#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <Eina.h>
#include <string.h>
#include <assert.h>

#include "Eolian.h"
#include "eo_generator.h"
#include "docs_generator.h"
#include "common_funcs.h"

static _eolian_class_vars class_env;
/* Used to store the function names that will have to be appended
 * with __eolian during C generation. Needed when params have to
 * be initialized and for future features. */
static Eina_Hash *_funcs_params_init = NULL;

static const char
tmpl_eo_ops_desc[] = "\
static const Eo_Op_Description _@#class_op_desc[] = {@#list_op\n};\n\n";

static const char
tmpl_events_desc[] = "\
static const Eo_Event_Description *_@#class_event_desc[] = {@#list_evdesc\n\
     NULL\n\
};\n\n";

static const char
tmpl_eo_src[] = "\
@#functions_body\
\n\
@#ctor_func\
@#dtor_func\
@#ops_desc\
@#events_desc\
static const Eo_Class_Description _@#class_class_desc = {\n\
     EO_VERSION,\n\
     \"@#Class\",\n\
     @#type_class,\n\
     @#eo_class_desc_ops,\n\
     @#Events_Desc,\n\
     @#SizeOfData,\n\
     @#ctor_name,\n\
     @#dtor_name\n\
};\n\
\n\
EO_DEFINE_CLASS(@#klasstype_get, &_@#class_class_desc, @#list_inheritNULL);\
";

static const char
tmpl_eo_obj_header[] = "\
#define @#CLASS_@#CLASSTYPE @#klasstype_get()\n\
\n\
EWAPI const Eo_Class *@#klasstype_get(void);\n\
\n\
";

static Eina_Bool
eo_fundef_generate(const Eolian_Class *class, const Eolian_Function *func, Eolian_Function_Type ftype, Eina_Strbuf *functext)
{
   _eolian_class_func_vars func_env;
   Eina_Iterator *itr;
   void *data, *data2;
   Eina_Bool var_as_ret = EINA_FALSE;
   const Eolian_Type *rettypet = NULL;
   const char *rettype = NULL;
   Eolian_Object_Scope scope = eolian_function_scope_get(func);
   Eina_Bool is_prop = (ftype == EOLIAN_PROP_GET || ftype == EOLIAN_PROP_SET);

   _class_func_env_create(class, eolian_function_name_get(func), ftype, &func_env);
   rettypet = eolian_function_return_type_get(func, ftype);
   if (ftype == EOLIAN_PROP_GET && !rettypet)
     {
        itr = eolian_property_values_get(func, ftype);
        /* We want to check if there is only one parameter */
        if (eina_iterator_next(itr, &data) && !eina_iterator_next(itr, &data2))
          {
             rettypet = eolian_parameter_type_get((Eolian_Function_Parameter*)data);
             var_as_ret = EINA_TRUE;
          }
        eina_iterator_free(itr);
     }
   Eina_Strbuf *str_func = eina_strbuf_new();
   if (eolian_function_is_beta(func))
      eina_strbuf_append_printf(str_func, "#ifdef %s_BETA\n", class_env.upper_classname);
   if (scope == EOLIAN_SCOPE_PROTECTED)
      eina_strbuf_append_printf(str_func, "#ifdef %s_PROTECTED\n", class_env.upper_classname);

   Eina_Bool hasnewdocs = eolian_function_documentation_get(func, EOLIAN_UNRESOLVED) ||
                          eolian_function_documentation_get(func, ftype);
   if (hasnewdocs)
     {
        Eina_Strbuf *dbuf = docs_generate_function(func, ftype, 0, EINA_FALSE);
        eina_strbuf_append(str_func, eina_strbuf_string_get(dbuf));
        eina_strbuf_append_char(str_func, '\n');
        eina_strbuf_free(dbuf);
     }
   eina_strbuf_append_printf(str_func, "EOAPI @#rettype@#retspace%s(%sEo *obj@#full_params);\n",
                             func_env.lower_eo_func,
                             (ftype == EOLIAN_PROP_GET ||
                              eolian_function_object_is_const(func) ||
                              eolian_function_is_class(func))?"const ":"");

   if (scope == EOLIAN_SCOPE_PROTECTED)
      eina_strbuf_append_printf(str_func, "#endif\n");
   if (eolian_function_is_beta(func))
      eina_strbuf_append_printf(str_func, "#endif\n");
   eina_strbuf_append_printf(str_func, "\n");

   Eina_Strbuf *str_par = eina_strbuf_new();

   itr = eolian_property_keys_get(func, ftype);
   EINA_ITERATOR_FOREACH(itr, data)
     {
        Eolian_Function_Parameter *param = data;
        const Eolian_Type *ptypet = eolian_parameter_type_get(param);
        const char *pname = eolian_parameter_name_get(param);
        const char *ptype = eolian_type_c_type_get(ptypet);
        eina_strbuf_append_printf(str_par, ", %s %s", ptype, pname);
        eina_stringshare_del(ptype);
     }
   eina_iterator_free(itr);

   if (!var_as_ret)
     {
        itr = is_prop ? eolian_property_values_get(func, ftype) : eolian_function_parameters_get(func);
        EINA_ITERATOR_FOREACH(itr, data)
          {
             Eolian_Function_Parameter *param = data;
             const Eolian_Type *ptypet = eolian_parameter_type_get(param);
             const char *pname = eolian_parameter_name_get(param);
             const char *ptype = eolian_type_c_type_get(ptypet);
             Eina_Bool add_star = EINA_FALSE;
             Eolian_Parameter_Dir pdir = eolian_parameter_direction_get(param);

             if (ftype == EOLIAN_PROP_GET) {
                  add_star = EINA_TRUE;
                  pdir = EOLIAN_OUT_PARAM;
             }
             if (ftype == EOLIAN_PROP_SET) pdir = EOLIAN_IN_PARAM;
             if (ftype == EOLIAN_UNRESOLVED || ftype == EOLIAN_METHOD) add_star = (pdir == EOLIAN_OUT_PARAM || pdir == EOLIAN_INOUT_PARAM);
             Eina_Bool had_star = !!strchr(ptype, '*');

