#include "user_manager_db.h"

#include "../users/user.h"

#include "../../database/database.h"
#include "../../database/database_connection.h"
#include "../../database/database_manager.h"
#include "../../database/query_builder.h"
#include "../../database/query_result.h"
#include "../../database/table_builder.h"

String UserManagerDB::get_database_table_name() {
	return _database_table_name;
}
void UserManagerDB::set_database_table_name(const String &val) {
	_database_table_name = val;
}

Ref<Database> UserManagerDB::get_database() {
	if (_database.is_valid()) {
		return _database;
	}

	return DatabaseManager::get_singleton()->get_ddb();
}

void UserManagerDB::set_database(const Ref<Database> &db) {
	_database = db;

	// todo send event to children when it's implemented?
}

Ref<DatabaseConnection> UserManagerDB::get_database_connection() {
	Ref<Database> db = get_database();

	ERR_FAIL_COND_V(!db.is_valid(), Ref<DatabaseConnection>());

	Ref<DatabaseConnection> conn = db->get_connection();

	ERR_FAIL_COND_V(!conn.is_valid(), Ref<DatabaseConnection>());

	return conn;
}

Ref<TableBuilder> UserManagerDB::get_table_builder() {
	Ref<Database> db = get_database();

	ERR_FAIL_COND_V(!db.is_valid(), Ref<TableBuilder>());

	Ref<DatabaseConnection> conn = db->get_connection();

	ERR_FAIL_COND_V(!conn.is_valid(), Ref<TableBuilder>());

	return conn->get_table_builder();
}

Ref<QueryBuilder> UserManagerDB::get_query_builder() {
	Ref<Database> db = get_database();

	ERR_FAIL_COND_V(!db.is_valid(), Ref<QueryBuilder>());

	Ref<DatabaseConnection> conn = db->get_connection();

	ERR_FAIL_COND_V(!conn.is_valid(), Ref<QueryBuilder>());

	return conn->get_query_builder();
}

Ref<User> UserManagerDB::_get_user(const int id) {
	if (id <= 0) {
		return Ref<User>();
	}

	Ref<QueryBuilder> b = get_query_builder();

	b->select("username, email, rank, pre_salt, post_salt, password_hash, banned, password_reset_token, locked");
	b->from(_database_table_name);

	b->where()->wpi("id", id);

	b->end_command();

	Ref<QueryResult> r = b->run();

	if (!r->next_row()) {
		return Ref<User>();
	}

	Ref<User> user;
	user = create_user();

	user->set_user_id(id);
	user->set_user_name(r->get_cell(0));
	user->set_email(r->get_cell(1));
	user->set_rank(r->get_cell_int(2));
	user->set_pre_salt(r->get_cell(3));
	user->set_post_salt(r->get_cell(4));
	user->set_password_hash(r->get_cell(5));
	user->set_banned(r->get_cell_bool(6));
	user->set_password_reset_token(r->get_cell(7));
	user->set_locked(r->get_cell_bool(8));

	return user;
}
Ref<User> UserManagerDB::_get_user_name(const String &user_name) {
	if (user_name.empty()) {
		return Ref<User>();
	}

	Ref<QueryBuilder> b = get_query_builder();

	b->select("id, email, rank, pre_salt, post_salt, password_hash, banned, password_reset_token, locked");
	b->from(_database_table_name);
	b->where()->wps("username", user_name);
	b->end_command();

	Ref<QueryResult> r = b->run();

	if (!r->next_row()) {
		return Ref<User>();
	}

	Ref<User> user;
	user = create_user();

	user->set_user_id(r->get_cell_int(0));
	user->set_user_name(user_name);
	user->set_email(r->get_cell(1));
	user->set_rank(r->get_cell_int(2));
	user->set_pre_salt(r->get_cell(3));
	user->set_post_salt(r->get_cell(4));
	user->set_password_hash(r->get_cell(5));
	user->set_banned(r->get_cell_bool(6));
	user->set_password_reset_token(r->get_cell(7));
	user->set_locked(r->get_cell_bool(8));

	return user;
}
Ref<User> UserManagerDB::_get_user_email(const String &user_email) {
	if (user_email.empty()) {
		return Ref<User>();
	}

	Ref<QueryBuilder> b = get_query_builder();

	b->select("id, username, rank, pre_salt, post_salt, password_hash, banned, password_reset_token, locked");
	b->from(_database_table_name);
	b->where()->wps("email", user_email);
	b->end_command();

