链路内
 *     （sdk2_build_at，owner=ACT_DEMO）、**释放**在 sdk2_release（demo_free_content 调）——与 list.c
 *     相同折中：完整「控件归容器拥有」需 SDK 侧支持（本批冻结 patch_v2/sdk/）。
 *   - meow_lazygrid 是**非 meow_widget**：不注册 z 序/绘制注册表。本子视图 on_draw 直接调
 *     meow_lazygrid_draw（view → 注册表 → invalidate 链路，与 list 区块标题同法）。
 *   - 章节标题（三段）与 select 当前值文本也走 on_draw 直绘（列表区标题同法），不逐标题注册
 *     CUSTOM 绘制物；on_draw 是回调、view 不缓存像素（非保留，§5.8.7）。
 *   - 嵌套生命周期由 SDK view_enter/view_leave 递归驱动（随 demo 页进出，同 list.c）；绘制经
 *     meow_draw_view_entered（含祖先已进入判定）在 meow_ui_paint_full/invalidate 触发。
 *
 * 事件接线（demo 页把 touch/tap/swipe 分发改派到本子视图，实现「子>父」命中）：
 *   - tap   → sdk2_hit    （select 按钮 / 宫格 tap / 列表行 tap / 行左滑松手 swipe_end）
 *   - down  → sdk2_down   （宫格聚焦拖拽 / 列表行左滑 begin）
 *   - move  → sdk2_move   （宫格滚动 / 列表左滑 move 或列表竖向滚动）
 *   - swipe → sdk2_swipe  （宫格/列表聚焦时滚自身；否则回退页面滚动）
 */
#include "hello_internal.h"
#include <stdio.h>
#include <string.h>
#include <stdint.h>

/* ---- 本子视图（CONTAINER，非页面：id 用越界值避免占用 g_view_by_id 顶层页槽位）---- */
static meow_view *g_sdk2_view = NULL;

/* ---- demo 内容布局常量（与 demo.c 一致）：内容区 x16 宽 448 ---- */
#define S2_X    16
#define S2_W    448
#define S2_DCW  212
#define S2_DBH  44
#define S2_CH   52

/* 三节（章节标题几何在 sdk2_build_at 计算后存入，on_draw 直绘用；屏幕坐标）。 */
static int s2_t1_y, s2_t2_y, s2_t3_y;          /* 三节标题 y（on_draw 直绘） */

/* ============================================================ */
/* ① meow_select — 枚举/预设选择器                                 */
/* ============================================================ */
static meow_widget *g_btn_sel = NULL;    /* 「打开选择器」按钮（sdk2_release 释放） */
static meow_select *g_sel = NULL;        /* 选择器实例（sdk2_view_create 建一次，destroy 释放） */
static rect_t       r_selbtn = { 0, 0, 0, 0 };
static rect_t       r_selval = { 0, 0, 0, 0 };  /* 当前选择值文本区（on_draw 直绘） */
static int          g_sel_cur = 0;       /* 当前选中项（跨重建保留；on_change 更新） */

static const char *g_sel_items[] = {     /* 枚举演示：音频档位（对齐 M7.2 设置页采样率/码率） */
    "Auto", "44.1kHz", "48kHz", "96kHz", "192kHz",
};
#define SEL_N ((int)(sizeof g_sel_items / sizeof g_sel_items[0]))

/* on_change 回调（meow_select_open 确认后触发：更新选中下标 + 重画值文本区）。 */
static void sdk2_sel_change(int idx, void *ctx)
{
    (void)ctx;
    if (idx >= 0 && idx < SEL_N) g_sel_cur = idx;
    if (r_selval.w > 0) meow_ui_invalidate(r_selval.x, r_selval.y, r_selval.w, r_selval.h);
}

/* 打开选择器（阻塞到确认/取消；on_change 已更新选中值）。 */
static void sdk2_select_open(void)
{
    if (!g_sel) return;
    int r = meow_select_open(g_sel);
    meow_log(MEOW_LOG_INFO, "sdk2 select return=%d (%s)",
             r, (r >= 0 && r < SEL_N) ? g_sel_items[r] : "cancel");
}