             eina_strbuf_append_printf(str_par, ", %s%s%s%s",
                   ptype, had_star?"":" ", add_star?"*":"", pname);

             eina_stringshare_del(ptype);
          }
        eina_iterator_free(itr);
     }

   if (rettypet) rettype = eolian_type_c_type_get(rettypet);

   eina_strbuf_replace_all(str_func, "@#rettype", rettype ? rettype : "void");
   if (!rettype || rettype[strlen(rettype) - 1] != '*')
     eina_strbuf_replace_all(str_func, "@#retspace", " ");
   else
     eina_strbuf_replace_all(str_func, "@#retspace", "");

   eina_strbuf_replace_all(str_func, "@#full_params", eina_strbuf_string_get(str_par));

   if (rettype) eina_stringshare_del(rettype);

   eina_strbuf_free(str_par);

   eina_strbuf_append(functext, eina_strbuf_string_get(str_func));
   eina_strbuf_free(str_func);

   return EINA_TRUE;
}

Eina_Bool
eo_header_generate(const Eolian_Class *class, Eina_Strbuf *buf)
{
   Eina_Iterator *itr;
   Eolian_Event *event;
   Eina_Strbuf * str_hdr = eina_strbuf_new();

   const Eolian_Documentation *doc = eolian_class_documentation_get(class);
   _class_env_create(class, NULL, &class_env);

   if (doc)
     {
        Eina_Strbuf *cdoc = docs_generate_full(doc, eolian_class_full_name_get(class), 0, EINA_FALSE);
        if (cdoc)
          {
             eina_strbuf_append(buf, eina_strbuf_string_get(cdoc));
             eina_strbuf_append_char(buf, '\n');
             eina_strbuf_free(cdoc);
          }
     }

   _template_fill(str_hdr, tmpl_eo_obj_header, class, NULL, NULL, EINA_TRUE);

   eina_strbuf_replace_all(str_hdr, "@#EOPREFIX", class_env.upper_eo_prefix);
   eina_strbuf_replace_all(str_hdr, "@#eoprefix", class_env.lower_eo_prefix);
   eina_strbuf_replace_all(str_hdr, "@#klasstype_get", eolian_class_c_get_function_name_get(class));

   Eina_Strbuf *str_ev = eina_strbuf_new();
   Eina_Strbuf *str_extrn_ev = eina_strbuf_new();
   Eina_Strbuf *tmpbuf = eina_strbuf_new();

   itr = eolian_class_events_get(class);
   EINA_ITERATOR_FOREACH(itr, event)
     {
        Eina_Stringshare *evname = eolian_event_c_name_get(event);
        const Eolian_Documentation *evdoc = eolian_event_documentation_get(event);
        Eolian_Object_Scope scope = eolian_event_scope_get(event);

        if (scope == EOLIAN_SCOPE_PRIVATE)
          continue;

        if (eolian_event_is_beta(event))
          {
             eina_strbuf_append_printf(str_ev, "\n#ifdef %s_BETA\n", class_env.upper_classname);
             eina_strbuf_append_printf(str_extrn_ev, "#ifdef %s_BETA\n", class_env.upper_classname);
          }
        if (scope == EOLIAN_SCOPE_PROTECTED)
          {
             if (!eolian_event_is_beta(event))
               eina_strbuf_append_char(str_ev, '\n');
             eina_strbuf_append_printf(str_ev, "#ifdef %s_PROTECTED\n", class_env.upper_classname);
             eina_strbuf_append_printf(str_extrn_ev, "#ifdef %s_PROTECTED\n", class_env.upper_classname);
          }

        if (!eolian_event_is_beta(event) && scope == EOLIAN_SCOPE_PUBLIC)
          eina_strbuf_append_char(str_ev, '\n');

        if (evdoc)
          {
             Eina_Strbuf *evdbuf = docs_generate_full(evdoc, eolian_class_full_name_get(class), 0, EINA_FALSE);
             eina_strbuf_append(str_ev, eina_strbuf_string_get(evdbuf));
             eina_strbuf_append_char(str_ev, '\n');
             eina_strbuf_free(evdbuf);
          }
        else
          eina_strbuf_append(str_ev, "/**\n * No description\n */\n");

        eina_strbuf_append_printf(str_ev, "#define %s (&(_%s))\n", evname, evname);
        eina_strbuf_append_printf(str_extrn_ev, "EOAPI extern const Eo_Event_Description _%s;\n", evname);
        eina_stringshare_del(evname);

        if (scope == EOLIAN_SCOPE_PROTECTED)
          {
             eina_strbuf_append(str_ev, "#endif\n");
             eina_strbuf_append(str_extrn_ev, "#endif\n");
          }
        if (eolian_event_is_beta(event))
          {
             eina_strbuf_append(str_ev, "#endif\n");
             eina_strbuf_append(str_extrn_ev, "#endif\n");
          }
     }
   eina_iterator_free(itr);

   if ((itr = eolian_class_implements_get(class)))
     {
        const Eolian_Implement *impl;
        EINA_ITERATOR_FOREACH(itr, impl)
          {
             if (eolian_implement_class_get(impl) != class)
               continue;
             Eolian_Function_Type ftype = EOLIAN_UNRESOLVED;
             const Eolian_Function *fid = eolian_implement_function_get(impl, &ftype);
             switch (ftype)
               {
                case EOLIAN_PROP_GET: case EOLIAN_PROP_SET:
                  eo_fundef_generate(class, fid, ftype, str_hdr);
                  break;
                case EOLIAN_PROPERTY:
                  eo_fundef_generate(class, fid, EOLIAN_PROP_SET, str_hdr);
                  eo_fundef_generate(class, fid, EOLIAN_PROP_GET, str_hdr);
                  break;
                default:
                  eo_fundef_generate(class, fid, EOLIAN_UNRESOLVED, str_hdr);
                  break;
               }
          }
        eina_iterator_free(itr);
     }

