/* skykit.h — OrionOS native UI toolkit
 * Shared palette, drawing utilities, and app boilerplate used by all OrionOS
 * shell components (Rigel, Nebula, OrionPkg, installer, etc.).
 */
#pragma once

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <X11/Xft/Xft.h>
#include <fontconfig/fontconfig.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>

/* ── Palette ─────────────────────────────────────────────────────── */
#define SK_BG         0x0E1220UL
#define SK_SURFACE    0x141828UL
#define SK_SIDEBAR    0x090D1AUL
#define SK_PANEL      0x111828UL
#define SK_BORDER     0x1A2840UL
#define SK_SEP        0x162030UL
#define SK_ACCENT     0x1E58A8UL
#define SK_ACCENT_HOV 0x2A70CCUL
#define SK_BTN        0x182848UL
#define SK_BTN_HOV    0x1E3860UL
#define SK_SEL        0x1A3058UL
#define SK_ROW_ALT    0x0C1520UL
#define SK_ROW_HOV    0x132030UL
#define SK_TEXT       0xC8D4E8UL
#define SK_TEXT_HDR   0xE8F4FFUL
#define SK_TEXT_DIM   0x5A6880UL
#define SK_TEXT_HOV   0xF0F8FFUL
#define SK_TEXT_OK    0x44BB77UL
#define SK_TEXT_ERR   0xFF5555UL
#define SK_TEXT_WARN  0xFFCC44UL

/* ── Standard fonts ──────────────────────────────────────────────── */
#define SK_FONT_UI   "Sans:size=9"
#define SK_FONT_SM   "Sans:size=8"
#define SK_FONT_HDR  "Sans:size=10:weight=bold"
#define SK_FONT_MONO "DejaVu Sans Mono:size=8"

/* ── App context (one per process) ──────────────────────────────── */
typedef struct {
    Display  *dpy;
    int       screen;
    Window    root;
    Visual   *vis;
    Colormap  cmap;
    int       depth;
    XftFont  *font_ui;
    XftFont  *font_sm;
    XftFont  *font_hdr;
    XftFont  *font_mono;
} SKApp;

/* ── Painter (per-window drawing context) ────────────────────────── */
typedef struct {
    SKApp    *app;
    Drawable  drw;
    GC        gc;
} SKPainter;

/* ── Simple button descriptor ────────────────────────────────────── */
typedef struct {
    int         x, y, w, h;
    const char *label;
    int         id;
} SKBtn;

/* ── API ─────────────────────────────────────────────────────────── */
void          sk_app_init  (SKApp *app);
void          sk_app_free  (SKApp *app);

unsigned long sk_color     (SKApp *app, unsigned long rgb);
void          sk_xft_color (SKApp *app, unsigned long rgb, XftColor *out);

void sk_fill        (SKPainter *p, unsigned long rgb, int x, int y, int w, int h);
void sk_rect        (SKPainter *p, unsigned long rgb, int x, int y, int w, int h);
void sk_line        (SKPainter *p, unsigned long rgb, int x1, int y1, int x2, int y2);
void sk_text        (SKPainter *p, XftFont *font, unsigned long rgb, int x, int y, const char *s);
void sk_text_clip   (SKPainter *p, XftFont *font, unsigned long rgb, int x, int y,
                     const char *s, int cx, int cy, int cw, int ch);
int  sk_textw       (SKApp *app, XftFont *font, const char *s);
int  sk_baseline    (XftFont *font, int y, int h);
int  sk_in_rect     (int mx, int my, int x, int y, int w, int h);

void sk_draw_btn    (SKPainter *p, SKApp *app, XftFont *font, const SKBtn *b,
                     int hovered, unsigned long bg, unsigned long bghov);