/* @tier medium @module rc @transform reconciliation-online */
/*
 * rc_ol_0002.pgc - 승인-매입 대사 (단건 판정) 온라인 서비스 (RC_OL_0002)
 *
 * 요청 KEY 의 원장 1건을 읽어 "승인금액(입력 APPRAMT)" 과 "매입금액
 * (원장 amount)" 을 대사한다. 두 금액이 일치하면 매입확정('M'),
 * 불일치하면 불일치('U') 로 상태를 전이하고 차액을 응답에 싣는다.
 */
#include <stdio.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(RC_OL_0002, ctx)
{
    rc_rec_t rec;
    char key[16];
    long appr_amt = 0;   /* 승인계에서 넘어온 승인금액 */
    long diff;
    int  rc;
    const char *new_st;

    tx_log(TX_LOG_INFO, "[RC_OL_0002] 승인-매입 대사(단건) 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[RC_OL_0002] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (tx_buf_getlong(ctx->in, "APPRAMT", &appr_amt) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[RC_OL_0002] APPRAMT(승인금액) 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    memset(&rec, 0, sizeof(rec));
    rc = rc_rec_select(key, &rec);
    if (rc != TX_OK) {
        tx_log(TX_LOG_WARN, "[RC_OL_0002] 원장 조회 실패 key=%s rc=%d(%s)",
               key, rc, tx_strerror(rc));
        tx_return(ctx, rc, ctx->out);
        return;
    }

    /* 대사 판정: 승인금액 == 매입금액 ? */
    diff = rec.amount - appr_amt;
    if (diff == 0) {
        new_st = RC_ST_DONE;   /* 매입확정 */
        tx_log(TX_LOG_INFO, "[RC_OL_0002] 승인-매입 일치 key=%s amount=%ld",
               key, rec.amount);
    } else {
        new_st = RC_ST_FAIL;   /* 금액 불일치 */
        tx_log(TX_LOG_WARN, "[RC_OL_0002] 승인-매입 불일치 key=%s 차액=%ld",
               key, diff);
    }

    rc = rc_rec_update_status(key, new_st);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[RC_OL_0002] 상태전이 실패 key=%s rc=%d", key, rc);
        tx_return(ctx, rc, ctx->out);
        return;
    }

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "KEY", rec.key);
    tx_buf_setlong(ctx->out, "APPRAMT", appr_amt);
    tx_buf_setlong(ctx->out, "CAPAMT", rec.amount);
    tx_buf_setlong(ctx->out, "DIFF", diff);
    tx_buf_sets(ctx->out, "STATUS", new_st);
    tx_buf_sets(ctx->out, "RESULT", (diff == 0) ? "MATCH" : "UNMATCH");

    /* 승인-매입 대사 결과를 대사이력(rc_match_log)에 임베디드 SQL 로 적재 */
    {
        EXEC SQL BEGIN DECLARE SECTION;
        char h_ml_key[16];
        long h_ml_appr;
        long h_ml_cap;
        long h_ml_diff;
        char h_ml_status[2];
        EXEC SQL END DECLARE SECTION;

        strncpy(h_ml_key, key, sizeof(h_ml_key) - 1);
        h_ml_key[sizeof(h_ml_key) - 1] = '\0';
        h_ml_appr = appr_amt;
        h_ml_cap  = rec.amount;
        h_ml_diff = diff;
        strncpy(h_ml_status, new_st, sizeof(h_ml_status) - 1);
        h_ml_status[sizeof(h_ml_status) - 1] = '\0';

        if (tx_begin() == TX_OK) {
            EXEC SQL INSERT INTO rc_match_log
                (rec_key, appr_amt, cap_amt, diff_amt, new_status)
                VALUES (:h_ml_key, :h_ml_appr, :h_ml_cap, :h_ml_diff, :h_ml_status);
            if (sqlca.sqlcode != TX_SQL_OK) {
                TX_DBIO_LOG_ERR("INSERT rc_match_log");
                tx_abort();
            } else {
                tx_commit();
            }
        }
    }

    tx_return(ctx, TX_OK, ctx->out);
}
