/* test_meow_ui_box.c — §12.1 meow_box 线性布局引擎宿主验证：
 * 布局求解矩阵（固定/weight/wrap/嵌套/对齐）、margin/padding/gap、交叉轴对齐、view 集成。
 * 纯逻辑（只创控件 + arrange + 断言矩形），不依赖 /dev/fb0/字库；不绘制。
 *
 * 编译（宿主 gcc，链真实 widget/draw/activity/theme/gfx + 打桩 font/global）：
 *   gcc -o test_meow_ui_box test_meow_ui_box.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_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_box
 */
#include "meow_ui.h"
#include "meow_ui_internal.h"   /* meow_widget_rect：真实几何断言 */
#include "meow_ui_view.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

static int g_pass = 0, g_fail = 0;
#define CHECK(cond, ...) do { \
    if (cond) { g_pass++; } \
    else { g_fail++; printf("FAIL %s:%d  ", __FILE__, __LINE__); printf(__VA_ARGS__); printf("\n"); } \
} while (0)

static void wr(meow_widget *w, int out[4]) { meow_widget_rect(w, out); }
static void boxr(meow_box *b, int out[4]) { meow_box_rect(b, out); }

/* 创建固定尺寸按钮（既有无绝对定位；注册到绘制物注册表即可） */
static meow_widget *mk(int w, int h)
{
    meow_widget *b = meow_btn_create(0, 0, w, h, "X");
    return b;
}

/* ---- 竖直列：固定 + padding + gap + CROSS_START ---- */
static void test_col_fixed(void)
{
    meow_box *bx = meow_box_new(MEOW_BOX_V);
    CHECK(bx != NULL, "box_new V");
    meow_box_set_rect(bx, 0, 0, 480, 720);
    meow_box_set_padding(bx, 20, 20, 20, 20);
    meow_box_set_gap(bx, 10);
    meow_box_set_align(bx, MEOW_BOX_ALIGN_START, MEOW_BOX_CROSS_START);
    meow_widget *a = mk(100, 50), *b = mk(120, 50), *c = mk(80, 50);
    CHECK(meow_box_add(bx, a, MEOW_BOX_FIXED, 0) == 0, "add a");
    CHECK(meow_box_add(bx, b, MEOW_BOX_FIXED, 0) == 0, "add b");
    CHECK(meow_box_add(bx, c, MEOW_BOX_FIXED, 0) == 0, "add c");
    CHECK(meow_box_count(bx) == 3, "count");
    meow_box_arrange(bx);
    int r[4];
    wr(a, r); CHECK(r[0] == 20 && r[1] == 20 && r[2] == 100 && r[3] == 50, "A x=20 y=20 w100 h50 got %d,%d,%d,%d", r[0], r[1], r[2], r[3]);
    wr(b, r); CHECK(r[0] == 20 && r[1] == 80 && r[2] == 120, "B y=80 got %d,%d,%d,%d", r[0], r[1], r[2], r[3]);
    wr(c, r); CHECK(r[0] == 20 && r[1] == 140 && r[2] == 80, "C y=140 got %d,%d,%d,%d", r[0], r[1], r[2], r[3]);
    meow_box_free(bx);
}

/* ---- 横向行：END 对齐 + 交叉轴中心 ---- */
static void test_row_end_center(void)
{
    meow_box *bx = meow_box_new(MEOW_BOX_H);
    meow_box_set_rect(bx, 10, 0, 480, 200);
    meow_box_set_padding(bx, 10, 10, 10, 10);
    meow_box_set_gap(bx, 5);
    meow_box_set_align(bx, MEOW_BOX_ALIGN_END, MEOW_BOX_CROSS_CENTER);
    meow_widget *a = mk(100, 50), *b = mk(100, 50), *c = mk(100, 50);
    CHECK(meow_box_add(bx, a, MEOW_BOX_FIXED, 0) == 0, "add");
    CHECK(meow_box_add(bx, b, MEOW_BOX_FIXED, 0) == 0, "addb");
    CHECK(meow_box_add(bx, c, MEOW_BOX_FIXED, 0) == 0, "addc");
    meow_box_arrange(bx);
    /* 内容区 x∈[20,470] cw=460；foot=100*3+5*2=310；leftover=150；END → off0=150 */
    int r[4];
    wr(a, r);
    CHECK(r[0] == 20 + 150, "END first x=170 got %d", r[0]);
    /* 交叉轴中心：cy=10（pad_t）；cross_size=ch=180，cross_base=50 → pad=130 → cross=65 → y=10+65=75 */
    CHECK(r[1] == 75 && r[3] == 50, "center y=75 got %d,%d", r[1], r[3]);
    wr(b, r); CHECK(r[0] == 20 + 150 + 100 + 5, "END second x=%d", r[0]);
    wr(c, r); CHECK(r[0] == 380, "END third x=380 got %d", r[0]);   /* 170+100+5+100+5+? = 380 */
    meow_box_free(bx);
}

