#ifndef RENDER_UI_H
#define RENDER_UI_H

/* Minimal text overlay (SDL3_ttf). Draw last in the frame. */

#include <stdbool.h>
#include <SDL3_ttf/SDL_ttf.h>

#include "core/gl.h"

#define UI_TEXT_MAX 96
#define UI_LABELS   141

typedef enum {
    UI_TOP_LEFT,
    UI_TOP_RIGHT,
    UI_CENTER,
    UI_BOTTOM_LEFT,
} UiCorner;

/* One line of text with its own texture; only re-rendered when it changes. */
typedef struct {
    GLuint texture;
    int    width;
    int    height;
    char   text[UI_TEXT_MAX];
} UiLabel;

typedef struct {
    TTF_Font *font;
    bool      ttf_ready;
    GLuint    program;
    GLint     u_screen_size, u_tex, u_text_color, u_mode, u_rect_size, u_boil, u_rim;
    float     boil_time;
    GLuint    vao;
    GLuint    vbo;
    UiLabel   labels[UI_LABELS];
} Ui;

bool Ui_init(Ui *ui, const char *font_asset, float font_size);
void Ui_shutdown(Ui *ui);

/* Draws a line of text into a corner. label (0..UI_LABELS-1) picks the text slot. */
void Ui_drawText(Ui *ui, int label, const char *text, UiCorner corner, int screen_w, int screen_h);

/* Draws a line of a list down the left (UI_TOP_LEFT) or right side; line 0 is the top line.
   UI_BOTTOM_LEFT: a list up from the bottom left, line 0 the lowest, with a light halo. */
void Ui_drawTextLine(Ui *ui, int label, const char *text, int line, UiCorner side, int screen_w, int screen_h);

/* The animation clock: letters and patches boil with the pictures. */
void Ui_setTime(Ui *ui, float seconds);

/* Text with its left end at x, its bottom at y (pixels, y up), no halo. */
void Ui_drawTextLeft(Ui *ui, int label, const char *text, float x, float y, int screen_w, int screen_h);

/* A painted paper patch (pixels, y up): color and opacity, ink rim 0..1. */
void Ui_drawPatch(Ui *ui, float x, float y, float w, float h, float r, float g, float b, float a,
                  float rim, int screen_w, int screen_h);

/* Speech: text centered on x, its bottom at y (pixels, y up), with a light halo. */
void Ui_drawTextAt(Ui *ui, int label, const char *text, float x, float y, int screen_w, int screen_h);

#endif /* RENDER_UI_H */