From 4d3122c055cc93a902ac24b8aba1323422519ce7 Mon Sep 17 00:00:00 2001
From: Joe Crayne <joe@jerkface.net>
Date: Wed, 8 Jan 2020 02:03:12 -0500
Subject: Oops, forgot to commit this.

---
 kad/tests/searchReset.hs | 120 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 kad/tests/searchReset.hs

diff --git a/kad/tests/searchReset.hs b/kad/tests/searchReset.hs
new file mode 100644
index 00000000..a48b5aae
--- /dev/null
+++ b/kad/tests/searchReset.hs
@@ -0,0 +1,120 @@
+import Control.Concurrent
+import Control.Concurrent.STM
+import Control.Monad
+import Data.Bits
+import GHC.Event
+
+import Network.Kademlia
+import Network.Kademlia.Bootstrap
+import Network.Kademlia.CommonAPI
+import Network.Kademlia.Persistence
+import Network.Kademlia.Routing
+import Network.Kademlia.Search
+
+import Network.QueryResponse as QR
+import qualified Data.MinMaxPSQ as MM
+import qualified Data.Set as Set
+
+makeSchResults :: TVar (Maybe (SearchState Int Int () Int Int Int)) -> TVar Int -> IO ([Int],[Int],Maybe ())
+makeSchResults mbv var = do
+    (r,io) <- atomically $ do
+        n <- readTVar var
+        let ns = take 4 [n .. ]
+        writeTVar var $! n + 4
+        let r = (ns, ns, Just ()) -- Maybe ([ni], [r], Maybe tok)
+            stmio = if n > 490
+                        then do
+                            ms <- readTVar mbv
+                            case ms of
+                                Just s -> do report <- showSearchState s
+                                             return $ putStrLn $ "cnt=" ++ show n ++ " " ++ report
+                                _ -> return $ return ()
+                        else return $ return ()
+        io <- stmio
+        return (r,io)
+    io
+    return r
+
+kad :: KademliaSpace Int Int
+kad = KademliaSpace
+    { kademliaLocation = id
+    , kademliaTestBit  = \x i -> testBit i x
+    , kademliaXor      = \x y -> abs (x - y)
+    , kademliaSample   = \_ x _ -> pure x
+    }
+
+sch :: TVar (Maybe (SearchState Int Int () Int Int Int)) -> TVar Int -> Search Int Int () Int Int Int
+sch mbv var = Search
+    { searchSpace       = kad
+    , searchNodeAddress = id
+    -- searchQuery :: nid -> ni -> (qk -> Result ([ni], [r], Maybe tok) -> IO ()) -> IO qk
+    , searchQuery       = \_ _ f -> do
+        val <- atomically $ do
+            n <- readTVar var
+            writeTVar var $! n + 1
+            return n
+        tm <- getSystemTimerManager
+        k <- registerTimeout tm 200000 $ do
+            putStrLn $ "makeSchResults " ++ show val
+            r <- makeSchResults mbv var
+            f val (Success r)
+        return val
+    -- searchQueryCancel  :: (IO () -> STM ()) -> qk -> STM ()
+    , searchQueryCancel = \runio qk -> do
+        runio $ putStrLn $ "CANCEL " ++ show qk
+        return ()
+    , searchAlpha       = 4
+    , searchK           = 8
+    }
+
+onResult :: Int -> STM Bool
+onResult k = return (k < 50000)
+
+showSearchState st = do
+    pc <- readTVar (searchPendingCount st)
+    q <- readTVar (searchQueued st)
+    inf <- readTVar (searchInformant st)
+    vset <- readTVar (searchVisited st)
+    return $ unwords
+        [ "pending=" ++ show pc
+        , "|q|=" ++ show (maybe 0 MM.size q)
+        , "|inf|=" ++ show (MM.size inf)
+        , "|visited|=" ++ show (Set.size vset)
+        ]
+
+main = do
+    var <- newTVarIO 5
+    fin <- newTVarIO False
+    mbstvar <- newTVarIO Nothing
+    s <- atomically $ newSearch (sch mbstvar var) maxBound [1..4]
+    atomically $ writeTVar mbstvar (Just s)
+    t <- forkIO $ do searchLoop (sch mbstvar var) maxBound onResult s
+                     atomically $ writeTVar fin True
+
+    putStrLn "Waiting on counter."
+    (done,n) <- atomically $ do
+        done <- readTVar fin
+        n <- readTVar var
+        if (not done && n < 500)
+            then retry
+            else return (done,n)
+    putStrLn $ "(done,n) = " ++ show (done,n)
+    report <- atomically $ do
+        report <- showSearchState s
+        searchCancel s
+        return report
+    putStrLn report
+    putStrLn "Canceled.  Awaiting fin.  The program should quit shortly without much output after this."
+
+    forkIO $
+        let loop = do
+                (x,report) <- atomically $ (,) <$> readTVar var <*> showSearchState s
+                putStrLn $ "query after cancel! " ++ show x ++ " " ++ report
+                atomically $ readTVar var >>= \y -> if x == y then retry else return ()
+                loop
+        in loop
+    -- atomically $ check =<< readTVar fin
+    putStrLn $ "Awaiting reset"
+    let near nid = return [1..4]
+    reset near (sch mbstvar var) maxBound s
+    putStrLn $ "Finished."
-- 
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