module Tree = Qsp_syntax.Tree
module Ast = Tree.Ast
module Check = Qsp_syntax.Check
module S = Qsp_syntax.S
module T = Qsp_syntax.T

let _test_instruction = Syntax._test_instruction
let _position = Syntax._position

let result =
  [
    Tree.Ast.Expression
      (Tree.Ast.Literal
         ( _position,
           [
             T.Expression (Tree.Ast.Literal (_position, [ T.Text "key" ]));
             T.Text "";
           ] ));
  ]

(* String and escaped delimiter *)

let nested_squote () = _test_instruction {|'<<''key''>>'|} result
let nested_dquote () = _test_instruction {|"<<""key"">>"|} result
let long_quote () = _test_instruction {|{<<{key}>>}|} result

(* Mix bewteen string enclosing *)

let nested_string_literal2 () = _test_instruction {|"<<'key'>>"|} result
let nested_string_literal4 () = _test_instruction {|{<<'key'>>}|} result

(* The current state shall remain when we are inside an expression. *)

let nested_string_expression1 () = _test_instruction {|'<<(''key'')>>'|} result
let nested_string_expression2 () = _test_instruction {|"<<('key')>>"|} result

(* The block shall also interpreted when inside a comment *)

let nested_comment () =
  _test_instruction {|!'<<expr>>'|} [ Tree.Ast.Comment _position ];
  _test_instruction {|!"<<expr>>"|} [ Tree.Ast.Comment _position ];
  _test_instruction {|!{<<expr>>}|} [ Tree.Ast.Comment _position ]

let comment2 () =
  _test_instruction {|!"text <<expr>>"|} [ Tree.Ast.Comment _position ];
  _test_instruction {|!{text <<expr>>}|} [ Tree.Ast.Comment _position ];
  _test_instruction {|!'text <<expr>>'|} [ Tree.Ast.Comment _position ]

(** A single quote inside a string does not mean we are starting nested string
 *)
let direct_text () =
  _test_instruction {|"don't"|}
    [ Tree.Ast.Expression (Tree.Ast.Literal (_position, [ T.Text "don't" ])) ];
  _test_instruction {|'don"t'|}
    [ Tree.Ast.Expression (Tree.Ast.Literal (_position, [ T.Text "don\"t" ])) ];
  _test_instruction {|'don{t'|}
    [ Tree.Ast.Expression (Tree.Ast.Literal (_position, [ T.Text "don{t" ])) ]

let elements_sequence () =
  _test_instruction {|"'<<$array[''key'']>>'"|}
    [
      Tree.Ast.Expression
        (Tree.Ast.Literal (_position, [ T.Text "'<<$array[''key'']>>'" ]));
    ]

let expression () =
  _test_instruction {|'<<iif(var=0,1,0)>>'|}
    [
      Tree.Ast.Expression
        (Tree.Ast.Literal
           ( _position,
             [
               T.Expression
                 (Tree.Ast.Function
                    ( _position,
                      T.Iif,
                      [
                        Tree.Ast.BinaryOp
                          ( _position,
                            T.Eq,
                            Tree.Ast.Ident
                              {
                                Tree.Ast.pos = _position;
                                name = "VAR";
                                index = None;
                                local = false;
                              },
                            Tree.Ast.Integer (_position, "0") );
                        Tree.Ast.Integer (_position, "1");
                        Tree.Ast.Integer (_position, "0");
                      ] ));
               T.Text "";
             ] ));
    ]

let test =
  ( "Literals",
    [
      Alcotest.test_case "Nested squote" `Quick nested_squote;
      Alcotest.test_case "Nested string with literal2" `Quick
        nested_string_literal2;
      Alcotest.test_case "Nested dquote" `Quick nested_dquote;
      Alcotest.test_case "Nested string with literal4" `Quick
        nested_string_literal4;
      Alcotest.test_case "Nested long_quote" `Quick long_quote;
      Alcotest.test_case "Nested string with expression1" `Quick
        nested_string_expression1;
      Alcotest.test_case "Nested string with expression2" `Quick
        nested_string_expression2;
      Alcotest.test_case "Nested comment" `Quick nested_comment;
      Alcotest.test_case "Comment2" `Quick comment2;
      Alcotest.test_case "Quote in string" `Quick direct_text;
      Alcotest.test_case "elements_sequence" `Quick elements_sequence;
      Alcotest.test_case "expression" `Quick expression;
    ] )