/* ============================================================ */
/* ② meow_lazygrid — 2 维虚拟化宫格（非 widget）                    */
/* ============================================================ */
static meow_lazygrid *g_grid = NULL;
static rect_t          r_grid = { 0, 0, 0, 0 };
static int             g_grid_scroll = 0;   /* 跨重建保留：宫格滚动偏移 */
static int             g_grid_sel = -1;     /* 跨重建保留：选中项 */
static int             g_drag_grid = 0;     /* 触摸拖宫格（down 置位；move 滚动） */
static int             g_grid_focus = 0;    /* 1=宫格聚焦（swipe 滚宫格而非页面） */
static int             g_grid_last_y = 0;

#define GRID_N     36           /* 总项数（count > 视口行数 → 可滚动） */
#define GRID_COLS  3
#define GRID_CW    138
#define GRID_CH    86
#define GRID_GAP   10
#define GRID_H     190

/* 虚拟源：count 总项数（实时查）；bind 项进入视口时调一次（同 listview 池语义）。 */
static int grid_count(void *ctx) { (void)ctx; return GRID_N; }
static void grid_bind(int idx, meow_lazygrid_item *item, void *ctx)
{
    (void)ctx;
    static char t[24], s[24];
    snprintf(t, sizeof t, "App %d", idx);
    snprintf(s, sizeof s, "v1.%d", idx);
    memset(item, 0, sizeof *item);
    item->title = t; item->subtitle = s;
    item->enabled = (idx % 9 != 8);           /* 演示禁用变淡（每 9 个禁用 1 个） */
}

/* 完全自绘 cell（set_item_draw）：icon+label 风格，对齐主界面用途。 */
static void grid_cell(int idx, int x, int y, int w, int h, int st, void *ctx)
{
    (void)ctx;
    const meow_theme *th = meow_theme_get();
    int sel = st & MEOW_LAZYGRID_ST_SELECTED;
    int dis = st & MEOW_LAZYGRID_ST_DISABLED;
    uint32_t bg   = sel ? th->primaryContainer : th->surfaceContainerLow;
    uint32_t icon = dis ? th->onSurfaceVariant : th->primary;
    uint32_t txt  = sel ? th->onPrimaryContainer
                        : (dis ? th->onSurfaceVariant : th->onSurface);
    meow_ui_fill_rect(x, y, w, h, bg);              /* 格底卡片 */
    /* icon 块（无图资源：主题 primary 方块代替主界面图标位） */
    int isz = w / 3; if (isz > h / 2) isz = h / 2;
    meow_ui_fill_rect(x + (w - isz) / 2, y + 10, isz, isz, icon);
    /* 名 + 状态（底部两行，中心对齐） */
    static char t[24], s[24];
    snprintf(t, sizeof t, "App %d", idx);
    snprintf(s, sizeof s, "v1.%d", idx);
    int thh = meow_ui_text_height(th->font_body);
    meow_ui_text_center(x + w / 2, y + h - thh - 22, t, th->font_body, txt);
    meow_ui_text_center(x + w / 2, y + h - thh - 3,  s, th->font_body, txt);
    if (sel) meow_ui_draw_rect_round(x, y, w, h, th->radius_card, th->primary);
    if (dis) meow_ui_fill_rect_alpha(x, y, w, h, th->onSurface, 90);
}

/* 宫格 tap：置选中 + 局部刷 + 日志。 */
static void grid_tap(int idx, void *ctx)
{
    (void)ctx;
    g_grid_sel = idx;
    meow_log(MEOW_LOG_INFO, "sdk2 grid tap idx=%d", idx);
    if (r_grid.w > 0) meow_ui_invalidate(r_grid.x, r_grid.y, r_grid.w, r_grid.h);
}

