/* @tier easy @module cl @transform closing-online */
/*
 * cl_ol_0013.pgc - 마감 온라인 서비스 (CL_OL_0013)  [tier=easy]
 *
 * 월마감 요청. 요청 년월(YYYYMM)에 해당하는 한 달치 원장의 처리완료(M)/
 * 불일치(U) 건을 정산완료(S)로 월(月)단위 일괄 마감한다. biz_date 가 해당
 * 년월로 시작하는지는 C 에서 'YYYYMM%' 패턴 문자열을 만들어 LIKE :h_pat
 * 로 판별한다. 월 마감건수와 금액합계를 응답한다. (tx_begin/tx_commit)
 */
#include <stdio.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(CL_OL_0013, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_pat[16];
    int  h_target_cnt;
    long h_settle_sum;
    EXEC SQL END DECLARE SECTION;

    char ym[16];
    char probe[9];
    int  i;
    long month_cnt = 0;
    char won[40];

    tx_log(TX_LOG_INFO, "[CL_OL_0013] 월마감 요청 서비스 진입");

    /* 1. 요청 검증 : YYYYMM 6자리 숫자 */
    if (tx_buf_get(ctx->in, "YYYYMM", ym, sizeof(ym)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[CL_OL_0013] YYYYMM 누락");
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (strlen(ym) != 6) {
        tx_log(TX_LOG_WARN, "[CL_OL_0013] 년월 길이 오류 ym=%s", ym);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    for (i = 0; i < 6; i++) {
        if (ym[i] < '0' || ym[i] > '9') {
            tx_log(TX_LOG_WARN, "[CL_OL_0013] 년월 형식 오류 ym=%s", ym);
            tx_buf_reset(ctx->out);
            tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
            tx_return(ctx, TX_EINVAL, ctx->out);
            return;
        }
    }
    /* YYYYMM01 로 조립해 실재 년월 유효성 재확인 */
    snprintf(probe, sizeof(probe), "%.6s01", ym);
    if (!date_is_valid(probe)) {
        tx_log(TX_LOG_WARN, "[CL_OL_0013] 유효하지 않은 년월 ym=%s", ym);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    /* 2. LIKE 패턴 조립 : 'YYYYMM%' */
    snprintf(h_pat, sizeof(h_pat), "%.6s%%", ym);

    /* 3. 월마감 대상(M/U) 사전 건수 확인 */
    EXEC SQL SELECT count(*)
        INTO :h_target_cnt
        FROM cl_ledger
        WHERE biz_date LIKE :h_pat
          AND status IN ('M', 'U');
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("CL_OL_0013 target count");
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (h_target_cnt == 0) {
        tx_log(TX_LOG_WARN, "[CL_OL_0013] 월마감 대상 없음 ym=%s", ym);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_buf_sets(ctx->out, "YYYYMM", ym);
        tx_buf_setlong(ctx->out, "MONTHCNT", 0);
        tx_buf_sets(ctx->out, "MESSAGE", "월마감 대상(M/U) 없음");
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }

    /* 4. 월마감 트랜잭션 : M/U → S */
    if (tx_begin() != TX_OK) {
        tx_log(TX_LOG_ERROR, "[CL_OL_0013] 트랜잭션 시작 실패");
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    EXEC SQL UPDATE cl_ledger
        SET status = 'S', upd_ts = now()
        WHERE biz_date LIKE :h_pat
          AND status IN ('M', 'U');
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("CL_OL_0013 month update");
        tx_abort();
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    month_cnt = (long)sqlca.sqlerrd[2];

    /* 5. 월 마감금액 합계 재집계 (S) */
    EXEC SQL SELECT coalesce(sum(amount), 0)
        INTO :h_settle_sum
        FROM cl_ledger
        WHERE biz_date LIKE :h_pat
          AND status   = 'S';
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("CL_OL_0013 month sum");
        tx_abort();
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_commit();

    /* 6. 응답 구성 */
    amount_format_won(h_settle_sum, won, sizeof(won));
    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "YYYYMM", ym);
    tx_buf_setlong(ctx->out, "MONTHCNT", month_cnt);
    tx_buf_setlong(ctx->out, "SETTLESUM", h_settle_sum);
    tx_buf_sets(ctx->out, "SETTLEWON", won);
    tx_log(TX_LOG_INFO, "[CL_OL_0013] 월마감 완료 ym=%s 건수=%ld 합계=%ld",
           ym, month_cnt, h_settle_sum);
    tx_return(ctx, TX_OK, ctx->out);
}