/* test_meow_ui_view_event.c — M7.0a 缺口#7 宿主验证：meow_view 事件接线 + 递归 enter/leave。
 *
 * A 部（无 run 循环，直调 meow_view_*）：递归 enter/leave 顺序 + 运行期动态挂子视图立即进入
 *   （view.c meow_view_add_child 修正）+ 子>父 on_event 路由。
 * B 部（经 meow_ui_run 主循环）：把语义事件注入队列 → run 循环先经 meow_view_dispatch_event
 *   路由，命中的事件不再落 App on_* 回调（on_tap/on_key/on_swipe/long_press 零触发），未命中
 *   的事件照常回落 App 回调——验证「接线于 meow_ui_run、于 §6.4 分流之上」。
 *
 * 编译（宿主 gcc，链真实 gfx/sys/theme/vol/log/widget/input/activity/dialog/ime + 打桩 font/global）：
 *   gcc -Wall -Wextra -o test_meow_ui_view_event test_meow_ui_view_event.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_view_event
 */
#include "meow_ui.h"
#include "meow_ui_internal.h"   /* MEOW_EV_* */
#include "meow_ui_view.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include <assert.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)

/* ---------- A 部：递归 enter/leave 顺序 + 运行期动态挂子 ---------- */
static int g_trace[16]; static int g_trace_n = 0;
static void vtrace_enter(meow_view *v, void *ctx) { (void)ctx; g_trace[g_trace_n++] = v->id; }
static void vtrace_leave(meow_view *v, void *ctx) { (void)ctx; g_trace[g_trace_n++] = -v->id; }
static int g_child3_hits = 0;
static int vev_child3(meow_view *v, int ev, int a, int b, void *ctx)
{ (void)v;(void)ctx; if (ev == MEOW_EV_TAP && a == 33 && b == 33) { g_child3_hits++; return 1; } return 0; }

/* ---------- B 部：run 循环接线 ---------- */
static int g_tap_calls = 0, g_key_calls = 0, g_swipe_calls = 0, g_lp_calls = 0;
static void app_on_tap(int x, int y)   { (void)x;(void)y; g_tap_calls++; }
static void app_on_key(int k, int d)   { (void)k;(void)d; g_key_calls++; }
static void app_on_swipe(int dir, int dx, int dy) { (void)dir;(void)dx;(void)dy; g_swipe_calls++; }
static void app_lp(int x, int y)       { (void)x;(void)y; g_lp_calls++; }

/* 父 view：消费 TAP@(10,10) 与 LONG_PRESS（任何）。 */
static int vev_parent(meow_view *v, int ev, int a, int b, void *ctx)
{ (void)v;(void)ctx;
  if (ev == MEOW_EV_TAP && a == 10 && b == 10) return 1;
  if (ev == MEOW_EV_LONG_PRESS) return 1;
  return 0; }
/* 子 view：消费 KEY（任何）与 SWIPE_LEFT。 */
static int vev_child(meow_view *v, int ev, int a, int b, void *ctx)
{ (void)v;(void)b;(void)ctx;
  if (ev == MEOW_EV_KEY) return 1;
  if (ev == MEOW_EV_SWIPE && a == MEOW_SWIPE_LEFT) return 1;
  return 0; }

static void *driver(void *arg)
{
    (void)arg;
    usleep(700000);                                    /* 等 startup cooldown(500ms) 过后再发 */
    meow_input_inject(MEOW_EV_KEY,        MEOW_KEY_VOLUMEUP, 1);   /* child 消费 → app_on_key 不触发 */
    usleep(80000);
    meow_input_inject(MEOW_EV_TAP,        10, 10);               /* parent 消费 → app_on_tap 不触发 */
    usleep(80000);
    meow_input_inject(MEOW_EV_TAP,        50, 50);               /* 无 view 命中 → 回落 app_on_tap */
    usleep(80000);
    meow_input_inject(MEOW_EV_SWIPE,      MEOW_SWIPE_LEFT, 80);  /* child 消费 → app_on_swipe 不触发 */
    usleep(80000);
    meow_input_inject(MEOW_EV_SWIPE,      MEOW_SWIPE_RIGHT, 80); /* 无 view 命中 → 回落 app_on_swipe */
    usleep(80000);
    meow_input_inject(MEOW_EV_LONG_PRESS, 10, 10);               /* parent 消费 → long_press 不触发 */
    usleep(80000);
    meow_ui_request_exit();
    return NULL;
}

int main(void)
{
    setenv("MEOW_UI_DUMP", "/tmp/view_event.ppm", 1);
    meow_ui_opts o = { 480, 720 };
    assert(meow_ui_init(&o) == 0);

