// Copyright 2012-2016 David Robillard <d@drobilla.net>
// SPDX-License-Identifier: ISC

#include <lv2/atom/atom.h>
#include <lv2/atom/forge.h>
#include <lv2/atom/util.h>
#include <lv2/midi/midi.h>
#include <lv2/urid/urid.h>
#include <serd/serd.h>
#include <sratom/sratom.h>

#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define NS_RDF "http://www.w3.org/1999/02/22-rdf-syntax-ns#"

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

#if defined(__GNUC__)
#  define SRATOM_LOG_FUNC(fmt, arg1) __attribute__((format(printf, fmt, arg1)))
#else
#  define SRATOM_LOG_FUNC(fmt, arg1)
#endif

/// Simple O(n) URI map
typedef struct {
  char** uris;
  size_t n_uris;
} Uris;

static char*
copy_string(const char* str)
{
  const size_t len = strlen(str);
  char*        dup = (char*)malloc(len + 1);
  memcpy(dup, str, len + 1);
  return dup;
}

static LV2_URID
urid_map(LV2_URID_Map_Handle handle, const char* uri)
{
  Uris* const uris = (Uris*)handle;

  for (size_t i = 0; i < uris->n_uris; ++i) {
    if (!strcmp(uris->uris[i], uri)) {
      return i + 1;
    }
  }

  uris->uris = (char**)realloc(uris->uris, ++uris->n_uris * sizeof(char*));
  uris->uris[uris->n_uris - 1] = copy_string(uri);
  return uris->n_uris;
}

static const char*
urid_unmap(LV2_URID_Unmap_Handle handle, LV2_URID urid)
{
  Uris* const uris = (Uris*)handle;

  if (urid > 0 && urid <= uris->n_uris) {
    return uris->uris[urid - 1];
  }

  return NULL;
}

SRATOM_LOG_FUNC(1, 2) static int
test_fail(const char* fmt, ...)
{
  va_list args; // NOLINT(cppcoreguidelines-init-variables)
  va_start(args, fmt);
  fprintf(stderr, "error: ");
  vfprintf(stderr, fmt, args);
  va_end(args);
  return 1;
}

static int
test(SerdEnv* env, bool top_level, bool pretty_numbers)
{
  Uris           uris  = {NULL, 0};
  LV2_URID_Map   map   = {&uris, urid_map};
  LV2_URID_Unmap unmap = {&uris, urid_unmap};
  LV2_Atom_Forge forge;
  lv2_atom_forge_init(&forge, &map);

  Sratom* sratom = sratom_new(&map);
  sratom_set_env(sratom, env);
  sratom_set_pretty_numbers(sratom, pretty_numbers);
  sratom_set_object_mode(sratom,
                         top_level ? SRATOM_OBJECT_MODE_BLANK_SUBJECT
                                   : SRATOM_OBJECT_MODE_BLANK);

  LV2_URID eg_Object  = urid_map(&uris, "http://example.org/Object");
  LV2_URID eg_one     = urid_map(&uris, "http://example.org/a-one");
  LV2_URID eg_two     = urid_map(&uris, "http://example.org/b-two");
  LV2_URID eg_three   = urid_map(&uris, "http://example.org/c-three");
  LV2_URID eg_four    = urid_map(&uris, "http://example.org/d-four");
  LV2_URID eg_true    = urid_map(&uris, "http://example.org/e-true");
  LV2_URID eg_false   = urid_map(&uris, "http://example.org/f-false");
  LV2_URID eg_path    = urid_map(&uris, "http://example.org/g-path");
  LV2_URID eg_winpath = urid_map(&uris, "http://example.org/h-winpath");
  LV2_URID eg_relpath = urid_map(&uris, "http://example.org/i-relpath");
  LV2_URID eg_urid    = urid_map(&uris, "http://example.org/j-urid");
  LV2_URID eg_string  = urid_map(&uris, "http://example.org/k-string");
  LV2_URID eg_langlit = urid_map(&uris, "http://example.org/l-langlit");
  LV2_URID eg_typelit = urid_map(&uris, "http://example.org/m-typelit");
  LV2_URID eg_null    = urid_map(&uris, "http://example.org/n-null");
  LV2_URID eg_chunk   = urid_map(&uris, "http://example.org/o-chunk");
  LV2_URID eg_blob    = urid_map(&uris, "http://example.org/p-blob");
  LV2_URID eg_blank   = urid_map(&uris, "http://example.org/q-blank");
  LV2_URID eg_tuple   = urid_map(&uris, "http://example.org/r-tuple");
  LV2_URID eg_rectup  = urid_map(&uris, "http://example.org/s-rectup");
  LV2_URID eg_ivector = urid_map(&uris, "http://example.org/t-ivector");
  LV2_URID eg_lvector = urid_map(&uris, "http://example.org/u-lvector");
  LV2_URID eg_fvector = urid_map(&uris, "http://example.org/v-fvector");
  LV2_URID eg_dvector = urid_map(&uris, "http://example.org/w-dvector");
  LV2_URID eg_bvector = urid_map(&uris, "http://example.org/x-bvector");
  LV2_URID eg_fseq    = urid_map(&uris, "http://example.org/y-fseq");
  LV2_URID eg_bseq    = urid_map(&uris, "http://example.org/z-bseq");

