use super::*;
use std::str::FromStr;

#[derive(Serialize, Deserialize)]
pub struct ListCategories;

#[derive(Serialize, Deserialize)]
pub struct ListCategoriesResponse {
  op: String,
  categories: Vec<Category>
}

#[derive(Serialize, Deserialize)]
pub struct Search {
  q: String,
  type_: String,
  community_id: Option<i32>,
  sort: String,
  page: Option<i64>,
  limit: Option<i64>,
}

#[derive(Serialize, Deserialize)]
pub struct SearchResponse {
  op: String,
  comments: Vec<CommentView>,
  posts: Vec<PostView>,
}

#[derive(Serialize, Deserialize)]
pub struct GetModlog {
  mod_user_id: Option<i32>,
  community_id: Option<i32>,
  page: Option<i64>,
  limit: Option<i64>,
}

#[derive(Serialize, Deserialize)]
pub struct GetModlogResponse {
  op: String,
  removed_posts: Vec<ModRemovePostView>,
  locked_posts: Vec<ModLockPostView>,
  removed_comments: Vec<ModRemoveCommentView>,
  removed_communities: Vec<ModRemoveCommunityView>,
  banned_from_community: Vec<ModBanFromCommunityView>,
  banned: Vec<ModBanView>,
  added_to_community: Vec<ModAddCommunityView>,
  added: Vec<ModAddView>,
}


#[derive(Serialize, Deserialize)]
pub struct CreateSite {
  name: String,
  description: Option<String>,
  auth: String
}

#[derive(Serialize, Deserialize)]
pub struct EditSite {
  name: String,
  description: Option<String>,
  auth: String
}

#[derive(Serialize, Deserialize)]
pub struct GetSite;

#[derive(Serialize, Deserialize)]
pub struct SiteResponse {
  op: String,
  site: SiteView,
}

#[derive(Serialize, Deserialize)]
pub struct GetSiteResponse {
  op: String,
  site: Option<SiteView>,
  admins: Vec<UserView>,
  banned: Vec<UserView>,
}

impl Perform<ListCategoriesResponse> for Oper<ListCategories> {
  fn perform(&self) -> Result<ListCategoriesResponse, Error> {
    let _data: &ListCategories = &self.data;
    let conn = establish_connection();

    let categories: Vec<Category> = Category::list_all(&conn)?;

    // Return the jwt
    Ok(
      ListCategoriesResponse {
        op: self.op.to_string(),
        categories: categories
      }
      )
  }
}

impl Perform<GetModlogResponse> for Oper<GetModlog> {
  fn perform(&self) -> Result<GetModlogResponse, Error> {
    let data: &GetModlog = &self.data;
    let conn = establish_connection();

    let removed_posts = ModRemovePostView::list(&conn, data.community_id, data.mod_user_id, data.page, data.limit)?;
    let locked_posts = ModLockPostView::list(&conn, data.community_id, data.mod_user_id, data.page, data.limit)?;
    let removed_comments = ModRemoveCommentView::list(&conn, data.community_id, data.mod_user_id, data.page, data.limit)?;
    let banned_from_community = ModBanFromCommunityView::list(&conn, data.community_id, data.mod_user_id, data.page, data.limit)?;
    let added_to_community = ModAddCommunityView::list(&conn, data.community_id, data.mod_user_id, data.page, data.limit)?;

    // These arrays are only for the full modlog, when a community isn't given
    let mut removed_communities = Vec::new();
    let mut banned = Vec::new();
    let mut added = Vec::new();

    if data.community_id.is_none() {
      removed_communities = ModRemoveCommunityView::list(&conn, data.mod_user_id, data.page, data.limit)?;
      banned = ModBanView::list(&conn, data.mod_user_id, data.page, data.limit)?;
      added = ModAddView::list(&conn, data.mod_user_id, data.page, data.limit)?;
    }

    // Return the jwt
    Ok(
      GetModlogResponse {
        op: self.op.to_string(),
        removed_posts: removed_posts,
        locked_posts: locked_posts,
        removed_comments: removed_comments,
        removed_communities: removed_communities,
        banned_from_community: banned_from_community,
        banned: banned,
        added_to_community: added_to_community,
        added: added,
      }
      )
  }
}

impl Perform<SiteResponse> for Oper<CreateSite> {
  fn perform(&self) -> Result<SiteResponse, Error> {
    let data: &CreateSite = &self.data;
    let conn = establish_connection();

    let claims = match Claims::decode(&data.auth) {
      Ok(claims) => claims.claims,
      Err(_e) => {
        return Err(APIError::err(&self.op, "Not logged in."))?
      }
    };

    if has_slurs(&data.name) || 
      (data.description.is_some() && has_slurs(&data.description.to_owned().unwrap())) {
        return Err(APIError::err(&self.op, "No slurs"))?
      }

    let user_id = claims.id;

