const std = @import("std");
const Allocator = std.mem.Allocator;

const glib = @import("glib");

const apprt = @import("../../../apprt.zig");
const DBus = @import("DBus.zig");

// Use a D-Bus method call to open a new window on GTK.
// See: https://wiki.gnome.org/Projects/GLib/GApplication/DBusAPI
//
// `ghostty +new-window` is equivalent to the following command (on a release build):
//
// ```
// gdbus call --session --dest com.mitchellh.ghostty --object-path /com/mitchellh/ghostty --method org.gtk.Actions.Activate new-window [] []
// ```
//
// `ghostty +new-window -e echo hello` would be equivalent to the following command (on a release build):
//
// ```
// gdbus call --session --dest com.mitchellh.ghostty --object-path /com/mitchellh/ghostty --method org.gtk.Actions.Activate new-window-command '[<@as ["-e" "echo" "hello"]>]' []
// ```
pub fn newWindow(alloc: Allocator, target: apprt.ipc.Target, value: apprt.ipc.Action.NewWindow) (Allocator.Error || std.Io.Writer.Error || apprt.ipc.Errors)!bool {
    var dbus = try DBus.init(
        alloc,
        target,
        if (value.arguments == null)
            "new-window"
        else
            "new-window-command",
    );
    defer dbus.deinit(alloc);

    if (value.arguments) |arguments| {
        // If any arguments were specified on the command line, the first
        // parameter is an array of strings that contain the arguments. They
        // will be sent to the main Ghostty instance and interpreted as CLI
        // arguments.
        const as_variant_type = glib.VariantType.new("as");
        defer as_variant_type.free();

        const s_variant_type = glib.VariantType.new("s");
        defer s_variant_type.free();

        var command: glib.VariantBuilder = undefined;
        command.init(as_variant_type);
        errdefer command.clear();

        for (arguments) |argument| {
            const bytes = glib.Bytes.new(argument.ptr, argument.len + 1);
            defer bytes.unref();
            const string = glib.Variant.newFromBytes(s_variant_type, bytes, @intFromBool(true));
            command.addValue(string);
        }

        dbus.addParameter(command.end());
    }

    try dbus.send();

    return true;
}