#include "catch2/catch_test_macros.hpp"

#include "matador/sql/column_definition.hpp"
#include "matador/sql/condition.hpp"
#include "matador/sql/query_builder.hpp"
#include "matador/sql/session.hpp"

#include "connection.hpp"

#include "models/airplane.hpp"
#include "models/flight.hpp"
#include "models/person.hpp"

using namespace matador::sql;
using namespace matador::test;

class QueryFixture
{
public:
  QueryFixture()
  : db(matador::test::connection::dns)
  , schema(db.dialect().default_schema_name())
  {
    db.open();
  }

  ~QueryFixture()
  {
    drop_table_if_exists("flight");
    drop_table_if_exists("airplane");
    drop_table_if_exists("person");
  }

protected:
  matador::sql::connection db;
  matador::sql::schema schema;

private:
  void drop_table_if_exists(const std::string &table_name)
  {
    if (db.exists(table_name)) {
      db.query(schema).drop().table(table_name).execute();
    }
  }
};

TEST_CASE_METHOD(QueryFixture, "Create table with foreign key relation", "[session]")
{
  schema.attach<airplane>("airplane");
  schema.attach<flight>("flight");
  db.query(schema).create()
  .table<airplane>("airplane")
  .execute();

  REQUIRE(db.exists("airplane"));

  db.query(schema).create()
  .table<flight>("flight")
  .execute();

  REQUIRE(db.exists("flight"));

  db.query(schema).drop().table("flight").execute();
  db.query(schema).drop().table("airplane").execute();

  REQUIRE(!db.exists("flight"));
  REQUIRE(!db.exists("airplane"));
}

TEST_CASE_METHOD(QueryFixture, "Execute select statement with where clause", "[session]")
{
  schema.attach<person>("person");
  db.query(schema).create()
  .table<person>("person")
  .execute();

  person george{7, "george", 45};
  george.image.push_back(37);

  auto res = db.query(schema)
  .insert()
  .into<person>("person")
  .values(george)
  .execute();
  REQUIRE(res == 1);

  // fetch person as record
  auto result_record = db.query(schema).select<person>()
  .from("person")
  .where("id"_col == 7)
  .fetch_all();

  for (const auto &i: result_record) {
    REQUIRE(i.size() == 4);
    REQUIRE(i.at(0).name() == "id");
    REQUIRE(i.at(0).type() == data_type_t::type_long_long);
    REQUIRE(i.at(0).as<long long>() == george.id);
    REQUIRE(i.at(1).name() == "name");
    REQUIRE(i.at(1).type() == data_type_t::type_varchar);
    REQUIRE(i.at(1).as<std::string>() == george.name);
    REQUIRE(i.at(2).name() == "age");
    REQUIRE(i.at(2).type() == matador::sql::data_type_t::type_long_long);
    REQUIRE(i.at(2).as<long long>() == george.age);
  }

  // fetch person as person
  auto result_person = db.query(schema).select<person>()
  .from("person")
  .where("id"_col == 7)
  .fetch_all<person>();

  for (const auto &i: result_person) {
    REQUIRE(i.id == 7);
    REQUIRE(i.name == "george");
    REQUIRE(i.age == 45);
  }

  db.query(schema).drop().table("person").execute();
}

TEST_CASE_METHOD(QueryFixture, "Execute insert statement", "[session]")
{
  db.query(schema).create()
  .table("person", {
  make_pk_column<unsigned long>("id"),
  make_column<std::string>("name", 255),
  make_column<std::string>("color", 63)
  })
  .execute();

  auto res = db.query(schema).insert()
  .into("person", {{"", "id", ""}, {"", "name", ""}, {"", "color", ""}})
  .values({7, "george", "green"})
  .execute();

  REQUIRE(res == 1);

