/* test_meow_ui_dispatch.c — §6.4 事件分发形式化宿主验证（离屏 480x720，16bpp）。
 *
 * 覆盖（新穿透矩阵，全部直接驱动 SDK §6.4 仲裁者 API + 真实注册控件）：
 *   M1  模态打开点下层不触发：modal_begin 后 meow_ui_hit_topdown 恒返回模态哨兵（不再落到下层
 *       同坐标控件），gesture_begin 捕获的是模态（哨兵）而非下层按钮——下层绝不消费；
 *   M2  弹层叠开两层不叠黑/层隔离：modal_begin 两次 → depth=2；end（LIFO）逐层递减；期间
 *       hit_topdown 始终返回哨兵，下层收不到任何触摸；
 *   M3  捕获手势滑出不误触：gesture_begin 命中按钮 A 后捕获；任凭概念滑动到远处（不重新命中），
 *       meow_ui_gesture_owner 恒为 A（绝不滑出误触下层/邻控件）；end 释放；
 *   M4  list 焦点点外释放：meow_list_tap_at/meow_listview_tap_at 使列表成为唯一焦点；
 *       focus_tap 落在列表内 → 保位；落在列表外（页面内容/空白）→ 释放焦点并触发 lost 回调。
 *
 * 编译（宿主 gcc，链真实 widget/draw/input/activity/gfx/sys/theme/vol/log/dialog/ime/notify/ipc +
 *      打桩 font/global；完整超集便于链接）：
 *   gcc -Wall -Wextra -o test_meow_ui_dispatch test_meow_ui_dispatch.c test_host_stub.c \
 *       meow_ui_gfx.c meow_ui_sys.c meow_ui_theme.c meow_ui_vol.c meow_ui_log.c \
 *       meow_ui_widget.c meow_ui_input.c meow_ui_activity.c meow_ui_dialog.c meow_ui_ime.c meow_ui_str.c \
 *       meow_pinyin.c meow_ui_draw.c meow_ui_view.c meow_ui_box.c meow_ui_anim.c meow_ui_scroll.c \
 *       meow_ui_img.c meow_ui_media.c meow_notify_ipc.c stb_image.c \
 *       -I. -I../meow_launcherd -DMEOW_UI_HOST_TEST -pthread -lm
 * 运行：./test_meow_ui_dispatch   （无设备，纯宿主）
 */
#include "meow_ui.h"
#include "meow_ui_internal.h"
#include "meow_ui_view.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

static int g_fail = 0;
#define CHECK(cond, name) do { \
    if (cond) { printf("  PASS %s\n", name); } \
    else { printf("  FAIL %s\n", name); g_fail++; } } while (0)

/* 焦点丢失回调计数 */
static int g_lost_calls = 0;
static void *g_lost_last = NULL;
static void focus_lost(void *owner, void *ctx)
{ (void)ctx; g_lost_calls++; g_lost_last = owner; }

/* 列表数据源（最小 W_LIST） */
static int list_src(int idx, char *label, int len, void *ctx)
{
    (void)ctx;
    if (idx < 0 || idx >= 8) return 0;
    snprintf(label, (size_t)len, "item %d", idx);
    return 1;
}

int main(void)
{
    setenv("MEOW_UI_DUMP", "/tmp/dispatch.ppm", 1);
    meow_ui_opts o = { 480, 720 };
    if (meow_ui_init(&o) != 0) { printf("init failed\n"); return 1; }
    meow_ui_activity_push(5);      /* 页面控件 owner=5，命中/绘制对齐 */

    /* 场景控件：两个不重叠按钮 A/B + 一个 LazyColumn 列表 */
    meow_widget *btnA = meow_btn_create(20, 100, 200, 60, "A");
    meow_widget *btnB = meow_btn_create(240, 100, 200, 60, "B");
    meow_widget *list = meow_lazycolumn_create(20, 300, 400, 150, 44, 8, list_src, NULL);

    /* ================= M1：模态打开点下层不触发 =================
     * 无模态：hit_topdown(按钮A中心) == 按钮A；modal_begin 后同一落点返回模态哨兵（≠按钮A），
     * gesture_begin 捕获的是模态而非下层按钮——下层绝不消费（穿透根治）。 */
    printf("M1 modal open -> lower not triggered\n");
    void *h0 = meow_ui_hit_topdown(120, 130);
    printf("  no-modal   hit_topdown(120,130) = %s\n",
           h0 == (void *)btnA ? "btnA" : (h0 ? "other" : "NULL"));
    CHECK(h0 == (void *)btnA, "no-modal topdown hits btnA (z-top)");

    meow_ui_modal *m = meow_ui_modal_begin();
    void *hm = meow_ui_hit_topdown(120, 130);
    printf("  modal-open hit_topdown(120,130) = %s (sentinel=%d)\n",
           hm == (void *)btnA ? "btnA(LEAK!)" : "modal-sentinel", hm != NULL && hm != (void *)btnA);
    CHECK(meow_ui_modal_active(), "modal active");
    CHECK(hm != NULL && hm != (void *)btnA, "modal present -> hit_topdown never reaches btnA");
    void *g0 = meow_ui_gesture_begin(120, 130);        /* 下层同坐标：捕获的是模态而非按钮 */
    CHECK(g0 == hm, "gesture_begin during modal captures modal (sentinel), not btnA");
    meow_ui_gesture_end();
    meow_ui_modal_end(m);
    CHECK(meow_ui_hit_topdown(120, 130) == (void *)btnA, "after modal_end topdown returns btnA again");
    CHECK(!meow_ui_modal_active(), "modal released");

