module Flowdock.MessageTypes where

import           Control.Applicative
import           Control.Monad
import           Data.Aeson
import           Data.Int
import           Data.Text                  (Text)

-- -----------------------------------------------------------------------------
-- Deserialized Data Types

data EventAction = AddPeople { people :: !Text }
                 | Joined
                 | Block { userId :: !Text }
                 | Invite { emails :: !Text }
                 | Decline { emails :: !Text }
                 | Uninvite { emails :: !Text }
                 | AddRssFeed { url :: !Text }
                 | RemoveRssFeed { url :: !Text }
                 | AddTwitterFollower { twitterUser :: !Text }
                 | RemoveTwitterFollower { twitterFollower :: !Text }
                 | AddTwitterSearch { twitterTerm :: !Text }
                 | RemoveTwitterSearch { twitterTerm :: !Text }
                 deriving (Eq, Show)

instance FromJSON EventAction where
  parseJSON (Object o) = do
    actionType <- o .: "type"
    case (actionType :: Text) of
      "add_people"              -> AddPeople <$> o .: "description"
      "join"                    -> return Joined
      "block"                   -> Block <$> o .: "description"
      "invite"                  -> Invite <$> o .: "descrption"
      "decline"                 -> Decline <$> o .: "description"
      "uninvite"                -> Uninvite <$> o .: "description"
      "add_rss_feed"            -> AddRssFeed <$> o .: "description"
      "remove_rss_feed"         -> RemoveRssFeed <$> o .: "decription"
      "add_twitter_follower"    -> AddTwitterFollower <$> o .: "description"
      "remove_twitter_follower" -> RemoveTwitterFollower <$> o .: "description"
      "add_twitter_search"      -> AddTwitterSearch <$> o .: "description"
      "remove_twitter_search"   -> RemoveTwitterSearch <$> o .: "description"
      _                         -> mzero
  parseJSON _ = mzero

data ImageDetails = ImageDetails { imageHeight :: !Int, imageWidth :: !Int } deriving (Eq, Show)

instance FromJSON ImageDetails where
  parseJSON (Object o) = ImageDetails <$> o .: "height" <*> o .: "width"
  parseJSON _ = mzero

data Thumbnail = Thumbnail { thumbnailHeight :: !Int, thumbnailWidth :: !Int, path :: !Text } deriving (Eq, Show)

instance FromJSON Thumbnail where
  parseJSON (Object o) = Thumbnail <$> o .: "height" <*> o .: "width" <*> o .: "path"
  parseJSON _ = mzero

data Attachment = Attachment
  { attachmentID          :: !(Maybe Text)
  , attachmentContentType :: !Text
  , attachmentFileName    :: !Text
  , attachmentFileSize    :: !Int
  , attachmentFilePath    :: !Text
  }
  deriving (Eq, Show)

instance FromJSON Attachment where
  parseJSON (Object o) = do
    cid   <- o .:? "content_id"
    ctype <- o .: "content_type"
    fname <- o .: "file_name"
    fsize <- o .: "file_size"
    fpath <- o .: "path"
    return $ Attachment cid ctype fname fsize fpath
  parseJSON _ = mzero

data EventType = Message { content :: !Text }
               | Status  { content :: !Text }
               | Comment { title :: !Text
                         , text :: !Text }
               | Action !EventAction
               | TagChange { messageID :: !Int
                           , addedTags :: ![Text]
                           , removedTags :: ![Text] }
               | MessageEdit { messageID :: !Int
                             , updatedContent :: !Text }
               | UserActivity { lastActivity :: !Int64 }
               | File { filePath :: !Text
                      , fileName :: !Text
                      , fileSize :: !Int
                      , contentType :: !Text
                      , imageDetails :: !(Maybe ImageDetails)
                      , thumbnail :: !(Maybe Thumbnail)
                      }
               deriving (Eq, Show)

instance FromJSON EventType where
  parseJSON (Object o) = do
    eventType <- o .: "event"
    case (eventType :: Text) of
      "message" -> Message <$> o .: "content"
      "status"  -> Status <$> o .: "content"
      "comment" -> do
        cnt <- o .: "content"
        Comment <$> cnt .: "title" <*> cnt .: "text"
      "action"  -> do
        ob <- o .: "content"
        Action <$> parseJSON ob
      "tag-change" -> do
        cnt <- o .: "content"
        TagChange <$> cnt .: "message" <*> cnt .: "add" <*> cnt .: "remove"
      "message-edit" -> do
        cnt <- o .: "content"
        MessageEdit <$> cnt .: "message" <*> cnt .: "updated_content"
      "activity.user" -> do
        cnt <- o .: "content"
        UserActivity <$> cnt .: "last_activity"
      "file" -> do
        cnt <- o .: "content"
        File <$> cnt .: "path"
             <*> cnt .: "file_name"
             <*> cnt .: "file_size"
             <*> cnt .: "content_type"
             <*> cnt .:? "image"
             <*> cnt .:? "thumbnail"
      _ -> mzero
  parseJSON _ = error "4"

data Event = Event
  { eventID          :: !Int
  , eventApp         :: !(Maybe Text)
  , eventTags        :: ![Text]
  , eventUuid        :: !(Maybe Text)
  , eventFlow        :: !Text
  , eventSent        :: !Int64
  , eventAttachments :: ![Attachment]
  , eventUser        :: !Text
  , eventType        :: !EventType
  }
  deriving (Eq, Show)

instance FromJSON Event where
  parseJSON obj@(Object o) = do
    eid  <- o .: "id"
    app  <- o .:? "app"
    tags <- o .: "tags"
    uuid <- o .:? "uuid"
    flow <- o .: "flow"
    att  <- o .: "attachments"
    sent <- o .: "sent"
    user <- o .: "user"
    Event eid app tags uuid flow sent att user <$> parseJSON obj
  parseJSON _ = mzero