    // Make sure user is an admin
    if !UserView::read(&conn, user_id)?.admin {
      return Err(APIError::err(&self.op, "Not an admin."))?
    }

    let site_form = SiteForm {
      name: data.name.to_owned(),
      description: data.description.to_owned(),
      creator_id: user_id,
      updated: None,
    };

    match Site::create(&conn, &site_form) {
      Ok(site) => site,
      Err(_e) => {
        return Err(APIError::err(&self.op, "Site exists already"))?
      }
    };

    let site_view = SiteView::read(&conn)?;

    Ok(
      SiteResponse {
        op: self.op.to_string(), 
        site: site_view,
      }
      )
  }
}


impl Perform<SiteResponse> for Oper<EditSite> {
  fn perform(&self) -> Result<SiteResponse, Error> {
    let data: &EditSite = &self.data;
    let conn = establish_connection();

    let claims = match Claims::decode(&data.auth) {
      Ok(claims) => claims.claims,
      Err(_e) => {
        return Err(APIError::err(&self.op, "Not logged in."))?
      }
    };

    if has_slurs(&data.name) || 
      (data.description.is_some() && has_slurs(&data.description.to_owned().unwrap())) {
        return Err(APIError::err(&self.op, "No slurs"))?
      }

    let user_id = claims.id;

    // Make sure user is an admin
    if UserView::read(&conn, user_id)?.admin == false {
      return Err(APIError::err(&self.op, "Not an admin."))?
    }

    let found_site = Site::read(&conn, 1)?;

    let site_form = SiteForm {
      name: data.name.to_owned(),
      description: data.description.to_owned(),
      creator_id: found_site.creator_id,
      updated: Some(naive_now()),
    };

    match Site::update(&conn, 1, &site_form) {
      Ok(site) => site,
      Err(_e) => {
        return Err(APIError::err(&self.op, "Couldn't update site."))?
      }
    };

    let site_view = SiteView::read(&conn)?;

    Ok(
      SiteResponse {
        op: self.op.to_string(), 
        site: site_view,
      }
      )
  }
}

impl Perform<GetSiteResponse> for Oper<GetSite> {
  fn perform(&self) -> Result<GetSiteResponse, Error> {
    let _data: &GetSite = &self.data;
    let conn = establish_connection();

    // It can return a null site in order to redirect
    let site_view = match Site::read(&conn, 1) {
      Ok(_site) => Some(SiteView::read(&conn)?),
      Err(_e) => None
    };

    let admins = UserView::admins(&conn)?;
    let banned = UserView::banned(&conn)?;

    Ok(
      GetSiteResponse {
        op: self.op.to_string(), 
        site: site_view,
        admins: admins,
        banned: banned,
      }
      )
  }
}

impl Perform<SearchResponse> for Oper<Search> {
  fn perform(&self) -> Result<SearchResponse, Error> {
    let data: &Search = &self.data;
    let conn = establish_connection();

    let sort = SortType::from_str(&data.sort)?;
    let type_ = SearchType::from_str(&data.type_)?;

    let mut posts = Vec::new();
    let mut comments = Vec::new();

    match type_ {
      SearchType::Posts => {
        posts = PostView::list(&conn, 
                               PostListingType::All, 
                               &sort, 
                               data.community_id, 
                               None,
                               Some(data.q.to_owned()),
                               None, 
                               false, 
                               false, 
                               data.page, 
                               data.limit)?;
      },
      SearchType::Comments => {
        comments = CommentView::list(&conn, 
                                     &sort, 
                                     None, 
                                     None, 
                                     Some(data.q.to_owned()),
                                     None,
                                     false, 
                                     data.page,
                                     data.limit)?;
      }, 
      SearchType::Both => {
        posts = PostView::list(&conn, 
                               PostListingType::All, 
                               &sort, 
                               data.community_id, 
                               None,
                               Some(data.q.to_owned()),
                               None, 
                               false, 
                               false, 
                               data.page, 
                               data.limit)?;
        comments = CommentView::list(&conn, 
                                     &sort, 
                                     None, 
                                     None, 
                                     Some(data.q.to_owned()),
                                     None,
                                     false, 
                                     data.page,
                                     data.limit)?;
      }
    };


    // Return the jwt
    Ok(
      SearchResponse {
        op: self.op.to_string(),
        comments: comments,
        posts: posts,
      }
      )
  }
}