/**
 * Copyright (C) 2022, Dmitriy Pleshevskiy <dmitriy@pleshevski.ru>
 *
 * nix2lua is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * nix2lua is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with nix2lua.  If not, see <https://www.gnu.org/licenses/>.
 */
{ pkgs ? import <nixpkgs> { } }:

let
  nix2lua = import ./lib.nix;
  inherit (builtins) tryEval;

  failed = { success = false; value = false; };
in
with nix2lua; pkgs.lib.runTests {
  "test returns null" = {
    expr = toLua null;
    expected = null;
  };
  "test returns nil" = {
    expr = toLua LuaNil;
    expected = "nil";
  };
  "test returns a lua string" = {
    expr = toLua "hello world";
    expected = "\"hello world\"";
  };
  "test returns a path as a lua string" = {
    expr = toLua /hello/world;
    expected = "\"/hello/world\"";
  };
  "test returns an integer number" = {
    expr = toLua 10;
    expected = "10";
  };
  "test returns a negative integer number" = {
    expr = toLua (-10);
    expected = "-10";
  };
  "test returns a float number" = {
    expr = toLua 10.1;
    expected = "10.100000";
  };
  "test returns true" = {
    expr = toLua true;
    expected = "true";
  };
  "test returns false" = {
    expr = toLua false;
    expected = "false";
  };
  "test returns table with all primitive types" = {
    expr = toLua [ "hello" 10 10.1 true ];
    expected = "{ \"hello\", 10, 10.100000, true }";
  };
  "test returns table without null values" = {
    expr = toLua [ null "hello" null 10 null 10.1 null true null ];
    expected = "{ \"hello\", 10, 10.100000, true }";
  };
  "test returns named table" = {
    expr = toLua {
      foo = "hello";
      int = 10;
      float = 10.1;
      success = true;
      fail = false;
    };
    expected = "{ [\"fail\"] = false, [\"float\"] = 10.100000, [\"foo\"] = \"hello\", [\"int\"] = 10, [\"success\"] = true }";
  };
  "test returns named table without nullable items" = {
    expr = toLua { foo = "hello"; bar = null; };
    expected = "{ [\"foo\"] = \"hello\" }";
  };
  "test returns recursive named table" = {
    expr = toLua {
      first = {
        second = {
          last = "hello";
        };
      };
    };
    expected = "{ [\"first\"] = { [\"second\"] = { [\"last\"] = \"hello\" } } }";
  };
  "test return recursive table" = {
    expr = toLua [ [ [ "foo" ] "bar" ] ];
    expected = "{ { { \"foo\" }, \"bar\" } }";
  };
  "test returns table with one named field" = {
    expr = toLua [
      "foo"
      (namedField "foo" "hello")
      10
    ];
    expected = "{ \"foo\", [\"foo\"] = \"hello\", 10 }";
  };
  "test returns raw string" = {
    expr = toLua (raw "hello");
    expected = "hello";
  };
  "test returns deep raw string" = {
    expr = toLua (raw (raw (raw "hello")));
    expected = "hello";
  };
  "test returns path as string" = {
    expr = toLua /foo/bar;
    expected = "\"/foo/bar\"";
  };
  "test throws an error when you try to use named field withoun table" = {
    expr = tryEval (toLua (namedField "foo" "bar"));
    expected = failed;
  };
  "test returns call function with arguments" = {
    expr = toLua (call "root_pattern" [ "deno.json" "deno.jsonc" ]);
    expected = "root_pattern(\"deno.json\", \"deno.jsonc\")";
  };
  "test returns concated lines" = {
    expr = toLua (concatLines [
      (call "foo" [ 1 2 ])
      (call "bar" [ "baz" "biz" ])
    ]);
    expected = ''
      foo(1, 2)
      bar("baz", "biz")
    '';
  };
  "test returns a pipe with many function call" = {
    expr = toLua (pipe [
      (require "nvim-treesitter.parsers")
      (call "get_parser_configs" [ ])
    ]);
    expected = "require(\"nvim-treesitter.parsers\").get_parser_configs()";
  };
  "test returns lua with setting value to the variable" = {
    expr = toLua (set "parser_config.d2" { });
    expected = "parser_config.d2 = {  }";
  };
  "test returns lua with setting value to the local variable" = {
    expr = toLua (local (set "parser_config.d2" { }));
    expected = "local parser_config.d2 = {  }";
  };
  "test returns all operations" = {
    expr = toLua (concatLines [
      (eq (mul (add 1 2) (sub 2 1)) 3)
      (not (eq (mul (add 1 2) (sub 2 1)) 3))
      (not 10)
      (gt 10 5)
    ]);
    expected = ''
      (((1 + 2) * (2 - 1)) == 3)
      not (((1 + 2) * (2 - 1)) == 3)
      not 10
      (10 > 5)
    '';
  };
  "test returns defined function" = {
    expr = toLua (func "hello" [ "a" "b" ] [
      (eq (mul (add (var "a") 2) (sub 2 1)) 3)
      (not (eq (mul (add (var "b") 2) (sub 2 1)) 3))
      (not 10)
      (gt 10 5)
    ]);
    expected = ''
      function hello(a, b)
      (((a + 2) * (2 - 1)) == 3)
      not (((b + 2) * (2 - 1)) == 3)
      not 10
      (10 > 5)
      end
    '';
  };
  "test returns if statement" = {
    expr = toLua (if' (eq 10 10) [
      (call "print" [ 10 ])
    ]);
    expected = ''
      if (10 == 10) then
      print(10)
      end
    '';
  };
  "test returns if else statement" = {
    expr = toLua (ifelse (eq 10 10) [
      (call "print" [ "10 == 10" ])
    ] [
      (call "print" [ "10 != 10" ])
    ]);
    expected = ''
      if (10 == 10) then
      print("10 == 10")
      else
      print("10 != 10")
      end
    '';
  };
  "test returns a deep if else statement" = {
    expr = toLua (ifelse (eq 10 10) [
      (if' true [ (call "print" [ "yes" ]) ])
    ] [
      (if' true [ (call "print" [ "no" ]) ])
    ]);
    expected = ''
      if (10 == 10) then
      if true then
      print("yes")
      end

      else
      if true then
      print("no")
      end

      end
    '';
  };
  "test returns a returns keyword" = {
    expr = toLua (ifelse (eq 10 10) [
      return_void
    ] [
      (return 10)
    ]);
    expected = ''
      if (10 == 10) then
      return
      else
      return 10
      end
    '';
  };
}