/********************************************************************\
 * gnc-vendor-xml-v2.c -- vendor xml i/o implementation         *
 *                                                                  *
 * Copyright (C) 2002 Derek Atkins <warlord@MIT.EDU>                *
 *                                                                  *
 * This program is free software; you can redistribute it and/or    *
 * modify it under the terms of the GNU General Public License as   *
 * published by the Free Software Foundation; either version 2 of   *
 * the License, or (at your option) any later version.              *
 *                                                                  *
 * This program is distributed in the hope that it will be useful,  *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of   *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the    *
 * GNU General Public License for more details.                     *
 *                                                                  *
 * You should have received a copy of the GNU General Public License*
 * along with this program; if not, contact:                        *
 *                                                                  *
 * Free Software Foundation           Voice:  +1-617-542-5942       *
 * 51 Franklin Street, Fifth Floor    Fax:    +1-617-542-2652       *
 * Boston, MA  02110-1301,  USA       gnu@gnu.org                   *
 *                                                                  *
\********************************************************************/
#include <glib.h>

#include <config.h>
#include <stdlib.h>
#include <string.h>
#include "gncBillTermP.h"
#include "gncVendorP.h"
#include "gncTaxTableP.h"

#include "gnc-xml-helper.h"
#include "sixtp.h"
#include "sixtp-utils.h"
#include "sixtp-parsers.h"
#include "sixtp-utils.h"
#include "sixtp-dom-parsers.h"
#include "sixtp-dom-generators.h"

#include "gnc-xml.h"
#include "io-gncxml-gen.h"
#include "io-gncxml-v2.h"

#include "gnc-vendor-xml-v2.h"
#include "gnc-address-xml-v2.h"
#include "xml-helpers.h"
#include "gnc-bill-term-xml-v2.h"

#define _GNC_MOD_NAME   GNC_ID_VENDOR

static QofLogModule log_module = GNC_MOD_IO;

const gchar* vendor_version_string = "2.0.0";

/* ids */
#define gnc_vendor_string "gnc:GncVendor"
#define vendor_name_string "vendor:name"
#define vendor_guid_string "vendor:guid"
#define vendor_id_string "vendor:id"
#define vendor_addr_string "vendor:addr"
#define vendor_notes_string "vendor:notes"
#define vendor_terms_string "vendor:terms"
#define vendor_taxincluded_string "vendor:taxincluded"
#define vendor_active_string "vendor:active"
#define vendor_currency_string "vendor:currency"
#define vendor_taxtable_string "vendor:taxtable"
#define vendor_taxtableoverride_string "vendor:use-tt"
#define vendor_slots_string "vendor:slots"

static xmlNodePtr
vendor_dom_tree_create (GncVendor* vendor)
{
    xmlNodePtr ret;
    GncBillTerm* term;
    GncTaxTable* taxtable;

    ret = xmlNewNode (NULL, BAD_CAST gnc_vendor_string);
    xmlSetProp (ret, BAD_CAST "version", BAD_CAST vendor_version_string);

    xmlAddChild (ret, guid_to_dom_tree (vendor_guid_string,
                                        qof_instance_get_guid (QOF_INSTANCE (vendor))));

    xmlAddChild (ret, text_to_dom_tree (vendor_name_string,
                                        gncVendorGetName (vendor)));

    xmlAddChild (ret, text_to_dom_tree (vendor_id_string,
                                        gncVendorGetID (vendor)));

    xmlAddChild (ret, gnc_address_to_dom_tree (vendor_addr_string,
                                               gncVendorGetAddr (vendor)));

    maybe_add_string (ret, vendor_notes_string, gncVendorGetNotes (vendor));

    term = gncVendorGetTerms (vendor);
    if (term)
        xmlAddChild (ret, guid_to_dom_tree (vendor_terms_string,
                                            qof_instance_get_guid (QOF_INSTANCE (term))));

    xmlAddChild (ret, text_to_dom_tree (vendor_taxincluded_string,
                                        gncTaxIncludedTypeToString (
                                            gncVendorGetTaxIncluded (vendor))));