/* ============================================================ */
/* ③ meow_listview 行左滑删除（swipe-delete）                      */
/* ============================================================ */
#define LV_MAX 9
static meow_widget *g_lv = NULL;      /* W_LISTVIEW（注册表自动画：行 + 右露删除区） */
static rect_t       r_lv = { 0, 0, 0, 0 };
static int          g_lv_deleted[LV_MAX];   /* 1=已删除（行移除；count 实时收缩） */
static char         g_lv_label[LV_MAX][24]; /* 行标题（bind 填充） */
static int          g_lv_scroll = 0;        /* 跨重建保留：列表滚动 */
static int          g_lv_focus = 0;         /* 1=swipe-list 聚焦（swipe 滚列表而非页面） */
static int          g_lv_swipe = 0;         /* 行左滑在途（swipe_begin 命中；hit 里 swipe_end） */
static int          g_drag_lv = 0;          /* 触摸拖列表（竖向滚动）；d. 左滑时同置位 */
static int          g_lv_last_y = 0;
#define LV_H 190

static int lv_count_remaining(void)
{
    int n = 0;
    for (int i = 0; i < LV_MAX; i++) if (!g_lv_deleted[i]) n++;
    return n;
}
static int lv_count(void *ctx) { (void)ctx; return lv_count_remaining(); }

/* 显示下标（0..count-1）→ 源行 id（跳过已删除行）。删除后行前移，身份按源行稳定。 */
static int lv_real_index(int display)
{
    if (display < 0) return -1;
    int c = 0;
    for (int i = 0; i < LV_MAX; i++) {
        if (g_lv_deleted[i]) continue;
        if (c == display) return i;
        c++;
    }
    return -1;
}

static void lv_bind(int idx, meow_lv_item *item, void *ctx)
{
    (void)ctx;
    int real = lv_real_index(idx);
    static char s[24];
    memset(item, 0, sizeof *item);
    snprintf(s, sizeof s, "swipe left");
    item->title = (real >= 0) ? g_lv_label[real] : "";
    item->subtitle = s;
    item->icon_kind = (real >= 0 && real % 3 == 0) ? MEOW_LIST_ICON_FOLDER : MEOW_LIST_ICON_NONE;
    item->right = MEOW_LIST_RIGHT_NONE;
    item->enabled = 1;
}
/* on_delete（swipe 删除动画滑出完成回调）：删除该显示下标对应的源行 + 局部刷。
 * 注：swipe_end 传的是显示下标（含删除前定位的 swipe_idx）；映射回源行 id 标记。 */
static void lv_delete(int idx, void *ctx)
{
    (void)ctx;
    int real = lv_real_index(idx);
    if (real >= 0) g_lv_deleted[real] = 1;
    meow_log(MEOW_LOG_INFO, "sdk2 swipe delete display=%d real=%d", idx, real);
    if (g_lv && r_lv.w > 0) meow_ui_invalidate(r_lv.x, r_lv.y, r_lv.w, r_lv.h);
}

/* 建三节时填充行标题（demo_init 一次性；跨重建保留）。 */
static void sdk2_init_rows(void)
{
    for (int i = 0; i < LV_MAX; i++) {
        snprintf(g_lv_label[i], sizeof g_lv_label[i], "notif %d", i);
        g_lv_deleted[i] = 0;
    }
}

static int s2_built = 0;   /* 1=本子视图内容已建（on_draw / 事件分发判空） */

/* ============================================================ */
/* 释放 / 建三节                                                 */
/* ============================================================ */

/* 内容释放（demo_free_content 调）：清引用（本子视图建的控件在 sdk2_release 释放）。 */
void sdk2_release(void)
{
    if (g_grid) { meow_lazygrid_free(g_grid); g_grid = NULL; }
    if (g_btn_sel) { meow_widget_free(g_btn_sel); g_btn_sel = NULL; }
    if (g_lv)      { meow_widget_free(g_lv);      g_lv = NULL; }
    r_selbtn = r_selval = r_grid = r_lv = RX(0, 0, 0, 0);
    g_drag_grid = 0; g_grid_focus = 0; g_grid_last_y = 0;
    g_lv_focus = 0; g_lv_swipe = 0; g_drag_lv = 0; g_lv_last_y = 0;
    s2_built = 0;
    if (g_sdk2_view) g_sdk2_view->x = g_sdk2_view->y = g_sdk2_view->w = g_sdk2_view->h = 0;
}

