const std = @import("std");
const expect = std.testing.expect;

pub fn Vec3(comptime T: type) type {
    return struct {
        const Self = @This();
        x: T,
        y: T,
        z: T,
        pub fn init(this: *Self, x: T, y: T, z: T) void {
            this.x = x;
            this.y = y;
            this.z = z;
        }
        
        pub fn print(this: Self) !void {
            const writer = std.io.getStdOut().writer();
            try writer.print("({d}, {d}, {d})", .{this.x, this.y, this.x});
        }
        
        pub fn add(this: *Self, other: Self) void {
            this.x = this.x + other.x;
            this.y = this.y + other.y;
            this.z = this.z + other.z;
        }

        pub fn sub(this: *Self, other: Self) void {
            this.x = this.x - other.x;
            this.y = this.y - other.y;
            this.z = this.z - other.z;
        }

        pub fn mul(this: *Self, scal: T) void {
            this.x = this.x * scal;
            this.y = this.y * scal;
            this.z = this.z * scal;
        }

        pub fn prod(this: Self, other: Self) T {
            return (this.x * other.x) + (this.y * other.y) + (this.z * other.z);
        }

        pub fn comp(this: Self, other: Self) bool {
            return 
            (this.x == other.x) and
            (this.y == other.y) and
            (this.z == other.z);
        }
    };
}

pub fn main() !void {
    const writer = std.io.getStdOut().writer();
    const myType = Vec3(64);
    const vec3: myType = undefined;

    vec3.init(1, 1, 1);

    var vec1: Vec3(u64) = undefined;
    var vec2: Vec3(u64) = undefined;
    vec1.init(2, 4, 3);

    vec2.init(1, 1, 1);

    try vec1.print();
    try writer.print(" + ", .{});
    try vec2.print();
    vec1.add(vec2);
    try writer.print(" = ", .{});
    try vec1.print();

    try writer.print("vec1.x: {d} \n", .{vec1.x});
}