/*
  Copyright 2007-2019 David Robillard <d@drobilla.net>

  Permission to use, copy, modify, and/or 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 THE AUTHOR DISCLAIMS ALL WARRANTIES
  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include "filesystem.h"
#include "lilv_internal.h"

#include "lilv/lilv.h"
#include "serd/serd.h"

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

LILV_API
LilvNode*
lilv_new_uri(LilvWorld* world, const char* uri)
{
  (void)world;
  return serd_new_uri(NULL, serd_string(uri));
}

LilvNode*
lilv_new_file_uri(LilvWorld* world, const char* host, const char* path)
{
  (void)world;

  char*     abs_path = lilv_path_absolute(path);
  SerdNode* s =
    serd_new_file_uri(NULL,
                      serd_string(abs_path),
                      host ? serd_string(host) : serd_empty_string());

  free(abs_path);
  return s;
}

LilvNode*
lilv_new_string(LilvWorld* world, const char* str)
{
  (void)world;

  return serd_new_string(NULL, serd_string(str));
}

LilvNode*
lilv_new_int(LilvWorld* world, int val)
{
  (void)world;

  return serd_new_value(NULL, serd_int(val));
}

LilvNode*
lilv_new_float(LilvWorld* world, float val)
{
  (void)world;

  return serd_new_value(NULL, serd_float(val));
}

LilvNode*
lilv_new_bool(LilvWorld* world, bool val)
{
  (void)world;

  return serd_new_value(NULL, serd_bool(val));
}

LilvNode*
lilv_node_duplicate(const LilvNode* val)
{
  return serd_node_copy(NULL, val);
}

void
lilv_node_free(LilvNode* val)
{
  serd_node_free(NULL, val);
}

bool
lilv_node_equals(const LilvNode* value, const LilvNode* other)
{
  return serd_node_equals(value, other);
}

char*
lilv_node_get_turtle_token(const LilvNode* value)
{
  const char* str    = serd_node_string(value);
  size_t      len    = 0;
  char*       result = NULL;

  if (lilv_node_is_uri(value)) {
    len    = strlen(str) + 3;
    result = (char*)calloc(len, 1);
    snprintf(result, len, "<%s>", str);
  } else if (lilv_node_is_blank(value)) {
    len    = strlen(str) + 3;
    result = (char*)calloc(len, 1);
    snprintf(result, len, "_:%s", str);
  } else {
    result = lilv_strdup(str);
  }

  return result;
}

bool
lilv_node_is_uri(const LilvNode* value)
{
  return value && serd_node_type(value) == SERD_URI;
}

const char*
lilv_node_as_uri(const LilvNode* value)
{
  return (lilv_node_is_uri(value) ? serd_node_string(value) : NULL);
}

bool
lilv_node_is_blank(const LilvNode* value)
{
  return value && serd_node_type(value) == SERD_BLANK;
}

const char*
lilv_node_as_blank(const LilvNode* value)
{
  return (lilv_node_is_blank(value) ? serd_node_string(value) : NULL);
}

bool
lilv_node_is_literal(const LilvNode* value)
{
  return value && serd_node_type(value) == SERD_LITERAL;
}

bool
lilv_node_is_string(const LilvNode* value)
{
  return value &&
         (serd_node_type(value) == SERD_LITERAL && !serd_node_datatype(value));
}

const char*
lilv_node_as_string(const LilvNode* value)
{
  return value ? serd_node_string(value) : NULL;
}

bool
lilv_node_is_int(const LilvNode* value)
{
  if (!value) {
    return false;
  }

  const SerdNode* const datatype = serd_node_datatype(value);
  return (serd_node_type(value) == SERD_LITERAL && datatype &&
          (!strcmp(serd_node_string(datatype), LILV_NS_XSD "integer") ||
           !strcmp(serd_node_string(datatype), LILV_NS_XSD "int")));
}

int
lilv_node_as_int(const LilvNode* value)
{
  return lilv_node_is_int(value) ? strtoll(serd_node_string(value), NULL, 10)
                                 : 0;
}

bool
lilv_node_is_float(const LilvNode* value)
{
  if (!value) {
    return false;
  }

  const SerdNode* const datatype = serd_node_datatype(value);
  return (serd_node_type(value) == SERD_LITERAL && datatype &&
          (!strcmp(serd_node_string(datatype), LILV_NS_XSD "decimal") ||
           !strcmp(serd_node_string(datatype), LILV_NS_XSD "float") ||
           !strcmp(serd_node_string(datatype), LILV_NS_XSD "double")));
}

float
lilv_node_as_float(const LilvNode* value)
{
  const SerdValue result = serd_get_value_as(value, SERD_FLOAT, true);

  return result.type == SERD_FLOAT ? result.data.as_float : NAN;
}

bool
lilv_node_is_bool(const LilvNode* value)
{
  if (!value) {
    return false;
  }

  const SerdNode* const datatype = serd_node_datatype(value);
  return (serd_node_type(value) == SERD_LITERAL && datatype &&
          (!strcmp(serd_node_string(datatype), LILV_NS_XSD "boolean")));
}

bool
lilv_node_as_bool(const LilvNode* value)
{
  return (lilv_node_is_bool(value) && !strcmp(serd_node_string(value), "true"));
}

char*
lilv_node_get_path(const LilvNode* value, char** hostname)
{
  return lilv_node_is_uri(value)
           ? serd_parse_file_uri(NULL, lilv_node_as_uri(value), hostname)
           : NULL;
}