  uint8_t buf[1024];
  lv2_atom_forge_set_buffer(&forge, buf, sizeof(buf));

  const char*          obj_uri = "http://example.org/obj";
  LV2_URID             obj_id  = urid_map(&uris, obj_uri);
  LV2_Atom_Forge_Frame obj_frame;
  if (top_level) {
    lv2_atom_forge_object(&forge, &obj_frame, obj_id, eg_Object);
  } else {
    lv2_atom_forge_object(&forge, &obj_frame, 0, eg_Object);
  }

  LV2_Atom* obj = lv2_atom_forge_deref(&forge, obj_frame.ref);

  // eg_one = (Int32)1
  lv2_atom_forge_key(&forge, eg_one);
  lv2_atom_forge_int(&forge, 1);

  // eg_two = (Int64)2
  lv2_atom_forge_key(&forge, eg_two);
  lv2_atom_forge_long(&forge, 2);

  // eg_three = (Float)3.0
  lv2_atom_forge_key(&forge, eg_three);
  lv2_atom_forge_float(&forge, 3.0f);

  // eg_four = (Double)4.0
  lv2_atom_forge_key(&forge, eg_four);
  lv2_atom_forge_double(&forge, 4.0);

  // eg_true = (Bool)1
  lv2_atom_forge_key(&forge, eg_true);
  lv2_atom_forge_bool(&forge, true);

  // eg_false = (Bool)0
  lv2_atom_forge_key(&forge, eg_false);
  lv2_atom_forge_bool(&forge, false);

  // eg_path = (Path)"/absolute/path"
  const char*  pstr     = "/absolute/path";
  const size_t pstr_len = strlen(pstr);
  lv2_atom_forge_key(&forge, eg_path);
  lv2_atom_forge_path(&forge, pstr, pstr_len);

  // eg_winpath = (Path)"C:\Stupid\File System"
  const char*  wpstr     = "C:/Stupid/File System";
  const size_t wpstr_len = strlen(wpstr);
  lv2_atom_forge_key(&forge, eg_winpath);
  lv2_atom_forge_path(&forge, wpstr, wpstr_len);

  // eg_relpath = (Path)"foo/bar"
  const char*  rpstr     = "foo/bar";
  const size_t rpstr_len = strlen(rpstr);
  lv2_atom_forge_key(&forge, eg_relpath);
  lv2_atom_forge_path(&forge, rpstr, rpstr_len);

  // eg_urid = (URID)"http://example.org/value"
  LV2_URID eg_value = urid_map(&uris, "http://example.org/value");
  lv2_atom_forge_key(&forge, eg_urid);
  lv2_atom_forge_urid(&forge, eg_value);

  // eg_string = (String)"hello"
  lv2_atom_forge_key(&forge, eg_string);
  lv2_atom_forge_string(&forge, "hello", strlen("hello"));

  // eg_langlit = (Literal)"ni hao"@cmn (but in actual mandarin)
  const uint8_t ni_hao[] = {0xE4, 0xBD, 0xA0, 0xE5, 0xA5, 0xBD};
  lv2_atom_forge_key(&forge, eg_langlit);
  lv2_atom_forge_literal(&forge,
                         (const char*)ni_hao,
                         6,
                         0,
                         urid_map(&uris, "http://lexvo.org/id/iso639-3/cmn"));

  // eg_typelit = (Literal)"value"^^<http://example.org/Type>
  lv2_atom_forge_key(&forge, eg_typelit);
  lv2_atom_forge_literal(&forge,
                         "value",
                         strlen("value"),
                         urid_map(&uris, "http://example.org/Type"),
                         0);

  // eg_null = null
  lv2_atom_forge_key(&forge, eg_null);
  lv2_atom_forge_atom(&forge, 0, 0);

