#include "turns/domain/turn_order.hpp"

#include "turns/domain/participant.hpp"

#include <catch2/catch_test_macros.hpp>

#include <compare>

#include <glibmm/init.h>

namespace turns::domain::tests
{

  TEST_CASE("A freshly constructed turn order")
  {
    auto instance = turn_order::create();

    SECTION("can be created")
    {
      REQUIRE(instance);
    }

    SECTION("has 0 items")
    {
      REQUIRE(instance->n_participants() == 0);
    }

    SECTION("accepts a new participant in form of a refptr")
    {
      instance->append(participant::create("Honey Bunches of Oats", 12, disposition::friendly));
      REQUIRE(instance->n_participants() == 1);
    }

    SECTION("accepts a new participant in form of components")
    {
      instance->append("River along the Field", 14, disposition::friendly);
      REQUIRE(instance->n_participants() == 1);
    }

    SECTION("does nothing when trying to remove an item by refptr if no items were added beforehand")
    {
      instance->remove(participant::create("Patch in the Forest", 3, disposition::friendly));
      REQUIRE(instance->n_participants() == 0);
    }

    SECTION("does nothing when trying to remove an item by index if no items were added beforehand")
    {
      instance->remove(5);
      REQUIRE(instance->n_participants() == 0);
    }

    SECTION("allows the removal of an item by refptr if the same item was added beforehand")
    {
      auto item = participant::create("Blank Canvas", 23, disposition::friendly);
      instance->append(item);
      instance->remove(item);
      REQUIRE(instance->n_participants() == 0);
    }

    SECTION("does nothing when trying to remove an item by refptr that was not added beforehand")
    {
      auto item = participant::create("Blank Canvas", 23, disposition::friendly);
      instance->append(item);
      instance->remove(participant::create("Spell of Rain", 6, disposition::friendly));
      REQUIRE(instance->n_participants() == 1);
    }

    SECTION("automatically sorts appended refptrs in descending order of priority")
    {
      SECTION("when appending the higher one last")
      {
        instance->append(participant::create("Snow on the Field", 2, disposition::friendly));
        instance->append(participant::create("Bees behind the Cottage", 8, disposition::friendly));
        REQUIRE(instance->get_participant(0)->get_name() == "Bees behind the Cottage");
      }

      SECTION("when appending the higher one first")
      {
        instance->append(participant::create("Bees behind the Cottage", 8, disposition::friendly));
        instance->append(participant::create("Snow on the Field", 2, disposition::friendly));
        REQUIRE(instance->get_participant(0)->get_name() == "Bees behind the Cottage");
      }

      SECTION("keeping the insertion order when appending items with equal priority")
      {
        instance->append(participant::create("Snow on the Field", 8, disposition::friendly));
        instance->append(participant::create("Bees behind the Cottage", 8, disposition::friendly));
        REQUIRE(instance->get_participant(0)->get_name() == "Snow on the Field");
      }
    }

    SECTION("automatically sorts elements appended by components in descending order of priority")
    {
      SECTION("when appending the higher one last")
      {
        instance->append("Tree Blossom", 6, disposition::friendly);
        instance->append("Fish in the River", 12, disposition::friendly);
        REQUIRE(instance->get_participant(0)->get_name() == "Fish in the River");
      }

      SECTION("when appending the higher one first")
      {
        instance->append("Fish in the River", 12, disposition::friendly);
        instance->append("Tree Blossom", 6, disposition::friendly);
        REQUIRE(instance->get_participant(0)->get_name() == "Fish in the River");
      }

      SECTION("keeping the insertion order when appending items with equal priority")
      {
        instance->append("Fish in the River", 6, disposition::friendly);
        instance->append("Tree Blossom", 6, disposition::friendly);
        REQUIRE(instance->get_participant(0)->get_name() == "Fish in the River");
      }
    }

    SECTION("does not accept the same item twice by the same refptr")
    {
      auto item = participant::create("Angelic Berry", 9, disposition::friendly);
      instance->append(item);
      instance->append(item);
      REQUIRE(instance->n_participants() == 1);
    }

    SECTION("does not accept the same item twice by different refptrs")
    {
      auto item_one = participant::create("Misty Meadow", 14.2, disposition::friendly);
      auto item_two = participant::create("Misty Meadow", 14.2, disposition::friendly);
      instance->append(item_one);
      instance->append(item_two);
      REQUIRE(instance->n_participants() == 1);
    }

    SECTION("does not accept the same item twice by components")
    {
      instance->append("Frozen Apple Tree", 2.1, disposition::friendly);
      instance->append("Frozen Apple Tree", 2.1, disposition::friendly);
      REQUIRE(instance->n_participants() == 1);
    }
  }

}  // namespace turns::domain::tests