/* 隔离单测: 设备时钟同步模块 (方案B) — 与 net_srv.c dev_time_sync/dev_time_now 同构 */
#include <stdio.h>
#include <stdint.h>

static uint32_t _mock_ms = 0;
static uint32_t mstick(void) { return _mock_ms; }
#define PRINT(...) do{}while(0)

/* ── 被测: 与固件同构 ── */
static uint32_t _dev_time_base_unix = 0;
static uint32_t _dev_time_base_tick = 0;
void dev_time_sync(uint32_t unix_ts) {
    if (unix_ts < 1600000000UL) return;
    _dev_time_base_unix = unix_ts;
    _dev_time_base_tick = mstick();
}
uint32_t dev_time_now(void) {
    if (_dev_time_base_unix == 0) return (uint32_t)(mstick() / 1000);
    return _dev_time_base_unix + (uint32_t)((mstick() - _dev_time_base_tick) / 1000);
}

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

int main(void) {
    /* T1: 未同步 → 返回上电秒数 */
    _mock_ms = 372000;                         /* 上电 372s */
    CHECK(dev_time_now() == 372, "T1 未同步=上电秒数372");

    /* T2: 非法 ts(上电秒数/0/小值) 被门槛挡掉, 不污染基准 */
    dev_time_sync(372);
    dev_time_sync(0);
    dev_time_sync(1599999999UL);               /* 门槛下沿-1 */
    CHECK(_dev_time_base_unix == 0, "T2 非法ts被拒, 仍未同步");
    CHECK(dev_time_now() == 372, "T2 仍退回上电秒数");

    /* T3: 平台经 report_config 下发真 Unix 时间 → 校准 */
    uint32_t T = 1784000000UL;                 /* 某真实 Unix 秒 (>2020) */
    _mock_ms = 373000;                         /* 校准时刻 373s */
    dev_time_sync(T);
    CHECK(dev_time_now() == T, "T3 校准瞬间 = 下发 Unix 时间");

    /* T4: 校准后随 mstick 前进, 真时间同步递增 */
    _mock_ms = 373000 + 60000;                 /* 60s 后 */
    CHECK(dev_time_now() == T + 60, "T4 60s后 = T+60");
    _mock_ms = 373000 + 3600000;               /* 1h 后 */
    CHECK(dev_time_now() == T + 3600, "T4 1h后 = T+3600");

    /* T5: 门槛边界 (>=1600000000 才认) */
    _dev_time_base_unix = 0; _dev_time_base_tick = 0; _mock_ms = 1000;
    dev_time_sync(1600000000UL);
    CHECK(_dev_time_base_unix == 1600000000UL, "T5 门槛下沿被接受");

    /* T6: mstick 49.7天回绕 — 无符号相减仍正确 */
    _dev_time_base_unix = T;
    _dev_time_base_tick = 0xFFFFFF00UL;        /* 接近 uint32 上限 */
    _mock_ms = 0x00000100UL;                   /* 回绕后 = 基准 + 512ms */
    /* 经过 (0x100 - 0xFFFFFF00) mod 2^32 = 0x200 = 512ms → +0s (整除) */
    CHECK(dev_time_now() == T + 0, "T6 回绕512ms → +0s (无符号相减正确)");
    _mock_ms = 0x00000100UL + 5000;            /* +5.5s */
    CHECK(dev_time_now() == T + 5, "T6 回绕后 +5s 正确");

    printf(fails ? "\n== %d FAIL ==\n" : "\n== ALL PASS ==\n", fails);
    return fails;
}