  // eg_chunk = 0xBEEFDEAD
  uint8_t chunk_buf[] = {0xBE, 0xEF, 0xDE, 0xAD};
  lv2_atom_forge_key(&forge, eg_chunk);
  lv2_atom_forge_atom(&forge, sizeof(chunk_buf), forge.Chunk);
  lv2_atom_forge_write(&forge, chunk_buf, sizeof(chunk_buf));

  // eg_blob = 0xDEADBEEF
  uint32_t blob_type  = map.map(map.handle, "http://example.org/Blob");
  uint8_t  blob_buf[] = {0xDE, 0xAD, 0xBE, 0xEF};
  lv2_atom_forge_key(&forge, eg_blob);
  lv2_atom_forge_atom(&forge, sizeof(blob_buf), blob_type);
  lv2_atom_forge_write(&forge, blob_buf, sizeof(blob_buf));

  // eg_blank = [ a eg:Object ; blank [ a eg:Object] ]
  lv2_atom_forge_key(&forge, eg_blank);
  LV2_Atom_Forge_Frame blank_frame;
  lv2_atom_forge_object(&forge, &blank_frame, 0, eg_Object);
  lv2_atom_forge_key(&forge, eg_blank);
  LV2_Atom_Forge_Frame sub_blank_frame;
  lv2_atom_forge_object(&forge, &sub_blank_frame, 0, eg_Object);
  lv2_atom_forge_pop(&forge, &sub_blank_frame);
  lv2_atom_forge_pop(&forge, &blank_frame);

  // eg_tuple = "foo",true
  lv2_atom_forge_key(&forge, eg_tuple);
  LV2_Atom_Forge_Frame tuple_frame;
  lv2_atom_forge_tuple(&forge, &tuple_frame);
  lv2_atom_forge_string(&forge, "foo", strlen("foo"));
  lv2_atom_forge_bool(&forge, true);
  lv2_atom_forge_pop(&forge, &tuple_frame);

  // eg_rectup = "foo",true,("bar",false)
  lv2_atom_forge_key(&forge, eg_rectup);
  LV2_Atom_Forge_Frame rectup_frame;
  lv2_atom_forge_tuple(&forge, &rectup_frame);
  lv2_atom_forge_string(&forge, "foo", strlen("foo"));
  lv2_atom_forge_bool(&forge, true);
  LV2_Atom_Forge_Frame subrectup_frame;
  lv2_atom_forge_tuple(&forge, &subrectup_frame);
  lv2_atom_forge_string(&forge, "bar", strlen("bar"));
  lv2_atom_forge_bool(&forge, false);
  lv2_atom_forge_pop(&forge, &subrectup_frame);
  lv2_atom_forge_pop(&forge, &rectup_frame);

  // eg_ivector = (Vector<Int>)1,2,3,4,5
  lv2_atom_forge_key(&forge, eg_ivector);
  const int32_t ielems[] = {1, 2, 3, 4, 5};
  lv2_atom_forge_vector(&forge, sizeof(int32_t), forge.Int, 5, ielems);

  // eg_lvector = (Vector<Long>)1,2,3,4
  lv2_atom_forge_key(&forge, eg_lvector);
  const int64_t lelems[] = {1, 2, 3, 4};
  lv2_atom_forge_vector(&forge, sizeof(int64_t), forge.Long, 4, lelems);

  // eg_fvector = (Vector<Float>)1.0,2.0,3.0,4.0,5.0
  lv2_atom_forge_key(&forge, eg_fvector);
  const float felems[] = {1, 2, 3, 4, 5};
  lv2_atom_forge_vector(&forge, sizeof(float), forge.Float, 5, felems);

  // eg_dvector = (Vector<Double>)1.0,2.0,3.0,4.0
  lv2_atom_forge_key(&forge, eg_dvector);
  const double delems[] = {1, 2, 3, 4};
  lv2_atom_forge_vector(&forge, sizeof(double), forge.Double, 4, delems);

  // eg_bvector = (Vector<Bool>)1,0,1
  lv2_atom_forge_key(&forge, eg_bvector);
  const int32_t belems[] = {true, false, true};
  lv2_atom_forge_vector(&forge, sizeof(int32_t), forge.Bool, 3, belems);

