/*  OSSP rc - Run-command processor
**  Copyright (c) 2002 Ralf S. Engelschall
**  Copyright (c) 2002 Cable & Wireless Deutschland GmbH
**  Copyright (c) 2002 The OSSP Project <http://www.ossp.org/>
**
**  This file is part of OSSP rc, a portable Run-command processor
**  which can be found at http://www.ossp.org/pkg/lib/rc/
**
**  Permission to use, copy, modify, and distribute this software for
**  any purpose with or without fee is hereby granted, provided that
**  the above copyright notice and this permission notice appear in all
**  copies.
**
**  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
**  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
**  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
**  IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
**  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
**  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
**  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
**  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
**  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
**  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
**  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
**  SUCH DAMAGE.
**
**  rc_cliopt.c: Run-command processor ISO C source file
*/

#include <stdlib.h>
#include <string.h>

#include "rc.h"
#include "rc_const.h"
#include "rc_config.h"
#include "popt.h"                              /* OSSP popt options library   */

static char        *m_pszOptuples[RC_NUMOPTS]; /* Option name value tuples    */
static char        *m_szRcfile  = NULL;        /* rc file name                */
static char        **m_pszSecs  = NULL;        /* Section names               */
static popt_context m_Optcon;                  /* Context for parsing options */

static struct popt_option m_pOptable[] = {
    /* Long options with short keys but no arguments */
    {RC_USE_NAME, '?', POPT_ARG_NONE, 0, RC_USE_VAL, RC_USE_DESC, NULL},
    {RC_DBG_NAME, 'd', POPT_ARG_NONE, 0, RC_DBG_VAL, RC_DBG_DESC, NULL},
    {RC_VER_NAME, 'V', POPT_ARG_NONE, 0, RC_VER_VAL, RC_VER_DESC, NULL},
    {RC_EVL_NAME, 'e', POPT_ARG_NONE, 0, RC_EVL_VAL, RC_EVL_DESC, NULL},
    {RC_HLP_NAME, 'h', POPT_ARG_NONE, 0, RC_HLP_VAL, RC_HLP_DESC, NULL},
    {RC_INF_NAME, 'i', POPT_ARG_NONE, 0, RC_INF_VAL, RC_INF_DESC, NULL},
    {RC_LBL_NAME, 'l', POPT_ARG_NONE, 0, RC_LBL_VAL, RC_LBL_DESC, NULL},
    {RC_PRN_NAME, 'p', POPT_ARG_NONE, 0, RC_PRN_VAL, RC_PRN_DESC, NULL},
    {RC_SIL_NAME, 's', POPT_ARG_NONE, 0, RC_SIL_VAL, RC_SIL_DESC, NULL},
    {RC_RAW_NAME, 'r', POPT_ARG_NONE, 0, RC_RAW_VAL, RC_RAW_DESC, NULL},
    {RC_VRB_NAME, 'v', POPT_ARG_NONE, 0, RC_VRB_VAL, RC_VRB_DESC, NULL},
    {RC_EXC_NAME, 'x', POPT_ARG_NONE, 0, RC_EXC_VAL, RC_EXC_DESC, NULL},
                                          
    /* Single argument long options with short keys */
    {RC_LOC_NAME, 'L', POPT_ARG_STRING, 0, RC_LOC_VAL, RC_LOC_DESC, "regx"},
    {RC_CNF_NAME, 'c', POPT_ARG_STRING, 0, RC_CNF_VAL, RC_CNF_DESC, "path"},
    {RC_FNC_NAME, 'f', POPT_ARG_STRING, 0, RC_FNC_VAL, RC_FNC_DESC, "path"},
    {RC_QRY_NAME, 'q', POPT_ARG_STRING, 0, RC_QRY_VAL, RC_QRY_DESC, "varx"},
    {RC_TMP_NAME, 't', POPT_ARG_STRING, 0, RC_TMP_VAL, RC_TMP_DESC, "path"},

