#include "application/commands/AddItem.h"
#include "domain/entities/Item.h"
#include "mocks/MockItemRepository.h"
#include "mocks/MockTimeProvider.h"
#include "mocks/MockOrderService.h"
#include "helpers/AddItemTestHelpers.h"
#include <catch2/catch_test_macros.hpp>
#include <catch2/matchers/catch_matchers_string.hpp>
#include <trompeloeil.hpp>
#include <memory>
#include <stdexcept>

using trompeloeil::_;

using namespace nxl::autostore;
using namespace std::chrono;

TEST_CASE("AddItem Unit Tests", "[unit][AddItem]")
{
  test::MockItemRepository mockRepository;
  test::MockTimeProvider mockClock;
  test::MockOrderService mockOrderService;

  SECTION(
    "when user id is present and item is not expired then the item is saved")
  {
    // Given
    auto testItem = test::createTestItem();
    auto expectedItemId = "saved_item_id";

    REQUIRE_CALL(mockRepository, save(testItem)).RETURN(expectedItemId);
    REQUIRE_CALL(mockClock, now()).RETURN(test::TEST_TIMEPOINT_NOW);
    FORBID_CALL(mockOrderService, orderItem(_));

    application::AddItem addItem(mockRepository, mockClock, mockOrderService);

    // When
    auto resultItemId = addItem.execute(std::move(testItem));

    // Then
    REQUIRE(resultItemId == expectedItemId);
  }

  SECTION("when item has null user id then a runtime error is thrown")
  {
    // Given
    auto testItem = test::createTestItem();
    testItem.userId = domain::User::NULL_ID;

    FORBID_CALL(mockRepository, save(_));
    FORBID_CALL(mockClock, now());
    FORBID_CALL(mockOrderService, orderItem(_));

    application::AddItem addItem(mockRepository, mockClock, mockOrderService);

    // When & Then
    REQUIRE_THROWS_AS(addItem.execute(std::move(testItem)), std::runtime_error);
  }

  SECTION("when item is expired then the order is placed")
  {
    // Given
    auto testItem = test::createExpiredTestItem();

    REQUIRE_CALL(mockClock, now()).RETURN(test::TEST_TIMEPOINT_NOW);
    REQUIRE_CALL(mockOrderService, orderItem(_));
    FORBID_CALL(mockRepository, save(_));

    application::AddItem addItem(mockRepository, mockClock, mockOrderService);

    // When
    addItem.execute(std::move(testItem));

    // Then
    // Order was placed (verified by REQUIRE_CALL above)
  }

  SECTION("when item is expired then null id is returned")
  {
    // Given
    auto testItem = test::createExpiredTestItem();

    REQUIRE_CALL(mockClock, now()).RETURN(test::TEST_TIMEPOINT_NOW);
    REQUIRE_CALL(mockOrderService, orderItem(_));
    FORBID_CALL(mockRepository, save(_));

    application::AddItem addItem(mockRepository, mockClock, mockOrderService);

    // When
    auto resultItemId = addItem.execute(std::move(testItem));

    // Then
    REQUIRE(resultItemId == domain::Item::NULL_ID);
  }

  SECTION("when item expiration date is exactly current time then the order is "
          "placed")
  {
    // Given
    auto testItem = test::createTestItem();
    testItem.expirationDate = test::TEST_TIMEPOINT_NOW;

    REQUIRE_CALL(mockClock, now()).RETURN(test::TEST_TIMEPOINT_NOW);
    REQUIRE_CALL(mockOrderService, orderItem(_));
    FORBID_CALL(mockRepository, save(_));

    application::AddItem addItem(mockRepository, mockClock, mockOrderService);

    // When
    addItem.execute(std::move(testItem));

    // Then
    // Order was placed (verified by REQUIRE_CALL above)
  }

  SECTION("when item expiration date is exactly current time then null id is "
          "returned")
  {
    // Given
    auto testItem = test::createTestItem();
    testItem.expirationDate = test::TEST_TIMEPOINT_NOW;

    REQUIRE_CALL(mockClock, now()).RETURN(test::TEST_TIMEPOINT_NOW);
    REQUIRE_CALL(mockOrderService, orderItem(_));
    FORBID_CALL(mockRepository, save(_));

    application::AddItem addItem(mockRepository, mockClock, mockOrderService);

    // When
    auto resultItemId = addItem.execute(std::move(testItem));

    // Then
    REQUIRE(resultItemId == domain::Item::NULL_ID);
  }

  SECTION("when item expiration date is in the future then the item is saved")
  {
    // Given
    auto testItem = test::createTestItem();
    auto expectedItemId = "saved_item_id";

    REQUIRE_CALL(mockClock, now()).RETURN(test::TEST_TIMEPOINT_NOW);
    REQUIRE_CALL(mockRepository, save(testItem)).RETURN(expectedItemId);
    FORBID_CALL(mockOrderService, orderItem(_));

    application::AddItem addItem(mockRepository, mockClock, mockOrderService);

    // When
    addItem.execute(std::move(testItem));

    // Then
    // Item was saved (verified by REQUIRE_CALL above)
  }

  SECTION(
    "when item expiration date is in the future then the item id is returned")
  {
    // Given
    auto testItem = test::createTestItem();
    auto expectedItemId = "saved_item_id";

    REQUIRE_CALL(mockClock, now()).RETURN(test::TEST_TIMEPOINT_NOW);
    REQUIRE_CALL(mockRepository, save(testItem)).RETURN(expectedItemId);
    FORBID_CALL(mockOrderService, orderItem(_));

    application::AddItem addItem(mockRepository, mockClock, mockOrderService);

    // When
    auto resultItemId = addItem.execute(std::move(testItem));

    // Then
    REQUIRE(resultItemId == expectedItemId);
  }

  SECTION(
    "when repository save throws exception then a runtime error is thrown")
  {
    // Given
    auto testItem = test::createTestItem();
    auto expectedException = std::runtime_error("Repository error");

    REQUIRE_CALL(mockClock, now()).RETURN(test::TEST_TIMEPOINT_NOW);
    REQUIRE_CALL(mockRepository, save(testItem)).THROW(expectedException);
    FORBID_CALL(mockOrderService, orderItem(_));

    application::AddItem addItem(mockRepository, mockClock, mockOrderService);

    // When & Then
    REQUIRE_THROWS_AS(addItem.execute(std::move(testItem)), std::runtime_error);
  }

  SECTION("when order service throws exception then a runtime error is thrown")
  {
    // Given
    auto testItem = test::createExpiredTestItem();
    auto expectedException = std::runtime_error("Order service error");

    REQUIRE_CALL(mockClock, now()).RETURN(test::TEST_TIMEPOINT_NOW);
    REQUIRE_CALL(mockOrderService, orderItem(_)).THROW(expectedException);
    FORBID_CALL(mockRepository, save(_));

    application::AddItem addItem(mockRepository, mockClock, mockOrderService);

    // When & Then
    REQUIRE_THROWS_AS(addItem.execute(std::move(testItem)), std::runtime_error);
  }

  SECTION("when clock throws exception then a runtime error is thrown")
  {
    // Given
    auto testItem = test::createTestItem();
    auto expectedException = std::runtime_error("Clock error");

    REQUIRE_CALL(mockClock, now()).THROW(expectedException);
    FORBID_CALL(mockRepository, save(_));
    FORBID_CALL(mockOrderService, orderItem(_));

    application::AddItem addItem(mockRepository, mockClock, mockOrderService);

    // When & Then
    REQUIRE_THROWS_AS(addItem.execute(std::move(testItem)), std::runtime_error);
  }
}