  // eg_fseq = (Sequence)1, 2
  LV2_URID midi_midiEvent = map.map(map.handle, LV2_MIDI__MidiEvent);
  lv2_atom_forge_key(&forge, eg_fseq);
  LV2_Atom_Forge_Frame fseq_frame;
  lv2_atom_forge_sequence_head(&forge, &fseq_frame, 0);

  const uint8_t ev1[3] = {0x90, 0x1A, 0x1};
  lv2_atom_forge_frame_time(&forge, 1);
  lv2_atom_forge_atom(&forge, sizeof(ev1), midi_midiEvent);
  lv2_atom_forge_raw(&forge, ev1, sizeof(ev1));
  lv2_atom_forge_pad(&forge, sizeof(ev1));

  const uint8_t ev2[3] = {0x90, 0x2B, 0x2};
  lv2_atom_forge_frame_time(&forge, 3);
  lv2_atom_forge_atom(&forge, sizeof(ev2), midi_midiEvent);
  lv2_atom_forge_raw(&forge, ev2, sizeof(ev2));
  lv2_atom_forge_pad(&forge, sizeof(ev2));

  lv2_atom_forge_pop(&forge, &fseq_frame);

  // eg_bseq = (Sequence)1.1, 2.2
  LV2_URID atom_beatTime = map.map(map.handle, LV2_ATOM__beatTime);
  lv2_atom_forge_key(&forge, eg_bseq);
  LV2_Atom_Forge_Frame bseq_frame;
  lv2_atom_forge_sequence_head(&forge, &bseq_frame, atom_beatTime);

  lv2_atom_forge_beat_time(&forge, 1.0);
  lv2_atom_forge_atom(&forge, sizeof(ev1), midi_midiEvent);
  lv2_atom_forge_raw(&forge, ev1, sizeof(ev1));
  lv2_atom_forge_pad(&forge, sizeof(ev1));

  lv2_atom_forge_beat_time(&forge, 2.0);
  lv2_atom_forge_atom(&forge, sizeof(ev2), midi_midiEvent);
  lv2_atom_forge_raw(&forge, ev2, sizeof(ev2));
  lv2_atom_forge_pad(&forge, sizeof(ev2));

  lv2_atom_forge_pop(&forge, &bseq_frame);

  lv2_atom_forge_pop(&forge, &obj_frame);

  const char* base_uri = "file:///tmp/base/";

  SerdNode s = serd_node_from_string(SERD_URI, USTR("http://example.org/obj"));
  SerdNode p = serd_node_from_string(SERD_URI, USTR(NS_RDF "value"));

  const SerdNode* subj = top_level ? NULL : &s;
  const SerdNode* pred = top_level ? NULL : &p;

  char* outstr = sratom_to_turtle(sratom,
                                  &unmap,
                                  base_uri,
                                  subj,
                                  pred,
                                  obj->type,
                                  obj->size,
                                  LV2_ATOM_BODY(obj));

  printf("# Atom => Turtle\n\n%s", outstr);

  LV2_Atom* parsed = NULL;
  if (top_level) {
    SerdNode o = serd_node_from_string(SERD_URI, (const uint8_t*)obj_uri);
    parsed     = sratom_from_turtle(sratom, base_uri, &o, NULL, outstr);
  } else {
    parsed = sratom_from_turtle(sratom, base_uri, subj, pred, outstr);
  }

  if (!pretty_numbers) {
    if (!lv2_atom_equals(obj, parsed)) {
      return test_fail("Parsed atom does not match original\n");
    }

    char* instr = sratom_to_turtle(sratom,
                                   &unmap,
                                   base_uri,
                                   subj,
                                   pred,
                                   parsed->type,
                                   parsed->size,
                                   LV2_ATOM_BODY(parsed));
    printf("# Turtle => Atom\n\n%s", instr);

    if (!!strcmp(outstr, instr)) {
      return test_fail("Re-serialized string differs from original\n");
    }
    free(instr);
  }

  printf("All tests passed.\n");

  free(parsed);
  free(outstr);
  sratom_free(sratom);
  for (uint32_t i = 0; i < uris.n_uris; ++i) {
    free(uris.uris[i]);
  }

  free(uris.uris);

  return 0;
}

static int
test_env(SerdEnv* env)
{
  if (test(env, false, false) || //
      test(env, true, false) ||  //
      test(env, false, true) ||  //
      test(env, true, true)) {
    return 1;
  }

  return 0;
}

int
main(void)
{
  // Test with no environment
  if (test_env(NULL)) {
    return 1;
  }

  // Test with a prefix defined
  SerdEnv* env = serd_env_new(NULL);
  serd_env_set_prefix_from_strings(
    env, (const uint8_t*)"eg", (const uint8_t*)"http://example.org/");

  test_env(env);
  serd_env_free(env);

  return 0;
}