/* test_meow_ui_ft.c — SDK 矢量字（meow_ft_*，§10.1）宿主单测。
 * 覆盖任务要求的五项：加载 / 渲染像素非空 / 宽度测量 / LRU 淘汰 / 降级回退。
 *
 * 编译（宿主 gcc，链真实 gfx/sys/theme/vol/log/notify_ipc + 打桩 font/global + meow_ui_ft + 宿主 freetype）：
 *   gcc -o test_meow_ui_ft test_meow_ui_ft.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_notify_ipc.c \
 *       meow_ui_ft.c \
 *       -I. -Iinclude -I../meow_launcherd -DMEOW_UI_HOST_TEST -pthread vendor/freetype-build-host/libfreetype.a
 * 用法：./test_meow_ui_ft [font.otf]   （缺省用仓库 font/src/MiSans-Regular.otf）
 */
#include "meow_ui.h"
#include "meow_ui_internal.h"   /* meow_ft_glyph（LRU 淘汰测试直接用底层光栅化） */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

static int fails = 0;
#define CHECK(c, m) do { if (c) printf("  ok  %s\n", m); else { printf("FAIL  %s\n", m); fails++; } } while (0)

/* 统计 back_buf 中 != bg 的像素数（RGB565 host 16bpp）。 */
static int count_changed(unsigned char *fb, int pitch, int bg565)
{
    int n = 0;
    for (int y = 0; y < 720; y++) {
        uint16_t *row = (uint16_t *)(fb + (size_t)y * (size_t)pitch);
        for (int x = 0; x < 480; x++) if (row[x] != (uint16_t)bg565) n++;
    }
    return n;
}

int main(int argc, char **argv)
{
    const char *font = (argc > 1) ? argv[1] : "/home/Aska/Project/R3ProII/font/src/MiSans-Regular.otf";
    meow_ui_opts o = { 480, 720 };
    CHECK(meow_ui_init(&o) == 0, "meow_ui_init(480x720)");
    int pitch = meow_ui_back_buf_pitch();
    CHECK(pitch == 480 * 2, "back_buf pitch=960");
    CHECK(meow_ui_back_buf_bpp() == 16, "bpp=16");
    unsigned char *fb = meow_ui_back_buf();
    CHECK(fb != NULL, "back_buf non-null");

    /* ---- 1) 加载 ---- */
    CHECK(!meow_ft_loaded(), "no font loaded initially");
    CHECK(meow_ft_load("nonexistent-font.otf") != 0, "load(bad path) fails");
    CHECK(!meow_ft_loaded(), "bad load leaves unloaded");
    CHECK(meow_ft_load(font) == 0, "meow_ft_load(MiSans)");
    CHECK(meow_ft_loaded(), "meow_ft_loaded after load");
    CHECK(meow_ft_cache_slots() == 512, "default LRU slots=512");

    /* ---- 2) 渲染像素非空（矢量） ---- */
    meow_ui_clear(0xFFFFFF);            /* 白底 */
    int r = meow_ft_text(10, 50, "你好A", 20, 0x000000);
    CHECK(r == 0, "meow_ft_text(vec) returns 0");
    int vec_dark = count_changed(fb, pitch, 0xFFFF);
    printf("  vec dark=%d\n", vec_dark);
    CHECK(vec_dark > 50, "vector render produced non-empty pixels");

    /* ---- 3) 宽度测量 ---- */
    int w20 = meow_ft_width("你好A", 20);
    int w10 = meow_ft_width("你好A", 10);
    printf("  width(你好A,20)=%d width(...,10)=%d\n", w20, w10);
    CHECK(w20 > 0, "vec width(20)>0");
    CHECK(w20 > w10, "larger px -> larger width");
    CHECK(meow_ft_width("", 20) == 0, "empty string width=0");
    CHECK(meow_ft_width("你", 20) > 0, "CJK width>0");
    /* 单 CJK 字 width ≈ 字号（MiSans CJK 满宽 advance） */
    CHECK(meow_ft_width("你", 20) >= 17 && meow_ft_width("你", 20) <= 23, "CJK adv ~20");

    /* ---- 4) LRU 淘汰 ---- */
    int got = meow_ft_cache_set_slots(256);
    CHECK(got == 256, "set LRU slots=256");
    CHECK(meow_ft_cache_slots() == 256, "LRU slots now 256");
    for (int i = 0; i < 300; i++) {
        int adv = 0, bw = 0, bh = 0, left = 0, top = 0;
        const uint8_t *bmp = NULL;
        meow_ft_glyph(20, 0x4E00u + (uint32_t)i, &adv, &bmp, &bw, &bh, &left, &top);
    }
    int used = meow_ft_cache_used();
    printf("  lru used=%d slots=256\n", used);
    CHECK(used <= 256, "lru used <= 256 after 300 requests");
    CHECK(used >= 1, "lru used >= 1");
    meow_ft_cache_set_slots(512);   /* 还原默认，供后续 */

    /* ---- 5) 降级回退（无矢量字体 → 位图字库/5x7，不出豆腐） ---- */
    meow_ft_unload();
    CHECK(!meow_ft_loaded(), "after unload not loaded");
    meow_ui_clear(0xFFFFFF);
    r = meow_ft_text(10, 50, "X", 20, 0x000000);
    CHECK(r == -1, "meow_ft_text degrades (returns -1)");
    int deg_dark = count_changed(fb, pitch, 0xFFFF);
    printf("  degrade dark=%d\n", deg_dark);
    CHECK(deg_dark > 0, "degrade still draws (5x7/bitmap, no tofu crash)");
    /* 降级宽度 = 位图字库宽度（宿主无位图库 → 5x7 兜底：len*6*scale(20=2)） */
    CHECK(meow_ft_width("X", 20) == 12, "degrade width via bitmap (5x7) = 12");

    meow_ui_shutdown();
    printf("test_meow_ui_ft: %s\n", fails ? "FAIL" : "PASS");
    return fails ? 1 : 0;
}