    xmlAddChild (ret, int_to_dom_tree (vendor_active_string,
                                       gncVendorGetActive (vendor)));

    xmlAddChild
    (ret,
     commodity_ref_to_dom_tree (vendor_currency_string,
                                gncVendorGetCurrency (vendor)));

    xmlAddChild (ret, int_to_dom_tree (vendor_taxtableoverride_string,
                                       gncVendorGetTaxTableOverride (vendor)));
    taxtable = gncVendorGetTaxTable (vendor);
    if (taxtable)
        xmlAddChild (ret, guid_to_dom_tree (vendor_taxtable_string,
                                            qof_instance_get_guid (QOF_INSTANCE (taxtable))));

    /* xmlAddChild won't do anything with a NULL, so tests are superfluous. */
    xmlAddChild (ret, qof_instance_slots_to_dom_tree (vendor_slots_string,
                                                      QOF_INSTANCE (vendor)));
    return ret;
}

/***********************************************************************/

struct vendor_pdata
{
    GncVendor* vendor;
    QofBook* book;
};

static gboolean
set_string (xmlNodePtr node, GncVendor* vendor,
            void (*func) (GncVendor* vendor, const char* txt))
{
    char* txt = dom_tree_to_text (node);
    g_return_val_if_fail (txt, FALSE);

    func (vendor, txt);

    g_free (txt);

    return TRUE;
}

static gboolean
set_boolean (xmlNodePtr node, GncVendor* vendor,
             void (*func) (GncVendor* vendor, gboolean b))
{
    gint64 val;
    gboolean ret;

    ret = dom_tree_to_integer (node, &val);
    if (ret)
        func (vendor, (gboolean)val);

    return ret;
}

static gboolean
vendor_name_handler (xmlNodePtr node, gpointer vendor_pdata)
{
    struct vendor_pdata* pdata = static_cast<decltype (pdata)> (vendor_pdata);

    return set_string (node, pdata->vendor, gncVendorSetName);
}

static gboolean
vendor_guid_handler (xmlNodePtr node, gpointer vendor_pdata)
{
    struct vendor_pdata* pdata = static_cast<decltype (pdata)> (vendor_pdata);
    GncGUID* guid;
    GncVendor* vendor;

    guid = dom_tree_to_guid (node);
    g_return_val_if_fail (guid, FALSE);
    vendor = gncVendorLookup (pdata->book, guid);
    if (vendor)
    {
        gncVendorDestroy (pdata->vendor);
        pdata->vendor = vendor;
        gncVendorBeginEdit (vendor);
    }
    else
    {
        gncVendorSetGUID (pdata->vendor, guid);
    }

    guid_free (guid);

    return TRUE;
}

static gboolean
vendor_id_handler (xmlNodePtr node, gpointer vendor_pdata)
{
    struct vendor_pdata* pdata = static_cast<decltype (pdata)> (vendor_pdata);

    return set_string (node, pdata->vendor, gncVendorSetID);
}

static gboolean
vendor_notes_handler (xmlNodePtr node, gpointer vendor_pdata)
{
    struct vendor_pdata* pdata = static_cast<decltype (pdata)> (vendor_pdata);

    return set_string (node, pdata->vendor, gncVendorSetNotes);
}

static gboolean
vendor_terms_handler (xmlNodePtr node, gpointer vendor_pdata)
{
    struct vendor_pdata* pdata = static_cast<decltype (pdata)> (vendor_pdata);
    GncGUID* guid;
    GncBillTerm* term;

    guid = dom_tree_to_guid (node);
    g_return_val_if_fail (guid, FALSE);
    term = gnc_billterm_xml_find_or_create (pdata->book, guid);
    g_assert (term);
    guid_free (guid);
    gncVendorSetTerms (pdata->vendor, term);

    return TRUE;
}

static gboolean
vendor_addr_handler (xmlNodePtr node, gpointer vendor_pdata)
{
    struct vendor_pdata* pdata = static_cast<decltype (pdata)> (vendor_pdata);

