defmodule Eflatbuffers.SchemaTest do
  use ExUnit.Case

  @expected_simple %{
      namespace: :"SyGame.Play",
      include: "some_other.fbs",
      attribute: "priority",
      file_identifier: "FOOO",
      file_extension: "baa",
      root_type: :Monster
    }

  @expected_table %{:Monster =>
    { :table,
      [
        name: :string,
        pos_: :Vec3,
        inventory: {:vector, :ubyte},
        etrue: :bool,
        mana: {:int, 150},
        hp: {:foo, -100},
        fl: {:float, 1.5},
        fl2: {:float, -1_512.3},
        waa: {:bool, :true},
        frie: :ool,
        friendly: {:bool, false}
      ]
    }
  }

  @expected_enum %{:Color =>
    {
      {:enum, :byte},
      [
        :Red,
        :Green,
        :Blue
      ]
    }
  }

  @expected_union %{:Animal =>
    {
      :union,
      [
        :Dog,
        :Cat,
        :Mouse
      ]
    }
  }

  test "parse simple schema" do
    res =
      File.read!("test/schemas/parser_simple.fbs")
      |> Eflatbuffers.Schema.lexer
      |> :schema_parser.parse()

    assert {:ok, { %{}, @expected_simple} } == res
  end

  test "parse schema with table" do
    res =
      File.read!("test/schemas/parser_table.fbs")
      |> Eflatbuffers.Schema.lexer
      |> :schema_parser.parse()

    assert {:ok, {@expected_table, %{}}} == res
  end

  test "parse schema with enum" do
    res =
      File.read!("test/schemas/parser_enum.fbs")
      |> Eflatbuffers.Schema.lexer
      |> :schema_parser.parse()

    assert {:ok, {@expected_enum, %{}}} == res
  end

  test "parse schema with union" do
    res =
      File.read!("test/schemas/parser_union.fbs")
      |> Eflatbuffers.Schema.lexer
      |> :schema_parser.parse()

    assert {:ok, {@expected_union, %{}}} == res
  end

  test "parse a whole schema" do
    res =
      ["test/schemas/parser_simple.fbs", "test/schemas/parser_table.fbs", "test/schemas/parser_union.fbs", "test/schemas/parser_enum.fbs", ]
      |> Enum.map(fn(file) -> File.read!(file) end)
      |> Enum.join("\n")
      |> Eflatbuffers.Schema.lexer
      |> :schema_parser.parse()
    assert {:ok, {Map.merge(@expected_table, @expected_enum) |> Map.merge(@expected_union), @expected_simple}} == res
  end

  test "decorate table" do
    parsed_entities = %{
      :table_inner =>
        {:table, [field: :int, field_int_default: {:int, 23}]},
      :table_outer =>
        {:table, [table_field: :table_inner, table_vector: {:vector, :table_inner}]}
    }
    decorated_entities =
    %{table_inner: {:table,
               %{fields: [field: {:int, %{default: 0}}, field_int_default: {:int, %{default: 23}}],
                 indices: %{field: {0, {:int, %{default: 0}}}, field_int_default: {1, {:int, %{default: 23}}}}}},
              table_outer: {:table,
               %{fields: [table_field: {:table, %{name: :table_inner}}, table_vector: {:vector, %{type: {:table, %{name: :table_inner}}}}],
                 indices: %{table_field: {0, {:table, %{name: :table_inner}}}, table_vector: {1, {:vector, %{type: {:table, %{name: :table_inner}}}}}}}}}
    assert {decorated_entities, %{}} == Eflatbuffers.Schema.decorate({parsed_entities, %{}})
  end

  test "decorate enumerable" do
    parsed_entities = %{
      :enum_inner =>
        {{:enum, :byte}, [:Red, :Green, :Blue]},
      :table_outer =>
        {:table, [enum_field: :enum_inner, enum_vector: {:vector, :enum_inner}]}
    }
    decorated_entities =
    %{enum_inner: {:enum, %{members: %{0 => :Red, 1 => :Green, 2 => :Blue, :Blue => 2, :Green => 1, :Red => 0}, type: {:byte, %{default: 0}}}},
              table_outer: {:table,
               %{fields: [enum_field: {:enum, %{name: :enum_inner}}, enum_vector: {:vector, %{type: {:enum, %{name: :enum_inner}}}}],
                 indices: %{enum_field: {0, {:enum, %{name: :enum_inner}}}, enum_vector: {1, {:vector, %{type: {:enum, %{name: :enum_inner}}}}}}}}}
    assert {decorated_entities, %{}} == Eflatbuffers.Schema.decorate({parsed_entities, %{}})
  end

  test "decorate union" do
    parsed_entities = %{
      :union_inner =>
        {:union, [:hello, :bye]},
      :table_outer =>
        {:table, [union_field: :union_inner, union_vector: {:vector, :union_inner}]}
    }
    decorated_entities =
    %{table_outer: {:table,
               %{fields: [union_field: {:union, %{name: :union_inner}}, union_vector: {:vector, %{type: {:union, %{name: :union_inner}}}}],
                 indices: %{union_field: {0, {:union, %{name: :union_inner}}}, union_vector: {2, {:vector, %{type: {:union, %{name: :union_inner}}}}}}}},
              union_inner: {:union, %{members: %{0 => :hello, 1 => :bye, :bye => 1, :hello => 0}}}}
    assert {decorated_entities, %{}} == Eflatbuffers.Schema.decorate({parsed_entities, %{}})
  end

  test "parse doge schemas" do
    File.ls!("test/complex_schemas")
    |> Enum.filter(fn(file) -> String.contains?(file, ".fbs") end)
    |> Enum.map(fn(file) -> File.read!(Path.join("test/complex_schemas", file)) end)
    |> Enum.map(fn(schema_str) -> assert {:ok, _} = Eflatbuffers.Schema.parse(schema_str) end)
  end

end