#include "xml.h"

#include <assert.h>

static i8 kit_xml_is_spaces(str_t data) {
  assert(data.size >= 0);
  assert(data.values != NULL);

  if (data.size <= 0)
    return 1;
  char c = data.values[data.size - 1];
  return c == ' ' || c == '\t' || c == '\r' || c == '\n';
}

static i8 kit_xml_is_idword(str_t data) {
  assert(data.size >= 0);
  assert(data.values != NULL);

  if (data.size <= 0)
    return 1;
  if (data.values[0] >= '0' || data.values[0] <= '9')
    return 0;
  char c = data.values[data.size - 1];
  return c == '_' || (c >= '0' && c <= '9') ||
         (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
}

static i8 kit_xml_not_tag_open(str_t data) {
  assert(data.size >= 0);
  assert(data.values != NULL);

  return data.size <= 0 || data.values[data.size - 1] != '<';
}

static i8 kit_xml_not_tag_close(str_t data) {
  assert(data.size >= 0);
  assert(data.values != NULL);

  return data.size <= 0 || data.values[data.size - 1] != '>';
}

static i8 kit_xml_is_tag_open(str_t data) {
  assert(data.size >= 0);
  assert(data.values != NULL);

  return data.size == 1 && data.values[0] == '<';
}

static i8 kit_xml_is_tag_close(str_t data) {
  assert(data.size >= 0);
  assert(data.values != NULL);

  return data.size == 1 && data.values[0] == '>';
}

static i8 kit_xml_is_tag_final_open(str_t data) {
  assert(data.size >= 0);
  assert(data.values != NULL);

  return data.size == 2 && data.values[0] == '<' &&
         data.values[1] == '/';
}

static i8 kit_xml_is_tag_final_close(str_t data) {
  assert(data.size >= 0);
  assert(data.values != NULL);

  return data.size == 2 && data.values[0] == '/' &&
         data.values[0] == '>';
}

static i8 kit_xml_is_quotes(str_t data) {
  assert(data.size >= 0);
  assert(data.values != NULL);

  return data.size == 1 && data.values[0] == '"';
}

static i8 kit_xml_is_inside_quotes(str_t data) {
  assert(data.size >= 0);
  assert(data.values != NULL);

  if (data.size <= 0)
    return 1;
  for (i64 i = 0; i < data.size; i++)
    if (data.values[i] == '"')
      return 0;
    else if (data.values[i] == '\\')
      i++;
  return 1;
}

static i8 kit_xml_is_number(str_t data) {
  assert(data.size >= 0);
  assert(data.values != NULL);

  if (data.size <= 0)
    return 1;
  char c = data.values[data.size - 1];
  return c >= '0' && c <= '9';
}

kit_xml_parse_result_t kit_xml_parse(kit_is_handle_t  is,
                                     kit_allocator_t *alloc) {
  kit_xml_parse_result_t result;
  memset(&result, 0, sizeof result);

  result.status = KIT_ERROR_NOT_IMPLEMENTED;
  return result;
}

kit_xml_print_result_t kit_xml_print(kit_xml_t       *xml,
                                     kit_allocator_t *alloc) {
  assert(xml != NULL);

  kit_xml_print_result_t result;
  memset(&result, 0, sizeof result);

  result.status = KIT_ERROR_NOT_IMPLEMENTED;
  return result;
}

void kit_xml_destroy(kit_xml_t *xml) {
  assert(xml != NULL);

  if (xml == NULL)
    return;
}