const std = @import("std");
const vk = @import("vulkan");
const c = @import("c.zig");
const GraphicsContext = @import("graphics_context.zig").GraphicsContext;

const BaseDispatch = struct {
    vkCreateInstance: vk.PfnCreateInstance,
    usingnamespace vk.BaseWrapper(@This());
};

const InstanceDispatch = struct {
    vkDestroyInstance: vk.PfnDestroyInstance,
    vkCreateDevice: vk.PfnCreateDevice,
    vkDestroySurfaceKHR: vk.PfnDestroySurfaceKHR,
    usingnamespace vk.InstanceWrapper(@This());
};

const DeviceDispatch = struct {
    vkDestroyDevice: vk.PfnDestroyDevice,
    usingnamespace vk.DeviceWrapper(@This());
};

const app_name = "vulkan-zig example";

const app_info = vk.ApplicationInfo{
    .p_application_name = app_name,
    .application_version = vk.makeVersion(0, 0, 0),
    .p_engine_name = app_name,
    .engine_version = vk.makeVersion(0, 0, 0),
    .api_version = vk.API_VERSION_1_2,
};

pub fn main() !void {
    if (c.glfwInit() != c.GLFW_TRUE) return error.GlfwInitFailed;
    defer c.glfwTerminate();

    const dim = vk.Extent2D{.width = 800, .height = 600};

    c.glfwWindowHint(c.GLFW_CLIENT_API, c.GLFW_NO_API);
    const window = c.glfwCreateWindow(
        dim.width,
        dim.height,
        app_name,
        null,
        null
    ) orelse return error.WindowInitFailed;
    defer c.glfwDestroyWindow(window);

    const gc = try GraphicsContext.init(std.heap.page_allocator, &app_info, window);
    defer gc.deinit();
}