	Ref<QueryResult> r = b->run();

	if (!r->next_row()) {
		return Ref<User>();
	}

	Ref<User> user;
	user = create_user();

	user->set_user_id(r->get_cell_int(0));
	user->set_user_name(r->get_cell(1));
	user->set_email(user_email);
	user->set_rank(r->get_cell_int(2));
	user->set_pre_salt(r->get_cell(3));
	user->set_post_salt(r->get_cell(4));
	user->set_password_hash(r->get_cell(5));
	user->set_banned(r->get_cell_bool(6));
	user->set_password_reset_token(r->get_cell(7));
	user->set_locked(r->get_cell_bool(8));

	return user;
}

void UserManagerDB::_save_user(Ref<User> user) {
	Ref<QueryBuilder> b = get_query_builder();

	if (user->get_user_id() == -1) {
		b->insert(_database_table_name, "username, email, rank, pre_salt, post_salt, password_hash, banned, password_reset_token, locked");

		b->values();
		b->vals(user->get_user_name());
		b->vals(user->get_email());
		b->vali(user->get_rank());
		b->vals(user->get_pre_salt());
		b->vals(user->get_post_salt());
		b->vals(user->get_password_hash());
		b->valb(user->get_banned());
		b->vals(user->get_password_reset_token());
		b->valb(user->get_locked());
		b->cvalues();

		b->end_command();
		b->select_last_insert_id();
		
		Ref<QueryResult> r = b->run();

		user->set_user_id(r->get_last_insert_rowid());
	} else {
		b->update(_database_table_name);
		b->sets();
		b->setps("username", user->get_user_name());
		b->setps("email", user->get_email());
		b->setpi("rank", user->get_rank());
		b->setps("pre_salt", user->get_pre_salt());
		b->setps("post_salt", user->get_post_salt());
		b->setps("password_hash", user->get_password_hash());
		b->setpb("banned", user->get_banned());
		b->setps("password_reset_token", user->get_password_reset_token());
		b->setpb("locked", user->get_locked());
		b->cset();
		b->where()->wpi("id", user->get_user_id());

		// b->print();

		b->run_query();
	}
}
Ref<User> UserManagerDB::_create_user() {
	Ref<User> u;
	u.instance();

	//save_user(u);
	u->connect("changed", this, "_save_user", varray(u));

	return u;
}
bool UserManagerDB::_is_username_taken(const String &user_name) {
	Ref<QueryBuilder> b = get_query_builder();

	b->select("id")->from(_database_table_name)->where("username")->like(user_name)->end_command();

	Ref<QueryResult> r = b->run();

	return r->next_row();
}
bool UserManagerDB::_is_email_taken(const String &email) {
	Ref<QueryBuilder> b = get_query_builder();

	b->select("id")->from(_database_table_name)->where("username")->like(email)->end_command();

	Ref<QueryResult> r = b->run();

	return r->next_row();
}

Vector<Ref<User>> UserManagerDB::get_all() {
	Ref<QueryBuilder> b = get_query_builder();

	b->select("id, username, email, rank, pre_salt, post_salt, password_hash, banned, password_reset_token, locked");
	b->from(_database_table_name);
	b->end_command();
	// b->print();

	Vector<Ref<User>> users;

	Ref<QueryResult> r = b->run();

	while (r->next_row()) {
		Ref<User> user = create_user();

		user->set_user_id(r->get_cell_int(0));
		user->set_user_name(r->get_cell(1));
		user->set_email(r->get_cell(2));
		user->set_rank(r->get_cell_int(3));
		user->set_pre_salt(r->get_cell(4));
		user->set_post_salt(r->get_cell(5));
		user->set_password_hash(r->get_cell(6));
		user->set_banned(r->get_cell_bool(7));
		user->set_password_reset_token(r->get_cell(8));
		user->set_locked(r->get_cell_bool(9));

		users.push_back(user);
	}

	return users;
}

void UserManagerDB::create_table() {
	call("_create_table");
}
void UserManagerDB::drop_table() {
	call("_drop_table");
}
void UserManagerDB::update_table(const int p_current_table_version) {
	call("_update_table", p_current_table_version);
}
void UserManagerDB::create_default_entries(const int p_seed) {
	call("_create_default_entries", p_seed);
}

void UserManagerDB::_create_table() {
	Ref<TableBuilder> tb = get_table_builder();

	tb->create_table(_database_table_name);
	tb->integer("id")->auto_increment()->next_row();
	tb->varchar("username", 60)->not_null()->next_row();
	tb->varchar("email", 100)->not_null()->next_row();
	tb->integer("rank")->not_null()->next_row();
	tb->varchar("pre_salt", 100)->next_row();
	tb->varchar("post_salt", 100)->next_row();
	tb->varchar("password_hash", 100)->next_row();
	tb->integer("banned")->next_row();
	tb->varchar("password_reset_token", 100)->next_row();
	tb->integer("locked")->next_row();
	tb->primary_key("id");
	tb->ccreate_table();
	tb->run_query();
	// tb->print();
}
void UserManagerDB::_drop_table() {
	Ref<TableBuilder> tb = get_table_builder();