    return gnc_dom_tree_to_address (node, gncVendorGetAddr (pdata->vendor));
}

static gboolean
vendor_taxincluded_handler (xmlNodePtr node, gpointer vendor_pdata)
{
    struct vendor_pdata* pdata = static_cast<decltype (pdata)> (vendor_pdata);
    GncTaxIncluded type;
    char* str;
    gboolean ret;

    str = dom_tree_to_text (node);
    g_return_val_if_fail (str, FALSE);

    ret = gncTaxIncludedStringToType (str, &type);
    g_free (str);

    if (ret)
        gncVendorSetTaxIncluded (pdata->vendor, type);

    return ret;
}

static gboolean
vendor_active_handler (xmlNodePtr node, gpointer vendor_pdata)
{
    struct vendor_pdata* pdata = static_cast<decltype (pdata)> (vendor_pdata);
    return set_boolean (node, pdata->vendor, gncVendorSetActive);
}

static gboolean
vendor_currency_handler (xmlNodePtr node, gpointer vendor_pdata)
{
    struct vendor_pdata* pdata = static_cast<decltype (pdata)> (vendor_pdata);
    gnc_commodity* com;

    com = dom_tree_to_commodity_ref (node, pdata->book);
    g_return_val_if_fail (com, FALSE);

    gncVendorSetCurrency (pdata->vendor, com);

    return TRUE;
}

static gboolean
vendor_taxtable_handler (xmlNodePtr node, gpointer vendor_pdata)
{
    struct vendor_pdata* pdata = static_cast<decltype (pdata)> (vendor_pdata);
    GncGUID* guid;
    GncTaxTable* taxtable;

    guid = dom_tree_to_guid (node);
    g_return_val_if_fail (guid, FALSE);
    taxtable = gncTaxTableLookup (pdata->book, guid);
    if (!taxtable)
    {
        taxtable = gncTaxTableCreate (pdata->book);
        gncTaxTableBeginEdit (taxtable);
        gncTaxTableSetGUID (taxtable, guid);
        gncTaxTableCommitEdit (taxtable);
    }
    else
        gncTaxTableDecRef (taxtable);

    gncVendorSetTaxTable (pdata->vendor, taxtable);
    guid_free (guid);
    return TRUE;
}

static gboolean
vendor_taxtableoverride_handler (xmlNodePtr node, gpointer vendor_pdata)
{
    struct vendor_pdata* pdata = static_cast<decltype (pdata)> (vendor_pdata);
    return set_boolean (node, pdata->vendor, gncVendorSetTaxTableOverride);
}

static gboolean
vendor_slots_handler (xmlNodePtr node, gpointer vendor_pdata)
{
    struct vendor_pdata* pdata = static_cast<decltype (pdata)> (vendor_pdata);
    return dom_tree_create_instance_slots (node, QOF_INSTANCE (pdata->vendor));

}

static struct dom_tree_handler vendor_handlers_v2[] =
{
    { vendor_name_string, vendor_name_handler, 1, 0 },
    { vendor_guid_string, vendor_guid_handler, 1, 0 },
    { vendor_id_string, vendor_id_handler, 1, 0 },
    { vendor_addr_string, vendor_addr_handler, 1, 0 },
    { vendor_notes_string, vendor_notes_handler, 0, 0 },
    { vendor_terms_string, vendor_terms_handler, 0, 0 },
    { vendor_taxincluded_string, vendor_taxincluded_handler, 1, 0 },
    { vendor_active_string, vendor_active_handler, 1, 0 },
    { vendor_currency_string, vendor_currency_handler, 0, 0 }, /* XXX */
    { "vendor:commodity", vendor_currency_handler, 0, 0 }, /* XXX */
    { vendor_taxtable_string, vendor_taxtable_handler, 0, 0 },
    { vendor_taxtableoverride_string, vendor_taxtableoverride_handler, 0, 0 },
    { vendor_slots_string, vendor_slots_handler, 0, 0 },
    { NULL, 0, 0, 0 }
};

