#include "matador/object/object_generator.hpp"

#include "matador/object/repository.hpp"

#include <algorithm>

namespace matador::object {
object_generator::object_generator(repository& repo, const std::shared_ptr<object>& object)
: repo_(repo)
, object_(object) {}

void object_generator::on_revision(const char* id, uint64_t& rev) {
  on_attribute(id, rev);
}

void object_generator::create_pk_constraint(const std::string& name) const {
    class constraint pk_constraint("PK_" + object_->name());
    pk_constraint.options_ |= utils::constraints::PrimaryKey;
    if (const auto pk_attr = find_attribute_by_name(name); pk_attr != std::end(object_->attributes_)) {
        pk_constraint.attr_ = &*pk_attr;
    }
    pk_constraint.owner_ = object_;
    object_->constraints_.emplace_back(std::move(pk_constraint));
}

void object_generator::create_fk_constraint(const std::type_index& ti, const std::string& name) const {
    const auto obj = fk_object(ti);
    const auto *pk_attribute = obj->primary_key_attribute();
    class constraint pk_constraint("FK_" + object_->name() + "_" + name);
    pk_constraint.options_ |= utils::constraints::ForeignKey;
    if (const auto pk_attr = find_attribute_by_name(name); pk_attr != std::end(object_->attributes_)) {
        pk_constraint.attr_ = &*pk_attr;
    }
    pk_constraint.owner_ = object_;
    pk_constraint.reference_ = obj;
    if (pk_attribute) {
        pk_constraint.ref_column_name_ = pk_attribute->name();
        pk_constraint.ref_table_name_ = pk_attribute->owner() ? pk_attribute->owner()->name() : "";
    }
    object_->constraints_.emplace_back(std::move(pk_constraint));
}

void object_generator::create_unique_constraint(const std::string& name) const {
    class constraint pk_constraint("UK_" + object_->name() + "_" + name);
    pk_constraint.options_ |= utils::constraints::Unique;
    if (const auto pk_attr = find_attribute_by_name(name); pk_attr != std::end(object_->attributes_)) {
        pk_constraint.attr_ = &*pk_attr;
    }
    pk_constraint.owner_ = object_;
}

std::list<attribute>::iterator object_generator::find_attribute_by_name(const std::string& name) const {
    return std::find_if(std::begin(object_->attributes_), std::end(object_->attributes_), [&name](const attribute& elem) {
      return elem.name() == name;
    });
}

void object_generator::prepare_primary_key(attribute& ref, utils::identifier &&pk) const {
    object_->pk_attribute_ = &ref;
    object_->pk_identifier_ = std::move(pk);
}

std::shared_ptr<class object> object_generator::fk_object(const std::type_index& ti) const {
  const auto result = repo_.basic_info(ti);
  if (result) {
    return result->get().object();
  }

  return repo_.provide_object_in_advance(ti, std::make_shared<object>(""));
}
}