	tb->drop_table_if_exists(_database_table_name)->run_query();
}

void UserManagerDB::_update_table(const int p_current_table_version) {
}

void UserManagerDB::_create_default_entries(const int p_seed) {
	Ref<User> user;
	user = create_user();

	user->set_rank(3);
	user->set_user_name("admin");
	user->set_email("admin@admin.com");

	user->create_password("Password");
	user->save();

	user = create_user();

	user->set_rank(1);
	user->set_user_name("user");
	user->set_email("user@user.com");

	user->create_password("Password");
	user->save();
}

void UserManagerDB::migrate(const bool p_clear, const bool p_should_seed, const int p_seed) {
	call("_migrate", p_clear, p_should_seed, p_seed);
}

void UserManagerDB::_migrate(const bool p_clear, const bool p_should_seed, const int p_seed) {
	if (p_clear) {
		drop_table();
		create_table();
	} else {
#ifdef MODULE_DATABASE_ENABLED
		Ref<DatabaseConnection> conn = get_database_connection();
		ERR_FAIL_COND(!conn.is_valid());
		int ver = conn->get_table_version(_database_table_name);
		update_table(ver);
#else
		update_table(0);
#endif
	}

	if (p_should_seed) {
		create_default_entries(p_seed);
	}
}

UserManagerDB::UserManagerDB() {
	_database_table_name = "users";
}

UserManagerDB::~UserManagerDB() {
}

void UserManagerDB::_notification(const int what) {
	switch (what) {
		case NOTIFICATION_ENTER_TREE: {
			DatabaseManager::get_singleton()->connect("migration", this, "migrate");
		} break;
		case NOTIFICATION_EXIT_TREE: {
			DatabaseManager::get_singleton()->disconnect("migration", this, "migrate");
		} break;
		default:
			break;
	}
}

void UserManagerDB::_bind_methods() {
	ClassDB::bind_method(D_METHOD("get_database_table_name"), &UserManagerDB::get_database_table_name);
	ClassDB::bind_method(D_METHOD("set_database_table_name", "val"), &UserManagerDB::set_database_table_name);
	ADD_PROPERTY(PropertyInfo(Variant::STRING, "database_table_name"), "set_database_table_name", "get_database_table_name");

	ClassDB::bind_method(D_METHOD("get_database"), &UserManagerDB::get_database);
	ClassDB::bind_method(D_METHOD("set_database", "val"), &UserManagerDB::set_database);
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "database", PROPERTY_HINT_RESOURCE_TYPE, "Database", 0), "set_database", "get_database");

	ClassDB::bind_method(D_METHOD("get_database_connection"), &UserManagerDB::get_database_connection);
	ClassDB::bind_method(D_METHOD("get_table_builder"), &UserManagerDB::get_table_builder);
	ClassDB::bind_method(D_METHOD("get_query_builder"), &UserManagerDB::get_query_builder);

	BIND_VMETHOD(MethodInfo("_create_table"));
	BIND_VMETHOD(MethodInfo("_drop_table"));
	BIND_VMETHOD(MethodInfo("_update_table", PropertyInfo(Variant::INT, "current_table_version")));
	BIND_VMETHOD(MethodInfo("_create_default_entries", PropertyInfo(Variant::INT, "pseed")));

	ClassDB::bind_method(D_METHOD("create_table"), &UserManagerDB::create_table);
	ClassDB::bind_method(D_METHOD("drop_table"), &UserManagerDB::drop_table);
	ClassDB::bind_method(D_METHOD("update_table", "current_table_version"), &UserManagerDB::update_table);
	ClassDB::bind_method(D_METHOD("create_default_entries", "pseed"), &UserManagerDB::create_default_entries);

	ClassDB::bind_method(D_METHOD("_create_table"), &UserManagerDB::_create_table);
	ClassDB::bind_method(D_METHOD("_drop_table"), &UserManagerDB::_drop_table);
	ClassDB::bind_method(D_METHOD("_update_table", "current_table_version"), &UserManagerDB::_update_table);
	ClassDB::bind_method(D_METHOD("_create_default_entries", "pseed"), &UserManagerDB::_create_default_entries);

	BIND_VMETHOD(MethodInfo("_migrate", PropertyInfo(Variant::BOOL, "clear"), PropertyInfo(Variant::BOOL, "should_seed"), PropertyInfo(Variant::INT, "pseed")));
	ClassDB::bind_method(D_METHOD("migrate", "clear", "pseed"), &UserManagerDB::migrate);
	ClassDB::bind_method(D_METHOD("_migrate", "clear", "pseed"), &UserManagerDB::_migrate);
}