/*
    Copyright (C) 2012 Modelon AB

    This program is free software: you can redistribute it and/or modify
    it under the terms of the BSD style license.

     This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    FMILIB_License.txt file for more details.

    You should have received a copy of the FMILIB_License.txt file
    along with this program. If not, contact Modelon AB <http://www.modelon.com>.
*/

#ifndef FMI2_XML_TYPEIMPL_H
#define FMI2_XML_TYPEIMPL_H

#include <JM/jm_named_ptr.h>
#include <JM/jm_string_set.h>
#include <FMI2/fmi2_xml_model_description.h>

#include "fmi2_xml_parser.h"

#ifdef __cplusplus
extern "C" {
#endif

/** \defgroup Type definitions supporting structures

  The type structures are designed to save memory and
  to enable handling of diff-sets in the future.
  For each basic type (Real, Integer, each Enumeration, String & Boolean)
  there is a default instance of fmi2_xml_variable_type_base_t with 
  structKind=fmi2_xml_type_struct_enu_props. Those instances have 
  baseTypeStruct = NULL. 

  Each type definition creates 1 or 2 instances:
  (1)  instance with structKind=fmi2_xml_type_struct_enu_typedef
    that gives the name & description of the type. baseType is a
    pointer to either  fmi2_xml_type_struct_enu_base or fmi2_xml_type_struct_enu_props
  (2)  optionally, an instance with the structKind=fmi2_xml_type_contrain_properties
    providing information on min/max/quantity/etc. baseType is a pointer
    to the default properties struct.

   Each variable definition may create none, 1 or 2 instances:
    (1) fmi2_xml_type_struct_enu_start providing the start value
    (2) structKind=fmi2_xml_type_struct_enu_props  providing information on min/max/quantity/etc.
    baseType is a pointer to either fmi2_xml_type_struct_enu_base or fmi2_xml_type_struct_enu_typedef.

   For Enums there are two different property structs since type definition
   gives the list of items and variables give min and max.
 */

typedef enum {
    fmi2_xml_type_struct_enu_typedef,
    fmi2_xml_type_struct_enu_props,
    fmi2_xml_type_struct_enu_start
} fmi2_xml_type_struct_kind_enu_t;

typedef struct fmi2_xml_variable_type_base_t fmi2_xml_variable_type_base_t;

struct fmi2_xml_variable_type_base_t {
    fmi2_xml_variable_type_base_t* baseTypeStruct; /* The fmi2_xml_variable_type_base structs are put on a list that provide needed info on a variable */

    fmi2_xml_variable_type_base_t* next;    /** dynamically allocated fmi2_xml_variable_type_base structs are put on a linked list to prevent memory leaks*/

    char structKind; /* one of fmi2_xml_type_contrains_kind.*/
    char baseType;   /* one of fmi2_xml_base_type */
    char isRelativeQuantity;   /* relativeQuantity flag set. Only used in fmi2_xml_real_type_props_t) */
	char isUnbounded;          /* unbounded flag set only used in fmi2_xml_real_type_props_t) */
} ;

/* 
	Variable type definition is general and is used for all types.
	This is done to enable easy handling of SimpleType XML element 
	(specific type element comes next).
*/
struct fmi2_xml_variable_typedef_t {
    fmi2_xml_variable_type_base_t typeBase;
    jm_string description;
    char typeName[1];
};

typedef struct fmi2_xml_real_type_props_t {
    fmi2_xml_variable_type_base_t typeBase;
    jm_string quantity;

    fmi2_xml_display_unit_t* displayUnit;

    double typeMin;
    double typeMax;
    double typeNominal;
} fmi2_xml_real_type_props_t;

typedef struct fmi2_xml_integer_type_props_t {
    fmi2_xml_variable_type_base_t typeBase;

    jm_string  quantity;

    int typeMin;
    int typeMax;
} fmi2_xml_integer_type_props_t;

typedef fmi2_xml_variable_type_base_t fmi2_xml_string_type_props_t;
typedef fmi2_xml_variable_type_base_t fmi2_xml_bool_type_props_t;

typedef struct fmi2_xml_enum_type_item_t {
    jm_string itemName;
	int value;
    char itemDesciption[1];
} fmi2_xml_enum_type_item_t;

static int fmi1_xml_compare_enum_val (const void* first, const void* second) {
	const jm_named_ptr* a = first;
	const jm_named_ptr* b = second;
	fmi2_xml_enum_type_item_t* ai = a->ptr;
	fmi2_xml_enum_type_item_t* bi = b->ptr;
	return (ai->value - bi->value);
}

typedef struct fmi2_xml_enum_variable_props_t {
    fmi2_xml_variable_type_base_t typeBase;

    jm_string  quantity;

    int typeMin;
    int typeMax;
} fmi2_xml_enum_variable_props_t;

typedef struct fmi2_xml_enum_typedef_props_t {
	fmi2_xml_enum_variable_props_t base;
    jm_vector(jm_named_ptr) enumItems;
} fmi2_xml_enum_typedef_props_t;

typedef struct fmi2_xml_variable_start_real_t {
    fmi2_xml_variable_type_base_t typeBase;
    double start;
} fmi2_xml_variable_start_real_t ;

