use crate::cue_view::{CueView, CueViewMsg, CueViewOutput};
use crate::subtitle_selection_dialog::SubtitleSettings;
use crate::subtitles::state::CueAddress;
use gtk::prelude::*;
use relm4::prelude::*;

pub struct SubtitleView {
    primary_cue: Controller<CueView>,
    secondary_cue: Option<String>,
    machine_translation: Option<String>,
    show_secondary: bool,
    show_machine_translation: bool,
}

#[derive(Debug)]
pub enum SubtitleViewMsg {
    SetPrimaryCue(Option<CueAddress>),
    SetSecondaryCue(Option<CueAddress>),
    ApplySubtitleSettings(SubtitleSettings),
}

#[derive(Debug)]
pub enum SubtitleViewOutput {
    SetHoveringCue(bool),
}

#[relm4::component(pub)]
impl SimpleComponent for SubtitleView {
    type Init = ();
    type Input = SubtitleViewMsg;
    type Output = SubtitleViewOutput;

    view! {
        gtk::ScrolledWindow {
            gtk::Box {
                set_orientation: gtk::Orientation::Vertical,
                set_vexpand: true,
                set_halign: gtk::Align::Center,

                gtk::Box {
                    set_vexpand: true,
                },

                model.primary_cue.widget(),

                gtk::Box {
                    #[watch]
                    set_visible: model.show_secondary,
                    set_vexpand: true,
                },

                gtk::Label {
                    #[watch]
                    set_text: model.secondary_cue.as_ref().map(|val| val.as_str()).unwrap_or(""),
                    #[watch]
                    set_visible: model.show_secondary,
                    set_justify: gtk::Justification::Center,
                },

                gtk::Box {
                    #[watch]
                    set_visible: model.show_machine_translation,
                    set_vexpand: true,
                },

                gtk::Label {
                    #[watch]
                    set_text: model.machine_translation.as_ref().map(|val| val.as_str()).unwrap_or(""),
                    #[watch]
                    set_visible: model.show_machine_translation,
                    set_justify: gtk::Justification::Center,
                },

                gtk::Box {
                    set_vexpand: true,
                },
            }
        },
    }

    fn init(
        _init: Self::Init,
        root: Self::Root,
        sender: ComponentSender<Self>,
    ) -> ComponentParts<Self> {
        let model = Self {
            primary_cue: CueView::builder()
                .launch(())
                .forward(sender.output_sender(), |output| match output {
                    CueViewOutput::MouseEnter => SubtitleViewOutput::SetHoveringCue(true),
                    CueViewOutput::MouseLeave => SubtitleViewOutput::SetHoveringCue(false),
                }),
            secondary_cue: None,
            machine_translation: None,
            show_secondary: false,
            show_machine_translation: false,
        };

        let widgets = view_output!();

        ComponentParts { model, widgets }
    }

    fn update(&mut self, msg: Self::Input, _sender: ComponentSender<Self>) {
        match msg {
            SubtitleViewMsg::SetPrimaryCue(addr) => {
                self.primary_cue
                    .sender()
                    .send(CueViewMsg::SetCue(addr))
                    .unwrap();
                self.machine_translation = addr.and_then(|a| a.resolve_translation())
            }
            SubtitleViewMsg::SetSecondaryCue(addr) => {
                let text = addr.map(|addr| addr.resolve_text());
                self.secondary_cue = text;
            }
            SubtitleViewMsg::ApplySubtitleSettings(settings) => {
                self.show_secondary = settings.show_secondary;
                self.show_machine_translation = settings.show_machine_translation;
            }
        }
    }
}