/* @tier medium @module ac @transform acquire-online */
/*
 * ac_ol_0013.pgc - 매입 온라인 서비스 (AC_OL_0013)  [tier=medium]
 *
 * 선매입(정산일 이전 조기매입): 접수 상태(R) 원장만 조기매입 대상으로
 * 인정한다. 거래일 다음 영업일을 조기 정산목표일로 계산해 상태를
 * 처리완료(M)로 전환하고 정산목표일을 원장에 반영한다.
 */
#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_0013, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    char h_bizdate[9];
    char h_status[2];
    char h_new_status[2];
    char h_settle[9];
    EXEC SQL END DECLARE SECTION;

    char key[16];
    char bizdate[9];
    char status[2];
    char settle[9];

    tx_log(TX_LOG_INFO, "[AC_OL_0013] 선매입(조기매입) 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0013] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

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

    EXEC SQL SELECT biz_date, status
        INTO :h_bizdate, :h_status
        FROM ac_ledger
        WHERE key = :h_key;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0013] 원장 없음 key=%s", key);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("AC_OL_0013 ac_ledger select");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    strncpy(bizdate, h_bizdate, sizeof(bizdate) - 1);
    bizdate[sizeof(bizdate) - 1] = '\0';
    strncpy(status, h_status, sizeof(status) - 1);
    status[sizeof(status) - 1] = '\0';

    if (strcmp(status, AC_ST_RECV) != 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0013] 조기매입 불가 상태 key=%s status=%s", key, status);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_buf_setlong(ctx->out, "ADVANCED", 0);
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    /* 조기 정산목표일 = 거래일의 다음 영업일 */
    if (date_next_business(bizdate, settle) != 0) {
        strncpy(settle, bizdate, sizeof(settle) - 1);
        settle[sizeof(settle) - 1] = '\0';
    }

    strncpy(h_new_status, AC_ST_DONE, sizeof(h_new_status) - 1);
    h_new_status[sizeof(h_new_status) - 1] = '\0';
    strncpy(h_settle, settle, sizeof(h_settle) - 1);
    h_settle[sizeof(h_settle) - 1] = '\0';

    /* 낙관적 갱신: 조회 시점과 동일한 상태(R)일 때만 전환한다 */
    EXEC SQL UPDATE ac_ledger
        SET status = :h_new_status, settle_date = :h_settle, upd_ts = now()
        WHERE key = :h_key AND status = :h_status;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("AC_OL_0013 ac_ledger update");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (sqlca.sqlerrd[2] == 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0013] 동시성 충돌로 전환 실패 key=%s", key);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_buf_setlong(ctx->out, "ADVANCED", 0);
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    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, "ADVANCED", 1);
    tx_buf_sets(ctx->out, "SETTLEDATE", settle);
    tx_log(TX_LOG_INFO, "[AC_OL_0013] 조기매입 완료 key=%s settle=%s", key, settle);
    tx_return(ctx, TX_OK, ctx->out);
}
