#ifndef UI_MANAGER_H
#define UI_MANAGER_H

#include <stdbool.h>
#include <stdint.h>

#include "ha_data.h"
#include "lvgl.h"

/*
 * The screen layout.
 *
 * This file is compiled into the desktop simulator as well as the firmware
 * (see sim/README.md), so it must never touch a driver, a socket or ESP-IDF
 * directly. Data arrives as ha_data_t; commands leave through the callback
 * below. Everything in between is drawing.
 */

void ui_init(void);

/* Safe to call from any task -- these take the LVGL lock internally. */

/* Redraw every panel from `data`. Cheap to call when nothing changed: every
 * label goes through a comparison first, so an unchanged value costs no
 * invalidation and therefore no flush. */
void ui_update(const ha_data_t *data);

void ui_set_status(const char *status);

/*
 * Mark the displayed readings as no longer trustworthy. Dims the temperature
 * so a value that stopped updating is visibly distinct from a live one,
 * rather than sitting there at full styling looking current.
 */
void ui_set_stale(bool stale);

/*
 * Called when the user operates a light tile.
 *
 * `index` indexes HA_LIGHTS. `brightness` is 0-255, or -1 for a plain on/off
 * with no brightness change (a tile tap, or any switch-domain entity).
 *
 * Runs on the LVGL task with the LVGL lock held, so the implementation must
 * not block: hand the command to another task rather than doing HTTP here.
 */
typedef void (*ui_light_cmd_cb_t)(int index, bool on, int16_t brightness);
void ui_set_light_cb(ui_light_cmd_cb_t cb);

#endif