use crate::entities::parser::{
  app::AppIdentify,
  view::{ViewDesc, ViewIdentify, ViewName, ViewThumbnail},
};
use crate::view_ext::gen_view_id;
use collab_folder::core::{View, ViewLayout};
use flowy_derive::{ProtoBuf, ProtoBuf_Enum};
use flowy_error::ErrorCode;
use std::collections::HashMap;
use std::convert::TryInto;
use std::ops::{Deref, DerefMut};

#[derive(Eq, PartialEq, ProtoBuf, Debug, Default, Clone)]
pub struct ViewPB {
  #[pb(index = 1)]
  pub id: String,

  #[pb(index = 2)]
  pub app_id: String,

  #[pb(index = 3)]
  pub name: String,

  #[pb(index = 4)]
  pub create_time: i64,

  #[pb(index = 5)]
  pub belongings: Vec<ViewPB>,

  #[pb(index = 6)]
  pub layout: ViewLayoutTypePB,
}

impl std::convert::From<View> for ViewPB {
  fn from(view: View) -> Self {
    ViewPB {
      id: view.id,
      app_id: view.bid,
      name: view.name,
      create_time: view.created_at,
      belongings: Default::default(),
      layout: view.layout.into(),
    }
  }
}

#[derive(Eq, PartialEq, Hash, Debug, ProtoBuf_Enum, Clone)]
pub enum ViewLayoutTypePB {
  Document = 0,
  Grid = 3,
  Board = 4,
  Calendar = 5,
}

impl std::default::Default for ViewLayoutTypePB {
  fn default() -> Self {
    ViewLayoutTypePB::Grid
  }
}

impl std::convert::From<ViewLayout> for ViewLayoutTypePB {
  fn from(rev: ViewLayout) -> Self {
    match rev {
      ViewLayout::Grid => ViewLayoutTypePB::Grid,
      ViewLayout::Board => ViewLayoutTypePB::Board,
      ViewLayout::Document => ViewLayoutTypePB::Document,
      ViewLayout::Calendar => ViewLayoutTypePB::Calendar,
    }
  }
}

#[derive(Eq, PartialEq, Debug, Default, ProtoBuf, Clone)]
pub struct RepeatedViewPB {
  #[pb(index = 1)]
  pub items: Vec<ViewPB>,
}

impl std::convert::From<Vec<View>> for RepeatedViewPB {
  fn from(views: Vec<View>) -> Self {
    let items = views
      .into_iter()
      .map(|value| value.into())
      .collect::<Vec<ViewPB>>();
    RepeatedViewPB { items }
  }
}

impl Deref for RepeatedViewPB {
  type Target = Vec<ViewPB>;

  fn deref(&self) -> &Self::Target {
    &self.items
  }
}

impl DerefMut for RepeatedViewPB {
  fn deref_mut(&mut self) -> &mut Self::Target {
    &mut self.items
  }
}

#[derive(Default, ProtoBuf)]
pub struct RepeatedViewIdPB {
  #[pb(index = 1)]
  pub items: Vec<String>,
}

#[derive(Default, ProtoBuf)]
pub struct CreateViewPayloadPB {
  #[pb(index = 1)]
  pub belong_to_id: String,

  #[pb(index = 2)]
  pub name: String,

  #[pb(index = 3)]
  pub desc: String,

  #[pb(index = 4, one_of)]
  pub thumbnail: Option<String>,

  #[pb(index = 5)]
  pub layout: ViewLayoutTypePB,

  #[pb(index = 6)]
  pub initial_data: Vec<u8>,

  #[pb(index = 7)]
  pub ext: HashMap<String, String>,
}

#[derive(Debug, Clone)]
pub struct CreateViewParams {
  pub belong_to_id: String,
  pub name: String,
  pub desc: String,
  pub layout: ViewLayoutTypePB,
  pub view_id: String,
  pub initial_data: Vec<u8>,
  pub ext: HashMap<String, String>,
}

impl TryInto<CreateViewParams> for CreateViewPayloadPB {
  type Error = ErrorCode;

  fn try_into(self) -> Result<CreateViewParams, Self::Error> {
    let name = ViewName::parse(self.name)?.0;
    let belong_to_id = AppIdentify::parse(self.belong_to_id)?.0;
    let view_id = gen_view_id();

    Ok(CreateViewParams {
      belong_to_id,
      name,
      desc: self.desc,
      layout: self.layout,
      view_id,
      initial_data: self.initial_data,
      ext: self.ext,
    })
  }
}

#[derive(Default, ProtoBuf, Clone, Debug)]
pub struct ViewIdPB {
  #[pb(index = 1)]
  pub value: String,
}

impl std::convert::From<&str> for ViewIdPB {
  fn from(value: &str) -> Self {
    ViewIdPB {
      value: value.to_string(),
    }
  }
}