   eina_strbuf_append(str_hdr, eina_strbuf_string_get(str_extrn_ev));
   eina_strbuf_append(str_hdr, eina_strbuf_string_get(str_ev));

   eina_strbuf_append(buf, eina_strbuf_string_get(str_hdr));

   eina_strbuf_free(str_ev);
   eina_strbuf_free(str_extrn_ev);
   eina_strbuf_free(tmpbuf);
   eina_strbuf_free(str_hdr);

   return EINA_TRUE;
}

static Eina_Bool
eo_bind_func_generate(const Eolian_Class *class, const Eolian_Function *funcid, Eolian_Function_Type ftype, Eina_Strbuf *buf, Eolian_Implement *impl, _eolian_class_vars *impl_env)
{
   _eolian_class_func_vars func_env;
   const char *suffix = "";
   Eina_Bool var_as_ret = EINA_FALSE;
   const Eolian_Type *rettypet = NULL;
   const char *rettype = NULL;
   Eina_Bool add_star = EINA_FALSE;
   Eina_Iterator *itr;
   void *data, *data2;
   const Eolian_Expression *default_ret_val = NULL;
   Eina_Bool is_empty = impl ? eolian_implement_is_empty(impl) : eolian_function_is_empty(funcid, ftype);
   Eina_Bool is_auto = impl ? eolian_implement_is_auto(impl) : eolian_function_is_auto(funcid, ftype);
   if (ftype != EOLIAN_PROP_GET && ftype != EOLIAN_PROP_SET) ftype = eolian_function_type_get(funcid);
   Eina_Bool is_prop = (ftype == EOLIAN_PROP_GET || ftype == EOLIAN_PROP_SET);

   Eina_Bool has_promise = EINA_FALSE;
   const char* promise_param_name = NULL;
   const char* promise_value_type = NULL;
   Eina_Bool need_implementation = EINA_TRUE;
   if (!impl_env && eolian_function_is_virtual_pure(funcid, ftype)) need_implementation = EINA_FALSE;

   Eina_Strbuf *fbody = eina_strbuf_new();
   Eina_Strbuf *va_args = eina_strbuf_new();
   Eina_Strbuf *params = eina_strbuf_new(); /* only variables names */
   Eina_Strbuf *full_params = eina_strbuf_new(); /* variables types + names */
   Eina_Strbuf *impl_full_params = eina_strbuf_new(); /* variables types + names */
   Eina_Strbuf *params_init = eina_strbuf_new(); /* init of variables to default */

   rettypet = eolian_function_return_type_get(funcid, ftype);
   if (rettypet)
     {
        is_auto = EINA_FALSE; /* We block auto when the function has to return something */
        default_ret_val = eolian_function_return_default_value_get(funcid, ftype);
     }
   if (ftype == EOLIAN_PROP_GET)
     {
        suffix = "_get";
        add_star = EINA_TRUE;
        if (!rettypet)
          {
             itr = eolian_property_values_get(funcid, ftype);
             /* We want to check if there is only one parameter */
             if (eina_iterator_next(itr, &data) && !eina_iterator_next(itr, &data2))
               {
                  Eolian_Function_Parameter *param = data;
                  rettypet = eolian_parameter_type_get(param);
                  var_as_ret = EINA_TRUE;
                  default_ret_val = eolian_parameter_default_value_get(param);
               }
             eina_iterator_free(itr);
          }
     }
   if (ftype == EOLIAN_PROP_SET)
     {
        suffix = "_set";
     }

   itr = eolian_property_keys_get(funcid, ftype);
   EINA_ITERATOR_FOREACH(itr, data)
     {
        Eolian_Function_Parameter *param = data;
        const Eolian_Type *ptypet = eolian_parameter_type_get(param);
        const char *pname = eolian_parameter_name_get(param);
        const char *ptype = eolian_type_c_type_get(ptypet);
        if (eina_strbuf_length_get(params)) eina_strbuf_append(params, ", ");
        eina_strbuf_append_printf(params, "%s", pname);
        eina_strbuf_append_printf(full_params, ", %s %s%s",
              ptype, pname, is_empty || is_auto?" EINA_UNUSED":"");
        eina_strbuf_append_printf(impl_full_params, ", %s %s%s",
              ptype, pname, is_empty || is_auto?" EINA_UNUSED":"");
        eina_stringshare_del(ptype);
     }
   eina_iterator_free(itr);
   if (!var_as_ret)
     {
        itr = is_prop ? eolian_property_values_get(funcid, ftype) : eolian_function_parameters_get(funcid);
        EINA_ITERATOR_FOREACH(itr, data)
          {
             Eolian_Function_Parameter *param = data;
             const Eolian_Expression *dflt_value = eolian_parameter_default_value_get(param);
             const Eolian_Type *ptypet = eolian_parameter_type_get(param);
             const char *pname = eolian_parameter_name_get(param);
             const char *ptype = eolian_type_c_type_get(ptypet);
             Eolian_Parameter_Dir pdir = eolian_parameter_direction_get(param);
             Eina_Bool had_star = !!strchr(ptype, '*');

             if (ftype == EOLIAN_UNRESOLVED || ftype == EOLIAN_METHOD) add_star = (pdir == EOLIAN_OUT_PARAM || pdir == EOLIAN_INOUT_PARAM);
             if (eina_strbuf_length_get(params)) eina_strbuf_append(params, ", ");

