/* test_wd_fw.c — 宿主单测：meow_watchdog 的纯逻辑（M2.86 框架 App 判定 + M20 亮屏亮度）。
 *
 * 编译：#include meow_watchdog.c（去 main 拿 wd_app_is_framework/json_str/from_pid、
 *       wd_bri_decide、wd_settings_brightness、wd_panel_off/on）。
 *   gcc -Wall -Wextra -Os -DWd_NO_MAIN -Wno-unused-function -Wno-unused-parameter \
 *       test_wd_fw.c -o test_wd_fw
 *   （meow_watchdog.c 含仅 main 使用的静态函数，宿主去 main 后须 -Wno-unused-function 静音；
 *     mips 目标构建不定义 WD_NO_MAIN，不受影响。）
 * 运行：./test_wd_fw；全 PASS -> exit 0。
 * M20 用例用 env MEOW_BACKLIGHT / MEOW_SETTINGS_FILE 把背光与 settings 指到临时文件，
 * 真的走 wd_panel_off/wd_panel_on 的读写路径（真机无这两个 env，走 /sys 与 /usr/data 默认）。
 */
#define WD_NO_MAIN
#include "meow_watchdog.c"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>

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); }
}

/* 临时目录根：优先 $TMPDIR（Termux/Android 上 /tmp 属于 shell 用户、本进程不可写），
 * 否则 /tmp（Linux 构建容器）。让 `build_watchdog.sh host` 在两种环境都能直接跑。 */
static const char *tmp_root(void)
{
    const char *t = getenv("TMPDIR");
    return (t && t[0]) ? t : "/tmp";
}

/* ---- M2.87：SIGUSR1 手势让位（handle_touch 左缘滑动分支）----
 * 判定（meow_watchdog.c）：`!g_fw_app && immersive` 才发 SIGUSR1（只给裸沉浸 App）；
 * SDK 框架 App（g_fw_app=1）不发（返回由 SDK on_swipe 处理），防 SIGUSR1 杀死 App。 */
static volatile int g_sigusr1_hits = 0;
static void on_sigusr1(int s) { (void)s; g_sigusr1_hits++; }

/* 经 handle_touch 模拟一次「左缘起点+向右滑」完整手势（press→release），返回 SIGUSR1 命中数。 */
static int sim_swipe_sigusr1(int fw, int immersive)
{
    g_fw_app = fw;
    g_sigusr1_hits = 0;
    last_x = 5; last_y = 300;                 /* 左缘原点（x<EDGE_W=24） */
    unsigned long long now = now_ms();
    handle_touch(immersive, getpid(), now - 3000, 1);  /* press（过冷却期 + 坐标就绪） */
    last_x = 100;                              /* 向右滑 95px（>SWIPE_DX=50） */
    handle_touch(immersive, getpid(), now - 3000, 0);  /* release */
    return g_sigusr1_hits;
}

/* 在 <base>/<name> 建目录并写 app.json；写失败返回 -1。 */
static int fixture(const char *base, const char *name, const char *appjson)
{
    char dir[512], path[560];
    snprintf(dir, sizeof dir, "%s/%s", base, name);
    if (mkdir(dir, 0755) != 0 && access(dir, F_OK) != 0) return -1;
    snprintf(path, sizeof path, "%s/app.json", dir);
    FILE *f = fopen(path, "w");
    if (!f) return -1;
    fputs(appjson, f);
    fclose(f);
    return 0;
}

static int expect_fw(const char *base, const char *name, const char *appjson, int want)
{
    char dir[512];
    snprintf(dir, sizeof dir, "%s/%s", base, name);
    if (fixture(base, name, appjson) != 0) { g_fail++; printf("FAIL %s: cannot write fixture\n", name); return 0; }
    char label[256];
    snprintf(label, sizeof label, "is_fw(%s)", name);
    check(label, wd_app_is_framework(dir), want);
    return 1;
}