/* 内容重建后建三节（demo_build_at 调）。入参：yb_base=base 空间 y；ct/scroll 同 demo.c
 * （SY(base)=ct+base-scroll）。返回下一 base y。 */
int sdk2_build_at(int yb_base, int ct, int scroll)
{
#define SY2(b) (ct + (b) - scroll)
    int yb = yb_base;

    /* ---- ① SELECT ---- */
    s2_t1_y = SY2(yb);
    yb += 26;
    r_selbtn = RX(S2_X, SY2(yb), S2_DCW, S2_DBH);
    g_btn_sel = meow_btn_create_variant(r_selbtn.x, r_selbtn.y, r_selbtn.w, r_selbtn.h,
                                        "CHOOSE", MEOW_BTN_OUTLINED);
    r_selval = RX(S2_X + S2_DCW + 14, SY2(yb) + 10, S2_W - S2_DCW - 14, 24);
    yb += S2_CH;

    /* ---- ② LAZYGRID ---- */
    s2_t2_y = SY2(yb);
    yb += 30;
    r_grid = RX(S2_X, SY2(yb), S2_W, GRID_H);
    g_grid = meow_lazygrid_create(r_grid.x, r_grid.y, r_grid.w, r_grid.h,
                                  GRID_COLS, GRID_CW, GRID_CH, GRID_GAP);
    if (g_grid) {
        meow_lazygrid_set_vsource(g_grid, grid_count, grid_bind, NULL);
        meow_lazygrid_set_item_draw(g_grid, grid_cell, NULL);
        meow_lazygrid_set_empty_text(g_grid, "No apps");
        meow_lazygrid_set_on_tap(g_grid, grid_tap, NULL);
        meow_lazygrid_set_scroll(g_grid, g_grid_scroll);
        meow_lazygrid_set_sel(g_grid, g_grid_sel);
    }
    yb += GRID_H + 30;

    /* ---- ③ SWIPE-DELETE ---- */
    s2_t3_y = SY2(yb);
    yb += 26;
    r_lv = RX(S2_X, SY2(yb), S2_W, LV_H);
    g_lv = meow_listview_create(r_lv.x, r_lv.y, r_lv.w, r_lv.h, 0,
                                NULL, NULL, MEOW_LIST_SEL_NONE);
    if (g_lv) {
        meow_listview_set_item_h(g_lv, 48);
        meow_listview_set_vsource(g_lv, lv_count, lv_bind, NULL);
        meow_listview_set_item_renderer(g_lv, 2, 1, 0);   /* 双行、左图标、无右尾件 */
        meow_listview_set_empty_text(g_lv, "All rows deleted");
        meow_listview_set_swipe_delete(g_lv, 1, lv_delete, NULL);
        meow_listview_set_scroll(g_lv, g_lv_scroll);
    }
    yb += LV_H + 10;

    if (g_sdk2_view) {
        g_sdk2_view->x = S2_X; g_sdk2_view->y = s2_t1_y;
        g_sdk2_view->w = S2_W; g_sdk2_view->h = (r_lv.y + r_lv.h) - s2_t1_y;
    }
    s2_built = 1;
    return yb;
#undef SY2
}

/* ---- on_draw：三节标题 + select 当前值 + 宫格（非保留，invalidate 触发重画）---- */
static void sdk2_draw_on(meow_view *v, const meow_theme *th, void *ctx)
{
    (void)v; (void)th; (void)ctx;
    if (!s2_built) return;
    const meow_theme *t = meow_theme_get();
    meow_ui_text(S2_X, s2_t1_y, "SELECT (enum/preset)", 20, t->primary);
    meow_ui_text(S2_X, s2_t2_y, "LAZYGRID (2D virtualized)", 20, t->primary);
    meow_ui_text(S2_X, s2_t3_y, "LISTVIEW swipe-delete", 20, t->primary);
    char buf[40];
    snprintf(buf, sizeof buf, "sel = %s", g_sel_items[g_sel_cur]);
    meow_ui_text(r_selval.x, r_selval.y, buf, 20, t->dim);
    if (g_grid) meow_lazygrid_draw(g_grid, t);
}