    /* ================= M2：弹层叠开两层（层隔离，depth 语义） =================
     * 两层弹开：depth 1→2；期间 hit_topdown 恒返回哨兵；LIFO 关内层→1，关外层→0。
     * 叠黑由 Dialog/Sheet 的「打开前整帧快照 + 关闭还原 + 高亮仅重绘卡片不叠遮罩」保证
     * （meow_ui_dialog.c，M2.71-bug3），本处验证层隔离 + 栈深。 */
    printf("M2 stacked modals (two layers)\n");
    meow_ui_modal *m1 = meow_ui_modal_begin();
    meow_ui_modal *m2 = meow_ui_modal_begin();
    CHECK(meow_ui_modal_depth() == 2, "two modals -> depth 2");
    CHECK(meow_ui_hit_topdown(120, 130) != (void *)btnA, "either modal -> lower btnA blocked");
    meow_ui_modal_end(m2);
    CHECK(meow_ui_modal_depth() == 1, "close inner -> depth 1");
    CHECK(meow_ui_hit_topdown(120, 130) != (void *)btnA, "outer modal still blocks lower");
    meow_ui_modal_end(m1);
    CHECK(meow_ui_modal_depth() == 0, "close outer -> depth 0");
    CHECK(meow_ui_hit_topdown(120, 130) == (void *)btnA, "both closed -> lower reachable");

    /* ================= M3：捕获手势滑出不误触 =================
     * touch-down 命中按钮 A → 捕获。此后 move（即使滑到按钮 B / 空白）不重新命中，owner 恒为 A；
     * 绝不滑出误触 B 或下层。抬手（gesture_end）释放。 */
    printf("M3 gesture capture: slide-out no false-trigger\n");
    void *g1 = meow_ui_gesture_begin(120, 130);
    CHECK(g1 == (void *)btnA, "down on A captures A");
    CHECK(meow_ui_gesture_owner() == (void *)btnA, "owner == A after down");
    /* 概念滑动到按钮 B 中心 (340,130)：捕获不重命中 → 仍是 A（不误触 B） */
    CHECK(meow_ui_gesture_owner() == (void *)btnA, "slide to B point: owner stays A (no re-hit)");
    /* 滑出到空白 */ 
    CHECK(meow_ui_gesture_owner() == (void *)btnA, "slide to blank: owner stays A");
    meow_ui_gesture_end();
    CHECK(meow_ui_gesture_owner() == NULL, "release -> no owner");

    /* ================= M4：list 焦点点外释放 =================
     * meow_list_tap_at 使列表成为唯一焦点；focus_tap 落在列表内→保位；落在列表外→释放并通知。 */
    printf("M4 list focus release on tap outside\n");
    meow_ui_focus_set_lost_cb(focus_lost, NULL);
    CHECK(meow_ui_focus_owner() == NULL, "no focus initially");
    int idx = meow_list_tap_at(list, 120, 320);   /* 命中列表行0 */
    CHECK(idx >= 0, "list tap hits a row");
    CHECK(meow_ui_focus_owner() == (void *)list, "list tap -> list becomes focus owner");
    meow_ui_focus_tap(120, 320);                  /* 点列表内：保位 */
    CHECK(meow_ui_focus_owner() == (void *)list, "tap inside list -> focus retained");
    CHECK(g_lost_calls == 0, "no lost callback while focus retained");
    meow_ui_focus_tap(120, 130);                  /* 命中按钮A（非列表）：释放焦点+通知 */
    CHECK(meow_ui_focus_owner() == NULL, "tap outside list (on A) -> focus released");
    CHECK(g_lost_calls == 1 && g_lost_last == (void *)list, "lost callback fired with list owner");
    /* 再次聚焦后再点「空白」（无控件命中）：同样释放 */
    meow_list_tap_at(list, 120, 320);
    meow_ui_focus_tap(400, 650);                  /* 列表外空白 */
    CHECK(meow_ui_focus_owner() == NULL, "tap on blank -> focus released");
    CHECK(g_lost_calls == 2, "lost callback fired again");
    (void)btnB;

    /* 清理：控件释放自动注销 z 序绘制物 + 焦点/捕获复位 */
    meow_widget_free(list);
    meow_widget_free(btnB);
    meow_widget_free(btnA);
    meow_ui_focus_release(NULL);
    meow_ui_activity_pop();
    meow_ui_shutdown();

    printf(g_fail ? "\nRESULT: %d FAIL(S)\n" : "\nRESULT: ALL PASS\n", g_fail);
    return g_fail;
}