{-# LANGUAGE OverloadedStrings #-}

{-

This file is part of the Haskell package themoviedb. It is subject to
the license terms in the LICENSE file found in the top-level directory
of this distribution and at git://pmade.com/themoviedb/LICENSE. No
part of themoviedb package, including this file, may be copied,
modified, propagated, or distributed except according to the terms
contained in the LICENSE file.

-}

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module Main (main) where

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import Control.Monad.IO.Class (liftIO)
import Data.Maybe (listToMaybe)
import Data.Text (Text)
import qualified Data.Text as T
import Data.Time (formatTime)
import Data.Time.Locale.Compat (defaultTimeLocale)
import Network.API.TheMovieDB
import System.Environment (getArgs)
import System.Exit (exitFailure, exitSuccess)
import Text.Printf (printf)

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-- | Simple banner style printing of a 'Movie'.
printMovieHeader :: Movie -> IO ()
printMovieHeader m =
  printf "%8d: %s (%s)\n" (movieID m) (T.unpack $ movieTitle m) year
  where year = case movieReleaseDate m of
                 Just d  -> formatTime defaultTimeLocale "%Y" d
                 Nothing -> "----"

--------------------------------------------------------------------------------
-- | Simple banner style printing of a 'TV'.
printTVHeader :: TV -> IO ()
printTVHeader t =
  printf "%8d: %s (%s)\n" (tvID t) (T.unpack $ tvName t) year
  where year = case tvFirstAirDate t of
                 Just d  -> formatTime defaultTimeLocale "%Y" d
                 Nothing -> "----"

--------------------------------------------------------------------------------
-- | Print more detailed information for a 'Movie'.
printMovieDetails :: Movie -> IO ()
printMovieDetails m =
  do putStrLn $ "Popularity: " ++ show (moviePopularity m)
     putStrLn $ strJoin $ map genreName (movieGenres m)
     putStrLn "-- "
     putStrLn $ T.unpack (movieOverview m)
  where strJoin = T.unpack . T.intercalate ", "

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-- | Print information about a season.
printSeason :: Season -> IO ()
printSeason s =
  do putStrLn $ "Season " ++ show (seasonNumber s) ++ " " ++ year
     mapM_ (putStrLn . episode) $ seasonEpisodes s

  where
    episode e = "\tE" ++ show (episodeNumber e) ++ " "
                ++ T.unpack (episodeName e)

    year = case seasonAirDate s of
             Just d  -> formatTime defaultTimeLocale "%Y" d
             Nothing -> "----"

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-- | Search for movies with a query string.
searchAndListMovies :: Text -> TheMovieDB ()
searchAndListMovies query = do
  movies <- searchMovies query
  liftIO $ mapM_ printMovieHeader movies

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-- | Find a specific movie given its ID.
fetchAndPrintMovie :: ItemID -> TheMovieDB ()
fetchAndPrintMovie mid = do
  cfg <- config
  movie <- fetchMovie mid

  liftIO $ do
    printMovieHeader movie
    mapM_ (putStrLn . T.unpack) (moviePosterURLs cfg movie)
    printMovieDetails movie

--------------------------------------------------------------------------------
-- | Search for TV series using a query string.
searchAndListTV :: Text -> TheMovieDB ()
searchAndListTV query = do
  tvs <- searchTV query
  liftIO $ mapM_ printTVHeader tvs

--------------------------------------------------------------------------------
-- | Find a specific TV series given its ID.
fetchAndPrintTV :: ItemID -> TheMovieDB ()
fetchAndPrintTV tid = do
  tv <- fetchTV tid
  liftIO $ printTVHeader tv
  liftIO $ mapM_ printSeason (tvSeasons tv)

--------------------------------------------------------------------------------
fetchAndPrintSeason :: ItemID -> Int -> TheMovieDB ()
fetchAndPrintSeason t s = do
  season <- fetchTVSeason t s
  liftIO $ printSeason season

--------------------------------------------------------------------------------
fetchAndPrintFullTV :: ItemID -> TheMovieDB ()
fetchAndPrintFullTV t = do
  tv <- fetchFullTVSeries t
  liftIO $ printTVHeader tv
  liftIO $ mapM_ printSeason (tvSeasons tv)

--------------------------------------------------------------------------------
-- | Low budget command line parsing and dispatch.
main :: IO ()
main = do
  args <- getArgs
  let key = maybe T.empty T.pack (listToMaybe args)

  result <- runTheMovieDB key $
    case args of
      [_, "search", query]  -> searchAndListMovies (T.pack query)
      [_, "fetch", mid]     -> fetchAndPrintMovie (read mid)
      [_, "tsearch", query] -> searchAndListTV (T.pack query)
      [_, "tfetch", tid]    -> fetchAndPrintTV (read tid)
      [_, "season", t, s]   -> fetchAndPrintSeason (read t) (read s)
      [_, "tfull", t]       -> fetchAndPrintFullTV (read t)
      _                     -> liftIO (putStrLn usage >> exitFailure)

  case result of
    Left err -> print err >> exitFailure
    Right _  -> exitSuccess

  where usage = "Usage: tmdb key {search|fetch|tsearch|tfetch|season|tfull}\n\n" ++
                "Description:\n" ++
                "       search: search TheMovieDB\n" ++
                "        fetch: fetch info about one movie\n" ++
                "      tsearch: search for TV series\n" ++
                "       tfetch: fetch TV series by ID\n" ++
                "       season: fetch one season by TV ID and season num\n" ++
                "        tfull: pull everything about TV series by ID\n" ++
                "Examples:\n" ++
                "       tmdb KEY search \"back to the future\"\n" ++
                "       tmdb KEY fetch 105\n" ++
                "       tmdb KEY tsearch Firefly\n" ++
                "       tmdb KEY tfetch 1437\n" ++
                "       tmdb KEY season 1437 1\n" ++
                "       tmdb KEY tfull 1437\n"