#pragma once

// ============================================================================
// ui.h - 立即模式UI
// ============================================================================

#include <d3d11.h>
#include <stdint.h>

#define UI_MAX_VERTICES 16384
#define UI_MAX_INDICES  32768
#define UI_MAX_WIDGETS  256

typedef struct {
    float x, y;
    float u, v;
    uint32_t color;
} UIVertex;

typedef struct {
    float x, y, w, h;
    uint32_t color;
    int visible;
} UIRect;

typedef struct {
    ID3D11Buffer* vertex_buffer;
    ID3D11Buffer* index_buffer;
    ID3D11VertexShader* vertex_shader;
    ID3D11PixelShader* pixel_shader;
    ID3D11InputLayout* input_layout;
    ID3D11BlendState* blend_state;
    ID3D11RasterizerState* rasterizer;

    UIVertex vertices[UI_MAX_VERTICES];
    uint32_t indices[UI_MAX_INDICES];
    uint32_t vertex_count;
    uint32_t index_count;

    float mouse_x, mouse_y;
    int mouse_down;
    int mouse_pressed;
    int mouse_released;

    float font_size;
    uint32_t text_color;
    uint32_t bg_color;
    uint32_t border_color;
    float padding;
} UI;

// 创建/销毁
UI* ui_create(ID3D11Device* device);
void ui_destroy(UI* ui);

// 帧操作
void ui_begin(UI* ui, float mouse_x, float mouse_y, int mouse_down, int mouse_pressed, int mouse_released);
void ui_end(UI* ui);
void ui_render(UI* ui, ID3D11DeviceContext* ctx);

// 基础绘制
void ui_draw_rect(UI* ui, float x, float y, float w, float h, uint32_t color);
void ui_draw_rect_border(UI* ui, float x, float y, float w, float h, uint32_t fill, uint32_t border, float thickness);

// 控件
int ui_button(UI* ui, float x, float y, float w, float h, const char* text);
float ui_slider(UI* ui, float x, float y, float w, float h, float value, float min_val, float max_val);
int ui_checkbox(UI* ui, float x, float y, const char* text, int checked);
void ui_label(UI* ui, float x, float y, const char* text);