#ifndef CLAY_PROPERTY_H
#define CLAY_PROPERTY_H

#include "clay.h"
#include "clay-list.h"
#include "clay-map.h"

CLAY_STRING_MAP_TYPE(clay_prop_keyword_map, int)

typedef struct clay_prop_val_s clay_prop_val;

CLAY_LIST_TYPE(clay_prop_vals, clay_prop_val)

typedef struct clay_prop_s clay_prop;

typedef struct clay_prop_definition_s clay_prop_definition;

typedef struct clay_prop_definition_in_s clay_prop_definition_in;


#include "layout.h"


struct clay_prop_s {
    clay_prop_vals_const values;
    int inheritance_level;
} ;

CLAY_STRING_MAP_TYPE(clay_property_map, clay_prop_vals)
CLAY_STRING_MAP_TYPE(clay_prop_map, clay_prop)

struct clay_t {
    clay_ctx ctx;
    clay_layout_class class;
    clay_property_map properties;
    clay parent;
    clay_layout_list children;
};


enum clay_prop_val_type {
    CLAY_PROP_TYPE_KEYWORD,
    CLAY_PROP_TYPE_NUMBER,
    CLAY_PROP_TYPE_COLOR,
    CLAY_PROP_TYPE_STRING
};

enum clay_prop_val_number_type {
    CLAY_PROP_NUMBER_INT,
    CLAY_PROP_NUMBER_FLOAT,
};


typedef enum {
    CLAY_PROP_UNIT_NONE = 1,
    CLAY_PROP_UNIT_PX = 2,
    CLAY_PROP_UNIT_PT = 4,
    CLAY_PROP_UNIT_CM = 8,
    CLAY_PROP_UNIT_MM = 16,
    CLAY_PROP_UNIT_PERCENT = 32,
} clay_prop_val_unit;

#define CLAY_PROP_UNIT_ABSOLUTE (CLAY_PROP_UNIT_PT | CLAY_PROP_UNIT_CM | CLAY_PROP_UNIT_MM)
#define CLAY_PROP_UNIT_ANY_UNIT (CLAY_PROP_UNIT_PX | CLAY_PROP_UNIT_PT | CLAY_PROP_UNIT_CM | CLAY_PROP_UNIT_MM | CLAY_PROP_UNIT_PERCENT)
#define CLAY_PROP_UNIT_ANY (CLAY_PROP_UNIT_NONE | CLAY_PROP_UNIT_ANY_UNIT)

struct clay_prop_val_number {
    enum clay_prop_val_number_type type;
    clay_prop_val_unit unit;
    union {
        int64_t value_int;
        double value_double;
    };
};

struct clay_prop_val_s {
    enum clay_prop_val_type type;
    union {
        int keyword;
        struct clay_prop_val_number number;
        clay_color color;
        const char *string;
    };
};

struct clay_prop_definition_s {
    bool allow_int;
    bool allow_float;
    bool allow_string;
    clay_prop_val_unit allow_units;
    bool allow_color;
    clay_prop_keyword_map keywords;
    int max_values;
    bool inherits;
    bool global;
};


struct clay_prop_keyword_map_entry_in {
    const char *keyword;
    int value;
};

struct clay_prop_keyword_map_in {
    struct clay_prop_keyword_map_entry_in *entries;
    size_t num_entries;
};

struct clay_prop_definition_in_s {
    bool allow_int;
    bool allow_string;
    bool allow_float;
    clay_prop_val_unit allow_units;
    bool allow_color;
    struct clay_prop_keyword_map_in keywords;
    int max_values;
    bool inherits;
} ;


#define CLAY_PP_NARG(...) \
         CLAY_PP_NARG_(__VA_ARGS__,CLAY_PP_RSEQ_N())
#define CLAY_PP_NARG_(...) \
         CLAY_PP_ARG_N(__VA_ARGS__)
#define CLAY_PP_ARG_N(\
          _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, \
         _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, \
         _21, _22, _23, _24, _25, _26, _27, _28, _29, _30, \
         _31, _32, _33, _34, _35, _36, _37, _38, _39, _40, \
         _41, _42, _43, _44, _45, _46, _47, _48, _49, _50, \
         _51, _52, _53, _54, _55, _56, _57, _58, _59, _60, \
         _61, _62, _63, N, ...) N
#define CLAY_PP_RSEQ_N() \
         63,62,61,60,                   \
         59,58,57,56,55,54,53,52,51,50, \
         49,48,47,46,45,44,43,42,41,40, \
         39,38,37,36,35,34,33,32,31,30, \
         29,28,27,26,25,24,23,22,21,20, \
         19,18,17,16,15,14,13,12,11,10, \
         9,8,7,6,5,4,3,2,1,0

#define CLAY_PROP_DEF_KEYWORD(k, v) {.keyword = k, .value = v}
#define CLAY_PROP_DEF_KEYWORDS(...) (struct clay_prop_keyword_map_in) { \
    .entries = (struct clay_prop_keyword_map_entry_in[]) { \
        __VA_ARGS__ \
    }, \
    .num_entries = CLAY_PP_NARG(__VA_ARGS__)/2 \
}


clay_prop clay_layout_get_property(clay layout, const char *prop_name);


/*
 * this function allocates a clay_property_map, make sure to free it with clay_map_destroy
 * the values in the returned map are pointers to the actual property values and should not be modified
 */
clay_prop_map clay_layout_get_properties(clay layout);


#endif //CLAY_PROPERTY_H