#include <catch2/catch_test_macros.hpp>

#include <matador/sql/condition.hpp>
#include <matador/sql/session.hpp>

#include <list>

using namespace matador::sql;

TEST_CASE("Create and drop table statement", "[session record]") {
  connection_pool<connection> pool("sqlite://sqlite.db", 4);
  session s(pool);

  auto res = s.create()
              .table("person", {
                make_pk_column<unsigned long>("id"),
                make_column<std::string>("name", 255),
                make_column<unsigned short>("age")
              })
              .execute();

  REQUIRE(res.second == R"(CREATE TABLE "person" ("id" BIGINT NOT NULL, "name" VARCHAR(255), "age" INTEGER, CONSTRAINT PK_person PRIMARY KEY (id)))");

  res = s.drop()
         .table("person")
         .execute();

  REQUIRE(res.second == R"(DROP TABLE "person")");
}

TEST_CASE("Execute insert record statement", "[session record]") {
  connection_pool<connection> pool("sqlite://sqlite.db", 4);
  session s(pool);

  auto res = s.create()
              .table("person", {
                make_pk_column<unsigned long>("id"),
                make_column<std::string>("name", 255),
                make_column<unsigned short>("age")
              })
              .execute();

  REQUIRE(res.first == 0);

  res = s.insert()
         .into("person", {"id", "name", "age"})
         .values({7, "george", 45})
         .execute();

  REQUIRE(res.first == 1);
  REQUIRE(res.second == R"(INSERT INTO "person" ("id", "name", "age") VALUES (7, 'george', 45))");

  auto result = s.select({"id", "name", "age"})
                 .from("person")
                 .fetch_all();

  for (const auto& i : result) {
    REQUIRE(i.size() == 3);
    REQUIRE(i.at(0).name() == "id");
    REQUIRE(i.at(0).type() == data_type_t::type_long_long);
    REQUIRE(i.at(0).as<long long>() == 7);
    REQUIRE(i.at(1).name() == "name");
    REQUIRE(i.at(1).type() == data_type_t::type_varchar);
    REQUIRE(i.at(1).as<std::string>() == "george");
    REQUIRE(i.at(2).name() == "age");
    REQUIRE(i.at(2).type() == matador::sql::data_type_t::type_int);
    REQUIRE(i.at(2).as<int>() == 45);
  }

  s.drop()
   .table("person")
   .execute();
}

TEST_CASE("Execute update record statement", "[session record]") {
  connection_pool<connection> pool("sqlite://sqlite.db", 4);
  session s(pool);

  auto res = s.create()
              .table("person", {
                make_pk_column<unsigned long>("id"),
                make_column<std::string>("name", 255),
                make_column<unsigned short>("age")
              })
              .execute();

  REQUIRE(res.first == 0);

  res = s.insert()
         .into("person", {"id", "name", "age"})
         .values({7, "george", 45})
         .execute();

  REQUIRE(res.first == 1);
  REQUIRE(res.second == R"(INSERT INTO "person" ("id", "name", "age") VALUES (7, 'george', 45))");

  res = s.update("person")
         .set({{"id", 7}, {"name", "jane"}, {"age", 35}})
         .where("id"_col == 7)
         .execute();

  REQUIRE(res.first == 1);
  REQUIRE(res.second == R"(UPDATE "person" SET "id"=7, "name"='jane', "age"=35 WHERE "id" = 7)");

  auto result = s.select({"id", "name", "age"})
                 .from("person")
                 .fetch_all();

  for (const auto& i : result) {
    REQUIRE(i.size() == 3);
    REQUIRE(i.at(0).name() == "id");
    REQUIRE(i.at(0).type() == data_type_t::type_long_long);
    REQUIRE(i.at(0).as<long long>() == 7);
    REQUIRE(i.at(1).name() == "name");
    REQUIRE(i.at(1).type() == data_type_t::type_varchar);
    REQUIRE(i.at(1).as<std::string>() == "jane");
    REQUIRE(i.at(2).name() == "age");
    REQUIRE(i.at(2).type() == matador::sql::data_type_t::type_int);
    REQUIRE(i.at(2).as<int>() == 35);
  }

  s.drop().table("person").execute();
}

TEST_CASE("Execute select statement with order by", "[session record]") {
  connection_pool<connection> pool("sqlite://sqlite.db", 4);
  session s(pool);

  auto res = s.create()
              .table("person", {
                make_pk_column<unsigned long>("id"),
                make_column<std::string>("name", 255),
                make_column<unsigned short>("age")
              })
              .execute();

  REQUIRE(res.first == 0);

  res = s.insert().into("person", {"id", "name", "age"}).values({1, "george", 45}).execute();
  REQUIRE(res.first == 1);
  res = s.insert().into("person", {"id", "name", "age"}).values({2, "jane", 32}).execute();
  REQUIRE(res.first == 1);
  res = s.insert().into("person", {"id", "name", "age"}).values({3, "michael", 67}).execute();
  REQUIRE(res.first == 1);
  res = s.insert().into("person", {"id", "name", "age"}).values({4, "bob", 13}).execute();
  REQUIRE(res.first == 1);

  auto result = s.select({"id", "name", "age"})
                 .from("person")
                 .where("id"_col == 8)
                 .order_by("name").desc()
                 .fetch_all();

  std::list<std::string> expected_names {"bob", "george", "jane", "michael"};
  for (const auto &p : result) {
    REQUIRE(p.at(1).str() == expected_names.front());
    expected_names.pop_front();
  }

  s.drop().table("person").execute();
}

TEST_CASE("Execute select statement with group by and order by", "[session record]") {
  connection_pool<connection> pool("sqlite://sqlite.db", 4);
  session s(pool);

  auto res = s.create()
              .table("person", {
                make_pk_column<unsigned long>("id"),
                make_column<std::string>("name", 255),
                make_column<unsigned short>("age")
              })
              .execute();

  res = s.insert().into("person", {"id", "name", "age"}).values({1, "george", 45}).execute();
  REQUIRE(res.first == 1);
  res = s.insert().into("person", {"id", "name", "age"}).values({2, "jane", 45}).execute();
  REQUIRE(res.first == 1);
  res = s.insert().into("person", {"id", "name", "age"}).values({3, "michael", 13}).execute();
  REQUIRE(res.first == 1);
  res = s.insert().into("person", {"id", "name", "age"}).values({4, "bob", 13}).execute();
  REQUIRE(res.first == 1);
  res = s.insert().into("person", {"id", "name", "age"}).values({5, "charlie", 67}).execute();
  REQUIRE(res.first == 1);

  auto result = s.select({alias(count("age"), "age_count"), "age"})
                 .from("person")
                 .group_by("age")
                 .order_by("age_count").asc()
                 .fetch_all();

  std::list<std::pair<int, int>> expected_values {{2, 13}, {2, 45}, {1, 67}};
  for (const auto &r : result) {
    REQUIRE(r.at(0).as<int>() == expected_values.front().first);
    REQUIRE(r.at(1).as<int>() == expected_values.front().second);
    expected_values.pop_front();
  }

  s.drop().table("person").execute();
}