  // fetch person as record
  auto result_record = db.query(schema).select({"id", "name", "color"})
  .from("person")
  .where("id"_col == 7)
  .fetch_all();

  for (const auto &i: result_record) {
    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<unsigned 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() == "color");
    REQUIRE(i.at(2).type() == matador::sql::data_type_t::type_varchar);
    REQUIRE(i.at(2).as<std::string>() == "green");
  }

  db.query(schema).drop().table("person").execute();
}

TEST_CASE_METHOD(QueryFixture, "Select statement with foreign key", "[session]")
{
  schema.attach<airplane>("airplane");
  schema.attach<flight>("flight");
  db.query(schema).create()
  .table<airplane>("airplane")
  .execute();

  db.query(schema).create()
  .table<flight>("flight")
  .execute();

  std::vector<entity<airplane>> planes{
  make_entity<airplane>(1, "Airbus", "A380"),
  make_entity<airplane>(2, "Boeing", "707"),
  make_entity<airplane>(3, "Boeing", "747")
  };

  for (const auto &plane: planes) {
    auto res = db.query(schema).insert().into<airplane>("airplane").values(*plane).execute();
    REQUIRE(res == 1);
  }

  auto count = db.query(schema).select({count_all()}).from("airplane").fetch_value<int>();
  REQUIRE(count == 3);

  flight f4711{4, planes.at(1), "hans"};

  auto res = db.query(schema).insert().into<flight>("flight").values(f4711).execute();
  REQUIRE(res == 1);

  auto f = *db.query(schema).select<flight>().from("flight").fetch_all<flight>().begin();
  REQUIRE(f.id == 4);
  REQUIRE(f.pilot_name == "hans");
  REQUIRE(f.airplane.get() != nullptr);
  REQUIRE(f.airplane->id == 2);

  db.query(schema).drop().table("flight").execute();
  db.query(schema).drop().table("airplane").execute();
}

TEST_CASE_METHOD(QueryFixture, "Select statement with foreign key and join_left", "[session][join_left]")
{
  schema.attach<airplane>("airplane");
  schema.attach<flight>("flight");
  db.query(schema).create()
  .table<airplane>("airplane")
  .execute();

  db.query(schema).create()
  .table<flight>("flight")
  .execute();

  std::vector<entity<airplane>> planes{
  make_entity<airplane>(1, "Airbus", "A380"),
  make_entity<airplane>(2, "Boeing", "707"),
  make_entity<airplane>(3, "Boeing", "747")
  };

  for (const auto &plane: planes) {
    auto res = db.query(schema).insert().into<airplane>("airplane").values(*plane).execute();
    REQUIRE(res == 1);
  }

  auto count = db.query(schema).select({count_all()}).from("airplane").fetch_value<int>();
  REQUIRE(count == 3);

  std::vector<entity<flight>> flights{
  make_entity<flight>(4, planes.at(0), "hans"),
  make_entity<flight>(5, planes.at(0), "otto"),
  make_entity<flight>(6, planes.at(1), "george"),
  make_entity<flight>(7, planes.at(2), "paul")
  };

  for (const auto &f: flights) {
    auto res = db.query(schema).insert().into<flight>("flight").values(*f).execute();
    REQUIRE(res == 1);
  }

  auto f = *db.query(schema).select<flight>().from("flight").fetch_all<flight>().begin();
  REQUIRE(f.id == 4);
  REQUIRE(f.pilot_name == "hans");
  REQUIRE(f.airplane.get() != nullptr);
  REQUIRE(f.airplane->id == 1);

  auto result = db.query(schema).select({"f.id", "ap.brand", "ap.model", "f.pilot_name"})
    .from({"flight", "f"})
    .join_left({"airplane", "ap"})
    .on("f.airplane_id"_col == "ap.id"_col)
    .order_by("f.id").asc()
    .fetch_all();

  std::vector<std::pair<unsigned long, std::string>> expected_result {
    {4, "hans"},
    {5, "otto"},
    {6, "george"},
    {7, "paul"}
  };
  size_t index{0};
  for (const auto &r: result) {
    REQUIRE(r.size() == 4);
    REQUIRE(r.at(0).as<unsigned long>() == expected_result[index].first);
    REQUIRE(r.at(3).as<std::string>() == expected_result[index++].second);
  }

  db.query(schema).drop().table("flight").execute();
  db.query(schema).drop().table("airplane").execute();

}