using System.Collections.Generic;
using AspectedRouting.IO.LuaSkeleton;
using AspectedRouting.Language;
using AspectedRouting.Language.Functions;
using Xunit;

namespace AspectedRouting.Test
{
    public class LuaPrinterTest
    {
        [Fact]
        public void ToLua_SimpleMapping_Table()
        {
            var mapping = new Mapping(
                new[] { "a", "b", "c" },
                new[] {
                    new Constant(5),
                    new Constant(6),
                    new Constant(7)
                }
            );

            var luaPrinter = new LuaSkeleton(new Context(), false);
            var result = luaPrinter.MappingToLua(mapping);

            Assert.Equal(
                "{\n    a = 5,\n    b = 6,\n    c = 7\n}"
                , result);
        }

        [Fact]
        public void ToLua_NestedMapping_Table()
        {
            var mapping = new Mapping(
                new[] { "a" },
                new[] {
                    new Mapping(new[] { "b" },
                        new[] {
                            new Constant(42)
                        }
                    )
                }
            );
            var luaPrinter = new LuaSkeleton(new Context(), false);
            var result = luaPrinter.MappingToLua(mapping);
            Assert.Equal("{\n    a = {\n        b = 42\n    }\n}", result);
        }

        [Fact]
        public void Sanity_EveryBasicFunction_HasDescription()
        {
            var missing = new List<string>();
            foreach (var (_, f) in Funcs.Builtins) {
                if (string.IsNullOrEmpty(f.Description)) {
                    missing.Add(f.Name);
                }
            }

            Assert.True(0 == missing.Count,
                "These functions do not have a description: " + string.Join(", ", missing));
        }

        [Fact]
        public void Sanity_EveryBasicFunction_HasArgNames()
        {
            var missing = new List<string>();
            foreach (var (_, f) in Funcs.Builtins) {
                if (f.ArgNames == null) {
                    missing.Add(f.Name);
                }
            }

            Assert.True(0 == missing.Count,
                "These functions do not have a description: " + string.Join(", ", missing));
        }
    }
}