static GncVendor*
dom_tree_to_vendor (xmlNodePtr node, QofBook* book)
{
    struct vendor_pdata vendor_pdata;
    gboolean successful;

    vendor_pdata.vendor = gncVendorCreate (book);
    vendor_pdata.book = book;
    gncVendorBeginEdit (vendor_pdata.vendor);

    successful = dom_tree_generic_parse (node, vendor_handlers_v2,
                                         &vendor_pdata);

    if (successful)
        gncVendorCommitEdit (vendor_pdata.vendor);
    else
    {
        PERR ("failed to parse vendor tree");
        gncVendorDestroy (vendor_pdata.vendor);
        vendor_pdata.vendor = NULL;
    }

    return vendor_pdata.vendor;
}

static gboolean
gnc_vendor_end_handler (gpointer data_for_children,
                        GSList* data_from_children, GSList* sibling_data,
                        gpointer parent_data, gpointer global_data,
                        gpointer* result, const gchar* tag)
{
    GncVendor* vendor;
    xmlNodePtr tree = (xmlNodePtr)data_for_children;
    gxpf_data* gdata = (gxpf_data*)global_data;
    QofBook* book = static_cast<decltype (book)> (gdata->bookdata);

    if (parent_data)
    {
        return TRUE;
    }

    /* OK.  For some messed up reason this is getting called again with a
       NULL tag.  So we ignore those cases */
    if (!tag)
    {
        return TRUE;
    }

    g_return_val_if_fail (tree, FALSE);

    vendor = dom_tree_to_vendor (tree, book);
    if (vendor != NULL)
    {
        gdata->cb (tag, gdata->parsedata, vendor);
    }

    xmlFreeNode (tree);

    return vendor != NULL;
}

static sixtp*
vendor_sixtp_parser_create (void)
{
    return sixtp_dom_parser_new (gnc_vendor_end_handler, NULL, NULL);
}

static gboolean
vendor_should_be_saved (GncVendor* vendor)
{
    const char* id;

    /* make sure this is a valid vendor before we save it -- should have an ID */
    id = gncVendorGetID (vendor);
    if (id == NULL || *id == '\0')
        return FALSE;

    return TRUE;
}

static void
do_count (QofInstance* vendor_p, gpointer count_p)
{
    int* count = static_cast<decltype (count)> (count_p);
    if (vendor_should_be_saved ((GncVendor*)vendor_p))
        (*count)++;
}

static int
vendor_get_count (QofBook* book)
{
    int count = 0;
    qof_object_foreach (_GNC_MOD_NAME, book, do_count, (gpointer) &count);
    return count;
}

static void
xml_add_vendor (QofInstance* vendor_p, gpointer out_p)
{
    xmlNodePtr node;
    GncVendor* vendor = (GncVendor*) vendor_p;
    FILE* out = static_cast<decltype (out)> (out_p);

    if (ferror (out))
        return;
    if (!vendor_should_be_saved (vendor))
        return;

    node = vendor_dom_tree_create (vendor);
    xmlElemDump (out, NULL, node);
    xmlFreeNode (node);
    if (ferror (out) || fprintf (out, "\n") < 0)
        return;
}

static gboolean
vendor_write (FILE* out, QofBook* book)
{
    qof_object_foreach_sorted (_GNC_MOD_NAME, book, xml_add_vendor,
                               (gpointer) out);
    return ferror (out) == 0;
}

static gboolean
vendor_ns (FILE* out)
{
    g_return_val_if_fail (out, FALSE);
    return gnc_xml2_write_namespace_decl (out, "vendor");
}

void
gnc_vendor_xml_initialize (void)
{
    static GncXmlDataType_t be_data =
    {
        GNC_FILE_BACKEND_VERS,
        gnc_vendor_string,
        vendor_sixtp_parser_create,
        NULL,           /* add_item */
        vendor_get_count,
        vendor_write,
        NULL,           /* scrub */
        vendor_ns,
    };

    gnc_xml_register_backend(be_data);
}