    /* Single argument long options without short keys */
    {RC_OWN_NAME, 0, POPT_ARG_STRING, 0, RC_OWN_VAL, RC_OWN_DESC, "user"},
    {RC_GRP_NAME, 0, POPT_ARG_STRING, 0, RC_GRP_VAL, RC_GRP_DESC, "group"},
    {RC_MSK_NAME, 0, POPT_ARG_INT,    0, RC_MSK_VAL, RC_MSK_DESC, "umask"},
    {RC_ASS_NAME, 0, POPT_ARG_STRING, 0, RC_ASS_VAL, RC_ASS_DESC, "regx"},
    {RC_DEF_NAME, 0, POPT_ARG_STRING, 0, RC_DEF_VAL, RC_DEF_DESC, "regx"},
    {RC_REF_NAME, 0, POPT_ARG_STRING, 0, RC_REF_VAL, RC_REF_DESC, "regx"},
    {RC_PRM_NAME, 0, POPT_ARG_STRING, 0, RC_PRM_VAL, RC_PRM_DESC, "regx"},
    {RC_TRM_NAME, 0, POPT_ARG_STRING, 0, RC_TRM_VAL, RC_TRM_DESC, "regx"},
    {RC_NCF_NAME, 0, POPT_ARG_STRING, 0, RC_NCF_VAL, RC_NCF_DESC, "name"},
    {RC_CMN_NAME, 0, POPT_ARG_STRING, 0, RC_CMN_VAL, RC_CMN_DESC, "name"},
    {RC_DFL_NAME, 0, POPT_ARG_STRING, 0, RC_DFL_VAL, RC_DFL_DESC, "name"},
    {RC_ERR_NAME, 0, POPT_ARG_STRING, 0, RC_ERR_VAL, RC_ERR_DESC, "name"},

    /* Special stuff    */
    POPT_AUTOHELP
    {NULL, 0, 0, NULL, 0}
};


/***************************************
* clioptNew(void)                      *
* Construct a command line option      *
***************************************/
rc_return_t clioptNew(void)
{
/*    assert(s_pBintab == NULL); */           /* Error if constructed already */
/*    s_pBintab = malloc(sizeof(*s_pBintab));*/ /* Allocate a cliopt instance   */
/*    if (!s_pBintab)
        return(RC_THROW(RC_ERR_MEM));

    s_pBintab->pOptlist = malloc(sizeof(*s_pBintab->pOptlist));*/
/*FIXME    optNew((rc_opt_t **)&s_pBintab->pOptlist->pvData);FIXME*/
/*    s_pBintab->pOptlist->pvData = NULL;
    s_pBintab->pOptlist->pvNext = NULL;*/

    memset(m_pszOptuples, NULL, sizeof(m_pszOptuples));

    return(RC_THROW(RC_OK));
}

/***************************************
* clioptPrintusage()                   *
* Print usage to command line stderr   *
***************************************/
rc_return_t clioptPrintusage(void)
{
    popt_printusage(m_Optcon, stderr, 0);

    return(RC_THROW(RC_OK));
}

/***************************************
* clioptGetXXX()                       *
* clioptSetXXX()                       *
* Command line option accessors        *
***************************************/
const char *clioptGetval(rc_opt_t Optname)
{
    if (!(Optname < RC_NUMOPTS))    /* Validate option range    */
        RC_THROW(RC_ERR_USE);

    return((const char *)m_pszOptuples[Optname]);
}

const char *clioptGetrcfile(void)
{
    if (!m_szRcfile)
        RC_THROW(RC_ERR_USE);

    return((const char *)m_szRcfile);
}

const char **clioptGetsecs(void)
{
    if (!m_pszSecs)
        RC_THROW(RC_ERR_USE);

    return((const char **)m_pszSecs);
}

rc_return_t clioptSetval(rc_opt_t Optname, const char *kszOptval)
{
    if (!(Optname < RC_NUMOPTS))    /* Validate option range    */
        return(RC_THROW(RC_ERR_USE));
    if (!(kszOptval))               /* Validate string value    */
        return(RC_THROW(RC_ERR_USE));

    if (!(m_pszOptuples[Optname] = strdup(kszOptval)))
        return(RC_THROW(RC_ERR_MEM));
    return(RC_THROW(RC_OK));
}

rc_return_t clioptSetrcfile(const char *kszRc)
{
    if (m_szRcfile)                     /* Warn on overwrites */
        RC_THROW(RC_WRN_OWR);
    if (kszRc)
        m_szRcfile = strdup(kszRc);
    else
        return(RC_THROW(RC_ERR_USE));   /* Incoming string is NULL? */

