/* @tier medium @module mm @transform master-online */
/*
 * mm_ol_0029.pgc - 정산주기 변경 서비스 (MM_OL_0029)  [tier=medium]
 *
 * 정산주기코드(D=일, W=주, M=월)의 유효성을 코드 마스터(mm_settle_cycle_code)
 * 로 확인한 뒤 mm_merchant.settle_cycle 을 UPDATE 하고, 정산주기 변경이력
 * (mm_settle_hist)에 이전주기/신규주기/변경자 행을 남긴다. (CRUD + 이력)
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(MM_OL_0029, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_merch_id[16];
    char h_new_cycle[2];
    char h_old_cycle[2];
    char h_oper[16];
    char h_chg_date[9];
    long h_valid;
    EXEC SQL END DECLARE SECTION;

    char merch_id[16];
    char new_cycle[2];
    char oper[16];

    tx_log(TX_LOG_INFO, "[MM_OL_0029] 정산주기 변경 서비스 진입");

    if (tx_buf_get(ctx->in, "MERCHID", merch_id, sizeof(merch_id)) != TX_OK ||
        tx_buf_get(ctx->in, "CYCLE",   new_cycle, sizeof(new_cycle)) != TX_OK ||
        tx_buf_get(ctx->in, "OPER",    oper,      sizeof(oper))      != TX_OK) {
        tx_log(TX_LOG_ERROR, "[MM_OL_0029] 필수 필드 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "MM2900");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    strncpy(h_merch_id, merch_id, sizeof(h_merch_id) - 1);
    h_merch_id[sizeof(h_merch_id) - 1] = '\0';
    strncpy(h_new_cycle, new_cycle, sizeof(h_new_cycle) - 1);
    h_new_cycle[sizeof(h_new_cycle) - 1] = '\0';
    strncpy(h_oper, oper, sizeof(h_oper) - 1);
    h_oper[sizeof(h_oper) - 1] = '\0';
    date_today(h_chg_date);

    /* 1) 정산주기코드 유효성 확인 */
    EXEC SQL SELECT COUNT(*) INTO :h_valid
          FROM mm_settle_cycle_code
         WHERE cycle_cd = :h_new_cycle
           AND use_yn = 'Y';

    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT mm_settle_cycle_code");
        tx_buf_sets(ctx->out, "ERRCODE", "MM2909");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (h_valid <= 0) {
        tx_log(TX_LOG_WARN, "[MM_OL_0029] 유효하지 않은 정산주기 cycle=%s", new_cycle);
        tx_buf_sets(ctx->out, "ERRCODE", "MM2901");
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    /* 2) 현재 정산주기 조회 (존재 확인 + 이력 이전값) */
    EXEC SQL SELECT settle_cycle INTO :h_old_cycle
          FROM mm_merchant
         WHERE merch_id = :h_merch_id;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[MM_OL_0029] 가맹점 없음 merch=%s", merch_id);
        tx_buf_sets(ctx->out, "ERRCODE", RESP_NOMERCH);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT mm_merchant settle_cycle");
        tx_buf_sets(ctx->out, "ERRCODE", "MM2909");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (strcmp(h_old_cycle, h_new_cycle) == 0) {
        tx_log(TX_LOG_WARN, "[MM_OL_0029] 정산주기 변동 없음 merch=%s cycle=%s",
               merch_id, new_cycle);
        tx_buf_sets(ctx->out, "ERRCODE", "MM2902");
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    /* 3) 트랜잭션: UPDATE + 이력 INSERT */
    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[MM_OL_0029] tx_begin 경고");

    EXEC SQL UPDATE mm_merchant
           SET settle_cycle = :h_new_cycle,
               upd_date = :h_chg_date
         WHERE merch_id = :h_merch_id;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("UPDATE mm_merchant settle_cycle");
        tx_abort();
        tx_buf_sets(ctx->out, "ERRCODE", "MM2903");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    EXEC SQL INSERT INTO mm_settle_hist
               (merch_id, old_cycle, new_cycle, chg_date, oper)
        VALUES (:h_merch_id, :h_old_cycle, :h_new_cycle, :h_chg_date, :h_oper);

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("INSERT mm_settle_hist");
        tx_abort();
        tx_buf_sets(ctx->out, "ERRCODE", "MM2904");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_commit();

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "MERCHID", merch_id);
    tx_buf_sets(ctx->out, "OLDCYCLE", h_old_cycle);
    tx_buf_sets(ctx->out, "NEWCYCLE", h_new_cycle);
    tx_buf_sets(ctx->out, "CHGDATE", h_chg_date);
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[MM_OL_0029] 정산주기 변경완료 merch=%s %s->%s",
           merch_id, h_old_cycle, h_new_cycle);
    tx_return(ctx, TX_OK, ctx->out);
}
