// Copyright 2011-2020 David Robillard <d@drobilla.net>
// SPDX-License-Identifier: ISC

#undef NDEBUG

#include "serd/serd.h"

#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

#define USTR(s) ((const uint8_t*)(s))

static void
test_file_uri(const char* hostname,
              const char* path,
              bool        escape,
              const char* expected_uri,
              const char* expected_path)
{
  if (!expected_path) {
    expected_path = path;
  }

  SerdNode node = serd_node_new_file_uri(USTR(path), USTR(hostname), 0, escape);

  uint8_t* out_hostname = NULL;
  uint8_t* out_path     = serd_file_uri_parse(node.buf, &out_hostname);
  assert(!strcmp((const char*)node.buf, expected_uri));
  assert((hostname && out_hostname) || (!hostname && !out_hostname));
  assert(!strcmp((const char*)out_path, (const char*)expected_path));

  serd_free(out_path);
  serd_free(out_hostname);
  serd_node_free(&node);
}

#if defined(__GNUC__)
#  pragma GCC diagnostic push
#  pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif

static void
test_uri_to_path(void)
{
  const uint8_t* uri = (const uint8_t*)"file:///home/user/foo.ttl";
  assert(!strcmp((const char*)serd_uri_to_path(uri), "/home/user/foo.ttl"));

  uri = (const uint8_t*)"file://localhost/home/user/foo.ttl";
  assert(!strcmp((const char*)serd_uri_to_path(uri), "/home/user/foo.ttl"));

  uri = (const uint8_t*)"file:illegal/file/uri";
  assert(!serd_uri_to_path(uri));

  uri = (const uint8_t*)"file:///c:/awful/system";
  assert(!strcmp((const char*)serd_uri_to_path(uri), "c:/awful/system"));

  uri = (const uint8_t*)"file:///c:awful/system";
  assert(!strcmp((const char*)serd_uri_to_path(uri), "/c:awful/system"));

  uri = (const uint8_t*)"file:///0/1";
  assert(!strcmp((const char*)serd_uri_to_path(uri), "/0/1"));

  uri = (const uint8_t*)"C:\\Windows\\Sucks";
  assert(!strcmp((const char*)serd_uri_to_path(uri), "C:\\Windows\\Sucks"));

  uri = (const uint8_t*)"C|/Windows/Sucks";
  assert(!strcmp((const char*)serd_uri_to_path(uri), "C|/Windows/Sucks"));

  uri = (const uint8_t*)"http://example.org/path";
  assert(!serd_uri_to_path(uri));
}

#if defined(__GNUC__)
#  pragma GCC diagnostic pop
#endif

static void
test_uri_parsing(void)
{
  test_file_uri(NULL, "C:/My 100%", true, "file:///C:/My%20100%%", NULL);
  test_file_uri(NULL, "/foo/bar", true, "file:///foo/bar", NULL);
  test_file_uri("bhost", "/foo/bar", true, "file://bhost/foo/bar", NULL);
  test_file_uri(NULL, "a/relative path", false, "a/relative path", NULL);
  test_file_uri(
    NULL, "a/relative <path>", true, "a/relative%20%3Cpath%3E", NULL);

#ifdef _WIN32
  test_file_uri(
    NULL, "C:\\My 100%", true, "file:///C:/My%20100%%", "C:/My 100%");

  test_file_uri(NULL,
                "\\drive\\relative",
                true,
                "file:///drive/relative",
                "/drive/relative");

  test_file_uri(NULL,
                "C:\\Program Files\\Serd",
                true,
                "file:///C:/Program%20Files/Serd",
                "C:/Program Files/Serd");

  test_file_uri("ahost",
                "C:\\Pointless Space",
                true,
                "file://ahost/C:/Pointless%20Space",
                "C:/Pointless Space");
#else
  /* What happens with Windows paths on other platforms is a bit weird, but
     more or less unavoidable.  It doesn't work to interpret backslashes as
     path separators on any other platform. */

  test_file_uri("ahost",
                "C:\\Pointless Space",
                true,
                "file://ahost/C:%5CPointless%20Space",
                "/C:\\Pointless Space");

  test_file_uri(NULL,
                "\\drive\\relative",
                true,
                "%5Cdrive%5Crelative",
                "\\drive\\relative");

  test_file_uri(NULL,
                "C:\\Program Files\\Serd",
                true,
                "file:///C:%5CProgram%20Files%5CSerd",
                "/C:\\Program Files\\Serd");

  test_file_uri("ahost",
                "C:\\Pointless Space",
                true,
                "file://ahost/C:%5CPointless%20Space",
                "/C:\\Pointless Space");
#endif

  // Test tolerance of parsing junk URI escapes

  uint8_t* out_path = serd_file_uri_parse(USTR("file:///foo/%0Xbar"), NULL);
  assert(!strcmp((const char*)out_path, "/foo/bar"));
  serd_free(out_path);
}

static void
test_uri_from_string(void)
{
  SerdNode nonsense = serd_node_new_uri_from_string(NULL, NULL, NULL);
  assert(nonsense.type == SERD_NOTHING);

  SerdURI  base_uri;
  SerdNode base =
    serd_node_new_uri_from_string(USTR("http://example.org/"), NULL, &base_uri);
  SerdNode nil  = serd_node_new_uri_from_string(NULL, &base_uri, NULL);
  SerdNode nil2 = serd_node_new_uri_from_string(USTR(""), &base_uri, NULL);
  assert(nil.type == SERD_URI);
  assert(!strcmp((const char*)nil.buf, (const char*)base.buf));
  assert(nil2.type == SERD_URI);
  assert(!strcmp((const char*)nil2.buf, (const char*)base.buf));
  serd_node_free(&nil);
  serd_node_free(&nil2);

  serd_node_free(&base);
}

static void
test_relative_uri(void)
{
  SerdURI  base_uri;
  SerdNode base =
    serd_node_new_uri_from_string(USTR("http://example.org/"), NULL, &base_uri);

  SerdNode abs =
    serd_node_from_string(SERD_URI, USTR("http://example.org/foo/bar"));
  SerdURI abs_uri;
  serd_uri_parse(abs.buf, &abs_uri);

  SerdURI  rel_uri;
  SerdNode rel =
    serd_node_new_relative_uri(&abs_uri, &base_uri, NULL, &rel_uri);
  assert(!strcmp((const char*)rel.buf, "/foo/bar"));

  SerdNode up = serd_node_new_relative_uri(&base_uri, &abs_uri, NULL, NULL);
  assert(!strcmp((const char*)up.buf, "../"));

  SerdNode noup =
    serd_node_new_relative_uri(&base_uri, &abs_uri, &abs_uri, NULL);
  assert(!strcmp((const char*)noup.buf, "http://example.org/"));

  SerdNode x =
    serd_node_from_string(SERD_URI, USTR("http://example.org/foo/x"));
  SerdURI x_uri;
  serd_uri_parse(x.buf, &x_uri);

  SerdNode x_rel = serd_node_new_relative_uri(&x_uri, &abs_uri, &abs_uri, NULL);
  assert(!strcmp((const char*)x_rel.buf, "x"));

  serd_node_free(&x_rel);
  serd_node_free(&noup);
  serd_node_free(&up);
  serd_node_free(&rel);
  serd_node_free(&base);
}

int
main(void)
{
  test_uri_to_path();
  test_uri_parsing();
  test_uri_from_string();
  test_relative_uri();

  printf("Success\n");
  return 0;
}