    return(RC_THROW(RC_OK));
}

rc_return_t clioptSetsecs(const char **pkszSecs)
{
    int nSecs  = 0;
    int nIndex = 0;

    if (m_pszSecs)                                  /* Warn on overwrites */
        RC_THROW(RC_WRN_OWR);
    if (pkszSecs) {
        for (nSecs = 0; pkszSecs[nSecs]; nSecs++);  /* Count the sections */
        m_pszSecs = malloc(sizeof (char **) * nSecs + 1);

        for (nIndex = 0; pkszSecs[nIndex]; nIndex++) {
            m_pszSecs[nIndex] = malloc(strlen(pkszSecs[nIndex]));
            memcpy(m_pszSecs[nIndex], pkszSecs[nIndex],\
                   strlen(pkszSecs[nIndex]));
        }
        m_pszSecs[nIndex] = NULL; /* Used later to find the end of the array */
    }
    else
        return(RC_THROW(RC_ERR_USE));   /* Incoming sections are NULL? */

    return(RC_THROW(RC_OK));
}

/***************************************
* clioptProcess(int)                   *
* Switch through available options     *
* processing the corresponding option  *
* and update option table accordingly  *
***************************************/
rc_return_t clioptProcess(int cliOption, const char *kszArg)
{
    switch (cliOption) {
    /* Begin concrete (digital) options */
        case RC_USE_VAL:
            clioptSetval(cliOption, "1"); break;   /* Usage    */
        case RC_DBG_VAL:
            clioptSetval(cliOption, "1"); break;   /* Debug    */
        case RC_VER_VAL:
            clioptSetval(cliOption, "1"); break;   /* Version  */
        case RC_EVL_VAL:                                   
            clioptSetval(cliOption, "1"); break;   /* Eval     */
        case RC_HLP_VAL:                                   
            clioptSetval(cliOption, "1"); break;   /* Help     */
        case RC_INF_VAL:                                   
            clioptSetval(cliOption, "1"); break;   /* Info     */
        case RC_LBL_VAL:                                   
            clioptSetval(cliOption, "1"); break;   /* Label    */
        case RC_PRN_VAL:                                   
            clioptSetval(cliOption, "1"); break;   /* Print    */
        case RC_SIL_VAL:                                   
            clioptSetval(cliOption, "1"); break;   /* Silent   */
        case RC_RAW_VAL:                                   
            clioptSetval(cliOption, "1"); break;   /* Raw      */
        case RC_VRB_VAL:                                   
            clioptSetval(cliOption, "1"); break;   /* Verbose  */
        case RC_EXC_VAL:                                   
            clioptSetval(cliOption, "1"); break;   /* Exec     */

    /* Begin abstract (nondigital) options */
        case RC_LOC_VAL:
            clioptSetval(cliOption, kszArg); break; /* Locations   */
        case RC_CNF_VAL:
            clioptSetval(cliOption, kszArg); break; /* Conf file   */
        case RC_FNC_VAL:
            clioptSetval(cliOption, kszArg); break; /* Func file   */
        case RC_QRY_VAL:
            clioptSetval(cliOption, kszArg); break; /* Format      */
        case RC_TMP_VAL:
            clioptSetval(cliOption, kszArg); break; /* Temp dir    */
        case RC_OWN_VAL:
            clioptSetval(cliOption, kszArg); break; /* User name   */
        case RC_GRP_VAL:
            clioptSetval(cliOption, kszArg); break; /* Group name  */
        case RC_MSK_VAL:
            clioptSetval(cliOption, kszArg); break; /* Umask       */

        case RC_ASS_VAL:
            clioptSetval(cliOption, kszArg); break; /* Assignregex */
        case RC_DEF_VAL:
            clioptSetval(cliOption, kszArg); break; /* Labelregex  */
        case RC_REF_VAL:
            clioptSetval(cliOption, kszArg); break; /* Refregex    */
        case RC_PRM_VAL:
            clioptSetval(cliOption, kszArg); break; /* Paramregex  */
        case RC_TRM_VAL:
            clioptSetval(cliOption, kszArg); break; /* Termregex   */