             if(!has_promise && !strcmp(ptype, "Eina_Promise *") &&
                (ftype == EOLIAN_UNRESOLVED || ftype == EOLIAN_METHOD) && pdir == EOLIAN_INOUT_PARAM)
               {
                  Eina_Iterator* promise_values;
                  has_promise = EINA_TRUE;
                  promise_param_name = eina_stringshare_add(pname);
                  promise_values = eolian_type_subtypes_get(eolian_type_base_type_get(ptypet));
                  Eolian_Type* subtype;
                  if(eina_iterator_next(promise_values, (void**)&subtype))
                      promise_value_type = eolian_type_c_type_get(subtype);
                  eina_strbuf_append_printf(impl_full_params, ", Eina_Promise_Owner *%s%s",
                         pname, is_empty && !dflt_value ?" EINA_UNUSED":"");
                  eina_strbuf_append_printf(params, "__eo_promise");
               }
             else
               {
                  eina_strbuf_append_printf(impl_full_params, ", %s%s%s%s%s",
                        ptype, had_star?"":" ", add_star?"*":"", pname, is_empty && !dflt_value ?" EINA_UNUSED":"");
                  eina_strbuf_append_printf(params, "%s", pname);
               }

             eina_strbuf_append_printf(full_params, ", %s%s%s%s%s",
                   ptype, had_star?"":" ", add_star?"*":"", pname, is_empty && !dflt_value ?" EINA_UNUSED":"");
             if (is_auto)
               {
                  if (ftype == EOLIAN_PROP_SET)
                    {
                       eina_strbuf_append_printf(params_init,
                             "   %s = pd->%s;\n", pname, pname);
                    }
                  else
                    {
                       eina_strbuf_append_printf(params_init,
                             "   if (%s) *%s = pd->%s;\n", pname, pname, pname);
                    }
               }
             else {
                  if (ftype != EOLIAN_PROP_SET)
                    {
                       if (dflt_value)
                         {
                            const char *val_str = NULL;
                            Eolian_Value val = eolian_expression_eval
                               (dflt_value, EOLIAN_MASK_ALL);
                            if (val.type)
                              {
                                 val_str = eolian_expression_value_to_literal(&val);
                                 eina_strbuf_append_printf(params_init,
                                       "   if (%s) *%s = %s;",
                                       pname, pname, val_str);
                                 if (eolian_expression_type_get(dflt_value) == EOLIAN_EXPR_NAME)
                                   {
                                      Eina_Stringshare *string = eolian_expression_serialize(dflt_value);
                                      eina_strbuf_append_printf(params_init, " /* %s */", string);
                                      eina_stringshare_del(string);
                                   }
                                 eina_strbuf_append_printf(params_init, "\n");
                              }
                         }
                    }
               }
             eina_stringshare_del(ptype);
          }
        eina_iterator_free(itr);
     }

   if (rettypet) rettype = eolian_type_c_type_get(rettypet);

   if (need_implementation)
     {
        Eina_Strbuf *ret_param = eina_strbuf_new();
        eina_strbuf_append_printf(fbody, "\n");
        /* Generation of the user function prototype declaration - not needed when @auto and @empty are indicated */
        if (!is_empty && !is_auto)
          {
             eina_strbuf_append_printf(fbody, "%s _%s%s%s_%s%s(%sEo *obj, @#Datatype_Data *pd%s);\n\n",
                   rettype?rettype:"void",
                   class_env.lower_classname,
                   impl_env?"_":"",
                   impl_env?impl_env->lower_classname:"",
                   eolian_function_name_get(funcid), suffix,
                   eolian_function_object_is_const(funcid)?"const ":"",
                   eina_strbuf_string_get(impl_full_params));
          }

        if (is_empty || is_auto || eina_strbuf_length_get(params_init))
          {
             /* We need to give the internal function name to Eo. We use this hash table as indication */
             eina_hash_add(_funcs_params_init,
                   eina_stringshare_add(eolian_function_name_get(funcid)), (void *)ftype);
             /* Generation of the intermediate function __eolian_... */
             eina_strbuf_append_printf(fbody, "static %s __eolian_%s%s%s_%s%s(%sEo *obj%s, @#Datatype_Data *pd%s%s)\n{\n",
                   rettype?rettype:"void",
                   class_env.lower_classname,
                   impl_env?"_":"",
                   impl_env?impl_env->lower_classname:"",
                   eolian_function_name_get(funcid), suffix,
                   eolian_function_object_is_const(funcid)?"const ":"",
                   is_empty || is_auto?" EINA_UNUSED":"",
                   is_empty || (is_auto && !eina_strbuf_length_get(params_init))?" EINA_UNUSED":"",
                   eina_strbuf_string_get(impl_full_params));
          }
        if (eina_strbuf_length_get(params_init))
          {
             eina_strbuf_append_printf(fbody, "%s", eina_strbuf_string_get(params_init));
          }
        if (is_auto || is_empty)
          {
             if (rettype)
               {
                  /* return for auto and empty */
                  const char *val_str = NULL;
                  if (default_ret_val)
                    {
                       Eolian_Value val = eolian_expression_eval
                          (default_ret_val, EOLIAN_MASK_ALL);
                       if (val.type)
                          val_str = eolian_expression_value_to_literal(&val);
                    }
                  eina_strbuf_append_printf(fbody, "   return %s;\n", val_str?val_str:"0");
               }
             eina_strbuf_append_printf(fbody, "}\n\n");
          }
        else if (eina_strbuf_length_get(params_init))
          {
             /* Generation of the user function invocation, e.g return _user_foo(obj, pd, ...) */
             eina_strbuf_append_printf(fbody, "   %s_%s%s%s_%s%s(obj, pd, %s);\n}\n\n",
                   rettype?"return ":"",
                   class_env.lower_classname,
                   impl_env?"_":"",
                   impl_env?impl_env->lower_classname:"",
                   eolian_function_name_get(funcid), suffix,
                   eina_strbuf_string_get(params));
          }
        eina_strbuf_free(ret_param);
     }
   if (!impl_env)
     {
        Eina_Strbuf *eo_func_decl = eina_strbuf_new();
        Eina_Bool has_params = EINA_FALSE;

