module Test.Main where

import GenericParser.Parser (Parser(..), parse)
import GenericParser.DomainParser.Common (ldh_str, DomainError(..))
import GenericParser.DomainParserRFC1035 as RFC1035
import GenericParser.DomainParser as ModernDomains
import GenericParser.IPAddress (IPv4Error(..))
import GenericParser.IPAddress as IP
import GenericParser.EmailAddress as E

import Prelude (Unit, discard, show, ($), (<>))
import Data.Either (Either(..))
import Data.Maybe (Maybe(..), maybe)
import Data.String.CodeUnits (fromCharArray)
import Effect.Console (log)
import Effect (Effect, foreachE)

logtest :: forall e v. String -> Parser e v -> String -> (v -> String) -> (e -> String) -> Effect Unit
logtest fname (Parser p) str r e = do
  log $ "(" <> fname <> ") parsing '" <> str <> "': "
    <> case p { string: str, position: 0 } of
      Left  { position, error } -> "failed at position " <> show position <> case error of
        Nothing  -> " -> no error reported"
        Just err -> " -> error: " <> e err
      Right { suffix, result } -> (r result) <> " '" <> suffix.string <> "'"

id :: forall a. a -> a
id a = a

showerror :: DomainError -> String
showerror (LabelTooLarge size)  = "LabelTooLarge (size: " <> show size <> ")"
showerror (DomainTooLarge size) = "DomainTooLarge (size: " <> show size <> ")"
showerror (InvalidCharacter)    = "InvalidCharacter"
showerror (EOFExpected)         = "EOFExpected"

test_series :: forall e v
  .  String
  -> Parser e v
  -> (v -> String)
  -> (e -> String)
  -> Array String
  -> Effect Unit
test_series l p v e a = foreachE a (\s -> logtest l p s v e)

showerror_ipv6 :: IP.IPv6Error -> String
showerror_ipv6 (IP.InvalidCharacter)                = "InvalidCharacter"
showerror_ipv6 (IP.TooManyHexaDecimalCharacters)    = "TooManyHexaDecimalCharacters"
showerror_ipv6 (IP.NotEnoughChunks)                 = "NotEnoughChunks"
showerror_ipv6 (IP.TooManyChunks)                   = "TooManyChunks"
showerror_ipv6 IP.IPv6UnrelevantShortRepresentation = "useless double dots"

test_ipv6 :: String -> Effect Unit
test_ipv6 ipv6string = do
  log $ "(ipv6) parsing '" <> ipv6string <> "': "
        <> case parse IP.ipv6 { string: ipv6string, position: 0 } of
             Left { position, error } -> "failed at position " <> show position <> case error of
               Nothing  -> " -> no error reported"
               Just err -> " -> error: " <> showerror_ipv6 err
             Right { suffix, result } -> "result: " <> result <> " '" <> suffix.string <> "'"

showerror_ipv4 :: IP.IPv4Error -> String
showerror_ipv4 (NumberTooBig x) = "value '" <> show x <> "' is > 255"
showerror_ipv4 IPv4UnrelevantShortRepresentation = "useless double dots"

test_ipv4 :: String -> Effect Unit
test_ipv4 ipv4string = do
  log $ "(ipv4) parsing '" <> ipv4string <> "': "
        <> case parse IP.ipv4 { string: ipv4string, position: 0 } of
             Left { position, error } -> "failed at position " <> show position <> case error of
               Nothing  -> " -> no error reported"
               Just err -> " -> error: " <> showerror_ipv4 err
             Right { suffix, result } -> "result: " <> result <> " '" <> suffix.string <> "'"

showerror_email :: E.EmailError -> String
showerror_email E.InvalidCharacter = "InvalidCharacter"
showerror_email (E.InvalidDomain e) = "invalid domain: " <> maybe "no domain error provided, weird" showerror e

test_email :: String -> Effect Unit
test_email emailstring = do
  log $ "(email) parsing '" <> emailstring <> "': "
        <> case parse E.email { string: emailstring, position: 0 } of
             Left { position, error } -> "failed at position " <> show position <> case error of
               Nothing  -> " -> no error reported"
               Just err -> " -> error: " <> showerror_email err
             Right { suffix, result } -> "result: " <> result <> " '" <> suffix.string <> "'"

main :: Effect Unit
main = do
  let domains = [
      "",
      "-",
      ".",
      "a",
      "a.",
      "a-",
      "a.x",
      "a2.org",
      "a33.org",
      "xblah.a.x",
      "xblah.a2.org",
      "xblah.a33.org",
      "_dmarc.example.com"
    ]
  test_series "ldh_str" ldh_str fromCharArray showerror domains
  log ""
  test_series "RFC1035.label" RFC1035.label id showerror domains
  log ""
  test_series "RFC1035.subdomain" RFC1035.subdomain id showerror domains
  log ""
  test_series "RFC1035.sub_eof" RFC1035.sub_eof id showerror domains
  log ""
  test_series "RFC1035.domain" RFC1035.domain id showerror domains
  log ""
  test_series "ModernDomains.domain" ModernDomains.domain id showerror domains

  log ""
  test_ipv4 "10..1."
  test_ipv4 "10..1"
  test_ipv4 "1..2"
  test_ipv4 "1.2.3.4"
  test_ipv4 "192.168..1"
  test_ipv4 "1..2.3.4"
  test_ipv4 "1.5.10.255"
  test_ipv4 "100.200.300.400"

  log ""
  test_ipv6 "2001:0"
  test_ipv6 "2001::x:0"
  test_ipv6 "2001:x::0"
  test_ipv6 "2001::0"
  test_ipv6 "2001::1:"
  test_ipv6 "::"
  test_ipv6 "2001::"
  test_ipv6 "::1"
  test_ipv6 "2001:0db8:0000:0000:0000:8a2e:0370:7334:30:1035:3"
  test_ipv6 "2001:0db8:0000:0000:0000:8a2e:0370:7334"
  test_ipv6 "2001:0db8::8a2e:0370:7334"

  log ""
  test_email "guy@example.com"
  test_email "guy.name@example.com"
  test_email "well-look-at-this-domain@.com"
  test_email "guy-@example.com"