#include <catch2/catch_test_macros.hpp>

#include "csp/db/sqlite_db.h"
#include "csp/services/auth_service.h"
#include "csp/services/experience_service.h"

TEST_CASE("experience only increases on rating gains") {
  auto db = csp::db::SqliteDb::OpenMemory();
  csp::db::ApplyMigrations(db);
  csp::db::SeedDemoData(db);

  csp::services::AuthService auth(db);
  const auto user = auth.Register("xp_user", "password123");

  csp::services::ExperienceService xp(db);

  const auto s0 = xp.GetSummary(user.user_id);
  REQUIRE(s0.user_id == user.user_id);
  REQUIRE(s0.experience >= 0);
  const int base_exp = s0.experience;

  db.Exec("UPDATE users SET rating=rating+10 WHERE id=" +
          std::to_string(user.user_id));
  const auto s1 = xp.GetSummary(user.user_id);
  REQUIRE(s1.experience == base_exp + 10);

  db.Exec("UPDATE users SET rating=rating-4 WHERE id=" +
          std::to_string(user.user_id));
  const auto s2 = xp.GetSummary(user.user_id);
  REQUIRE(s2.experience == base_exp + 10);

  db.Exec("UPDATE users SET rating=rating+3 WHERE id=" +
          std::to_string(user.user_id));
  const auto s3 = xp.GetSummary(user.user_id);
  REQUIRE(s3.experience == base_exp + 13);

  const auto rows = xp.ListHistory(user.user_id, 20);
  REQUIRE(rows.size() >= 2);
  REQUIRE(rows[0].xp_delta == 3);
  REQUIRE(rows[1].xp_delta == 10);
}