        itr = eolian_property_keys_get(funcid, ftype);
        has_params |= (eina_iterator_next(itr, &data));
        eina_iterator_free(itr);

        if (!has_params && !var_as_ret)
          {
             itr = is_prop ? eolian_property_values_get(funcid, ftype) : eolian_function_parameters_get(funcid);
             has_params |= (eina_iterator_next(itr, &data));
             eina_iterator_free(itr);
          }
        Eina_Bool ret_is_void = (!rettype || !strcmp(rettype, "void"));
        _class_func_env_create(class, eolian_function_name_get(funcid), ftype, &func_env);
        eina_strbuf_append_printf(eo_func_decl,
              "EOAPI EO_%sFUNC_BODY%s%s(%s",
              ret_is_void?"VOID_":"", has_params?"V":"",
              (ftype == EOLIAN_PROP_GET ||
               eolian_function_object_is_const(funcid) ||
               eolian_function_is_class(funcid))?"_CONST":"", func_env.lower_eo_func);
        if (!ret_is_void)
          {
             const char *val_str = NULL;
             if (default_ret_val)
               {
                  Eolian_Value val = eolian_expression_eval
                    (default_ret_val, EOLIAN_MASK_ALL);
                  if (val.type)
                    val_str = eolian_expression_value_to_literal(&val);
               }
             eina_strbuf_append_printf(eo_func_decl, ", %s, %s",
                   rettype, val_str?val_str:"0");
             if (val_str && eolian_expression_type_get(default_ret_val) == EOLIAN_EXPR_NAME)
               {
                  Eina_Stringshare *string = eolian_expression_serialize(default_ret_val);
                  eina_strbuf_append_printf(eo_func_decl, " /* %s */", string);
                  eina_stringshare_del(string);
               }
          }
        if (has_params)
          {
             eina_strbuf_replace_all(full_params, " EINA_UNUSED", "");
             eina_strbuf_append_printf(eo_func_decl, ", EO_FUNC_CALL(%s)%s",
                   eina_strbuf_string_get(params),
                   eina_strbuf_string_get(full_params));
          }
        eina_strbuf_append_printf(eo_func_decl, ");");

        if(has_promise)
          {
             eina_strbuf_append_printf(fbody,
                                       "#undef _EO_API_BEFORE_HOOK\n#undef _EO_API_AFTER_HOOK\n#undef _EO_API_CALL_HOOK\n"
                                       "#define _EO_API_BEFORE_HOOK _EINA_PROMISE_BEFORE_HOOK(%s, %s%s)\n"
                                       "#define _EO_API_AFTER_HOOK _EINA_PROMISE_AFTER_HOOK(%s)\n"
                                       "#define _EO_API_CALL_HOOK(x) _EINA_PROMISE_CALL_HOOK(EO_FUNC_CALL(%s))\n\n",
                                       promise_value_type, !rettype ? "void" : rettype,
                                       eina_strbuf_string_get(impl_full_params),
                                       promise_param_name,
                                       eina_strbuf_string_get(params));
          }

        eina_strbuf_append_printf(fbody, "%s\n", eina_strbuf_string_get(eo_func_decl));

        if(has_promise)
          {
             eina_strbuf_append_printf(fbody, "\n#undef _EO_API_BEFORE_HOOK\n#undef _EO_API_AFTER_HOOK\n#undef _EO_API_CALL_HOOK\n"
                                       "#define _EO_API_BEFORE_HOOK\n#define _EO_API_AFTER_HOOK\n"
                                       "#define _EO_API_CALL_HOOK(x) x\n");
          }

        eina_strbuf_free(eo_func_decl);
     }

   if (need_implementation)
     {
        Eina_Bool is_cf = eolian_function_is_class(funcid);
        const char *data_type = eolian_class_data_type_get(class);
        if (is_cf || (data_type && !strcmp(data_type, "null")))
           eina_strbuf_replace_all(fbody, "@#Datatype_Data", "void");
        else
          {
             if (data_type) eina_strbuf_replace_all(fbody, "@#Datatype_Data", data_type);
             else eina_strbuf_replace_all(fbody, "@#Datatype", class_env.full_classname);
          }

        if (!data_type || !strcmp(data_type, "null"))
           eina_strbuf_replace_all(fbody, "@#Datatype", class_env.full_classname);
        else
           eina_strbuf_replace_all(fbody, "@#Datatype_Data", data_type);
     }
   eina_strbuf_append(buf, eina_strbuf_string_get(fbody));

   if (rettype) eina_stringshare_del(rettype);

   eina_strbuf_free(va_args);
   eina_strbuf_free(full_params);
   eina_strbuf_free(impl_full_params);
   eina_strbuf_free(params_init);
   eina_strbuf_free(params);
   eina_strbuf_free(fbody);
   return EINA_TRUE;
}

static Eina_Bool
eo_op_desc_generate(const Eolian_Class *class, const Eolian_Function *fid, Eolian_Function_Type ftype,
                    Eina_Strbuf *buf)
{
   _eolian_class_func_vars func_env;
   const char *funcname = eolian_function_name_get(fid);
   const char *suffix = "";

   eina_strbuf_reset(buf);
   _class_func_env_create(class, funcname, ftype, &func_env);
   if (ftype == EOLIAN_PROP_GET) suffix = "_get";
   if (ftype == EOLIAN_PROP_SET) suffix = "_set";
   Eina_Bool is_virtual_pure = eolian_function_is_virtual_pure(fid, ftype);
   const char *class_str = "";
   if (eolian_function_is_class(fid)) class_str = "CLASS_";
   eina_strbuf_append_printf(buf, "\n     EO_OP_%sFUNC(%s, ", class_str, func_env.lower_eo_func);
   if (!is_virtual_pure)
     {
        Eolian_Function_Type ftype2 = (Eolian_Function_Type) eina_hash_find(_funcs_params_init, funcname);
        eina_strbuf_append_printf(buf, "%s_%s_%s%s),",
              ftype == ftype2?"__eolian":"",
              class_env.lower_classname, funcname, suffix);
     }
   else
      eina_strbuf_append_printf(buf, "NULL),");

   return EINA_TRUE;
}

static Eina_Bool
eo_source_beginning_generate(const Eolian_Class *class, Eina_Strbuf *buf)
{
   Eina_Iterator *itr;