        case RC_NCF_VAL:
            clioptSetval(cliOption, kszArg); break; /* Configname  */
        case RC_CMN_VAL:
            clioptSetval(cliOption, kszArg); break; /* Commonname  */
        case RC_DFL_VAL:
            clioptSetval(cliOption, kszArg); break; /* Defaultname */
        case RC_ERR_VAL:
            clioptSetval(cliOption, kszArg); break; /* Errorname   */
        default : break;
    }

    return(RC_THROW(RC_OK));
}

/***************************************
* clioptParseopts(int, const char **)  *
* Parse command line options           *
***************************************/
rc_return_t clioptParseopts(int nArgs, const char *szVector[])
{
    ex_t Except;
    char cliOpt = 0;    /* For argument parsing */

    m_Optcon = popt_getcontext(NULL, nArgs, szVector, m_pOptable, 0);
    popt_setotheroptionhelp(m_Optcon, "<rcfile> <sections [args]>");

    if (nArgs < 2) { /* Allow the user to enter just one option, -h z.B. */
        fprintf(stderr, RC_LST_TEXT);
        popt_printusage(m_Optcon, stderr, 0);
        return(RC_THROW(RC_ERR_USE));
    }

    /* Now do options processing */
    while ((cliOpt = popt_getnextopt(m_Optcon)) >= 0) {/* Loop, each time     */
        ex_try {                                       /* eating a new option */
            clioptProcess(cliOpt, popt_getoptarg(m_Optcon));
        }
        ex_catch(Except) { /* Error condition probably deserves attention */
            rethrow;
        }
    }

    if (cliOpt < -1) {
        /* An error occurred during option processing */
        fprintf(stderr, "%s: %s\n",
                popt_badoption(m_Optcon, POPT_BADOPTION_NOALIAS),
                popt_strerror(cliOpt));
        return(RC_THROW(RC_ERR_INT));
    }

    return(RC_THROW(RC_OK));
}

/******************************************
* clioptParseargs(void)                   *
* Parse command line rc file and sections *
******************************************/
rc_return_t clioptParseargs(void)
{
    ex_t Except;

    /* Use popt as a transport to read the user specified rcfile and sections */
    ex_try {
        clioptSetrcfile(popt_getarg(m_Optcon));
        clioptSetsecs(popt_getargs(m_Optcon));
    }
    ex_catch(Except) {
        rethrow; /* Our generic response */
    }

    return(RC_THROW(RC_OK));
}

/***************************************
* clioptDelete(void)                   *
* Destruct a command line option       *
***************************************/
rc_return_t clioptDelete(void)
{
    int i = 0;
/*    ex_t Except;

    assert(s_pBintab);*/                /* Error if not constructed */
/*    ex_try {
        clioptRemall();*/             /* Removes ALL list nodes   */
/*FIXME        optDelete((rc_opt_t **)&s_pBintab->pOptlist->pvData);FIXME*/
/*        free(s_pBintab->pOptlist);*/    /* Deallocate option list   */
/*        free(s_pBintab);*/              /* Deallocate cliopt and    */
/*        s_pBintab = NULL;*/             /* clear its reference      */
/*    }
    ex_catch(Except) {
        rethrow;
    }*/

    popt_freecontext(m_Optcon);         /* Free the popt context      */
    for (i = 0; i < RC_NUMOPTS; i++) {  /* Free the tuples themselves */
        if (m_pszOptuples[i]) {
            free(m_pszOptuples[i]);
            m_pszOptuples[i] = NULL;
        }
    }

    if (m_szRcfile)                     /* Free the rc file arg       */
        free(m_szRcfile);
    if (m_pszSecs) {                    /* Free the section name arg  */
        for (i = 0; m_pszSecs[i]; i++) {
            free(m_pszSecs[i]);
            m_pszSecs[i] = NULL;
        }
        free(m_pszSecs);
    }

/* FIXME BEGIN DEBUG */
for (i = 0; i < RC_NUMOPTS; i++)
    if (m_pszOptuples[i])
        TRACE("Problem! Destructor failed!\n");
/* FIXME END DEBUG */

    return(RC_THROW(RC_OK));
}