/* @tier easy @module vl @transform validation-online */
/*
 * vl_ol_0027.pgc - 정합성 재검증 서비스 (VL_OL_0027)  [tier=easy]
 *
 * 불일치(status='U') 단건을 대상으로 원천(vl_recheck_src) 의 금액/가맹점을
 * 다시 대조하여, 정합이면 상태를 완료(M) 로 전이한다.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "txcore.h"
#include "txcore_dbio.h"
#include "acq_util.h"
#include "vl_core.h"

EXEC SQL INCLUDE sqlca;

TX_SERVICE(VL_OL_0027, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    long h_src_amt;
    char h_src_merch[16];
    EXEC SQL END DECLARE SECTION;

    vl_rec_t rec;
    char key[16];
    int  rc;

    tx_log(TX_LOG_INFO, "[VL_OL_0027] 정합성 재검증 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[VL_OL_0027] KEY 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "VL2700");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    memset(&rec, 0, sizeof(rec));
    rc = vl_rec_select(key, &rec);
    if (rc != TX_OK) {
        tx_log(TX_LOG_WARN, "[VL_OL_0027] 원장 조회 실패 key=%s rc=%d(%s)",
               key, rc, tx_strerror(rc));
        tx_buf_sets(ctx->out, "ERRCODE", "VL2701");
        tx_return(ctx, rc, ctx->out);
        return;
    }

    /* 재검증 대상은 불일치(U) 건에 한한다 */
    if (strcmp(rec.status, VL_ST_FAIL) != 0) {
        tx_log(TX_LOG_WARN, "[VL_OL_0027] 대상아님 key=%s status=%s",
               key, rec.status);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "KEY", key);
        tx_buf_sets(ctx->out, "STATUS", rec.status);
        tx_buf_sets(ctx->out, "RESULT", "SKIP");
        tx_buf_sets(ctx->out, "ERRCODE", "VL2702");
        tx_return(ctx, TX_OK, ctx->out);
        return;
    }

    strncpy(h_key, key, sizeof(h_key) - 1);
    h_key[sizeof(h_key) - 1] = '\0';

    memset(h_src_merch, 0, sizeof(h_src_merch));
    h_src_amt = 0;
    EXEC SQL
        SELECT src_amount, src_merch_id
          INTO :h_src_amt, :h_src_merch
          FROM vl_recheck_src
         WHERE txn_key = :h_key;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[VL_OL_0027] 재검증 원천 없음 key=%s", key);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "KEY", key);
        tx_buf_sets(ctx->out, "RESULT", "NOSOURCE");
        tx_buf_sets(ctx->out, "ERRCODE", "VL2703");
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT vl_recheck_src");
        tx_buf_sets(ctx->out, "ERRCODE", "VL2709");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_setlong(ctx->out, "LEDGERAMT", rec.amount);
    tx_buf_setlong(ctx->out, "SRCAMT", h_src_amt);

    /* 금액·가맹점 모두 일치해야 재검증 통과 */
    if (rec.amount != h_src_amt || strcmp(rec.merch_id, h_src_merch) != 0) {
        tx_log(TX_LOG_WARN,
               "[VL_OL_0027] 재검증 여전 불일치 key=%s led=%ld src=%ld",
               key, rec.amount, h_src_amt);
        tx_buf_sets(ctx->out, "RESULT", "STILLFAIL");
        tx_buf_sets(ctx->out, "ERRCODE", "VL2704");
        tx_return(ctx, TX_OK, ctx->out);
        return;
    }

    rc = vl_rec_update_status(key, VL_ST_DONE);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[VL_OL_0027] 상태전이 실패 key=%s rc=%d(%s)",
               key, rc, tx_strerror(rc));
        tx_buf_sets(ctx->out, "ERRCODE", "VL2705");
        tx_return(ctx, rc, ctx->out);
        return;
    }

    tx_buf_sets(ctx->out, "STATUS", VL_ST_DONE);
    tx_buf_sets(ctx->out, "RESULT", "RESOLVED");
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[VL_OL_0027] 재검증 정합→완료 key=%s amt=%ld",
           key, rec.amount);
    tx_return(ctx, TX_OK, ctx->out);
}