/* ---- weight 均分：竖直，两个 weight 1:3 ---- */
static void test_weight(void)
{
    meow_box *bx = meow_box_new(MEOW_BOX_H);
    meow_box_set_rect(bx, 0, 0, 480, 200);
    /* 内容区 480 宽（无 pad/gap）。child 固定 80 + 两个权重 1:3 */
    meow_widget *fixed = mk(80, 200), *w1 = mk(0, 200), *w2 = mk(0, 200);
    CHECK(meow_box_add(bx, fixed, MEOW_BOX_FIXED, 0) == 0, "fixed");
    CHECK(meow_box_add(bx, w1, MEOW_BOX_WEIGHT, 1) == 0, "w1");
    CHECK(meow_box_add(bx, w2, MEOW_BOX_WEIGHT, 3) == 0, "w2");
    meow_box_arrange(bx);
    /* leftover = 480 - 80 = 400；w1=100, w2=300 */
    int r[4];
    wr(fixed, r); CHECK(r[0] == 0 && r[2] == 80, "fixed x=0 w80 got %d,%d", r[0], r[2]);
    wr(w1, r);    CHECK(r[0] == 80 && r[2] == 100, "w1 x=80 w100 got %d,%d", r[0], r[2]);
    wr(w2, r);    CHECK(r[0] == 180 && r[2] == 300, "w2 x=180 w300 got %d,%d", r[0], r[2]);
    meow_box_free(bx);
}

/* ---- WRAP 内容测量（measure 回调给 min/preferred） ---- */
static void wrap_measure(void *ctx, int *mn, int *pf) { (void)ctx; *mn = 40; *pf = 120; }
static void test_wrap(void)
{
    meow_box *bx = meow_box_new(MEOW_BOX_H);
    meow_box_set_rect(bx, 0, 0, 480, 100);
    meow_box_set_gap(bx, 10);
    meow_box_set_align(bx, MEOW_BOX_ALIGN_START, MEOW_BOX_CROSS_START);
    meow_widget *w = mk(5, 40);   /* 尺寸无关，wrap 用 measure */
    CHECK(meow_box_add_ex(bx, w, MEOW_BOX_WRAP, 0, 40, 120, wrap_measure, NULL) == 0, "wrap-add");
    meow_box_arrange(bx);
    int r[4]; wr(w, r);
    /* wrap 主轴向 preferred=120；cross_start 交叉=40（widget h 落 V=40？这是 H box，交叉=h） */
    CHECK(r[2] == 120, "wrap pref w=120 got %d", r[2]);
    meow_box_free(bx);
}

/* ---- 嵌套：Row 内嵌 Column ---- */
static void test_nested(void)
{
    meow_box *row = meow_box_new(MEOW_BOX_H);
    meow_box *col = meow_box_new(MEOW_BOX_V);
    meow_box_set_rect(row, 0, 0, 480, 200);
    meow_box_set_rect(col, 0, 0, 200, 200);
    meow_box_set_gap(row, 10);
    meow_widget *a = mk(100, 50), *b = mk(100, 50), *c = mk(100, 50);
    meow_box_add(row, a, MEOW_BOX_FIXED, 0);
    meow_box_add_sub(row, col, MEOW_BOX_FIXED, 0);
    CHECK(meow_box_add_sub(row, col, MEOW_BOX_FIXED, 0) < 0, "sub dedupe");
    meow_box_add(col, b, MEOW_BOX_FIXED, 0);
    meow_box_add(col, c, MEOW_BOX_FIXED, 0);
    meow_box_arrange(row);
    int r[4];
    wr(a, r);        CHECK(r[0] == 0 && r[2] == 100, "row a x0 w100 got %d,%d", r[0], r[2]);
    int cr[4]; boxr(col, cr); CHECK(cr[0] == 110 && cr[1] == 0 && cr[2] == 200, "sub box x=110 got %d", cr[0]);
    /* col 内 b,c 纵向：y 0,50（col y=0, gap0, cross_start） */
    meow_widget_rect(b, r); CHECK(r[0] == 110 && r[1] == 0, "col b y0 got %d", r[1]);
    meow_widget_rect(c, r); CHECK(r[1] == 50, "col c y50 got %d", r[1]);
    meow_box_free(row); meow_box_free(col);
}

