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pub mod jmbl_view;
pub mod value;

use std::convert::TryInto;

use crate::{
    list::list_view::ListView, map::map_view::MapView, object::AnyObjectState, ops::ObjID,
    text::text_view::TextView,
};

use jmbl_view::JMBLViewRef;
use value::ValueError;

#[derive(Debug, PartialEq, Eq, Hash, Clone)]
pub enum ObjView {
    List(ListView),
    Text(TextView),
    Map(MapView),
}

impl ObjView {
    pub(crate) fn new_for(obj: &AnyObjectState, obj_id: ObjID, ctx: JMBLViewRef) -> Self {
        match obj {
            AnyObjectState::List(_) => ObjView::List(ListView::new(obj_id, ctx)),
            AnyObjectState::Text(_) => ObjView::Text(TextView::new(obj_id, ctx)),
            AnyObjectState::Map(_) => ObjView::Map(MapView::new(obj_id, ctx)),
        }
    }

    pub(crate) fn get_obj_id(&self) -> ObjID {
        match self {
            ObjView::List(ref list_view) => list_view.obj_id,
            _ => todo!("Not yet implemented"),
        }
    }

    pub fn to_litl(&self) -> litl::Val {
        match self {
            ObjView::List(list_view) => list_view.to_litl(),
            ObjView::Text(text_view) => text_view.to_litl(),
            ObjView::Map(map_view) => map_view.to_litl(),
        }
    }

    pub fn if_map(&self) -> Result<&MapView, ValueError> {
        self.try_into()
    }

    pub fn if_list(&self) -> Result<&ListView, ValueError> {
        self.try_into()
    }

    pub fn if_text(&self) -> Result<&TextView, ValueError> {
        self.try_into()
    }

    pub fn if_map_mut(&mut self) -> Result<&mut MapView, ValueError> {
        self.try_into()
    }

    pub fn if_list_mut(&mut self) -> Result<&mut ListView, ValueError> {
        self.try_into()
    }

    pub fn if_text_mut(&mut self) -> Result<&mut TextView, ValueError> {
        self.try_into()
    }
}

impl TryInto<ListView> for ObjView {
    type Error = ValueError;

    fn try_into(self) -> Result<ListView, Self::Error> {
        match self {
            ObjView::List(list_view) => Ok(list_view),
            _ => Err(ValueError::ExpectedList(self.clone())),
        }
    }
}

impl TryInto<MapView> for ObjView {
    type Error = ValueError;

    fn try_into(self) -> Result<MapView, Self::Error> {
        match self {
            ObjView::Map(map_view) => Ok(map_view),
            _ => Err(ValueError::ExpectedMap(self.clone())),
        }
    }
}

impl TryInto<TextView> for ObjView {
    type Error = ValueError;

    fn try_into(self) -> Result<TextView, Self::Error> {
        match self {
            ObjView::Text(text_view) => Ok(text_view),
            _ => Err(ValueError::ExpectedText(self.clone())),
        }
    }
}

impl<'a> TryInto<&'a ListView> for &'a ObjView {
    type Error = ValueError;

    fn try_into(self) -> Result<&'a ListView, Self::Error> {
        match self {
            ObjView::List(list_view) => Ok(list_view),
            _ => Err(ValueError::ExpectedList(self.clone())),
        }
    }
}

impl<'a> TryInto<&'a MapView> for &'a ObjView {
    type Error = ValueError;

    fn try_into(self) -> Result<&'a MapView, Self::Error> {
        match self {
            ObjView::Map(map_view) => Ok(map_view),
            _ => Err(ValueError::ExpectedMap(self.clone())),
        }
    }
}

impl<'a> TryInto<&'a TextView> for &'a ObjView {
    type Error = ValueError;

    fn try_into(self) -> Result<&'a TextView, Self::Error> {
        match self {
            ObjView::Text(text_view) => Ok(text_view),
            _ => Err(ValueError::ExpectedText(self.clone())),
        }
    }
}

impl<'a> TryInto<&'a mut ListView> for &'a mut ObjView {
    type Error = ValueError;

    fn try_into(self) -> Result<&'a mut ListView, Self::Error> {
        match self {
            ObjView::List(list_view) => Ok(list_view),
            _ => Err(ValueError::ExpectedList(self.clone())),
        }
    }
}

impl<'a> TryInto<&'a mut MapView> for &'a mut ObjView {
    type Error = ValueError;

    fn try_into(self) -> Result<&'a mut MapView, Self::Error> {
        match self {
            ObjView::Map(map_view) => Ok(map_view),
            _ => Err(ValueError::ExpectedMap(self.clone())),
        }
    }
}

impl<'a> TryInto<&'a mut TextView> for &'a mut ObjView {
    type Error = ValueError;

    fn try_into(self) -> Result<&'a mut TextView, Self::Error> {
        match self {
            ObjView::Text(text_view) => Ok(text_view),
            _ => Err(ValueError::ExpectedText(self.clone())),
        }
    }
}