/* @tier easy @module ac @transform acquire-online */
/*
 * ac_ol_0018.pgc - 매입 온라인 서비스 (AC_OL_0018)  [tier=easy]
 *
 * 매입-승인 대사연계: 매입 원장 금액과 카드사 승인 금액을 대사하여
 * 일치 여부에 따라 매입 상태를 완료/불일치로 전이한다.
 */
#include <stdio.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(AC_OL_0018, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    char h_approval_no[16];
    long h_ledger_amt;
    long h_appr_amt;
    EXEC SQL END DECLARE SECTION;

    char key[16], apprno[16];
    char won_ledger[32], won_appr[32];
    long diff;
    int  match;
    const char *newstatus;
    int  rc;

    tx_log(TX_LOG_INFO, "[AC_OL_0018] 매입-승인 대사연계 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK ||
        tx_buf_get(ctx->in, "APPROVALNO", apprno, sizeof(apprno)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0018] 필수 필드(KEY/APPROVALNO) 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (key[0] == '\0' || apprno[0] == '\0') {
        tx_log(TX_LOG_ERROR, "[AC_OL_0018] KEY/APPROVALNO 빈 값");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

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

    EXEC SQL SELECT amount
        INTO :h_ledger_amt
        FROM ac_ledger
        WHERE key = :h_key;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0018] 매입 원장 없음 key=%s", key);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT ac_ledger amount");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    EXEC SQL SELECT amount
        INTO :h_appr_amt
        FROM approval
        WHERE approval_no = :h_approval_no;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0018] 승인내역 없음 approvalno=%s", apprno);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT approval amount");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    diff  = h_ledger_amt - h_appr_amt;
    match = (diff == 0) ? 1 : 0;
    newstatus = match ? AC_ST_DONE : AC_ST_FAIL;

    amount_format_won(h_ledger_amt, won_ledger, sizeof(won_ledger));
    amount_format_won(h_appr_amt, won_appr, sizeof(won_appr));

    if (match) {
        tx_log(TX_LOG_INFO,
               "[AC_OL_0018] 대사일치 key=%s 원장=%s 승인=%s",
               key, won_ledger, won_appr);
    } else {
        tx_log(TX_LOG_WARN,
               "[AC_OL_0018] 대사불일치 key=%s 원장=%s 승인=%s diff=%ld",
               key, won_ledger, won_appr, diff);
    }

    if (tx_begin() != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0018] 트랜잭션 시작 실패");
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    rc = ac_rec_update_status(key, newstatus);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0018] 상태전이 실패 key=%s rc=%d(%s)",
               key, rc, tx_strerror(rc));
        tx_abort();
        tx_return(ctx, rc, ctx->out);
        return;
    }

    tx_commit();

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_setlong(ctx->out, "MATCH", (long)match);
    tx_buf_setlong(ctx->out, "DIFF", diff);
    tx_buf_sets(ctx->out, "STATUS", newstatus);

    tx_log(TX_LOG_INFO, "[AC_OL_0018] 완료 key=%s match=%d diff=%ld status=%s",
           key, match, diff, newstatus);
    tx_return(ctx, TX_OK, ctx->out);
}
