{- This file is part of funbot.
 -
 - Written in 2015 by fr33domlover <fr33domlover@rel4tion.org>.
 -
 - ♡ Copying is an act of love. Please copy, reuse and share.
 -
 - The author(s) have dedicated all copyright and related and neighboring
 - rights to this software to the public domain worldwide. This software is
 - distributed without any warranty.
 -
 - You should have received a copy of the CC0 Public Domain Dedication along
 - with this software. If not, see
 - <http://creativecommons.org/publicdomain/zero/1.0/>.
 -}

module FunBot.Types
    ( Filter (..)
    , BranchFilter
    , PushAnnSpec (..)
    , NewsItemFields (..)
    , NewsAnnSpec (..)
    , BotEnv (..)
    , Settings (..)
    , SettingsOption
    , SettingsTree
    , Memo (..)
    , BotState (..)
    , Branch (..)
    , Commit (..)
    , Push (..)
    , Tag (..)
    , MR (..)
    , FeedItem (..)
    , ExtEvent (..)
    , BotSession
    , ExtEventSource
    , ExtEventHandler
    )
where

import qualified Data.HashMap.Lazy as M
import qualified Data.HashSet as S
import Data.Settings.Types (Section (..), Option (..))
import Data.Time.Clock (UTCTime)
import Network.IRC.Fun.Bot.Types (Session, EventSource, EventHandler)

-- | Generic item filter
data Filter a = Accept [a] | Reject [a]

-- | Chooser for repo branches whose commits should be announced to IRC
type BranchFilter = Filter String

-- | Configuration for announcing a git repo's commits to a specific channel
data PushAnnSpec = PushAnnSpec
    { -- | IRC channel into which to announce
      pAnnChannel    :: String
      -- Branch filter to choose which branches to announce
    , pAnnBranches   :: BranchFilter
      -- Whether to report all commits in a push ('True') or shorten long
      -- pushes to avoid channel spam ('False').
    , pAnnAllCommits :: Bool
    }

-- | Pick news item fields to display
data NewsItemFields = NewsItemFields
    { dispFeedTitle :: Bool
    , dispAuthor    :: Bool
    , dispUrl       :: Bool
    }

-- | Configuration for announcing news items
data NewsAnnSpec = NewsAnnSpec
    { -- | IRC channels into which to announce
      nAnnChannels :: [String]
      -- | Filter for picking news item fields to display or hide
    , nAnnFields   :: NewsItemFields
    }

-- | Read-only custom bot environment
data BotEnv = BotEnv
    { -- | Port on which the web hook event source will run
      webHookSourcePort :: Int
      -- | Maps a Git repo name+owner to annoucement details
    , gitAnnChans       :: M.HashMap (String, String) [PushAnnSpec]
      -- | An 'IO' action which schedules saving settings to disk. There is a
      -- wrapper in the 'Session' monad which uses this with the settings
      -- stored in bot state, so you probably don't need this field directly.
    , saveSettings      :: Settings -> IO ()
      -- | An 'IO' action which schedules saving memos to disk. There is a
      -- wrapper in the 'Session' monad which uses this with the memos
      -- stored in bot state, so you probably don't need this field directly.
    , saveMemos         :: M.HashMap String [Memo] -> IO ()
      -- | Filename for logging feed listener errors
    , feedErrorLogFile  :: FilePath
    }

-- | User-modifiable bot behavior settings
data Settings = Settings
    { -- | Maps a feed label to its URL and announcement details
      watchedFeeds :: M.HashMap String (String, NewsAnnSpec)
    }

-- | Alias for the settings option type
type SettingsOption = Option BotSession

-- | Alias for the settings section type
type SettingsTree = Section BotSession

-- | A message left to an offline user, for them to read later.
data Memo = Memo
    { memoTime    :: String
    , memoSender  :: String
    , memoRecvIn  :: Maybe String
    , memoSendIn  :: Maybe String
    , memoContent :: String
    --, memoRead    :: Bool
    }

-- | Read-write custom bot state
data BotState = BotState
    { -- | User-modifiable bot behavior settings
      settings :: Settings
      -- | Settings tree and access definition for UI
    , stree    :: SettingsTree
      -- | Memos waiting for users to connect.
    , memos    :: M.HashMap String [Memo]
    }

data Branch = Branch
    { branchName      :: String
    , branchRepo      :: String
    , branchRepoOwner :: String
    }
    deriving Show

data Commit = Commit
    { commitAuthor    :: String
    , commitTitle     :: String
    , commitUrl       :: String
    }
    deriving Show

data Push = Push
    { pushBranch  :: Branch
    , pushCommits :: [Commit]
    }
    deriving Show

data Tag = Tag
    { tagAuthor    :: String
    , tagRef       :: String
    , tagRepo      :: String
    , tagRepoOwner :: String
    }
    deriving Show

data MR = MR
    { mrAuthor    :: String
    , mrId        :: Int
    , mrRepo      :: String
    , mrRepoOwner :: String
    , mrTitle     :: String
    , mrUrl       :: String
    , mrAction    :: String
    }
    deriving Show

data FeedItem = FeedItem
    { itemFeedLabel :: String
    , itemFeedTitle :: Maybe String
    , itemTitle     :: String
    , itemAuthor    :: Maybe String
    , itemUrl       :: Maybe String
    }
    deriving Show

-- | An event coming from one of the extra event sources.
data ExtEvent
    = GitPush Push
    | GitTag Tag
    | MergeRequest MR
    | NewsItem FeedItem
    deriving Show

-- | Shortcut alias for bot session monad
type BotSession = Session BotEnv BotState

-- | Shortcut alias for event source function type
type ExtEventSource = EventSource BotEnv BotState ExtEvent

-- | Shortcut alias for event handler function type
type ExtEventHandler = EventHandler BotEnv BotState ExtEvent