use crate::*;
use std::sync::Arc;

#[test]
fn test_lv2_ui () {
    let mut features = [];
    std::mem::forget(features);
    //gtk::init().unwrap();
    use gtk::prelude::{ApplicationExt, ApplicationExtManual};
    let app = gtk::Application::builder().application_id("lol.tek").build();
    app.connect_activate(move |app| {
        let host = Host::new();
        let mut plugin = plugin::LV2Plugin::new("file:///home/user/.lv2/Odin2.lv2").unwrap();
        //let mut plugin = plugin::LV2Plugin::new("file:///home/user/.lv2/ChowKick.lv2").unwrap();
        for ui in plugin.plugin.raw().uis().unwrap().iter() {
            println!("{:?}", ui.uri());
            println!("{:?}", ui.classes());
        }
        let handle = plugin.instance.raw_mut().instance_mut().handle();
        let instance_access = crate::bound::LV2_Feature {
            URI:  std::ffi::CString::new("http://lv2plug.in/ns/ext/instance-access").unwrap().into_raw(),
            data: handle as *mut _ as *mut std::ffi::c_void
        };
        let ui_instance = Arc::new(host.instance(
            &mut plugin,
            "http://lv2plug.in/ns/extensions/ui#Gtk3UI",
            "https://thewavewarden.com/odin2",
            "https://thewavewarden.com/odin2#ParentUI",
            "http://lv2plug.in/ns/extensions/ui#X11UI",
            "/home/user/.lv2/Odin2.lv2/Odin2.so",
            "/home/user/.lv2/Odin2.lv2/Odin2.so",
            &features,
        ).unwrap());
        //let instance = Arc::new(host.instance(
            //&mut plugin,
            //"http://lv2plug.in/ns/extensions/ui#Gtk3UI",
            //"http://tytel.org/helm",
            //"http://tytel.org/helm#ParentUI",
            //"http://lv2plug.in/ns/extensions/ui#X11UI",
            //"/home/user/.lv2/Helm.lv2/helm.so",
            //"/home/user/.lv2/Helm.lv2/helm.so",
            //&features,
        //).unwrap());
        //let instance = Arc::new(host.instance(
            //&mut plugin,
            //"http://lv2plug.in/ns/extensions/ui#Gtk3UI",
            //"http://github.com/Chowdhury-DSP/ChowKick",
            //"http://github.com/Chowdhury-DSP/ChowKick:UI",
            //"http://lv2plug.in/ns/extensions/ui#X11UI",
            //"/home/user/.lv2/ChowKick.lv2/libChowKick.so",
            //"/home/user/.lv2/ChowKick.lv2/libChowKick.so",
            //&features,
        //).unwrap());
        //println!("{:?}", instance.get_widget());
    });
    app.run();
    //self::ui::UI::run(&instance).join();
}

mod ui {
    use std::sync::Arc;
    use std::thread::{spawn, JoinHandle};
    use ::winit::{
        application::ApplicationHandler,
        event::WindowEvent,
        event_loop::{ActiveEventLoop, ControlFlow, EventLoop},
        window::{Window, WindowId},
        platform::x11::EventLoopBuilderExtX11
    };
    use crate::{Host, Instance};
    pub struct UI {
        host: Arc<Instance>,
        window: Option<Window>
    }
    impl UI {
        pub fn new (host: &Arc<Instance>) -> Self {
            Self {
                host: host.clone(),
                window: None
            }
        }
        pub fn run (host: &Arc<Instance>) -> JoinHandle<()> {
            let mut ui = Self::new(host);
            spawn(move||{
                let event_loop = EventLoop::builder().with_x11().with_any_thread(true).build().unwrap();
                event_loop.set_control_flow(ControlFlow::Wait);
                event_loop.run_app(&mut ui).unwrap()
            })
        }
    }
    impl ApplicationHandler for UI {
        fn resumed (&mut self, event_loop: &ActiveEventLoop) {
            self.window = Some(event_loop.create_window(Window::default_attributes()).unwrap());
        }
        fn window_event (&mut self, event_loop: &ActiveEventLoop, id: WindowId, event: WindowEvent) {
            match event {
                WindowEvent::CloseRequested => {
                    self.window.as_ref().unwrap().set_visible(false);
                    event_loop.exit();
                },
                WindowEvent::RedrawRequested => {
                    self.window.as_ref().unwrap().request_redraw();
                }
                _ => (),
            }
        }
    }
}

mod plugin {
    use std::thread::JoinHandle;
    use std::sync::Arc;
    use ::livi::{
        World,
        Instance,
        Plugin as LiviPlugin,
        Features,
        FeaturesBuilder,
        Port,
        event::LV2AtomSequence,
    };
    /// A LV2 plugin.
    pub struct LV2Plugin {
        pub world:        World,
        pub instance:     Instance,
        pub plugin:       LiviPlugin,
        pub features:     Arc<Features>,
        pub port_list:    Vec<Port>,
        pub input_buffer: Vec<LV2AtomSequence>,
        pub ui_thread:    Option<JoinHandle<()>>,
    }

    impl LV2Plugin {
        pub fn new (uri: &str) -> Result<Self, Box<dyn std::error::Error>> {
            // Get 1st plugin at URI
            let world    = World::with_load_bundle(&uri);
            let features = FeaturesBuilder { min_block_length: 1, max_block_length: 65536 };
            let features = world.build_features(features);
            let mut plugin = None;
            #[allow(clippy::never_loop)]
            for p in world.iter_plugins() {
                plugin = Some(p);
                break
            }
            if plugin.is_none() {
                return Err(format!("plugin not found: {uri}").into())
            }
            let plugin = plugin.unwrap();
            let err = &format!("init {uri}");

            // Instantiate
            Ok(Self {
                world,
                instance: unsafe {
                    plugin
                        .instantiate(features.clone(), 48000.0)
                        .expect(&err)
                },
                port_list: {
                    let mut port_list = vec![];
                    for port in plugin.ports() {
                        port_list.push(port);
                    }
                    port_list
                },
                plugin,
                features,
                input_buffer: Vec::with_capacity(1024),
                ui_thread: None
            })
        }
    }
}