#include <raylib.h>
#include <stddef.h>
#include "../scenes/scenes.h"

#ifndef UI_ELEMENTS_H
#define UI_ELEMENTS_H

static const float ROUNDNESS = 0.015f;
static const int ROUNDNESS_SEGMENTS = 8;

static const float SCROLL_SENC = 10;
static const float TAB_WIDTH = 4;
static const int PADDING = 10;

static const int HEADER_FONT_SIZE = 50;
static const int EDITOR_PADDING = 3;
static const int BORDER = 2;
static const int FOOTER_HEIGHT = 30;

// Sure about this value
static const int MIN_FONT_SIZE = 10;
// Unsure about this value
static const int MAX_FONT_SIZE = 100;

void DrawRecBordered(Rectangle rec, Color bg, Color border_color, int border_width);
void DrawTextInRec(Rectangle rec, char *text, Font *font, int height, Color color, float padding, int *scroll);
float MeasureChar(Font *font, int height, char symbol);
bool IsMouseInRec(Rectangle rec);

// ========== BUTTON ==========

typedef struct {
    Scene *parent;
    void *userData;
    void (*OnClick)(Scene *);
    Texture *atlas;
    Rectangle textrueLocation;
    Rectangle previousFramePosition;
} Button;

void UpdateButton(Button *btn);
void DrawButton(Button *btn, Rectangle *location);

// ========== PAGE VIEW ==========

static const int PAGE_DOTS_SPACING = 15;
static const int PAGE_DOTS_PADDING = 15;
static const int PAGE_DOTS_RADIUS = 3;
static const char PAGE_DOTS_TRANSPARENCY = (char)192;

/// Draws the little dots that represent the page you are on
void DrawPageView(int y, unsigned int pages, unsigned int current_page);

// ========== TEXT EDITOR ==========

static const size_t DEFAULT_TEXT_NODE_SIZE = 256;

typedef struct {
    void *PrevNode;
    void *NextNode;

    char *text;
    size_t len;
    size_t cap;
} TextNode;


typedef struct {
    Font *font;
    int font_size;
    int spacing;

    int scroll_h;
    int scroll_v;

    /// DO NOT MODIFY THAT! It's for internal use only
    int _area_width;
    /// DO NOT MODIFY THAT! It's for internal use only
    int _area_height;
} TextAreaDisplayParams;

typedef struct {
    TextNode *StartNode;
    /// For the quick access
    TextNode *CurrentNode;
    size_t NodeLenth;

    Vector2 CursorPosition;
    TextAreaDisplayParams *DisplayParams;
} TextArea;

TextArea *CreateTextArea(TextAreaDisplayParams *DisplayParams);
TextArea *CreateTextAreaFromText(TextAreaDisplayParams *DisplayParams, char *text);

void DrawTextArea(TextArea *ta, Rectangle rec);
void UpdateTextArea(TextArea *ta, Rectangle rec);

char *GetText(TextArea *ta);
void FreeTextArea(TextArea *ta);

/// Fills pane1 and pane2 with the panes location
/// proporion_h and proportion_v are the scale ratio of the panes in horizontal
/// and vertical orientation
void GetPanesSplit(Rectangle *pane1, Rectangle *pane2, Rectangle body, float proportion_h, float proportion_v);

#endif // UI_ELEMENTS_H