/* ---- M20：亮屏亮度决策（wd_bri_decide 纯函数）----
 * 真机 bug（0.8.46，2026-11-05）：settings display.brightness=1，亮屏时 watchdog 写入固定 60
 * 覆盖它。新语义：settings 优先 → 真实快照 → 面板已亮则不写 → 面板黑才写安全低亮。 */
static void test_bri_decide(void)
{
    const char *src = NULL;
    int v;

    v = wd_bri_decide(1, 60, 60, &src);   /* 用户值 1 对上被污染的 60/当前 60：必须写 1 */
    check("bri: settings wins over saved/cur", v == 1 && !strcmp(src, "settings"), 1);
    v = wd_bri_decide(7, 0, 7, &src);
    check("bri: settings 7", v == 7 && !strcmp(src, "settings"), 1);
    v = wd_bri_decide(-1, 42, 3, &src);   /* settings 不可读 → 用真实快照 */
    check("bri: snapshot fallback", v == 42 && !strcmp(src, "snapshot"), 1);
    v = wd_bri_decide(-1, 0, 3, &src);    /* 都未知但面板已亮 → 不写（核心修复） */
    check("bri: untouched keeps cur", v == -1 && !strcmp(src, "untouched"), 1);
    v = wd_bri_decide(-1, 0, 0, &src);    /* 都未知且面板黑 → 安全低亮，绝不 60 */
    check("bri: safe-low not 60", v == WD_BRI_SAFE_LOW && v != 60 && v > 0 &&
                                  !strcmp(src, "safe-low"), 1);
    v = wd_bri_decide(-1, 0, -1, &src);   /* 背光读失败按「黑」处理，仍要点亮 */
    check("bri: read-fail -> safe-low", v == WD_BRI_SAFE_LOW && !strcmp(src, "safe-low"), 1);
    v = wd_bri_decide(0, -1, 5, &src);    /* 非正值一律按「未知」，不当作亮度 */
    check("bri: non-positive treated unknown", v == -1 && !strcmp(src, "untouched"), 1);
}

/* ---- M20：settings 解析 + 重试 ----
 * 用真机 /usr/data/meow/settings.conf 的关键行断言「路径/键名/解析/clamp 都是对的」，
 * 证明真机写 60 不是本函数返回 -1（原因见报文：出货二进制根本没编进这段代码）。 */
static void test_settings_brightness(void)
{
    char path[600];
    snprintf(path, sizeof path, "%s/wdsetXXXXXX", tmp_root());
    int fd = mkstemp(path);
    if (fd < 0) { g_fail++; printf("FAIL settings: mkstemp\n"); return; }
    FILE *f = fdopen(fd, "w");
    fputs("# meow-settings 1\n"
          "display.brightness = 1\n"
          "display.brightness_min = 1\n"
          "audio.volume = 10\n", f);
    fclose(f);
    setenv("MEOW_SETTINGS_FILE", path, 1);
    check("settings: device file -> 1", wd_settings_brightness(), 1);

    f = fopen(path, "w");   /* clamp 抬到 brightness_min */
    fputs("display.brightness = 0\ndisplay.brightness_min = 3\n", f);
    fclose(f);
    check("settings: clamp up to min", wd_settings_brightness(), 3);

    f = fopen(path, "w");   /* clamp 压到 100 */
    fputs("display.brightness = 200\ndisplay.brightness_min = 1\n", f);
    fclose(f);
    check("settings: clamp down to 100", wd_settings_brightness(), 100);

    f = fopen(path, "w");   /* 键缺失：与 launcher 设置表同默认 101 -> clamp 100 */
    fputs("audio.volume = 10\n", f);
    fclose(f);
    check("settings: missing key -> 100", wd_settings_brightness(), 100);

