/* @tier easy @module mg @transform msg-gateway-online */
/*
 * mg_ol_0016.pgc - 전문게이트웨이 전문 통계 서비스 (MG_OL_0016)  [tier=easy]
 *
 * 요청 영업일(BIZDATE)에 대해 상태별 처리건수(접수/완료/실패)와 총거래
 * 금액을 mg 표준 DBIO(mg_rec_count/mg_rec_sum)로 집계하고, 완료율과
 * 평균거래금액 파생지표까지 계산해 통계전문을 구성한다.
 */
#include <stdio.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(MG_OL_0016, ctx)
{
    char bizdate[16];
    char wonbuf[32];
    long cnt_recv, cnt_done, cnt_fail, cnt_total;
    long sum_amt = 0;
    long avg_amt = 0;
    int  done_rate = 0;

    tx_log(TX_LOG_INFO, "[MG_OL_0016] 전문 통계 서비스 진입");

    if (tx_buf_get(ctx->in, "BIZDATE", bizdate, sizeof(bizdate)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[MG_OL_0016] BIZDATE 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (!date_is_valid(bizdate)) {
        tx_log(TX_LOG_WARN, "[MG_OL_0016] 영업일 형식 오류 date=%s", bizdate);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    /* 상태별 건수 집계 (음수 = 조회오류 → 0 보정) */
    cnt_recv = mg_rec_count(bizdate, MG_ST_RECV);
    cnt_done = mg_rec_count(bizdate, MG_ST_DONE);
    cnt_fail = mg_rec_count(bizdate, MG_ST_FAIL);
    if (cnt_recv < 0) cnt_recv = 0;
    if (cnt_done < 0) cnt_done = 0;
    if (cnt_fail < 0) cnt_fail = 0;
    cnt_total = cnt_recv + cnt_done + cnt_fail;

    /* 총 거래금액 집계 */
    if (mg_rec_sum(bizdate, &sum_amt) != TX_OK) {
        tx_log(TX_LOG_WARN, "[MG_OL_0016] 금액합계 조회 실패 date=%s", bizdate);
        sum_amt = 0;
    }

    /* 파생지표: 완료율(%) 과 평균거래금액 */
    if (cnt_total > 0) {
        done_rate = (int)((cnt_done * 100) / cnt_total);
        avg_amt   = sum_amt / cnt_total;
    }

    amount_format_won(sum_amt, wonbuf, sizeof(wonbuf));

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "BIZDATE", bizdate);
    tx_buf_setlong(ctx->out, "CNTRECV", cnt_recv);
    tx_buf_setlong(ctx->out, "CNTDONE", cnt_done);
    tx_buf_setlong(ctx->out, "CNTFAIL", cnt_fail);
    tx_buf_setlong(ctx->out, "CNTTOTAL", cnt_total);
    tx_buf_setlong(ctx->out, "SUMAMT", sum_amt);
    tx_buf_setlong(ctx->out, "AVGAMT", avg_amt);
    tx_buf_setlong(ctx->out, "DONERATE", (long)done_rate);
    tx_buf_sets(ctx->out, "SUMWON", wonbuf);

    /* 정산완료 건수/최대 거래금액은 원장(mg_ledger)에서 직접 임베디드 SQL 집계 */
    {
        EXEC SQL BEGIN DECLARE SECTION;
        char h_stat_bd[9];
        long h_cnt_settled;
        long h_max_amt;
        EXEC SQL END DECLARE SECTION;

        strncpy(h_stat_bd, bizdate, sizeof(h_stat_bd) - 1);
        h_stat_bd[sizeof(h_stat_bd) - 1] = '\0';
        h_cnt_settled = 0;
        h_max_amt     = 0;

        EXEC SQL SELECT COUNT(*), COALESCE(MAX(amount), 0)
            INTO :h_cnt_settled, :h_max_amt
            FROM mg_ledger
            WHERE biz_date = :h_stat_bd
              AND status   = 'S';
        if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
            TX_DBIO_LOG_ERR("SELECT mg_ledger settled stat");
            h_cnt_settled = 0;
            h_max_amt     = 0;
        }
        tx_buf_setlong(ctx->out, "CNTSETTLED", h_cnt_settled);
        tx_buf_setlong(ctx->out, "MAXAMT", h_max_amt);
    }

    tx_log(TX_LOG_INFO, "[MG_OL_0016] 통계완료 date=%s total=%ld sum=%ld rate=%d%%",
           bizdate, cnt_total, sum_amt, done_rate);
    tx_return(ctx, TX_OK, ctx->out);
}