   Eina_Strbuf *tmpbuf = eina_strbuf_new();

   Eolian_Event *event;
   itr = eolian_class_events_get(class);
   EINA_ITERATOR_FOREACH(itr, event)
     {
        Eina_Stringshare *evname = eolian_event_c_name_get(event);

        eina_strbuf_append_printf(tmpbuf,
                                  "EOAPI const Eo_Event_Description _%s =\n   EO_EVENT_DESCRIPTION%s%s(\"%s\");\n",
                                  evname,
                                  eolian_event_is_hot(event) ? "_HOT" : "",
                                  eolian_event_is_restart(event) ? "_RESTART" : "",
                                  eolian_event_name_get(event));
        eina_stringshare_del(evname);
     }
   eina_iterator_free(itr);

   eina_strbuf_append(buf, eina_strbuf_string_get(tmpbuf));

   eina_strbuf_free(tmpbuf);
   return EINA_TRUE;
}

static void
_desc_generate(const Eolian_Class *class, const Eolian_Function *fid, Eolian_Function_Type ftype, Eina_Strbuf *tmpbuf, Eina_Strbuf *str_op)
{
   const char *funcname = eolian_function_name_get(fid);
   char tmpstr[256];
   snprintf(tmpstr, sizeof(tmpstr), "%s%s", funcname, (ftype == EOLIAN_PROP_SET)
     ? "_set" : ((ftype == EOLIAN_PROP_GET) ? "_get" : ""));

   eo_op_desc_generate(class, fid, ftype, tmpbuf);
   eina_strbuf_append(str_op, eina_strbuf_string_get(tmpbuf));
}

static Eina_Bool
eo_source_end_generate(const Eolian_Class *class, Eina_Strbuf *buf)
{
   Eina_Bool ret = EINA_FALSE;
   Eina_Iterator *itr;
   Eolian_Implement *impl_desc;
   Eolian_Event *event;
   const char *inherit_name;

   const char *str_classtype = NULL;
   switch(eolian_class_type_get(class))
    {
      case EOLIAN_CLASS_REGULAR:
        str_classtype = "EO_CLASS_TYPE_REGULAR";
        break;
      case EOLIAN_CLASS_ABSTRACT:
        str_classtype = "EO_CLASS_TYPE_REGULAR_NO_INSTANT";
        break;
      case EOLIAN_CLASS_MIXIN:
        str_classtype = "EO_CLASS_TYPE_MIXIN";
        break;
      case EOLIAN_CLASS_INTERFACE:
        str_classtype = "EO_CLASS_TYPE_INTERFACE";
        break;
      default:
        break;
    }

   if (!str_classtype)
     {
        fprintf(stderr, "eolian: unknown class type for class '%s'\n",
                class_env.full_classname);
        return EINA_FALSE;
     }

   Eina_Strbuf *str_end = eina_strbuf_new();
   Eina_Strbuf *tmpbuf = eina_strbuf_new();
   Eina_Strbuf *str_op = eina_strbuf_new();
   Eina_Strbuf *str_bodyf = eina_strbuf_new();
   Eina_Strbuf *str_ev = eina_strbuf_new();

   _template_fill(str_end, tmpl_eo_src, class, NULL, NULL, EINA_TRUE);

   eina_strbuf_replace_all(str_end, "@#type_class", str_classtype);
   eina_strbuf_replace_all(str_end, "@#EOPREFIX", class_env.upper_eo_prefix);
   eina_strbuf_replace_all(str_end, "@#eoprefix", class_env.lower_eo_prefix);
   eina_strbuf_replace_all(str_end, "@#klasstype_get", eolian_class_c_get_function_name_get(class));

   eina_strbuf_reset(tmpbuf);
   eina_strbuf_replace_all(str_end, "@#ctor_func", eina_strbuf_string_get(tmpbuf));

   eina_strbuf_reset(tmpbuf);
   if (eolian_class_ctor_enable_get(class))
      _template_fill(tmpbuf, "_@#class_class_constructor", class, NULL, NULL, EINA_TRUE);
   else
      eina_strbuf_append_printf(tmpbuf, "NULL");
   eina_strbuf_replace_all(str_end, "@#ctor_name", eina_strbuf_string_get(tmpbuf));

   eina_strbuf_reset(tmpbuf);
   if (eolian_class_dtor_enable_get(class))
     {
        eina_strbuf_replace_all(str_end, "@#dtor_func", eina_strbuf_string_get(tmpbuf));
        eina_strbuf_reset(tmpbuf);
        _template_fill(tmpbuf, "_@#class_class_destructor", class, NULL, NULL, EINA_TRUE);
        eina_strbuf_replace_all(str_end, "@#dtor_name", eina_strbuf_string_get(tmpbuf));
     }
   else
     {
        eina_strbuf_replace_all(str_end, "@#dtor_func", "");
        eina_strbuf_replace_all(str_end, "@#dtor_name", "NULL");
     }

   eina_strbuf_reset(tmpbuf);

