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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2013 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS 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 COPYRIGHT HOLDER OR 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.
 */

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

#include <cx/mempool.h>
#include "mimeconf.h"
#include "logging.h"

#define MIMECONFIG_MAX_TOKENS 4096

MimeConfig *load_mime_config(const char *file) {
    FILE *in = fopen(file, "r");
    if(in == NULL) {
        ws_cfg_log(LOG_FAILURE, "Cannot load mime config file %s: %s", file, strerror(errno));
        return NULL;
    }
    
    MimeConfig *conf = malloc(sizeof(MimeConfig));
    conf->parser.parse = mimeconf_parse;
    conf->directives_begin = NULL;
    conf->directives_end = NULL;
    conf->ntypes = 0;
    int r = cfg_parse_basic_file((ConfigParser*)conf, in);
    if(r != 0) {
        ws_cfg_log(LOG_FAILURE, "Cannot parse mime config file %s", file);
        fclose(in);
        free(conf);
        // TODO: free
        return NULL;
    }
    
    fclose(in);

    return conf;
}

void free_mime_config(MimeConfig *conf) {
    cxMempoolDestroy(conf->parser.mp->data); // TODO: is there a better way to access the mempool?
    free(conf);
}

int mimeconf_parse(void *p, ConfigLine *begin, ConfigLine *end, cxmutstr line) {
    MimeConfig *conf = p;
    CxAllocator *mp = conf->parser.mp;
    
    // parse mime directive
    MimeDirective *dir = OBJ_NEW_N(mp, MimeDirective);
    
    ConfigParam *params = cfg_param_list(line, mp);
    for(ConfigParam *param=params;param;param=param->next) { 
        if(!cx_strcmp(cx_strcast(param->name), cx_str("type"))) {
            dir->type = param->value;
        } else if(!cx_strcmp(cx_strcast(param->name), cx_str("exts"))) {
            // comma-separated file extensions
            dir->nextensions = cx_strsplit_a(mp, cx_strcast(param->value), cx_strn(",", 1), MIMECONFIG_MAX_TOKENS, &dir->extensions);
        }
    }
    
    CFG_MIME_ADD(&conf->directives_begin, &conf->directives_end, dir);
    
    conf->ntypes++;

    return 0;
}