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

const print = std.debug.print;
const GPA = std.heap.GeneralPurposeAllocator(.{ .safety = true });

pub const Context = struct {
    const Self = @This();
    rundir: [:0]u8,
    gpa: GPA,

    pub fn init(gpa: *GPA) !Self {
        var rundir = try gpa.allocator().dupeZ(u8, "/tmp/libipc-run/");
        return Self{ .rundir = rundir, .gpa = gpa.* };
    }

    pub fn deinit(self: *Self) void {
        self.gpa.allocator().free(self.rundir);
    }
};

export fn ipc_context_init() callconv(.C) ?*anyopaque {
    std.log.err("Let's use GPA!", .{});
    var gpa = GPA{};
    var new_context = gpa.allocator().create(Context) catch return null;
    new_context.* = Context.init(&gpa) catch return null;
    return new_context;
}

export fn ipc_context_deinit(opaque_ctx: *anyopaque) callconv(.C) void {
    var ctx = @ptrCast(*Context, @alignCast(@alignOf(Context), opaque_ctx));
    ctx.deinit();
    var gpa = ctx.gpa; // save the gpa before destroying ctx
    std.log.err("Let's destroy Context!", .{});
    gpa.allocator().destroy(ctx);
    _ = gpa.deinit(); // now deinit the gpa
}

test "context_init_deinit" {
    const ctx = ipc_context_init();
    try std.testing.expect(ctx != null);

    ipc_context_deinit(ctx.?);
}