const ext = @cImport({
    @cInclude("SDL2/SDL.h");
});

const io = @import("./io.zig");
const stack = @import("./stack.zig");
const std = @import("std");
const sys = @import("./sys.zig");

///
/// Entry point.
///
pub fn main() anyerror!void {
    return sys.runGraphics(anyerror, run);
}

test {
    _ = @import("./mem.zig");
}

fn run(event_loop: *sys.EventLoop, graphics: *sys.GraphicsContext) anyerror!void {
    var gpa = std.heap.GeneralPurposeAllocator(.{}){};

    defer _ = gpa.deinit();

    {
        const file_access = try event_loop.open(.readonly,
            try sys.FileSystem.data.joinedPath(&.{"data", "ona.lua"}));

        defer _ = event_loop.close(file_access);

        const file_size = try file_access.size(event_loop);
        const allocator = gpa.allocator();
        const buffer = try allocator.alloc(u8, file_size);

        defer allocator.free(buffer);

        if ((try event_loop.readFile(file_access, buffer)) != file_size)
            return error.ScriptLoadFailure;

        event_loop.log(buffer);
    }

    while (graphics.poll()) |_| {
        graphics.present();
    }
}