/* test_job_dispatch_fail_count.c — scheduler-dispatch-commit task 1.3
 *
 * Proves job_t.dispatch_fail_count (xce/types.h) -- a new in-memory-only
 * uint32_t counter on the job_t wrapper ({xce_job_t job; uint64_t
 * submit_lsn;}), NOT on xce_job_t itself -- exists and behaves as a plain,
 * directly settable/readable/resettable scalar (Requirement 4.3, design.md
 * "Logical Data Model": "in-memory only... following submit_lsn's exact
 * precedent... recomputed... never serialized").
 *
 * This task is the data-model addition ONLY. It does NOT wire any
 * increment/reset call site into dispatch_a_job_() (task 3.1/3.3's job) and
 * does NOT implement the bounded-retry threshold check (also task 3.3).
 * Every test here manipulates the field directly on a bare stack-local
 * job_t -- no jobmgr/RTTI/makeJob machinery -- mirroring
 * test_persist_types.c's test_slot_key_t_fields precedent for a plain
 * struct-field addition, since this is not a behavioral/dispatch-path test.
 */
#include <stdint.h>
#include <stdio.h>
#include <string.h>

#include <unity/unity.h>

#include "xce/types.h"

static void test_dispatch_fail_count_default_zero(void)
{
    job_t j;
    memset(&j, 0, sizeof(j));

    TEST_ASSERT_EQUAL_UINT32(0, j.dispatch_fail_count);
    printf("test_dispatch_fail_count_default_zero: PASS\n");
}

static void test_dispatch_fail_count_increments_independently(void)
{
    job_t j;
    memset(&j, 0, sizeof(j));

    /* Simulates 3 consecutive retryable dispatch failures with no
     * intervening successful dispatch (Requirement 4.3) -- incremented
     * directly, with no actual dispatch attempt involved. */
    j.dispatch_fail_count++;
    TEST_ASSERT_EQUAL_UINT32(1, j.dispatch_fail_count);

    j.dispatch_fail_count++;
    j.dispatch_fail_count++;
    TEST_ASSERT_EQUAL_UINT32_MESSAGE(3, j.dispatch_fail_count,
        "counter must be incrementable directly, independent of any actual "
        "dispatch attempt (Observable completion)");
    printf("test_dispatch_fail_count_increments_independently: PASS\n");
}

static void test_dispatch_fail_count_resets_to_zero(void)
{
    job_t j;
    memset(&j, 0, sizeof(j));

    j.dispatch_fail_count = 7;
    TEST_ASSERT_EQUAL_UINT32(7, j.dispatch_fail_count);

    /* A successful dispatch resets the counter to zero -- task 3.1/3.3 wire
     * the real call site; this proves the field itself supports the
     * reset-to-zero operation the design requires, independent of any
     * actual dispatch attempt. */
    j.dispatch_fail_count = 0;
    TEST_ASSERT_EQUAL_UINT32_MESSAGE(0, j.dispatch_fail_count,
        "counter must be independently resettable to zero, matching "
        "submit_lsn's in-memory-only precedent (no durability obligation, "
        "safe to lose across a controller failover)");
    printf("test_dispatch_fail_count_resets_to_zero: PASS\n");
}

static void test_dispatch_fail_count_does_not_alias_submit_lsn(void)
{
    job_t j;
    memset(&j, 0, sizeof(j));

    j.submit_lsn          = 12345;
    j.dispatch_fail_count = 6;

    TEST_ASSERT_EQUAL_UINT64(12345, j.submit_lsn);
    TEST_ASSERT_EQUAL_UINT32_MESSAGE(6, j.dispatch_fail_count,
        "dispatch_fail_count must be its own field on job_t, distinct from "
        "submit_lsn (both in-memory-only siblings on the wrapper struct)");
    printf("test_dispatch_fail_count_does_not_alias_submit_lsn: PASS\n");
}

void test_job_dispatch_fail_count(void)
{
    UnitySetTestFile(__FILE__);
    printf("\n>> job_t.dispatch_fail_count test\n\n");

    RUN_TEST(test_dispatch_fail_count_default_zero);
    RUN_TEST(test_dispatch_fail_count_increments_independently);
    RUN_TEST(test_dispatch_fail_count_resets_to_zero);
    RUN_TEST(test_dispatch_fail_count_does_not_alias_submit_lsn);
}