#ifndef BREEZE_UI_CORE_H
#define BREEZE_UI_CORE_H

#include "../defines.h"

#include <raylib.h>

typedef u32 BzUIFlags;
typedef u32 BzUIKey;

typedef enum BzUISizeKind {
    BZ_UI_SIZE_NULL,
    BZ_UI_SIZE_PIXELS,
    BZ_UI_SIZE_FIT,
    BZ_UI_SIZE_PARENT_PERCENT,
    BZ_UI_SIZE_CHILD_SUM,
    BZ_UI_SIZE_CHILD_MAX,
} BzUISizeKind;

typedef struct BzUISize {
    BzUISizeKind kind;
    f32 value;
} BzUISize;

typedef enum BzUILayoutType {
    BZ_UI_LAYOUT_NONE,
    BZ_UI_LAYOUT_UNIDIR,
    BZ_UI_LAYOUT_FLEX_BOX
} BzUILayoutType;

enum {
    // UNIDIRECTIONAL
    BZ_UI_UNIDIR_NONE   = 0,
    BZ_UI_UNIDIR_ROW    = (1 << 0),
    BZ_UI_UNIDIR_COLUMN = (1 << 1),
    BZ_UI_UNIDIR_WRAP   = (1 << 2),
    // FLEX BOX
    BZ_UI_FLEX_NONE                  = 0,
    BZ_UI_FLEX_DIR_ROW               = (1 << 0),
    BZ_UI_FLEX_DIR_COLUMN            = (1 << 1),
    BZ_UI_FLEX_ALIGN_START           = (1 << 2),
    BZ_UI_FLEX_ALIGN_CENTER          = (1 << 3),
    BZ_UI_FLEX_ALIGN_END             = (1 << 4),
    BZ_UI_FLEX_JUSTIFY_START         = (1 << 5),
    BZ_UI_FLEX_JUSTIFY_CENTER        = (1 << 6),
    BZ_UI_FLEX_JUSTIFY_END           = (1 << 7),
    BZ_UI_FLEX_JUSTIFY_SPACE_BETWEEN = (1 << 8),
    BZ_UI_FLEX_JUSTIFY_SPACE_AROUND  = (1 << 9),
    BZ_UI_FLEX_JUSTIFY_SPACE_EVENLY  = (1 << 10),
};

typedef struct BzUILayout {
    BzUILayoutType type;
    BzUIFlags      flags;
} BzUILayout;

typedef struct BzUIStyle {
    Font  font;
    f32   fontSize;
    f32   fontSpacing;
    f32   borderThickness;
    f32   roundness;
    Color textColor;
    Color textHoverColor;
    Color textActiveColor;
    Color bgColor;
    Color bgHoverColor;
    Color bgActiveColor;
    Color borderColor;
    Color borderHoverColor;
    Color borderActiveColor;
} BzUIStyle;



typedef enum BzUIAxis {
    BZ_UI_AXIS_X,
    BZ_UI_AXIS_Y,
    BZ_UI_AXIS_COUNT,
} BzUIAxis;

enum {
    BZ_UI_NONE               = 0,
    BZ_UI_CLICKABLE          = (1 << 0),
    BZ_UI_DRAW_TEXT          = (1 << 1),
    BZ_UI_DRAW_BORDER        = (1 << 2),
    BZ_UI_DRAW_BACKGROUND    = (1 << 3),
    //BZ_UI_DRAW_SPRITE        = (1 << 4),
    BZ_UI_ALIGN_HORIZ_START  = (1 << 5),
    BZ_UI_ALIGN_HORIZ_CENTER = (1 << 6),
    BZ_UI_ALIGN_HORIZ_END    = (1 << 7),
    BZ_UI_ALIGN_VERT_START   = (1 << 8),
    BZ_UI_ALIGN_VERT_CENTER  = (1 << 9),
    BZ_UI_ALIGN_VERT_END     = (1 << 10),

    BZ_UI_ALIGN_CENTER = BZ_UI_ALIGN_HORIZ_CENTER | BZ_UI_ALIGN_VERT_CENTER,
};


typedef struct BzUINode BzUINode;

typedef struct BzUIInteraction {
    bool pressed  : 1;
    bool down     : 1;
    bool released : 1;
    bool clicked  : 1;
    //bool dragging : 1;
    bool hovering : 1;
} BzUIInteraction;

typedef struct BzUI BzUI;

BzUIKey bzUIKeyNull();
BzUIKey bzUIKeyFromString(const char *str);

BzUI *bzUICreate();
void  bzUIDestroy(BzUI *ui);

void bzUIBegin(BzUI *ui, i32 width, i32 height);
void bzUIEnd(BzUI *ui);

BzUIKey bzUIGetUniqueKey(BzUI *ui);

BzUINode *bzUINodeMake(BzUI *ui, BzUIKey key, BzUIFlags flags);

BzUINode *bzUIPushParent(BzUI *ui, BzUINode *node);
BzUINode *bzUIPopParent(BzUI *ui);

void bzUISetParentLayout(BzUI *ui, BzUILayout layout);

BzUIInteraction bzUIGetInteraction(BzUI *ui, BzUINode *node);

bool bzUIButton(BzUI *ui, const char *string, BzUIStyle *style);

#endif //BREEZE_UI_CORE_H