/* test_mf_logsig.c — 宿主单测：多字体「日志跃迁签名」与门控（M52 刷屏整改）。
 *
 * 背景：meow_font_reload_multifont() 被 launcher 主循环每 2s 调一次，旧实现每次无条件
 * 打 `multi_font: enabled, ...`（真机 5297/6603 行 = 80%）。整改后只在配置签名变化时打。
 * 本测试守两件事：
 *   (1) 签名对**所有**能改变行为的输入敏感（on / global / 各类别 / distinct / truncated）；
 *   (2) 输入不变时签名恒定 —— 即 60s 空转（30 次调用）只产生 1 条日志。
 *
 * 编译运行：gcc -I. -Wall -Wextra test_mf_logsig.c -o test_mf_logsig && ./test_mf_logsig
 * （不依赖 launcher 其它模块 / 不依赖设备；纯头文件逻辑）
 */
#include "mf_logsig.h"

#include <stdio.h>
#include <string.h>

#define NCLS 6

static int g_pass = 0, g_fail = 0;

static void check(const char *name, int got, int want)
{
    if (got == want) { g_pass++; printf("PASS %s\n", name); }
    else { g_fail++; printf("FAIL %s: got %d want %d\n", name, got, want); }
}

/* 真机 settings.conf 的多字体形态（2026-11-11）：
 *   display.multi_font = 1
 *   font.file = MeowOS/fonts/ztest/regular/font.png        → global = ztest
 *   font.class_num / font.class_latin = MeowOS/fonts/google_sans/regular/font.png
 *   → distinct = 2（ztest + google_sans） */
#define G_ZTEST  "/usr/data/mnt/sd_0/MeowOS/fonts/ztest/regular/font.png"
#define C_GOOGLE "/usr/data/mnt/sd_0/MeowOS/fonts/google_sans/regular/font.png"
#define C_MISANS "/usr/data/mnt/sd_0/MeowOS/fonts/misans/regular/font.png"

int main(void)
{
    /* ---- 1. 真机形态：同输入 → 同签名（1000 次不变，这就是「空转不打日志」的根基）---- */
    const char *base[NCLS] = { NULL, NULL, C_GOOGLE, C_GOOGLE, NULL, NULL };
    uint64_t s0 = mf_logsig(1, G_ZTEST, base, NCLS, 2, 0);
    int stable = 1;
    for (int i = 0; i < 1000; i++)
        if (mf_logsig(1, G_ZTEST, base, NCLS, 2, 0) != s0) stable = 0;
    check("same config -> same sig (1000x)", stable, 1);

    /* ---- 2. 每一条输入变化都必须换签名 ---- */
    check("on 1->0 changes sig", mf_logsig(0, G_ZTEST, base, NCLS, 2, 0) != s0, 1);
    check("global font changes sig",
          mf_logsig(1, "/usr/data/mnt/sd_0/MeowOS/fonts/default/regular/font.png",
                    base, NCLS, 2, 0) != s0, 1);
    {
        const char *c[NCLS] = { NULL, NULL, C_MISANS, C_GOOGLE, NULL, NULL };
        check("class_num changes sig", mf_logsig(1, G_ZTEST, c, NCLS, 2, 0) != s0, 1);
    }
    check("distinct 2->1 changes sig", mf_logsig(1, G_ZTEST, base, NCLS, 1, 0) != s0, 1);
    check("truncated 0->1 changes sig", mf_logsig(1, G_ZTEST, base, NCLS, 2, 1) != s0, 1);
    check("config-fail (-1) changes sig", mf_logsig(1, G_ZTEST, base, NCLS, -1, 0) != s0, 1);

    /* ---- 3. 空配置项形态：NULL 与 "" 等价（settings 空值 = 该类回退全局）---- */
    {
        const char *a[NCLS] = { NULL, NULL, NULL, NULL, NULL, NULL };
        const char *b[NCLS] = { "", "", "", "", "", "" };
        check("NULL == \"\"", mf_logsig(1, G_ZTEST, a, NCLS, 1, 0) ==
                              mf_logsig(1, G_ZTEST, b, NCLS, 1, 0), 1);
        check("null cpng array tolerated", mf_logsig(1, G_ZTEST, NULL, NCLS, 1, 0) > 0, 1);
    }

    /* ---- 4. 字段边界不串味：("ab","c") 与 ("a","bc") 不能撞 ---- */
    {
        const char *x[NCLS] = { "ab", "c", NULL, NULL, NULL, NULL };
        const char *y[NCLS] = { "a", "bc", NULL, NULL, NULL, NULL };
        check("field boundary no collision",
              mf_logsig(1, G_ZTEST, x, NCLS, 2, 0) != mf_logsig(1, G_ZTEST, y, NCLS, 2, 0), 1);
    }

    /* ---- 5. 门控：60s 空转（2s 一次 × 30）只打 1 条；改配置再打 1 条；改回来再打 1 条 ---- */
    {
        uint64_t last = 0;
        int valid = 0, emits = 0;
        for (int i = 0; i < 30; i++) {             /* 首轮 + 29 轮空转 */
            uint64_t sig = mf_logsig(1, G_ZTEST, base, NCLS, 2, 0);
            if (mf_logsig_changed(&last, &valid, sig)) emits++;
        }
        check("60s idle @2s -> exactly 1 log line", emits, 1);
        {
            const char *c[NCLS] = { NULL, NULL, C_MISANS, C_GOOGLE, NULL, NULL };
            uint64_t sig = mf_logsig(1, G_ZTEST, c, NCLS, 2, 0);
            if (mf_logsig_changed(&last, &valid, sig)) emits++;
        }
        check("class change -> 2nd log line", emits, 2);
        for (int i = 0; i < 30; i++) {             /* 再空转 60s：不应再增长 */
            uint64_t sig = mf_logsig(1, G_ZTEST, base, NCLS, 2, 0);
            if (mf_logsig_changed(&last, &valid, sig)) emits++;
        }
        check("back to original -> 3rd line, then silent", emits, 3);
        /* 真实行数：旧实现 60s = 30 行（每 2s 一条），新实现 60s = 0 行（稳定后） */
        printf("  (旧实现 60s 空转 = 30 行；新实现稳态 = 0 行，本用例全程 %d 行)\n", emits);
    }

    printf("\n%d pass, %d fail\n", g_pass, g_fail);
    return g_fail ? 1 : 0;
}