    /* 不可读（原子替换/未挂载窗口）：open 重试 3 次仍失败才 -1，总耗时 ≈ 20ms */
    unlink(path);
    unsigned long long t0 = now_ms();
    int r = wd_settings_brightness();
    unsigned long long dt = now_ms() - t0;
    check("settings: missing -> -1", r, -1);
    check("settings: open retried (>=15ms)", dt >= 15, 1);
    unsetenv("MEOW_SETTINGS_FILE");
}

static void put_file(const char *path, const char *body)
{
    FILE *f = fopen(path, "w");
    if (!f) return;
    fputs(body, f);
    fclose(f);
}

static int get_file_int(const char *path)
{
    FILE *f = fopen(path, "r");
    if (!f) return -1;
    int v = -1;
    if (fscanf(f, "%d", &v) != 1) v = -1;
    fclose(f);
    return v;
}

/* ---- M20：panel OFF/ON 端到端（真的读写一个「背光文件」，不 mock 函数）----
 * 复现真机场景：settings display.brightness=1 → 熄屏 → 亮屏。旧代码亮屏写 60，
 * 新代码必须写 1；且 settings 不可读、快照未知时保持当前值而不是回退 60。 */
static void test_panel_brightness_e2e(void)
{
    char bl[600], st[600];
    snprintf(bl, sizeof bl, "%s/wdblXXXXXX", tmp_root());
    snprintf(st, sizeof st, "%s/wdstXXXXXX", tmp_root());
    int fd = mkstemp(bl);
    if (fd < 0) { g_fail++; printf("FAIL e2e: mkstemp bl\n"); return; }
    close(fd);
    fd = mkstemp(st);
    if (fd < 0) { g_fail++; printf("FAIL e2e: mkstemp st\n"); unlink(bl); return; }
    close(fd);
    setenv("MEOW_BACKLIGHT", bl, 1);
    setenv("MEOW_SETTINGS_FILE", st, 1);

    /* 1) 真机 bug 场景：settings=1、屏亮 1 → OFF 快照 1；ON 必须写 1，绝不 60 */
    put_file(bl, "1\n");
    put_file(st, "display.brightness = 1\ndisplay.brightness_min = 1\n");
    wd_saved_bri = WD_BRI_UNKNOWN;
    wd_panel_off();
    check("e2e: panel OFF writes 0", get_file_int(bl), 0);
    check("e2e: panel OFF snapshot = 1", wd_saved_bri, 1);
    wd_panel_on();
    check("e2e: panel ON restores settings 1 (not 60)", get_file_int(bl), 1);

    /* 2) 用户改了亮度：settings 仍是唯一权威（旧快照 1 不得覆盖 5） */
    put_file(st, "display.brightness = 5\ndisplay.brightness_min = 1\n");
    put_file(bl, "0\n");
    wd_panel_on();
    check("e2e: panel ON follows new settings 5", get_file_int(bl), 5);

    /* 3) settings 不可读 + 快照未知 + 屏亮 3 → 不写（保持 3，不再回退 60） */
    unlink(st);
    put_file(bl, "3\n");
    wd_saved_bri = WD_BRI_UNKNOWN;
    wd_panel_on();
    check("e2e: panel ON leaves 3 untouched", get_file_int(bl), 3);

    /* 4) settings 不可读 + 快照未知 + 屏黑 0 → 写安全低亮（>0 且 != 60） */
    put_file(bl, "0\n");
    wd_panel_on();
    check("e2e: panel ON dark -> safe-low", get_file_int(bl), WD_BRI_SAFE_LOW);

    /* 5) settings 不可读但本次运行期真观测到 7 → 快照优先于「不动」 */
    put_file(bl, "7\n");
    wd_saved_bri = WD_BRI_UNKNOWN;
    wd_panel_off();   /* 观测到 7，写 0 */
    check("e2e: panel OFF snapshot = 7", wd_saved_bri, 7);
    wd_panel_on();
    check("e2e: panel ON uses real snapshot 7", get_file_int(bl), 7);

    unlink(bl);
    unsetenv("MEOW_BACKLIGHT");
    unsetenv("MEOW_SETTINGS_FILE");
}

int main(void)
{
    signal(SIGUSR1, on_sigusr1);   /* 捕获 handle_touch 可能发出的 SIGUSR1（测命中） */
    char dir[600];
    snprintf(dir, sizeof dir, "%s/wdfwXXXXXX", tmp_root());
    if (!mkdtemp(dir)) { perror("mkdtemp"); return 2; }