   //Implements - TODO one generate func def for all
   itr = eolian_class_implements_get(class);
   EINA_ITERATOR_FOREACH(itr, impl_desc)
     {
        _eolian_class_vars impl_env;
        char implname[0xFF];
        const Eolian_Class *impl_class = NULL;
        Eolian_Function_Type ftype;
        const Eolian_Function *fnid = NULL;
        const char *funcname = NULL;

        const char *names[] = { "", "getter ", "setter " };

        impl_class = eolian_implement_class_get(impl_desc);

        if (impl_class)
          {
             char *tp = implname;
             if (impl_class == class)
               continue;
             fnid = eolian_implement_function_get(impl_desc, &ftype);
             _class_env_create(impl_class, NULL, &impl_env);
             funcname = eolian_function_name_get(fnid);

             Eina_Bool dflt_values = EINA_FALSE;
             Eina_Iterator *pitr = NULL;
             if (!eolian_implement_is_auto(impl_desc) && fnid && (ftype != EOLIAN_PROP_SET))
               {
                  Eolian_Function_Parameter *param;
                  pitr = (ftype == EOLIAN_METHOD) ? eolian_function_parameters_get(fnid)
                                                  : eolian_property_values_get(fnid, ftype);
                  EINA_ITERATOR_FOREACH(pitr, param)
                    {
                       const Eolian_Expression *dflt_value = eolian_parameter_default_value_get(param);
                       if (dflt_value)
                         {
                            Eolian_Value val = eolian_expression_eval
                               (dflt_value, EOLIAN_MASK_ALL);
                            if (val.type)
                              {
                                 dflt_values = EINA_TRUE;
                                 break;
                              }
                         }
                    }
                  eina_iterator_free(pitr);
               }

             sprintf(implname, "%s_%s_%s",
                   (eolian_implement_is_auto(impl_desc) || eolian_implement_is_empty(impl_desc) || dflt_values)?
                   "__eolian":"",
                   class_env.full_classname, impl_env.full_classname);
             eina_str_tolower(&tp);
          }

        if (!fnid)
          {
             const char *name = names[eolian_implement_is_prop_get(impl_desc)
                                   | (eolian_implement_is_prop_set(impl_desc) << 1)];
             fprintf(stderr, "eolian: failed to generate implementation of '%s%s' - missing from superclass\n",
                     name, eolian_implement_full_name_get(impl_desc));
             goto end;
          }

        const char *class_str = "";
        if (eolian_function_is_class(fnid)) class_str = "CLASS_";

        switch (ftype)
          {
           case EOLIAN_PROP_SET: case EOLIAN_PROP_GET: case EOLIAN_PROPERTY:
              if (ftype != EOLIAN_PROP_GET)
                {
                   Eina_Stringshare *rets = eolian_function_full_c_name_get(fnid, EOLIAN_PROP_SET, EINA_FALSE);
                   eina_strbuf_append_printf(str_op, "\n     EO_OP_%sFUNC_OVERRIDE(%s, %s_%s_set),",
                         class_str, rets, implname, funcname);
                   eo_bind_func_generate(class, fnid, EOLIAN_PROP_SET, str_bodyf, impl_desc, &impl_env);
                   eina_stringshare_del(rets);
                }

              if (ftype != EOLIAN_PROP_SET)
                {
                   Eina_Stringshare *rets = eolian_function_full_c_name_get(fnid, EOLIAN_PROP_GET, EINA_FALSE);
                   eina_strbuf_append_printf(str_op, "\n     EO_OP_%sFUNC_OVERRIDE(%s, %s_%s_get),",
                         class_str, rets, implname, funcname);
                   eo_bind_func_generate(class, fnid, EOLIAN_PROP_GET, str_bodyf, impl_desc, &impl_env);
                   eina_stringshare_del(rets);
                }
              break;
           default:
             {
                Eina_Stringshare *rets = eolian_function_full_c_name_get(fnid, ftype, EINA_FALSE);
                eina_strbuf_append_printf(str_op, "\n     EO_OP_%sFUNC_OVERRIDE(%s, %s_%s),",
                      class_str, rets, implname, funcname);
                eo_bind_func_generate(class, fnid, ftype, str_bodyf, impl_desc, &impl_env);
                eina_stringshare_del(rets);
                break;
             }
          }
     }
   eina_iterator_free(itr);

   if ((itr = eolian_class_implements_get(class)))
     {
        const Eolian_Implement *impl;
        EINA_ITERATOR_FOREACH(itr, impl)
          {
             if (eolian_implement_class_get(impl) != class)
               continue;
             Eolian_Function_Type ftype = EOLIAN_UNRESOLVED;
             const Eolian_Function *fid = eolian_implement_function_get(impl, &ftype);

             Eina_Bool prop_read  = (ftype == EOLIAN_PROPERTY || ftype == EOLIAN_PROP_GET);
             Eina_Bool prop_write = (ftype == EOLIAN_PROPERTY || ftype == EOLIAN_PROP_SET);

             if (!prop_read && !prop_write && !eolian_function_is_legacy_only(fid, EOLIAN_METHOD))
               _desc_generate(class, fid, EOLIAN_METHOD, tmpbuf, str_op);
             if (prop_write && !eolian_function_is_legacy_only(fid, EOLIAN_PROP_SET))
               _desc_generate(class, fid, EOLIAN_PROP_SET, tmpbuf, str_op);
             if (prop_read && !eolian_function_is_legacy_only(fid, EOLIAN_PROP_GET))
               _desc_generate(class, fid, EOLIAN_PROP_GET, tmpbuf, str_op);
          }
        eina_iterator_free(itr);
     }

   itr = eolian_class_events_get(class);
   EINA_ITERATOR_FOREACH(itr, event)
     {
        Eina_Stringshare *evname = eolian_event_c_name_get(event);
        eina_strbuf_append_printf(str_ev, "\n     %s,", evname);
        eina_stringshare_del(evname);
     }
   eina_iterator_free(itr);