/* ============================================================ */
/* 事件分发（demo 页转发）                                        */
/* ============================================================ */

/* tap：select 按钮 → 打开模态；列表行左滑松手 → swipe_end；宫格 → tap_at；列表行 → tap。 */
int sdk2_hit(int x, int y)
{
    if (!s2_built) return 0;
    /* 行左滑【松手】最优先：滑动后手指可能已移出列表矩形（只判在途标志）。 */
    if (g_lv && g_lv_swipe) {
        meow_listview_set_scroll(g_lv, g_lv_scroll);
        int c = meow_listview_swipe_end(g_lv, x, y);   /* 判删/回弹；动画由 meow_anim_tick 推进 */
        g_lv_swipe = 0;
        if (c) return 1;                               /* 消费（删/回弹动画中）；未滑动=0 落行选中 */
    }
    if (g_btn_sel && meow_widget_hit(g_btn_sel, x, y)) {
        sdk2_select_open();
        meow_ui_invalidate(r_selbtn.x, r_selbtn.y, r_selbtn.w, r_selbtn.h);
        return 1;
    }
    if (g_grid && meow_lazygrid_hit(g_grid, x, y) >= 0) {
        meow_lazygrid_tap_at(g_grid, x, y);   /* 置选中 + grid_tap 回调 + 局部刷 */
        return 1;
    }
    if (g_lv && meow_listview_hit(g_lv, x, y) >= 0) {
        meow_listview_tap_at(g_lv, x, y);     /* 行点击（演示选中）+ 局部刷 */
        meow_ui_invalidate(r_lv.x, r_lv.y, r_lv.w, r_lv.h);
        return 1;
    }
    return 0;
}

/* touch_down：命中区置拖拽/聚焦。宫格>列表。返回 1=本区消费。 */
int sdk2_down(int x, int y)
{
    if (!s2_built) return 0;
    /* 新手势先复位本子视图拖拽态：demo_touch_down 只复位 list/slider/page 标志，不触及 sdk2
     * 的 g_drag_grid/g_drag_lv/g_lv_swipe（sdk2.c 内部，demo 页经 extern 看不到）；不复位则上一条
     * sdk2 拖拽残留会在本次「落页内容区」新手势的 move 里继续劫持页面拖动（sdk2_move 守卫误判）。 */
    g_drag_grid = 0; g_drag_lv = 0; g_lv_swipe = 0;
    if (g_grid && meow_lazygrid_hit(g_grid, x, y) >= 0) {
        g_drag_grid = 1; g_grid_focus = 1; g_grid_last_y = y;
        return 1;
    }
    if (g_lv && meow_listview_hit(g_lv, x, y) >= 0) {
        meow_listview_set_scroll(g_lv, g_lv_scroll);
        g_lv_swipe = meow_listview_swipe_begin(g_lv, x, y);   /* 命中可滑行 → 1 */
        g_lv_focus = 1; g_drag_lv = 1; g_lv_last_y = y;
        return 1;
    }
    return 0;
}

/* touch_move：宫格滚动 / 列表左滑 move（消费→不滚页面）或列表竖向滚动。返回 1=消费。 */
int sdk2_move(int x, int y)
{
    if (!s2_built) return 0;
    if (g_drag_grid && g_grid) {
        int dy = y - g_grid_last_y; g_grid_last_y = y;
        meow_lazygrid_scroll_by(g_grid, -dy);
        g_grid_scroll = meow_lazygrid_scroll(g_grid);
        if (r_grid.w > 0) meow_ui_invalidate(r_grid.x, r_grid.y, r_grid.w, r_grid.h);
        return 1;
    }
    /* 列表滚动须在「本次手势命中列表」才消费（g_drag_lv，由 sdk2_down 命中列表置位）。
     * 若仅因 g_lv 存在就无条件消费，会劫持 demo 页内容区拖拽（任何 move 都被这里吃掉，
     * 页面永不滚动）——与 grid（g_drag_grid 守卫）同构；359 教训同源（SDK 控件局部刷对，
     * 错在调用方控制流把页面滚动让给了控件）。 */
    if (g_drag_lv && g_lv) {
        if (g_lv_swipe) {   /* 行左滑在途：喂 move；1=横向消费；0=纵向主导→取消本行 swipe */
            meow_listview_set_scroll(g_lv, g_lv_scroll);
            if (meow_listview_swipe_move(g_lv, x, y)) return 1;
            g_lv_swipe = 0;
        }
        int dy = y - g_lv_last_y; g_lv_last_y = y;   /* 竖向滚动（跟手） */
        meow_listview_scroll_by(g_lv, -dy);
        g_lv_scroll = meow_listview_scroll(g_lv);
        if (r_lv.w > 0) meow_ui_invalidate(r_lv.x, r_lv.y, r_lv.w, r_lv.h);
        return 1;
    }
    return 0;
}

