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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Jeffrey Stedfast <fejj@ximian.com>
 *
 *  Copyright 2001 Ximian, Inc. (www.ximian.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 */

#include <config.h>

#include "camel-exception.h"
#include "camel-vtrash-folder.h"
#include "camel-store.h"
#include "camel-vee-store.h"
#include "camel-mime-message.h"

#include <string.h>

/* Returns the class for a CamelFolder */
#define CF_CLASS(so) ((CamelFolderClass *)((CamelObject *)(so))->klass)

static struct {
    const char *name;
    const char *expr;
    guint32 bit;
    guint32 flags;
} vdata[] = {
    { CAMEL_VTRASH_NAME, "(match-all (system-flag \"Deleted\"))", CAMEL_MESSAGE_DELETED, CAMEL_FOLDER_IS_TRASH },
    { CAMEL_VJUNK_NAME, "(match-all (system-flag \"Junk\"))", CAMEL_MESSAGE_JUNK, CAMEL_FOLDER_IS_JUNK },
};

static CamelVeeFolderClass *camel_vtrash_folder_parent;

static void vtrash_append_message (CamelFolder *folder, CamelMimeMessage *message,
                   const CamelMessageInfo *info, char **appended_uid,
                   CamelException *ex);
static void vtrash_transfer_messages_to (CamelFolder *folder, GPtrArray *uids,
                     CamelFolder *dest, GPtrArray **transferred_uids,
                     gboolean delete_originals, CamelException *ex);

static void
camel_vtrash_folder_class_init (CamelVTrashFolderClass *klass)
{
    CamelFolderClass *folder_class = (CamelFolderClass *) klass;
    
    camel_vtrash_folder_parent = CAMEL_VEE_FOLDER_CLASS(camel_vee_folder_get_type());
    
    folder_class->append_message = vtrash_append_message;
    folder_class->transfer_messages_to = vtrash_transfer_messages_to;
}

static void
camel_vtrash_folder_init (CamelVTrashFolder *vtrash)
{
    /*CamelFolder *folder = CAMEL_FOLDER (vtrash);*/
}

CamelType
camel_vtrash_folder_get_type (void)
{
    static CamelType type = CAMEL_INVALID_TYPE;
    
    if (type == CAMEL_INVALID_TYPE) {
        type = camel_type_register (camel_vee_folder_get_type (),
                        "CamelVTrashFolder",
                        sizeof (CamelVTrashFolder),
                        sizeof (CamelVTrashFolderClass),
                        (CamelObjectClassInitFunc) camel_vtrash_folder_class_init,
                        NULL,
                        (CamelObjectInitFunc) camel_vtrash_folder_init,
                        NULL);
    }
    
    return type;
}

/**
 * camel_vtrash_folder_new:
 * @parent_store: the parent CamelVeeStore
 * @type: type of vfolder, CAMEL_VTRASH_FOLDER_TRASH or CAMEL_VTRASH_FOLDER_JUNK currently.
 * @ex: a CamelException
 *
 * Create a new CamelVeeFolder object.
 *
 * Return value: A new CamelVeeFolder widget.
 **/
CamelFolder *
camel_vtrash_folder_new (CamelStore *parent_store, enum _camel_vtrash_folder_t type)
{
    CamelVTrashFolder *vtrash;
    
    g_assert(type < CAMEL_VTRASH_FOLDER_LAST);

    vtrash = (CamelVTrashFolder *)camel_object_new(camel_vtrash_folder_get_type());
    camel_vee_folder_construct(CAMEL_VEE_FOLDER (vtrash), parent_store, vdata[type].name,
                   CAMEL_STORE_FOLDER_PRIVATE|CAMEL_STORE_FOLDER_CREATE|CAMEL_STORE_VEE_FOLDER_AUTO);

    ((CamelFolder *)vtrash)->folder_flags |= vdata[type].flags;
    camel_vee_folder_set_expression((CamelVeeFolder *)vtrash, vdata[type].expr);
    vtrash->bit = vdata[type].bit;

    return (CamelFolder *)vtrash;
}

static void
vtrash_append_message (CamelFolder *folder, CamelMimeMessage *message,
               const CamelMessageInfo *info, char **appended_uid,
               CamelException *ex)
{
    /* no-op */
}

struct _transfer_data {
    CamelFolder *folder;
    CamelFolder *dest;
    GPtrArray *uids;
    gboolean delete;
};

static void
transfer_messages(CamelFolder *folder, struct _transfer_data *md, CamelException *ex)
{
    int i;

    if (!camel_exception_is_set (ex))
        camel_folder_transfer_messages_to(md->folder, md->uids, md->dest, NULL, md->delete, ex);

    for (i=0;i<md->uids->len;i++)
        g_free(md->uids->pdata[i]);
    g_ptr_array_free(md->uids, TRUE);
    camel_object_unref((CamelObject *)md->folder);
    g_free(md);
}

static void
vtrash_transfer_messages_to (CamelFolder *source, GPtrArray *uids,
                 CamelFolder *dest, GPtrArray **transferred_uids,
                 gboolean delete_originals, CamelException *ex)
{
    CamelVeeMessageInfo *mi;
    int i;
    GHashTable *batch = NULL;
    const char *tuid;
    struct _transfer_data *md;
    guint32 sbit = ((CamelVTrashFolder *)source)->bit;

    /* This is a special case of transfer_messages_to: Either the
     * source or the destination is a vtrash folder (but not both
     * since a store should never have more than one).
     */

    if (transferred_uids)
        *transferred_uids = NULL;

    if (CAMEL_IS_VTRASH_FOLDER (dest)) {
        /* Copy to trash is meaningless. */
        if (!delete_originals)
            return;

        /* Move to trash is the same as setting the message flag */
        for (i = 0; i < uids->len; i++)
            camel_folder_set_message_flags(source, uids->pdata[i], sbit, ~0);
        return;
    }

    /* Moving/Copying from the trash to the original folder = undelete.
     * Moving/Copying from the trash to a different folder = move/copy.
     *
     * Need to check this uid by uid, but we batch up the copies.
     */

    for (i = 0; i < uids->len; i++) {
        mi = (CamelVeeMessageInfo *)camel_folder_get_message_info (source, uids->pdata[i]);
        if (mi == NULL) {
            g_warning ("Cannot find uid %s in source folder during transfer", (char *) uids->pdata[i]);
            continue;
        }
        
        if (dest == mi->folder) {
            /* Just unset the flag on the original message */
            camel_folder_set_message_flags (source, uids->pdata[i], sbit, 0);
        } else {
            if (batch == NULL)
                batch = g_hash_table_new(NULL, NULL);
            md = g_hash_table_lookup(batch, mi->folder);
            if (md == NULL) {
                md = g_malloc0(sizeof(*md));
                md->folder = mi->folder;
                camel_object_ref((CamelObject *)md->folder);
                md->uids = g_ptr_array_new();
                md->dest = dest;
                g_hash_table_insert(batch, mi->folder, md);
            }

            tuid = uids->pdata[i];
            if (strlen(tuid)>8)
                tuid += 8;
            g_ptr_array_add(md->uids, g_strdup(tuid));
        }
        camel_folder_free_message_info (source, (CamelMessageInfo *)mi);
    }

    if (batch) {
        g_hash_table_foreach(batch, (GHFunc)transfer_messages, ex);
        g_hash_table_destroy(batch);
    }
}