    /* 框架 App：各值形态 */
    expect_fw(dir, "v_num",  "{\"name\":\"x\",\"framework\":1,\"exec\":\"/a/b\"}", 1);        /* JSON 数值 1 */
    expect_fw(dir, "v_true", "{\"name\":\"x\",\"framework\":true}", 1);                     /* true */
    expect_fw(dir, "v_yes",  "framework=yes", 1);                                           /* 扁平 yes */
    expect_fw(dir, "v_str",  "{\"framework\":\"true\"}", 1);                                /* 字符串 "true" */
    expect_fw(dir, "v_space","{\"name\":\"x\", \"framework\" :  1 }", 1);                    /* 空格容错 */

    /* 非框架 App */
    expect_fw(dir, "v_zero", "{\"name\":\"x\",\"framework\":0}", 0);                         /* 数值 0 */
    expect_fw(dir, "v_false","{\"framework\":false}", 0);                                    /* false */
    expect_fw(dir, "v_none", "{\"name\":\"x\",\"exec\":\"/a/b\"}", 0);                       /* 无 framework 键 */
    expect_fw(dir, "v_sub",  "{\"x_framework\":1}", 0);                                      /* 键前缀歧义：不误判 */

    /* 多行 JSON（framework 单独一行，值独立） */
    expect_fw(dir, "multiline",
              "{\n  \"name\": \"x\",\n  \"framework\": 1,\n  \"exec\": \"/a/b\"\n}\n", 1);

    /* wd_json_str 直接断言（防 "myframework" / 前缀干扰） */
    {
        char out[16] = "";
        check("json_str exact", wd_json_str("{\"framework\":1}", "framework", out, sizeof out) > 0 &&
                                !strcmp(out, "1"), 1);
        check("json_str prefix-reject",
              wd_json_str("{\"x_framework\":1}", "framework", out, sizeof out), 0);
        check("json_str no-hit", wd_json_str("{\"name\":\"x\"}", "framework", out, sizeof out), 0);
    }

    /* wd_framework_from_pid：自进程 /proc/self/exe 目录无 app.json -> 0，不崩 */
    check("from_pid(no app.json)", wd_framework_from_pid(getpid()), 0);

    /* ---- M2.87 SIGUSR1 让位判定（仅裸沉浸 App 发 SIGUSR1）---- */
    check("sigusr1 fw-app (framework=1) -> 0", sim_swipe_sigusr1(1, 1), 0);   /* SDK 框架 App：不发 */
    check("sigusr1 bare-immersive -> 1",       sim_swipe_sigusr1(0, 1), 1);   /* 裸沉浸：发（命中） */
    check("sigusr1 bare-nonimmersive -> 0",    sim_swipe_sigusr1(0, 0), 0);   /* 裸非沉浸：不发 */

    /* ---- M20：亮屏亮度（决策 + settings 解析/重试 + panel OFF/ON 端到端）---- */
    test_bri_decide();
    test_settings_brightness();
    test_panel_brightness_e2e();

    /* 清理 */
    {
        char path[560];
        const char *names[] = { "v_num","v_true","v_yes","v_str","v_space","v_zero",
                                "v_false","v_none","v_sub","multiline" };
        for (unsigned i = 0; i < sizeof names / sizeof names[0]; i++) {
            snprintf(path, sizeof path, "%s/%s/app.json", dir, names[i]); unlink(path);
            snprintf(path, sizeof path, "%s/%s", dir, names[i]); rmdir(path);
        }
        rmdir(dir);
    }

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