/* ---- margin（widget opts）+ 交叉轴 STRETCH ---- */
static void test_margin_stretch(void)
{
    meow_box *bx = meow_box_new(MEOW_BOX_V);
    meow_box_set_rect(bx, 0, 0, 480, 300);
    meow_box_set_align(bx, MEOW_BOX_ALIGN_START, MEOW_BOX_CROSS_STRETCH);
    meow_widget *a = mk(100, 60);
    meow_widget_opts o; memset(&o, 0, sizeof o);
    o.margin_x = 30; o.margin_y = 10;
    CHECK(meow_widget_set_opts(a, &o) == 0, "set opts");
    meow_box_add(bx, a, MEOW_BOX_FIXED, 0);
    meow_box_arrange(bx);
    int r[4]; wr(a, r);
    /* V：交叉轴=x，STRETCH → w = cw - 2*margin_x = 480 - 60 = 420；x = margin_x = 30。
     * 主轴 y：lead=margin_y=10 → y=10；ext=h=60。 */
    CHECK(r[0] == 30 && r[2] == 420, "stretch w=420 x=30 got %d,%d", r[0], r[2]);
    CHECK(r[1] == 10 && r[3] == 60, "y=10 h=60 got %d,%d", r[1], r[3]);
    meow_box_free(bx);
}

/* ---- SPACE_BETWEEN ---- */
static void test_space_between(void)
{
    meow_box *bx = meow_box_new(MEOW_BOX_H);
    meow_box_set_rect(bx, 0, 0, 500, 100);
    meow_box_set_align(bx, MEOW_BOX_ALIGN_SPACE_BETWEEN, MEOW_BOX_CROSS_START);
    meow_widget *a = mk(100, 50), *b = mk(100, 50), *c = mk(100, 50);
    meow_box_add(bx, a, MEOW_BOX_FIXED, 0);
    meow_box_add(bx, b, MEOW_BOX_FIXED, 0);
    meow_box_add(bx, c, MEOW_BOX_FIXED, 0);
    meow_box_arrange(bx);
    /* cw=500；foot=300；leftover=200；n-1=2 → 每 gap += 100 → A.x=0 B.x=200 C.x=400 */
    int r[4];
    wr(a, r); CHECK(r[0] == 0, "sb A x0 got %d", r[0]);
    wr(b, r); CHECK(r[0] == 200, "sb B x200 got %d", r[0]);
    wr(c, r); CHECK(r[0] == 400, "sb C x400 got %d", r[0]);
    meow_box_free(bx);
}

/* ---- view 集成：meow_view_set_layout + relayout ---- */
static void test_view_layout(void)
{
    meow_view *v = meow_view_create(900, MEOW_VIEW_ACTIVITY, NULL, NULL);
    CHECK(v != NULL, "view create");
    v->x = 0; v->y = 0; v->w = 480; v->h = 720;
    meow_box *bx = meow_box_new(MEOW_BOX_V);
    meow_box_set_gap(bx, 8);
    meow_box_set_align(bx, MEOW_BOX_ALIGN_START, MEOW_BOX_CROSS_START);
    meow_widget *a = mk(300, 50), *b = mk(300, 50);
    meow_box_add(bx, a, MEOW_BOX_FIXED, 0);
    meow_box_add(bx, b, MEOW_BOX_FIXED, 0);
    meow_view_add_widget(v, a);
    meow_view_add_widget(v, b);
    meow_view_set_layout(v, bx);   /* relayout 立即排一次 */
    int r[4];
    wr(a, r); CHECK(r[0] == 0 && r[1] == 0 && r[2] == 300, "view a x0 y0 w300 got %d,%d,%d", r[0], r[1], r[2]);
    wr(b, r); CHECK(r[1] == 58, "view b y=58 got %d", r[1]);   /* 0 + 50 + gap8 */
    meow_view_free(v);
    meow_box_free(bx);
}

/* ---- 越界去重 / 池满 ---- */
static void test_edge(void)
{
    meow_box *bx = meow_box_new(MEOW_BOX_H);
    meow_widget *a = mk(10, 10), *dup = mk(10, 10);
    CHECK(meow_box_add(bx, dup, MEOW_BOX_FIXED, 0) == 0, "add dup");
    CHECK(meow_box_add(bx, dup, MEOW_BOX_FIXED, 0) < 0, "dedupe");
    CHECK(meow_box_add(bx, NULL, MEOW_BOX_FIXED, 0) < 0, "null add rejected");
    meow_box_widget_at(bx, 0) ? 0 : 0;
    CHECK(meow_box_widget_at(bx, 0) == dup, "widget_at 0");
    CHECK(meow_box_sub_at(bx, 0) == NULL, "sub_at null");
    meow_box_free(bx);
}

int main(void)
{
    test_col_fixed();
    test_row_end_center();
    test_weight();
    test_wrap();
    test_nested();
    test_margin_stretch();
    test_space_between();
    test_view_layout();
    test_edge();
    printf("box: %d pass / %d fail\n", g_pass, g_fail);
    return g_fail ? 1 : 0;
}