const gpu = @import("gpu");
const enums = @import("enums.zig");

pub const Size = struct {
    width: u32,
    height: u32,
};

pub const SizeOptional = struct {
    width: ?u32,
    height: ?u32,
};

/// Application options that can be configured at init time.
pub const StartupOptions = struct {};

/// Application options that can be configured at run time.
pub const Options = struct {
    /// The title of the window.
    title: [*:0]const u8 = "Mach engine",

    /// The width of the window.
    width: u32 = 640,

    /// The height of the window.
    height: u32 = 480,

    /// The minimum allowed size for the window.
    size_min: SizeOptional = .{ .width = null, .height = null },

    /// The maximum allowed size for the window.
    size_max: SizeOptional = .{ .width = null, .height = null },

    /// Monitor synchronization modes.
    vsync: enums.VSyncMode = .double,

    /// GPU features required by the application.
    required_features: ?[]gpu.Feature = null,

    /// GPU limits required by the application.
    required_limits: ?gpu.Limits = null,

    /// Whether the application has a preference for low power or high performance GPU.
    power_preference: gpu.PowerPreference = .none,
};

pub const Event = union(enum) {
    key_press: struct {
        key: enums.Key,
    },
    key_release: struct {
        key: enums.Key,
    },
    mouse_motion: struct {
        // These are in window coordinates (not framebuffer coords)
        x: f64,
        y: f64,
    },
    mouse_press: struct {
        button: enums.MouseButton,
    },
    mouse_release: struct {
        button: enums.MouseButton,
    },
    mouse_scroll: struct {
        xoffset: f32,
        yoffset: f32,
    },
};