/* fmi2_xml_variable_start_integer is used for boolean and enums as well*/
typedef struct fmi2_xml_variable_start_integer_t {
    fmi2_xml_variable_type_base_t typeBase;
    int start;
} fmi2_xml_variable_start_integer_t ;

typedef struct fmi2_xml_variable_start_string_t {
    fmi2_xml_variable_type_base_t typeBase;
    char start[1];
} fmi2_xml_variable_start_string_t;

static fmi2_xml_variable_type_base_t* fmi2_xml_find_type_struct(fmi2_xml_variable_type_base_t* type, fmi2_xml_type_struct_kind_enu_t kind) {
    fmi2_xml_variable_type_base_t* typeBase = type;
    while(typeBase) {
        if(typeBase->structKind == kind) return typeBase;
        typeBase = typeBase->baseTypeStruct;
    }
    return 0;
}

static fmi2_xml_variable_type_base_t* fmi2_xml_find_type_props(fmi2_xml_variable_type_base_t* type) {
    fmi2_xml_variable_type_base_t* typeBase = type;
    while(typeBase) {
        if(typeBase->structKind == fmi2_xml_type_struct_enu_props) return typeBase;
        typeBase = typeBase->baseTypeStruct;
    }
    return 0;
}

struct fmi2_xml_type_definitions_t {
    jm_vector(jm_named_ptr) typeDefinitions;

    jm_string_set quantities;

    fmi2_xml_variable_type_base_t* typePropsList;

    fmi2_xml_real_type_props_t defaultRealType;
    fmi2_xml_enum_typedef_props_t defaultEnumType;
    fmi2_xml_integer_type_props_t defaultIntegerType;
    fmi2_xml_bool_type_props_t defaultBooleanType;
    fmi2_xml_string_type_props_t defaultStringType;
};

extern void fmi2_xml_init_type_definitions(fmi2_xml_type_definitions_t* td, jm_callbacks* cb) ;

extern void fmi2_xml_free_type_definitions_data(fmi2_xml_type_definitions_t* td);

extern void fmi2_xml_init_integer_typedef(fmi2_xml_integer_typedef_t* type);

extern void fmi2_xml_init_enum_typedef(fmi2_xml_enumeration_typedef_t* type, jm_callbacks* cb);

extern void fmi2_xml_free_enum_type(jm_named_ptr named);

fmi2_xml_variable_type_base_t* fmi2_xml_alloc_variable_type_props(fmi2_xml_type_definitions_t* td, fmi2_xml_variable_type_base_t* base, size_t typeSize);

fmi2_xml_variable_type_base_t* fmi2_xml_alloc_variable_type_start(fmi2_xml_type_definitions_t* td,fmi2_xml_variable_type_base_t* base, size_t typeSize);

fmi2_xml_real_type_props_t* fmi2_xml_parse_real_type_properties(fmi2_xml_parser_context_t* context, fmi2_xml_elm_enu_t elmID);

fmi2_xml_integer_type_props_t *fmi2_xml_parse_integer_type_properties(fmi2_xml_parser_context_t* context, fmi2_xml_elm_enu_t elmID);

extern int fmi2_check_last_elem_is_specific_type(fmi2_xml_parser_context_t *context);

extern jm_named_ptr fmi2_xml_variable_type_alloc(fmi2_xml_parser_context_t* context, jm_vector(char)* name, jm_vector(char)* description, size_t size);

extern void* fmi2_xml_variable_type_create(fmi2_xml_parser_context_t* context, size_t size, jm_vector(jm_named_ptr)* typeList );

extern fmi2_xml_real_typedef_t* fmi2_xml_variable_type_create_real(fmi2_xml_parser_context_t* context, fmi2_xml_elm_enu_t elmID, jm_vector(jm_named_ptr)* typeList );

extern fmi2_xml_integer_typedef_t* fmi2_xml_variable_type_create_integer(fmi2_xml_parser_context_t* context, fmi2_xml_elm_enu_t elmID, jm_vector(jm_named_ptr)* typeList );

fmi2_xml_variable_type_base_t* fmi2_get_declared_type(fmi2_xml_parser_context_t *context, fmi2_xml_elm_enu_t elmID, fmi2_xml_variable_type_base_t* defaultType);

#ifdef __cplusplus
}
#endif

#endif /* FMI2_XML_TYPEIMPL_H */