   eina_strbuf_reset(tmpbuf);
   if (eina_strbuf_length_get(str_ev))
     {
        Eina_Strbuf *events_desc = eina_strbuf_new();
        _template_fill(events_desc, tmpl_events_desc, class, NULL, NULL, EINA_TRUE);
        eina_strbuf_replace_all(events_desc, "@#list_evdesc", eina_strbuf_string_get(str_ev));
        eina_strbuf_replace_all(str_end, "@#events_desc", eina_strbuf_string_get(events_desc));
        eina_strbuf_free(events_desc);
        eina_strbuf_append_printf(tmpbuf, "_%s_event_desc", class_env.lower_classname);
     }
   else
     {
        eina_strbuf_append_printf(tmpbuf, "NULL");
        eina_strbuf_replace_all(str_end, "@#events_desc", "");
     }
   eina_strbuf_replace_all(str_end, "@#Events_Desc", eina_strbuf_string_get(tmpbuf));

   eina_strbuf_reset(tmpbuf);
   itr = eolian_class_inherits_get(class);
   EINA_ITERATOR_FOREACH(itr, inherit_name)
     {
        const Eolian_Class *inherit_class = eolian_class_get_by_name(inherit_name);
        _eolian_class_vars inherit_env;
        assert(inherit_class);
        _class_env_create(inherit_class, NULL, &inherit_env);
        eina_strbuf_append_printf(tmpbuf, "%s_%s, ", inherit_env.upper_classname,
                                  inherit_env.upper_classtype);
     }
   eina_iterator_free(itr);

   if (eina_strbuf_length_get(tmpbuf) == 0) eina_strbuf_append(tmpbuf, "NULL, ");
   eina_strbuf_replace_all(str_end, "@#list_inherit", eina_strbuf_string_get(tmpbuf));

   eina_strbuf_reset(tmpbuf);
   if (eina_strbuf_length_get(str_op))
     {
        Eina_Strbuf *ops_desc = eina_strbuf_new();
        _template_fill(ops_desc, tmpl_eo_ops_desc, class, NULL, NULL, EINA_TRUE);
        eina_strbuf_replace_all(ops_desc, "@#list_op", eina_strbuf_string_get(str_op));
        eina_strbuf_replace_all(str_end, "@#ops_desc", eina_strbuf_string_get(ops_desc));
        eina_strbuf_free(ops_desc);
        _template_fill(tmpbuf,
              "EO_CLASS_DESCRIPTION_OPS(_@#class_op_desc)",
              class, NULL, NULL, EINA_TRUE);
     }
   else
     {
        eina_strbuf_replace_all(str_end, "@#ops_desc", "");
        eina_strbuf_append_printf(tmpbuf, "EO_CLASS_DESCRIPTION_NOOPS()");
     }

   eina_strbuf_replace_all(str_end, "@#functions_body", eina_strbuf_string_get(str_bodyf));
   eina_strbuf_replace_all(str_end, "@#eo_class_desc_ops", eina_strbuf_string_get(tmpbuf));

   const char *data_type = eolian_class_data_type_get(class);
   if (data_type && !strcmp(data_type, "null"))
      eina_strbuf_replace_all(str_end, "@#SizeOfData", "0");
   else
     {
        Eina_Strbuf *sizeofbuf = eina_strbuf_new();
        eina_strbuf_append_printf(sizeofbuf, "sizeof(%s%s)",
              data_type?data_type:class_env.full_classname,
              data_type?"":"_Data");
        eina_strbuf_replace_all(str_end, "@#SizeOfData", eina_strbuf_string_get(sizeofbuf));
        eina_strbuf_free(sizeofbuf);
     }
   eina_strbuf_append(buf, eina_strbuf_string_get(str_end));

   ret = EINA_TRUE;
end:
   eina_strbuf_free(tmpbuf);
   eina_strbuf_free(str_op);
   eina_strbuf_free(str_bodyf);
   eina_strbuf_free(str_end);
   eina_strbuf_free(str_ev);

   return ret;
}

Eina_Bool
eo_source_generate(const Eolian_Class *class, Eina_Strbuf *buf)
{
   Eina_Bool ret = EINA_FALSE;
   Eina_Iterator *itr = NULL;

   Eina_Strbuf *str_bodyf = eina_strbuf_new();

   _class_env_create(class, NULL, &class_env);
   _funcs_params_init = eina_hash_stringshared_new(NULL);

   if (!eo_source_beginning_generate(class, buf)) goto end;

   if ((itr = eolian_class_implements_get(class)))
     {
        const Eolian_Implement *impl;
        EINA_ITERATOR_FOREACH(itr, impl)
          {
             if (eolian_implement_class_get(impl) != class)
               continue;
             Eolian_Function_Type ftype = EOLIAN_UNRESOLVED;
             const Eolian_Function *fid = eolian_implement_function_get(impl, &ftype);
             switch (ftype)
               {
                case EOLIAN_PROP_GET: case EOLIAN_PROP_SET:
                  if (!eo_bind_func_generate(class, fid, ftype, str_bodyf, NULL, NULL))
                    goto end;
                  break;
                case EOLIAN_PROPERTY:
                  if (!eo_bind_func_generate(class, fid, EOLIAN_PROP_SET, str_bodyf, NULL, NULL))
                    goto end;
                  if (!eo_bind_func_generate(class, fid, EOLIAN_PROP_GET, str_bodyf, NULL, NULL))
                    goto end;
                  break;
                default:
                  if (!eo_bind_func_generate(class, fid, EOLIAN_UNRESOLVED, str_bodyf, NULL, NULL))
                    goto end;
                  break;
               }
          }
        eina_iterator_free(itr);
        itr = NULL;
     }

   eina_strbuf_append(buf, eina_strbuf_string_get(str_bodyf));
   eina_strbuf_reset(str_bodyf);

   if (!eo_source_end_generate(class, buf)) goto end;

   ret = EINA_TRUE;
end:
   if (itr) eina_iterator_free(itr);
   eina_hash_free(_funcs_params_init);
   _funcs_params_init = NULL;
   eina_strbuf_free(str_bodyf);
   return ret;
}