/* swipe UP/DOWN：宫格/列表聚焦时滚自身（del 已按方向加权），1=已消费。 */
int sdk2_swipe(int del)
{
    if (!s2_built) return 0;
    if (g_grid_focus && g_grid) {
        meow_lazygrid_scroll_by(g_grid, del);
        g_grid_scroll = meow_lazygrid_scroll(g_grid);
        if (r_grid.w > 0) meow_ui_invalidate(r_grid.x, r_grid.y, r_grid.w, r_grid.h);
        return 1;
    }
    if (g_lv_focus && g_lv) {
        meow_listview_scroll_by(g_lv, del);
        g_lv_scroll = meow_listview_scroll(g_lv);
        if (r_lv.w > 0) meow_ui_invalidate(r_lv.x, r_lv.y, r_lv.w, r_lv.h);
        return 1;
    }
    return 0;
}

/* 本次手势是否已被本子视图实时滚过（demo_swipe 早退用，防 on_swipe 二次滚动——同 list 的 g_drag_list）。 */
int sdk2_dragging(void)
{
    return (g_drag_grid || g_drag_lv) ? 1 : 0;
}

/* ============================================================ */
/* 子视图生命周期（on_enter/on_leave 由 SDK 递归驱动；on_destroy 清引用） */
/* ============================================================ */
static void sdk2_page_enter(meow_view *v, void *ctx)
{
    (void)v; (void)ctx;
    meow_log(MEOW_LOG_INFO, "demo sdk2 view enter");
}
static void sdk2_page_leave(meow_view *v, void *ctx)
{
    (void)v; (void)ctx;
    meow_log(MEOW_LOG_INFO, "demo sdk2 view leave");
}
static void sdk2_page_destroy(meow_view *v, void *ctx)
{
    (void)v; (void)ctx;
    if (g_sel) { meow_select_free(g_sel); g_sel = NULL; }
    s2_built = 0;
    g_sdk2_view = NULL;   /* meow_view_free 递归释放前清引用，防悬垂 */
}

meow_view *sdk2_view_create(void)
{
    static const meow_view_hooks h = {
        .on_enter   = sdk2_page_enter,
        .on_leave   = sdk2_page_leave,
        .on_destroy = sdk2_page_destroy,
        .on_draw    = sdk2_draw_on,
    };
    /* id 用非页面值：容器不占 g_view_by_id（那是 page_push/pop 顶层页查找表）。 */
    g_sdk2_view = meow_view_create(0x2000, MEOW_VIEW_CONTAINER, &h, NULL);
    /* meow_select 实例一次性创建（控制态随本子视图存活，不受内容重建影响）；行标题一次性填充。 */
    sdk2_init_rows();
    if (g_sdk2_view && !g_sel) {
        g_sel = meow_select_create("Sample rate", 0);
        if (g_sel) {
            for (int i = 0; i < SEL_N; i++) meow_select_add_item(g_sel, g_sel_items[i]);
            meow_select_set_on_change(g_sel, sdk2_sel_change, NULL);
        }
    }
    return g_sdk2_view;
}
meow_view *sdk2_view_get(void)
{
    return g_sdk2_view;
}