#include <catch2/catch_test_macros.hpp>

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

namespace {

double AbsDiff(double a, double b) {
  const double d = a - b;
  return d < 0 ? -d : d;
}

}  // namespace

TEST_CASE("source crystal deposit withdraw interest and settings") {
  auto db = csp::db::SqliteDb::OpenMemory();
  csp::db::ApplyMigrations(db);
  csp::db::SeedDemoData(db);

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

  csp::services::SourceCrystalService crystal(db);

  const auto s0 = crystal.GetSummary(user.user_id);
  REQUIRE(s0.user_id == user.user_id);
  REQUIRE(AbsDiff(s0.balance, 0.0) < 1e-9);
  REQUIRE(s0.monthly_interest_rate >= 0.0);

  const auto d1 = crystal.Deposit(user.user_id, 100.0, "initial deposit");
  REQUIRE(d1.tx_type == "deposit");
  REQUIRE(AbsDiff(d1.amount, 100.0) < 1e-9);
  REQUIRE(d1.balance_after > 99.99);

  const auto w1 = crystal.Withdraw(user.user_id, 30.0, "buy resources");
  REQUIRE(w1.tx_type == "withdraw");
  REQUIRE(AbsDiff(w1.amount, -30.0) < 1e-9);
  REQUIRE(w1.balance_after > 69.99);
  REQUIRE(w1.balance_after < 70.01);

  db.Exec("UPDATE source_crystal_accounts "
          "SET last_interest_at = last_interest_at - 7776000 "
          "WHERE user_id=" + std::to_string(user.user_id));
  db.Exec("UPDATE source_crystal_transactions "
          "SET created_at = created_at - 7776000 "
          "WHERE user_id=" + std::to_string(user.user_id));

  const auto s1 = crystal.GetSummary(user.user_id);
  REQUIRE(s1.balance > 72.0);
  REQUIRE(s1.balance < 75.0);

  const auto records = crystal.ListTransactions(user.user_id, 50);
  REQUIRE(records.size() >= 3);

  const auto cfg = crystal.UpdateMonthlyInterestRate(0.05);
  REQUIRE(AbsDiff(cfg.monthly_interest_rate, 0.05) < 1e-9);

  const auto cfg2 = crystal.GetSettings();
  REQUIRE(AbsDiff(cfg2.monthly_interest_rate, 0.05) < 1e-9);
}