#pragma once

#include "wm_types.h"

typedef struct wm_layout_window_ref_t {
  wm_window_id_t window_id;
  wm_window_geometry_mode_t geometry_mode;
} wm_layout_window_ref_t;

typedef struct wm_layout_ctx_t {
  wm_output_id_t output_id;
  wm_workspace_id_t workspace_id;
  wm_window_id_t focused_window_id;
  wm_rect_t workarea;
  const wm_layout_window_ref_t *windows;
  size_t window_count;
} wm_layout_ctx_t;

typedef struct wm_layout_item_t {
  wm_window_id_t window_id;
  wm_rect_t rect;  // 平铺窗口的目标外框矩形（包含边框）
} wm_layout_item_t;

typedef struct wm_layout_result_t {
  wm_layout_item_t *items;
  size_t item_count;
  size_t item_capacity;
} wm_layout_result_t;

typedef bool (*wm_layout_fn)(
  const wm_layout_ctx_t *ctx,
  wm_layout_result_t *out
);

typedef struct wm_layout_slot_t {
  wm_layout_id_t id;
  /*
   * 布局稳定名称，用于：
   * - 配置引用
   * - 日志输出
   * - 调试输出
   *
   * 推荐使用可读名字，如 "tile"、"monocle"、"floating"。
   */
  const char *name;
  /*
   * 布局符号，用于：
   * - 状态栏显示（应简短，如 "T", "M", "F"）
   * - 紧凑场景下的快速识别
   *
   * 推荐使用 1-2 个字符的简短标识符。
   */
  const char *symbol;
  wm_layout_fn fn;
} wm_layout_slot_t;

typedef struct wm_layout_registry_t {
  wm_layout_slot_t *slots;
  size_t slot_count;
  size_t slot_capacity;
} wm_layout_registry_t;

void wm_layout_result_init(wm_layout_result_t *result);
void wm_layout_result_reset(wm_layout_result_t *result);
void wm_layout_result_shutdown(wm_layout_result_t *result);

bool wm_layout_result_push(wm_layout_result_t *result, wm_layout_item_t item);

void wm_layout_registry_init(wm_layout_registry_t *registry);
void wm_layout_registry_shutdown(wm_layout_registry_t *registry);
size_t wm_layout_registry_count(const wm_layout_registry_t *registry);
const wm_layout_slot_t *
wm_layout_registry_at(const wm_layout_registry_t *registry, size_t index);

wm_layout_id_t wm_layout_register(
  wm_layout_registry_t *registry,
  const char *name,
  const char *symbol,
  wm_layout_fn fn
);
/*
 * layout registry 只允许在 bootstrap / 初始化阶段注册。
 * 运行时布局集合保持固定，只允许切换 workspace 当前选中的 layout_id。
 */
wm_layout_fn
wm_layout_lookup(const wm_layout_registry_t *registry, wm_layout_id_t id);
const wm_layout_slot_t *
wm_layout_slot_get(const wm_layout_registry_t *registry, wm_layout_id_t id);