const std = @import("std");
const wayland = @import("root.zig");

const Self = @This();

pub const Ref = usize;

const VTable = struct {
    on_event: *const fn (ptr: *anyopaque, ctx: *wayland.Context, opcode: u16, args: []const u8) void,
};

ptr: ?*anyopaque,
vtable: VTable,

pub inline fn on_event(self: *Self, ctx: *wayland.Context, opcode: u16, args: []const u8) !void {
    if (self.ptr) |ptr| {
        self.vtable.on_event(ptr, ctx, opcode, args);
    } else {
        return error.UseAfterRelease;
    }
}

pub inline fn from_self(ptr: anytype) Self {
    return .{
        .ptr = ptr,
        .vtable = VTable{
            .on_event = @TypeOf(ptr.*).Events.on_event,
        },
    };
}

pub fn disable(self: *Self) void {
    self.ptr = null;
}

pub fn format(
    self: *const Self,
    comptime fmt: []const u8,
    options: std.fmt.FormatOptions,
    writer: anytype,
) !void {
    _ = fmt;
    _ = options;

    try writer.print("Object {{ {?} }}", .{self.ptr});
}