    /* ================= A 部：递归 enter/leave + 动态挂子 ================= */
    printf("A: recursive enter/leave + runtime child add\n");
    {
        static const meow_view_hooks ph = { .on_enter = vtrace_enter, .on_leave = vtrace_leave,
                                            .on_event = vev_parent };
        static const meow_view_hooks ch = { .on_enter = vtrace_enter, .on_leave = vtrace_leave,
                                            .on_event = vev_child };
        static const meow_view_hooks c3 = { .on_enter = vtrace_enter, .on_leave = vtrace_leave,
                                            .on_event = vev_child3 };
        meow_view *pv = meow_view_create(1, MEOW_VIEW_ACTIVITY, &ph, NULL);
        meow_view *cv = meow_view_create(2, MEOW_VIEW_CONTAINER, &ch, NULL);
        assert(meow_view_add_child(pv, cv) == 0);
        g_trace_n = 0;
        meow_view_page_push(1);                    /* pv.enter → cv.enter */
        CHECK(g_trace_n == 2 && g_trace[0] == 1 && g_trace[1] == 2, "push: parent.enter -> child.enter");
        /* 运行期动态挂第三个子视图（父已 ENTERED）→ 立即进入（view.c 修正） */
        meow_view *c3v = meow_view_create(3, MEOW_VIEW_CONTAINER, &c3, NULL);
        g_trace_n = 0;
        assert(meow_view_add_child(pv, c3v) == 0);
        CHECK(g_trace_n == 1 && g_trace[0] == 3, "runtime add-child-while-entered -> child.enter fires");
        /* 新挂子 view 参与事件路由：命中 (33,33) 被子 3 消费 */
        g_child3_hits = 0;
        CHECK(meow_view_dispatch_event(MEOW_EV_TAP, 33, 33) == 1 && g_child3_hits == 1,
              "runtime-added child participates in dispatch");
        /* 离开：子视图（挂载序 2 → 3）先后离开 → 父（递归离开，子->父） */
        g_trace_n = 0;
        meow_view_page_pop();
        CHECK(g_trace_n == 3 && g_trace[0] == -2 && g_trace[1] == -3 && g_trace[2] == -1,
              "pop: child2.leave -> child3.leave -> parent.leave");
        meow_view_free(pv);                        /* 递归释放 2/3 */
        printf("  PASS A: recursive order + dynamic child\n");
    }

    /* ================= B 部：meow_ui_run 接线（§6.4 之上） ================= */
    printf("B: meow_view_dispatch_event wired into meow_ui_run\n");
    {
        static const meow_view_hooks ph = { .on_event = vev_parent };
        static const meow_view_hooks ch = { .on_event = vev_child };
        meow_view *pv = meow_view_create(20, MEOW_VIEW_ACTIVITY, &ph, NULL);
        meow_view *cv = meow_view_create(21, MEOW_VIEW_CONTAINER, &ch, NULL);
        assert(meow_view_add_child(pv, cv) == 0);
        meow_view_page_push(20);                   /* 进入父+子（g_top_view=20） */

        g_tap_calls = g_key_calls = g_swipe_calls = g_lp_calls = 0;
        meow_ui_set_long_press_cb(app_lp);
        meow_ui_events ev; memset(&ev, 0, sizeof ev);
        ev.on_tap = app_on_tap; ev.on_key = app_on_key; ev.on_swipe = app_on_swipe;

        pthread_t thd; pthread_create(&thd, NULL, driver, NULL);
        meow_ui_run(&ev);                          /* 阻塞直到 driver 里 request_exit */
        pthread_join(thd, NULL);

        CHECK(g_key_calls == 0,   "KEY consumed by child -> app_on_key NOT called");
        CHECK(g_tap_calls == 1,   "TAP(10,10) consumed by parent; TAP(50,50) fell through -> exactly 1 on_tap");
        CHECK(g_swipe_calls == 1, "SWIPE_LEFT consumed by child; SWIPE_RIGHT fell through -> exactly 1 on_swipe");
        CHECK(g_lp_calls == 0,    "LONG_PRESS consumed by parent -> long_press cb NOT called");
        printf("  PASS B: run loop routes through views, fallback preserved\n");

        meow_view_page_pop();
        meow_view_free(pv);
    }

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