#pragma once
// ui_core.h - Thin wrapper around Clay (https://github.com/nicbarker/clay)
// Provides Clay initialization, per-frame lifecycle, and text measurement bridging.

#include "base/base_inc.h"
#include "clay.h"

////////////////////////////////
// Text measurement callback (provided by renderer)
// This is our app-level callback; we adapt it to Clay's signature internally.

typedef Vec2F32 (*UI_MeasureTextFn)(const char *text, S32 length, F32 font_size, void *user_data);

////////////////////////////////
// UI Context

struct UI_Context {
    Clay_Context  *clay_ctx;
    void          *clay_memory;

    // Text measurement
    UI_MeasureTextFn measure_text_fn;
    void            *measure_text_user_data;
};

////////////////////////////////
// Lifecycle

UI_Context *ui_create(F32 viewport_w, F32 viewport_h);
void        ui_destroy(UI_Context *ctx);

// Call each frame before declaring layout
void ui_begin_frame(UI_Context *ctx, F32 viewport_w, F32 viewport_h,
                    Vec2F32 mouse_pos, B32 mouse_down,
                    Vec2F32 scroll_delta, F32 dt);

// Call after layout is declared; returns Clay's render command array
Clay_RenderCommandArray ui_end_frame(UI_Context *ctx);

////////////////////////////////
// Text measurement

void ui_set_measure_text_fn(UI_Context *ctx, UI_MeasureTextFn fn, void *user_data);

////////////////////////////////
// Theme colors (convenience - 0-255 Clay_Color)

struct UI_Theme {
    Clay_Color bg_dark;
    Clay_Color bg_medium;
    Clay_Color bg_light;
    Clay_Color bg_lighter;
    Clay_Color border;
    Clay_Color text;
    Clay_Color text_dim;
    Clay_Color accent;
    Clay_Color accent_hover;
    Clay_Color title_bar;
    Clay_Color scrollbar_bg;
    Clay_Color scrollbar_grab;
};

extern UI_Theme g_theme;

void ui_init_theme();