/*
Copyright Contributors to the libdnf project.

This file is part of libdnf: https://github.com/rpm-software-management/libdnf/

Libdnf is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 of the License, or
(at your option) any later version.

Libdnf 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with libdnf.  If not, see <https://www.gnu.org/licenses/>.
*/

#include "libdnf5/defs.h"
#include "libdnf5/utils/bgettext/bgettext-common.h"

#include <string.h>

enum { BGETTEXT_PLURAL = 1 << 0, BGETTEXT_CONTEXT = 1 << 1, BGETTEXT_DOMAIN = 1 << 2 };

LIBDNF_API const char * b_dpgettext(const char * domain, const char * context, const char * msgId) {
    size_t context_len = strlen(context) + 1;
    size_t msgId_len = strlen(msgId) + 1;
    char ctxMsgId[context_len + msgId_len];

    memcpy(ctxMsgId, context, context_len - 1);
    ctxMsgId[context_len - 1] = '\004';
    memcpy(ctxMsgId + context_len, msgId, msgId_len);

    const char * const translation = dgettext(domain, ctxMsgId);

    if (translation == ctxMsgId)
        return msgId;

    return translation;
}

LIBDNF_API const char * b_dpgettext2(const char * domain, const char * ctxMsgId, size_t msgIdOffset) {
    const char * const translation = dgettext(domain, ctxMsgId);
    if (translation == ctxMsgId)
        return ctxMsgId + msgIdOffset;
    return translation;
}

LIBDNF_API const char * b_dnpgettext(
    const char * domain, const char * context, const char * msgId, const char * msgIdPlural, unsigned long int n) {
    size_t context_len = strlen(context) + 1;
    size_t msgId_len = strlen(msgId) + 1;
    char ctxMsgId[context_len + msgId_len];

    memcpy(ctxMsgId, context, context_len - 1);
    ctxMsgId[context_len - 1] = '\004';
    memcpy(ctxMsgId + context_len, msgId, msgId_len);

    const char * const translation = dngettext(domain, ctxMsgId, msgIdPlural, n);

    if (translation == ctxMsgId)
        return msgId;

    return translation;
}

LIBDNF_API const char * b_dnpgettext2(
    const char * domain, const char * ctxMsgId, size_t msgIdOffset, const char * msgIdPlural, unsigned long int n) {
    const char * const translation = dngettext(domain, ctxMsgId, msgIdPlural, n);
    if (translation == ctxMsgId)
        return ctxMsgId + msgIdOffset;
    return translation;
}

LIBDNF_API const char * b_gettextmsg_get_domain(struct BgettextMessage message) {
    return *message.bgettextMsg & BGETTEXT_DOMAIN ? message.bgettextMsg + 1 : NULL;
}

LIBDNF_API const char * b_gettextmsg_get_id(struct BgettextMessage message) {
    const char * msgId = message.bgettextMsg + 1;
    if (*message.bgettextMsg & BGETTEXT_DOMAIN) {
        msgId = strchr(msgId, 0) + 1;
    }
    if (*message.bgettextMsg & BGETTEXT_CONTEXT) {
        msgId = strchr(msgId, 0x04) + 1;
    }
    return msgId;
}

LIBDNF_API const char * b_gettextmsg_get_plural_id(struct BgettextMessage message) {
    if (!(*message.bgettextMsg & BGETTEXT_PLURAL)) {
        return NULL;
    }
    const char * msgId = message.bgettextMsg + 1;
    if (*message.bgettextMsg & BGETTEXT_DOMAIN) {
        msgId = strchr(msgId, 0) + 1;
    }
    msgId = strchr(msgId, 0) + 1;  // skip message id
    return msgId;
}

LIBDNF_API const char * b_dmgettext(const char * domain, struct BgettextMessage message, unsigned long int n) {
    const char * markedMsg = message.bgettextMsg;
    if ((*markedMsg & ~(BGETTEXT_PLURAL | BGETTEXT_CONTEXT | BGETTEXT_DOMAIN)) == 0) {
        const char * msgId;
        if (*markedMsg & BGETTEXT_DOMAIN) {
            domain = markedMsg + 1;
            msgId = strchr(domain, 0) + 1;
        } else {
            msgId = markedMsg + 1;
        }
        if (*markedMsg & BGETTEXT_PLURAL) {
            const char * const msgIdPlural = strchr(msgId, 0) + 1;
            const char * const translation = dngettext(domain, msgId, msgIdPlural, n);
            if ((*markedMsg & BGETTEXT_CONTEXT) && n == 1 && translation == msgId)
                return strchr(msgId, 4) + 1;
            return translation;
        } else {
            const char * const translation = dgettext(domain, msgId);
            if ((*markedMsg & BGETTEXT_CONTEXT) && (translation == msgId))
                return strchr(msgId, 4) + 1;
            return translation;
        }
    }
    return markedMsg;
}
