module Tst = (val Containers_testlib.make ~__FILE__ ())
include Tst
open CCParse

module T = struct
  type tree = L of int | N of tree * tree
end

open T

let mk_leaf x = L x
let mk_node x y = N (x, y)

let ptree =
  fix @@ fun self ->
  skip_space
  *> (char '(' *> (pure mk_node <*> self <*> self)
     <* char ')' <|> (U.int >|= mk_leaf))

let ptree' =
  fix_memo @@ fun self ->
  skip_space
  *> (char '(' *> (pure mk_node <*> self <*> self)
     <* char ')' <|> (U.int >|= mk_leaf))

let rec pptree = function
  | N (a, b) -> Printf.sprintf "N (%s, %s)" (pptree a) (pptree b)
  | L x -> Printf.sprintf "L %d" x

let errpp pp = function
  | Ok x -> "Ok " ^ pp x
  | Error s -> "Error " ^ s

let errpptree = errpp pptree

let erreq eq x y =
  match x, y with
  | Ok x, Ok y -> eq x y
  | Error _, Error _ -> true
  | _ -> false
;;

(* ### start tests ### *)

eq ~printer:errpptree
  (Ok (N (L 1, N (L 2, L 3))))
  (parse_string ptree "(1 (2 3))")
;;

eq ~printer:errpptree
  (Ok (N (N (L 1, L 2), N (L 3, N (L 4, L 5)))))
  (parse_string ptree "((1 2) (3 (4 5)))")
;;

eq ~printer:errpptree
  (Ok (N (L 1, N (L 2, L 3))))
  (parse_string ptree' "(1 (2 3))")
;;

eq ~printer:errpptree
  (Ok (N (N (L 1, L 2), N (L 3, N (L 4, L 5)))))
  (parse_string ptree' "((1 2) (3 (4 5)))")
;;

t @@ fun () ->
let p = U.list ~sep:"," U.word in
let printer = function
  | Ok l -> "Ok " ^ CCFormat.(to_string (Dump.list string_quoted)) l
  | Error s -> "Error " ^ s
in
assert_equal ~printer
  (Ok [ "abc"; "de"; "hello"; "world" ])
  (parse_string p "[abc , de, hello ,world  ]");
true
;;

t @@ fun () ->
let test n =
  let p = CCParse.(U.list ~sep:"," U.int) in

  let l = CCList.(1 -- n) in
  let l_printed =
    CCFormat.(to_string (within "[" "]" (list ~sep:(return ",") int))) l
  in

  let l' = CCParse.parse_string_exn p l_printed in

  assert_equal ~printer:Q.Print.(list int) l l'
in
test 300_000;
true
;;

t @@ fun () ->
let open CCParse.Infix in
let module P = CCParse in
let parens p = P.char '(' *> p <* P.char ')' in
let add = P.char '+' *> P.return ( + ) in
let sub = P.char '-' *> P.return ( - ) in
let mul = P.char '*' *> P.return ( * ) in
let div = P.char '/' *> P.return ( / ) in
let integer =
  P.chars1_if (function
    | '0' .. '9' -> true
    | _ -> false)
  >|= int_of_string
in

let chainr1 e op =
  P.fix (fun r -> e >>= fun x -> op <*> P.return x <*> r <|> P.return x)
in

let expr : int P.t =
  P.fix (fun expr ->
      let factor = parens expr <|> integer in
      let term = chainr1 factor (mul <|> div) in
      chainr1 term (add <|> sub))
in

assert_equal (Ok 6) (P.parse_string expr "4*1+2");
assert_equal (Ok 12) (P.parse_string expr "4*(1+2)");
true

let eq' = eq ~printer:(errpp Q.Print.bool) ~cmp:(erreq ( = ));;

eq' (Ok true) (parse_string (U.bool <* eoi) "true");;
eq' (Error "") (parse_string (U.bool <* eoi) "true ");;
eq' (Ok true) (parse_string (U.bool <* skip_white <* eoi) "true")

let eq' = eq ~printer:Q.Print.(pair int int);;

eq' (0, 5)
  (let p = any_char_n 5 *> pos in
   match parse_string p "abcde   " with
   | Ok p -> Position.line_and_column p
   | Error _ -> assert false)
;;

eq
  ~printer:Q.Print.(list @@ pair int int)
  [ 0, 2; 1, 3; 2, 1; 3, 0; 4, 0; 5, 2 ]
  (let p = each_line (skip_space *> pos) in
   match parse_string p "  a\n  b\nc\n\n\n a" with
   | Ok ps -> List.map Position.line_and_column ps
   | Error _ -> assert false)

let eq' = eq ~printer:(errpp Q.Print.string) ~cmp:(erreq ( = ));;

eq' (Ok "abcd") (parse_string all_str "abcd");;
eq' (Ok "cd") (parse_string (string "ab" *> all_str) "abcd");;
eq' (Ok "") (parse_string (string "ab" *> all_str) "ab");;

eq
  ~printer:(errpp Q.Print.(pair string string))
  ~cmp:(erreq ( = ))
  (Ok ("foobar", ""))
  (parse_string (both all_str all_str) "foobar")
;;

