const std = @import("std");
const log = std.log.scoped(.imgui);

const ImGui = @This();

const Command = union(enum) {
    text: [:0]const u8
};

arena_state: std.heap.ArenaAllocator,
commands: std.ArrayList(Command),

pub fn init(gpa: std.mem.Allocator) ImGui {
    return ImGui{
        .arena_state = .init(gpa),
        .commands = .empty
    };
}

pub fn deinit(self: *ImGui) void {
    self.arena_state.deinit();
    self.* = undefined;
}

pub fn text(self: *ImGui, comptime fmt: []const u8, args: anytype) void {
    const arena = self.arena_state.allocator();

    const formatted = std.fmt.allocPrintSentinel(arena, fmt, args, 0) catch |e| {
        log.warn("formatting text failed: {}", .{e});
        return;
    };

    self.commands.append(arena, .{ .text = formatted }) catch |e| {
        log.warn("appending command failed: {}", .{e});
        return;
    };
}