#[derive(Default, ProtoBuf, Clone, Debug)]
pub struct DeletedViewPB {
  #[pb(index = 1)]
  pub view_id: String,

  #[pb(index = 2, one_of)]
  pub index: Option<i32>,
}

impl std::ops::Deref for ViewIdPB {
  type Target = str;

  fn deref(&self) -> &Self::Target {
    &self.value
  }
}

#[derive(Default, ProtoBuf)]
pub struct UpdateViewPayloadPB {
  #[pb(index = 1)]
  pub view_id: String,

  #[pb(index = 2, one_of)]
  pub name: Option<String>,

  #[pb(index = 3, one_of)]
  pub desc: Option<String>,

  #[pb(index = 4, one_of)]
  pub thumbnail: Option<String>,
}

#[derive(Clone, Debug)]
pub struct UpdateViewParams {
  pub view_id: String,
  pub name: Option<String>,
  pub desc: Option<String>,
  pub thumbnail: Option<String>,
}

impl TryInto<UpdateViewParams> for UpdateViewPayloadPB {
  type Error = ErrorCode;

  fn try_into(self) -> Result<UpdateViewParams, Self::Error> {
    let view_id = ViewIdentify::parse(self.view_id)?.0;

    let name = match self.name {
      None => None,
      Some(name) => Some(ViewName::parse(name)?.0),
    };

    let desc = match self.desc {
      None => None,
      Some(desc) => Some(ViewDesc::parse(desc)?.0),
    };

    let thumbnail = match self.thumbnail {
      None => None,
      Some(thumbnail) => Some(ViewThumbnail::parse(thumbnail)?.0),
    };

    Ok(UpdateViewParams {
      view_id,
      name,
      desc,
      thumbnail,
    })
  }
}

#[derive(ProtoBuf_Enum)]
pub enum MoveFolderItemType {
  MoveApp = 0,
  MoveView = 1,
}

impl std::default::Default for MoveFolderItemType {
  fn default() -> Self {
    MoveFolderItemType::MoveApp
  }
}

#[derive(Default, ProtoBuf)]
pub struct MoveFolderItemPayloadPB {
  #[pb(index = 1)]
  pub item_id: String,

  #[pb(index = 2)]
  pub from: i32,

  #[pb(index = 3)]
  pub to: i32,

  #[pb(index = 4)]
  pub ty: MoveFolderItemType,
}

pub struct MoveViewParams {
  pub item_id: String,
  pub from: usize,
  pub to: usize,
  pub ty: MoveFolderItemType,
}

impl TryInto<MoveViewParams> for MoveFolderItemPayloadPB {
  type Error = ErrorCode;

  fn try_into(self) -> Result<MoveViewParams, Self::Error> {
    let view_id = ViewIdentify::parse(self.item_id)?.0;
    Ok(MoveViewParams {
      item_id: view_id,
      from: self.from as usize,
      to: self.to as usize,
      ty: self.ty,
    })
  }
}

// impl<'de> Deserialize<'de> for ViewDataType {
//     fn deserialize<D>(deserializer: D) -> Result<Self, <D as Deserializer<'de>>::Error>
//     where
//         D: Deserializer<'de>,
//     {
//         struct ViewTypeVisitor();
//
//         impl<'de> Visitor<'de> for ViewTypeVisitor {
//             type Value = ViewDataType;
//             fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
//                 formatter.write_str("RichText, PlainText")
//             }
//
//             fn visit_u8<E>(self, v: u8) -> Result<Self::Value, E>
//             where
//                 E: de::Error,
//             {
//                 let data_type;
//                 match v {
//                     0 => {
//                         data_type = ViewDataType::RichText;
//                     }
//                     1 => {
//                         data_type = ViewDataType::PlainText;
//                     }
//                     _ => {
//                         return Err(de::Error::invalid_value(Unexpected::Unsigned(v as u64), &self));
//                     }
//                 }
//                 Ok(data_type)
//             }
//
//             fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
//             where
//                 E: de::Error,
//             {
//                 let data_type;
//                 match s {
//                     "Doc" | "RichText" => {
//                         // Rename ViewDataType::Doc to ViewDataType::RichText, So we need to migrate the ViewType manually.
//                         data_type = ViewDataType::RichText;
//                     }
//                     "PlainText" => {
//                         data_type = ViewDataType::PlainText;
//                     }
//                     unknown => {
//                         return Err(de::Error::invalid_value(Unexpected::Str(unknown), &self));
//                     }
//                 }
//                 Ok(data_type)
//             }
//         }
//         deserializer.deserialize_any(ViewTypeVisitor())
//     }
// }