q
  Q.(printable_string)
  (fun s ->
    let pred = function
      | 'a' .. 'z' | 'A' .. 'Z' | '{' | '}' -> true
      | _ -> false
    in
    let p1 = chars1_if pred in
    let p2 = take1_if pred >|= Slice.to_string in
    parse_string p1 s = parse_string p2 s)
;;

t @@ fun () ->
let pred = function
  | 'a' .. 'z' | 'A' .. 'Z' | '{' | '}' -> true
  | _ -> false
in
parse_string (chars_if pred) "coucou{lol} 123" = Ok "coucou{lol}"
;;

t @@ fun () ->
let p0 = skip_white *> U.int in
let p = skip_white *> char '(' *> many p0 <* (skip_white <* char ')') in
let printer = CCFormat.(to_string @@ Dump.result @@ Dump.list int) in
assert_equal ~printer (Ok [ 1; 2; 3 ]) (parse_string p "(1 2 3)");
assert_equal ~printer (Ok [ 1; 2; -30; 4 ]) (parse_string p "( 1 2    -30 4 )");
true

let aword =
  chars1_if (function
    | 'a' .. 'z' | 'A' .. 'Z' -> true
    | _ -> false)
;;

eq
  ~printer:(errpp Q.Print.(list string))
  (Ok [ "a"; "b"; "c" ])
  (parse_string (optional (char '/') *> sep ~by:(char '/') aword) "/a/b/c")
;;

eq
  ~printer:(errpp Q.Print.(list string))
  (Ok [ "a"; "b"; "c" ])
  (parse_string (optional (char '/') *> sep ~by:(char '/') aword) "a/b/c")
;;

eq
  ~printer:(errpp Q.Print.(string))
  (Ok "abc")
  (parse_string (lookahead (string "ab") *> string "abc") "abcd")
;;

eq
  ~printer:(errpp Q.Print.(string))
  (Ok "1234")
  (parse_string line_str "1234\nyolo")
;;

eq
  ~printer:(errpp Q.Print.(pair String.escaped String.escaped))
  (Ok ("1234", "yolo"))
  (parse_string (line_str ||| line_str) "1234\nyolo\nswag")
;;

eq
  ~printer:(errpp Q.Print.(list string))
  ~cmp:(erreq ( = ))
  (Ok [ "a"; "b"; "c"; "d,e,f" ])
  (parse_string
     (split_list_at_most ~on_char:',' 3 >|= List.map Slice.to_string)
     "a,b,c,d,e,f")
;;

eq
  ~printer:(errpp Q.Print.(list string))
  ~cmp:(erreq ( = ))
  (Ok [ "a"; "bc" ])
  (parse_string
     (split_list_at_most ~on_char:',' 3 >|= List.map Slice.to_string)
     "a,bc")
;;

eq
  ~printer:(errpp Q.Print.(list @@ list int))
  (Ok [ [ 1; 1 ]; [ 2; 2 ]; [ 3; 3 ]; [] ])
  (parse_string (each_line (sep ~by:skip_space U.int)) "1 1\n2 2\n3   3\n")

let eq' = eq ~printer:(errpp Q.Print.int) ~cmp:(erreq ( = ));;

eq' (Ok 42) (parse_string U.int " 42");;
eq' (Ok 2) (parse_string U.int "2");;
eq' (Error "") (parse_string U.int "abc");;
eq' (Error "") (parse_string U.int "")

let eq' = eq ~printer:(errpp Q.Print.int) ~cmp:(erreq ( = ));;

eq' (Ok 15) (parse_string (U.in_paren (U.in_paren U.int)) "( ( 15) )");;
eq' (Ok 2) (parse_string (U.in_paren U.int) "(2)");;
eq' (Error "") (parse_string (U.in_paren U.int) "2");;
eq' (Error "") (parse_string (U.in_paren U.int) "");;
eq' (Ok 2) (parse_string (U.in_parens_opt U.int) "((((2))))");;
eq' (Ok 2) (parse_string (U.in_parens_opt U.int) "2");;
eq' (Ok 200) (parse_string (U.in_parens_opt U.int) "( (  200 ) )")

let eq' = eq ~printer:(errpp Q.Print.(option int)) ~cmp:(erreq ( = ));;

eq' (Ok (Some 12)) (parse_string U.(option int) " Some 12");;
eq' (Ok None) (parse_string U.(option int) "  None");;
eq' (Ok (Some 0)) (parse_string U.(option int) "Some 0");;
eq' (Ok (Some 0)) (parse_string U.(in_parens_opt @@ option int) "(( Some 0) )")

let eq' = eq ~printer:(errpp Q.Print.int) ~cmp:(erreq ( = ));;

eq' (Ok 16) (parse_string U.hexa_int "0x10");;
eq' (Ok 16) (parse_string U.hexa_int "10");;
eq' (Error "") (parse_string U.hexa_int "x10");;
eq' (Error "") (parse_string U.hexa_int "0xz");;

eq ~printer:(errpp Q.Print.bool) ~cmp:(erreq ( = )) (Ok true)
  (parse_string U.bool "true")
;;

eq ~printer:(errpp Q.Print.bool) ~cmp:(erreq ( = )) (Ok false)
  (parse_string U.bool "false")
;;

eq
  ~printer:Q.Print.(errpp (pair int int))
  (Ok (1, 2))
  U.(parse_string (pair int int) "(1 , 2 )")